srs and terminal transmission method for this purpose

专利摘要:
The present invention relates to a method for transmitting an srs over a terminal which may comprise the steps of: receiving from a base station first information including information about at least one predetermined srs sequence parameter which is defined. in association with a frequency hopping pattern, between srs sequence parameters; generating an srs sequence for at least one predetermined srs sequence parameter using a value of a parameter corresponding to a frequency hopping pattern defined at the terminal; and transmitting, through a srs resource, the srs to which the generated srs sequence has been applied.
公开号:BR112019009928A2
申请号:R112019009928-0
申请日:2018-04-27
公开日:2019-11-05
发明作者:Kang Jiwon；Park Jonghyun；Lee Kilbom；Choi Kukheon；Kim Kyuseok；Ahn Minki
申请人:Lg Electronics Inc；
IPC主号:

专利说明:

"SRS TRANSMISSION METHOD AND TERMINAL FOR THIS PURPOSE"
TECHNICAL FIELD [001] The present invention relates to wireless communications and, more particularly, to a method of transmitting a probe reference symbol (SRS) and user equipment (UE) for this purpose.
PREVIOUS TECHNIQUE [002] When a new radio access technology (RAT) system is introduced, as more and more communication devices require greater communication capacity, the need arises for better mobile broadband communication compared to the existing RAT .
[003] In addition, massive machine-type communications (MTC) connected to a plurality of devices and things to provide various services at any time and anywhere are one of the main issues to be considered in next generation communication. In addition, the design of the communication system considering services / UEs sensitive to reliability and latency has been discussed. Thus, New RAT will provide services considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), URLLC (Ultra-Reliable Low Latency Communication) etc. In a next generation 5G system, scenarios can be divided into Enhanced Mobile Broadband (eMBB) / Ultra-Reliable Machine Type Communications (uMTC) / Massive Machine Type Communications (mMTC) etc. EMBB is a next generation mobile communication scenario with high spectrum efficiency, high data rate experienced by users etc., uMTC is a next generation mobile communication scenario with ultra-reliability, very low latency, very high availability etc. (for example, V2X, emergency service, remote control), and mMTC is a next generation mobile communication scenario with low cost, low energy, short package
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2/64 and massive connectivity (for example, ΙοΤ).
DESCRIPTION
TECHNICAL PROBLEM [004] An object of the present invention is to provide a method of transmitting an SRS.
[005] Another object of the present invention is to provide user equipment (UE) for transmitting an SRS.
[006] It will be appreciated by persons skilled in the art that objects that can be achieved with the present invention are not limited to what was particularly described above and the objects above and other objects that the present invention can achieve will be more clearly understood from the detailed description below.
TECHNICAL SOLUTION [007] The object of the present invention can be achieved by providing a method of transmitting a polling reference symbol (SRS) by a user equipment (UE) including receiving, from a base station, first information including information about at least one predetermined configured SRS sequence parameter interconnected with a frequency hop pattern between SRS sequence parameters, generate an SRS sequence using a parameter value corresponding to a frequency hop pattern configured in the UE with relation to at least one predetermined SRS sequence parameter, and transmit the SRS, to which the generated SRS sequence is applied, to the base station via SRS resources.
[008] The method may also include receiving second information including information indicating the value of the parameter corresponding to the frequency hopping pattern configured for the UE with respect to at least one predetermined SRS sequence parameter. The parameter value corresponding to the pattern
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3/64 frequency hopping configured in the UE can be set to a value that varies according to the frequency hopping pattern. Second information can be received in a downlink control information (DCI) format.
[009] Information about at least one predetermined SRS sequence parameter can include a value of at least one SRS sequence parameter. The frequency hop can be configured at an interval level with respect to the UE. The first information can be received through a radio resource control (RRC) signal. The SRS feature can include one or more symbols.
[010] In another aspect of the present invention, user equipment (UE) for transmitting a polling reference symbol (SRS) including a receiver configured to receive, from a base station, first information including information about at least one predetermined configured SRS sequence parameter interconnected with a frequency hop pattern between SRS sequence parameters, a processor configured to generate an SRS sequence using a parameter value corresponding to a frequency hop pattern configured in UE with respect to at least one predetermined SRS sequence parameter, and a transmitter configured to transmit the SRS, to which the generated SRS sequence is applied, via SRS resources.
[011] The receiver can be configured to still receive second information including information indicating the value of the parameter corresponding to the frequency hopping pattern configured in the UE with respect to at least one predetermined SRS sequence parameter. Information about the at least one predetermined SRS sequence parameter can include a value of at least one SRS sequence parameter. The value of the parameter corresponding to the frequency hopping pattern configured in the UE can be set to a value that varies according to the frequency hopping pattern. The frequency jump can be
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4/64 configured at an interval level with respect to the UE. The receiver can receive the first information through a radio resource control (RRC) signal. The receiver can receive the second information in a downlink control information (DCI) format.
ADVANTAGEOUS EFFECTS [012] According to the modality of the present invention, if UL full band polling is required at the time of transmission of SRS NR, UEs (for example, cell edge UEs), which may not perform band transmission total UL due to the UE link budget limitation, they can perform UL full band polling while subband polling jumps at multiple symbols or multiple intervals.
[013] The effects that can be achieved through the modalities of the present invention are not limited to what has been particularly described above, and other effects that are not described herein can be obtained by those skilled in the art from the detailed description below. That is, it should be noted that effects that are not intended by the present invention can be derived by those skilled in the art from the modalities of the present invention.
DESCRIPTION OF THE DRAWINGS [014] The accompanying drawings, which are included to provide a greater understanding of the invention, illustrate embodiments of the invention and, together with the description, serve to explain the principle of the invention. In the drawings:
[015] Figure 1 is a block diagram showing the configuration of a base station (BS) 105 and user equipment (UE) 110 in a wireless communication system 100;
[016] Figure 2a is a view showing an option 1 TXRU virtualization model (submatrix model) and Figure 2b is a view showing an option 2 TXRU virtualization model (full connection model);
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5/64 [017] Figure 3 is a block diagram for hybrid spatial filtering (beamforming);
[018] Figure 4 is a view showing an example of beams mapped to BRS symbols in hybrid spatial filtering;
[019] Figure 5 is a view showing symbol / subsymbol alignment between different numerologies;
[020] Figure 6 is a view showing the autocorrelation performance of length 52 using two pairs of Golay Complementary Sequences of length 26;
[021] Figure 7 is a view showing cross-correlation between sequences having different GSs in a Golay sequence of length 52;
[022] Figure 8 is a view showing cross-correlation and cubic metric evaluations of ZG, Golay and PN sequences.
[023] Figure 9 is a view showing an LTE jump pattern (n _s = 1 -> n _s = 4);
[024] Figure 10 illustrates triggering multiple symbol SRS for uplink beam management;
[025] Figure 11 illustrates an SRS sequence generation parameter combination {^ (^ (^^)), ^ (^ (^^)) 1 q _and according to a jump pattern (Γ, n _s ) . J [026] Figure 12 illustrates the collision between UEs at the time of the jump;
[027] Figure 13 illustrates an example of transmission of symbol level jump parameters via RRC signaling and interval level jump parameter transmission via DCI signaling;
[028] Figure 14 illustrates the case where a BS transmits symbol level jump parameters via DCI signaling and transmits jump parameters from
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6/64 interval level through RRC signaling;
[029] Figure 15 illustrates the case in which a BS transmits symbol level jump parameters through RRC signaling and transmits interval level jump parameters via DCI according to Proposal 2-1-2;
[030] Figure 16 illustrates an example of transmission of parameters for symbol level jump configuration and parameters for interval level jump configuration through RRC signaling according to Proposal 2-1-3;
[031] Figure 17 is a view showing an example of applying different symbol level jump patterns according to the jump cycle;
[032] Figure 18 is a view showing an example of application of the same symbol level jump pattern when transmitting aperiodic SRS;
[033] Figure 19 is a view showing an example of applying different symbol level jump patterns when transmitting aperiodic SRS;
[034] Figure 20 is a view showing an example of applying different symbol level jump patterns (jump over a partial band) at the time of aperiodic SRS transmission;
[035] Figure 21 is a view showing an example of applying different symbol-level jump patterns (jump over a specific sub-band) at the time of aperiodic SRS transmission;
[036] Figure 22 illustrates the SRS transmission according to the request field transmission using a set of hop parameters at the time of the aperiodic SRS transmission;
[037] Figure 23 illustrates the jump when activating counter N = 3;
[038] Figure 24 illustrates symbol level jump when r = 2 repetition;
[039] Figure 25 illustrates a jump pattern according to the number of symbols in an SRS;
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7/64 [040] Figure 26 illustrates a jump pattern according to the number of symbols in an SRS (when the number of SRS symbols in an SRS interval is less than a symbol jump cycle);
[041] Figure 27 is a view showing the description of Case 1-1;
[042] Figure 28 is a view showing the description of Case 1-2;
[043] Figure 29 is a view showing the description of Case 2;
[044] Figure 30 is a view showing the description of Case 3;
[045] Figure 31 is a view showing the configuration of a fixed SRS resource position at the time of periodic / aperiodic SRS transmission;
[046] Figure 32 is a view showing the jump configuration between partial bands at the time of periodic / aperiodic activation;
[047] Figure 33 is a view showing the jump configuration between partial bands at the time of periodic / aperiodic activation;
[048] Figure 34 is a view showing an example of changing an SRS resource position at the time of periodic / aperiodic triggering (a partial band is fixed);
[049] Figure 35 is a view showing an example of changing an SRS resource position at the time of periodic / aperiodic triggering (a partial band is variable); and [050] Figure 36 is a view showing a symbol level jump pattern considering RF tuning of a UE having narrowband RF capability.
BEST MODE [051] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The detailed description of the invention includes details to assist in the full understanding of the present invention. However, it is evident to those skilled in the art that this
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8/64 invention can be implemented without these details. For example, although the following descriptions are made in detail based on the assumption that a mobile communication system includes the LTE 3GPP system, the following descriptions are applicable to other random mobile communication systems in a way that excludes exclusive LTE features. 3GPP.
[052] Occasionally, to prevent the present invention from being unclear, structures and / or devices known to the public are omitted or can be represented as block diagrams centered on the main functions of the structures and / or devices. Whenever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts.
[053] In addition, in the following description, it is assumed that a terminal is a common name for a mobile or fixed user stage device such as user equipment (UE), mobile station (MS), mobile station advanced (AMS) and the like. And it is assumed that a base station (BS) is a common name for a random node of a network stage communicating with a terminal such as a Node B (NB), an eNode B (eNB), an access point (AP), gNode B and the like. Although the present invention is described based on the IEEE 802.16m system, the content of the present invention can be applicable to several types of other communication systems.
[054] In a mobile communication system, user equipment can also be used to receive information in downlink and is also capable of transmitting information in uplink. The information transmitted or received by the user equipment node can include various types of data and control information. Depending on the types and uses of the information transmitted or received by the user equipment, there may be several physical channels.
[055] The following descriptions are usable for various access systems
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Wireless 9/64 including CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (multiple access by single carrier frequency division) and the like. CDMA can be implemented by radio technology such as UTRA (universal terrestrial radio access), CDMA 2000 and the like. TDMA can be implemented with radio technology such as GSM / GPRS / EDGE (Global System for Mobile Communications) / General Radio Package Service / Enhanced Data Rates for GSM Evolution). OFDMA can be implemented with radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UTRA (UTRA Evolved) etc. UTRA is part of UMTS (Universal Mobile Telecommunication System). LTE (long term evolution) 3GPP (Partnership Project 3rd generation) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA. LTE 3GPP employs OFDMA in DL and SC-FDMA in UL. And LTE-A (LTE-Advanced) is an evolved version of LTE 3GPP.
[056] In addition, in the description below, specific terminologies are provided to assist in understanding the present invention. And the use of specific terminology can be modified in another way within the scope of the technical idea of the present invention.
[057] Figure 2 is a block diagram for configurations of a base station 105 and user equipment 110 in a wireless communication system 100.
[058] Although a base station 105 and user equipment 110 (D2D user equipment included) are shown in the drawing to schematically represent a wireless communication system 100, wireless communication system 100 can include at least one station base and / or at least one user equipment.
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10/64 [059] Referring to Figure 2, a base station 105 may include a transmitted data processor (Tx) 115, a symbol modulator 120, a transmitter 125, a transceiver antenna 130, a processor 180, a memory 185, a receiver 190, a symbol demodulator 195 and a received data processor 197. And user equipment 110 may include a transmitted data processor (Tx) 165, a symbol modulator 170, a transmitter 175, an antenna transceiver 135, processor 155, memory 160, receiver 140, symbol demodulator 155 and received data processor 150. Although the base station / user equipment 105/110 includes an antenna 130/135 in the drawing, each one of the base station 105 and user equipment 110 includes a plurality of antennas. Therefore, each of the base station 105 and user equipment 110 of the present invention supports a MIMO (multiple input multiple output) system. And the base station 105 according to the present invention can support both SU-MIMO (single user MIMO) and MU-MIMO (multiple user MIMO) systems.
[060] In downlink, the transmission data processor 115 receives traffic data, encodes the received traffic data by formatting the received traffic data, merges the encoded traffic data, modulates the merged data (or symbol maps) and then provides modulated symbols (data symbols). The symbol modulator 120 provides a flow of symbols receiving and processing data symbols and pilot symbols.
[061] The symbol modulator 120 multiplexes the data and the pilot symbols together and then transmits the multiplexed symbols to transmitter 125. In doing so, each of the transmitted symbols can include the data symbol, the pilot symbol or a sign value of zero. At each symbol duration, pilot symbols can be transmitted contiguously. In doing so, pilot symbols can include frequency division multiplexing (FDM), division multiplexing symbols
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11/64 orthogonal frequency (OFDM) or code division multiplexing (CDM).
[062] Transmitter 125 receives the flow of the symbols, converts the received flow into at least one or more analog signals, additionally adjusts the analog signals (for example, amplification, filtering, frequency upward conversion) and generates a suitable downlink signal for a broadcast on a radio channel. Subsequently, the downlink signal is transmitted to the user equipment via antenna 130.
[063] In the configuration of user equipment 110, the receiving antenna 135 receives the downlink signal from the base station and then supplies the received signal to the receiver 140. The receiver 140 adjusts the received signal (for example, filtering, amplification and downward frequency conversion), digitize the adjusted signal and take samples. Symbol demodulator 145 demodulates received pilot symbols and then supplies them to processor 155 for channel estimation.
[064] The symbol demodulator 145 receives an estimated frequency response value for processor downlink 155, performs demodulation of data on received data symbols, obtains estimated values of data symbols (ie estimated values of transmitted data symbols ) and then provides the estimated values of data symbols to the received data processor (Rx) 150. The received data processor 150 reconstructs the transmitted traffic data by performing demodulation (ie demapping, deinterleaving and symbol decoding) in the estimated data symbol values.
[065] Processing by the symbol demodulator 145 and processing by the received data processor 150 are complementary to processing by the symbol modulator 120 and processing by the transmitting data processor 115 at the base station 105, respectively.
[066] On user equipment 110 on uplink, the transmission data processor 165 processes traffic data and then provides traffic symbols
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12/64 data. The symbol modulator 170 receives the data symbols, multiplexes the received data symbols, modulates the multiplexed symbols, and then provides a flow of symbols to transmitter 175. Transmitter 175 receives the flow of symbols, processes the flow received and generates an uplink signal. This uplink signal is then transmitted to base station 105 via antenna 135.
[067] At base station 105, the uplink signal is received from user equipment 110 via antenna 130. Receiver 190 processes the received uplink signal and then takes samples. Subsequently, the symbol demodulator 195 processes the samples and then provides the pilot symbols received in uplink and an estimated data symbol value. The received data processor 197 processes the estimated data symbol value and then reconstructs the traffic data transmitted from user equipment 110.
[068] The 155/180 processor of the 110/105 user / base station equipment conducts the operations (eg control, tuning, management etc.) of the 110/105 user / base station equipment. The 155/180 processor can be connected to the 160/185 memory unit configured to store program codes and data. 160/185 memory is connected to the 155/180 processor to store operating systems, applications and general files.
[069] The 155/180 processor can be called a controller, microcontroller, microprocessor, microcomputer and the like. And the 155/180 processor can be implemented using hardware, firmware, software and / or any combination thereof. In hardware implementation, the 155/180 processor can be provided with a device configured to implement the present invention such as ASICs (application specific integrated circuits), DSPs (digital signal processors), DSPDs (digital signal processing devices), PLDs (programmable logic devices), FPGAs (field programmable port arrays) and the like.
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13/64 [070] However, in the case of implementing the modalities of the present invention using firmware or software, the firmware or software can be configured to include modules, procedures and / or functions to perform the functions or operations explained above of the present invention. And the firmware or software configured to implement the present invention is loaded into the 155/180 processor or saved in memory 160/185 to be triggered by the 155/180 processor.
[071] Layers of a radio protocol between a user equipment / base station and a wireless communication system (network) can be classified into L1 layer 1, layer 2 L2 and L3 layer 3 based on 3 lower layers of OSI model (open system interconnection) well known by communication systems. A physical layer belongs to the first layer and provides an information transfer service through a physical channel. The RRC layer (radio resource control) belongs to the third layer and provides control of radio resources between the UE and the network. A user device and a base station can exchange RRC messages with each other over a wireless communication network and RRC layers.
[072] In the present specification, although the 155/180 processor of the user / base station equipment performs a signal and data processing operation, except for a function for the 110/105 user / base station equipment to receive or transmit a signal, for the sake of clarity, processors 155 and 180 will not be specifically mentioned in the following description. In the following description, the 155/180 processor can be considered as performing a series of operations, such as data processing and the like, except for a function of receiving or transmitting a signal without being specifically mentioned.
[073] First, the transmission of SRS in an LTE / LTE-A 3GPP system will be described in Table 1 below.
Table 1
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14/64
A UE must transmit a Polling Reference Symbol (SRS) for service cell SRS resources based on two types of triggers:
- type 0 trigger: upper layer signaling
- type 1 actuator: DCI formats 0/4 / 1A for FDD and TDD and DCI formats 2B / 2C / 2D for TDD.
In case both SRS transmissions from the type 0 actuator and type 1 actuator occur in the same subframe in the same service cell, the UE should only transmit the SRS transmission from the type 1 actuator.
A UE can be configured with SRS parameters for the type 0 actuator and type 1 actuator in each service cell. The following SRS parameters are service cell specific and semi-statically configurable by upper layers for type 0 actuator and type 1 actuator.
Γ
- Combination of rc transmission, as defined in subclause 5.5.3.2 of [3] for type 0 actuator and each type 1 actuator configuration
- Assignment of the initial physical resource block arrc, as defined in subclause 5.5.3.2 of [3] for the type 0 trigger and each type 1 trigger configuration
- duration: single or indefinite (until deactivation), as defined in [11] for the type 0 trigger
- srs-Configlndex Isrs for SRS Tsrs periodicity and SRS Toffset frame deviation, as defined in Table 8.2-1 and Table 8.2-2 for type 0 trigger and SRS Tsrsj periodicity, and SRS Tsrs.i frame deviation , as defined in Table 8.2-4 and Table 8.2-5 for the type 1 driver
- SRS Bsrs bandwidth, as defined in subclause 5.5.3.2 of [3] for type 0 trigger and each type 1 trigger configuration
- Frequency hopping bandwidth, bho _P , as defined in subclause 5.5.3.2 of [3] for type 0 actuator
K ^õ ·
- ^SRS cyclic displacement, as defined in subclause 5.5.3.1 of [3] for the type 0 trigger and each type 1 trigger configuration
- Number of antenna ports N _P for the type 0 trigger and each type 1 trigger configuration
For the type 1 trigger and DCI format 4, three sets of SRS parameters, srs-ConfigApDCI-Format4, are configured by upper layer signaling. The 2-bit SRS request field [4] in DCI 4 format indicates the set of SRS parameters provided in Table 8.1 -1. For the type 1 trigger and DCI 0 format, a single set of SRS parameters, srs-ConfigApDCIFormatO, is configured by upper layer signaling. For type 1 trigger and DCI 1A / 2B / 2C / 2D formats, a single common set of SRS parameters, srs-ConfigApDCI-Format1a2b2c, is configured by layer signaling
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Higher 15/64. The SRS request field has 1 bit [4] for DCI formats 0 / 1A / 2B / 2C / 2D, with a type 1 SRS triggered if the SRS request field value is set to '1'.
A 1-bit SRS request field must be included in DCI formats 0 / 1A for type 1 frame structure and 0 / 1A / 2B / 2C / 2D for type 2 frame structure if the UE is configured with SRS for DCI formats 0 / 1A / 2B / 2C / 2D by upper layer signaling.
[074] Table 2 below shows an SRS request value for the type 1 trigger in DCI 4 format on an LTE / LTE-A 3GPP system.
Table 2
SRS Request Field Value description '00' No type 1 SRS trigger '01' The 1 ^Q set of SRS parameters configured by upper layers '10' The 2- set of SRS parameters configured by upper layers '11' The 3 ^Q set of SRS parameters configured by upper layers
[075] Table 3 below also describes additions related to the transmission of SRS in an LTE / LTE-A 3GPP system.
Table 3
Service cell-specific SRS transmission bandwidths are configured by upper layers. The allowable values are given in subclause 5.5.3.2 of [3].
Service cell-specific SRS transmission subframes are configured by upper layers. The admissible values are given in subclause 5.5.3.3 of [3].
For a TDD service cell, SRS transmissions can occur in UpPTS and uplink subframes of the UL / DL configuration indicated by assigning the upper layer parameter subframe to the service cell.
When selecting a closed loop EU transmission antenna is
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16/64 activated for a given service cell for a UE that supports transmission antenna selection, the index a (nsRs), of the EU antenna that transmits the SRS in osrs time is provided by a (nsRs) = nsRs mod 2 , for both polling bandwidths b _h S ·· B partial and total, and when frequency hopping is disabled (ie, ^{k (, p SRS} ), ^ srs) ~ l ⁿ SRS + [Psrs / 2_ | + β '. ⁿ SRS / j) ^m ° 42 when K is even
H ^ _s nj0d2 when / f is odd where <mo <
otherwise b <B when frequency hopping is enabled (ie, ^w ), where Bsrs, bhop, Nt>, and osrs are provided in the subclause
5.5.3.2 of [3], and (where regardless of the value of
Nb), except when a single SRS transmission is configured for the UE. If a UE is configured with more than one service cell, the UE is not expected to transmit SRS on different antenna ports simultaneously.
A UE can be configured to transmit SRS on Np antenna ports of a service cell, where Np can be configured by N signaling and 1012 41 upper layer. For PUSCH mode 1 P ¹ '' transmission and for N „e {0,1,2} PUSCH mode 2 ¹ transmission with two antenna ports configured for PUSCH and ^{Np ç} with 4 antenna ports configured for PUSCH. A UE configured to transmit SRS on multiple antenna ports in a service cell must transmit SRS to all transmit antenna ports configured within an SC-FDMA symbol in the same subframe of the service cell.
The SRS transmission bandwidth and initial physical resource block assignment are the same for all configured antenna ports in a given service cell.
An UE not configured with multiple TAGs must not transmit SRS on
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17/64 a symbol whenever SRS and PUSCH transmissions overlap on the same symbol.
For TDD service cell, when an SC-FDMA symbol exists in UpPTS of the given service cell, it can be used for the transmission of SRS. When two SC-FDMA symbols exist in UpPTS of the given service cell, both can be used for SRS transmission and, for the type 0 trigger SRS, both can be assigned to the same UE.
If a UE is not configured with multiple TAGs, or if a UE is configured with multiple TAGs and the SRS and PUGGH 2 / 2a / 2b format coincides in the same subframe in the same service cell,
-EU must not transmit type 0 triggered SRS whenever the type 0 triggered SRS transmissions and PUGGH 2 / 2a / 2b format coincide in the same subframe;
-EU must not transmit type 1 triggered SRS whenever transmissions of type 1 triggered SRS and PUGGH format 2a / 2b or format 2 with HARQ-AGK coincide in the same subframe;
-EU must not transmit PUGGH 2 format without HARQ-AGK whenever the transmissions of type 1 activated SRS and PUGGH 2 format without HARQ-AGK coincide in the same subframe.
If a UE is not configured with multiple TAGs, or if a UE is configured with multiple TAGs and SRS and PUGGH coincide in the same subframe in the same service cell,
-EU should not transmit SRS whenever the SRS transmission and PUCCH transmission carrying HARQ-ACK and / or positive SR coincide in the same subframe if the parameter ackNackSRS-SimultaneousTransmission is FALSE;
-For FDD-TDD and primary cell frame structure 1, the UE does not
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18/64 shall transmit SRS in a symbol whenever the transmission of SRS and transmission of PUCCH carrying HARQ-ACK and / or positive SR using short form as defined in sub-clauses 5.4.1 and 5.4.2A of [3] overlap in the same symbol if the ackNackSRS-SimultaneousTransmission parameter is TRUE.
- Except where prohibited, the UE must transmit SRS whenever the transmission of SRS and transmission of PUCCH carrying HARQ-ACK and / or positive SR using short form as defined in sub-clauses 5.4.1 and 5.4.2A of [3] coincide subframe if the ackNackSRSSimultaneousTransmission parameter is TRUE.
An UE not configured with multiple TAGs shall not transmit SRS whenever the transmission of SRS in any service cell and PUCCH transmission carrying HARQ-ACK and / or positive SR using normal PUCCH format as defined in sub-clauses 5.4.1 and 5.4. 2A of [3] coincide in the same subframe.
In UpPTS, whenever the SRS transmission instance overlaps the PRACH region for preamble format 4 or exceeds the bandwidth range of the uplink system configured in the service cell, the UE must not transmit SRS.
The ackNackSRS-SimultaneousTransmission parameter provided by upper layers determines whether a UE is configured to support the transmission of HARQ-ACK in PUCCH and SRS in a subframe. If it is configured to support HARQ-ACK transmission in PUCCH and SRS in a subframe, then, in the primary cell-specific SRS subframes, the UE must transmit HARQ-ACK and SR using the short PUCCH format as defined in sub-clauses 5.4.1 and 5.4.2A of [3], in which the HARQACK or the SR symbol corresponding to the SRS location is perforated.
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19/64
This short PUCCH format should be used in a cell-specific SRS subframe of the primary cell even if the UE does not transmit SRS in that subframe. The cell-specific SRS subframes are defined in subclause 5.5.3.3 of [3]. In contrast, the UE must use the normal PUCCH format 1 / 1a / 1b as defined in subclause 5.4.1 of [3] or normal PUCCH format 3 as defined in subclause 5.4.2A of [3] for the transmission of HARQ -ACK and SR.
The SRS configuration of the UE type 0 trigger in a service cell for SRS, Tsrs, and SRS frame offset, Toffset, is defined in Table 8.2-1 and Table 8.2-2, for service cell FDD and TDD, respectively. The Tsrs periodicity of the SRS transmission is specific to the service cell and is selected from the set {2, 5, 10, 20, 40, 80, 160, 320} ms or subframes.
For the periodicity of 2 ms SRS Tsrs in the TDD service cell, two SRS features are configured in a half frame containing the UL subframe (s) of the supplied service cell.
Transmission instances of SRS triggered type 0 in a given service cell for TDD service cell with Tsrs> 2 and for service cell (10 π f + - T _t ) mod Της. - 0 '
FDD are the subframes satisfying ____-___ — ___ — ______-___, where for
FDD, ksRs = {0, 1 ,,,, 0} is the subframe index within the frame, for TDD service cell, ksRs is defined in Table 8.2-3. The instances of transmission from SRS to TDD service cell with Tsrs = 2 are the subframes satisfying ksRS - Toffset.
For the TDD service cell, and a UE configured for transmission of SRS triggered type 0 in the service cell c, and the UE configured with the parameter EIMTA-MainConfigServCell-r12 for the service cell c, if the UE does not detect an indication configuration of UL / DL for m radio frame (as described
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20/64 in section 13.1), the UE must not transmit the type 0 trigger SRS in a subframe of the radio frame m which is indicated by the parameter eimtaHarqReferenceConfig-r12 as a downlink subframe, unless the UE transmits PUSCH in the same subframe.
The configuration of SRS of type 1 trigger of a UE in a service cell for periodicity of SRS, Tsrsj, and frame deviation of SRS, Toffsetj, is defined in Table 8.2-4 and Table 8.2-5, for service cell FDD and TDD, respectively. The Tsrsj periodicity of the SRS transmission is specific to the service cell and is selected from the set {2, 5, 10} ms or subframes.
For the periodicity of SRS Tsrsj of 2 ms in TDD service cell, two SRS resources are configured in a half frame containing UL subframe (s) of the determined service cell.
A UE configured to transmit type 1 driven SRS in the service cell c and not configured with a carrier indicator field must transmit SRS in the service cell c when a positive SRS request is detected in PDCCH / EPDCCH by programming PUSCH / PDSCH in the cell service c.
A UE configured for SRS transmission type 1 in the service cell c configured with a carrier indicator field must transmit SRS in the service cell c when a positive SRS request is detected in PDCCH / EPDCCH by programming PUSCH / PDSCH with the value carrier indicator field corresponding to the service cell c.
A UE configured to transmit type 1 driven SRS in service cell c upon detection of a positive SRS request in subframe n of the service cell must initiate SRS transmission in the first subframe satisfying n + k, k> 4 and ^{<lc 1 á} srs) m <* · / _sr <s, i - 0 for service cell cTDD with
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Tsrs, i> 2 and for service cell c FDD, (fe & c - |) mod 5 - 0 for service cell c TDD with Tsrs, i = 2 k = | 01 9} where, for service cell c FDD, ¹ ' ¹ is the subframe index within the nt frame, for service cell c TDD, ksRs is defined in Table 8.2-3.
A UE configured for type 1 driven SRS transmission is not expected to receive type 1 SRS trigger events associated with different type 1 trigger SRS transmission parameter values, as configured by upper layer signaling, for the same subframe and the same service cell.
For TDD service cell, and a UE configured with EIMTAMainConfigServCell-r12 for a c service cell, the UE must not transmit SRS in a subframe of a radio frame that is indicated by the corresponding elMTA-UL / DL configuration as a downlink subframe.
A UE must not transmit SRS whenever the SRS and PUSCH transmission corresponding to a Random Access Response Grant or a retransmission of the same transport block as part of the contention-based random access procedure coincide in the same subframe.
[076] Table 4 below shows a deviation of the Totfset subframe and EU Tsrs specific SRS periodicity for the type 0 trigger in FDD.
Table 4
SRS Isrs Configuration index SRS frequency (ms) SRS Subframe Deviation 0 - 1 2 Isrs 2 - 6 5 Isrs - 2 7- 16 10 Isrs - 7 17-36 20 Isrs - 17 37-76 40 Isrs - 37 77 - 156 80 Isrs - 77 157-316 160 Isrs - 157 317 - 636 320 Isrs - 317 637 - 1023 reserved reserved
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22/64 [077] Table 5 below shows a deviation of the Totfset subframe and UE Tsrs specific SRS frequency for the type 0 trigger in TDD.
Table 5
SRS Isrs Configuration index SRS frequency (ms) SRS Subframe Deviation 0 - 1 2 Isrs 2 - 6 5 Isrs - 2 7- 16 10 Isrs - 7 17-36 20 Isrs -17 37-76 40 Isrs - 37 77 - 156 80 Isrs -77 157-316 160 Isrs - 157 317 - 636 320 Isrs -317 637 - 1023 reserved reserved
Table 6
SRS Isrs configuration index SRS frequency (ms) SRS subframe deviation 0 2 0, 1 1 2 0, 2 2 2 1.2 3 2 0, 3 4 2 1.3 5 2 0, 4 6 2 1.4 7 2 2, 3 8 2 2, 4 9 2 3, 4 10 - 14 5 Isrs - 10 15-24 10 Isrs - 15 25 - 44 20 Isrs - 25 45 - 84 40 Isrs - 45 85-164 80 Isrs - 85 165 - 324 160 Isrs - 165 325 - 644 320 Isrs - 325 645-1023 reserved reserved
[078] Table 7 shows ksRs for TDD.
Table 7
su index frame n0 1 2 3 4 56 7 8 91 ^Q symbol ₂ q symbol 1 ^Q symbol ₂ q symbol
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UpPTS UpPTS UpPTS UpPTS ksRs in case of UpPTS length of 2 symbols0 1 2 3 45 6 7 8 9 ksRs in case of UpPTS length of 1 symbol12 3 467 8 9
[079] Table 8 below shows a deviation of the Toffsetj subframe and UE Tsrsi specific SRS frequency for the type 1 trigger in FDD.
Table 8
SRS Isrs Configuration index SRS frequency (ms) SRS Subframe Deviation 0 - 1 2 Isrs 2 - 6 5 Isrs - 2 7- 16 10 Isrs - 7 17 - 31 reserved reserved
[080] Table 9 below shows a deviation of the Toffsetj subframe and EU Tsrsj specific SRS Periodicity for the TDD type 1 trigger.
Table 9
SRS Isrs configuration index SRS frequency (ms) SRS Subframe Deviation 0 reserved reserved 1 2 0, 2 2 2 1.2 3 2 0, 3 4 2 1.3 5 2 0, 4 6 2 1.4 7 2 2, 3 8 2 2, 4 9 2 3, 4 10 - 14 5 Isrs - 10 15 - 24 10 Isrs - 15 25-31 reserved reserved
Analog beamforming [081] In an mmW system, as a wavelength is short, an
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24/64 plurality of antennas can be installed in the same area. That is, considering that the wavelength in the 30 GHz band is 1 cm, a total of 64 (8x8) antenna elements can be installed on a 4 cm by 4 cm panel in 0.5 lambda intervals (length waveform) in the case of a two-dimensional matrix. Therefore, in the mmW system, an attempt is made to improve coverage or throughput by increasing the gain of spatial filtering (BF) using multiple antenna elements. In this case, if each antenna element includes a transceiver unit (TXRU) to allow the adjustment of transmission power and phase per antenna element, each antenna element can perform independent spatial filtering by frequency feature. However, installing TXRUs on all about 100 antenna elements is less cost-effective. Therefore, a method of mapping a plurality of antenna elements to a TXRU and adjusting the direction of a beam using an analog phase switch was considered. However, such an analogue spatial filtering method is disadvantageous, since frequency selective spatial filtering is impossible, because only one beam direction is generated over the entire band. As an intermediate form of digital BF and analog BF, hybrid BF with TXRUs B that are less than Q antenna elements can be considered. In the case of hybrid BF, the number of beam directions that can be transmitted at the same time is limited to B or less, which depends on how TXRUs B and Q antenna elements are connected.
[082] Figure 2a is a view showing the TXRU virtualization model option 1 (submatrix model) and Figure 2b is a view showing the TXRU virtualization model option 2 (full connection model).
[083] Figures 2a and 2b show representative examples of a method of connecting TXRUs and antenna elements. Here, the TXRU virtualization model shows a relationship between the TXRU output signals and the antenna element output signals. Figure 2a shows a method of connecting TXRUs to
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25/64 submatrices. In this case, an antenna element is connected to a TXRU. In contrast, Figure 2b shows a method of connecting all TXRUs to all antenna elements. In this case, all elements of the antenna are connected to all TXRUs. In Figures 2a and 2b, W indicates a phase vector weighted by an analog phase switch. That is, W is one of the main parameters that determine the direction of the analogue spatial filtering. In this case, the mapping relationship between the CSI-RS antenna ports and the TXRUs can be 1 to 1 or 1 to many.
Hybrid spatial filtering [084] Figure 3 is a block diagram for hybrid spatial filtering.
[085] If a plurality of antennas are used in a New RAT system, a hybrid spatial filtering scheme, which is a combination of digital spatial filtering and analog spatial filtering, can be used. At this time, analog spatial filtering (or RF spatial filtering) means the operation of performing pre-coding (or combining) in an RF stage. In the hybrid spatial filtering scheme, each of a baseband stage and an RF stage uses a pre-coding (or combination) method, thereby reducing the number of RF chains and the number of D / A converters (or A / D) and achieving performance similar to the performance of digital spatial filtering. For convenience of description, as shown in Figure 4, the hybrid spatial filtering structure can be expressed by N transceivers (TXRUs) and physical antennas Μ. The digital spatial filtering for L data layers to be transmitted by a transmission side can be expressed by an NxL matrix, N digital signals are converted into analog signals via TXRUs and then an analogue spatial filtering expressed by an MxN matrix is applied.
[086] Figure 3 shows a hybrid spatial filtering structure in terms of TXRUs and physical antennas. At this moment, in Figure 3, the number of digital beams
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26/64 is L and the number of analog beams is N. Furthermore, in the New RAT system, a BS is designed to alter the analog spatial filtering in symbol units, thus supporting more efficient spatial filtering for a UE located in a region specific. In addition, in Figure 3, when N TXRUs and M RF antennas are defined as an antenna panel, even a method of introducing a plurality of antenna panels, to which independent hybrid spatial filtering is applicable, is being considered in the New RAT system.
[087] When BS uses a plurality of analog beams, since an analog beam, which is advantageous for signal reception, may differ between UEs, BS can consider the beam scanning operation in which the plurality of analog beams , which will be applied by the BS in a specific subframe (SF), is changed according to the symbol in relation to at least synchronization signals, system information, paging etc., in such a way that all UEs have reception opportunities.
[088] Figure 4 is a view showing an example of beams mapped to BRS symbols in hybrid spatial filtering.
[089] Figure 4 shows the beam scan operation with respect to synchronization signals and system information in a downlink transmission (DL) procedure. In Figure 4, a physical resource (or physical channel) through which the system information of the New RAT system is transmitted in a broadcast form called xPBCH (physical broadcast channel). At this time, analog beams belonging to different antenna panels can be transmitted simultaneously within a symbol and, in order to measure one channel per analog beam, as shown in Figure 4, a method of introducing a beam reference signal (BRS ), which is an RS transmitted by applying a single analog beam (corresponding to a specific analog panel), can be considered. The BRS can be defined in relation to a plurality of antenna ports and each
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27/64 BRS antenna can correspond to a single analog beam. Although the RS used to measure the beam is the BRS data in Figure 5, the RS used to measure the beam may have another name. At this time, unlike BRS, a sync signal or xPBCH can be transmitted through the application of all analog beams in an analog beam group, such that an arbitrary UE properly receives the sync signal or xPBCH.
[090] Figure 5 is a view showing symbol / subsymbol alignment between different numerologies.
Numerological characteristics of the New RAT (NR) [091] In NR, a method of supporting scalable numerology is being considered. That is, a NR carrier spacing is (2nx15) kHz and n is an integer. From a nested point of view, a subset or a superset (at least 15, 30, 60, 120, 240 and 480 kHz) is being considered as a main subcarrier spacing. The alignment of the symbol or sub-symbol between different numerologies was supported by running the control to have the same CP overload rate. In addition, numerology is determined in a structure to dynamically allocate time / frequency granularity according to services (eMMB, URLLC and mMTC) and scenarios (high speed, etc.).
Bandwidth dependent / non-dependent sequence for orthogonalization [092] In an LTE system, an SRS is designed differently according to the polling bandwidth. That is, a computer-generated sequence is used when a sequence of 24 or less in length is projected and a Zadoff-Chu (ZC) sequence is used in the case of 36 (3RB) or more. The biggest advantages of the ZC sequence are that the ZC sequence has low or low cubic metric PAPR and, simultaneously, has ideal autocorrelation and low cross-correlation properties. However, in order to satisfy such
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28/64 properties, the lengths (indicating the polling bandwidth) of the required strings must be the same. Therefore, to support UEs with different polling bandwidths, allocation to different resource regions is necessary. In order to minimize the deterioration of the channel estimation performance, the IFDMA comb structures have different polling bandwidths to support the orthogonality of the UEs to perform the simultaneous transmission. If this transmission comb (TC) structure is used in a UE with a small polling bandwidth, a sequence length can become less than a minimum sequence length (usually a length of 24) having orthogonality and, thus, CT is limited to 2. If the same CT is used in the same probing feature, a dimension to provide orthogonality is required, thus leading to the use of CDM using cyclic displacement.
[093] However, there are sequences that have correlation and PAPR performances slightly lower than those of the ZC sequences, but are capable of being mapped to resources regardless of the polling bandwidth, such as a Golay sequence and a pseudo-random sequence ( PN). In the case of a Golay sequence, when the autocorrelation values of certain a and b sequences are A _a and Ab, a and b, the sum of the autocorrelation values that satisfy the following condition are referred to as a pair of complementary Golay sequences (Aa + Ab = δ (χ)).
[094] For example, when Golay sequences of length 26 a and b are a = [1 -111-1-11 -1 -1 -1 -11-11 -1 -1 -1-111 -1 -1 -1 1 1 -1 1] and b = [- 1 1-1-111-1 1111-1-1-1-1 -1 -1-111 -1 -1 -1 1-11], the two strings are concatenated to set up a length sequence 52. In addition, when 0 is mapped to four resource elements (REs) on both sides, the autocorrelation performance shown in Figure 7 can be obtained. Figure 6 is a view
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29/64 showing autocorrelation performance of length 52 using two pairs of Golay Complementary Sequences of length 26.
[095] Figure 7 is a view showing cross-correlation between sequences having different CSs in a Golay sequence of length 52.
[096] A plurality of cyclic displacements (CSs) can be applied to sequences of length 52 to generate a plurality of Golay sequences. Cross correlation between Golay sequences having different CSs is shown in Figure 8.
[097] Figure 8 is a view showing cross-correlation and cubic metric evaluations of ZC, Golay and PN sequences.
[098] The cubic metrics (CMs) and cross correlations of the ZC, Golay and PN sequences are calculated and compared when TC is 1, 2 or 4. The assumption for evaluation is as follows.
[099] - The drilling BW is set to 4, 8, 12, 16, 20, 24, 32, 36, and 48 RBs (based on the LTE SRS project).
[0100] - Similar to the LTE system, number of 30 groups «= (/ gh ( ⁿ _s ) + A _s ) ^mod 3 ° θ determined as follows and θ determined based on a cell ID. At this time, a base v sequence is selected from 4 RBs and two base v sequence numbers are selected from the others.
[0101] - In the case of the Golay sequence, a truncated binary Golay sequence of 2-48 in length in an 802.16m system was used and a QPSK PN sequence was used as an example of independent bandwidth SRS design . At this time, to represent 30 groups in the ZC sequence, the Golay sequence was generated using 30 CSs, and the PN sequence of 30 was generated in Matlab.
[0102] -The evaluation was performed using TC = 1.2 and 4.
[0103] - In the cubic metric evaluation, an oversampling factor (OSF)
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30/64 was set to 8 for better resolution.
[0104] Referring to (a) of Figure 8, the cross correlation performance was in the order of sequence of ZC> Golay> PN, and CM performance was in the order of sequence of ZC> Golay> PN. In order to generate an SRS sequence for UL transmission, the ZC sequence performs as well as in the LTE system. However, in order to increase a degree of freedom in allocating polling bandwidth for each UE, the Golay sequence or the PN sequence may not be excluded as a candidate SRS sequence from New RAT.
[0105] SRS jump characteristics in the LTE system are as follows.
[0106] - SRS jump operation is performed only at the time of periodic SRS activation (type 0 activation).
[0107] - SRS resource allocation is provided in a predefined hop pattern.
[0108] - A hop pattern can be configured through RRC signaling in a specific UE way (however, overlap is not allowed).
[0109] - SRSs can be frequency hopped and transmitted using a hop pattern for each subframe in which a specific cell / UE SRS is transmitted.
[0110] - The initial position of SRS frequency domain and jump equation are analyzed through Equation 1 below.
Equation 1
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Μ * | fe (¼) f H% j _Ç / ¾ ^ ⁸⁰ entrants / A »
·. ' JTi>
1¾.¾ 4-2lM. ~ L | ~ H *
l.wj / '· x 1 Ί (¾ / 2j} ZT _SKS J ^ · 3Γ5 p rMcida & And the SRS c & 2ms φυ- of & STRD: ur <i ce block 2 the coniráBB wherein NSRs is a jumping interval in time domain, Nb represents the number of branches allocated to a tree level b, and b can be determined by defining Bsrs in dedicated RRC.
[0111] Figure 9 is a view showing an LTE jump pattern (ns = 1 -> ns = 4).
[0112] An example of configuring an LTE hop pattern will be described.
[0113] LTE hop pattern parameters can be set via cell-specific RRC signaling. For example, ^{SRS RB} - ^f 'can be defined. Then, LTE hop pattern parameters can be defined through specific RRC signaling
UÉ A: B _SRS = 1, b _bap = 0, n _{RR £} <= 22, T _SRS = 10
UE B: = 2 _t b _hpp = 0, n ^. = 10, T _SRS = 5. m- _n . UE C: ~ 3, b _hnn ~ 2, n _mr = 23, Z ™ = 2. . ,. . .
of EU. For example, ^{SRS hop RRC SRS} can be defined.
[0114] Table 10 below shows protocols on SRS transmission resources in NR.
Table 10> A UE can be configured with an X port SRS feature, where the SRS feature comprises one or multiple OFDM symbols within a single range
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ZFFS in which all SRS X ports are polled on each OFDM> FFS symbol at least for the purpose of acquiring CSI:
ZFFS a multi-symbol SRS resource can be configured, such that the SRS X ports on each OFDM symbol are transmitted at different locations in the band in different OFDM symbols in the range in a frequency hopping manner
-Note: This allows polling of a larger (or total) portion of the UE's bandwidth using narrower SRS transmissions
-Note: in any OFDM symbol, all X ports are polled in the same portion of the band
-Note: consider aspects of EU RF implementation in the SRS project that may bring restrictions to the design of the symbol jump pattern
For example, time required for frequency re-tuning (if re-tuning is necessary) or transient period if re-tuning is not required [0115] It has been approved that the SRS frequency hop must be supported on several SRS symbols configured in 3GPP RAN1 88 biz, and the frequency jump between the intervals in which the SRS is configured must be supported. Configuring SRS to allocate full-band uplink resources may be required, while certain SRS resources jump when a multi-symbol SRS is triggered. Configuring SRS to allocate full-band uplink resources may also be required for managing UL beams. For example, when multiple SRSs are triggered for the management of UL beams from an UE NR, it may be necessary to manage sub-band UL beams using the same Tx precoding of the UE NR.
[0116] Figure 10 illustrates the triggering of multiple symbol SRS for
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33/64 uplink beam management.
[0117] Referring to Figure 10, although the SRS UL bandwidth can be configured on one symbol, multi-symbol SRS can be triggered and configured for UL beam management etc. When the multi-symbol SRS is triggered and the same Tx pre-coding is performed on SRS resources (or SRS transmission resources) that jump across each symbol, the UE can provide more transmission power (Tx) per SRS symbol . BS can execute the selection of sub-bands through a symbol indication after detecting the SRS feature by symbol.
Proposal 1 [0118] BS can configure some or all of a combination of SRS sequence generation parameters (for example, TC (Transmission Combination), TC deviation, CS (Cyclic Displacement) and root) for SRS resources , in which the frequency jump is performed, which are changed according to the standard (frequency) of the jump, and BS can transmit the configured information to the UE or transmit changed values of the SRS sequence generation parameter values , which you want to change, for the UE.
Proposal 1-1 [0119] Like the detailed proposal in Proposal 1, in Proposal 1-1, the SRS sequence generation parameters (for example, TC, deviation from TC, CS, root etc.) configured for the Allocated SRS are applicable differently according to the frequency hopping pattern when frequency hopping is enabled. In addition, by changing the SRS sequence generation parameters according to the frequency hop without further increasing the overhead of dynamic UL downlin control (DCI) information, BS can determine whether a specific frequency hop pattern is properly performed with respect to UE after SRS detection.
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34/64 [0120] Figure 11 is illustrating the combination of SRS sequence generation parameters {^ (^ (^^)), ^ (^ (^^)) 1 according to a jump pattern CTj (/ ', n) [0121] Referring to Figure 11, when the hop pattern is configured for a UE A (where it represents a configured SRS symbol index and ^s represents a configured SRS interval index), a combination of SRS sequence generation parameters corresponding to ¹ , ^s and nf specific (nf being a frame index) can be represented by {TC ((X _A (Γ, n _s )), TC _ offset (α _λ (Γ , n _s )), CS ((% (Γ, n _s )), root (Oj (Γ, n _s ))}
Proposal 1-2 [0122] BS transmits a subset of SRS sequence generation parameters between SRS sequence generation parameters (e.g., TC, TC deviation, CS, root, etc.) configured for SRS resources, in which the frequency hop (for example, inter-range jump (or referred to as symbol level jump) or inter-range jump (or referred to as interval level jump)) is activated via radio resource control (RRC) signaling Layer 3 and transmits the remaining subset of the SRS generation parameters configured for the SRS resources allocated through Layer 1 downlink control (DCI) information (or DCI format). The configuration of the subset of the sequence generation parameters of SRS is as follows.
[0123] - BS transmits TC values, TC deviation and CS to the UE through dedicated RRC signaling and transmits root value to the UE through DCI. In order for the UE to differently apply the root value according to symbol when multiple symbol SRSs (or can be referred to as multiple symbol SRS resources) are configured in an SRS transmission interval, BS can transmit the values of corresponding to the number of multiple symbol SRSs for the UE via DCI or you can also define a root value of
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35/64 strings from multiple symbol SRSs and then transmit a root value to the UE.
[0124] - BS can transmit TC and TC deviation through dedicated RRC signaling and transmit CS and root values via DCI.
[0125] - The BS can transmit only the TC value through dedicated RRC signaling and transmit deviation of TC, CS and root values through DCI.
[0126] - BS can transmit only the CS value through dedicated RRC signaling and transmit the remaining subset (for example, TC, deviation from TC and root) via DCI.
[0127] - BS can transmit only the root value through dedicated RRC signaling and transmit the remaining subset (for example, TC, deviation from TC and CS) via DCI.
[0128] - BS can transmit various combinations of CT, deviation from CT, CS and root values through DCI or RRC signaling.
[0129] The UE can generate sequences by variously combining SRS sequence generation parameters according to hop, thereby improving PAPR or low correlation properties. However, the overhead can be high due to the transmission of DCI.
[0130] Figure 12 illustrates the collision between UEs when the jump is performed.
[0131] As a modality, 1) when the indexes of sequence parameters in resource to be allocated in the transmission interval of SRS 1 are TC = 1, deviation from TC = 0, CS = 5 and root = 10, the indexes of sequence parameters in resource to be allocated in the next SRS transmission interval 2 are changed to TC = 1, TC deviation = 0, CS = 8 and root = 11. In the SRS transmission interval 2, CS = 8 and root = 11 can be transmitted via DCI or inferred by a hop pattern.
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36/64 [0132] As another embodiment, when a truncated ZC SRS sequence is used, different resources in the SRS 1 transmission interval are allocated to UE 1 and UE 2. However, in the following SRS transmission interval 2 , the resources of UE 1 and UE 2 overlap in terms of a specific SRS symbol index and CS = 3 of UE 1 and CS = 3 of UE 2 are applied and thus BS changes CS = 3 of UE 2 for CS = 5 of UE 2, thus maintaining low correlation properties.
Proposal 1 -3 [0133] As a combination of sequence generation parameters (eg TC, deviation from TC, CS and root) configured for SRS features in which the frequency hop (eg, inter-range hop, inter-range hop etc. .) is activated in order to reduce the overhead of DCI signaling, the BS can transmit a specific set to the UE through RRC signaling and transmit DCI including a request field to the UE and the UE can acquire information about a combination of sequence corresponding to SRS resources in which the jump is performed. As an embodiment, Table 11 below shows a set of sequence generation parameters transmitted by BS through DCI.
Table 11
Sequence request field (symbol level jump) ‘00’ ΌΤ ‘10’ ‘11’ Sequence generation parameter combination TC = 2, deviation from TC = 0, CS = 4, root = 10 TC = 2, deviation from TC = 1, CS = 8, root = 11 TC = 4, deviation from TC = 0, CS = 11, root = 2 TC = 4, deviation from TC = 3, CS = 7, root = 3
[0134] When the UE receives the request field for the sequence generation parameter in the SRS allocation resource (for example, interval) indicating “01” through DCI, a sequence for the transmission of SRS in the corresponding resource (for example, corresponding interval) can be generated using TC = 2, deviation from TC = 1, CS = 8 and root = 11. When the number of multiple
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SRS in the SRS range is 2, the UE can continuously receive the “00” and “10” request fields from the BS. In this case, the UE can generate the SRS sequence on a first SRS symbol using TC = 2, deviation from TC = 0, CS = 4 and root = 10 and generate the SRS sequence on a second SRS symbol using TC = 4, TC deviation = 0, CS = 11 and root = 2. Alternatively, when the request field indicates “10”, the UE can generate the same SRS sequence in two symbols using TC = 4, TC deviation = 0 , CS = 11 and root = 2.
Proposal 1 -4 [0135] BS can configure which sequence generation parameters (for example, TC, TC deviation, CS and root values) configured for SRS feature, in which the frequency hop (for example, hop inter-interval or inter-interval jump) is activated, do not change when the frequency jump is performed. This may be desirable when the jump is performed with the most general sequence generation parameter setting, a region of frequency overlapping in a specific SRS instance is avoided or a jump pattern is generated so that low correlation is achieved in the region overlap frequency.
Proposal 2 [0136] A method of frequency hopping configuration can be divided into interval level frequency hopping (inter-interval hopping) and symbol level frequency hopping (inter-hopping configuration).
- Parameters for inter-hop jump configuration [0137] When parameters for inter-hop jump configuration include SRS resource position information: parameters for inter-hop jump configuration can include a value indicating an SRS resource allocation band and position of SRS SRS resource allocation in each interval (for example, an initial SRS allocation resource (RE) value, an RB (Block
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38/64 Resource) initial SRS allocation, a final SRS allocation SR value, a final SRS allocation RB value, and a value indicating an SRS transmission range and a frequency position for each interval (for example, RIV (resource indication value), a subband index applied within a range, a partial band index applied within a range etc. for each specific UE), an inter-interval hop cycle, an Interval jump activation indicator, etc.) [0138] When the jump pattern is used: parameters for inter interval jump configuration can include an inter interval jump cycle, an inter interval jump activation indicator and an inter interval jump pattern.
- Parameters for intra-interval hop configuration [0139] When parameters for intra-interval hop configuration include SRS resource position information: parameters for intra-interval hop configuration can include a value indicating the SRS resource allocation position in each symbol (for example, a RIV (resource indication value), an RE / RB index, a subband index, and a partial band index), the number of SRS symbols configured in the SRS transmission interval, and an index , an intra-interval hop cycle, an intr-interval jump activation indicator, etc.
[0140] When the hop pattern is used: the parameters for setting the intra-interval hop can include the number of SRS symbols configured in the SRS transmission interval and an index, an intra-interval hop cycle, an intra-interval hop pattern, an intralance jump activation indicator, etc. BS can transmit such parameters to the UE according to the following configuration.
[0141] The hop configuration can be two combinations of intralay / inter-hop jump and the hop cycle can be defined as follows. The intra-interval hop cycle can be defined as the number of SRS symbols until the SRS resource is allocated according to the number of SRS symbols jumping in
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39/64 certain SRS intervals and return to an original SRS frequency position. The inter-hop jump cycle can be defined as the number of SRS intervals until an SRS resource jumps in SRS intervals and returns to an original SRS frequency position.
Proposal 2-1 [0142] In the case of periodic / semi-persistent SRS, BS can transmit the parameters for the configuration of inter-range hop to the UE through dedicated RRC signaling and transmit the parameters for the configuration of inter-range hop to the UE via DCI for the SRS transmission interval. The DCI signaling overhead is high at each SRS transmission interval, but inter-hop hop information can be dynamically acquired to flexibly configure the inter-step. As a modality, an example of transmission of parameters for the inter-hop jump via RRC signaling and transmission of the parameters for inter-hop hop configuration via DCI when periodic / semi-persistent SRS activation is performed will be illustrated.
[0143] Figure 13 illustrates an example of transmission of inter-hop parameters via RRC signaling and transmission of inter-hop parameters via DCI signaling.
[0144] Referring to Figure 13, as an example of RRC signaling (dedicated) for intra-interval hop configuration, the following information is transmitted via RRC signaling (dedicated): the initial configuration RB index (allocation) SRS = 1, the final RB configuration (allocation) index of SRS = 17, the SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position index of the configured SRS = 8, the final symbol position index of the configured SRS = 11, the partial band index = 1, and the symbol jump cycle = 4 symbols.
[0145] Referring to Figure 13, as an example of DCI signaling for
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[0146] - The DCI for the first SRS interval can indicate the initial SRB index of SRS = 1, the final RB index of SRS = 65, the partial band index = 1, the inter-interval hop cycle: 2 intervals of SRS etc.
[0147] - The DCI for the second SRS interval can indicate the initial SRS allocation RB index = 65, the final SRS allocation RB index = 129, the partial band index = 1, and the inter-interval jump: 2 SRS intervals etc.
[0148] The inter-interval / intr-interval jump pattern can be understood by the following example. In NR, when the number of intervals in a frame ^f and ^Ns , the index of each interval is expressed as ⁿ , ^{1 * * * * *} is the SRS symbol index T n configured and ^SRS is an SRS transmission cycle , ^SRS for the jump can be configured as shown in Equation 2 below.
Equation 2 _ ^ SRS = kr + F {i, _b , _n ,, _n „T _s ^ +« SRS = ¹
J J
F (i τι τι T) where ⁷ ' ^s ' ^{SI! S} is a function of the intralevel jump position of
B according to a subband index ^sb . ^SRS spans a subband of SRS.
F (i _h , n _f , n, T ^) = (i _h (n _f , n. BW _h . I—> i— ^{Vsi> fs SRS fs SRS sh} and ^sb and the number of REs indicating ai i_ i_ _i ih (ri _f , n = c (n _f , n, T _ÇPÇ ) mod /, I _,, subband bandwidth. ^{fs SRS vfs SRS sh} and ^sb and a total number of subbands. is a function encryption.
[0149] Figure 13 shows an example in which, after the jump is performed in one localized frequency region, the jump configuration in another localized frequency region is activated in a next SRS transmission interval. In a UE having a narrow band RF, it is advantageous to perform the jump in one region of localized frequency and perform the jump in another region of frequency located in the next interval considering the return delay.
[0150] As another example, when periodic SRS triggering occurs, the
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BS can transmit parameters for the inter-hop jump via RRC signaling and transmit parameters for inter-hop hop configuration via DCI signaling.
[0151] Figure 14 illustrates the case in which a BS transmits parameters of inter-hop jump through DCI signaling and transmits parameters of inter-hop jump via RRC signaling.
[0152] - DCI transmission example for inter-hop jump configuration: BS can indicate the SRS sub-band index (1 to 64 RBs) = 1, the partial-band index = 1 and the inter-hop jump cycle = 2 SRS intervals, in DCI for the first SRS interval. The BS can indicate the SRS subband index (1 to 64 RBs) = 2, the partial band index = 1, and the inter-interval hop cycle = 2 SRS intervals, in DCI for the second SRS interval.
Proposal 2-1-2 [0153] In the case of periodic SRS and / or semi-persistent SRS, BS can transmit parameters for inter-hop jump configuration to the UE through RRC signaling (dedicated) and transmit parameters for intr-interval hop configuration for the UE through DCI for the SRS transmission interval.
[0154] This can be considered when the intra-interval jump is applied flexibly in a fixed inter-interval jump pattern. However, the parameter transmission overhead for the inter-interval jump is high.
[0155] Figure 15 illustrates the case in which a BS transmits parameters of intra-interval hop through RRC signaling and transmits parameters of inter-interval hop through DCI according to Proposal 2-1-2.
[0156] As a modality, at the time of transmission of periodic / semi-persistent SRS, BS can transmit parameters for inter-hop jump configuration through RRC signaling and transmit parameters for inter-hop jump configuration via DCI (when the resource position of
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SRS of each symbol is designated). This will now be described with reference to Figure 15.
[0157] - Example of RRC signaling transmission (dedicated) for inter-hop jump configuration: RRC signaling (dedicated) for inter-hop jump configuration can indicate the initial RB allocation index of SRS = 1, the RB index end of SRS allocation = 129 RBs, the partial band index = 1, and the inter-interval hop cycle = 2 SRS intervals.
[0158] - Example of DCI transmission for inter-interval hop configuration: the DCI for the first SRS interval can indicate the SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the position initial SRS symbol set = 8, final configured SRS allocation symbol position = 11, partial band index = 1, and symbol jump cycle = 4 symbols. As shown in Figure 15, the DCI for the first SRS range indicates the first symbol SRS initial RB index = 1, the first symbol SRS final RB index = 17, the second initial SRS RB index of symbol = 17, the second symbol SRS final RB index = 33, the third symbol SRS initial RB index = 33, the third symbol SRS final RB index = 49, the fourth initial RB index of Symbol SRS = 49, and the fourth final RB index of symbol SRS = 65.
[0159] The DCI for the second SRS interval can indicate the SRS BW = 32 RBs, the number of SRS symbols configured in the SRS transmission interval = 2, the initial symbol position of the configured SRS = 8, the position of final symbol of the configured SRS = 9, partial band index = 1, and the symbol jump cycle = 2 symbols. As shown in Figure 15, the DCI for the first SRS range indicates the first symbol SRS initial RB index = 65, the first symbol SRS final RB index = 97, the second initial RB index for Symbol SRS = 97, and the second final SRB allocation index of symbol SRS = 129.
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43/64 [0160] As another modality, at the time of transmission of periodic SRS, BS can transmit parameters for inter-hop jump configuration through RRC signaling and transmit parameters for inter-hop jump configuration via DCI (however, the position of each symbol's SRS feature is determined by the inter-range jump pattern).
[0161] The RRC signaling (dedicated) for inter-hop jump configuration can indicate the initial RB allocation index of SRS = 1, the final RB allocation index of SRS = 129, partial band index = 1, and the inter-interval jump cycle = 2 SRS intervals.
[0162] The RRC signaling (dedicated) for intralevel jump configuration can indicate the SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position of the configured SRS = 8 , the final symbol position of the configured SRS = 11, the partial band index = 1, the subband index in a partial band = 1, and the symbol jump cycle = 4 symbols. The DCI for the second SRS interval can indicate SRS BW = 32 RBs, the number of SRS symbols configured in the SRS transmission interval = 2, the initial symbol position of the configured SRS = 8, the final symbol position of the Configured SRS = 9, the partial band index = 1, the subband index in a partial band = 2, and the symbol jump cycle = 2 symbols.
Proposal 2-1-3 [0163] In the case of periodic / semi-persistent SRS, the BS can transmit parameters for the configuration of inter-interval frequency hopping and parameters for the configuration of inter-interval hopping to the UE through RRC signaling (dedicated). The configuration of Proposal 2-1-3 has the least overhead for the frequency jump. When applying inter-interval and inter-interval jump, the jump is regularly performed according to the jump pattern.
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44/64 [0164] Figure 16 illustrates an example of transmission of parameters for the configuration of intra-interval jump and parameters for configuration of inter-interval jump through RRC signaling according to Proposal 2-1-3.
RRC example (dedicated) for inter-hop jump configuration [0165] Dedicated RRC signal for inter-hop jump configuration can indicate the initial SRB allocation index of SRS = 1, the final SRB allocation index of SRS = 129, the partial band index = 1, and the inter-interval hop cycle = 2 SRS intervals.
Example of RRC (dedicated) for inter-hop jump configuration [0166] Dedicated RRC signal for intr-interval hop configuration can indicate the initial SRB allocation index of SRS = 1, the final SRB allocation index of SRS = 17, the SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position of the configured SRS = 8, the final symbol position of the configured SRS = 11, the partial band index = 1, and the symbol jump cycle = 4 symbols.
Proposal 2-1-4 [0167] In the case of periodic / semi-persistent SRS, the BS can transmit parameters for inter-hop hop configuration and parameters for intravarge hop configuration via RRC (dedicated) and can transmit some parameters via DCI to the skip information from the SRS transmission interval. By acquiring dynamic information from specific parameters, flexible configuration can be enabled at the time of the jump. In this case, the overhead is not great.
Example of PCI transmission of some hop parameters [0168] Dedicated RRC signaling for inter-hop jump configuration can indicate the initial SRB allocation index of SRS = 1, the final SRB allocation index of SRS = 129, the index partial band = 1, and the inter-hop cycle = 2 SRS intervals. Dedicated RRC signaling for jump configuration
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45/64 intra-range can indicate SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position of the configured SRS = 8, the final symbol position of the configured SRS = 11 , the partial band index = 1, and the symbol jump cycle = 4 symbols.
PCI for inter-interval hop configuration [0169] The DCI for the first SRS interval can indicate the SRS subband index (1 to 64 RBs) = 1. The DCI for the second SRS interval can indicate the subband index SRS (1 to 64 RBs) = 2.
Proposal 2-1-5 [0170] In the case of periodic / semi-persistent SRS, during the jump cycle (from when the jump is performed on the initial jump resource to the return to the position of the initial jump resource), a parameter ( for example, a jump deviation value) to differentiate an inter-symbol jump pattern at the time of the next jump is defined. This parameter can be transmitted via DCI or RRC signaling.
[0171] The jump deviation according to Proposal 2-1-5 can differentiate the jump pattern in a predetermined time, thus dispersing the interference that occurs at the moment of the jump. As a modality, a parameter to differentiate the jump pattern according to the jump cycle is applicable.
[0172] Figure 17 is a view showing an example of the application of different patterns of intra-interval jump for each jump cycle.
h [0173] When considering a ^shift parameter to change the jump pattern h intranterm for each jump cycle, BS can transmit ^shift to the UE through h T
DCI at each jump or ^shift cycle is expressed according to ^hoppmg in Equation 3, such that the jump is performed with an intra-interval jump pattern other than the intra-interval jump pattern used in a previous jump cycle as shown in Figure 15.
T - A-slot [0174] When ^hopping hop cycle, Equation 3 below is obtained.
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Equation 3 «SRS = (^ + ¼) modi 'h
shift (n _f xN _s + n _s ) / / T / hopping where L 'represents the number of SRS symbols allocated to an SRS interval.
T [0175] ^hopplng can be expressed using the length of an SRS resource
T 'allocated to a symbol, a length of UL BW, ^SKS and 7. That is, bw _ul /
- _r _ / BW _srs ^
Proposal 2-2-1 [0176] In the case of aperiodic SRS, BS can configure parameters for inter-interval hop configuration and parameters for intr-interval hop configuration and transmit to the UE through RRC (dedicated) or MAC-CE. When the BS transmits via MAC-CE, the valid period (or interval) of the jump parameters transmitted via MAC-CE is determined using an activation signal, a deactivation signal or a timer. The jump can be performed whenever the SRS is dynamically triggered with a predefined intra-interval / inter-interval jump pattern. In this case, the overhead is also small.
[0177] Figure 18 is a view showing an example of application of the same intra-interval jump pattern at the time of the aperiodic SRS transmission.
[0178] Parameters for the configuration of inter-range jump and parameters for configuration of inter-range jump can be configured / transmitted through RRC signaling (jump in a specific sub-band is applied).
[0179] The RRC signaling (dedicated) for inter-interval hop configuration can indicate the initial SRB allocation index of SRS = 1, the final SRB allocation index of SRS = 129, the subband index = 1, and the partial band index = 1. The RRC signaling (dedicated) for the inter-hop jump configuration can indicate the SRS BW = 16 RBs, the number of SRS symbols configured in the
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47/64 SRS transmission interval = 4, the configured SRS initial symbol position = 8, the configured SRS final symbol position = 11, the subband index = 1, the partial band index = 1, and the symbol jump cycle = 4 symbols.
[0180] As shown in Figure 18, parameters for inter-interval hop configuration and parameters for intr-interval hop configuration are configured / transmitted through RRC signaling, and the aperiodic SRS is triggered in the SRS 1 interval, SRS 5 interval and interval de SRS 12. If «srs = ^ 1 (^) _s « srs = «ι (Ό θ« srs = ^α ι (Ό f _or in configurations, the standard jump symbol can also be applied.
[0181] Figure 19 illustrates the application of different patterns of intra-interval jump at the time of transmission of aperiodic SRS.
[0182] If ^ 8 ^ 1 = (/ 4) "SRS arXZ = 5) m _SRS = θ ^ (/ 42) f _pray configured as shown in Figure 19, different patterns can appear intraintervalo per interval. As another modality, BS can configure / transmit parameters for the configuration of inter-range jump and parameters for configuration of inter-range jump through RRC signaling (jump in a partial band is applied).
[0183] Figure 20 is a view showing an example of the application of different patterns of intra-interval jump (jump over a partial band) at the moment of transmission of aperiodic SRS.
[0184] RRC signaling (dedicated) for inter-interval hop configuration can indicate the initial SRS allocation RB index = 1, the final SRS allocation RB index = 129, and the partial band index = 1. The RRC signaling (dedicated) for inter-hop jump configuration can indicate the SRS BW = 32 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position of the configured SRS = 8, the position end symbol of the configured SRS = 11, the partial band index = 1, and the symbol jump cycle = 4 symbols.
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48/64 [0185] As shown in Figure 20, parameters for inter-interval hop configuration and parameters for intr-interval hop configuration are configured / transmitted through RRC signaling and the aperiodic SRS is triggered in the SRS 1 interval, SRS 5 interval interval and SRS 12. If ^ 8 ^ 1 = (/, 1), ^ = ^ (/ 5) = θ ^ 71 ^ (/ 12) f _pray configured intraintervalo different patterns may appear per interval.
Proposal 2-2-2 [0186] In the case of the aperiodic SRS, BS can configure / transmit parameters for inter-hop jump configuration through RRC signaling (dedicated) and configure / transmit parameters for intr-interval hop configuration via DGI when the SRS is triggered. In contrast, BS can configure / transmit parameters for inter-interval hop configuration via DGI whenever SRS is triggered and configure / transmit parameters for intr-interval hop configuration via RRC signaling (dedicated).
[0187] The BS can dynamically provide information about parameters for the intra-interval jump and inter-interval jump for the UE whenever the SRS is activated. Obviously, in this case, the BS signaling overhead can be high.
[0188] Figure 21 is a view showing an example of the application of different patterns of intra-interval jump (jump over a specific sub-band) at the time of transmission of aperiodic SRS. As a modality, in the case of the aperiodic SRS, BS can configure / transmit parameters for inter-hop hop configuration via RRC signaling (dedicated) and transmit parameters for intra-hop hop configuration via DCI. In Figure 21, the SRS is aperiodically triggered when the SRS interval positions are indexes of 1, 5 and 12. The BS can transmit the following information to the UE when indicating that the aperiodic SRS is triggered. RRC signaling (dedicated) for inter-hop jump configuration can indicate the initial SRB allocation index of SRS = 1, the index
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49/64 SRS final allocation RB = 129, and the partial band index = 1.
[0189] As an example of DCI transmission for inter-interval hop configuration, the DCI for SRS 1 intervale can indicate SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the position initial symbol position of the configured SRS = 8, the final symbol position of the configured SRS = 11.0 partial band index = 1, the subband index in a partial band = 1, and the symbol hop cycle = 4 symbols. The DCI for SRS 5 interval can indicate SRS BW = 32 RBs, the number of SRS symbols configured in the SRS transmission interval = 2, the initial symbol position of the configured SRS = 8, the final symbol position of the SRS set = 9, the partial band index = 1, the subband index in a partial band = 2, and the symbol jump cycle = 2 symbols. The DCI for SRS 12 interval can indicate SRS BW = 16 RBs, the number of SRS symbols configured in the SRS transmission interval = 4, the initial symbol position of the configured SRS = 8, the final symbol position of the SRS set = 11, the partial band index = 1, the subband index in a partial band = 1, and the symbol jump cycle = 4 symbols.
[0190] At this point, if a value indicating the intraday interval pattern is "srs" srs = arXZ, 5) θ (^ θι-θη ^ intraday patterns can be configured by interval.
Proposal 2-2-3 [0191] In the case of aperiodic SRS, BS can configure / transmit information about a specific set of parameters for inter-hop jump configuration and / or parameters for inter-hop jump configuration for the UE through RRC signaling or DCI including the requisition field. In this case, the signaling overhead can be significantly reduced.
[0192] Figure 22 illustrates the SRS transmission according to the request field transmission using a set of jump parameters at the time of
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[0193] Table 12 below shows a set of parameters for intralevel jump configuration according to Proposal 2-2-3.
Table 12
Request field (in case of symbol level jump) ‘00’ Ό1 ’ ‘10’ ‘11’ Parameter values for intra-interval hop configuration SRS BW = 16 RBsNumber of SRS symbols configured in SRS transmission interval = 4Initial SRS symbol position configured =8Configured SRS end symbol position = 11partial band index = 1subband index in a partial band = 1symbol jump cycle = 4 symbols SRS BW = 16 RBsNumber of SRS symbols configured in SRS transmission interval = 4Initial SRS symbol position configured =8Configured SRS end symbol position = 11partial band index = 1subband index in a partial band = 2symbol jump cycle = 4 symbols SRS BW = 32 RBsNumber of SRS symbols configured in SRS transmission interval = 2Initial SRS symbol position configured =8Configured SRS end symbol position = 9partial band index = 1subband index in a partial band = 1symbol jump cycle = 2 symbols SRS BW = 32 RBsNumber of SRS symbols configured in SRS transmission interval = 2Initial SRS symbol position configured = 10Configured SRS end symbol position = 11partial band index = 1subband index in a partial band = 2symbol jump cycle = 2 symbols
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51/64 [0194] As shown in Figure 22, the periodic SRS is triggered on interval indices whose SRS interval positions are 1, 5 and 12. Figure 22 shows the BS transmitting DCI to the UE. It is illustrated that DCI indicates the requisition field for the SRS 1 interval of "00", DCI indicates the requisition field for the SRS 5 interval of "01" and DCI indicates the requisition field for the SRS 12 interval “11” from BS to UE.
Proposal 2-2-4 [0195] In the case of the aperiodic SRS, BS can configure / transmit a set of an inter-interval hop pattern via RRC signaling, and BS can transmit an inter-interval hop request field via DCI when multiple aperiodic SRS symbols are triggered. When the SRS is triggered, different jump patterns can be flexibly configured between multiple SRS symbols. Table 13 below shows the symbol level jump request field.
Table 13
Intersection jump request field ‘00’ ‘01 ’ ‘10’ ‘11’ Jump pattern function F (0, n _f , n _s , T _SRS ) F (l, n _f , n _s , T _SRS ) F (2, n _f , n _s , T _SRS ) F (3, n _f , n _s , T _SRS )
Proposal 2-2-5 [0196] BS can configure / transmit a set indicating a combination of a set of intra-interval jump pattern (for example, the jump request fields ΌΟ ', '01', '10' and ' 11 'shown in Table 13) and a set of sequence parameters (for example, TC, deviation from TC, CS, root etc.) through RRC signaling and transmit one or a plurality of request fields to apply the interval in SRS is triggered, through DCI DE UL. For example, Table 14 shows the request field for the set of sequence parameters
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Table 14
Request field ‘00’ ‘01’ ‘10’ ‘11’ Jump pattern function F (Q, n _f , n _s , T _SRS ) F (l, n _f , n _s , T _SRS ) F (2, n _f , n _s , T _SRS ) F (3, n _f , n _s , T _SRS ') sequence parameter set index 0 1 2 3
[0197] The UE can select the set of sequence parameters and jump pattern indicated by the request field received via DCI, generate an SRS sequence and transmit an SRS.
Proposal 2-2-6 [0198] When multiple aperiodic SRS symbols are triggered, a trigger counter (N) is introduced. BS can configure / transmit drive counter N via DCI or RRC signaling.
[0199] Figure 23 illustrates the jump when activating counter N = 3.
[0200] In ^{SRS fans} , n cannot indicate the number of times the multiple aperture SRS symbols are triggered starting from a reference UL interval.
Proposal 2-3 [0201] In the case of semi-persistent SRS, for intra-interval jump and / or inter-interval jump, BS can configure / transmit parameters for jump execution and jump termination operations (for example, an interval index triggered by SRS at which symbol / interval level jump starts, semi-persistent frequency jump activation, an SRS-triggered interval index, at which symbol / interval level jump ends, and semi-persistent frequency jump jump) to the UE via of DCI or MAC-CE. A timer for the jump deactivation can operate at the time of activation.
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53/64 [0202] When the semi-persistent SRS is activated and the jump is activated, parameters for the jump configuration become valid and, when the jump is reactivated, parameters for the jump configuration do not become valid.
Proposal 2-4 [0203] For a UE located on a cell edge to acquire SRS receiving power, BS can define the SRS symbol repetition number, allocate SRS resources in the same position up to the repetition number and configure to perform the jump on a next SRS symbol or a next SRS interval. In this case, BS can transmit information about the SRS symbol repetition number to the UE via RRC or UL DCI signaling. Therefore, the receiving side (the BS) can combine the SRS symbols allocated to the same frequency resources by the repetition number [0204] Figure 24 illustrates the symbol level jump when the repetition number = 2 (repetition r = 2).
[0205] As shown in Figure 24, in the case of the repetition number (r = 2) of, T = 2T symbol, when L = 4 θ srs, _{in the case of} periodic srs,
I / ^z / I NSRS symbol (λΐ. X N .. “1“) / ⁿ SRS
T ^{SRS J} can be expressed.
N
SRS _ symbol θ q ηυρΠθΓΟ of SRS symbols configured in the configured SRS interval. In the case of aperiodic SRS, since only configuration in an interval may be necessary, n = I / srs / _r , ^{L / rj} can be expressed.
Proposal 2-4-1 [0206] The UE located at the cell edge can perform full UL bandwidth transmission on multiple symbols configured to acquire SRS reception power. In this case, the sequence parameters, the pre-coding vectors mapped to the SRS resources and the ports can be applied equally.
Proposal 2-5 [0207] It is possible to support SRS jump through a single configuration of
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54/64 jump integrating inter-interval and / or inter-interval hop configuration. At this time, the parameters can be as follows.
[0208] When information about the parameters for the single hop configuration includes SRS resource position information: information about the parameters for the single hop configuration can include information about a value indicating the SRS resource allocation position in each symbol starting from a jump enable symbol (for example, RIV (resource indication value), RE / RB index, subband index and partial band index), the number of SRS symbols configured in the interval SRS transmission and index, the inter-hop cycle, the inter-hop cycle, a hop-on indicator indicating whether hop is enabled, etc.
[0209] When the hop pattern is used, information about the parameters for the single hop configuration can include the number of SRS symbols configured in the SRS transmission interval and the index, the symbol level hop cycle, the interval level jump cycle, the inter-interval and / or inter-interval jump pattern, the jump activation indicator, etc.
[0210] Figure 25 illustrates a jump pattern according to the SRS symbol number.
[0211] As a modality, the use case of the jump pattern will be described.
Example of RRC signaling (dedicated) for the frequency hop configuration [0212] The RRC signaling (dedicated) for the frequency hopping configuration can include SRS BW = 32 RBs, the number of SRS symbols configured in the interval SRS transmission rate ( ^{Ns / is} - ^symbo1 ) = 4, the initial symbol position (or index) of the configured SRS = 8, the final symbol position (or index) of the configured SRS = 11, the band index partial = 1, the symbol jump cycle
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Τ Τ symbol_h _Oppl n _g _ 3 symbols, and ο interval jump cycle ^s iot_ho _Ppmg ⁿ SRS
When / + Ninth ο ϊ X SRS _ symbol (n _f xN _s + n _s ) / / T / ^± SRS
J rj-i * symbol _hopping
T ^SRS intervals.
is configured (here, nSRS is a jump interval in the time domain), as shown in Figure 25, the jump pattern may not be changed according to the SRS interval, but it can be formed according to the number of symbols of SRS.
[0213] Figure 26 illustrates a jump pattern according to the number of SRS symbols (when the number of SRS symbols in an SRS interval is less than a symbol jump cycle).
[0214] As another modality, the case of using the jump pattern will be described. In the example in Figure 25, the jump is easily applicable even when the number of symbols in an SRS interval is less than the symbol jump cycle.
RRC (dedicated) example for the frequency hop configuration [0215] RRC (dedicated) signaling for the frequency hop configuration can include information about the system bandwidth (SRS BW = 32 RBs), the number of SRS symbols configured in the SRS transmission interval (N ™ ³ -vmboi) = 2, the initial symbol position (or the index) of the configured SRS = 8, the final symbol position (or the index) of the configured SRS = 9, the partial T band index = 1, the symbol jump cycle ° ymboi_ho _Ppmg _ 3 symbols, and 0
Τ ΊΤ ^slot interval = srs intervals. Jump interval in the nSRS ⁿ SRS time domain can be configured as l '+ N ^L ~ ^ly SRS_symbol (n _f x. ', + Ii.) / / Ί / ¹ SRS d T symbol _hopping
Proposal 3 [0216] If the symbol level jump is configured in the periodic / aperiodic / semi-persistent SRS, the RRC configuration of the jump pattern parameter and DCI configuration of the SRS resource position information can be performed by one of the following operations in order to support the jump between the partial bands.
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56/64 [0217] The symbol level jump pattern parameters including the partial band index can be configured / transmitted via RRC signaling. The BS can configure / transmit the partial band index via DCI whenever multiple SRS symbols are transmitted and configure / transmit symbol level jump pattern parameters via RRC signaling. The partial band index can be replaced by other information indicating the frequency position to designate the partial band (for example, RIV indicating the partial band range and position, initial partial band RE / RB, and final RE / RB).
[0218] Figure 27 is a view showing the description of Case 1 -1.
[0219] Case 1: a jump pattern between SRS symbols is applied in a partial band and jump to another partial band is performed in an interval triggered by the next SRS. As in Case 1-1, as shown in Figure 27, the jump pattern between symbols in the interval triggered by the next SRS can be the same as the previous jump pattern.
[0220] As a modality, the configuration of the symbol level jump pattern including the partial band index will be described.
[0221] In NR, when the number of intervals in an ^nf frame is ^Ns , the
M j / M index of each interval is ^s , and ^{1 * * *} is the symbol index of the configured ^SRS , ^SRS for the jump can be configured as shown in Equation 4 below.
Equation 4 _ Ars q> = * << ”+ f (í, _s , _{(I /} , _(i „ t _sss ) + £ w _tc CX ΊΊ - l
SRS 'Z = 0 jj yz í j τι T) where ^{/ A} ' ⁷ ' ^s ' ^SRS is a jump position function according to the i B partial band index ^bp . ^SRS extends in a partial band. F (i., N _f , n, T ^) = (i. (N _f , n, T ^) - V) XBW _h BW. . ,. m-. ...
^{y pb} f 's' srs · ' _P b f' s 'srs' pb pb qq number of REs indicating the
I. . . . . . I iu (n _f , n, 74.,) = C (n _f , n, T, „,) mod7, I,, bandwidth of the partial band. ^{pb fs SRS fs SRS pb} . ^bp and a total number of partial bands. it is an encryption function.
[0222] As another modality, the transmission of the partial band index by the
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BS through DCI and the symbol level jump pattern will be described.
[0223] In Equation 4 above, ^lpb is transmitted by BS through DCI in each F (i η η T) interval, in which the SRS is transmitted, and the value of ^f ' ^s ' ^SRS is configured using ^lpb .
[0224] Figure 28 is a view showing the description of Case 1-2.
[0225] Case 1-2: information about the hop pattern can include a value indicating the partial band index or the partial band (RB and / or RE of the partial band), and BS can configure the information about the pattern specific jump form of the UE. As an embodiment, the symbol level jump pattern configuration including the partial band index of Figure 28 can be expressed as shown in Equation 5 below.
(n _f xN _s + n _s ) __ ^ SRS
V ”= V + F (i _rÍ , n _f , n„ T _sss V'Z, ' _K ^ MZn _Í where it extends in a partial band.
[0226] The following can be considered taking into account a repetition symbol.
(n _f XN _S + nj __ ^ SRS k ⁽ 0 ^P> = k ^ ^p> + F (ipb, n _f , n _s , T _SRS ) + ^ K _TC M ^ _b n _b [0227] Figure 29 is a view showing the description of Case 2.
[0228] As in Case 2, as shown in Figure 29, the hop pattern irrelevant for the partial band in the interval in which multiple SRS symbols are configured is applicable.
[0229] As an embodiment, an example of the hop pattern irrelevant for the partial band in the interval in which multiple SRS symbols are configured can be expressed as shown in Equation 6 below.
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58/64
Equation 6 //. ,, <= / + N. í X
SRS SRS _ symbol (n _f xN _s + n _s ) / / T / * SRS n _b = {n _b + F _b (n _SRS )} modN _b where ^Ssrs encompasses total UL BW.
[0230] The following can be considered taking into account a repetition symbol.
ⁿ SRS
N ’SRS _ symbol
n _b = {n _b + F _b (n _SRS )} modN _b [0231] Figure 30 is a view showing the description of Case 3.
[0232] According to Case 3, the frequency jump between the partial bands can be canceled, (a) of Figure 30 shows a fixed intralange jump pattern and (b) of β
Figure 30 shows another inter-hop pattern. ^SRS can be configured to extend in the partial band.
Proposal 4 [0233] A method of transmitting information about parameters for configuring inter-interval frequency hopping supporting hopping between partial bands in a periodic / aperiodic / semi-persistent SRS is proposed.
Proposal 4-1 [0234] BS can configure / transmit information about the SRS frequency resource position, the number of SRS symbols in the SRS-triggered interval, the SRS symbol position and the position of the partial band transmitted to the UE through RRC signaling (for example, RRC signaling dedicated to the EU).
[0235] Figure 31 is a view showing the configuration of a fixed SRS resource position at the time of periodic / aperiodic SRS transmission.
[0236] The structure of Figure 31 is possible when only inter-interval hopping in a specific partial band is supported and can improve the SRS reception performance by combining energy from the continuously concatenated SRS symbols.
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Proposal 4-2 [0237] BS can configure / transmit information about the SRS frequency resource position, the number of SRS symbols in the SRS-triggered interval and the SRS symbol position through RRC signaling (for example , RRC signaling dedicated to the EU) and configuring / transmitting the partial band position transmitted via DCI.
Proposal 4-3 [0238] BS can configure / transmit information about the SRS frequency resource position, the number of SRS symbols in the SRS-triggered interval and the SRS symbol position through RRC signaling (for example , RRC signaling dedicated to the EU) and configure the transmitted partial band position using the inter-hop pattern.
[0239] Figure 32 is a view showing the jump configuration between partial bands at the time of periodic / aperiodic activation.
[0240] As shown in Figure 32, the position of the partial band can be dynamically changed. As an embodiment, an example of the inter-interval hop pattern (an example of the jump between partial bands) can be expressed as shown in Equation 7 below.
Equation 7 ⁿ SRS
N * SRS _ symbol n _f * N _s k
ipb ( ⁿ SRS) ^{- C} ( ⁿ SRS) mod I _pb ^fb SRS [0241] In consideration
of a repetition symbol,, _P b srs · ' srs ·' pb can be expressed.
Proposal 4-4 [0242] BS can configure / transmit information about the SRS frequency resource position through RRC signaling (dedicated) and configure / transmit information about the number of SRS symbols and the position of
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60/64 partial band through DCI.
Proposal 4-5 [0243] BS can configure / transmit information about the SRS frequency resource position through RRC signaling (dedicated) and configure information about the number of SRS symbols and the partial band position using the standard inter-interval jump.
[0244] Figure 33 is a view showing the jump configuration between partial bands at the time of periodic / aperiodic activation.
[0245] As shown in Figure 33, a structure to flexibly support partial band hop at the time of SRS transmission and configure the number of SRS symbols in the inter-hop parameter setting can be considered.
Proposal 4-6 [0246] BS configures / transmits information on the number of SRS symbols and the partial band position through RRC (dedicated) signaling and configures / transmits information on the SRS frequency resource position (for example, RIV) through DCI.
Proposal 4-7 [0247] BS can configure / transmit information about the number of SRS symbols and the partial band position through RRC (dedicated) signaling and configure information about the SRS frequency resource position using the standard inter-interval jump.
[0248] Figure 34 is a view showing an example of changing an SRS resource position at the time of periodic / aperiodic triggering (a partial band is fixed). As shown in Figure 34, a structure for prohibiting jumping between partial bands, but allowing inter-interval jumping on a partial band is also possible.
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Proposal 4-8 [0249] BS configures / transmits information on the number of SRS symbols via RRC signaling (dedicated) and configures / transmits information on and the partial band position and SRS frequency resource position ( for example, RIV) through DCI.
Proposal 4-9 [0250] BS configures / transmits information about the number of SRS symbols through RRC signaling (dedicated) and configures information about and the position of the partial band using the inter-hop pattern. BS configures / transmits information about the SRS frequency resource position (for example, RIV) via DCI.
Proposal 4-10 [0251] BS configures / transmits information on the number of SRS symbols via RRC signaling (dedicated) and configures information on and the partial band position and SRS frequency resource position (for example , RIV) using the inter-interval hop pattern.
[0252] Figure 35 is a view showing an example of changing an SRS resource position at the time of periodic / aperiodic triggering (a partial band is variable).
[0253] Figure 35 shows a configuration to allow partial band hopping between SRS intervals while the number of SRS symbols in the interval between UEs is fixed (ie the number of energy combination symbols is fixed according to a difference in signal received according to a distance between the UE and the BS).
Proposal 5 [0254] For allocating uplink resources from the full UL band or partial UL SRS band from the UEs, each having a narrow band RF, a number
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62/64 predetermined symbols (n symbols) of the configured SRS symbols are emptied to apply a return time at the time of the inter-interval jump. However, n is less than the number L 'of the configured SRS symbols. Since the value of n can be determined according to the return delay of the UEs each having a narrowband RF, the UEs each having the narrowband RF can report the delay of the return value to BS. BS can indicate to the UE how many SRS symbols are emptied at which position in all SRS symbols, based on the report.
Proposal 5-1 [0255] The BS can configure / transmit information about the position of the empty symbol in the configured SRS range through cell-specific RRC signaling.
[0256] The BS can collectively empty the specific SRS symbol without the UEs' RF capability report and the emptied symbols can be used for other uplink channels. Therefore, the symbol level jump can basically be configured to be performed on the resource SRS located at the limit of the emptied symbol.
Proposal 5-2 [0257] The BS can configure / transmit the position of the empty symbol in the configured SRS range through dedicated RRC signaling from the UE.
Proposal 5-3 [0258] BS can initiate emptying in an emptying start position within the symbol configured for the empty symbol position within the configured SRS interval and transmit the symbol index for transmission of the SRS symbol to the UE again. At this point, a ratio of ^1.1 ~ ~ ^L is satisfied.
Proposal 5-4
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63/64 [0259] The RF capacity (the RF degree of transmission covering the full or partial UL band and / or the return of the RF degree) of the UE can be reported to BS. The BS can transmit the position of empty symbols, the number of empty symbols, and the number of SRS symbols configured for the UE via RRC, MAC-CE or DCI in a specific way of the UE according to the inter-interval jump pattern when multi-SRS symbols are triggered (periodic / aperiodic / semi-persistent).
[0260] Figure 36 is a view showing an intra-interval hopping pattern considering RF return from a UE having narrowband RF capability.
[0261] (a) of Figure 36 shows the SRS BW and RF BW capacity of a specific UE and (b) of Figure 36 shows return of 1 symbol in the capacity of (a) of Figure 36.
[0262] The present invention proposes a configuration and method to allow the UEs (for example, cell-border UEs), which may not carry out the full UL bandwidth transmission due to the UE link budget limitation, to be carried out UL full band polling, while subband polling jumps at multiple symbols or multiple intervals if UL full band polling is required at the time of SRS NR transmission. Such SRS hop configuration and method can be used not only for allocating uplink resources, but also for managing uplink beams. The present invention proposes a method of configuring SRS hopping considering RF return in order to support hopping of NR UEs having narrowband RF capability.
[0263] The aforementioned modalities are achieved by combining features and structural elements of the present invention in a predetermined manner. Each of the features and structural elements must be considered selectively, unless specified separately. Each of the structural features or elements can be realized without being combined with other structural features or elements. In addition, some features and / or structural elements may
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64/64 be combined with one another to form the embodiments of the present invention. The order of operations described in the present invention can be changed. Some features or structural elements of one modality can be included in another modality, or they can be replaced with corresponding features or structural elements of another modality. In addition, it will be apparent that some claims relating to specific claims may be combined with claims relating to claims other than the specific claims to constitute the modality or add new claims by means of changes after filing the application.
[0264] Those skilled in the art will appreciate that the present invention can be realized in other specific ways than those presented here without departing from the spirit and essential characteristics of the present invention. The above exemplary modalities must therefore be interpreted in all respects as illustrative and not restrictive. The scope of the invention must be determined by the attached claims and their legal equivalents, not by the description above, and any changes that arise within the meaning and equivalence range of the attached claims must be covered by this.
INDUSTRIAL APPLICABILITY [0265] A method of transmitting an SRS and an UE for this purpose are industrially applicable to various wireless communication systems, such as an LTE / LTE-A 3GPP system, a 5G communication system etc.

权利要求:
Claims (18)
[1]
1. Method of transmitting a survey reference signal (SRS) by user equipment (UE), FEATURED by the fact that it comprises:
receive (i) first information related to a number of L symbols that are consecutive in time and that are configured for SRS transmission, and (ii) second information related to a symbol level repetition factor R for SRS transmission, where L = 2 * R and R is greater than or equal to 2; and transmitting the SRS within a range based on the first information and the second information, using a first frequency resource and a second frequency resource, where first consecutive symbols R, between consecutive symbols L within the interval, are used to transmit the SRS in the first frequency resource, and in which second consecutive symbols R, among the consecutive symbols L within the range, are used to transmit the SRS in a second frequency resource.
[2]
2. Method, according to claim 1, CHARACTERIZED by the fact that the first consecutive symbols R and the second consecutive symbols R do not overlap in a time domain.
[3]
3. Method, according to claim 1, CHARACTERIZED by the fact that the first frequency resource is different from the second frequency resource.
[4]
4. Method, according to claim 1, CHARACTERIZED by the fact that receiving the first information and the second information comprises:
receive the first information and the second information through a radio resource control (RRC) signaling.
[5]
5. Method, according to claim 1, CHARACTERIZED by the fact that it still comprises:
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2/5 receive parameters related to a frequency jump for the SRS transmission, in which transmit the SRS within the range using the first frequency resource and the second frequency resource is still based on the parameters related to the frequency jump.
[6]
6. Method, according to claim 5, CHARACTERIZED by the fact that the parameters related to the frequency hop comprise information related to an SRS bandwidth.
[7]
7. Method, according to claim 1, CHARACTERIZED by the fact that it still comprises:
receiving third information related to an initial symbol for the transmission of the SRS in the interval, where transmitting the SRS within the interval still comprises transmitting the SRS starting at the initial symbol within the interval.
[8]
8. Method, according to claim 1, CHARACTERIZED by the fact that L = 4 symbols, R = 2, and the range has a length of 14 symbols.
[9]
9. Method, according to claim 1, CHARACTERIZED by the fact that transmitting the SRS within the range using the first frequency resource and the second frequency resource comprises:
transmit the SRS using orthogonal frequency division (OFDM) multixation, where the first frequency resource comprises a first plurality of OFDM subcarriers, and where the second frequency resource comprises a second plurality of OFDM subcarriers that is different from first plurality of OFDM subcarriers.
Petition 870190045673, of 5/15/2019, p. 116/119
3/5
[10]
10. User equipment configured to transmit a polling reference signal (SRS), FEATURED by the fact that it comprises:
a receiver;
a transmitter;
at least one processor; and at least one computer memory operably connectable to at least one processor and storing instructions that, when executed, cause at least one processor to perform operations comprising:
control the receiver to receive (i) first information related to a number of L symbols that are consecutive in time and that are configured for SRS transmission, and (ii) second information related to a symbol level repetition factor R for the SRS transmission, where L = 2 * R and R is greater than or equal to 2; and controlling the transmitter to transmit the SRS within a range based on the first information and the second information, using a first frequency resource and a second frequency resource, where first consecutive symbols R, between consecutive symbols L within the interval, are used to transmit the SRS on the first frequency resource, and in which second consecutive symbols R, among the consecutive symbols L within the range, are used to transmit the SRS on a second frequency resource.
[11]
11. User equipment according to claim 10, CHARACTERIZED by the fact that the first consecutive symbols R and the second consecutive symbols R do not overlap in a time domain.
Petition 870190045673, of 5/15/2019, p. 117/119
4/5
[12]
12. User equipment according to claim 10, CHARACTERIZED by the fact that the first frequency resource is different from the second frequency resource.
[13]
13. User equipment, according to claim 10, CHARACTERIZED by the fact that receiving the first information and the second information comprises:
receive the first information and the second information through a radio resource control (RRC) signaling.
[14]
14. User equipment, according to claim 10, CHARACTERIZED by the fact that the operations still comprise:
controlling the receiver to receive parameters related to frequency hopping for SRS transmission, and controlling the transmitter to transmit SRS within the range using the first frequency resource and the second frequency resource is still based on parameters related to frequency hopping frequency.
[15]
15. User equipment according to claim 14, CHARACTERIZED by the fact that the parameters related to the frequency hop comprise information related to an SRS bandwidth.
[16]
16. User equipment, according to claim 10, CHARACTERIZED by the fact that the operations still comprise:
receiving third information related to an initial symbol for SRS transmission in the interval, and where transmitting the SRS within the interval still comprises transmitting the SRS starting at the initial symbol within the interval.
[17]
17. User equipment according to claim 10, CHARACTERIZED by the fact that L = 4 symbols, R = 2, and the range has a length of 14 symbols.
Petition 870190045673, of 5/15/2019, p. 118/119
5/5
[18]
18. User equipment according to claim 10, CHARACTERIZED by the fact that transmitting the SRS within the range using the first frequency resource and the second frequency resource comprises:
transmit the SRS using orthogonal frequency division (OFDM) multixation, where the first frequency resource comprises a first plurality of OFDM subcarriers, and where the second frequency resource comprises a second plurality of OFDM subcarriers that is different from first plurality of OFDM subcarriers.

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

优先权:

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申请号 | 申请日 | 专利标题

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US201762490614P| true| 2017-04-27|2017-04-27|

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PCT/KR2018/004946|WO2018199696A1|2017-04-27|2018-04-27|Method for transmitting srs and terminal therefor|

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