communication method, base station, terminal device, computer-readable storage medium and communicat

专利摘要:
the embodiments of the present invention provide a method of communication, a base station and a terminal device. the method includes: transmitting signals through a base station to a terminal device using n port groups, where each port group n includes at least two ports, and n is a positive integer greater than or equal to 2; and receiving, by the base station, the first groups of linear combination coefficients transmitted by the terminal device, where each first group of linear combination coefficients includes the first linear combination coefficients of one of the door groups, at least one first group of linear combination coefficient includes at least two non-zero coefficients, the first linear combination coefficient groups are used to determine a first pre-coding matrix, port groups s are included in port groups n, s is an integer positive less than or equal to n, es is a positive integer greater than or equal to 2. In the embodiments of the present invention, the first groups of linear combination coefficient are transmitted to the base station. this can improve the accuracy of the channel return from the terminal device, and further help to improve the transmission performance between the base station and the terminal device.
公开号:BR112019013770A2
申请号:R112019013770
申请日:2018-01-03
公开日:2020-01-21
发明作者:Qu Bingyu；Liu Kunpeng；Li Xueru
申请人:Huawei Tech Co Ltd；
IPC主号:

专利说明:

COMMUNICATION METHOD, BASE STATION, TERMINAL DEVICE, LEGIBLE STORAGE MEDIA BY COMPUTER AND COMMUNICATIONS DEVICE [001] This application claims priority of Chinese Patent Application No. 201710002771.8, filed at the Chinese Patent Office on January 3, 2017 and entitled COMMUNICATION METHOD, BASE STATION, AND TERMINAL DEVICE, and Chinese Patent Application No. 201710079315.3, filed with the Chinese Patent Office on February 14, 2017 and entitled COMMUNICATION METHOD, BASE STATION AND TERMINAL DEVICE, both incorporated herein by reference in your totality.
TECHNICAL FIELD [002] The embodiments of the present invention refer to the field of communications and, more specifically, to a method of communication, a base station and a terminal device.
BACKGROUND [003] In a multiple input multiple output (MIMO) system, a base station can select an appropriate spatial precoding matrix for data using accurate channel state information (CSI) , to increase the signal strength received from user equipment (User Equipment, UE), reduce interference between different UEs, and simultaneously transmit a plurality of data streams to the UE, thereby greatly increasing a data transmission rate .
[004] Specifically, in the state of the art, the base station transmits, using a plurality of
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2/138 ports, a plurality of measurement reference signals on which pre-coding processing has been performed. The UE measures the plurality of measurement reference signals received, calculates channel coefficients of the port signals for the UE, selects, from the channel coefficients, a channel coefficient (for example, a channel coefficient with greater power) that best corresponds to an actual current channel condition, and feeds back to the base station a port number that corresponds to the channel coefficient. The base station can determine, based on the number fed back by the UE, a pre-coding matrix for transmitting subsequent data.
[005] However, since the number of ports is limited, downlink channels reflected by a plurality of channel coefficients measured by the UE are also limited. If none of the plurality of channel coefficients measured by the UE matches the actual current condition of the channel, the accuracy of the channel feedback is relatively low, and in addition, the transmission performance is affected.
SUMMARY [006] Embodiments of the present invention provide a communication method, a base station and a terminal device for improving the accuracy of channel feedback.
[007] According to a first aspect, a method of communication is provided and includes:
transmit signals to a terminal device via a base station using n groups of ports, each of which n groups of ports includes at least two
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3/138 ports, and n is a positive integer greater than or equal to 2; and receiving, by the first base station, the first groups of linear combination coefficients transmitted by the terminal device, wherein each first group of linear combination coefficients includes first linear combination coefficients of one of the s groups of doors, at least one first group of linear combination coefficients includes at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first precoding matrix, the port groups are included in the n port groups, s is a positive integer less than or equal to n, es is a positive integer greater than or equal to 2.
[008] In this embodiment of this
invention, the first s groups in coefficients in combination linear are transmitted for the base station. This can improve the accuracy of channel feedback of device terminal in addition to help improving O performance transmission in between the base station and O device terminal. [009] Optionally, the signs transmitted by
base station using the n port groups are used to measure the channel coefficients of a plurality of channels from the n port groups to the terminal device. For example, signs are reference signs.
[0010] In some possible implementations, the first pre-coding matrix is obtained based on the first groups of linear combination coefficients and the
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4/138 are groups of base vectors, and each group of base vectors includes base vectors from one of the door groups.
[0011] Optionally, the first groups of linear combination coefficients are used to perform linear combination in the groups of base vectors to obtain the first precoding matrix.
[0012] In some possible implementations, the method also includes:
receive, from the base station, the base vector information and the second linear combination coefficients transmitted by the terminal device, where the base vector information is used to indicate the groups of base vectors, each group of base vectors includes vectors base of one of the door groups, and at least one base vector group includes at least two base vectors; and the first precoding matrix is obtained through calculation based on the s groups of base vectors, the first groups of linear combination coefficients, and the second linear combination coefficients.
[0013] Optionally, each first group of linear combination coefficients is used to perform the linear combination in each group of base vectors to generate a second precoding matrix for each group of doors, and the second linear combination coefficients are used to perform linear combinations on the second precoding arrays of the door groups to obtain the first precoding array.
[0014] In some possible implementations, before the base station receives the first groups
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5/138 of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, by the base station, the first configuration information to the terminal device; or receive, by the base station, the first configuration information transmitted by the terminal device; where the first configuration information is used to indicate at least a frequency domain granularity of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient, and an amount of quantized bits of the phase and an amount quantified bits of the amplitude of each second linear combination coefficient.
[0015] Optionally, the frequency domain granularity of the phase and the frequency domain granularity of the amplitude of each second linear combination coefficient include a frequency domain granularity of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient transmitted by the terminal device. The frequency domain granularity can include a subband frequency domain granularity, a broadband frequency domain granularity, a partial bandwidth frequency domain granularity, or other frequency domain granularity. This is not limited to this embodiment of the present invention.
[0016] In some possible implementations, before the base station receives the first groups
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6/138 of linear combination coefficients transmitted by the terminal device, the method also includes:
transmitting, by the base station, the second configuration information of each of the n groups of ports to the terminal device; or receive, by the base station, the second configuration information for each of the n groups of ports, transmitted by the terminal device; where the second configuration information is used to
indicate a group of vectors in base of each group in doors.[0017] Optionally, The base station or O device terminal can conf igurate separately The
second configuration information for each of the n door groups. For example, the second configuration information for at least two of the n port groups is different. However, this is not limited in this embodiment of the present invention. All information for the second configuration of the n door groups can be the same. For example, the base station or terminal device can configure the second configuration information of the n groups of ports in a unified manner. Alternatively, the base station or terminal device can separately configure the second configuration information for the n door groups, and all the second configuration information for the n door groups can be the same.
[0018] Proper setting of a base vector port group size can further reduce feedback overloads of the terminal device.
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7/138 [0019] In some possible implementations, before the base station receives the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, through the base station, third configuration information to the terminal device; or receive, by the base station, third configuration information transmitted by the terminal device; where the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
[0020] In some possible implementations, before the reception, by the base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmitting, by the base station, fourth configuration information for each of the n groups of ports to the terminal device; or receive, by the base station, fourth configuration information for each of the n groups of ports, transmitted by the terminal device; where the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and a number of quantized bits of the amplitudes of the first coefficients of linear combinations of each group of gates.
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8/138 [0021] Optionally, the frequency domain granularity of the phases and the frequency domain granularity of the amplitudes of the first linear combination coefficients of each port group include a phase frequency domain granularity and a domain granularity frequency of the amplitudes of the first linear combination coefficients of each group of doors, transmitted by the terminal device. The frequency domain granularity can include a subband frequency domain granularity, a broadband frequency domain granularity, a partial bandwidth frequency domain granularity, or another frequency domain granularity. This is not limited to this embodiment of the present invention.
[0022] Optionally, the base station or terminal device can separately configure the fourth configuration information for each of the n groups of ports. For example, the fourth configuration information for at least two of the n port groups is different. Separate configuration of the fourth configuration information for different port groups can reduce the feedback overloads of the terminal device.
[0023] However, this is not limited in this embodiment of the present invention. All fourth configuration information for the n door groups can be the same. For example, the base station or terminal device can configure the fourth configuration information of the n groups of ports in a unified manner. Alternatively, the base station or terminal device can configure
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9/138 separately the fourth configuration information of the n door groups, and all the fourth configuration information of the n door groups can be the same.
[0024] In some possible implementations, before the reception, by the base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, by the base station, grouping information of the n groups of ports to the terminal device.
[0025] Optionally, the grouping information is used to indicate a number of ports and / or a grouping of ports.
[0026] In some possible implementations, the first groups of linear combination coefficients are used to perform the linear combination in the groups of base vectors to obtain the first precoding matrix.
[0027] Before receiving, by the first base station, the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, through the base station, fifth configuration information to the terminal device; or receive, by the base station, the fifth configuration information transmitted by the terminal device; where the fifth configuration information is used to indicate a number of ports selected by the terminal device for each group of ports.
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10/138 [0028] It should be noted that the base station and the terminal device can pre-store a number of ports in each group of ports. Therefore, the base station does not need to transmit the fifth configuration information to the terminal device, and does not need to receive the fifth
information configuration transmitted by the device terminal. [0029] According one second aspect, one method of communication is provided and includes: to receive, by a device terminal, signals
transmitted by a base station using n groups of ports, where each of the n groups of ports includes at least two ports, and n is a positive integer greater than or equal to 2; and transmitting, by the terminal device, the first groups of linear combination coefficients to the base station, wherein each first group of linear combination coefficients includes first linear combination coefficients of one of the door groups, at least one first group linear combination coefficients includes at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first precoding matrix, the door groups are included in the n door groups, s is an integer positive less than or equal to n, es is a positive integer greater than or equal to 2.
[0030] In this embodiment of the present invention, the first groups of linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the
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11/138
device terminal in addition in help to improve performance transmission between station base it's the device terminal. [0031] Optionally, the transmitted signals through the
base station using the n port groups are used to measure the channel coefficients of a plurality of channels from the n port groups to the terminal device. For example, signs are reference signs.
[0032] In some possible implementations, the first pre-coding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of base vectors includes base vectors of a door groups.
[0033] Optionally, the first groups of linear combination coefficients are used to perform linear combination in the groups of base vectors to obtain the first precoding matrix.
[0034] In some possible implementations, the method also includes:
transmit, by the terminal device, base vector information and the second linear combination coefficients to the base station, where the base vector information is used to indicate the groups of base vectors, each group of base vectors includes base vectors of one of the door groups, and at least one base vector group includes at least two base vectors; and the first pre-coding matrix is obtained by calculating based on the s groups of base vectors, the first s groups of
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12/138 linear combination coefficients and the second linear combination coefficients.
[0035] Optionally, each first group of linear combination coefficients is used to perform linear combinations in each group of base vectors to generate a second precoding matrix for each group of doors, and the second linear combination coefficients are used to perform linear combinations in precoding arrays of door groups to obtain the first precoding array.
[0036] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
receiving, by the terminal device, the first configuration information transmitted by the base station; or transmit, through the terminal device, the first configuration information to the base station; where the first configuration information is used to indicate at least one frequency domain granularity of a phase and one frequency domain granularity of an amplitude of each second linear combination coefficient, and an amount of quantized bits of the phase and an amount quantified bits of the amplitude of each second linear combination coefficient.
[0037] Optionally , the granularity of domain in frequency of phase and the granularity of domain in frequency a breadth of every second coefficient in linear combination include a granularity of domain in
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13/138 frequency of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient transmitted by the terminal device. The frequency domain granularity can include a subband frequency domain granularity, a broadband frequency domain granularity, a partial bandwidth frequency domain granularity, or another frequency domain granularity. This is not limited to this embodiment of the present invention.
[0038] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
receiving, by the terminal device, the second configuration information corresponding to each of the n groups of ports, transmitted by the base station; or transmit, through the terminal device, the second configuration information corresponding to each of the n
door groups to the station base; Where the second information configuration is used for indicate a group of vectors base corresponding to each door group. [0039] Optionally, the station base or O
terminal device can separately configure the second configuration information for each of the n groups
of doors. For example, The Monday information in configuration at least two of the n groups of doors is different. At the However, this no is limited in this form in
realization of the present invention. All information
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14/138 second configuration of the n door groups can be the same. For example, the base station or terminal device can configure the second configuration information of the n groups of ports in a unified manner. Alternatively, the base station or terminal device can separately configure the second configuration information for the n door groups and all the second configuration information for the n door groups can be the same.
[0040] Proper setting of a base vector port group size can further reduce feedback overloads of the terminal device.
[0041] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
receiving, by the terminal device, third configuration information transmitted by the base station; or transmit, through the terminal device, third configuration information to the base station; where the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
[0042] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
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15/138 receive, by the terminal device, fourth configuration information for each of the n groups of ports, transmitted by the base station; or transmit, by the terminal device, fourth configuration information for each of the n groups of ports to the base station; where the fourth configuration information used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and a quantified bits quantity of the amplitudes of the first linear combination coefficients of each group of doors;
[0043] Optionally, the frequency domain granularity of the phases and the frequency domain granularity of the amplitudes of the first linear combination coefficients of each port group include a phase frequency domain granularity and a frequency domain granularity of the amplitudes of the first linear combination coefficients for each group of doors, transmitted by the terminal device. The frequency domain granularity can include a subband frequency domain granularity, a broadband frequency domain granularity, a partial bandwidth frequency domain granularity, or another frequency domain granularity. This is not limited to this embodiment of the present invention.
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16/138 [0044] Optionally, the base station or the terminal device can separately configure the fourth configuration information of each of the n groups of ports. For example, the fourth forming configuration of at least two of the n door groups is different. The separate configuration of the fourth configuration information for different ports can reduce the feedback overloads of the terminal device.
[0045] However, this is not limited in this embodiment of the present invention. All fourth configuration information for the n door groups can be the same. For example, the base station or terminal device can configure the fourth configuration information of the n groups of ports in a unified manner. Alternatively, the base station or terminal device can separately configure the fourth configuration information for the n door groups, and all the fourth configuration information for the n door groups can be the same.
[0046] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
receive, by the terminal device, grouping information of the n groups of ports that are transmitted by the base station.
[0047] Optionally, the grouping information is used to indicate a number of ports and / or port grouping.
[0048] In some possible implementations, the first groups of linear combination coefficients are
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17/138 used to perform the linear combination in the groups of base vectors to obtain the first precoding matrix.
[0049] Before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method also includes:
receiving, by the terminal device, fifth configuration information transmitted by the base station; or transmit, through the terminal device, fifth
configuration information for the base station; Wherethe fifth information in configuration is used for indicate a quantity in selected ports fur
terminal device for each group of ports.
[0050] It should be noted that the base station and the terminal device can still pre-store a number of ports in each group of ports. Therefore, the base station does not need to transmit the fifth configuration information to the terminal device, and does not need to receive the fifth configuration information transmitted by the terminal device.
[0051] According to a third aspect, a method of communication is provided and includes:
receive, by a terminal device, reference signals from n groups of ports, where each of the n groups of ports includes p ports, n is a positive integer greater than or equal to 2, and p is a positive integer greater than or equal to 1; and transmit, by the terminal device, the first groups of linear combination coefficients, information of
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18/138 base vector, and the second linear combination coefficients, where the first linear combination coefficients, the base vector information, and the second linear combination coefficients are determined based on the measurement results of the reference signals of the n groups of doors, where the first groups of coefficients of linear combinations are first coefficients of linear combination of the groups of doors selected from n groups of doors, and are used to perform linear combinations in the groups of doors, where an xl -th port in a first port group is linearly combined with an x2-port in a second port group for an xs-port in a seventh port group in the port groups, 1 <x _w p, 1 w <s, 2 <sn, ex _w , w, es are integers; and the base vector information and the second linear combination coefficients are determined based on the first groups of linear combination coefficients, the base vector information is used to indicate at least two base vectors, the second combination coefficients linear are used to perform the linear combination at least two base vectors, and the first groups of coefficients of linear combinations, the at least two base vectors, and the second linear combination coefficients are used to determine a pre- coding.
[0052] It should be understood that the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are determined by the device
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19/138 terminal based on the measurement results of the reference signals of the n door groups.
[0053] The first groups of linear combination coefficients are used by the terminal device or by a base station to carry out the linear combination in the door groups.
[0054] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information, and the second linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[0055] In some possible implementations, the xth port in the first port group, and the x2-port in the second port group for the xs-port in the s-port group in the port groups correspond to the same port antenna.
[0056] In some possible implementations, the method also includes:
transmit, through the terminal device, a CQI channel quality indicator, where the CQI is determined based on the port identifiers in the s groups and a matrix W, and the matrix W satisfies the following expression:
W = W3 * Wi * W2, where W3 is a matrix including the first linear coefficient groups, Wi is a matrix including at least two base vectors, and W2 is a
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20/138 matrix that includes the second coefficients of the linear combination.
[0057] In some possible implementations, the method also includes:
transmit, through the terminal device, a CQI, where the CQI is determined based on a W matrix, and the W matrix satisfies the following expression:
w = w ₄ * W ₃ * Wi * W2, Where W ₄ is a matrix used for indicate identifiers in doors us groups s, W3 is matrix
including the first linear combination coefficient groups, Wi is a matrix that includes the at least two base vectors, and W2 is a matrix including the second linear combination coefficients.
[0058] In some possible implementations, W3 satisfies the following expression:
Where
Cf is a diaqonal matrix whose dimensions are —X-,
2 (11 1 22 2 (Xj _{p / 1} , (Xj , (Xj, p / 2j θ is a j-first combination coefficient group in the first linear coefficient coefficient groups, j = 1,.... , s, ei = 1 or
W3 satisfies the following expression:
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Where
C · is a diagonal matrix whose dimensions are first group first groups
The.
pxp is a j-th linear combination coefficient in the s of linear combination coefficient, and j [0059] In some possible implementations, W3 satisfies the following expression:
«I a,
W ₃ =.
% r
where the dimensions of W3 are psXp, d _w = 0C _2w , ..., (X _sw is a vector whose dimensions are sxl, (<Z ₇₁ , (Xj _P ) is an eleventh group of linear combination coefficient in the s first groups of linear combination coefficient [] ^Γ represents the transpose of a matrix, w = 1,..., p, ej = 1,..., s.
[0060] In some possible implementations, Wi satisfies the following expression:
iSb ...
_W _ ^. (1) M ^VV I “7, (2) 7, (2) 7, (2) ^ r ₂ (l) ^ 77 ₂ (2) ^ π ₂ (θ) _ r
where ^ (1), .., ^ (0), ^ 2 (1), .., 7 ^ 2 (0) ^ {1,2, ..., A /} are identifiers of the base vectors indicated by base vector information b ^ b ^ are both base vectors whose dimensions are
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22/138 ~ ^χ 1, j & {1,2, ..., M}, 0 is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 2; or [0061] Wi satisfies the following expression:
^W 1 = k (l) ri (2) ··· where π (1), .., π (θ) ε {1,2, ... Μ} are identifiers of the base vectors indicated by the vector information of base b, is a base vector whose dimensions are pxl, je {1,2, ..., M}, O is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 2 .
[0062] In some possible implementations, W2 satisfies the following expression:
^C l, l ^C l, 2 ^C 2, l ^C 2.2 ^C 1, R ^C 2, R where ^c i, r ~ L ^c i, r, i ''”' ^c i, r, oi and C2, _r - L ^c 2, r, i '···' ^c 2, r, J are separately vectors whose dimensions are Oxl, r is an integer greater than or equal to l and less than or equal to R, and R is a positive integer; or [0063]
W ₂ = [ _C1
W2 satisfies the following expression:
^C 2 ''' ^C R] r
where ^- LG, 1 '···' is a vector whose dimensions are
Oxl, r is an integer greater than or equal to l and less than or equal to
R, and R is a positive integer.
[0064] In some possible implementations, W4 satisfies the following expression:
Index η n τ p / 2
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23/138 where e represents a column vector whose length is n, a j-th element in e ”is 1, all other elements in e are 0, g _Á (l), ..., gj (s), g ₂ (l), ..., g ₂ (s) and {1,2, ..., n} represent the port identifiers in the s groups, I _m represents an identity matrix dimensions are m, and ® represents a Kronecker product; or
W4 satisfies the following expression:
Wn η η o τ '“[^ (1)' ^ (2) ··· '^ (ί) .Ιθ I _p where e represents a column vector whose length is n, a j-th element in e is 1 , all other elements in and are 0, g (l), ..., ^ (5) represent the port identifiers in the s groups, I _m represents an identity matrix dimensions are m, and ® represents a Kronecker product.
[0065] In some possible implementations, W4 satisfies aw ₄ = following expression / 0 ® le and í I p / 2 L gjll) '^ (2)' gJsJJ / 0 ® e (i , e í I where represents a column vector whose length is s, a j-th element in is 1, all other elements in are 0, g ₁ (1), ..., g ₁ (s), g ₂ (1) ,. .., g ₂ (5) G {1,2, ..., n] represent the door identifiers in the groups, ® represents a Kronecker product, and I _m represents an identity matrix whose dimensions are m; or [ 0066] W4 satisfies the following expression:
w =] ® íe * e ^s <x and ^s <x ^VV 4 ¹ p L ^e g (l) ' ^e g (2) ---' ^and g (s) J, where it represents a column vector whose length is s , a j-th element in is 1, all
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24/138 other elements in e) are 0, ^ (1), ..., ^ (^) ^ {1,2, ..., n} represent the port identifiers in the groups, ® represents a product of Kronecker, and I _m represents an identity matrix dimensions are m.
[0067] In some implementations possible, O method also includes: to transmit, by the terminal device information in indication for season base where the information in indication includes the identifiers of the doors us s groups. [0068] In some implementations possible, an
feedback frequency domain granularity and / or a quantity of quantized bits from each of the first groups of linear combination coefficients are / is different from a feedback frequency domain granularity and / or a quantity of quantized bits from each second combination coefficient and granularity of feedback frequency domain includes at least one of a broadband feedback, a sub-band feedback, and a partial bandwidth feedback.
[0069] In some possible implementations, the granularity of the feedback frequency domain of each of the first groups of linear combination coefficients is broadband feedback, and the granularity of the feedback frequency domain of each second combination coefficient. linear is sub-band feedback, or partial bandwidth feedback.
[0070] In some possible implementations, a number of quantized bits of amplitudes for each of the first groups of linear combination coefficients
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25/138 is greater than or equal to a quantity of quantized bits of an amplitude for each second linear combination coefficient; and / or an amount of quantized bits of phases for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of a phase of each second linear combination coefficient.
[0071] It should be understood that the granularity of the feedback frequency domain and / or the quantity of quantized bits of each of the first groups of linear combination coefficients and the granularity of the feedback frequency domain and / or the number of quantized bits of each second linear combination coefficient can be predefined or can be configured by the base station.
[0072] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients, the method also includes:
receive, by the terminal device, the first configuration information; or transmit, through the terminal device, the first configuration information; where the first configuration information is used to indicate a value of s or a maximum value of s.
[0073] In some possible implementations, before the transmission, by the terminal device, of the first groups of linear combination coefficients to the base station, the method also includes:
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26/138 receive, by the terminal device, second configuration information; or transmit, through the terminal device, the second configuration information; where the second configuration information is used to configure at least one phase feedback frequency domain granularity and one amplitude feedback frequency domain granularity of the first linear combination coefficients for each port group, and a number of bits quantified phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each group of gates.
[0074] In some possible implementations, before transmitting, by the terminal device, the second linear combination coefficients to the base station, the method also includes:
receive, by the terminal device, third configuration information; or transmit, through the terminal device, third configuration information; where the third configuration information is used to configure at least one phase frequency domain granularity and one frequency domain granularity of the amplitude of each second linear combination coefficient, and the number of quantized bits of the phase and the number of bits quantified of the amplitude of each second linear combination coefficient.
[0075] In some possible implementations, before the transmission, by the terminal device, of the first s
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27/138 groups of linear combination coefficients, the method also includes:
receive, by the terminal device, grouping information of the n groups of ports that are transmitted by the base station.
[0076] According to a fourth aspect, a method of communication is provided and includes:
transmit, through a base station, reference signals to a terminal device using n groups of ports, where each of the n groups of ports includes p ports, n is a positive integer greater than or equal to 2, and p is a major positive integer that or equal to 1; and receiving, by the base station, the first groups of linear combination coefficients, the base vector information, and the second linear combination coefficients transmitted by the terminal device, where the first groups of linear combination coefficients are first coefficients of linear combination of s door groups selected from n door groups, and are used to perform linear combinations in s door groups, where an xl-th door in a first door group is linearly combined with an x2-th door in one second group of doors for an xsth port in a seventh door group in the s door groups, 1 <x _w p, 1 w <s, 2 <sn, ex _w , w, es are integers; and the base vector information and the second linear combination coefficients are determined based on the first groups of linear combination coefficients, the base vector information is used to indicate at least two base vectors, the second coefficients
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28/138 linear combinations are used to perform the linear combination of at least two base vectors, and the first groups of linear combination coefficients, the at least two base vectors, and the second linear combination coefficients are used to determine a pre-coding matrix.
[0077] It should be understood that the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are determined by the terminal device based on the measurement results of the reference signals of the n groups of doors.
[0078] The first groups of coefficients of linear combinations are used by the terminal device or the base station to carry out the linear combination in the door groups.
[0079] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[0080] In some possible implementations, the xth port in the first port group, and the x2-port in the second port group for the xs-port in the s-port group in the port groups correspond to the same port antenna.
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29/138 [0081] In some possible implementations, the method also includes:
receive, by the base station, a CQI channel quality indicator, in which the CQI is determined based on the port identifiers in the groups, the first groups of linear combination coefficients, the base vector information and the second coefficients linear combination.
[0082] In some possible implementations, the method also includes:
receiving, by the base station, indication information transmitted by the terminal device, where the indication information includes the port identifiers in the groups.
[0083] In some possible implementations, a feedback frequency domain granularity and / or a quantized bit quantity for each of the first groups of linear combination coefficients is / is different from a feedback frequency domain granularity and / or a quantity of quantized bits of each second combination coefficient and the frequency domain granularity of feedback includes at least one of a broadband feedback, a subband feedback, and a partial bandwidth feedback.
[0084] In some possible implementations, the granularity of the feedback frequency domain of each of the first groups of linear combination coefficients is broadband feedback, and the granularity of the feedback frequency domain of each second
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30/138 linear combination coefficient is subband feedback, or partial bandwidth feedback.
[0085] In some possible implementations, an amount of quantized bits of amplitude for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of an amplitude of each second linear combination coefficient; and / or an amount of quantized bits of phases for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of a phase of each second linear combination coefficient.
[0086] In some possible implementations, before receiving, by the base station, the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, by the base station, the first configuration information to the terminal device; or receive, by the base station, the first configuration information transmitted by the terminal device; where the first configuration information is used to indicate a value of s or a maximum value of s.
[0087] In some possible implementations, before the reception, by the base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, by the base station, the second configuration information to the terminal device; or
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31/138 receive, by the base station, the second configuration information transmitted by the terminal device; where the second configuration information is used to configure at least one phase feedback frequency domain granularity and one amplitude feedback frequency domain granularity of the first linear combination coefficients of each port group, and a number of bits quantified phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each group of gates.
[0088] In some possible implementations, before receiving, by the base station, the second linear combination coefficients transmitted by the terminal device, the method also includes:
transmit, through the base station, third configuration information to the terminal device; or receive, by the base station, third configuration information transmitted by the terminal device; where the third configuration information is used to configure at least one phase frequency domain granularity and one frequency domain granularity of the amplitude of each second linear combination coefficient, and the number of quantized bits of the phase and the number of bits quantified of the amplitude of each second linear combination coefficient.
[0089] In some possible implementations, before the reception, by the base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method also includes:
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32/138 transmit, by the base station, grouping information of the n groups of ports.
[0090] According to a fifth aspect, a base station is provided, in which the base station is configured to implement the method in any of the first aspect or possible implementations of the first aspect.
[0091] Specifically, the base station may include units configured to execute the method in either of the first aspect or possible implementations of the first aspect.
[0092] According to a sixth aspect, a terminal device is provided, in which the terminal device is configured to implement the method in any of the second aspect or possible implementations of the second aspect.
[0093] Specifically, the terminal device may include units configured to execute the method in either of the second aspect or possible implementations of the second aspect.
[0094] According to a seventh aspect, a terminal device is provided, in which the terminal device is configured to implement the method in any of the third aspects or possible implementations of the third aspect.
[0095] Specifically, the terminal device can include units configured to execute the method in any of the third aspect or possible implementations of the third aspect.
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33/138 [0096] According to an eighth aspect, a base station is provided, in which the base station is configured to implement the method in either of the fourth aspect or of the possible implementations of the fourth aspect.
[0097] Specifically, the base station can include units configured to execute the method in any of the fourth aspect or possible implementations of the fourth aspect.
[0098] According to a ninth aspect, a base station is provided and includes a processor, a transmitter and a memory, where the processor, the transmitter and the memory communicate with each other using an internal connection channel; memory is configured to store an instruction; it's the
processor is configured for run The instruction stored in memory, where the execution gives instruction stored in memory allows the station base run the
method on any of the first aspect or possible implementations of the first aspect, or execution of the instruction stored in memory allows the base station to execute the method on any of the fourth aspect and possible implementations of the fourth aspect.
[0099] According to a tenth aspect, a terminal device is provided and includes a processor, a receiver, a memory and a bus system, in which the processor, the receiver and the memory communicate with each other using an internal connection channel ; memory is configured to store an instruction; and the processor is configured to execute the instruction stored in memory, where the execution of the instruction stored in memory allows the terminal device to execute the method in
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34/138 either of the second aspect or of the possible implementations of the second aspect, or execution of the instruction stored in memory allows the terminal device to execute the method in any of the third aspect and of the possible implementations of the third aspect.
[00100] According to an eleventh aspect, a computer-readable storage medium is provided, where the computer-readable storage medium stores a program, and the program allows a base station to execute the method in any of the first aspects either of the possible implementations of the first aspect, or the program allows the base station to execute the method in either of the fourth aspect or of the possible implementations of the fourth aspect.
[00101] According to a twelfth aspect, a computer-readable storage medium is provided, in which the computer-readable storage medium stores a program, and the program allows a terminal device to execute the method in either second aspect or the possible implementations of the second aspect, or the program allows the terminal device to execute the method on any one of the third aspect or the possible implementations of the third aspect.
BRIEF DESCRIPTION OF THE DRAWINGS [00102] FIG. 1 is a schematic flow chart of a communication method according to an embodiment of the present invention;
[00103] FIG. 2 is a schematic flow chart of a communication method according to another embodiment of the present invention;
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[00104] THE FIG. 3 is one diagram schematic in grouping in wake up with an form of realization gives the present invention;[00105] THE FIG. 4 is other diagram schematic in grouping in wake up with an form of realization gives
the present invention;
[00106] FIG. 5 is another diagram schematic in grouping according to a form of realization gives
the present invention;
[00107] FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;
[00108] FIG. 7 is a schematic structural diagram of a base station according to another embodiment of the present invention.
[00109] FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
[00110] FIG. 9 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
[00111] FIG. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
[00112] FIG. 11 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
[00113] FIG. 12 is a schematic structural diagram of a base station according to another embodiment of the present invention; and
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36/138 [00114] FIG. 13 is a schematic structural diagram of a base station according to another embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS [00115] The following describes technical solutions in embodiments of the present invention with reference to the accompanying drawings.
[00116] It should be understood that the technical solutions in the embodiments of the present invention can be applied to various communications systems, for example, a wireless fidelity system (Wi-Fi), a Global Interoperability system for Access by Microwave (Worldwide Interoperability for Microwave Access, WiMAX), a Global System for Mobile Communication (Global System for Mobile Communications, GSM), a Code Division Multiple Access system (CDMA), a Wideband Code Division Multiple Access, WCDMA, a general packet radio service (GPRS), a Long Term Evolution (LTE) system, a Long Term Evolution Advanced (LTE-A) system, a Universal Mobile Telecommunications System (UMTS) and a P System ARTNERSHIPS ^3-related Generation (The 3rd Generation Partnership Project, 3GPP). This is not limited to the embodiments of the present invention. However, for ease of description, an LTE network is used as an example for description in the embodiments of the present invention.
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37/138 [00117] The embodiments of the present invention can be used in radio networks with different standards. A radio access network can include different network elements in different systems. For example, the network elements of a radio access network on a 5G network include a gNB base station; the network elements of a radio access network in Long Term Evolution (Long Term Evolution, LTE) and LTE-A include an evolved NodeB (eNodeB, eNB); and the network elements of a Wideband Code Division Multiple Access (WCDMA) radio access network in Broadband Code Division (WCDMA) include a radio network controller (Radio Network Controller, RNC) and a NodeB. Likewise, other radio networks such as Worldwide Interoperability for Microwave Access (Worldwide Interoperability for Microwave Access, WiMAX) can also use solutions similar to those in the modalities of the present invention, but only related modules in a base station system may change. This is not limited to the embodiments of the present invention. However, to facilitate description, a base station is used as an example for description in the following embodiments.
[00118] It should also be understood that in the embodiments of the present invention, the terminal device can also be referred to as user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal ), and the like. The terminal device can communicate with one or more major networks using a radio access network (Radio
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Access Network, RAN). For example, the terminal can be a mobile phone (or called a cell phone) or a computer with a communication function; for example, the terminal device may also be a portable, handheld, handheld, built-in computer or mobile vehicle device.
[00119] It should be understood that the term and / or in the embodiments of the present invention describes only one association relationship to describe associated objects and indicates that there can be three relationships. For example, A and / or B can indicate the following three cases: Only A exists, A and B exist, and only B exists. In addition, the / character in this Descriptive Report generally indicates a relationship or between associated objects.
[00120] The terms first and second in the embodiments of the present invention are used only to distinguish and do not represent a meaning of precedence or magnitude.
[00121] FIG. 1 is a schematic flow chart of a communication method 100 according to an embodiment of the present invention. As shown in FIG. 1, method 100 includes the following content.
[00122] 110. An base station transmits signals for a device terminal using n groups of ports.[00123] Each one of the n door groups includes fur minus two doors, and n is a positive integer bigger or equal to 2.[00124] Per example, the signals transmitted through the base station for O terminal device can to be
used to measure a channel coefficient of a channel to
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39/138 from each port in the n groups of ports to the terminal device. For example, signals can be reference signals.
[00125] 120. The terminal device transmits the first groups of linear combination coefficients to the base station. Correspondingly, the base station receives the first groups of linear combination coefficients transmitted by the terminal device.
[00126] Each first group of linear combination coefficients includes first linear combination coefficients of one of the door groups, at least one first group of linear combination coefficients includes at least two non-zero coefficients, the first groups of coefficients linear combinations are used to determine a first precoding matrix, s port groups are included in n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
[00127] Specifically, after receiving the signals transmitted by the base station using the n groups of ports, the terminal device can determine channel coefficients or base vectors of each group of ports by measuring the received signals, determining the first linear combination coefficients of each port group based on the channel coefficients or base vectors of each port group and then transmit the first groups of linear combination coefficients of the port groups to the base station. The port groups selected by the terminal device can be preset, or can be
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40/138 can be configured by the base station, or can be selected by the terminal device autonomously. This is not limited to this embodiment of the present invention.
[00128] It should be understood that, after receiving the first groups of linear combination coefficients, the base station can determine the first precoding matrix based on the first groups of linear combination coefficients and process data to be transmitted using the first pre-coding matrix. It should also be understood that, the base station can also process the data to be transmitted using another pre-coding matrix. This is not limited to this embodiment of the present invention.
[00129] In this embodiment of the present invention, the first groups of linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[00130] In some embodiments, after receiving the signals transmitted by the base station, the terminal device can determine that the ports on the base station side are grouped in the n groups of ports, so that the correct channel measurements and feedbacks can be carried out. For example, the base station can transmit grouping information from the n groups of ports to the terminal device, and the terminal device can determine the n groups of ports based on the information of
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41/138 grouping received from the base station. Alternatively, the terminal device can further determine the n groups of ports based on pre-stored cluster information. Optionally, the grouping information can also indicate a number of ports. The cluster information can be carried in higher layer signaling (such as RRC), or it can be carried in an access control element to the medium (MAC CE) or downlink control information (DCI).
[00131] The grouping information can indicate grouping in a plurality of ways. For example, when indicating that the number of ports is m, the grouping information can specifically indicate how ports m are grouped. For example, the grouping information indicates that there are m = 20 ports in total, where ports {1, 2, 3, ..., 10} are a group, and ports {11, 12, 13, .. ., 20} are a group. Alternatively, when indicating that the number of ports is m, the grouping information can only indicate how many groups the ports m are grouped in. Based on a predefined rule, a time frequency sequence of signals transmitted using ports m can be used to group ports m. The terminal device can determine the grouping of m ports based on the predefined grouping rule and a temperature-frequency sequence of m received signals. For example, a time-frequency sequence of signals in m = 20 ports is predefined as a first port for a 20 ^ port; and the base station indicates, using the cluster information, that there are m = 20 ports in total and m = 20
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42/138 ports are grouped into two groups. In this case, the terminal device can determine, based on the predefined grouping rule, that 10 ports corresponding to the first 10 reference signals are a group, and 10 ports corresponding to the last 10 reference signals are a group.
[00132] In some embodiments, the base station can still transmit third configuration information to the terminal device, or the terminal device transmits the third configuration information to the base station, where the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups. In other words, it can only be configured by the base station, or it can be fed back by the terminal device. It should be noted that the base station and the terminal device can preset a rule for selecting port groups, for example, selecting port groups based on a frequency-time sequence of n signal groups corresponding to the n groups ports and received by the terminal device from the base station. For example, the terminal device can first select the door groups based on a predefined rule, to calculate linear combination coefficients. Alternatively, a rule can be predefined to select port groups based on the power received from n signal groups corresponding to the n port groups and received by the terminal device from the base station. For example,
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43/138 the terminal device can select groups of ports with maximum received signal strength.
[00133] In some embodiments, the base station can still transmit the fourth configuration information of each of the n groups of ports to the terminal device; or the terminal device transmits the fourth configuration information for each of the n groups of ports to the base station. The fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients for each group of ports that are transmitted by the terminal device, and an amount of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each group of doors. In other words, the first configuration information can be configured by the base station or it can be fed back by the terminal device. The base station can perform a configuration based on historical measurement data or perform a configuration based on feedback from the terminal device.
[00134] Optionally, the frequency domain granularity of the phases and the frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports that are transmitted by the terminal device are used to indicate whether the terminal device transmits the first linear combination coefficients for each port group for each subband or transmit the first coefficients
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44/138 of linear combination of each group of ports for an entire broadband or transmits the first coefficients of linear combination of each group of ports in another frequency domain granularity.
[00135] Optionally, because the power (for example, a square module of a coefficient) of some of the linear combination coefficients is relatively low, the terminal device can select a plurality of linear combination coefficients with maximum port group power of linear combination coefficient, and feedback the selected linear combination coefficients for the base station. The base station can assume that the default settings are used for coefficients that are not fed back. Therefore, the overhead expense of feedback from the terminal device can be reduced.
[00136] Optionally, the fourth configuration information can also be used to indicate a number of coefficients in each of the first groups of linear combination coefficients transmitted by the terminal device.
[00137] The base station can configure the fourth configuration information for each port group flexibly based on the channel states. Optionally, the fourth configuration information for at least two of the n door groups is different. However, this is not limited in this embodiment of the present invention, and the fourth configuration information for the n door groups can also be the same.
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45/138 [00138] For example, if the base station determines which angle extensions on the base station side of the uplink channels of the terminal device for a group of ports are relatively large, the base station can configure first linear combination coefficients the group of ports that are transmitted by the terminal device to include a relatively large number of coefficients; or if its angle extensions are relatively small, the base station can configure the first linear combination coefficients of the door group to include a relatively small number of coefficients. If the received power of uplink signals received from a group of ports is relatively high and their angle extensions are relatively small, the base station can infer that the downlink channels corresponding to the port group mainly include paths direct. In this case, the base station can configure the first linear combination coefficients of the port to include a relatively small number of coefficients, and / or configure the first linear combination coefficients of the port group for a relatively large amount of quantized bits, and / or configure the first linear combination coefficients of the port group for broadband feedback. If the received power of signals transmitted by a group of ports is relatively high and the angle extensions are relatively large, the base station can infer that the downlink channels corresponding to the port include mainly indirect paths. In this case, the base station can configure the
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46/138 first linear combination coefficient of the port group to include a relatively large number of coefficients, and / or to configure the first linear combination coefficients of the port group to a relatively large amount of quantized bits, and / or to configure the first coefficients linear combination of the port group for subband feedback. If the received power of signals transmitted by a group of ports is relatively low, the base station can configure first linear combination coefficients of the port that are transmitted by the terminal device to include a relatively small number of coefficients.
[00139] Alternatively, the base station can make a decision based on feedback information from the terminal device. For example, the terminal device measures the energy received from reference signals or other signals transmitted by each group of ports, and downstream extensions of the transmission end angle of downlink channels from each group of ports to the terminal device. The terminal device feeds back to the base station a result of the classification of the received power and a result of the classification of the angle extensions of the signals correspondingly transmitted by each group of ports. The base station can configure at least an amount of first linear combination coefficients, an amount of quantized bits, and a frequency domain granularity based on the received power rating result and the rating of the angle extensions of the
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47/138 signs. For details, refer to the descriptions listed above. Details are not described again here.
[00140] Optionally, the terminal device can also report at least one of the power and angle extensions of the signals transmitted by each group of ports, or can report other parameters. The base station makes a decision based on a parameter reported by the terminal device.
[00141] In some embodiments, the terminal device can determine at least an amount of first linear combination coefficients from each group, an amount of quantized bits from each first group of linear combination coefficients, and a frequency domain granularity of each first group of linear combination coefficients, and recommend configurations of each first group of linear combination coefficients for the base station. For example, after the terminal device determines the received power of the signals transmitted by each group of ports and / or downlink channel angle extensions of each group of ports on the side of the base station, the terminal device can recommend the first coefficients of linear combination of a group of doors corresponding to relatively high received power and / or relatively large angle extensions should include a relatively large amount of coefficients, and that the first linear combination coefficients of a group of doors corresponding to relatively low received power and / or relatively small angle extensions should include a relatively small amount of coefficients. Then the
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48/138 base station determines the fourth configuration information based on the recommendation of the terminal device. For a specific method to determine the settings for each first group of linear combination coefficients by the terminal device, refer to the related content on the base station side in the previous descriptions. Details are not described again here.
[00142] Therefore, when separately configuring the first linear combination coefficients of each group of ports, the base station can flexibly configure an amount of coefficients included in each first group of linear combination coefficients, an amount of quantized bits of coefficients, one
granularity in domain frequency, and similar. That can reduce at overloads device feedback terminal.[00143] THE FIG. 2 it is a flowchart schematic of a
communication method 200 according to an embodiment of the present invention. As shown in FIG. 2, method 200 includes the following content.
[00144] 210. A base station transmits reference signals to a terminal device using n groups of ports.
[00145] Each of the n door groups includes at least two doors, and n is a positive integer greater than or equal to 2.
[00146] For example, the signals transmitted by the base station to the terminal device can be used to measure a channel coefficient of a channel to
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49/138 from each port in the n groups of ports to the terminal device.
[00147] 220. The terminal device transmits the first groups of linear combination coefficients, base vector information, and second linear combination coefficients, wherein the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are determined based on the measurement results of the reference signals of the n groups of doors. Correspondingly, the base station receives the first groups of linear combination coefficients, the base vector information, and the second linear combination coefficients transmitted by the terminal device.
[00148] The first groups of linear combination coefficients are the first linear combination coefficients of the selected door groups of n door groups, and are used to perform linear combinations in the door groups, where an x-th door in a first group of doors is linearly combined with an x2th door in a second group of doors to an xth door in an sth port group in the s door groups, 1 <x _w <p, 1 <w <s , 2 <s ú n, ex _w , w, es are integers; and the base vector information and the second linear combination coefficients are determined based on the first groups of linear combination coefficients and the measurement results of the reference signals of the n door groups, the base vector information is used to indicate at least two base vectors, the second linear combination coefficients are used to
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50/138 perform linear combination on at least two base vectors, and the first groups of linear combination coefficients, at least two base vectors and second linear combination coefficients are used to determine a pre-coding matrix .
[00149] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information, and the second linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[00150] Optionally, the xl-th port in the first group of ports, and the x2-th port in the second group of ports for the xs-th port in the s-th port group in the s port groups correspond to the same antenna . It should be
notice that, values in Xl, X2, ..., X _S can be equals or many different .This no is limited in this form in realization gives gift invention. Per example, using s = 3 for example, an first door in the first group in
doors, a first door in the second group of doors, and a first door in the third group of doors correspond to the same antenna. Alternatively, a first door in the first group of doors, a third door in the second group of doors, and a second door in the third group of doors correspond to the same antenna.
[00151] Optionally, communication method 200 may also include: the terminal device transmits a CQI channel quality indicator, where the CQI is
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51/138 determined based on port identifiers in the groups and a matrix W, and the matrix W satisfies the following expression:
W = W3 * Wi * W2, where W3 is a matrix including the first linear combination coefficient groups, Wi is a matrix including the at least two base vectors, and W2 is a matrix including the second linear combination coefficients .
[00152] Optionally, communication method 200 may also include:
the terminal device transmits a CQI, where the CQI is determined based on a W matrix, and the W matrix satisfies the following expression:
w = w ₄ * W ₃ * Wi * W2, Where W ₄ is a matrix used for indicate identifiers in doors us groups s, W3 is matrix
including the first linear combination coefficient groups, Wi is a matrix that includes the at least two base vectors, and W2 is a matrix including the second linear combination coefficients.
[00153] For expressions of Wi, W2, W3 and W ₄ , see the related content in the following embodiment 3. Details are not described here.
[00154] Optionally, the communication method 200 can also include: the terminal device transmits indication information, where the indication information includes the port identifiers in the groups. In this way, the terminal device can notify the base station of the selected port groups from the n groups
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52/138 ports. It should be noted that a value of s can also be configured by the base station for the terminal device.
[00155] Optionally, a feedback frequency domain granularity and / or a quantized bit quantity for each of the first groups of linear combination coefficients is / is different from a feedback frequency domain granularity and / or a amount of quantized bits of each second combination coefficient, and the frequency domain granularity of feedback includes at least one of a broadband feedback, a sub-band feedback, and a partial bandwidth feedback.
[00156] It should be understood that the granularity of the feedback frequency domain and / or the quantity of quantized bits of each of the first groups of linear combination coefficients and the granularity of the feedback frequency domain and / or the number of quantized bits of each second linear combination coefficient can be predefined or can be configured by the base station.
[00157] In some implementations, the granularity of the feedback frequency domain of each of the first groups of linear combination coefficients is broadband feedback, and the granularity of the feedback frequency domain of each second linear combination coefficient. is sub-band feedback, or partial bandwidth feedback.
[00158] In some embodiments, a number of quantized bits of amplitudes for each of the first groups of linear combination coefficients
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53/138 is greater than or equal to a quantity of quantized bits of an amplitude for each second linear combination coefficient; and / or an amount of quantized bits of phases for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of a phase of each second linear combination coefficient.
[00159] Optionally, the base station can also configure a group of base vectors from each of the n groups of ports for the terminal device. In some embodiments, the base vectors used by the terminal device to determine IR according to groups of coefficients of linear combinations and the base vector information are selected from the group of base vectors. As an appropriate base vector group is configured, the feedback overloads of the terminal device can be reduced.
[00160] Optionally, before the terminal device determines the first groups of coefficients of linear combinations, the communication method 200 may further include: the base station transmits grouping information of the n groups of ports. Correspondingly, the terminal device receives the cluster information. The cluster information is similar to the cluster information in communication method 100, and is not described here again.
[00161] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are transmitted
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54/138 to the base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[00162] The following uses embodiment 1 and embodiment 2 as an example to describe communication method 100 according to an embodiment of the present invention, and uses embodiment 3 as an example to describe the method of communication 200 according to an embodiment of the present invention.
Embodiment 1 [00163] A base station determines the m ports used to transmit reference signals, where a reference signal from each port is pre-encoded using a Ui pre-coding matrix. It can be assumed that each precoding matrix Ui is a vector with N * 1 dimensions. There may be a plurality of precoding vector shapes, for example, a discrete Fourier Transform vector (Discrete Fourier Transform, DFT) . The base station determines m reference signals (such as CSI-RSs) si, ..., s _m , where m CSI-RSs can be in a plurality of forms, for example, they can be fixed value strings that are orthogonal each other, or pseudo-random sequences, or in other forms. CSI-RSs can be pre-defined, and are known by the base station and a terminal device. The base station multiplies m pre-coding matrices separately by m reference signals to obtain m pre-coded reference signals: si '= ui * 31, ..., Sm' ⁼ Um * Sm ·
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55/138 [00164] When transmitting the m reference signals, the base station can group a plurality of ports into two groups of ports based on an antenna polarization direction, that is, n = 2, as shown in FIG . 3. A first group of reference signals is transmitted by mo = m / 2 ports in a first polarization direction, and a second group of reference signals is transmitted by mo = m / 2 ports in a second polarization direction. The base station can also transmit grouping information for n door groups, where the grouping information is used to indicate a quantity m and a door grouping. Correspondingly, the terminal device can receive the cluster information from the base station.
[00165] Then, the base station transmits the m reference signals on the m ports. Correspondingly, the terminal device can receive the reference signals from the base station.
[00166] For example, the terminal device can obtain channel coefficients Hi = H * ui, ..., H_mo = H * u_mo by estimating when measuring the reference signals of a first group of ports, where H is a downlink channel matrix from the first group of ports to the terminal device, and the dimensions are M * N. Likewise, the terminal device can measure reference signals by hand from a second group of ports and estimate the coefficients of channel Gi = G * u_mo + 1 ..., G_mo = G * u_m, where G is a downlink channel matrix from the second group of ports to the terminal device and the dimensions are Μ * N. The coefficients channel can
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56/138 reflect a plurality of types of downlink channel information. For example, ui and U2 in this embodiment of the present invention are two DFT vectors whose dimensions are N * 1. In this case, power | Hi | ² and | H2 | ² of the channel coefficients Hi and H2 represent the power of the downlink channel matrix H in the spatial angle directions represented by ui and U2. | Hi | ² > | H2 | ² represents that in a real H channel matrix, more power is distributed at a spatial angle represented by a precoding matrix ui.
[00167] However, as the number of m ports is limited, only the power distribution of a real channel at a limited spatial angle can be obtained based on the channel coefficients of the m ports. If a spatial location of the terminal device is exactly between spatial angles represented by two pre-coding arrays, if the terminal device feeds a channel coefficient from any port, a data transmission rate is impaired and / or the transmission reliability is impaired.
[00168] Therefore, in this embodiment of the present invention, the linear combination can be performed on the transmission coefficients of each group of doors. For example, the linear combination is performed on a first group of channel coefficients Hi ,. „, H_mo. To be specific, the first linear combination coefficients (ai, ..., a_mo) are selected to combine channel coefficients in the first group into a new channel coefficient H '= ai * Hi + ... + a_mo * H_mo. The new channel coefficient H 'is a product of the channel matrix of
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57/138 downlink H and a new pre-coding matrix u, where u = ai * ui + ... + a_mo * u_mo. | h '| ² represents the power of H in a spatial angle direction represented by u. In this embodiment of the present invention, the linear combination coefficients (al, ..., a_mo) are selected accordingly, so that a spatial angle represented by u can correspond exactly to a spatial angle in which the terminal device is located, and that the terminal device obtains a channel measurement result that best corresponds to an actual channel of the terminal device. Likewise, the first coefficients of linear combinations (bi, ..., b_mo) of a second channel coefficient of the group Gl, ... G_mo can be obtained. Then, the terminal device can transmit the first s = 2 groups of linear combination coefficients (ai, ..., a_mo) and (bi, ..., b_mo) to the base station.
[00169] The base station can use the s = 2 first groups of linear combination coefficients (ai, ..., a_mo) and (bi, ..., b_mo) received from the terminal device to form a new matrix of pre-coding, to precode and transmit data, so that a data transmission rate from the base station to the terminal device can be increased.
[00170] Optionally, the terminal device can select mi ports from mo ports in each of the n = 2 groups of ports, and feed back the selected mi ports and corresponding first coefficients of the linear combination, where mi is a lower positive integer or equal to mo and greater than or equal to 2. For example, the terminal device must select mi ports
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58/138 with higher power received from RSRP reference signal (reference signal receiving power) measuring reference signals from mo ports in the first polarization direction and selecting mi ports with higher RSRP measuring reference mo signals in the second polarization direction. Alternatively, by measuring other parameters, for example, the reference signal received with RSRQ quality (reference signal received quality), the terminal device can select mi ports with higher RSRQ separately from the ports in the two polarization directions.
[00171] After selecting mi ports of mo ports separately in the two polarization directions, the terminal device can perform a linear combination on the channel coefficients of the selected ports. For example, if the terminal device selects a first port for a mlth port from the ports in the first polarization direction and in the second polarization direction, the terminal device can perform a linear combination on a first group of Hi channel coefficients ,. „, H_mi, ie select first linear combination coefficients (ai, ..., a_mi) to combine channel coefficients in the first group into a new channel coefficient H '= ai * Hi + ... + a_mo * H_mi. The new channel coefficient H 'is a product of the downlink channel matrix H and a new precoding matrix u, where u = ai * ui + ... + a_mo * u_mi. | H '| ² represents the power of H in a spatial angle direction represented by u. In this embodiment of the present invention, the coefficients of the linear combination (ai, ...,
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59/138 a_mi) are appropriately selected, so that a spatial angle represented by u can correspond exactly to a spatial angle in which the terminal device is located, and that the terminal device obtains a channel measurement result that best matches to a real channel of the terminal device. Likewise, the first coefficients of the linear combination (bi,..., B_mi) of a second group of coefficients of channels Gi, ... G_mi can be obtained. Then, the terminal device can transmit the first s = 2 groups of linear combination coefficients (ai, ..., a_mi) and (bi, ..., b_mi) to the base station.
[00172] The base station can use the s = 2 first groups of linear combination coefficients (ai, ..., a_mi) and (bi, ..., b_mi) received from the terminal device to form a new matrix of pre-coding, to precode and transmit data, so that a data transmission rate from the base station to the terminal device can be increased.
[00173] It should be noted that, there are a plurality of methods for calculating the first linear combination coefficients (ai, ..., a_mo) and (bi, ..., b_mo) by the terminal device. This is not limited in this embodiment of the present invention. The following describes how to obtain the first linear combination coefficients using an example in which mo is equal to mi.
[00174] For example, for a data transmission channel, when an RI rating indicator is equal to 1, the terminal device estimates a channel coefficient X when measuring reference signals:
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60/138
X = [Η * ui, ..., Η * u_mo, G * u_mo + 1, ..., G * u_m].
[00175] Then, the terminal device can obtain a right primary singular vector x = [vi, ..., v_mo, ui, ..., u_mo] of X by performing a singular value decomposition in the X channel coefficient or using other methods. (vi, ..., v_mo) can be used as first linear combination coefficients (ai, ..., a_mo) of the first group of doors, and (ui, ..., u_mo) can be used as first coefficients of linear combination (bi, ..., b_mo) of the second door group.
[00176] Optionally, (vi, ..., v_mo) and (ui, ..., u_mo) can be further quantized, and the two groups of quantized coefficients are used as first linear combination coefficients (ai, ... , a_mo) of the first group of doors and first coefficients of linear combinations (bi, ..., b_mo) of the second group of doors, respectively.
[00177] In addition, a corresponding channel quality indicator (Channel Quality Indicator, CQI) can be obtained after the linear combination is performed on the channel coefficients using the first s = 2 groups of linear combination coefficients.
[00178] It should be understood that, an objective of the previous method of obtaining is to obtain the first s = 2 groups of coefficients of linear combinations to maximize a channel capacity of a data channel when RI = 1. When RI> 1, the methods for calculating the first linear combination coefficients for each port group are similar and differ only when each port group transmits data from the RI layer to the
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61/138 terminal device simultaneously. The terminal device can first determine the data line combination coefficients for each layer of each group of ports separately. For example, when RI = 2, the terminal device estimates an X channel coefficient when measuring m reference signals:
X = [H * ui,. . ., H * u_mo, G * u_mo + 1,, G * u_m].
[00179] Then the terminal device can obtain two single primary vectors right xl = [vi, ..., v_mo, ui, ..., u_mo] and x2 == [wi,. . ., w_mo, zi ,. „, z_mo] of X performing when performing singular value decomposition in the channel coefficient X or using other methods. (vi, ..., v_mo) can be used as first coefficients of linear combination of first layer data from the first group of doors; (ui, ..., u_mo) can be used as first coefficients of linear combination of first layer data from the second group of doors; (wi, ..., w_mo> can be used as first linear combination coefficients of the second layer data of the first group of doors; and (zi ,. „, z_mo) can be used as first linear combination coefficients of data of second layer of the second door group.
[00180] Optionally, (vi, ..., v_mo) and (ui, ..., u_mo) can be further quantized, and the two quantized vectors are used as first linear combination coefficients of the first layer data of the first group of doors and first linear combination coefficients of the first layer data of the second group of doors, respectively; (wi ,. „, w_mo) and (zi ,.„, z_mo) are quantized, and the two quantized vectors are used
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62/138 as the first linear combination coefficients of the second layer data of the first door group and the first linear combination coefficients of the second layer data of the second door group, respectively.
[00181] The following describes how to obtain the first linear combination coefficients using an example where mo is greater than mi.
[00182] For example, for a data transmission channel, when an RI rating indicator is equal to 1, the terminal device estimates a channel coefficient X when measuring m reference signals:
X = [H * ui, ..., H * u_mo, G * u_ (mo + 1), ..., G * u_m].
[00183] The terminal device then selects the my ports. For example, the ports selected by the terminal device in both polarization directions are the first port for the mlth port. After selecting my ports, the terminal device determines a channel coefficient X ':
X '= [H * ui, ..., H * u_mi, G * u_ (mo + 1),. . . , G * u_ (mo + im)] (1.3) [00184] The terminal device can obtain a right primary singular vector x = [vi, ..., v_mi, ui, ..., u_mi] of X 'when performing a singular value decomposition in the channel coefficient X 'or using other methods. (vi, ..., v_mi) can be used as first linear combination coefficients (ai, ..., a_mi) of the first group of doors, and (ui, ..., u_mi) can be used as first coefficients of linear combination (bi, ..., b_mi) of the second door group.
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63/138 [00185] Optionally, (vi, ..., v_mi) and (ui, ..., u_mi) can be further quantized, and the two groups of quantized coefficients are used as first linear combination coefficients (ai, ..., a_mo) of the first group of doors and first coefficients of linear combinations (bi, ..., b_mo) of the second group of doors, respectively.
[00186] In addition, a corresponding channel quality indicator (Channel Quality Indicator, CQI) can be obtained after the linear combination is performed on the channel coefficients using the first s = 2 groups of linear combination coefficients.
[00187] It should be understood that an objective of the previous method of obtaining is to obtain the first s = 2 groups of coefficients of linear combinations to maximize a channel capacity of a data channel when RI = 1. When RI> 1, the methods for calculating the first linear combination coefficients for each port group are similar, and differ only when each port group transmits RI layer data to the terminal device simultaneously. The terminal device can determine the first linear data combination coefficients for each layer of each port group separately. For example, when RI = 2, the terminal device can obtain two right single primary vectors xl = [vi, ..., v_mi, ui, ..., u_mi] and X2 = [wi,. . ., w_mi, zi ,. „, z_mi] of X when performing a single value decomposition on the channel coefficient X or using other methods. (vi, ..., v_mi) can be used as first coefficients of linear combination of first data
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64/138 layer of the first group of doors; (ui, ..., u_mi) can be used as first coefficients of linear combination of first layer data from the second group of doors; (wi, .. w_mi) can be used as the first linear combination coefficients of the second layer data of the first group of ports; and (zi ,. „, z_mi) can be used as first coefficients of linear combination of second layer data from the second group of doors.
[00188] Optionally, (vi, ..., v_mi) and (ui, ..., u_mi) can be further quantized, and the two quantized vectors are used as first linear combination coefficients of the first layer data of the first group of doors and first linear combination coefficients of the first layer data of the second group of doors, respectively; (wi ,. „, w_mi) and (zi ,.„, z_mi) are quantized, and the two quantized vectors are used as the first linear combination coefficients of the second layer data of the first door group and the first linear combination coefficients of the second layer data from the second port group, respectively.
[00189] When comparing CQIs in cases of different Ris, the terminal device can report an IR corresponding to a higher CQI and first linear combination coefficients for the data channel. In addition, the
precise terminal device still report the numbers of ml selected ports. [00190] Therefore, the s first groups in combination coefficients linear include groups in
linear combination coefficients RI.
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65/138 [00191] After receiving the first groups of linear combination coefficients reported by the terminal device, the base station can also determine a W2 code book corresponding to the first groups of linear combination coefficients.
[00192] Optionally, a structure of the W2 codebook structure can be expressed as:
^C l, 2 ^C 1.7V, (1.4) ^C 2.2 ^C 1.7V_ f represents coefficients of linear combinations corresponding to the mi gates where ^C l, l ^c 2.1 selected in the first polarization direction, in a tenth group of coefficient in the first coefficient of linear combination, and ^c 2, r ⁼ [ ^c 2, r, i '···' ^c 2, r, mj f represents the coefficients of the linear combination corresponding to the selected gates in the second direction of polarization, in the r-th coefficient group in the first linear combination coefficient group, where r - l, ..., RI and RI is a positive integer greater than or equal to 1.
[00193] A granularity in the frequency domain (such as broadband feedback, subband feedback or partial bandwidth feedback) of each first group of linear combination coefficients can be configured by the base station or recommended by the device terminal. A number of quantized bits of amplitudes and a number of quantized bits of phases of the first group of linear combination coefficients can be configured by the base station, or recommended by the terminal device.
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66/138 m _n where £, · represents length is mi other elements an i-th m _n in £, · [00194] Optionally, the numbers of mi ports reported by the terminal device can also be indicated in the form of a book codes. For example, an indication of the mi ports is expressed as a Wi codebook, and a structure of the Wi codebook is:
m _n m _n m _n ^β π2 (1) ' ^β π2 (2) ···' ^β π ₂ (/ η ₁ ) _] a column vector whose m ₀ element in is 1, all are 0, ^ ( j) e = l, ..., m ₀ ) represents the port numbers selected in the first group of ports and {l, 2, ..., m ₀ } (j = 1, ..., m ₀ ) represents port numbers selected in the second port group.
[00195] Optionally, the Wi code book can be reported in a broadband manner. Optionally, the codebook Wi can be displayed in a long-term manner, and a reporting period is longer than a reporting period of the codebook W2. Optionally, the W2 codebook is reported in a sub-band manner.
[00196] Optionally, the terminal device can perform reports based on a double codebook structure. In this case, a report form can also be a code book structure for a Wi and W2 product. To be more specific, the port numbers selected from terminal device reports and the first groups of linear coefficient combinations when reporting a Wi * W2 from the codebook.
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67/138 [00197] Wi codes
Optionally, after receiving the
W2 reported by the terminal device, the base station can determine a first pre-coding matrix used for data transmission.
For example, the first P precoding matrix can satisfy the following expression:
w, w ₂ [00198] Optionally, with reference to Wi * W2 code books reported by a plurality of terminal devices, the base station can also exhaustively decide on a first pre-coding matrix applied to the data of each terminal device.
[00199] Optionally, the terminal device can calculate a CQI based on the Wi * W2 codebook and measured channel coefficients of m ports.
[00200] It should also be understood that, this embodiment of the present invention is not limited to the previous method of obtaining. For example, for different channels, the objectives of obtaining the first linear combination coefficients can also be other objectives. For example, because a transmission solution for a downlink control channel is transmitting diversity, an objective of selecting the first groups of linear combination coefficients can maximize the signal-to-noise ratio in signal detection.
[00201] In other words, the objectives of obtaining the first linear combination coefficients may vary
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68/138 depending on the different types of channels and data transmission modes. For example, an objective of obtaining the first linear combination coefficients may be to maximize a signal-to-noise ratio in the detection of data or to maximize an equivalent channel capacity. In this way, a principle of obtaining linear combination coefficients can be changed flexibly for different types of channels and / or requirements of different transmission modes, in order to implement a flexible pre-coding project for later data transmission.
Embodiment 2 [00202] A base station groups m = 8 ports into n = 2 groups of ports, where each group of ports corresponds to a pre - coding matrix, as shown in FIG. 4. The reference signals of each group of ports, after being pre-coded, are transmitted by antennas of each group of ports.
[00203] The base station transmits reference signals at the m ports, where the reference signals are used by a terminal device to perform channel measurements.
[00204] The terminal device can obtain, by estimate, the H and G channel matrices of the downlink channels from two groups of ports for the terminal device when measuring the m reference signals, where the dimensions of both matrices they are mo * 4 and mo is a number of antennas of the terminal device. The terminal device performs a decomposition of singular values in the channel matrices corresponding to the two groups of ports separately to obtain an auto vector
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69/138 primary vi of H and a primary auto vector V2 of G, where both vl and v2 are vectors whose dimensions are 4 * 1 [00205] Optionally, the terminal device can first calculate the equivalent channels H_eff and G_eff of the two groups of gates, and perform singular value decomposition or other calculation in a composite channel F = [H_eff G_eff], to obtain a primary auto vector u, where u = (ui, U2), and is a vector whose dimensions are 2 * 1 , and includes two complex numbers ui and U2. (ui, U2) are second coefficients of the linear combination. H_eff = H * vi, G_eff = G * V2 and H_eff and G_eff are separate vectors of dimension m * 1.
[00206] Then, the terminal device determines, based on a group of base vectors of each group of doors and primary auto vectors (vl, v2) of each group of doors, base vectors selected from the group of base vectors from each group of doors, obtains first linear combination coefficients (ai,.., a_oi) from a first group of doors based on base vectors selected from the first group of doors, and obtains first linear combination coefficients (bi ,. .., b_O2) of a second group of ports based on the base vector information selected from the second group of ports. Optionally, the first coefficients of the linear combination (ai,..., A_oi) and (bi,..., B_O2) can be quantized or may not be quantized.
[00207] Optionally, the terminal device can also determine first, based on a group of base vectors of each group of doors and primary auto vectors (vl, v2) of each group of doors, base vectors
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70/138 selected from the base vector group of each door group, obtain first linear combination coefficients (ai, ..., a_oi) of a first door group based on base vectors selected from the first door group, and to obtain first linear combination coefficients (bi, ..., b_o ₂ ) of a second group of doors based on selected base vector information from the second group of doors. Optionally, the first linear combination coefficients (ai,..., A_oi) and (bi,..., B_O2) can be quantized or may not be quantized.
[00208] Then the terminal device calculates the equivalent channels H_eff and G_eff for the two port groups, where H_eff = H * wi, G_eff = G * w ₂ , wi is a precoding vector that is obtained after the linear combination is executed on the selected base vectors of the first group of doors using the first linear combination coefficients of the first group of doors, and w ₂ represents a precoding vector that is obtained after linear combination is performed on the selected base vectors of the second door group using the first linear combination coefficients of the second door group. Optionally, wi and w ₂ can also be obtained in other ways.
[00209] Based on the H_eff and G_eff that were obtained, the terminal device performs a single value decomposition or other calculation in a composite channel F = [H_eff G_eff], to obtain a primary vector u, where u = (ui, u ₂ ) and is a vector whose dimensions are 2 * 1, and includes two complex numbers ui and U2. The (ui, u ₂ ) quantified or not
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71/138 quantized are second coefficients of the linear combination.
[00210] The terminal device transmits s = 2 first groups of linear combination coefficients, s second linear combination coefficients, and base vector information for the base station, where the base vector information can be used to indicate vectors of base of each of the door groups. For example, the base vector information may include indication information (pi, ..., p_O2) of the base vectors selected from the first group of ports and indication information (qi ,. „, q_o ₂ ) of the base vectors selected from the second door group.
[00211] The base station can determine the base vectors for each group of doors based on the information in the base vector and perform a linear combination on the base vectors of each group of doors using each first group of linear combination coefficients to generate a second pre-coding matrix for each port group. Then, the linear combination is performed on the second pre-coding matrices of the door groups using the second linear combination coefficients, to obtain a first pre-coding matrix. For subsequent data transmission, the base station can use the first pre-coding matrix to precode data, and this can increase the data transmission rate and / or improve the transmission reliability. The base station can also obtain the first precoding matrix in other ways. This is not limited here.
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72/138 [00212] Optionally, the base station can also transmit the first configuration information to the terminal device, or the terminal device transmits the first configuration information to the base station. The first configuration information is used to indicate at least a frequency domain granularity of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient, and an amount of quantized bits of the phase and an amount of quantified bits of the amplitude of each second linear combination coefficient.
[00213] Optionally, the base station can also transmit the second configuration information of each of the n groups of ports to the terminal device; or the terminal device transmits the second configuration information from each of the n groups of ports to the base station. The second configuration information is used to indicate a base vector group for each port group. Optionally, the base station can configure the second configuration information for each of the n groups of ports separately.
[00214] In some embodiments, the base vectors used by the terminal device to determine the first linear combination coefficients for each group of doors are selected from the group of base vectors indicated by the second configuration information. The base vector information transmitted by the terminal device to the base station can be used to indicate the base vectors selected from each group of ports. For example, the vector information of
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73/138 base can be used to indicate the location of the selected base vectors from each group of doors in the group of base vectors, or the base vector information can be used to indicate identifiers of the selected base vectors from each group of doors.
[00215] Optionally, the terminal device can also calculate a CQI based on the composite channel F and the second linear combination coefficients (ui, U2) · For example, in a SU-MIMO transmission hypothesis, a pre-coding matrix is designed for data based on F and (ui, U2), and a received signal-to-noise ratio is a function of F and (ui, U2) · The CQI can be calculated based on the received signal-to-noise ratio. The terminal device can then transmit the CQI to the base station.
[00216] The preceding calculation is designed for RI = 1. When RI> 1, the methods for calculating the first coefficients of linear combination, the second coefficients of linear combination, and a corresponding CQI are similar, and differ in that the channels of RI data exists from each port group to the terminal device, and the terminal device can separately determine first linear combination coefficients of data from each of the RI layers corresponding to each port group, and second groups of linear combination coefficients IR (each second group of linear combination coefficients includes second linear combination coefficients). When comparing CQIs in the case of different IR values, the terminal device can select an IR corresponding to a higher CQI, report a first group of combination coefficients
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74/138 corresponding linear and a second linear combination coefficient, and report the corresponding RI value and CQI.
[00217] It should be noted that the signals from each group of ports are transmitted using antennas in the same polarization direction. To be specific, each group of ports corresponds to the same polarization direction of the antennas.
[00218] Alternatively, the signals from each group of ports can still be transmitted using antennas in two directions of polarization. To be specific, each group of ports corresponds to two antenna polarization directions. In this case, the corresponding ports for different antenna polarization directions in each port group can also be grouped into different subgroups. As shown in FIG. 5, a port 1 and a port 2 corresponding to an antenna in a first direction of polarization in a first group of ports can be used as a first subgroup, and a port 3 and a port 4 corresponding to an antenna in a second direction of polarization are used as a second subgroup. A second group of doors is similar to this.
[00219] In the preceding descriptions, the base station
group m = 8 ports in two groups in doors, Where each group in ports corresponds to an matrix in pre- coding In a real system, The season base can
group m = 8 doors into n door groups, where n is a positive divisor of m. The reference signals of each group of ports, after being pre-coded, are transmitted by antennas of each group of ports. An
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75/138 pre-coding matrix for a jth port group is Uj, where j = 1,. . ., η. The base station transmits m reference signals at m ports, where m reference signals are used by the terminal device to perform channel measurements.
[00220] The terminal device can obtain, through estimation by measuring the m reference signals, a channel matrix of downlink channels from each group of ports to the terminal device. The terminal device can select the door groups from the n door groups, measuring some parameters, where s is a positive integer less than or equal to n. Optionally, the terminal device can select the groups of ports with the highest RSRP by measuring the received RSRP (reference signal received power) power from each group of ports. Optionally, the terminal device can also select port groups with the highest RSRQ, measuring the received RSRQ reference signal quality (reference signal received quality) from each port group. The selection of s can be recommended by the UE, or can be configured by the base station when transmitting signaling.
[00221] When selecting the door groups, the terminal device can use the previous method to calculate the first linear and linear combination coefficients
THE seconds coefficients linear combination From s groups in doors. Form in realization 3 [00222] The station base groups m doors in n groups in doors, where each group of doors includes p ± doors, and pi + P2 +. . . + Pn = m. In this embodiment, Pi = p = m / n
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76/138 is used as an example for description. In each group of ports, the same number of antenna ports in two polarization directions can be included, or p ports in the same polarization direction can be included. Each door group corresponds to a pre-coding matrix. As shown in FIG. 5, m = 8en = 2. The reference signals of each group of ports, after being pre-coded, are transmitted by antennas of each group of ports. A pre-coding matrix for a tenth port group is Uj, where j = 1,. . ., n. Between p doors in each door group, an xl-th door in a first door group and an x2-th door in a second door group for an xn-th door in an nth door group correspond to the same x physical antennas or transceiver units (transceiver unit, TRX). For example, in a simpler case it is: an i-th port in each port group corresponds to the same x physical antennas or TXRUs. Without loss of generality, the following content in this embodiment of the present invention is described by means of an example in which an i-th (i = 1,..., 4) port in each port group corresponds to the same x antennas physical or TXRUs. For a more general case where a port corresponds to an antenna, the solution in this embodiment of the present invention is still applicable.
[00223] The base station transmits m reference signals at m ports, where m reference signals are used by a terminal device to perform channel measurements.
[00224] The terminal device measures the reference signals of the n groups of doors, selects the s groups of
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77/138 doors of the n groups of doors, and informs an indication of the s groups of doors, where s is a positive integer less than or equal to n. Optionally, the terminal can select the groups of ports with the highest RSRP by measuring the received RSRP reference signal power (reference signal received power) from each group of ports. Optionally, the terminal device can also select port groups with the highest RSRQ, measuring the received RSRQ reference signal quality (reference signal received quality) from each port group. A value of s can be recommended by the UE, or it can be configured by the base station by signaling transmission. This embodiment is described using an example in which the UE selects a first group of doors and a second group of doors, i.e., s = 2.
[00225] It is assumed that the channel matrices of downlink channels from two groups of ports selected by the UE for the terminal device are expressed as Η = [Hi, H2, H3, H ₄ ] and G = [Gi , G2, G3, G ₄ ], whose dimensions are both ro * 4, where ro is a number of antennas of the terminal device. Hi (i = 1, ..., 4) is a downlink channel matrix from a nth port in the first port group to the terminal device, and the downlink channel matrix Hi is a product of a physical downlink channel matrix Ηο, ί from x (x is a positive integer) antennas or TXRUs corresponding to the i-th port for the terminal device and a corresponding pre-coding matrix ui. To be specific, Hi = H _o , i * ui and ui is a column vector whose length is x, where i = 1, ..., 4. In the first group of
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78/138 ports, a first port and a second port are ports (corresponding to a port 1 and a port 2 in Figure 5) in a first polarization direction, that is, the first port and the second port correspond to antennas in the first polarization direction; a third port and a fourth port are ports (corresponding to a port 3 and a port 4 in Figure 5) in a second direction of polarization, that is, the third port and the fourth port correspond to antennas in the second direction of polarization.
[00226] Similarly, Gi (i = 1, ..., 4) is a downlink channel matrix from a seventh port in the second port group to the terminal device, and the link channel matrix descendant Gi is a product of a physical downlink channel matrix Ηο, ί from x (x is a positive integer) corresponding antennas for the i-th port for the terminal device and a corresponding pre-coding matrix u2 . To be specific, Gi = Ho, i * U2 and U2 is a column vector whose length is x, where i = 1, ..., 4. In the second group of doors, a first door and a second door are doors ( corresponding to a port 5 and a port 6 in Figure 5) in a first polarization direction, that is, the first port and the second port correspond to antennas in the first polarization direction; a third port and a fourth port are ports (corresponding to a port 7 and a port 8 in Figure 5) in a second direction of polarization, that is, the third port and the fourth port correspond to antennas in the second direction of polarization. Therefore, an i-th (i = 1, ..., 4) door in the first group of doors and an i-th
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79/138 ports in the second group of ports correspond to the same x physical antennas or TXRUs.
[00227] After the door groups are selected, the terminal device determines and reports the first groups of linear combination coefficients. The first groups of linear combination coefficients are used to perform linear combinations in the selected groups of doors. When linear matching is performed, an xlth port in a first group of doors is linearly combined with an x2th port in a second group of doors for an xth port in an sth port group in the s groups of port, 1 <x _w <p, 1 <w <s, 2 <s ú n, ex _w , w, es are integers; and the xl-th port in the first group of ports, and x2-th port in the second group of ports for the xs-th port in the seventh port group correspond to the same antennas. As described above, the example in which an i-th (i = 1,..., 4) port in each port group corresponds to the same x physical antennas or TXRUs is used in this embodiment of the present invention; therefore, when linear matching is performed, linear matching is performed between i-th gates in all s door groups. The terminal device can obtain, based on the first groups of linear combination coefficients, the downlink channel coefficient corresponding to a group of new ports (referred to as second ports). The base station can determine, based on the first groups of linear combination coefficients reported by the terminal device and the pre-coding matrix corresponding to the
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80/138 s groups of ports, a pre-coding matrix corresponding to the second ports.
[00228] The terminal device can determine the first groups of linear combination coefficients using a plurality of methods. The following uses some examples for description.
[00229] Optionally, the terminal device obtains a first linear combination coefficient corresponding to each port in two groups of ports separately. For example, the terminal device concatenates the i-th port downlink channel arrays into two groups of ports, and performs the decomposition of the singular value into a channel array obtained by concatenating to obtain a primary vector of the channel matrix. For example, the terminal device performs the decomposition of the singular value in a downlink channel matrix [Hi Gi] obtained by concatenating those of the i-th gates into two groups of selected gates, and obtains a primary vector of the channel matrix. In addition, one (çm / F I I m / F7 I '''can be obtained «, <Z ₂ i ^ 12« 22 <z ₁₃ «23« 14 «24 where (« n (X ^ (Χ _γ3 « ₁₄ ) in the coefficient matrix are the first linear combination coefficients of the first selected group of doors (corresponding to port 1 through
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81/138 port 4 in Figure 5), and correspond respectively to the first door to the fourth door in the first group of doors; (íZ ₂₁ CÇ ₂ Cü ₂₃ CÇ ₄ ) are the first linear combination coefficients of the second group of selected doors (corresponding to door 5 to door 8 in Fig. 5), and correspond respectively to the first door to the fourth door in the second group of doors.
[00230] Optionally, the terminal device can also obtain coefficients of linear combinations of all ports in the same polarization direction in each group
of doors in one way unified. Per example, the device terminal get coefficients in combination linear to for 2 doors in the first direction in polarization In a way unified. For example, an matrix of
mean channel correlation whose dimensions are can be obtained using the following method:
for 2
ΣΙ », G,] [ff, G,] ^{ί = 1} (3.2) [00231] The terminal device performs the decomposition of eigenvalues in the mean channel correlation matrix to obtain a primary auto vector whose dimensions are ^ XÍ. In this embodiment of the present invention, s = 2. In this case, the primary auto vector obtained zy ₌ ízy zy p zy _z can be expressed as ^{L 1 2J} . ¹ and a linear combination coefficient of each door in the first direction of zy _z polling in the first group of doors, and ² and a linear combination coefficient of each door in the first direction of polarization in the second group of doors. Likewise, the linear combination coefficients of each door in the second direction of polarization in the two groups of doors
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82/138 can be obtained, and are e ^ ² respectively. Therefore, Ái) or (° ίΆ) can be referred to as linear combination coefficients of the first group of doors (corresponding to door 1 to door 4 in Figure 5), and correspond to the first door to the fourth door in the first group of doors. doors, respectively. ^ ² ^ ² ^ ² ^ , or (C 2'a) _are the linear combination coefficients of the second set of ports (port corresponding to the port 5 through 8 in Figure 5) and correspond to the first port to the fourth port on the second door group, respectively. In this case, the coefficient matrix can be expressed as:
a ₁ «2 a _l « 2


(3.3) [00232] Optionally, the terminal device can calculate the first linear combination coefficients of the door groups for a channel in each subband separately, or it can calculate the first linear combination coefficients of the door groups in one broadband. Optionally, a granularity of frequency domain amplitudes and a frequency domain granularity of first linear combination coefficients of each of the door groups can be configured by the base station transmitting configuration information, or recommended by the terminal device for the base station. Optionally, a quantity of quantized bits of the phases and a quantity of bits
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83/138 quantified of the amplitudes of the first linear combination coefficients of each of the door groups can be configured by the base station through the transmission of configuration information, or recommended by the terminal device to the base station.
[00233] Optionally, the first linear combination coefficients of the door groups can also be obtained using other methods. This is not limited here.
[00234] The terminal device can determine a W3 codebook based on the first linear combination coefficients of the s door groups.
[00235] The W3 code book can be in a plurality of forms. Optionally, the W3 code book may comprise at least one matrix whose dimensions are ^{(5/7) x} / ^7, where P is a number of ports included in each group. When the base station uses a dual polarization antenna, each group of ports can include ports in a first polarization direction and ports in a second polarization direction. Optionally, one form of each W3 code book can be expressed as:
W ₃ = where a coefficient matrix of a door corresponding to the first direction of polarization in the selected door groups, and the (sp / 2) x (p / 2). C _{2 is} dimensions of the coefficient matrix are a coefficient matrix of a door corresponding to the second direction of polarization in the selected groups of doors, and dimensions of the coefficient matrix are (sp / 2) x (p / 2) θ. , cfl = 1,2) form of 'can be expressed as:
as a
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a] ¢¢ / 2 where a vector
Ί l, w ⁵ 2, w ⁵ a coefficient a
> ^w is a linear combination coefficient of a w-th door corresponding to an i-th direction of polarization in a j-th door group in the s door groups = 1, ... / 7/2 θ
To be more specific, for the door groups selected for the i-th direction of polarization, linear combination is performed on w-th doors in the door groups separately using,, a , a , ..., a ^l,.
coefficients - ^ws - ^w , and a w-esima port in a new group of ports can be obtained, where ^w ~ '' P [00236] When the base station uses a single bias antenna, a form of the W3 codebook can be expressed as:
"1
W ₃ = where «2 (3.6) ⁼ [^ lw '^ 2w' ··· 'r
linear combination is performed on w-th doors in the door groups separately using coefficients
The. , ct, a
Ιτν ’2tv’ ’sw and a w-th port in a new group of ports can be obtained, where w =
1, ..., p.
[00237] As can be learned, the structures of the W3 codebook in expressions (3.4) and (3.5) can also be uniformly expressed in the form in (3.6).
Therefore, when the base station uses an antenna
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85/138 double polarization or a single polarization antenna, a structure of
W3 can be expressed as:
«I
W ₃ = « ₂ ^to _P
Where
1T α - CL · w 2, w ’’ s, ivJ α
[00238] Optionally, ^w
CL e can be the same or different, depending on a way to obtain coefficients of linear combination of different doors in the same group of doors, for example, several ways described above, where {1 p / 2}, ie {12} [00239 ] If the first combination coefficients α
of the doors are obtained separately, that is, ^w
CL and may not be the same, the terminal device needs α to report ^w corresponding to each w in the W3 codebook, where ^w ~ '' P, so that the base station determines the W3 codebook. Obtaining and reporting the first linear port combination coefficients separately can improve the feedback accuracy of channel status information, and provide greater freedom to form a new group of ports later. If the first linear combination coefficient for each port in the same polarization direction is the same, when reporting the W3 codebook, the terminal device will need to report only one linear combination coefficient (for example, report ·> ®i + p / 2 only ^r in (3.7)) corresponding to a port. This can reduce reporting overhead. For the same polarization direction, if the
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86/138 first linear combination coefficients of the ports are a _w a reported separately (ie e, and are not equal (X (X ^w ^ ^v )) or reported together (ie ^w and ^v are equal, where can be specified in a predefined way, or configured by the base station when transmitting configuration information, or recommended by the terminal device, transmitting configuration information.
[00240] The base station can determine, based on the first groups of linear combination coefficients, a pre-coding matrix corresponding to a new group of doors. For example, the base station uses a dual polarization antenna. It is assumed that the pre-coding matrices corresponding to the doors in the first polarization direction in the door groups selected by U,. .., U í) healthy terminal device ^{| S} respectively, and that the pre-coding matrices corresponding to the ports in the
U / i), ..., U /) second polarization ^{drain S2V} ' ^S2V ' respectively, where ^J are port identifiers corresponding to the i-th direction of polarization or in the s groups of ports, and i = «= O = ² , £, (1) = 2, £,. (2) = 4 _{indicates that} (for example, if the terminal device selects a second port group and a fourth port group from the n = 4 port groups for the i- the polarization direction). The terminal device can select the same groups of ports for two polarization directions, that is, {# 2 (1) '···'# 2 ( ⁵ )}. the base station calculates, based on a pre-coding matrix corresponding to each port group, a pre-coding matrix corresponding to each port in a new port group. For example, a pre-coding matrix corresponding to a
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87/138 w-th door between doors in the i-th direction of polarization in the new door group is the following linear combination:
^_ [ ^M g; (l) '···' ^u gi (5) _1 / 2 where ^W ~. Therefore, the base station can obtain a pre-coding matrix corresponding to each port in the new port group. Therefore, the base station performs linear combination in pre-coding matrices of the door groups using the first linear combination coefficients.
[00241] The terminal device can determine, based on the W3 code book, a downlink channel matrix corresponding to the new group of ports. Per
H ¹ H ¹ example, assuming that sw represents downlink channel coefficients of a w-th port in each port group, estimated by the terminal device for the first polarization direction in the selected port groups (the terminal device can obtain , by way of estimation, the downlink channel coefficients when measuring the reference signals transmitted by the base station), a downlink channel coefficient of a wth port in the new port group for the first polarization direction can be calculated
H * = ⁵ H * oc as ^w h ^w J ' ^w . A downlink channel array of the new port group can be expressed as:
[00242] Optionally, the W3 code book can also be in other forms. For example, if the base station
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88/138 uses a dual polarization antenna
W3 satisfies the following expression:
w ₃ = where '2

a diagonal matrix whose dimensions fe, are _one are p2xpl2 _{and elements} j-the first linear coefficient group in the first linear coefficient groups j = 1 _,. s. If the base station uses a single polarizing antenna, W3 satisfies the following expression:
W ₃ = (3.11)
Where is a diagonal matrix whose dimensions are P * P is a j-first linear combination coefficient group in the first linear combination coefficient groups, ej [00243] The method for calculating the pre-coding matrix of the new group of doors by base station using expression (3.10) or (3.11) is consistent with that using expression (3.8). The method for calculating the downlink channel coefficient of the new port group by the terminal device using the expression (3.10) or (3.11) is consistent with that using the expression (3.9).
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89/138 [00244] For the base station side, a difference between the expression (3.10) or (3.11) and the expression (3.7) is that the methods for organizing a corresponding pre-coding matrix of each group of doors by the station basis are different. For example, the base station uses a double polarized antenna, s = 2 and p = 4. It is assumed that the pre-encoding vectors of two groups of selected ports are ui and u2. If the base station virtualizes, using a matrix shown in the following (3.12), to groups of ports corresponding to the antennas or TXRUs, the base station can use the expression (3.7) to obtain a pre-coding matrix (3.13) corresponding to each port in a new port group:

(3.13) are pre-coding arrays corresponding to a first port for a fourth port in the new port group.
[00245] If the base station virtualizes, using a matrix shown in the following (3.14), to groups of ports corresponding to the antennas or TXRUs, the base station can use the expression (3.10) to obtain a pre-coding matrix (3.15) corresponding to each port in a new port group:
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90/138 where
11 ^ 112 ^ 11 ^ 11 ^ are arrays corresponding to a first port
pre-coding for a fourth port in a new port group.
[00246] Therefore, an effect of the expression (3.10) or (3.11) form is the same as an effect of the expression (3.7). From the same to the terminal device, an effect of the expression or (3.11) is also the same as an effect of the expression (3.7), that is, a downlink channel coefficient of a new group of ports indicated by the expression (3.9) can obtained, and a difference lies in a way of arranging channel coefficients of the groups of ports by the terminal device. Still using the example where the base station uses a double polarized antenna and p = 4,
Z_J 2 tj2
1.1 '^ 2.1' ^ 1.2 'the end device to use to link downlink channel coefficients of eight ports in total into two groups of selected ports, a downlink channel coefficient of a new group of ports can be obtained using the expression (3.7):
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Η = [η;, Η , Η , Hi]
IJ ² IJ ² IJ ² ZV2,2 ^'17 1,1 ^ 2,1 ^ 1,2 ^ 2,2 α ₂ [00247] If the
I / _ / 1 / _ / 1 / _ / 1 / _ / 1 / _ / - jjl tj2 [/ Ϊ11, rl _{x 2} , rl ₂ j,, rl _i2 , rl _2i
In order to use the end device to concatenate downlink channel coefficients of eight ports in total into two groups of selected ports, a downlink channel coefficient of a new port group can be obtained using the expression (3.10):
(3.17) [00248] After determining the first groups of linear combination coefficients, the terminal device can further determine the base vector information and the second linear combination coefficients.
[00249] The terminal device obtained the downlink channel coefficient of the new group of ports according to the previous method. For example, when the base station uses a double polarized antenna, the coefficient of
H = h ', H', H ² H ² Δ channel ^pp shown in expression (3.9) can be obtained. In this case, the terminal device can determine the second linear combination coefficients and the base vector information using the following method.
[00250] The terminal device performs a single value decomposition in the downlink channel matrix H from the new port group for the device
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92/138 terminal to obtain the primary auto vectors R (vi, V2, ..., vr), where R is a positive integer. Each auto vector corresponds to a data stream. For a third auto vector (r = 1, ..., R), the terminal device selects base vectors from the group of vectors and base, and reports identifiers of the selected base vectors to the base station.
[00251] The base station and the terminal device can determine a Wi code book based on the identifiers of the base vectors. The base vector group can be in the form of a base vector matrix and the base vector matrix includes 2M base vectors. The base vector can be in a plurality of forms, for example, a DFT vector.
[00252] Optionally, when the base station uses a double polarized antenna, the matrix of base vectors where a door can be expressed as:
(3.18a)
ΐ) x 2_Λ ^ a matrix whose dimensions are ¹ , a (i),
... u _M J and a matrix of base vectors corresponding to the first direction of
B - Ã ²⁾ ], polarrzamento, 2 li 2 mj _{and a} matrix of base vectors of a door corresponding to the second direction of polarization, the dimensions of both matrices are (p / 2) xM, m represents a number of vectors which can be selected, and = =. _{a base} 'Ώ / 2 whose length is ^r , for example, a DFT vector.
[00253] Optionally, array of door base vectors in two directions of polarization can be equal or
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Different D, that is, ¹ can be equal to
BO to ² . Based on basis vectors ^r ^ ² equal or not selected terminal device may determine a structure of a Wi codebook for the rth self J ¹⁾ N) ··· The í ^ (2) ^ 2 ( 1) vector:
A < ² ) ... A®% (2)% (O _f ) (3.18b) where it represents an identifier of a base vector for the i-th polarization direction reported by the terminal device for the r-th auto vector , / = ^ = 1, .., R
M = 4.0. = 2, π. ₄ (1) = π _{2 4} (1) = 2, π. ₄ (2) = ₄ (2) = 3 / = 1.2 _and
For example, they indicate that the terminal device selects from four base vectors a second base vector and a third base vector for the first polarization direction and the second polarization direction for the first auto vector.
[00254] When the base station uses a single polarizing antenna, the array of base vectors can be expressed as:
^B = [#i] (3.19a) where B is a matrix whose dimensions are ¹ and ^ 2. includes all base vectors.
Based on the selected basis vectors @ ^r, the terminal device and the base station can determine a structure of a Wi codebook for vector self rth as follows:
W1 (Ó = [ (1) (2) ··· (oj _{(3. 19b)}
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94/138 where [1,2, ..., Af} represents an identifier of a base vector selected by the UE for the rth auto vector, MU A} _and r = l, .., Ã.
Optionally, when the base station uses a dual polarization antenna, the array of base vectors can also be expressed as:
B = ^Bl _ ^B i (3.20a) where B is a matrix whose dimensions are ¹ , _B z / D a (01 b ₌ L (2) a (2) 7, (2) 1 ¹ 1 ^{1 2} mi, 2 L i 2 ··· m J, _the dimensions of the two.. ~ (P / 2) x2N b- ^B (j = 1,2, z = 1, ..., A /),., Matrices are ⁷ e '' and a base vector _z n / 2 whose length is ^r , for example, a DFT vector. Based on the selected base vectors, the terminal device and the base station can determine a structure of a Wi codebook for the r-th auto vector as follows:
aW to (i) ... to (i). a ( ² ) a ( ² ) _l aW, _λ _ a ( ² ) _a ( ² ) ... _ a (2) (3.20b) where
K _ir (j) and {1,2, -, M} 'represents an identifier of a base vector for the i-th polarization direction, reported by the terminal device for rr = 1, .., R j = 1 , ..., 0. j = 1, ..., 0 ₂ esimo auto vector, '' and · or [00255] Optionally, the structures of the base vector matrix and the code book Wi can also be of other forms and are not limited here.
[00256] Optionally, the terminal device can select base vectors for all R auto vectors of
WÍr) = W r = 1 R a unified mode, and in this case, ^1V 'i, where
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95/138 perform linear combinations in ^ _r (l) '^ _r (2)' - '^ _r (o _r ) of polarization gates in the expression (3.18b) r = 1,. . . , R.
[00258] When the station
In this case, ° ~ ⁰ , and, where j = 1, ...,
0.
[00257] The terminal device obtains a linear combination coefficient of the rth auto vector based on the first groups of linear combination coefficients and the codebook Wi. The linear combination coefficients of the RI auto vectors are the second linear combination coefficients. The terminal device reports the second linear combination coefficients. The terminal device can determine a W ₂ codebook based on the second linear combination coefficients. Optionally, when the base station uses a dual polarization antenna, W2 can be expressed as:
(3.21) a coefficient used for base vectors in the i-th direction of or (3.20b), i = 1 or 2, and base uses a single polarization antenna, a W ₂ codebook structure can
a structure of book from codrgo TIZ ^C fl ^C l, 2 ^C 1.7 / L ^C 2.1 ^C 2.2 ^C 2, RI_ T ç. _r = where [u, r, l ^C i, r, O _r J _is
be expressed as: W ₂ = [ci c ₂ ··· (3.22) c, = [c _rl , .. where ., c _o f is a vector whose dimensions are ^x ', and is used to perform linear combinations in b base vectors ^π · . (l) ' (2)' ---, (o _r ) _in expression (3.19b), and r =
1, ..., R.
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96/138 [00259] Optionally, in the W2 code book, an amplitude of each coefficient can be fed back in a broadband way or fed back in a subband way. One phase of each coefficient is fed back in a subband fashion.
[00260] The terminal device can express approximately, based on the code book Wi and the code book W2, an auto vector obtained from a channel corresponding to a new group of ports. For example, the tenth auto vector can be expressed as approximately
V = WW (r) W (r) ^r 1 2 /, where ^{2V 7} represents a r-column of W2. Because the rth vector auto is the auto vector of the corresponding channel for the new port group, and the formation of the new port group requires the W3 code book, the terminal device needs to report the Wi, W2 and W code books W3, where codebooks are used by the base station to form a second pre-coding matrix used for data transmission and correspond to a channel characteristic of the terminal device.
[00261] In addition, the terminal device still needs to report port identifiers for the selected port groups, where the identifiers are used to notify the base station of the port groups selected by the terminal device.
[00262] The terminal device can determine a W4 code book according to an indication of the port groups. For example, for the W3 codebook in expression (3.7), if the base station uses an antenna
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97/138 double polarization, code book W ₄ can be expressed in the following matrix form:
W ₄ = ^, (1), ^, (2) -, ^, (4 (3.23) where e
^J represents a column vector whose length is n, only a jth element is 1, and all
P. (l) {1 Fl other elements are 0. ^J are port identifiers corresponding to the i-th direction of polarization in the s groups of doors, where i = 1 or i = 2. ^ ^{p / 2} represents an identity matrix whose dimensions are p / 2. ® represents a Kronecker product (Kronecker product).
[00263] If the base station uses a single polarization antenna, the W ₄ codebook can be expressed in the following matrix form:
W ₄ = e ⁿ g (1), and ⁿ g (2) ..., and ⁿ _{g (s)} ] ®I _{p (3 24)} n
and where ⁷ represents a column vector whose length is N, only a jth element is 1, and all other elements are 0; # (1), - _s will be included in the first indication information and used to indicate the doors groups; represents an identity matrix whose dimensions are m; and ® represents a Kronecker product.
[00264] For code book W3 in expression (3.10) (the base station uses a double polarized antenna), code book W ₄ can be expressed in the following matrix form: yy _ l ^and gi (1), ^, (2) ---, ^and gi ( _s )] ® ^ / 2 [^ 2 (1), ^ 2 (2) -, ^ 2 (9] ® Λ> / 2 (3.25) c
where ⁷ represents a column vector whose length is N, only a jth element is 1, and all
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98/138 other elements are 0; < 2 (1) '···'< 2νν ^ε {1,2, ..., «} are included in the first indication information and are used to indicate the door groups; represents an identity matrix whose dimensions are m; and ® represents a Kronecker product.
[00265] For code book W3 in expression (3.11) (the base station uses a single polarization antenna), code book W4 can be expressed in the following matrix form:
<3.26) and ⁿ where ¹ represents a column vector whose length is n, only a jth element is 1, and all other elements are 0; < (1) '···'< ( ⁵ ) are included in the first indication information and are used to indicate the door groups; represents an identity matrix whose dimensions are m; and ® represents a Kronecker product.
[002 66] A function of the W4 code book is to select the door groups from n door groups, where the door identifier information in the selected door groups is carried in the W4 code book. The terminal device can extract channel coefficients from (m / n) * in total ports in the selected port groups from the total port channel coefficients in total in the n port groups based on code book W4. A difference between expression (3.23) and expression (3.25) is in a sequence of arranging the channel coefficients of m ports in total in the n groups of ports by the terminal device.
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99/138 [00267] For example, it is assumed that the base station uses a double polarized antenna, and that HH _n , GG ^l ' ^{F l} ' ^F represent the downlink channel coefficients of p ports in the
Η H total in a ith port group where Μ '·' gp / z ^ _{s the} p channel coefficients / 2 ports in the first direction
GG polarization, and >> p / 2 _s g _o channel coefficients for 2 ports in the second polarization direction. If the terminal device arranges the total channel coefficients of m ports as follows:
1 «,.,.-9. ,, 2. · 9„, · G „, .. 0 ,,,,, G ,, ..... G,„ J that is, according to a method of first intragroup door arrangement and then intergroup door arrangement, the terminal device selects, using the W4 code book shown in expression (3.25), channel coefficients corresponding to the door groups.
H - HW
To be specific, seiected 4, where W4 is shown in expression (3.25).
[00268] If the terminal device organizes the channel coefficients of m ports in total as follows:
ί9., .- ·· 9, .-, 9. ,, 2 .---. 9 ,,, 2.9., .- 9 ,, .-. 9,, 2 .-. 9 ,,, 2] that is, according to a method of first intergroup door arrangement and then intragroup door arrangement, the terminal device selects, using the W4 code book shown in expression (3.23), channel coefficients corresponding to the door groups.
H - HW seiected 4, where W4 is shown in expression (3.25).
[00269] In conclusion, the terminal device reports the indication information, the first groups of
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100/138 linear combination coefficients, the selected base vector and identifiers of the second linear combination coefficients. The indication information includes port identifiers in the selected port groups. In addition, the terminal device reports the CQI. When calculating the CQI, the terminal device must assume a pre-coding matrix W used by the base station to transmit data to the terminal device.
[00270]
Optionally, W can be expressed as a product of W3, Wi and W2: W = W3 * Wi * W2. In this case, the CQI is calculated based on the port identifiers in the selected port groups and W and the measured channel coefficients of the port groups. Optionally, the indication information can be expressed in the form of the code book W ₄ ; in this case, W can be expressed as: W = W ₄ * W3 * Wi * W2.
[00271]
Optionally matrix W used to calculate CQI can also be expressed as a product of two matrices: W = Wi '* W2, where W1' is a matrix including the first groups of linear combination coefficients and base vectors indicated by the vector information basic; and W2 is a matrix that includes the second linear combination coefficients, and the expression can also be as in (3.21) or (3.22).
[00272] When the base station uses a double polarized antenna, a shape of the matrix W1 'can be expressed as:
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101/138 where ôCw c; C (2>
/ ^ 'α (') r '' ¹ '/, (<) ^C 2 ° ^ .r (l) ^C 2 ^O ^ .r (2) t> » ₀₎ c> 2m cycle.>cy>, i <ÚÍj «.>
is a matrix whose
9 libZ-1, ..., CC, ^, 0 (- ,, ..., 0 (- _{/ 7} I „dragonal whose dimensions are ^zz ; ^{] Λ]} ' ^{p J} ' jp ¹ '·' _and a j - eleventh linear combination coefficient group in the first groups of combination coefficients τι., X- (n) and {1,2, ..., M} linear, where j = 1,..., S, ei = 1 or 2;
represents an identifier of a base vector included in the base vector information reported by the terminal device for the i-th direction of polarization for the tenth auto vector, where ⁿ - ^ --- O _r θ O _{r a} ί _η - | -θ-ί_ _{ΓΟ ma} i _O r or b ⁽ⁱ i = 1,2, j = 1, ..., M), equal to 2 and less or equal to M; and ⁷ and a base vector whose length is p / 2, for example, in the base vector matrix shown in expression (3.18a), for example, a DFT vector. Optionally, for the R auto vectors, the terminal device can select the same base vector, that is,
O _r = O _and ^, _r (j) = π, (j (i = 1,2, j = 1, ..., 0) [00273] When the base station uses a single polarizing antenna, a shape of the matrix Wi 'can be expressed as: -h'],
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102/138
^c > (»(2)B '=c ₂ (2) ^: Where HERE(.)(s) ^c A (v>.it's a matrix whose Xi ^c > =dimensions are psxO _r . «Λ ,. is matrix diagonal whose dimensions are pxp and5.2 · - · «^) _is a j- 1st group in coefficient in combination linear
in the first groups of linear combination coefficient, where j = 1, S; rr _r (n) and {1,2, ..., M} represents an identifier of a base vector included in the base vector information reported by the terminal device for the tenth auto vector, where ⁿ - t, -, O _r θ O _{r a} q _n t _e q _{ro ma} i _O r or b (j =, equal to 2 and less or equal to M; and ⁷ and a base vector whose length is 2, for example, in the matrix of base vector shown in expression (3.19a), for example, a DFT vector Optionally, for the R auto vectors, the terminal device can select the same base vector, that is, V = O _and *, (/) = ΗΛ (ί = UJ = 1, -. O ».
[00274] The base station determines, based on the report from the terminal device and / or reports from other terminal devices, a pre-coding matrix for data transmission to the terminal device.
[00275] Optionally, a value of s can be configured by the base station when transmitting the first configuration information, or recommended by the terminal device when transmitting the first configuration information to the base station. Optionally, the first configuration information can be used additionally
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103/138 to configure an upper limit s 's, where 2 <s' <n. In this case, a value of s that can be selected by the terminal device must satisfy 2 <s <s'. To be specific, the first configuration information configures the terminal device to select a maximum of groups of ports and report other corresponding information. A number of port group s currently selected by the terminal device may not be equal to s'. Therefore, the terminal device still needs to report an actual value of s to the base station. For example, the base station sets s' = 3, and the terminal device considers, making a measurement, that only s = 2 groups of ports need to be selected; in this case, the terminal device reports s = 2 and other information (such as indication information, first linear combination coefficients, base vector information, and second linear combination coefficients). Allowing the terminal device to report information that corresponds to fewer than groups of ports can avoid wasting transmission power from the base station in the other channel directions that contribute little to data transmission performance. The channel's directions correspond to pre-coding matrices of other groups of ports. Therefore, the base station can use the transmit power more efficiently, use pre-coding matrices corresponding to the most important port groups to form a new port group, and align with a location on the terminal device to improve the transmission performance. In addition, allowing the terminal device to report information
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104/138 corresponding to less than groups of ports can reduce the overhead of reporting the terminal device.
[00276] Optionally, the indication information (or the W4 code book) is fed back in a broadband manner. Optionally, the referral information (or the W4 codebook) is fed back in a long-term manner.
[00277] A frequency domain granularity of each of the first groups of linear combination coefficients (or the W3 codebook) can be broadband feedback, subband feedback, or width feedback. partial bandwidth, where a partial bandwidth feedback granularity is less than a broadband feedback granularity and is greater than a subband feedback granularity. Optionally, the feedback granularity can be predefined, for example, predefined as broadband feedback, or predefined as partial bandwidth feedback. Optionally, the base station can also transmit the second configuration information to the terminal device, or the terminal device transmits the second configuration information to the base station. The second configuration information is used to indicate a amplitude feedback frequency domain granularity and a phase feedback frequency domain granularity of each of the first groups of linear combination coefficients (or the W3 codebook) . The granularity of frequency domain of amplitude feedback and the granularity of frequency domain
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105/138 of phase feedback can be the same or different. For example, the granularity of the amplitude feedback frequency domain is broadband feedback, and the phase is subband feedback, or both are broadband feedback. No other feedback frequency domain granularity is excluded.
[00278] A number of quantized bits of the amplitudes and a number of quantized bits of the phases of each of the first groups of coefficients of linear combinations (or the W3 codebook) can be pre-defined or configured. For example, the amplitudes of each of the first groups of coefficients of linear combinations can be predefined as x quantized bits, and the phases can be predefined as y quantized bits. For example, x = 2 or 3, and y = 2 or 3. Other values are not excluded. Alternatively, the base station can still transmit the second configuration information, or the terminal device transmits the second configuration information to the base station. The second configuration information is used to indicate the number of quantized bits of the phases and the number of quantized bits of the amplitudes of each of the first groups of linear combination coefficients (or codebook W3).
[00279] Optionally, the second configuration information can also be used to configure either a feedback frequency domain granularity or a quantity of quantized bits of the first linear combination coefficients, or to configure only one of them. The second configuration information can also be
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106/138 used to configure a feedback frequency domain granularity and / or a quantity of quantized bits of first linear combination coefficients in different groups in the first groups of linear combination coefficients separately. Optionally, the configuration information of the feedback frequency domain granularity and configuration information of the quantity of quantized bits of the first linear combination coefficients can also be different. For example, the feedback frequency domain granularity of the first linear combination coefficients is configured by the fifth configuration information and the quantity of quantized bits is configured by the sixth configuration information. Flexible configurations of the feedback frequency domain granularity and / or the quantized bit quantity of the first linear combination coefficients can strike a compromise between improving the feedback accuracy of channel state information and reducing overloads, and improving the accuracy of feedback of channel status information under a specific overhead requirement.
[00280] Optionally, the first groups of coefficients of linear combinations (or the W3 codebook) can be fed back in a long term way, or fed back in a short term way.
[00281] Optionally, the base vector information (Wi codebook) is fed back in a broadband way or fed back in a long term way.
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107/138 [00282] Optionally, a feedback frequency domain granularity of a phase and a feedback frequency domain granularity of an amplitude of each second linear combination coefficient (or a W2 codebook) and / or a number of quantized bits of the phase and a number of quantized bits of the amplitude of a second linear combination coefficient can be predefined. Alternatively, the terminal device receives third configuration information, or the terminal device transmits the third configuration information to the base station, where the third configuration information is used to configure at least one of a phase domain frequency granularity and a frequency domain granularity is an amplitude of each second linear combination coefficient, and a quantity of quantized bits of the phase and a quantity of quantized bits of the amplitude of each second linear combination coefficient. The configuration information of the frequency domain granularity and the configuration information of the quantity of quantized bits of each second linear combination coefficient can also be different. This is similar to the method for configuring the first groups of linear combination coefficients, and is not described here again. The flexible settings of the feedback frequency domain granularity or the amount of quantized bits of each second linear combination coefficient can strike a compromise between improving the feedback accuracy of channel state information and reducing overhead, and improving accuracy feedback
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108/138 channel status information under a specific overhead requirement.
[00283] Optionally, an amplitude feedback frequency domain granularity and an amplitude feedback frequency domain granularity and / or an amount of quantized bits of the amplitudes and an amount of quantized bits of the phases of each of the first s groups of linear combination coefficients are different from those of each of the second linear combination coefficients. For example, the granularity of the feedback frequency domain of the amplitudes and / or the granularity of the feedback frequency domain of the phases of each of the first groups of linear combination coefficients can be predefined (or configured) to be greater than that of each second linear combination coefficient or the number of quantized bits of the amplitudes and / or the number of quantized bits of the phases of each of the first groups of linear combination coefficients can be predefined (or configured) to be greater than the of each second linear combination coefficient. For example, a quantity of quantized bits of a phase of each first linear combination coefficient can be predefined to be 3, and a quantity of quantized bits of a phase of each second linear combination coefficient can be predefined to be 2. Alternatively, an amount of quantized bits of an amplitude of each first linear combination coefficient and / or an amount of quantized bits of a phase of each first linear combination coefficient can be preset to be less than
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109/138 than that of each second linear combination coefficient. This certainly does not exclude that the quantities of quantized bits are the same. Under the same condition of reporting overhead, allocating different amounts of quantized bits and / or feedback frequency domain granularities to each first linear combination coefficient and each second linear combination coefficient can improve the feedback accuracy of status information and improve subsequent data transmission performance. For example, if the accuracy of the first groups of linear combination coefficients is more important to improve the feedback accuracy of channel state information, more bits can be predefined or set to characterize each first linear combination coefficient. Likewise, if the accuracy of each second linear combination coefficient is more important to improve the feedback accuracy of the channel state information, more bits can be predefined or set to characterize each second linear combination coefficient.
[00284] Optionally, the base station can also transmit fourth configuration information to the terminal device, or the terminal device transmits the fourth configuration information to the base station. The fourth configuration information is used to indicate a group of base vectors. In some embodiments, the base vectors used by the terminal device to determine the groups of the second linear combination coefficient RI and an indication of the base vector are selected from the group of the base vector indicated by the fourth
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110/138 configuration information. As an appropriate base vector group is configured, the overhead of feedback from the terminal device can be reduced.
[00285] Optionally, if W4 and W3 code books are fed back in a long-term manner, assuming, T that a feedback period (in seconds) of W _x and ', where x
T- T>T> T = 1, 2, 3 or 4, ^{4 3 1 2} . Reporting the W3 code book is based on a W4 code book that is reported last time, reporting the Wi code book is based on W4 and W3 code books being reported the last time, and reporting the W2 code book it is based on W4, W3 and Wi code books that are reported last time.
[00286] The base station determines, based on the first linear combination coefficients, a pre-coding matrix corresponding to a new group of ports. The precoding matrix can accurately align the transmission power of the base station with a spatial direction in which the terminal device is located and increase the received power of the signal from the terminal device. In addition, the base station can generate a second precoding matrix based on the coefficients of the second linear combination and the indication of the base vector, and perform precoding on the new port group using the second precoding matrix . This further increases the data transmission rate and / or improves the reliability of the transmission of R-layer data streams.
[00287] In the previous embodiment, R can be a positive integer such as 1 or 2. Optionally, based on a code book W4 * W3, the terminal device
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111/138 can determine the Wi and W2 codebooks in cases of different possible R values, and determine the corresponding CQIs. The terminal device can select an R corresponding to a higher CQI, report the corresponding Wi and W2 codebooks and report the corresponding R value and CQI. Optionally, the terminal device can also select, by comparing the received RSRP reference signal power or received RSRQ reference signal quality in cases of different possible R values, an R corresponding to the larger RSRP or RSRQ, and calculate a CQI in a case of R. Then, the terminal device can report the selected RI and the corresponding CQI. Optionally, the terminal device can also select, comparing transfer rates in the case of different possible R values, an R and a CQI corresponding to a maximum transfer rate to report. The reported R is a ranking indicator (Rank Indicator, RI).
[00288] Optionally, assuming that a period of
TT>T>T>T> T Reverse ^IR report (in seconds), ⁴ 3 laughs 1 2. To be more specific, the terminal device determines R based on the code books W4 and W3 that are reported last time. Based on R, the terminal device determines the Wi and CQI codebooks. Here other possible
TT ⁴ ' ³ are not excluded.
[00289] The foregoing communication in accordance with the present invention. The following is a terminal device for
W2 and finally determines the
T value relationships between ^IR and describes the method of the embodiments of the describes a base station and according to the ways of
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112/138 embodiment of the present invention with reference to FIG. 6 through FIG. 13.
[00290] FIG. 6 is a schematic structural diagram of a base station 600 according to an embodiment of the present invention. As shown in FIG. 6, the base station 600 includes a transmission unit 610 and a receiving unit 620.
[00291] Transmission unit 610 is configured to transmit signals to a terminal device using n groups of ports, where each of the n groups of ports includes at least two ports, and n is a positive integer greater than or equal to 2.
[00292] The receiving unit 620 is configured to receive the first groups of linear combination coefficients transmitted by the terminal device, where each first group of linear combination coefficients includes at least first linear combination coefficients of one of the door groups. a first group of linear combination coefficients includes at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first pre-coding matrix, the door groups are included in the n door groups , s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
[00293] In this embodiment of the present invention, the first groups of linear combination coefficients are transmitted to the base station. This can improve the accuracy of the channel feedback of the terminal device, in addition to helping to improve the
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113/138 transmission performance between the base station and the terminal device.
[00294] Optionally, the first precoding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of base vectors includes base vectors from one of the door groups .
[00295] In some embodiments, the first groups of linear combination coefficients are used to perform the linear combination on the groups of base vectors to obtain the first precoding matrix.
[00296] Optionally, the receiving unit 620 is further configured to receive base vector information and the second linear combination coefficients transmitted by the terminal device, where the base vector information is used to indicate the groups of base vectors each group of base vectors includes base vectors from one of the door groups and at least one group of base vectors includes at least two base vectors; and the first precoding matrix is obtained by calculating based on the s groups of base vectors, the first groups of linear combination coefficients and the second linear combination coefficients.
[00297] In some embodiments, each first group of linear combination coefficients is used to perform linear combination on each group of base vectors to generate a second precoding matrix for each group of doors, and the second combination coefficients linear are used to
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114/138 perform linear combinations on the second pre-coding matrices of the door groups to obtain the first pre-coding matrix.
[00298] Optionally, the transmission unit 610 is further configured to transmit the first configuration information to the terminal device before the receiving unit 620 receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit 620 is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, the first configuration information transmitted by the terminal device; where the first configuration information is used to indicate at least a frequency domain granularity of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient and an amount of quantized bits of the phase and an amount of quantified bits of the amplitude of each second linear combination coefficient.
[00299] Optionally, the transmission unit 610 is further configured to transmit the second configuration information of each of the n groups of ports to the terminal device before the receiving unit 620 receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit 620 is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, the second configuration information for each of the n groups of
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115/138 ports, transmitted by the terminal device; where the second configuration information is used to indicate a group of base vectors from each group of ports, and the second configuration information of at least two of the n groups of ports is different.
Optionally, the transmission unit 610 is further configured to transmit third configuration information to the terminal device before the receiving unit 620 receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit 620 is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, third configuration information transmitted by the terminal device; where the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
[00301] Optionally, the transmission unit 610 is further configured to transmit fourth configuration information from each of the n groups of ports to the terminal device before the receiving unit 620 receives the first groups of linear combination coefficients transmitted by the device terminal; or the receiving unit 620 is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, fourth configuration information for each of the n groups of ports, transmitted by the terminal device; where the fourth configuration information is used to indicate at least
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116/138 minus a phase frequency domain granularity and a frequency domain granularity of first amplitudes of linear combination coefficients for each group of ports and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients for each door group, and fourth configuration information for at least two of the n door groups is different.
[00302] Optionally, the transmission unit 610 is further configured to transmit grouping information from the n groups of ports to the terminal device before the receiving unit 620 receives the first groups of linear combination coefficients transmitted by the terminal device.
[00303] It should be understood that, the base station 600 according to this embodiment of the present invention can correspond to the base station in communication method 100 according to the embodiment of the present invention, and the operations and / or functions preceding and others of each unit at base station 600 are intended to implement the corresponding procedure of method 100 in FIG. 1. For the sake of brevity, the details are not described again here.
[00304] It should be noted that, the transmission unit 610 can be implemented by a transmitter, and the receiving unit 620 can be implemented by a receiver.
[00305] FIG. 7 is a schematic structural diagram of a base station 700 according to another embodiment of the present invention. As shown in FIG. 7, the base station 700 includes a processor 710, a
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117/138 transmitter 720, receiver 730 and memory 740, where processor 710, transmitter 720, receiver 730 and memory 740 communicate with each other using an internal connection channel, and transfer a control signal and / or a data signal. Memory 740 is configured to store an instruction and processor 710 is configured to execute the instruction stored in memory 740.
[00306] 0 720 transmitter it's the receptor 730 are configured to transmit a signal and receive a signal under control of the 710 processor. [00307] Must be understood what, the station base 700
according to this embodiment of the present invention can correspond to the base station in the communication method 100 according to the embodiment of the present invention and the base station 600 according to the embodiment of the present invention, and the operations and / or previous and other functions of each unit at base station 700 are intended to implement the corresponding procedure of method 100 in FIG. 1. For the sake of brevity, the details are not described again here.
[00308] FIG. 8 is a schematic structural diagram of an end device 800 according to an embodiment of the present invention; As shown in FIG. 8, terminal device 800 includes a receiving unit 810 and a transmitting unit 820.
[00309] Receiving unit 810 is configured to receive signals transmitted by a base station using n groups of ports, where each of the n groups of ports includes at least two ports, and n is a positive integer greater than or equal to 2.
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118/138 [00310] The transmission unit 820 is configured to transmit the first groups of linear combination coefficients to the base station, where each first group of linear combination coefficients includes the first linear combination coefficients of one of the s groups of ports, at least a first group of linear combination coefficients includes at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first precoding matrix, the groups of ports are included in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
[00311] In this embodiment of the present invention, the first groups of linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, and it also helps to improve the transmission performance between the base station and the terminal device.
[00312] Optionally, the first precoding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of base vectors includes base vectors from one of the door groups .
[00313] In some embodiments, the first groups of linear combination coefficients are used to perform the linear combination on the groups of base vectors to obtain the first precoding matrix.
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119/138 [00314] Optionally, the transmission unit 820 is further configured to transmit base vector information and the second linear combination coefficients to the base station, where the base vector information is used to indicate the groups of base vectors, each group of base vectors includes base vectors from one of the door groups and at least one base vector group includes at least two base vectors; and the first pre-coding matrix is obtained by calculating based on the s groups of base vectors, the first groups of linear combination coefficients, and the second linear combination coefficients.
[00315] In some embodiments, each first group of linear combination coefficients is used to perform linear combination in each group of base vectors to generate a second precoding matrix for each group of doors, and the second combination coefficients linear are used to perform linear combination in the precoding matrices of the door groups to obtain the first precoding matrix.
[00316] Optionally, the receiving unit 810 is further configured to receive, before the transmission unit 820 transmits the first groups of linear combination coefficients to the base station, the first configuration information transmitted by the base station; or the transmission unit is further configured to transmit the first configuration information to the base station before transmitting the first groups of linear combination coefficients to
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120/138 the base station; where the first configuration information is used to indicate at least one frequency domain granularity of a phase and one frequency domain granularity of an amplitude of each second linear combination coefficient, and an amount of quantized bits of the phase and an amount quantified bits of the amplitude of each second linear combination coefficient.
[00317] Optionally, the receiving unit 810 is further configured to receive, before the transmission unit 820 transmits the first groups of linear combination coefficients to the base station, the second configuration information corresponding to each of the n groups of ports, transmitted by the base station; or the transmission unit is further configured to transmit the second configuration information corresponding to each of the n groups of ports to the base station before transmitting the first groups of linear combination coefficients to the base station; where the second configuration information is used to indicate a group of base vectors corresponding to each group of doors, and the second configuration information corresponding to at least two of the n groups of doors is different.
[00318] Optionally, the receiving unit 810 is further configured to receive, before the transmission unit 820 transmits the first groups of linear combination coefficients to the base station, third configuration information transmitted by the base station; or the 820 transmission unit is still
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121/138 configured to transmit third configuration information to the base station before transmitting the first groups of linear combination coefficients to the base station; where the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
[00319] Optionally, the receiving unit 810 is further configured to receive, before the transmission unit 820 transmits the first groups of linear combination coefficients to the base station, fourth configuration information for each of the n groups of ports, transmitted by the base station; or the transmission unit 820 is further configured to transmit fourth configuration information from each of the n groups of ports to the base station before transmitting the first groups of linear combination coefficients to the base station; where the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients for each group of ports, and a quantity of quantized bits of the phases and a number of quantized bits of the amplitudes of the first linear combination coefficients for each group of ports, and fourth configuration information for at least two of the n groups of ports is different.
[00320] Optionally, the receiving unit 810 is further configured to receive, before the transmission unit 820 transmits the first groups of
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122/138 linear combination coefficients for the base station, grouping information of the n groups of ports that are transmitted by the base station.
[00321] It should be understood that the terminal device 800 according to this embodiment of the present invention can correspond to the terminal device in the communication method 100 according to the embodiment of the present invention, and the operations and / or functions precedents and others of each unit in terminal device 800 is intended to implement the corresponding procedure of method 100 in FIG. 1. For the sake of brevity, the details are not described again here.
[00322] It should be noted that, the receiving unit 810 can be implemented by a receiver, and the transmission unit 820 can be implemented by a transmitter.
[00323] FIG. 9 is a schematic structural diagram of a terminal device 900 according to another embodiment of the present invention. As shown in FIG. 9, the terminal device 900 includes a processor 910, a receiver 920, a transmitter 930 and a memory 940, wherein processor 910, receiver 920, transmitter 930 and memory 940 communicate with each other using an internal connection channel and transfer a control signal and / or a data signal. Memory 940 is configured to store an instruction, and processor 910 is configured to execute the instruction stored in memory 940.
[00324] Receiver 920 and transmitter 930 are configured to receive a signal and transmit a signal under control of the 910 processor.
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123/138 [00325] It is to be understood that the terminal device 900 according to this embodiment of the present invention can correspond to the terminal device in the communication method 100 according to the embodiment of the present invention and the terminal device 800 according to the embodiment of the present invention, and the preceding and other operations and / or functions of each unit in the terminal device 900 are intended to implement the corresponding procedure of method 100 in FIG. 1. For the sake of brevity, the details are not described again here.
[00326] FIG. 10 is a schematic structural diagram of a terminal device 1000 according to an embodiment of the present invention; As shown in FIG. 10, terminal device 1000 includes a receiving unit 1010 and a transmitting unit 1020.
[00327] Receiving unit 1010 is configured to receive reference signals from n groups of doors, where each of the n groups of doors includes p doors, n is a positive integer greater than or equal to 2, and p is a positive integer greater than or equal to 1.
[00328] Transmission unit 1020 is configured to transmit the first groups of linear combination coefficients, base vector information, and second linear combination coefficients, where the first groups of linear combination coefficients, vector information and the second linear combination coefficients are determined based on the measurement results of the reference signals of the n door groups, where
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124/138 the first groups of linear combination coefficients are the first linear combination coefficients of selected door groups from n door groups, and are used to perform linear combinations in the door groups, where an x-th port in a first group of doors is linearly combined with an x2-th door in a second group of doors for an xs-th door in a seventh door group in the door groups, 1 <x _w <p, 1 <w <s , 2 <sún, ex _w , w, es are integers; and the base vector information and the second linear combination coefficients are determined based on the first groups of linear combination coefficients, the base vector information is used to indicate at least two base vectors, the second combination coefficients linear are used to perform the linear combination at least two base vectors, and the first groups of linear combination coefficients, the at least two base vectors and the second linear combination coefficients are used to determine a precoding matrix .
[00329] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are transmitted to a base station. This can improve the channel feedback accuracy of the terminal device, as well as helping to improve transmission performance between the base station and the terminal device.
[00330] The xl-th port in the first group of ports, and the x2-th port in the second group of ports for
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125/138 the x-th port in the s-th port group in the s port groups correspond to the same antenna.
[00331] Optionally, the transmission unit 1020 is further configured to transmit a CQI channel quality indicator, where the CQI is determined based on port identifiers in the groups and a matrix W, and the matrix W satisfies the following expression :
W = W3 * Wi * W2, where W3 is a matrix including the first linear combination coefficient groups, Wi is a matrix including the at least two base vectors, and W2 is a matrix including the second linear combination coefficients .
[00332] Optionally, the transmission unit 1020 is further configured to transmit a CQI, where the CQI is determined based on a W matrix, and the W matrix satisfies the following expression:
W = W ₄ * W3 * Wi * W2, where W ₄ is a matrix used to represent port identifiers in the s groups, W3 is a matrix including the first groups of linear combination coefficient, Wi is a matrix that includes the hairs minus two base vectors, and W2 is a matrix including the second coefficients of linear combinations.
[00333] Optionally, the transmission unit 1020 is further configured to transmit indication information, where the indication information includes the port identifiers in the groups.
[00334] Optionally, a feedback frequency domain granularity and / or a number of bits
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126/138 quantized of each of the first groups of linear combination coefficients are / is different from a feedback frequency domain granularity and / or an amount of quantized bits of each second linear combination coefficient, and the domain granularity Feedback frequency includes at least one of a broadband feedback, a subband feedback and a partial bandwidth feedback.
[00335] Optionally, the feedback frequency granularity of each of the first groups of linear combination coefficients is broadband feedback, and the feedback frequency granularity of each second linear combination coefficient is the subband feedback or partial bandwidth feedback.
[00336] Optionally, an amount of quantized bits of amplitude for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of an amplitude of each second linear combination coefficient; and / or an amount of quantized bits of phases for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of a phase of each second linear combination coefficient.
[00337] Optionally, the receiving unit 1010 is further configured to receive the first configuration information before the transmission unit 1020
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127/138 transmitting the first groups of linear combination coefficients; or the transmission unit 1020 is further configured to transmit the first configuration information before transmitting the first groups of linear combination coefficients; where the first configuration information is used to indicate a value of s or a maximum value of s.
[00338] Optionally, the receiving unit 1010 is further configured to receive second configuration information before the transmission unit 1020 transmits the first groups of linear combination coefficients; or the transmission unit 1020 is further configured to transmit the second configuration information before transmitting the first groups of linear combination coefficients; where the second configuration information is used to configure at least one phase feedback frequency domain granularity and one amplitude feedback frequency domain granularity of the first linear combination coefficients for each port group, and a number of bits quantified phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each group of gates.
[00339] Optionally, the receiving unit 1010 is further configured to receive third configuration information before the transmission unit 1020
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128/138 transmitting the second linear combination coefficients; or the transmission unit 1020 is further configured to transmit third configuration information before transmitting the second linear combination coefficients to the base station; where the third configuration information is used to configure at least one phase frequency domain granularity and one frequency domain granularity of the amplitude of each second linear combination coefficient, and the number of quantized bits of the phase and the number of bits quantified of the amplitude of each second linear combination coefficient.
[00340] Optionally, the receiving unit 1010 is further configured to receive, before the transmission unit 1020 transmits the first groups of linear combination coefficients, grouping information of the n groups of ports that are transmitted by the base station.
[00341] It is to be understood that the terminal device 1000 according to this embodiment of the present invention can correspond to the terminal device in the communication method 200 according to the embodiment of the present invention, and the operations and / or functions precedents and others of each unit in terminal device 1000 is intended to implement the corresponding procedure of method 200 in FIG. 2. For brevity, the details are not described again here.
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129/138 [00342] It should be noted that, the receiving unit 1010 can be implemented by a receiver, and the transmission unit 1020 can be implemented by a transmitter.
[00343] FIG. 11 is a schematic structural diagram of a terminal device 1100 according to another embodiment of the present invention. As shown in FIG. 11, terminal device 1100 includes a processor 1110, a transmitter 1120, a receiver 1130, and a memory 1140, where processor 1110, transmitter 1120, receiver 1130, and memory 1140 communicate with each other using a connection channel internal, and transfer a control signal and / or a data signal. Memory 1140 is configured to store an instruction, and processor 1110 is configured to execute the instruction stored in memory 1140.
[00344] Transmitter 1120 and receiver 1130 are configured to transmit a signal and receive a signal under the control of the 1110 processor.
[00345] It should be understood that the terminal device 1100 according to this embodiment of the present invention can correspond to the terminal device in the communication method 200 according to the embodiment of the present invention and the terminal device 1000 according to the embodiment of the present invention, and the previous and other operations and / or functions of each unit in the terminal device 1100 are intended to implement the corresponding procedure of method 200 in FIG. 2. For the sake of brevity, the details are not described again here.
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130/138 [00346] FIG. 12 is a schematic structural diagram of a base configuration 1200 according to an embodiment of the present invention. As shown in FIG. 12, the base station 1200 includes a transmitting unit 1210 and a receiving unit 1220.
[00347] Transmission unit 1210 is configured to transmit reference signals using n groups of ports, where each of the n groups of ports includes p ports, n is a positive integer greater than or equal to 2, and p is an integer positive greater than or equal to 1.
[00348] The receiving unit 1220 is configured to receive the first groups of linear combination coefficients, base vector information and second linear combination coefficients, where the first groups of linear combination coefficients are the first linear combination coefficients of s door groups selected by the terminal device from n door groups, and are used to perform linear combinations in the door groups, where an xth door in a first door group is linearly combined with an x2th door in a second group from doors to an xsth port in an sth port group in the s door groups, 1 <x _w <p, 1 <w <s, 2 <s ú n, ex _w , w, es are integers; and the base vector information and the second linear combination coefficients are determined based on the first groups of linear combination coefficients, the base vector information is used to indicate at least two base vectors, the second combination coefficients linear are used to perform the linear combination at least two vectors
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131/138 base, and the first groups of linear combination coefficients, the at least two base vectors and the second linear combination coefficients are used to determine a pre-coding matrix.
[00349] In this embodiment of the present invention, the first groups of linear combination coefficients, the base vector information and the second linear combination coefficients are transmitted to the base station. This can improve the channel feedback accuracy of the terminal device, and it also helps to improve the transmission performance between the base station and the terminal device.
[00350] Optionally, the xl-th port in the first port group, and the x2-port in the second port group for the xs-port in the s-port group in the port groups correspond to the same antenna .
[00351] Optionally, the receiving unit 1220 is further configured to receive a CQI channel quality indicator, where the CQI is determined based on port identifiers in the groups, in the first groups of linear combination coefficients, in the information base vector and the second linear combination coefficients.
[00352] Optionally, the receiving unit 1220 is further configured to receive indication information, where the indication information includes the port identifiers in the groups.
[00353] Optionally, a granularity of feedback frequency domain and / or a quantity of quantized bits from each of the first groups of
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132/138 linear combination coefficients are / is different from a feedback frequency domain granularity and / or a quantity of quantized bits of each second linear combination coefficient, and the feedback frequency domain granularity includes at least one of broadband feedback, sub-band feedback and partial bandwidth feedback.
[00354] Optionally, the feedback frequency domain granularity of each of the first groups of linear combination coefficients is broadband feedback, and the feedback frequency domain granularity of each second linear combination coefficient is the subband feedback or partial bandwidth feedback.
[00355] Optionally, an amount of quantized bits of amplitude for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of an amplitude of each second linear combination coefficient; and / or an amount of quantized bits of phases for each of the first groups of linear combination coefficients is greater than or equal to an amount of quantized bits of a phase of each second linear combination coefficient.
[00356] Optionally, the transmission unit 1210 is further configured to transmit the first configuration information before the receiving unit 1220 receives the first groups of linear combination coefficients; or
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133/138 the receiving unit 1220 is further configured to receive the first configuration information before receiving the first groups of linear combination coefficients; where the first configuration information is used to indicate a value of s or a maximum value of s.
[00357] Optionally, the transmission unit 1210 is further configured to transmit second configuration information before the receiving unit 1220 receives the first groups of linear combination coefficients; or the receiving unit 1220 is further configured to receive the second configuration information before receiving the first groups of linear combination coefficients; where the second configuration information is used to configure at least one phase feedback frequency domain granularity and one amplitude feedback frequency domain granularity of the first linear combination coefficients of each port group, and a number of bits quantified phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each group of gates.
[00358] Optionally, the transmission unit 1210 is further configured to transmit third configuration information before the receiving unit 1220 receives the second linear combination coefficients; or the receiving unit 1220 is further configured to receive third configuration information before receiving the second linear combination coefficients; Where
Petition 870190086433, of 9/3/2019, p. 139/150
134/138 the third configuration information is used to configure at least one frequency domain granularity of the phase and one frequency domain granularity of the amplitude of each second linear combination coefficient, and the quantity of quantized bits of the phase and the quantity quantified bits of the amplitude of each second linear combination coefficient.
[00359] Optionally, the transmission unit 1210 is further configured to transmit grouping information from the n groups of doors before the receiving unit 1220 receives the first groups of linear combination coefficients.
[00360] It should be understood that, the base station 1200 according to this embodiment of the present invention can correspond to the base station in communication method 200 according to the embodiment of the present invention, and the operations and / or functions preceding and others of each unit at base station 1200 are intended to implement the corresponding procedure of method 200 in FIG. 2. For the sake of brevity, the details are not described here.
[00361] It should be noted that, the transmitting unit 1210 can be implemented by a transmitter, and the receiving unit 1220 can be implemented by a receiver.
[00362] FIG. 13 is a schematic structural diagram of a base station 1300 according to another embodiment of the present invention. As shown in FIG. 13, the base station 1300 includes a processor 1310, a receiver 1320, a transmitter 1330 and a memory 1340, wherein processor 1310, receiver 1320, transmitter 1330
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135/138 and memory 1340 communicate with each other using an internal connection channel, and transfer a control signal and / or a data signal. The 1340 memory is configured to store an instruction, and the 1310 processor is configured to execute the instruction stored in 1340 memory.
[00363] Receiver 1320 and transmitter 1330 are configured to receive a signal and transmit a signal under the control of the 1310 processor.
[00364] It should be understood that, the base station 1300 according to this embodiment of the present invention can correspond to the base station in the communication method 200 according to the embodiment of the present invention and the base station 1200 according to the embodiment of the present invention, and the preceding and other operations and / or functions of each unit at the base station 1300 are intended to implement the corresponding procedure of method 200 in FIG. 2. For the sake of brevity, the details are not described again here.
[00365] The memory in the previous embodiments may include a volatile memory, for example, a random-access memory, RAM. The memory may also include a non-volatile memory, for example, a flash memory, a hard disk drive, HDD, or a solid-state drive drive, SDD). The memory can also include a combination of the previous memory types.
[00366] The processor in the previous embodiments can be a central processing unit (CPU), a network processor
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136/138 (network processor, NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD can be a complex programmable logic device (CPLD), an array of field programmable gates (field-programmable gate array, FPGA), a generic array logic (generic array logic, GAL), or any combination of these.
[00367] A person skilled in the art may be aware that, in combination with the examples described in the embodiments disclosed in this report, units and algorithm steps can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on certain applications and design restrictions of the technical solutions. A person skilled in the art can use different methods to implement the functions described for each particular application, but the implementation should not be considered to go beyond the scope of the embodiments of the present invention.
[00368] It can be clearly understood by a technician on the subject that, for the purpose of a convenient and brief description, for a detailed work process of the system, apparatus and previous unit, reference can be made to a corresponding process in the ways of carrying out previous methods, and details are not described here again.
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137/138 [00369] In the various embodiments provided in this application, it should be understood that the disclosed system, apparatus and method can be implemented in other ways. For example, the described embodiment of the apparatus is merely an example. For example, the division of the unit is merely a division of the logical function and can be another division in the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not implemented. In addition, the mutual couplings displayed or discussed or direct couplings or communication connections can be implemented using some interfaces. Indirect couplings or communication connections between devices or units can be implemented in electronic, mechanical or other forms.
[00370] The units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one position, or may be distributed in a plurality of network units. Some or all of the units can be selected according to the actual requirements to achieve the objectives of the solutions of the embodiments.
[00371] In addition, the functional units in the embodiments of the present invention can be integrated into a processing unit, or each of the units can exist physically alone, or two or more units are integrated into one unit.
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138/138 [00372] When functions are implemented in the form of a functional software unit and sold or used as a stand-alone product, the functions can be stored on a computer-readable storage medium. Based on this understanding, the technical solutions of the present invention, essentially, or the part that contributes to the state of the art, or some of the technical solutions, can be implemented in the form of a software product. The software product is stored on a storage medium and includes several instructions for instructing a computer device (which can be a personal computer, a server or a network device) to perform all or some of the steps in the methods described in the forms of realization of the present invention. The previous storage medium includes: any medium that stores program code, such as a USB drive, a removable hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM) , a magnetic disk, or an optical disk.
[00373] The foregoing descriptions are merely specific forms of implementation of the present invention, but are not intended to limit the scope of protection of the present invention. Any variation or substitution promptly determined by a person skilled in the art within the technical scope disclosed in the present invention will fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention will be subject to the scope of protection of the claims.

权利要求:
Claims (17)
[1]
1. Communication method, characterized by the fact that it comprises:
transmit (110), through a base station, signals to a terminal device using n groups of ports, where each of the n groups of ports comprises at least two ports, and n is a positive integer greater than or equal to 2; and receiving (120), by the base station, the first groups of linear combination coefficients transmitted by the terminal device, wherein each first group of linear combination coefficients comprises first linear combination coefficients of one of the groups of doors, at least one first group of linear combination coefficients comprises at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first pre-coding matrix, the door groups are comprised of the n door groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
[2]
2. Method, according to claim 1, characterized by the fact that the first pre-coding matrix is obtained based on the first groups of combination coefficients
linear and in the groups of vectors base, and each group in vectors base understands vectors in base of one of s groups of doors. 3 Method, in a deal with The claim 1,
characterized by the fact that it still comprises
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2/17 receive, from the base station, the base vector information and the second linear combination coefficients transmitted by the terminal device, where the base vector information is used to indicate the groups of base vectors, each group of vectors base comprises base vectors of one of the s door groups, and at least one base vector group comprises at least two base vectors; and the first pre-coding matrix is obtained through
based calculation we s groups base vectors, the s first groups of coefficients linear combination, and the s second coefficients combination linear.4. Method, in wake up with the claim3, characterized by fact that before receipt, through the base station first s group s of coefficients in
linear combination transmitted by the terminal device, the method further comprises:
transmit, through the base station, the first configuration information to the terminal device; or receive, by the base station, the first configuration information transmitted by the terminal device; wherein the first configuration information is used to indicate at least one frequency domain granularity of a phase and one frequency domain granularity of an amplitude of each second linear combination coefficient, and a quantity of quantized bits of the phase and a number of quantized bits of the amplitude of each second linear combination coefficient.
5. Method, according to claim 3 or 4, characterized by the fact that before receipt, by the
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[3]
3/17 base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method further comprises:
transmitting, through the base station, second configuration information for each of the n groups of ports to the terminal device; or receive, by the base station, second configuration information for each of the n groups of ports, transmitted by the terminal device; where the second configuration information is used to
indicate a group of vectors of base of each group of doors, and the second information configuration in fur minus two of the n door groups is different.6. Method, according with any an of
claims 1 to 5, characterized by the fact that before the reception, by the base station, of the first groups of linear combination coefficients transmitted by the terminal device, the method further comprises:
transmit, through the base station, third configuration information to the terminal device; or receive, by the base station, third configuration information transmitted by the terminal device; wherein the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
7. Method according to any one of claims 1 to 6, characterized by the fact that before receiving, by the base station, the first groups of linear combination coefficients transmitted by the terminal device, the method further comprises:
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[4]
4/17 transmit, by the base station, fourth configuration information of each of the n groups of ports to the terminal device; or receive, by the base station, fourth configuration information for each of the n groups of ports, transmitted by the terminal device; where the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and a number of quantized bits of the amplitudes of the first linear combination coefficients for each group of gates;
transmit, through the base station, fifth configuration information to the terminal device; or receive, by the base station, the fifth configuration information transmitted by the terminal device; where the fifth configuration information is used to indicate a number of ports selected by the terminal device for each group of ports.
8. Communication method, characterized by the fact that it comprises:
receiving (110), by a terminal device, signals transmitted by a base station using n groups of ports, where each of the n groups of ports comprises at least two ports, and n is a positive integer greater than or equal to 2; and transmit (120), through the terminal device, the first groups of coefficients of linear combinations
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[5]
5/17 for the base station, where each first group of linear combination coefficients comprises first linear combination coefficients of one of the door groups, at least one first group of linear combination coefficients comprises at least two non-zero coefficients , the first groups of linear combination coefficients are used to determine a first pre-coding matrix, the door groups are comprised of the n door groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
9. Method, according to claim 8, characterized by the fact that the first pre-coding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of vectors base comprises base vectors of one of the door groups.
10. Method, according to claim 8, characterized by the fact that it also comprises transmitting, by the terminal device, base vector information and second linear combination coefficients to the base station, in which the base vector information is used to indicate the groups of base vectors, each group of base vectors comprises base vectors of one of the s groups of doors, and at least one group of base vectors comprises at least two base vectors; and the first pre-coding matrix is obtained through calculation based on the groups of base vectors, the s
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[6]
6/17 first groups of linear combination coefficients, and the second groups of linear combination coefficients.
11. Method, according to claim 10, characterized by the fact that before the transmission, by the terminal device, of the first s groups of linear combination coefficients to the base station, the method further comprises:
receiving, by the terminal device, the first configuration information transmitted by the base station; or transmit, through the terminal device, the first configuration information to the base station; wherein the first configuration information is used to indicate at least one frequency domain granularity of a phase and one frequency domain granularity of an amplitude of each second linear combination coefficient, and a quantity of quantized bits of the phase and a number of quantized bits of the amplitude of each second linear combination coefficient.
12. Method according to claim 10 or 11, characterized by the fact that before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method further comprises:
receiving, by the terminal device, second configuration information corresponding to each of the n groups of ports, transmitted by the base station; or transmit, by the terminal device, second configuration information corresponding to each of the n groups of ports to the base station; on what
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[7]
7/17 the second configuration information is used to indicate a group of base vectors corresponding to each group of doors, and the second configuration information corresponding to at least two of the n groups of doors is different.
13. Method according to any one of claims 8 to 12, characterized in that before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method further comprises:
receiving, by the terminal device, third configuration information transmitted by the base station; or transmit, through the terminal device, third configuration information to the base station; wherein the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
Method according to any one of claims 8 to 13, characterized by the fact that before the transmission, by the terminal device, of the first groups of linear combination coefficients from the terminal device to the base station, the method further comprises:
receiving, by the terminal device, fourth configuration information for each of the n groups of ports, transmitted by the base station; or transmit, by the terminal device, fourth configuration information for each of the n groups of ports to the base station; on what
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[8]
8/17 the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and number of quantized bits of the amplitudes of the first linear combination coefficients for each group of gates;
receiving, by the terminal device, fifth configuration information transmitted by the base station; or transmit, through the terminal device, fifth
configuration information for the base station; on what the fifth information in configuration is used for indicate a quantity in selected ports fur
terminal device for each group of ports.
15. Base station, characterized by the fact that it comprises:
a transmission unit (610), configured to transmit signals to a terminal device using n groups of ports, where each of the n groups of ports comprises at least two ports, and n is a positive integer greater than or equal to 2; and a receiving unit (620), configured to receive the first groups of linear combination coefficients transmitted by the terminal device, wherein each first group of linear combination coefficients comprises first linear combination coefficients of one of the door groups, at least one first group of linear combination coefficients comprises at least two non-zero coefficients,
Petition 870190139426, of 12/26/2019, p. 12/25
[9]
9/17 the first groups of linear combination coefficients are used to determine a first pre-coding matrix, the door groups are comprised of the n door groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
16. Base station, according to claim 15, characterized by the fact that the first pre-coding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of base vectors comprise base vectors of one of the door groups.
17. Base station, according to claim 15, characterized by the fact that the receiving unit is additionally configured to receive base vector information and the second linear combination coefficients transmitted by the terminal device, in which the base vector information is used to indicate the groups of base vectors, each group of base vectors comprises base vectors from one of the door groups, and at least one group of base vectors includes at least two base vectors; and the first precoding matrix is obtained by calculating based on the s groups of base vectors, the first groups of linear combination coefficients, and the second linear combination coefficients.
18. Base station, according to claim 17, characterized by the fact that
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[10]
10/17 the transmission unit is further configured to transmit first configuration information to the terminal device before the receiving unit receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, the first configuration information transmitted by the terminal device; wherein the first configuration information is used to indicate at least a frequency domain granularity of a phase and a frequency domain granularity of an amplitude of each second linear combination coefficient, and a quantity of quantized bits of the phase and a number of quantized bits of the amplitude of each second linear combination coefficient.
19. Base station according to claim 17 or 18, characterized in that the transmission unit is further configured to transmit second configuration information from each of the n groups of ports to the terminal device before the receiving unit receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, second configuration information of
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[11]
11/17 each of the n groups of ports, transmitted by the terminal device; wherein the second configuration information is used to indicate a group of base vectors from each group of ports, and the second configuration information of at least two of the n groups of ports is different.
Base station according to any one of claims 15 to 19, characterized in that the transmitting unit is further configured to transmit third configuration information to the terminal device before the receiving unit receives the first groups of coefficients linear combinations transmitted by the terminal device; or the receiving unit is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, third configuration information transmitted by the terminal device; wherein the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
21. Base station according to any one of claims 15 to 20, characterized in that the transmission unit is further configured to transmit fourth configuration information from each of the n groups of ports to the terminal device before the transmission unit. receiving receiving the first groups of linear combination coefficients transmitted by the terminal device; or
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[12]
12/17 the receiving unit is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, fourth configuration information for each of the n groups of doors, transmitted by the terminal device; where the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and a number of quantized bits of the amplitudes of the first linear combination coefficients for each group of gates;
the transmission unit is further configured to transmit fifth configuration information to the terminal device before the receiving unit receives the first groups of linear combination coefficients transmitted by the terminal device; or the receiving unit is further configured to receive, before receiving the first groups of linear combination coefficients transmitted by the terminal device, fifth configuration information transmitted by the terminal device; where the fifth configuration information is used to indicate a number of ports selected by the terminal device for each group of ports.
22. Terminal device, characterized by the fact that it comprises:
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[13]
13/17 a receiving unit (810), configured to receive signals transmitted by a base station using n groups of ports, where each of the n groups of ports comprises at least two ports, and n is a positive integer greater than or equal to 2; and a transmission unit (820), configured to transmit the first groups of linear combination coefficients to the base station, wherein each first group of linear combination coefficients comprises first linear combination coefficients of one of the door groups, at least one first group of linear combination coefficients comprises at least two non-zero coefficients, the first groups of linear combination coefficients are used to determine a first pre-coding matrix, the door groups are comprised of the n groups of ports, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
23. Terminal device according to claim 22, characterized by the fact that the first pre-coding matrix is obtained based on the first groups of linear combination coefficients and the groups of base vectors, and each group of base vectors comprise base vectors of one of the door groups.
24. Terminal device according to claim 22, characterized by the fact that the transmission unit is further configured to transmit base vector information and the seconds
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[14]
14/17 linear combination coefficients for the base station, where the base vector information is used to indicate the groups of base vectors, each group of base vectors comprises base vectors of one of the groups of doors, and at least one group of base vectors comprises at least two base vectors; and the first precoding matrix is obtained through calculation based on the s groups of base vectors, the first groups of linear combination coefficients, and the second linear combination coefficients.
25. Terminal device according to claim 24, characterized in that the receiving unit is further configured to receive, before the transmission unit transmits the first groups of linear combination coefficients to the base station, first information of configuration transmitted by the base station; or the transmission unit is further configured to transmit first configuration information to the base station before transmitting the first groups of linear combination coefficients to the base station; wherein the first configuration information is used to indicate at least one frequency domain granularity of a phase and one frequency domain granularity of an amplitude of each second linear combination coefficient, and a quantity of quantized bits of the phase and a number of quantized bits of the amplitude of each second linear combination coefficient.
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[15]
15/17
26. Terminal device according to claim 24 or 25, characterized in that the receiving unit is further configured to receive, before the transmission unit transmits the first groups of linear combination coefficients to the base station, second configuration information corresponding to each of the n groups of ports, transmitted by the base station; or the transmission unit is further configured to transmit second configuration information corresponding to each of the n groups of ports to the base station before transmitting the first groups of linear combination coefficients to the base station; wherein the second configuration information is used to indicate a group of base vectors corresponding to each group of doors, and the second configuration information corresponding to at least two of the n groups of doors is different.
27. Terminal device according to any one of claims 22 to 26, characterized in that the receiving unit is further configured to receive, before the transmission unit transmits the first groups of linear combination coefficients to the base station , third configuration information transmitted by the base station; or the transmission unit is further configured to transmit third configuration information to the base station before transmitting the first groups of
Petition 870190139426, of 12/26/2019, p. 19/25
[16]
16/17 linear combination coefficients for the base station; wherein the third configuration information is used to indicate a number of port groups selected by the terminal device from the n port groups.
28. Terminal device according to any one of claims 22 to 26, characterized in that the receiving unit is further configured to receive, before the transmission unit transmits the first groups of linear combination coefficients to the base station , fourth configuration information for each of the n groups of ports, transmitted by the base station; or the transmission unit is further configured to transmit fourth configuration information from each of the n groups of ports to the base station before transmitting the first groups of linear combination coefficients to the base station; where the fourth configuration information is used to indicate at least a frequency domain granularity of the phases and a frequency domain granularity of the amplitudes of the first linear combination coefficients of each group of ports, and a quantity of quantized bits of the phases and a number of quantized bits of the amplitudes of the first linear combination coefficients for each group of gates;
the receiving unit is further configured to receive, before the transmitting unit transmits the first groups of linear combination coefficients to
Petition 870190139426, of 12/26/2019, p. 20/25
[17]
17/17 the base station, fifth configuration information transmitted by the base station; or the transmission unit is further configured to transmit fifth configuration information to the base station; where the fifth configuration information is used to indicate a number of ports selected by the terminal device for each group of ports.
29. Computer-readable storage medium, characterized by the fact that it comprises instructions, in which when the instructions are executed on a computer, the computer executes the method as defined in claim 1.
30. Communications device, characterized by the fact that it comprises:
a processor, configured to execute instructions stored in memory to cause the communications device to execute the method as defined in claim 1.
31. Computer-readable storage medium, characterized by the fact that it comprises instructions, in which when the instructions are executed on a computer, the computer executes the method as defined in claim 8.
32. Communications device, characterized by the fact that it comprises:
a processor, configured to execute instructions stored in memory to cause the communications device to execute the method as defined in claim 8.

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法律状态:
2021-10-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|

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CN201710002771|2017-01-03|

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CN201710079315.3A|CN108271265A|2017-01-03|2017-02-14|Communication means, base station and terminal device|

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PCT/CN2018/070080|WO2018127044A1|2017-01-03|2018-01-03|Communication method, base station and terminal device|

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