巴西专利BR112019014657A2 return information transmission method and apparatus

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专利摘要:
the embodiments of the present invention disclose a method and apparatus for transmitting feedback. the method of transmitting return information includes: receiving, by a first terminal, the first data sent by a second terminal; and sending, through the first terminal, return information for the first data to the second terminal in a first subframe, where there are second data to be sent by the first terminal in the first subframe. the return information can be carried in sci side link control information of the second data, or the return information can be carried in a data packet carrying the second data. according to the modalities of the present invention, the return information is carried in the sci or in the data package carrying the second data, so that a papr of a system can be reduced.
公开号:BR112019014657A2
申请号:R112019014657
申请日:2018-01-10
公开日:2020-05-26
发明作者:Zhao Zhenshan
申请人:Huawei Tech Co Ltd；
IPC主号:

专利说明:

METHOD AND APPARATUS FOR RETURN INFORMATION TRANSMISSION [001] This application claims priority for Chinese Patent Application No. 201710041111.0, filed at the Chinese Patent Office on January 17, 2017 and entitled FEEDBACK INFORMATION TRANSMISSION METHOD AND APPARATUS, which is here incorporated by reference in its entirety.
TECHNICAL FIELD [002] The present invention relates to the field of communication technologies and, in particular, to a method and apparatus for transmitting return information.
FUNDAMENTALS [003] Device-to-device communication (Device-to-Device, D2D) is a technology that supports mobile devices when performing direct data communication using dedicated air interface technology. The biggest difference with conventional cellular communications technology is that device-to-device communication can be performed directly without the need for routing through a base station. The base station can perform resource configuration, scheduling, coordination and the like to assist the terminals in direct communication.
[004] D2D technology is discussed in 3GPP. In long term evolution (Long Term Evolution, LTE) Version 12, data is transmitted by diffusion in D2D technology and D2D technology includes two resources: discovery (discovery) and communication (communication). The discovery means that a terminal periodically disseminates information, so that a terminal around the terminal can detect the information and discover the user. Communication means that
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2/40 direct data transmission is performed between two terminals, and a scheduling assignment mechanism (Scheduling Assignment, SA) + data (Data) is used, as shown in Figure 1.
[005] The SA is status information used to indicate data sent from a transmission end. The SA carries side link control information (Sidelink control information, SCI). The SCI includes time-frequency resource information from the data, a modulation and coding scheme (MCS) and the like. A receiving end can receive the data based on an indication from the SCI.
[006] A communication mode (communication) of a D2D system is divided into two working modes. Mode 1 is shown in (a) in Figure 1, and Mode 2 shown in (b) in Figure 1. In Mode 1, a base station allocates a given time-frequency resource in a resource pool for each D2D terminal for D2D transmission from the terminal. In Mode 2, a terminal randomly selects an SA resource from a cluster of SA resources and randomly selects a data resource from a cluster of data resources for D2D transmission. A receiving terminal blindly detects the SA in the SA resource pool and then detects data in a corresponding resource in the data resource pool using the time-frequency resource information indicated in the SA.
[007] When one terminal sends data to another terminal in a subframe n in D2D communication mode, the other terminal needs to send a return message in a subframe n + k. If the other terminal does not send data on
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3/40 η + k subframe, the return message is sent separately on a return channel resource. If the other terminal sends data in the subframe n + k at the same time, there is a scenario in which the return information is sent in a return channel resource in the subframe, and the data is sent in a data channel resource in the same subframe. The other terminal sends the return information and data information in different frequency domain resources of the same subframe. This increases the peak-to-average power ratio (PAPR) of a system and, consequently, an effective transmission power of the system is reduced and the transmission distance is shortened.
SUMMARY [008] The modalities of the present invention provide a method of transmitting feedback information, where feedback information is carried in SCI or a data packet carrying second data, so that a system's PAPR can be reduced.
[009] According to a first aspect, an embodiment of the present invention provides a method of transmitting feedback information, including: receiving, by a first terminal, first data sent by a second terminal; and sending, through the first terminal, return information for the first data to the second terminal in a first subframe, where there are second data to be sent by the first terminal in the first subframe.
[0010] The return information can be carried in SCI side link control information of the second data, or the return information can be carried in a data packet carrying the second data.
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4/40 [0011] In a possible project, when receiving the first data sent by the second terminal, the first terminal can receive, in a second subframe, the first data sent by the second terminal. There is a predefined number of subframes between the first subframe and the second subframe. For example, if an identifier for the second subframe is n, an identifier for the first subframe is n + k, where n is an integer greater than or equal to 0, and k is a natural number greater than or equal to 1. The predefined quantity can be configured by a base station or can be pre-configured.
[0012] In a possible project, if the return information is carried in the data packet carrying the second data, the data packet still carries identification information from the first terminal and / or identification information from the second terminal.
[0013] In a possible project, if the return information is carried in the data packet carrying the second data, the quantity indication information of the return information is carried in the SCI side link control information of the second data, and the quantity indication information is used to indicate a quantity of return information carried in the data package.
[0014] According to a second aspect, an embodiment of the present invention provides a method of transmitting feedback information, including: sending, through a first terminal, data to at least two second terminals; and receive, through the first terminal, return information that is for the data and that is sent by each of the
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5/40 at least two terminal seconds, where the time-frequency resources occupied by feedback information that is for the data and that is sent by all the second terminals are different.
[0015] In a possible project, an identifier of a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using identification information from the first terminal and / or identification information from the second terminal; or a time-frequency resource occupied by the feedback information that is for the data and that is sent by the second terminal is indicated by the first terminal; or a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the set of return resources includes at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
[0016] In accordance with a third aspect, an embodiment of the present invention provides a method of transmitting feedback information, including: sending destination data to a second terminal via a first terminal; detecting, by the first terminal in a predefined return channel resource, if there is return information sent by the second terminal; and retransmitting destination data through the first terminal if the first terminal does not detect any feedback sent by the second terminal.
[0017] In a possible project, the channel resource
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6/40 predefined return is determined using identification information from the first terminal and / or identification information from the second terminal; or the predefined return channel resource includes a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted home location of the return information and the second subframe is a predicted final location of the return information.
[0018] According to a fourth aspect, an embodiment of the present invention provides a method of transmitting feedback information, including: receiving, by a first terminal, first data sent by a second terminal; and send, through the first terminal, return information for the first data to the second terminal in a return channel resource in a first subframe, where the first terminal does not send second data in the first subframe, and the second data is given to be sent by the first terminal in the first subframe.
[0019] According to a fifth aspect, an embodiment of the present invention provides a return information transmission apparatus, applied to a first terminal, where the return information transmission apparatus includes a receiving unit and a sending unit , the receiving unit is configured to receive the first data sent by a second terminal, and the sending unit is configured to send feedback information for the first data to the second terminal in a first subframe, where there are second data to be sent through the first terminal in the first subframe.
[0020] The return information is carried in SCI
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7/40 of the second data; or the return information is carried in a data packet carrying the second data.
[0021] In accordance with a sixth aspect, an embodiment of the present invention provides a return information transmission apparatus, applied to a first terminal, where the return information transmission apparatus includes a sending unit and a receiving unit , the sending unit is configured to send data to at least two terminal seconds, and the receiving unit is configured to receive feedback that is sent to the data and which is sent by each of the at least two second terminals, where the time-frequency resources occupied by feedback information that is for the data and is sent by all the second terminals are different.
[0022] According to a seventh aspect, an embodiment of the present invention provides a return information transmission apparatus, applied to a first terminal, where the return information transmission apparatus includes a sending unit, a detection unit and a retransmission unit, the sending unit is configured to send destination data to a second terminal, the detection unit is configured to detect, in a predefined return channel resource, if there is return information sent by the second terminal, and the retransmission unit is configured to retransmit the destination data if no return information sent by the second terminal is detected.
[0023] In accordance with an eighth aspect, an embodiment of the present invention provides a return information transmission apparatus, applied to a first
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8/40 terminal, where the return information transmission apparatus includes a receiving unit and a sending unit, the receiving unit is configured to receive the first data sent by a second terminal, and the sending unit is configured to send feedback information for the first data to the second terminal on a return channel resource in a first subframe, where the first terminal does not send secondary data in the first subframe and the second data is data to be sent by the first terminal in the first subframe .
[0024] By implementing the modalities of the present invention, the first terminal receives the first data sent by the second terminal, and the first terminal sends, in the first subframe, the return information for the first data to the second terminal. There are the second data to be sent by the first terminal in the first subframe. The return information can be carried in the SCI of the second data, or the return information can be carried in the data packet carrying the second data. The return information is carried in the SCI or in the data packet carrying the second data, and the return information is not transmitted using an additional frequency domain feature, so that a system's PAPR can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS [0025] To more clearly describe the technical solutions in the modalities of the present invention, the following briefly describes the accompanying drawings necessary for the modalities.
[0026] Figure 1 shows a transmission mechanism
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9/40 D2D communication in the prior art;
Figure 2 is a schematic diagram of D2D communication according to an embodiment of the present invention;
Figure 3 is a schematic diagram of a grouping of D2D resources according to an embodiment of the present invention;
Figure 4 is an interaction flow chart of a method of transmitting feedback information according to an embodiment of the present invention;
Figure 5 is an interaction flow chart of another method of transmitting feedback information according to an embodiment of the present invention;
Figure 6 is a schematic diagram of a D2D communication scenario according to an embodiment of the present invention;
Figure 7 is an interaction flow chart of yet another method of transmitting feedback information according to an embodiment of the present invention;
Figure 8 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention;
Figure 9a is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention;
Figure 9b is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention;
Figure 10a is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention;
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Figure 10b is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention;
Figure 11a is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention; and
Figure 11b is a schematic structural diagram of a return information transmission apparatus according to an embodiment of the present invention.
DESCRIPTION OF THE MODALITIES [0027] The following describes the modalities of the present invention with reference to the accompanying drawings in the modalities of the present invention.
[0028] Figure 2 is a schematic architectural diagram of a D2D communications system according to an embodiment of the present invention. The D2D communications system includes a base station and a terminal. The base station is configured to allocate a time-frequency resource to the terminal, and the terminal performs D2D communication using the time-frequency resource allocated by the base station. D2D is a technology used for direct end-to-end communication, and a major difference from conventional cellular communications technology is that device-to-device communication can be performed directly without the need for routing through a base station. The base station can perform resource configuration, scheduling, coordination and the like to assist the terminals in direct communication.
[0029] D2D technology is discussed in 3GPP. In LTE
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11/40
Version 12, data is transmitted by diffusion in D2D technology, and D2D technology includes two features: discovery (discovery) and communication (communication). The discovery means that a terminal periodically transmits information, so that a user around the terminal can detect the information and discover the user. Communication means that direct data transmission is carried out between two terminals, and a scheduling assignment mechanism (SA) + data (Data) is used, as shown in Figure 1.
[0030] The SA is scheduling assignment information, which is status information used to indicate data sent from a D2D transmission terminal. The SA carries side link control information (SCI: Sidelink control information). The SCI includes time-frequency resource information from the data, modulation and coding scheme (Modulation and Coding Scheme, MCS) and the like. A receiving end can receive service data based on an SCI indication.
[0031] The data is data, and it is the service data sent by the D2D transmission terminal in a format indicated by SCI and in a location for the frequency frequency resource indicated by SCI.
[0032] If the D2D terminal is in a cell coverage area, a grouping of transmission resources will be allocated to the D2D terminal in a configuration way by a base station or in a preconfiguration way for data transmission from the D2D terminal. The resource grouping is a grouping of resources from
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12/40 transmission, and is a time-frequency resource information configured by the base station or is pre-configured for D2D transmission. As shown in Figure 3, the base station can configure different resource pools, such as a discovery resource pool, an SA resource pool, and a data resource pool. A transmission resource used for the data is indicated by SCI at SA. The terminal transmits a signal or listens for a signal in a corresponding resource pool based on the resource pool information disseminated by the base station or based on pre-configured resource pool information, to implement D2D transmission.
[0033] The D2D system has two ways of functioning: discovery (discovery) and communication (communication). A communication part is divided into two working modes. Mode 1 is shown in (a) in Figure 1, and Mode 2 shown in (b) in Figure 1. In Mode 1, a base station allocates a given time-frequency resource in a resource pool for each D2D terminal for D2D transmission from the D2D terminal. In Mode 2, a D2D terminal randomly selects an SA resource from a cluster of SA resources and randomly selects a data resource from a cluster of data resources for D2D transmission. A D2D receiving terminal blindly detects SA in the SA resource pool, and then detects data in a corresponding time-frequency resource using SCI-indicated data frequency resource information in the SA.
[0034] A method of transmitting information from
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13/40 return in the modalities of the present invention can be applied to the D2D communications system, and both a first terminal and a second terminal in the modalities of the present invention are D2D terminals.
[0035] In an optional application scenario, the return information in the modalities of the present invention can be applied to a vehicle Internet system. For example, vehicles travel in line, several vehicles form a fleet, and a first vehicle acts as head of the fleet, and controls the entire fleet, for example, controls the speed of the entire fleet, controls the distance between vehicles, controls whether another vehicle can join, and controls a vehicle in the fleet to leave the fleet. Therefore, the vehicle in front of the fleet needs to perform unicast communication with another vehicle in the fleet, and other vehicles in the fleet can also perform unicast communication. To ensure the reliability of the unicast communication transmission, a receiving end needs to send feedback information. The vehicle in front of the fleet can alternatively send a message to another vehicle in the fleet via transmission or multicast, and each vehicle sends return information to the vehicle in front of the fleet.
[0036] When the vehicle in front of the fleet sends a message to vehicle A in the fleet in a subframe η, vehicle A sends a return message in a subframe n + k. If vehicle A does not send data in subframe n + k, the return message is sent separately in a return resource in subframe n + k. If terminal A sends data in the n + k subframe at the same time, there is a scenario in which the return message is sent on a return resource in the
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14/40 subframe and a data message is sent on a data resource in the same subframe. The vehicle sends the return information and data information in different frequency domain resources of the same subframe. This increases the peak-to-average power ratio (PAPR) of the system and, consequently, an effective transmission power of the system is reduced and the transmission distance is shortened.
[0037] The method of transmitting feedback information provided in a first aspect of the modalities of the present invention is mainly used to solve a problem about how to perform multiplexed transmission when feedback information and data information are sent in the same subframe , in order to reduce a system's PAPR.
[0038] Figure 4 is a flow chart of a method of transmitting feedback information according to an embodiment of the present invention. As shown in the figure, the method of transmitting feedback information includes, but is not limited to, the following steps.
[0039] Step S10: A second terminal sends the first data to a first terminal.
[0040] In one embodiment, the first terminal and the second terminal may include, but are not limited to, a vehicle, a portable device or the like. The first terminal and the second terminal can communicate with a base station, or the first terminal and the second terminal can communicate directly with another terminal. Of course, the first terminal and the second terminal can also communicate directly with each other.
[0041] For example, that the second terminal can
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15/40 send the first data to the first terminal via unicast or broadcast communication, and the second terminal can send the first data to the first terminal in a second subframe, for example, a subframe η. Figure 8 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention. A horizontal coordinate represents the time domain and a vertical coordinate represents the frequency domain. As shown in the figure, the second terminal sends the first data in the second subframe. In the time-frequency resource diagram shown in Figure 8, an SA frequency domain resource in the second subframe carries SA from the second terminal, and a data frequency domain resource in the second subframe carries the first data from the second terminal.
[0042] Passo Sll: The first terminal receives the first data sent by the second terminal.
[0043] Step S12: The first terminal sends feedback information for the first data to the second terminal in a first subframe, where there are second data to be sent by the first terminal in the first subframe.
[0044] The return information is carried in SCI side link control information of the second data; or the return information is carried in a data packet carrying the second data.
[0045] In one mode, after receiving the first data sent by the second terminal, the first terminal needs to send the return information of the first data to the second terminal. Optionally, the return information can be a character of recognition
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16/40 (Acknowledgement, ACK) or a negative recognition character (Negative Acknowledgement, NACK).
[0046] The first terminal sends the return information for the first data to the second terminal in the first subframe. There is a predefined number of subframes between the first subframe and the second subframe, and the predefined amount can be configured by the base station or can be pre-configured. For example, if the first terminal receives, in subframe n, the first data sent by the second terminal, the first terminal needs to send the return information to the second terminal in a subframe n + k, where k is a natural number greater than or equal to 1.
[0047] As shown in Figure 8, the first terminal needs to send the return information for the first data to the second terminal in the first subframe. Specifically, optionally, the first terminal selects a frequency domain resource from a grouping of feedback resources in the first subframe, to send feedback information to the second terminal. In addition, there are the second data to be sent by the first terminal in the first subframe. As shown in Figure 8, there is the second data to be sent by the first terminal on a data frequency domain resource in the first subframe, and SA of the second data to be sent exists on an SA frequency domain resource in the first subframe. . The SA carries SCI, and the SCI is used to indicate a time-frequency resource, a sending format, and the like of the second data.
[0048] If the return information and data information are sent in different domain resources of the
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17/40 frequency in the same subframe, a peak-to-average power ratio (PAPR) of a system increases and, consequently, an effective transmission power of the system is reduced, and a transmission distance is shortened. To reduce PAPR, this embodiment of the present invention provides the following ways of multiplexing:
the return information is carried in the SCI side link control information of the second data; or the return information is carried in the data packet carrying the second data.
[0049] In the two optional multiplexing modes above, a high PAPR caused when an additional resource is used to transmit feedback information can be avoided.
[0050] Optionally, the first terminal adds the return information to the SCI, and the SCI can still carry identification information such as the ID information of the second terminal. A purpose of carrying the ID information of the second terminal is: when two terminals send data to the first terminal in subframe n at the same time, to identify a specific terminal to which the return information is sent.
[0051] Optionally, the first terminal adds identification information of the first terminal, for example, ID information of the first terminal, to the SCI. One purpose of carrying the ID information of the first terminal is as follows: When the second terminal sends data to a plurality of terminals in subframe n, the ID information added by the first terminal to the SCI is used to identify a specific terminal by sending
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18/40 the return information and data information.
[0052] Optionally, if the return information is carried in the data packet carrying the second data, the data packet still carries the identification information of the first terminal and / or the identification information of the second terminal.
[0053] Likewise, if the second terminal sends the first data to the first terminal via unidiffusion, when the first terminal sends the return information for the first data to the second terminal, the return information can be carried in the packet data of the second data, and the data packet further carries the identification information of the first terminal and / or the identification information of the second terminal.
[0054] Correspondingly, if a plurality of second terminals send the first data to the first terminal, the first terminal needs to send feedback information to each second terminal. The return information for the plurality of second terminals is encapsulated in the data packet of the second data. For example, there is a lot of feedback that needs to be sent. For each piece of feedback information, the ID information of a corresponding second terminal needs to be carried, so that the second terminals determine which data is received correctly and which data is not received correctly.
[0055] Optionally, if the return information is carried in the data packet carrying the second data, quantity indication information of the
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19/40 return is carried in the SCI of the second data, and the quantity indication information is used to indicate a quantity of return information carried in the data packet.
[0056] Specifically, if a plurality of second terminals send the first data to the first terminal, the first terminal needs to send feedback information to each second terminal. The first terminal adds the quantity indication information (N bits) to the SCI, and the quantity indication information is used to indicate the quantity of return information, that is, an amount of ACK / NACK information, included in the package. data from the second data.
[0057] Optionally, a second terminal sends the first data to a first terminal, and the first terminal needs to send return information for the first data to the second terminal. For example, the first terminal receives the first data sent by the second terminal in subframe n, and the first terminal sends the feedback information in subframe n + k. When the first terminal needs to send second data in the n + k subframe at the same time, because the return information has a higher transmission priority, a viable way is for the first terminal to send only the return information on a domain resource. return frequency in the first subframe, but do not send any second data.
[0058] By implementing this modality of the present invention, the first terminal receives the first data sent by the second terminal, and the first terminal sends, in the first subframe, the return information to
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20/40 the first data for the second terminal. There are the second data to be sent by the first terminal in the first subframe. The return information can be carried in the SCI side link control information of the second data, or the return information can be carried in the data packet carrying the second data. The return information is carried in the SCI or in the data packet carrying the second data, and the return information is not transmitted using an additional frequency domain resource, so that the PAPR of the system can be reduced.
[005 9] Figure 5 is a flow chart of a method of transmitting feedback information according to an embodiment of the present invention. As shown in the figure, the method of transmitting feedback information includes, but is not limited to, the following steps.
[0060] S20. A first terminal sends data to at least two second terminals.
[0061] In one embodiment, the first terminal sends data to at least two second terminals via broadcast or multicast, and the distances from at least two second terminals to the first terminal are different. When all the second terminals send feedback information to the first terminal in the same time-frequency resource, an almost distant effect is caused. To be specific, an information return power from a second terminal farthest from the first terminal is much less than that of a second terminal closer to the first terminal. Therefore, the return information from the second most distant terminal is drowned out, and
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21/40 very difficult to be detected correctly.
[0062] An optional application scenario is the transmission of feedback information on a vehicle Internet system. As shown in Figure 6, when a vehicle in front of a fleet sends data to a vehicle in the fleet via broadcast or multicast, all vehicles in the fleet must send return information to the vehicle in front of the fleet. If a return feature for the return information is in a one-to-one correspondence with a send feature for sending data, a plurality of vehicles will make a return using the same return feature and, consequently, a collision will occur. transmission of return information, and performance is reduced.
[0063] In addition, if the same time-frequency feature is used to return information from a plurality of vehicles, but orthogonal transmission is carried out in a way of code division, because the distances from the vehicles in the fleet to the vehicle in front of the fleet are different, different vehicles send feedback information to the vehicle in front of the fleet using different powers, and consequently, an almost distant effect is caused. To be specific, an information retrieval power of a vehicle further away from the vehicle in front of the fleet is much less than that of a vehicle closer to the vehicle in front of the fleet. Therefore, the return information from the most distant vehicle is drowned out, and it is very difficult to be detected correctly.
[0064] This modality of the present invention provides an improvement solution to the previous problem: The first terminal sends the data for at least two seconds
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22/40 terminals through broadcast or multicast.
[0065] S21. The second terminals send feedback information to the data at the first terminal.
[0066] In one mode, after receiving the data sent by the first terminal, each second terminal needs to send feedback information for the data received to the first terminal. To avoid an almost distant effect, the time-frequency resources used by all the second terminals to send the feedback information are different. Specifically, optionally, when determining a time-frequency resource used for the feedback information for the received data, the second terminal can select the following optional implementations.
[0067] Optionally, an identifier of the time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using identification information from the first terminal and / or identification information from the second terminal; or the time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is indicated by the first terminal; or the time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the set of return resources includes at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
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23/40 [0068] S22. The first terminal receives feedback information that is for the data and that is sent by each of the at least two second terminals, where the time-frequency resources occupied by the feedback information that is for the data and that is sent by all second terminals are different.
[0069] In one mode, the first terminal receives the return information which is for the received data and which is sent by each of the at least two second terminals. As the time-frequency resources occupied by the feedback information sent by all the second terminals are different, an almost distant effect can be avoided.
[0070] By implementing this embodiment of the present invention, when the first terminal sends data to the at least two second terminals by broadcast, a plurality of second terminals sends feedback information for the data to the first terminal using different data resources. time-frequency, in order to avoid an almost distant effect caused when the plurality of terminal seconds returns using the same time-frequency resource.
[0071] Figure 7 is a flow chart of a method of transmitting feedback information according to an embodiment of the present invention. As shown in the figure, the method of transmitting feedback information includes, but is not limited to, the following steps.
[0072] S30. A first terminal sends destination data to a second terminal.
[0073] In one mode, after the introduction of the unidiffusion transmission, there are two ways to
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24/40 transmission in one system: single-stream transmission and broadcast transmission. Return of a receiving end is required in the way of unicast transmission, and no return of a receiving end is necessary in the way of broadcast transmission. However, when a receiving end fails to detect data, it is very difficult for the receiving end to identify whether the data is transmitted by unicast or broadcast. Since broadcast transmission generally does not require feedback, and only unicast transmission requires feedback, a terminal cannot know if the feedback information needs to be sent. A transmission end of the unicast transmission cannot receive feedback from a receiving end.
[0074] This embodiment of the present invention provides improvements based on the previous description. The improvement is mainly for a single-broadcast transmission scenario, because when the first terminal sends the destination data through the broadcast, if the second terminal correctly receives the destination data or not, the second terminal does not need to return. In this embodiment of the present invention, the first terminal sends the destination data to the second terminal in the form of one-stream transmission.
[0075] S31. The first terminal detects, in a predefined return channel resource, if there is return information sent by the second terminal.
[0076] Optionally, the predefined return channel resource is determined using identification information from the first terminal and / or identification information from the second terminal; or
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25/40 the predefined return channel resource includes a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted initial location of the feedback information and the second subframe is an expected final location of the feedback information return.
[0077] In one embodiment, after the second terminal receives the destination data sent by the first terminal, if the detection performed by the second terminal fails, the second terminal cannot identify whether the destination data is transmitted in the form of broadcast or in the way of broadcast transmission, and therefore, the second terminal does not send feedback information.
[0078] As the first terminal sends the destination data in the form of unicast transmission, the first terminal detects, in the predefined return channel resource, if there is the return information sent by the second terminal.
[0079] Optionally, the predefined return channel resource can be determined using a UE ID of the first terminal and / or a UE ID of the second terminal.
[0080] Alternatively, the first terminal looks for feedback information in subframes [n + m, n + m + k], where n represents a moment when the first terminal transmits the destination data via unidiffusion, n + m represents a first subframe location where the feedback information can appear, and n + m + k represents a last subframe location where the feedback information can appear.
[0081] S32. The first terminal retransmits the destination data if the first terminal does not detect
Petition 870190067242, of 07/16/2019, p. 35/65
26/40 return sent by the second terminal.
[0082] In one embodiment, the first terminal retransmits the destination data if the first terminal does not detect feedback information sent by the second terminal. Through the implementation of this embodiment of the present invention, when a receiving end (namely, the second terminal) is unable to identify single or multicast, the receiving end cannot transmit feedback information. A transmission end (that is, the first terminal) can determine, by detecting whether there is feedback, whether retransmission needs to be performed.
[0083] By implementing this modality of the present invention, the first terminal sends the destination data to the second terminal via unidiffusion. If the second terminal is unable to detect the data, the second terminal will not be able to know whether the data is transmitted via unicast or broadcast. Therefore, the second terminal cannot determine whether the return information needs to be sent. In this embodiment of the present invention, the second terminal does not send feedback information as long as the second terminal cannot detect the data. The first terminal detects, in the predefined return channel resource, if there is the return information sent by the second terminal and automatically retransmits the data if no return information is detected, so that the reliability of the data transmission is improved.
[0084] The foregoing described in detail the methods in the modalities of the present invention. The following provides an apparatus in an embodiment of the present invention.
Petition 870190067242, of 07/16/2019, p. 36/65
27/40 [0085] Figure 9a and Figure 9b are schematic structural diagrams of a return information transmission apparatus according to an embodiment of the present invention. The return information transmission apparatus in this embodiment of the present invention can be applied to the first terminal in the embodiment of Figure 4, and the first terminal can be any D2D terminal.
[0086] As shown in Figure 9a, the apparatus may include a receiving unit 101 and a sending unit 102.
[0087] The receiving unit 101 can be configured to perform a receiving action that is performed by the first terminal and which is described in the method of Figure 4.
[0088] The sending unit 102 can be configured to perform a sending action that is performed by the first terminal and which is described in the method of Figure 4.
[008 9] Receiving unit 101 and sending unit 102 can be implemented using a transceiver 1001 in Figure 9b.
[0090] For specific details, see the description in the previous method. Details are not described here.
[0091] For example, the receiving unit 101 is configured to receive the first data sent by a second terminal.
[0092] The sending unit 102 is configured to send feedback information for the first data to the second terminal in a first subframe, where there are second data to be sent by the first terminal in the first subframe.
Petition 870190067242, of 07/16/2019, p. 37/65
28/40 [0093] The return information is carried in SCI of the second data; or the return information is carried in a data packet carrying the second data.
[0094] Optionally, the receiving unit is specifically configured to receive, in a second subframe, the first data sent by the second terminal, where there is a pre-configured number of subframes between the first subframe and the second subframe, and the pre-quantity -configured is configured by a base station or is pre-configured.
[0095] Optionally, if the return information is carried in the data packet carrying the second data, the data packet still carries identification information from the first terminal and / or identification information from the second terminal.
[0096] Optionally, if the return information is carried in the data packet carrying the second data, quantity indication information of the return information is carried in the SCI of the second data, and the quantity indication information is used to indicate a amount of return information carried in the data packet.
[0097] Correspondingly, as shown in Figure 9b, the device can include transceiver 1001 and a processor 1002. Processor 1002 is configured to control an operation of the device, including: performing mapping of time-frequency resources (including receiving and / or send) in the return information using transceiver 1001. In addition, the device may include a
Petition 870190067242, of 07/16/2019, p. 38/65
29/40 memory 1003. Memory 1003 can include a read-only memory and a random access memory, and is configured to provide instruction and data for processor 1002. Memory 1003 can be integrated with processor 1002, or it can be independent of processor 1002. A portion of memory 1003 may further include non-volatile random access memory (NVRAM). The device components are coupled together using a bus system. In addition to a data bus, the 1009 bus system also includes a power bus, a control bus and a status signal bus. However, for clarity of description, several buses are marked as the 1009 bus system in the figure.
[0098] The procedure disclosed on a first terminal side in Figure 4 in the modalities of this request can be applied to transceiver 1001 and processor 1002. In an implementation process, steps of the device implementation process can be implemented using a logic circuit integrated into the hardware on the 1002 processor or using instructions in the form of software. Processor 1002 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, an array of programmable field gates or other programmable logic device, a transistor logic device or discrete gate, or a component of discrete hardware, and can implement or execute the methods, steps and diagrams of logic blocks disclosed in the modalities of this application. The general purpose processor can be a microprocessor or any conventional or similar processor. The steps of the method
Petition 870190067242, of 07/16/2019, p. 39/65
30/40 disclosed with reference to the modalities of this application can be performed directly by a hardware processor, or can be performed using a combination of hardware on the processor and a software module. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory or a register. The storage medium is located in memory 1003, and processor 1002 reads information in memory 1003 and completes steps in procedures in the modalities of the present invention in combination with processor hardware 1002.
[0099] Optionally, transceiver 1001 is configured to receive the first data sent by a second terminal.
[00100] Transceiver 1001 is further configured to send feedback information for the first data to the second terminal in a first subframe, where there are second data to be sent by the first terminal in the first subframe.
[00101] The return information is carried in SCI of the second data; or the return information is carried in a data packet carrying the second data.
[00102] Optionally, transceiver 1001 is further configured to receive, in a second subframe, the first data sent by the second terminal, where there is a pre-configured number of subframes between the first subframe and the second subframe, and the preconfigured quantity is configured by a base station or is pre
Petition 870190067242, of 07/16/2019, p. 40/65
31/40 configured.
[00103] Optionally, if the return information is carried in the data packet carrying the second data, the data packet still carries identification information from the first terminal and / or identification information from the second terminal.
[00104] Optionally, if the return information is carried in the data package carrying the second data, quantity indication information of the return information is carried in the SCI of the second data, and the quantity indication information is used to indicate a amount of return information carried in the data packet.
[00105] When the apparatus is user equipment, the apparatus may further include a structure, for example, an input device such as a keyboard or an output device such as a display.
[00106] Figure 10a and Figure 10b are schematic structural diagrams of a return information transmission apparatus according to an embodiment of the present invention. The return information transmission apparatus in this embodiment of the present invention can be applied to the first terminal in the embodiment of Figure 5, and the first terminal can be any D2D terminal. The first terminal sends data to at least two second terminals per transmission, and the second terminal can also be a D2D terminal.
[00107] As shown in Figure 10a, the apparatus may include a sending unit 201 and a receiving unit
Petition 870190067242, of 07/16/2019, p. 41/65
32/40
202.
[00108] The sending unit 201 can be configured to perform a sending action that is performed by the first terminal and which is described in the method of Figure 5.
[00109] The receiving unit 202 can be configured to perform a sending action that is performed by the first terminal and that is described in the method of Figure 5.
[00110] The sending unit 201 and the receiving unit 202 can be implemented using a 2001 transceiver in Figure 10b.
[00111] For specific details, see the description in the previous method. Details are not described here.
[00112] For example, the sending unit 201 is configured to send data to at least two terminal seconds.
[00113] The receiving unit 202 is configured to receive feedback information that is for the data and that is sent by each of the at least two second terminals, where the time-frequency resources occupied by feedback information that is for the data and that is sent by all the second terminals are different.
[00114] Optionally, an identifier of a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using identification information from the first terminal and / or identification information from the second terminal; or a time-frequency resource occupied by the feedback information that is for the data and that is sent by the second
Petition 870190067242, of 07/16/2019, p. 42/65
33/40 terminal is indicated by the first terminal; or a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the set of return resources includes at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
[00115] Correspondingly, as shown in Figure 10b, the device may include the 2001 transceiver and a 2002 processor. The 2002 processor is configured to control the operations of the device, including: sending data to the second terminal using the 2001 transceiver and receiving the return information that is for the data and that is sent by the second terminal. In addition, the equipment may include a 2003 memory. The 2003 memory may include a read-only memory and a random access memory, and is configured to provide instruction and data for the 2002 processor. The 2003 memory may be integrated with the processor 2002, or it can be independent of the 2002 processor. A part of the 2003 memory can also include non-volatile random access memory (NVRAM). The device components are coupled together using a bus system. In addition to a data bus, the 2009 bus system also includes a power bus, a control bus and a status signal bus. However, for clarity of description, several buses are marked as the 2009 bus system in the figure.
[00116] The procedure disclosed in the first side
Petition 870190067242, of 07/16/2019, p. 43/65
34/40 terminal in Figure 5 in the modalities of this request can be applied to the transceiver 2001 and the processor 2002. In an implementation process, steps of the device implementation process can be implemented using a logic integrated circuit to the hardware in the processor 2002, or using instructions in the form of software. The 2002 processor can be a general purpose processor, a digital signal processor, an application specific integrated circuit, an array of programmable field gates or other programmable logic device, a transistor logic device or discrete gate, or a component of discrete hardware, and can implement or execute the methods, steps and diagrams of logic blocks disclosed in the modalities of this application. The general purpose processor can be a microprocessor or any conventional or similar processor. The steps of the method disclosed with reference to the modalities of this application can be performed directly by a hardware processor, or can be performed using a combination of hardware in the processor and a software module. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory or a register. The storage medium is located in the 2003 memory, and the 2002 processor reads information from the 2003 memory and completes the steps in the procedures in the modalities of the present invention in combination with the 2002 processor hardware.
[00117] Optionally, the 2001 transceiver is
Petition 870190067242, of 07/16/2019, p. 44/65
35/40 configured to send data to at least two terminal seconds.
[00118] Transceiver 1001 is further configured to receive feedback information that is for the data and that is sent by each of the at least two second terminals, where the time-frequency resources occupied by feedback information that is for the data and that is sent through all the second terminals are different.
[00119] Optionally, an identifier of a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using identification information from the first terminal and / or identification information from the second terminal; or a time-frequency resource occupied by the feedback information that is for the data and that is sent by the second terminal is indicated by the first terminal; or a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the set of return resources includes at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
[00120] When the apparatus is user equipment, the apparatus may further include a structure, for example, an input device such as a keyboard or an output device such as a display.
[00121] Figure 11a and Figure 11b are schematic structural diagrams of a transmission transmission device
Petition 870190067242, of 07/16/2019, p. 45/65
36/40 feedback information according to an embodiment of the present invention. The return information transmission apparatus in this embodiment of the present invention can be applied to the first terminal in the embodiment of Figure 7, and the first terminal can be any D2D terminal. The first terminal sends data to a second terminal and the second terminal can also be a D2D terminal.
[00122] As shown in Figure 11a, the apparatus may include a sending unit 301, a detection unit 302 and a relay unit 303.
[00123] The sending unit 301 can be configured to perform a sending action that is performed by the first terminal and which is described in the method of Figure 7.
[00124] The detection unit 302 can be configured to perform a detection action that is performed by the first terminal and which is described in the method of Figure 7.
[00125] The relay unit 303 can be configured to perform a relay action that is performed by the first terminal and which is described in the method of Figure 7.
[00126] THE unity shipping 301 and the unity in retransmission 33001 transceiver 03 canin the figure to be11b. implemented using one [00127] THE unity in detection 302 can to be
implemented using a 3002 transceiver in Figure 11b.
[00128] For specific details, see the description in the previous method. Details are not described here.
[00129] For example, sending unit 301 is configured to send destination data for one second
Petition 870190067242, of 07/16/2019, p. 46/65
37/40 terminal.
[00130] The detection unit 302 is configured to detect, in a predefined return channel resource, if there is return information sent by the second terminal.
[00131] The relay unit 303 is configured to relay the destination data if no return information sent by the second terminal is detected.
[00132] Optionally, the predefined return channel resource is determined using identification information from the first terminal and / or identification information from the second terminal; or the predefined return channel resource includes a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted home location of the return information and the second subframe is a predicted final location of the return information.
[00133] Correspondingly, as shown in Figure 11b, the device can include transceiver 3001 and processor 3002. Processor 3002 is configured to control the operations of the device, including: sending destination data to the second terminal using transceiver 3001 , and retransmit the destination data. In addition, the device may include memory 3003. Memory 3003 may include read-only memory and random access memory, and is configured to provide instruction and data for processor 3002. Memory 3003 can be integrated into the processor 3002 or can be processor independent 3002. A portion of memory 3003 may also include non-random access memory
Petition 870190067242, of 07/16/2019, p. 47/65
38/40 volatile (NVRAM). The device components are coupled together using a bus system. In addition to a data bus, the 3009 bus system also includes a power bus, a control bus and a status signal bus. However, for clarity of description, several buses are marked as the 3009 bus system in the figure.
[00134] The procedure disclosed on a first terminal side in Figure 7 in the modalities of this request can be applied to transceiver 3001 and processor 3002. In an implementation process, the steps of the device implementation process can be implemented using a circuit logic integrated into the hardware in the 3002 processor, or using instructions in the form of software. The processor 3002 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, an array of programmable field gates or other programmable logic device, a transistor logic device or discrete gate, or a component of discrete hardware, and can implement or execute the methods, steps and diagrams of logic blocks disclosed in the modalities of this application. The general purpose processor can be a microprocessor or any conventional or similar processor. The steps of the disclosed method with reference to the modalities of this application can be performed directly by a hardware processor, or can be performed using a combination of hardware on the processor and a software module. The software module can be located in a storage medium mature in the art, such as a random access memory, a
Petition 870190067242, of 07/16/2019, p. 48/65
39/40 flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory or a recorder. The storage medium is located in memory 3003, and processor 3002 reads information in memory 3003 and completes the steps in the procedures in the modalities of the present invention in combination with processor hardware 3002.
[00135] Optionally, transceiver 3001 is configured to send destination data to a second terminal.
[00136] Processor 3002 is configured to detect, in a predefined return channel resource, if there is return information sent by the second terminal.
[00137] Transceiver 1001 is further configured to retransmit the destination data if no return information sent by the second terminal is detected.
[00138] Optionally, the predefined return channel resource is determined using identification information from the first terminal and / or identification information from the second terminal; or the predefined return channel resource includes a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted home location of the return information, and the second subframe is a predicted final location of the return information .
[00139] When the apparatus is user equipment, the apparatus may further include a structure, for example, an input device such as a keyboard or an output device such as a display.
Petition 870190067242, of 07/16/2019, p. 49/65
40/40 [00140] A person of ordinary skill in the art can understand that all or some of the method methods in the modalities can be implemented by a computer program that instructs related hardware. The program can be stored on a computer-readable storage medium. When the program is executed, the method processes in the modalities are carried out. The previous storage medium includes: any medium that can store program code, such as a ROM, a RAM random access memory, a magnetic disk or an optical disk.

权利要求:
Claims (16)
[1]
1. Method of transmitting return information, characterized by the fact that it comprises:
receiving, by a first terminal, the first data sent by a second terminal; and sending, by the first terminal, return information for the first data to the second terminal in a first subframe, in which there are second data to be sent by the first terminal in the first subframe, in which the return information is carried in the control information side link SCI of the second data; or the return information is carried in a data packet carrying the second data.
[2]
2. Method, according to claim 1, characterized by the fact that the reception, by a first terminal, of the first data sent by a second terminal comprises:
receive, by the first terminal in a second subframe, the first data sent by the second terminal, in which there is a pre-configured number of subframes between the first subframe and the second subframe, and the pre-configured quantity is configured by a base station or is pre-configured.
[3]
3. Method, according to claim 1, characterized by the fact that if the return information is carried in the data packet carrying the second data, quantity indication information of the return information is carried in the side link control information SCI of the second data, and the quantity indication information is used to indicate a quantity of
Petition 870190067242, of 07/16/2019, p. 51/65
2/6 return information carried in the data package.
[4]
Method according to any one of claims 1 to 3, characterized in that if the return information is carried in the data packet carrying the second data, the data packet also carries identification information from the first terminal and / or identification information for the second terminal.
[5]
5. Method of transmission of return information, characterized by the fact that it comprises:
send, through a first terminal, data to at least two second terminals; and receive, by the first terminal, return information that is for the data and that is sent by each of the at least two second terminals, in which the frequency-frequency resources occupied by return information that is for the data and that is sent by all second terminals are different.
[6]
6. Method according to claim 5, characterized by the fact that an identifier of a frequency-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using identification information from the first terminal and / or identification information for the second terminal; or a time-frequency resource occupied by the feedback information that is for the data and that is sent by the second terminal is indicated by the first terminal; or a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the
Petition 870190067242, of 07/16/2019, p. 52/65
3/6 set of feedback resources comprises at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
[7]
7. Method of transmission of return information, characterized by the fact that it comprises:
send destination data to a second terminal via a first terminal;
detecting, by the first terminal in a predefined return channel resource, if there is return information sent by the second terminal; and retransmitting destination data through the first terminal if the first terminal does not detect any feedback sent by the second terminal.
[8]
8. Method according to claim 7, characterized by the fact that the predefined return channel resource is determined using identification information from the first terminal and / or identification information from the second terminal; or the predefined return channel resource comprises a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted initial location of the return information and the second subframe is a predicted final location of the return information.
[9]
9. Apparatus for transmitting return information, applied to a first terminal and characterized by the fact that it comprises:
a receiving unit, configured to receive the first data sent by a second terminal; and a sending unit, configured to send information
Petition 870190067242, of 07/16/2019, p. 53/65
4/6 return for the first data to the second terminal in a first subframe, in which there are second data to be sent by the first terminal in the first subframe, in which the return information is carried in SCI of the second data; or the return information is carried in a data packet carrying the second data.
[10]
10. Apparatus, according to claim 9, characterized by the fact that the receiving unit is specifically configured to receive, in a second subframe, the first data sent by the second terminal, in which there is a pre-configured number of subframes between the first subframe and the second subframe, and the predefined quantity is configured by a base station or is preconfigured.
[11]
11. Apparatus according to claim 9, characterized by the fact that if the return information is carried in the data packet carrying the second data, quantity indication information of the return information is carried in the SCI of the second data, and the quantity indication information is used to indicate a quantity of return information carried in the data package.
[12]
Apparatus according to any one of claims 9 to 11, characterized in that if the return information is carried in the data packet carrying the second data, the data packet still carries identification information from the first terminal and / or identification information for the second terminal.
Petition 870190067242, of 07/16/2019, p. 54/65
5/6
[13]
13. Apparatus for transmitting return information, applied to a first terminal and characterized by the fact that it comprises:
a sending unit, configured to send data to at least two terminal seconds; and a receiving unit, configured to receive feedback information that is for the data and that is sent by each of the at least two terminal seconds, in which the time-frequency resources occupied by feedback information that is for the data and that is sent through all the second terminals are different.
[14]
14. Apparatus according to claim 13, characterized by the fact that an identifier of a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is determined using the identification information of the first terminal and / or identification information of the second terminal; or a time-frequency resource occupied by the feedback information that is for the data and that is sent by the second terminal is indicated by the first terminal; or a time-frequency resource occupied by the return information that is for the data and that is sent by the second terminal is a time-frequency resource corresponding to the second terminal in a set of return resources, the set of return resources comprises at least two time-frequency resources, and a second terminal corresponds to a time-frequency resource.
[15]
15. Apparatus for transmitting return information, applied to a first terminal and characterized by the fact that
Petition 870190067242, of 07/16/2019, p. 55/65
6/6 comprising:
a sending unit, configured to send destination data to a second terminal;
a detection unit, configured to detect, in a predefined return channel resource, if there is return information sent by the second terminal; and a retransmission unit, configured to retransmit the destination data if no return information sent by the second terminal is detected.
[16]
16. Apparatus according to claim 15, characterized by the fact that the predefined return channel resource is determined using identification information from the first terminal and / or identification information from the second terminal; or the predefined return channel resource comprises a time-frequency resource between a first subframe and a second subframe, the first subframe is a predicted initial location of the return information and the second subframe is a predicted final location of the return information.

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法律状态:
2021-10-19| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

申请号 | 申请日 | 专利标题

CN201710041111.0A|CN108322414A|2017-01-17|2017-01-17|A kind of feedback information transmission method and device|

PCT/CN2018/072110|WO2018133720A1|2017-01-17|2018-01-10|Feedback information transmission method and apparatus|

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