WO2021088781A1

WO2021088781A1 - Information feedback method, retransmission method and terminal

Info

Publication number: WO2021088781A1
Application number: PCT/CN2020/126065
Authority: WO
Inventors: 郑石磊; 赵锐
Original assignee: 大唐移动通信设备有限公司
Priority date: 2019-11-08
Filing date: 2020-11-03
Publication date: 2021-05-14
Also published as: CN112787783B; CN112787783A

Abstract

Provided are information feedback method, a retransmission method and a terminal. The information feedback method comprises: when a plurality of time slots share the same feedback resource pool, determining the feedback states of a plurality of transmission blocks according to receiving results of the transmission blocks in the plurality of time slots; and selecting, from among feedback resource positions corresponding to transmission blocks successfully decoding control information in the plurality of time slots, a feedback resource position mapped by a feedback channel, and sending feedback state identifiers of the transmission blocks by means of the feedback channel, wherein the feedback resource position and the feedback state identifiers jointly indicate whether a sending terminal needs to perform data retransmission with respect to each of the transmission blocks.

Description

Information feedback and retransmission method and terminal

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201911089902.6 filed in China on November 8, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to an information feedback and retransmission method and terminal.

Background technique

With the further development of V2X (Vehicle to Everything, Internet of Vehicles) technology, some new application scenarios have emerged. In order to support a wider range of services and provide higher communication reliability, NR (New Radio) V2X is based on LTE (New Radio). Long Term Evolution) In addition to the original broadcast communication mode of V2X, it also introduces unicast and multicast communication modes, and introduces feedback channels for these two communication modes.

Since V2X communication is a sidelink (direct link), no base station participates in the scheduling of the feedback resource mapping process, and the resource mapping method of the NR Uu port cannot be used. The feedback information cannot be transmitted accurately and reliably.

Summary of the invention

The present disclosure provides an information feedback and retransmission method and a terminal, which solves the problem that the terminal cannot reliably feedback information in a direct link without base station scheduling.

The embodiment of the present disclosure provides an information feedback method, which is applied to a receiving terminal in a through link sidelink, and includes:

In the case that multiple time slots share the same feedback resource pool, determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots;

Selecting the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks on which the control information is successfully decoded in the multiple time slots, and sending the feedback status identifier of the transmission block through the feedback channel;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.

Optionally, the receiving terminal stores a corresponding relationship between feedback information and the feedback status of each transport block, and the feedback information includes: the feedback resource location mapped by the feedback channel and the feedback channel sent by the feedback channel. Feedback status indicator.

Optionally, the feedback status identifier indicates the feedback status of some of the multiple transmission blocks, or the feedback status identifier and the feedback resource location together indicate the overall feedback status of the multiple transmission blocks .

Optionally, the corresponding relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback of the transmission block corresponding to the feedback resource location The state is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a no feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if There is an ACK state in the feedback states of the plurality of transmission blocks, and the feedback state of the transmission block corresponding to the feedback resource position is the ACK state. If there is no ACK state in the feedback states of the plurality of transmission blocks, the The feedback state of the transmission block corresponding to the feedback resource location is the NACK state, and if a plurality of the transmission blocks are in the Discontinuous Transmission (DTX) state, the feedback information is the no feedback state;

When the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission corresponding to the feedback resource position The feedback state of the block group is the ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is the no feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier.

Optionally, the corresponding relationship includes:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transmission block corresponding to the feedback resource location is negative Confirming the NACK status, and if there is no NACK status in the feedback status of the multiple transport blocks, the feedback information is a non-feedback status;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if multiple transmissions There is a NACK state in the feedback state of the block, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is none Feedback status

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource position It is a NACK state, and if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.

Optionally, in a case where the multiple time slots are two, the feedback channel carries 1 bit of information, which is used to indicate the feedback status identifier;

In a case where the multiple time slots are 4, the feedback channel carries 2 bits of information, which is used to indicate the feedback status identifier.

Optionally, in a case where the multiple time slots are two, the feedback channel carries 2 bits of information, which is used to indicate the feedback status identifier;

In the case that the unicast mode or the second method in the multicast mode is adopted between the receiving terminal and the sending terminal, the correspondence relationship includes:

The second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the feedback state of the transmission block corresponding to the feedback resource position is ACK or NACK state, if there are multiple transmission blocks If the feedback state of is all DTX state, the feedback information is no feedback state;

Wherein, when the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the corresponding relationship includes: the feedback state of the transport block corresponding to the feedback resource location is the NACK state, and if there are multiple If there is no NACK state in the feedback state of the transport block, the feedback information is a non-feedback state;

Optionally, the feedback status of the transmission block group is determined according to the feedback status of the transmission blocks included in the transmission block group;

Wherein, in the case that at least one transmission block in the transmission block group requires the transmitting terminal to perform data retransmission, the feedback status identifier of the transmission block group indicates that the transmitting terminal needs to perform data retransmission on the transmission block group.

Optionally, the sending the feedback status identifier of the transport block through the feedback channel includes:

Sending the feedback status identifier of the transport block group through the feedback channel;

The feedback resource location corresponding to the transmission block group is the feedback resource location corresponding to any transmission block in the transmission block group.

Optionally, the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3. In this case, if all the three transmission blocks require data retransmission, the feedback state identifier is the first preset state identifier;

If none of the three transmission blocks successfully decode the control information, the feedback status identifier of the transmission block is not sent.

The embodiment of the present disclosure also provides an information retransmission method, which is applied to a sending terminal in a through link sidelink, including:

Obtain the feedback status identifier;

Determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

Optionally, the obtaining the feedback status identifier includes:

When there are multiple receiving terminals, the feedback status identifier is detected at the feedback resource positions corresponding to all receiving terminals.

Optionally, the sending terminal stores a correspondence between feedback information and the feedback status of each transport block, and the feedback information includes: the feedback resource location mapped by the feedback channel and the feedback channel sent by the feedback channel. Feedback status identification;

The determining whether to perform data retransmission for each transmission block includes:

According to the feedback status corresponding to the feedback status identifier and the feedback resource location in the corresponding relationship, it is determined whether to perform data retransmission for each transmission block.

Optionally, the corresponding relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if there are multiple There is an ACK state in the feedback state of the transport block, the feedback state of the transport block corresponding to the feedback resource position is the ACK state, and if there is no ACK state in the feedback state of the multiple transport blocks, the feedback resource The feedback state of the transmission block corresponding to the position is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

When the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission block group corresponding to the feedback resource position The feedback state of is an ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal separately obtains the feedback state identifiers fed back by each receiving terminal in an independent feedback channel.

Optionally, the corresponding relationship includes:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transport block corresponding to the feedback resource location is NACK State, if there is no NACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if the number of transmission blocks is 3 There is a NACK state in the feedback state, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is the no feedback state ；

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource location is NACK State, if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal obtains the feedback state identifier fed back by each receiving terminal on the same feedback channel.

Optionally, in a case where there are two timeslots and the feedback channel carries 2 bits of information, the correspondence relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback status of the transmission block corresponding to the feedback resource location is the ACK or NACK status. The feedback state of the block is DTX state, then the feedback information is no feedback state;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if there is no feedback state of the multiple transport blocks NACK state, the feedback information is no feedback state;

Optionally, in the case that the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, determining whether to perform data retransmission for each transmission block includes:

When the feedback status identifier sent by at least one receiving terminal indicates that the transmission block needs to be retransmitted, detecting whether to send the transmission block to the receiving terminal;

In the case that the sending terminal sends the transmission block to the receiving terminal, retransmit the transmission block data to the at least one receiving terminal;

In the case where the feedback status identifier indicates that data retransmission of the transmission block is not required, or the sending terminal does not send the transmission block to the receiving terminal, data retransmission of the transmission block is not performed.

Optionally, in the case that the multicast mode is adopted between the receiving terminal and the sending terminal, determining whether to perform data retransmission for each transmission block includes:

Among all the feedback resource locations where the feedback status identifier is obtained, there is at least one feedback status identifier sent by the receiving terminal, indicating that the transmission block data needs to be retransmitted, and the sending terminal sends the transmission block to the receiving terminal Next, retransmit the transport block data to all receiving terminals that receive the transport block.

Optionally, the step of determining whether to perform data retransmission for each of the transmission blocks includes one of the following:

In the case that the feedback status identifier is not obtained, all transmission blocks do not need to perform data retransmission;

When the first preset state identifier is obtained, data retransmission is performed on all transmission blocks.

Optionally, the method further includes:

In the case where the multiple time slots are 4, the maximum number of transmission blocks transmitted by the transmitting terminal in each cycle is set to 3.

The embodiment of the present disclosure also provides a terminal, the terminal is a receiving terminal, including: a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor executes the The computer program implements the following steps:

Optionally, the corresponding relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the transmission block corresponding to the feedback resource position The feedback state of is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if There is an ACK state in the feedback states of the plurality of transmission blocks, and the feedback state of the transmission block corresponding to the feedback resource position is the ACK state. If there is no ACK state in the feedback states of the plurality of transmission blocks, the The feedback state of the transmission block corresponding to the feedback resource location is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

Optionally, the corresponding relationship includes:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transmission block corresponding to the feedback resource location is negative Confirming the NACK status, if there is no NACK status in the feedback status of the multiple transport blocks, the feedback information is a non-feedback status;

The feedback state of the transport block corresponding to the feedback resource location is the ACK or NACK state, and if the feedback states of multiple transport blocks are all in the DTX state, the feedback information is the no feedback state;

Optionally, the processor implements the following steps when executing the computer program:

The embodiment of the present disclosure also provides a terminal, the terminal is a transmitting terminal, including: a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor executes the The computer program implements the following steps:

Obtain the feedback status identifier;

When there are multiple receiving terminals, the feedback state identifier is detected at the feedback resource positions corresponding to all receiving terminals.

When the processor executes the computer program, the following steps are implemented:

Optionally, the corresponding relationship includes:

In the case that the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission block group corresponding to the feedback resource position The feedback state of is an ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Optionally, the corresponding relationship includes:

Optionally, in the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the following steps are implemented when the processor executes the computer program:

Optionally, in the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the following steps are implemented when the processor executes the computer program:

Optionally, the processor implements one of the following steps when executing the computer program:

The embodiment of the present disclosure also provides a terminal, where the terminal is a receiving terminal and includes:

The first determining module is configured to determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots when multiple time slots share the same feedback resource pool;

The first sending module is configured to select the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks for which the control information is successfully decoded in the multiple time slots, and send the information of the transmission block through the feedback channel. Feedback status identification;

The embodiment of the present disclosure also provides a terminal, which is a sending terminal and includes:

The first obtaining module is used to obtain the feedback status identifier;

The second determining module is configured to determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

The embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned information feedback method or the steps of the above-mentioned information retransmission method are realized.

The beneficial effects of the above technical solutions of the present disclosure are:

In the embodiments of the present disclosure, the feedback resource location selected by the receiving terminal and the information bits carried in the feedback channel are used to complete the feedback status indication. The maximum feedback information can be carried without the need to increase the feedback channel, and the control information cannot be decoded at the receiving terminal. In the case of instructing the sending terminal to perform data retransmission, the problem that the terminal cannot reliably feedback information due to no base station participating in the scheduling in the direct link is solved.

Description of the drawings

Figure 1 shows a schematic diagram of multiple time slots sharing the same feedback resource pool;

FIG. 2 shows a schematic flowchart of an information feedback method according to some embodiments of the present disclosure;

Figure 3 shows a schematic diagram of a sending terminal sending two transmission blocks on two consecutive time slots;

4 shows a schematic diagram of feedback channels corresponding to two transport blocks in unicast mode in some embodiments of the present disclosure;

FIG. 5 shows a schematic diagram of feedback channels corresponding to two transmission blocks in the second mode of multicast in some embodiments of the present disclosure;

FIG. 6 shows a schematic diagram of feedback channels corresponding to two transmission blocks in the first multicast mode of some embodiments of the present disclosure;

Fig. 7 shows a schematic diagram of a sending terminal sending four transmission blocks in four consecutive time slots;

FIG. 8 shows a schematic diagram of feedback channels corresponding to four transmission blocks in the first multicast mode of some embodiments of the present disclosure;

FIG. 9 shows a schematic diagram of dividing four transmission blocks into two transmission block groups for feedback in some embodiments of the present disclosure;

FIG. 10 shows a schematic flowchart of an information retransmission method according to some embodiments of the present disclosure;

FIG. 11 shows a schematic diagram of modules of a receiving terminal according to some embodiments of the present disclosure;

FIG. 12 shows a schematic diagram of modules of a sending terminal according to some embodiments of the present disclosure;

FIG. 13 shows a schematic diagram of the implementation structure of the receiving terminal of the present disclosure;

FIG. 14 shows a schematic diagram of the implementation structure of the sending terminal of the present disclosure.

Detailed ways

In order to make the technical problems, technical solutions, and advantages to be solved by the present disclosure clearer, a detailed description will be given below in conjunction with the drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present disclosure. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for clarity and conciseness, descriptions of known functions and configurations are omitted.

It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present disclosure. Therefore, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

In the various embodiments of the present disclosure, it should be understood that the size of the sequence number of the following processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the present disclosure. The implementation process of some embodiments constitutes any limitation.

In addition, the terms "system" and "network" in this article are often used interchangeably in this article.

In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B based on A does not mean that B is determined only based on A, and B can also be determined based on A and/or other information.

In some embodiments of the present disclosure, the form of the access network is not limited, and may include macro base station (Macro Base Station), micro base station (Pico Base Station), Node B (referred to as 3G mobile base station), and enhanced base station (eNB ), home enhanced base station (Femto eNB or Home eNode B or Home eNB or HeNB), relay station, access point, RRU (Remote Radio Unit, remote radio frequency module), RRH (Remote Radio Head, remote radio head), etc. Access network. The user terminal can be a mobile phone (or cell phone), or other equipment capable of sending or receiving wireless signals, including user equipment, personal digital assistants (PDA), wireless modems, wireless communication devices, handheld devices, laptop computers, cordless phones , Wireless Local Loop (WLL) station, CPE (Customer Premise Equipment, customer terminal) that can convert mobile signals into WiFi signals, or mobile smart hotspots, smart home appliances, or other spontaneous communication with mobile communication networks without human operation Equipment, etc.

Several communication modes discussed in the 3GPP (Third Generation Partnership Project) meeting and their specific feedback channel PSFCH (Physical Sidelink Feedback Channel) design:

1. Unicast mode (one-to-one): each UE uses an independent PSFCH

2. Multicast mode (one-to-many):

Method 1: All UEs share a PSFCH (NACK-based);

Method 2: Each UE uses an independent PSFCH (ACK/NACK);

1): CDM (code division multiplexing), all receiving terminals in the group multiplex the same physical time-frequency resources and the same base sequence, but differentiated by cyclic shifts of different sequences to achieve multi-user multiplexing the goal of.

2): FDM (Frequency Division Multiplexing), all receiving terminals in the group use different physical resources to map the feedback channels, and the time-frequency resources occupy different positions in the frequency domain to achieve the purpose of using independent feedback channels for each terminal.

As shown in FIG. 1, N in FIG. 1 indicates that the PSFCH resource pool (shaded area) appears in a period that every N time slots (slots) share the same feedback resource pool, where N=1, 2, or 4. For the case of N=1, each slot corresponds to a feedback channel. When sending feedback information, the receiving terminal can directly perform one-to-one corresponding feedback.

Specifically, as shown in FIG. 2, the information feedback method provided by the embodiment of the present disclosure is applied to the receiving terminal in the through link sidelink, and specifically includes the following steps:

Step 21: In the case that multiple time slots share the same feedback resource pool, determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots;

In this embodiment, the multiple time slots represent at least two, that is, in the case that at least two time slots share the same feedback resource pool, the receiving terminal determines the transmission block to be sent according to the reception result of the transmission block Feedback status. When the receiving terminal receives the control information sent by the sending terminal, it determines the feedback status of each transmission block according to the results of receiving multiple transmission blocks. The feedback status includes: ACK (Acknowledgement, positive confirmation) status, NACK (Negative Acknowledgement) , Negative Acknowledgement) state, and DTX (Discontinuous Transmission) state. In the DTX state, the transmitting terminal sends data but the receiving terminal fails to decode the control information, and cannot obtain data information such as related sub-channels, and cannot select the feedback channel. Resource location, or the sending terminal does not want to receive the data sent by the terminal.

Step 22: Select the feedback resource position mapped by the feedback channel from the feedback resource position corresponding to the transmission block for which the control information is successfully decoded in the multiple time slots, and send the feedback status identifier of the transmission block through the feedback channel.

The receiving terminal selects the feedback resource mapped by the feedback channel from the feedback resource pool, wherein when selecting the feedback resource, it is selected from the feedback resource positions corresponding to all the transport blocks of the successfully decoded control information, and the feedback resource is selected through the feedback channel. The indicator of the feedback state is fed back to the sending terminal. Since each receiving terminal can only send one PSFCH during feedback, one PSFCH needs to be used to indicate the feedback status of all TBs (Transport Block); however, the number of feedback information bits that can be carried by PSFCH is limited, so it can indicate There is also an upper limit on the number of feedback states. N TBs should actually correspond to N feedback resource locations, and the receiving terminal will only select one of the feedback resource locations to send PSFCH during the final feedback, so the feedback resource location can be further used To indicate the feedback status. The feedback resource location and the feedback status identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.

In this embodiment, the feedback resource position selected by the receiving terminal and the information bits carried in the feedback channel are used to complete the feedback status indication. The maximum feedback information can be carried without adding the feedback channel, and the control information can be decoded in the receiving terminal. In this case, the sending terminal is instructed to retransmit data, which solves the problem that the terminal cannot reliably feedback information due to the fact that no base station participates in scheduling in the direct link.

It should be noted that the feedback status indicator indicates the feedback status of some of the multiple transmission blocks, or the feedback status indicator and the feedback resource location together indicate the overall feedback of multiple transmission blocks. status. That is, the feedback status identifier may indicate the feedback status of a part of the transport block. For example, the sending terminal sends 4 transport block data, and the feedback resource location sending the feedback status identifier indicates that the feedback status of the first transport block is ACK, and the feedback status is ACK. The status identifier indicates that the feedback status of the remaining three transmission blocks are ACK, NACK, and DTX respectively; or, the feedback resource location and the feedback status identifier together indicate that the status of the four transmission blocks are ACK, ACK, NACK, and DTX.

Optionally, the N feedback resource positions can be replaced with log ₂ N-bit information, and each PSFCH carries x-bit information, where when N=2, x=1; when N=4, x=2. That is: in the case where there are two timeslots, the feedback channel carries 1 bit of information to indicate the feedback status identifier; when there are four timeslots, the feedback channel The feedback channel carries 2 bits of information, which is used to indicate the feedback status identifier. Optionally, when N=2, x may also be 2.

For receiving terminals with different communication modes, multiple receiving terminals have different ways of selecting feedback channels when transmitting feedback information. Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback information. Taking N=2 as an example, the same terminal sends two transport blocks TB1 (Transport Block) and TB2 on two consecutive slots, as shown in Figure 3, because the two TBs are on different slots, and The position of the sub-channels in the frequency domain may also be different, so whether it is unicast or multicast mode two (receiving terminals use independent feedback channels), independent feedback resources can be determined for all receiving terminals. There is a set of independent feedback resources corresponding to the sending and receiving terminals. The feedback channels corresponding to two TBs in unicast mode are shown in Figure 4; in the second mode of multicast, there are three receiving terminals (User Equipment, UE). As an example, the feedback channels corresponding to two TBs are shown in Figure 5.

When the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information sent by the receiving terminal that needs to perform data retransmission. Taking N=2 and three receiving terminals as an example, for multicast mode 1, NACK-based feedback is shown in Fig. 6, and all receiving terminals share the same feedback channel.

When N=4, the same terminal sends four transmission blocks TB1, TB2, TB3, and TB4 on four consecutive slots, as shown in FIG. 7. Since the four TBs are in different slots, and the sub-channel positions in the frequency domain may also be different, no matter whether it is unicast unicast or multicast mode two, independent feedback channels can be determined for all receiving terminals. Figure 8 shows a set of independent feedback resources corresponding to the receiving and sending terminals.

Optionally, the receiving terminal stores a corresponding relationship between feedback information and the feedback status of each transport block, and the feedback information includes: the feedback resource location mapped by the feedback channel and the feedback channel sent by the feedback channel. Feedback status indicator. It should be noted that the same correspondence relationship as that in the receiving terminal is also stored in the sending terminal. After determining the feedback status of the multiple transmission blocks, the receiving terminal determines the feedback status identifier to be fed back to the sending terminal and the location where the feedback status identifier is sent according to the stored correspondence relationship. After acquiring the feedback status identifier, the sending terminal determines the feedback status of each transmission block based on the feedback status identifier and the feedback resource location where the feedback status identifier is acquired, and compares the corresponding relationship to determine the feedback status of each transmission block, thereby determining whether it is necessary Data retransmission is performed on each of the transmission blocks.

The corresponding relationship between the feedback information and the feedback status of each transmission block can be expressed in the form of a table, and the corresponding relationship table stored in the receiving terminal and stored in the sending terminal is completely consistent, which can ensure that the receiving terminal Feed back information or send data accurately at the corresponding feedback resource location with the sending terminal. It should be noted that in the correspondence table, since the feedback resource location and the feedback status identifier carried by the feedback channel are combined to indicate the feedback status, it should be ensured that the feedback resource location should avoid the unusable corresponding to the transmission block in the DTX state. Location of feedback resources.

The following specifically describes the conditions that the corresponding relationship should meet.

For the second method in the unicast mode or the multicast mode between the receiving terminal and the sending terminal, optionally, the correspondence relationship includes:

1) In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback resource location corresponds to the The feedback state of the transmission block is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the plurality of transmission blocks, the feedback information is a non-feedback state.

For example: Taking multiple time slots as two, that is, the number of transmission blocks is two as an example, the feedback resource positions corresponding to the two transmission blocks are PSFCH1 and PSFCH2 respectively, and unicast is used between the receiving terminal and the sending terminal. In mode or multicast mode, the receiving terminal sends feedback information on PSFCH1/PSFCH2 resources. The feedback channel itself can carry 1-bit information. The above-mentioned correspondence 1) can be expressed in the form of a table, so the feedback status includes but is not limited to the following table 1:

Table 1

反馈状态(TB1，TB2)Feedback status (TB1, TB2)	对应反馈信息Corresponding feedback information
ACK，ACKACK, ACK	PSFCH1->1PSFCH1->1
ACK，NACK/DTXACK, NACK/DTX	PSFCH1->0PSFCH1->0
NACK/DTX，ACKNACK/DTX, ACK	PSFCH2->1PSFCH2->1
NACK/DTX，NACK/DTXNACK/DTX, NACK/DTX	无反馈No feedback

The first information PSFCH1/PSFCH2 in the feedback information in Table 1 represents the position of the feedback resource selected by the receiving terminal, and the second information "1" or "0" represents the bit information carried by the feedback channel itself, that is, the feedback status identifier, which is determined by the table 1 It can be seen that when the receiving terminal determines that the feedback status of the two transport blocks is ACK and ACK, it needs to send the feedback status identifier "1" at the feedback resource location PSFCH1; the receiving terminal is determining the status of the two transport blocks. When the feedback status is ACK, NACK/DTX, the feedback status identifier "0" needs to be sent at the feedback resource location PSFCH1; when the receiving terminal determines that the feedback status of the two transport blocks is NACK/DTX and NACK/DTX, no feedback information. It is ensured that the feedback status of the transport block corresponding to the feedback resource location in the corresponding relationship is a positive acknowledgement ACK status.

It should be noted that the receiving terminal can only send feedback on the feedback resource corresponding to the TB that successfully decodes the control information. For a TB whose feedback status is NACK/DTX, the receiving terminal (which may be in DTX status) cannot guarantee feedback The location corresponding to the resource, therefore, feedback can only be performed on the feedback resource corresponding to the TB whose feedback status is ACK. The first information may indicate that one of the TBs is in the ACK state, and the second information may indicate that the reception state of the other TB is "0/1". However, the second information can also be used to distinguish the overall detection status, rather than simply indicating the feedback status of one of the TBs.

The sending terminal needs to detect the location of each feedback resource, and finally, according to the feedback resource location where the feedback status identifier is detected, and the feedback status identifier carried by the feedback channel, the feedback status of each TB is determined by comparing the corresponding relationship in the above table, NACK The /DTX state indicates that the TB needs to be retransmitted; if the sending terminal detects that no feedback information is detected at all feedback resource locations, all TBs need to be retransmitted at this time; if the DTX is caused by the sending terminal not sending data, then the sending terminal There will be no reaction to this state.

For example: Taking 4 time slots as an example, that is, 4 transmission blocks, the receiving terminal sends the feedback status identifier on the PSFCH1/PSFCH2/PSFCH3/PSFCH4 resource. The feedback channel itself can carry 2 bits of information. When the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the above corresponding relationship 1) can be expressed in the form of a table, so the feedback status includes but is not limited to the following table 2:

Table 2

反馈状态(TB1，TB2，TB3，TB4)Feedback status (TB1, TB2, TB3, TB4)	对应反馈信息Corresponding feedback information
ACK，ACK，ACK，ACKACK, ACK, ACK, ACK	PSFCH4->11PSFCH4->11
ACK，ACK，ACK，NACK/DTXACK, ACK, ACK, NACK/DTX	PSFCH3->11PSFCH3->11
ACK，ACK，NACK/DTX，ACKACK, ACK, NACK/DTX, ACK	PSFCH4->10PSFCH4->10
ACK，ACK，NACK/DTX，NACK/DTXACK, ACK, NACK/DTX, NACK/DTX	PSFCH1->11PSFCH1->11
ACK，NACK/DTX，ACK，ACKACK, NACK/DTX, ACK, ACK	PSFCH3->10PSFCH3->10
ACK，NACK/DTX，ACK，NACK/DTXACK, NACK/DTX, ACK, NACK/DTX	PSFCH1->10PSFCH1->10
ACK，NACK/DTX，NACK/DTX，ACKACK, NACK/DTX, NACK/DTX, ACK	PSFCH1->01PSFCH1->01
ACK，NACK/DTX，NACK/DTX，NACK/DTXACK, NACK/DTX, NACK/DTX, NACK/DTX	PSFCH1->00PSFCH1->00
NACK/DTX，ACK，ACK，ACKNACK/DTX, ACK, ACK, ACK	PSFCH2->11PSFCH2->11
NACK/DTX，ACK，ACK，NACK/DTXNACK/DTX, ACK, ACK, NACK/DTX	PSFCH2->10PSFCH2->10
NACK/DTX，ACK，NACK/DTX，ACKNACK/DTX, ACK, NACK/DTX, ACK	PSFCH2->01PSFCH2->01
NACK/DTX，ACK，NACK/DTX，NACK/DTXNACK/DTX, ACK, NACK/DTX, NACK/DTX	PSFCH2->00PSFCH2->00
NACK/DTX，NACK/DTX，ACK，ACKNACK/DTX, NACK/DTX, ACK, ACK	PSFCH3->01PSFCH3->01
NACK/DTX，NACK/DTX，ACK，NACK/DTXNACK/DTX, NACK/DTX, ACK, NACK/DTX	PSFCH3->00PSFCH3->00
NACK/DTX，NACK/DTX，NACK/DTX，ACKNACK/DTX, NACK/DTX, NACK/DTX, ACK	PSFCH4->00PSFCH4->00
NACK/DTX，NACK/DTX，NACK/DTX，NACK/DTXNACK/DTX, NACK/DTX, NACK/DTX, NACK/DTX	无反馈No feedback

The first half of the feedback information in Table 2 represents the location of the feedback resource selected by the receiving terminal, and the second half of the 2-bit information represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. It can be seen from Table 2 that when the receiving terminal determines that the feedback status of the four transport blocks is ACK, ACK, ACK, ACK, it needs to send the feedback identifier "11" at the feedback resource location PSFCH4; When the feedback status of the two transport blocks is ACK, ACK, ACK, NACK/DTX, it is necessary to send the feedback status identifier "11" and so on at the feedback resource location PSFCH3, where the 2-bit feedback status identifier information and the feedback resource location It collectively indicates the feedback status of the four transport blocks. The correspondence relationship contained in Table 2 ensures that the feedback state of the transport block corresponding to the feedback resource location is a positive acknowledgement ACK state. Only in this way can it be ensured that the receiving terminal always correctly selects the resource location for sending feedback. If the receiving state of the TB corresponding to the feedback resource location is NACK/DTX, if the receiving terminal encounters that the receiving state of the TB is DTX during the actual feedback of the receiving terminal, the receiving terminal cannot send feedback at the feedback resource location corresponding to the TB, resulting in There was an error in the feedback.

The sending terminal needs to detect the location of each feedback resource, and finally, according to the feedback resource location where the feedback status identifier is detected, and the feedback status identifier carried by the feedback channel, the receiving status of each TB is determined by comparing the corresponding relationship in Table 2 above. The NACK/DTX state indicates that the TB needs to be retransmitted; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, all TBs need to be retransmitted at this time.

Optionally, for the above-mentioned correspondence 1), in the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, The feedback state of the transport block corresponding to the feedback resource location is the ACK state. If there is no ACK state among the multiple feedback states of the transport block, and only NACK and DTX exist, then the NACK state can be used for transmission at this time The feedback resource location corresponding to the block sends the feedback status identifier. Then when N=2, the above corresponding relationship 1) can be expressed as the following Table 3 in the form of a table at this time, so the feedback status includes but is not limited to the following Table 3:

table 3

反馈状态(TB1，TB2)Feedback status (TB1, TB2)	对应反馈信息Corresponding feedback information
ACK，ACKACK, ACK	PSFCH1->0PSFCH1->0
ACK，NACK/DTXACK, NACK/DTX	PSFCH1->1PSFCH1->1
NACK/DTX，ACKNACK/DTX, ACK	PSFCH2->1PSFCH2->1
NACK/DTX，NACKNACK/DTX, NACK	PSFCH2->0PSFCH2->0
NACK/DTX，DTXNACK/DTX, DTX	不反馈No feedback

When N=4, the above-mentioned corresponding relationship 1) can be expressed as the following Table 4 in the form of a table at this time, so the feedback status includes but is not limited to the following Table 4:

Table 4

反馈状态(TB1，TB2，TB3，TB4)Feedback status (TB1, TB2, TB3, TB4)	对应反馈信息Corresponding feedback information
ACK，ACK，ACK，ACKACK, ACK, ACK, ACK	PSFCH4->00PSFCH4->00
ACK，ACK，ACK，NACK/DTXACK, ACK, ACK, NACK/DTX	PSFCH3->00PSFCH3->00
ACK，ACK，NACK/DTX，ACKACK, ACK, NACK/DTX, ACK	PSFCH4->01PSFCH4->01
ACK，ACK，NACK/DTX，NACK/DTXACK, ACK, NACK/DTX, NACK/DTX	PSFCH1->00PSFCH1->00
ACK，NACK/DTX，ACK，ACKACK, NACK/DTX, ACK, ACK	PSFCH3->01PSFCH3->01
ACK，NACK/DTX，ACK，NACK/DTXACK, NACK/DTX, ACK, NACK/DTX	PSFCH1->01PSFCH1->01
ACK，NACK/DTX，NACK/DTX，ACKACK, NACK/DTX, NACK/DTX, ACK	PSFCH1->10PSFCH1->10
ACK，NACK/DTX，NACK/DTX，NACK/DTXACK, NACK/DTX, NACK/DTX, NACK/DTX	PSFCH1->11PSFCH1->11
NACK/DTX，ACK，ACK，ACKNACK/DTX, ACK, ACK, ACK	PSFCH2->00PSFCH2->00
NACK/DTX，ACK，ACK，NACK/DTXNACK/DTX, ACK, ACK, NACK/DTX	PSFCH2->01PSFCH2->01
NACK/DTX，ACK，NACK/DTX，ACKNACK/DTX, ACK, NACK/DTX, ACK	PSFCH2->10PSFCH2->10
NACK/DTX，ACK，NACK/DTX,NACK/DTXNACK/DTX, ACK, NACK/DTX, NACK/DTX	PSFCH2->11PSFCH2->11
NACK/DTX，NACK/DTX，ACK，ACKNACK/DTX, NACK/DTX, ACK, ACK	PSFCH3->10PSFCH3->10
NACK/DTX，NACK/DTX，ACK，NACK/DTXNACK/DTX, NACK/DTX, ACK, NACK/DTX	PSFCH3->11PSFCH3->11
NACK/DTX，NACK/DTX，NACK/DTX，ACKNACK/DTX, NACK/DTX, NACK/DTX, ACK	PSFCH4->11PSFCH4->11
NACK/DTX，NACK/DTX，NACK/DTX，NACKNACK/DTX, NACK/DTX, NACK/DTX, NACK	PSFCH4->10PSFCH4->10
NACK/DTX，NACK/DTX，NACK/DTX，DTXNACK/DTX, NACK/DTX, NACK/DTX, DTX	不反馈No feedback

The foregoing Tables 3 and 4 both satisfy that in the case where the unicast mode or the multicast mode is adopted between the receiving terminal and the transmitting terminal, the feedback state of the transport block corresponding to the feedback resource location is the ACK state, If there is no ACK state and only NACK and DTX among the feedback states of the multiple transmission blocks, then the feedback resource position corresponding to the transmission block in the NACK state can be used to send the feedback state identifier at this time.

2) Mode 2 in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3 If there is an ACK state in the feedback states of the plurality of transmission blocks, the feedback state of the transmission block corresponding to the feedback resource position is the ACK state, and if there is no ACK state in the feedback states of the plurality of transmission blocks, The feedback state of the transmission block corresponding to the feedback resource location is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

In addition, when the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3 If all the three transmission blocks require data retransmission, the feedback status identifier is the first preset status identifier; if none of the three transmission blocks successfully decode the control information, the feedback of the transmission block is not sent Status identification.

For example: for the case of N=4, the maximum number of TBs sent by each sending terminal in each cycle can be limited to 3. At this time, 3 TBs correspond to three corresponding feedback resource positions; the receiving terminal is in PSFCH1/PSFCH2/PSFCH3 The feedback information is sent on the resource. The feedback channel itself can carry 2 bits of information, and the above-mentioned corresponding relationship 2) can be expressed in the form of a table, so the feedback status includes but is not limited to the following Table 5:

table 5

To	反馈状态(TB1，TB2，TB3)Feedback status (TB1, TB2, TB3)	对应反馈信息Corresponding feedback information
11	ACK，ACK，ACKACK, ACK, ACK	PSFCH1->00PSFCH1->00
22	ACK，ACK，NACK/DTXACK, ACK, NACK/DTX	PSFCH2->00PSFCH2->00
33	ACK，NACK/DTX，ACKACK, NACK/DTX, ACK	PSFCH1->01PSFCH1->01
44	NACK/DTX，ACK，ACKNACK/DTX, ACK, ACK	PSFCH2->01PSFCH2->01
55	NACK/DTX，NACK/DTX，ACKNACK/DTX, NACK/DTX, ACK	PSFCH3->00PSFCH3->00
66	NACK/DTX，ACK，NACK/DTXNACK/DTX, ACK, NACK/DTX	PSFCH2->10PSFCH2->10
77	ACK，NACK/DTX，NACK/DTXACK, NACK/DTX, NACK/DTX	PSFCH1->10PSFCH1->10
88	NACK，NACK，NACKNACK, NACK, NACK	PSFCH1->11PSFCH1->11
99	NACK，NACK，DTXNACK, NACK, DTX	PSFCH1->11PSFCH1->11
1010	NACK，DTX，NACKNACK, DTX, NACK	PSFCH1->11PSFCH1->11
1111	DTX，NACK，NACKDTX, NACK, NACK	PSFCH2->11PSFCH2->11
1212	DTX，DTX，NACKDTX, DTX, NACK	PSFCH3->11PSFCH3->11
1313	DTX，NACK，DTXDTX, NACK, DTX	PSFCH2->11PSFCH2->11
1414	NACK，DTX，DTXNACK, DTX, DTX	PSFCH1->11PSFCH1->11
1515	DTX，DTX，DTXDTX, DTX, DTX	无反馈No feedback

The parts numbered 1-7 in Table 5 satisfy the above-mentioned corresponding relationship 2) if there is an ACK state in the feedback states of multiple transport blocks, the feedback state of the transport block corresponding to the feedback resource location is ACK status. For the parts numbered 8-14 in Table 5, since all TBs are required to be retransmitted, the only difference is that feedback can only be done at the position corresponding to the TB (successful decoding control information) whose feedback status is ACK and NACK, so It is only necessary to select different feedback resource locations, but the feedback channels all carry the same first preset state identifier. In this example, the first preset state identifier is "11" as an example.

The sending terminal needs to detect the location of each feedback resource, and finally determine the receiving status of each TB by comparing the corresponding relationship in Table 5 above according to the feedback resource location where the feedback status identifier is detected and the feedback status identifier carried by the feedback channel. , NACK/DTX status indicates that the TB needs to be retransmitted; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, it needs to retransmit all TBs at this time; or no matter which feedback resource location, as long as the status feedback is detected The information state carried by the channel is the first preset state identifier "11", and it is also necessary to retransmit all TBs.

3) When the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback resource location corresponds to all The feedback state of the transport block group is an ACK state, and if there is no ACK state in the feedback states of the two transport block groups, the feedback information is a non-feedback state.

For the case of N=4, the four transmission blocks can be paired in pairs and divided into two large transmission block groups TBa and TBb, and the receiving terminal performs feedback based on the two large transmission block groups, as shown in FIG. 9.

For example: the receiving terminal sends feedback information on the PSFCH1/PSFCH2/PSFCH3/PSFCH4 resources, and the feedback channel itself can carry 1 bit of information. When unicast mode or multicast mode is used between the receiving terminal and the sending terminal, the above Correspondence 3) is expressed in the form of a table, so the feedback status includes but is not limited to the following table 6:

Table 6

反馈状态(TBa，TBb)Feedback status (TBa, TBb)	对应反馈信息Corresponding feedback information
ACK，ACKACK, ACK	PSFCH1/PSFCH2->1PSFCH1/PSFCH2->1
ACK，NACK/DTXACK, NACK/DTX	PSFCH1/PSFCH2->0PSFCH1/PSFCH2->0
NACK/DTX，ACKNACK/DTX, ACK	PSFCH3/PSFCH4->1PSFCH3/PSFCH4->1

NACK/DTX, NACK/DTX

No feedback

The first half of the feedback information in Table 6 represents the location of the feedback resource selected by the receiving terminal, and the second half of 1-bit information represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. It should be noted that the receiving terminal can only send feedback on the feedback resource corresponding to the TB that successfully decodes the control information. For a TB whose feedback status is NACK/DTX, the receiving terminal (which may be in DTX status) cannot guarantee feedback The location corresponding to the resource, therefore, feedback can only be performed on the feedback resource corresponding to the TB whose feedback status is ACK. The correspondence in Table 6 above satisfies that the feedback state of the transport block group corresponding to the feedback resource location is the ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information There is no feedback state.

It should be noted that the feedback status of the transmission block group is determined according to the feedback status of the transmission blocks included in the transmission block group; wherein at least one transmission block in the transmission block group requires the sending terminal to perform data retransmission In the case of, the feedback status identifier of the transmission block group indicates that the sending terminal needs to retransmit the data of the transmission block group. That is, for each transmission block group TBa or TBb, as long as any one of the sub-blocks is in NACK or DTX status, the entire transmission block group needs to be retransmitted as a whole. In addition, the feedback resources corresponding to TB1 and TB2 can both be used to indicate TBa, and the feedback resources corresponding to TB3 and TB4 can also be used to indicate TBb. The specific choice of which feedback resource is not to be protected can be randomly selected.

The sending terminal needs to detect the location of each feedback resource, and finally determine the receiving status of each TB by comparing the corresponding relationship in the above table 4 according to the feedback resource location where the feedback status identifier is detected and the feedback status identifier carried by the feedback channel. , NACK/DTX status indicates that the TB needs to be retransmitted; if the sending terminal detects that no feedback information is detected at all feedback resource locations, it needs to retransmit all TBs at this time.

It should be noted that when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier.

Optionally, in the case that there are two time slots in the plurality of time slots, the feedback channel carries 2 bits of information to indicate the feedback status identifier; a unicast mode is adopted between the receiving terminal and the sending terminal Or in the case of the second method in the multicast mode, the correspondence relationship includes: the feedback status of the transport block corresponding to the feedback resource location is the ACK or NACK status, and if the feedback status of the multiple transport blocks is all DTX state, the feedback information is in a non-feedback state; wherein, when the method 2 in unicast mode or multicast mode is used between the receiving terminal and the transmitting terminal, each receiving terminal uses an independent feedback channel to feed back the information. The feedback status identification.

For example, the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, and the number of time slots is two, that is, the number of transmission blocks is two, and the feedback channel carries 2 bits. Take the information as an example, the feedback resource positions corresponding to the two transport blocks are PSFCH1 and PSFCH2 respectively, and the above corresponding relationship can be expressed in the form of a table. The feedback status includes but is not limited to the following Table 7:

Table 7

反馈状态(TB1，TB2)Feedback status (TB1, TB2)	对应反馈信息Corresponding feedback information
ACK，ACKACK, ACK	PSFCH1->00PSFCH1->00
ACK，NACKACK, NACK	PSFCH1->01PSFCH1->01
NACK，ACKNACK, ACK	PSFCH2->00PSFCH2->00
NACK，NACKNACK, NACK	PSFCH2->01PSFCH2->01
ACK，DTXACK, DTX	PSFCH1->10PSFCH1->10
DTX，ACKDTX, ACK	PSFCH2->10PSFCH2->10
NACK，DTXNACK, DTX	PSFCH1->11PSFCH1->11
DTX，NACKDTX, NACK	PSFCH2->11PSFCH2->11
DTX，DTXDTX, DTX	无反馈No feedback

Table 7 shows the correspondence between the receiving terminal and the sending terminal in the unicast mode or the multicast mode in the second mode, N=2, and the corresponding relationship when the feedback channel carries 2 bits of information. The first information PSFCH1/PSFCH2 in the feedback information in Table 7 represents the location of the feedback resource selected by the receiving terminal, and the second information "00", "10" and so on represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. When there is an ACK/NACK state in the feedback state, the receiving terminal can arbitrarily select the feedback resource location corresponding to the transport block in the ACK or NACK state to send the feedback information.

It should be noted that the receiving terminal can only send feedback information on the feedback resource corresponding to the TB that successfully decodes the control information. The second information is to distinguish the overall feedback status, not just the feedback status of one of the TBs; the sending terminal needs The location of each feedback resource is detected, and finally according to the feedback resource location where the feedback status identifier is detected, and the feedback status identifier carried by the feedback channel, the reception status of each TB is determined by comparing the corresponding relationship in Table 7 above, NACK/ The DTX state indicates that the TB needs to be retransmitted; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, all TBs need to be retransmitted at this time; if the DTX is caused by the sending terminal not sending data, then the sending terminal does not Will react to this state.

The above specific embodiments illustrate the conditions that the corresponding relationship should meet for the second method in the unicast mode or the multicast mode between the receiving terminal and the sending terminal. The following describes the relationship between the receiving terminal and the sending terminal. For a time when the multicast mode is adopted, the corresponding relationship should meet the conditions.

For the first approach in which the multicast mode is adopted between the receiving terminal and the sending terminal, optionally, the correspondence relationship includes:

4) In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transmission block corresponding to the feedback resource position To negatively acknowledge the NACK state, if the NACK state does not exist in the feedback state of the multiple transport blocks, the feedback information is a non-feedback state.

For example, the multicast mode is adopted between the receiving terminal and the sending terminal. The number of time slots is two, that is, the number of transmission blocks is two. The feedback resource positions corresponding to the two transmission blocks are respectively PSFCH1 and PSFCH2. In this communication mode, the receiving terminal will only send feedback information on the PSFCH1/PSFCH2 resources when it detects that the feedback status is NACK. The feedback channel itself can carry 1 bit of information. The above-mentioned corresponding relationship 4) can be It is expressed in the form of a table, so the feedback status includes but not limited to the following table 8:

Table 8

反馈状态(TB1，TB2)Feedback status (TB1, TB2)	对应反馈信息Corresponding feedback information
NACK，NACKNACK, NACK	PSFCH1->1PSFCH1->1
NACK，ACK/DTXNACK, ACK/DTX	PSFCH1->0PSFCH1->0
ACK/DTX，NACKACK/DTX, NACK	PSFCH2->1PSFCH2->1
ACK/DTX，ACK/DTXACK/DTX, ACK/DTX	无反馈No feedback

The first information PSFCH1/PSFCH2 in the feedback information in Table 8 represents the location of the feedback resource selected by the receiving terminal, and the second information represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. It should be noted that the receiving terminal can only send feedback information on the feedback resource corresponding to the TB that successfully decodes the control information. For a TB whose feedback status is ACK/DTX, the receiving terminal (which may be in the DTX state) cannot guarantee the acquisition. The location corresponding to the feedback resource, therefore, feedback can only be performed on the feedback resource corresponding to the TB whose feedback status is NACK. The foregoing Table 8 ensures that the feedback state of the transport block corresponding to the feedback resource location in the corresponding relationship 4) is the NACK state.

The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback status identifier is detected, and the feedback status identifier carried by the corresponding feedback channel, and determine the reception of each TB by comparing the corresponding relationship in Table 8. Status, NACK status indicates that the TB needs to be retransmitted. As long as there is a NACK status in the detection status, the corresponding TB needs to retransmit the TB to all receiving terminals; if the sending terminal detects that all feedback resource locations have not detected the feedback status identifier, No retransmission is required at this time.

For example: Method 1 of multicast mode is adopted between the receiving terminal and the sending terminal. Taking 4 time slots as an example, that is, 4 transmission blocks, the receiving terminal only detects that the feedback status is NACK The feedback status identifier is sent on the PSFCH1/PSFCH2/PSFCH3/PSFCH4 resources. The feedback channel itself can carry 2 bits of information. When the multicast mode is used between the receiving terminal and the sending terminal, the above-mentioned corresponding relationship 4) can be It is expressed in the form of a table, so the feedback status includes but not limited to the following table 9:

Table 9

反馈状态(TB1，TB2，TB3，TB4)Feedback status (TB1, TB2, TB3, TB4)	对应反馈信息Corresponding feedback information
NACK，NACK，NACK，NACKNACK, NACK, NACK, NACK	PSFCH4->11PSFCH4->11
NACK，NACK，NACK，ACK/DTXNACK, NACK, NACK, ACK/DTX	PSFCH3->11PSFCH3->11
NACK，NACK，ACK/DTX，NACKNACK, NACK, ACK/DTX, NACK	PSFCH4->10PSFCH4->10
NACK，NACK，ACK/DTX，ACK/DTXNACK, NACK, ACK/DTX, ACK/DTX	PSFCH1->11PSFCH1->11
NACK，ACK/DTX，NACK，NACKNACK, ACK/DTX, NACK, NACK	PSFCH3->10PSFCH3->10
NACK，ACK/DTX，NACK，ACK/DTXNACK, ACK/DTX, NACK, ACK/DTX	PSFCH1->10PSFCH1->10
NACK，ACK/DTX，ACK/DTX，NACKNACK, ACK/DTX, ACK/DTX, NACK	PSFCH1->01PSFCH1->01
NACK，ACK/DTX，ACK/DTX，ACK/DTXNACK, ACK/DTX, ACK/DTX, ACK/DTX	PSFCH1->00PSFCH1->00
ACK/DTX，NACK，NACK，NACKACK/DTX, NACK, NACK, NACK	PSFCH2->11PSFCH2->11
ACK/DTX，NACK，NACK，ACK/DTXACK/DTX, NACK, NACK, ACK/DTX	PSFCH2->10PSFCH2->10
ACK/DTX，NACK，ACK/DTX，NACKACK/DTX, NACK, ACK/DTX, NACK	PSFCH2->01PSFCH2->01

ACK/DTX，NACK，ACK/DTX，ACK/DTXACK/DTX, NACK, ACK/DTX, ACK/DTX	PSFCH2->00PSFCH2->00
ACK/DTX，ACK/DTX，NACK，NACKACK/DTX, ACK/DTX, NACK, NACK	PSFCH3->01PSFCH3->01
ACK/DTX，ACK/DTX，NACK，ACK/DTXACK/DTX, ACK/DTX, NACK, ACK/DTX	PSFCH3->00PSFCH3->00
ACK/DTX，ACK/DTX，ACK/DTX，NACKACK/DTX, ACK/DTX, ACK/DTX, NACK	PSFCH4->00PSFCH4->00
ACK/DTX，ACK/DTX，ACK/DTX，ACK/DTXACK/DTX, ACK/DTX, ACK/DTX, ACK/DTX	无反馈No feedback

The first half of the feedback information in Table 9 represents the location of the feedback resource selected by the receiving terminal, and the second half of the 2-bit information represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. Table 9 contains that the feedback state of the transport block corresponding to the feedback resource position described in the foregoing correspondence 4) is the NACK state. Only in this way can it be ensured that the receiving terminal always correctly selects the resource location for sending feedback. If the receiving state of the TB corresponding to the feedback resource location is ACK/DTX, if the receiving terminal encounters that the receiving state of the TB is DTX in the actual feedback process of the receiving terminal, the receiving terminal cannot send feedback at the feedback resource location corresponding to the TB, which leads to There was an error in the feedback.

The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback information is detected, and the feedback status identifier carried by the corresponding feedback channel, and determine the receiving status of each TB by comparing the corresponding relationship in Table 9 , The NACK state means that the TB needs to be retransmitted. As long as there is a NACK state in the detection state, the corresponding TB needs to retransmit the TB to all receiving terminals; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, it is not Need to retransmit.

5) Method 1 of the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if multiple all There is a NACK state in the feedback state of the transport block, the feedback state of the transport block corresponding to the feedback resource location is the NACK state, and if there is no NACK state in the feedback state of the multiple transport blocks, the feedback information There is no feedback state.

For example: the multicast mode is adopted between the receiving terminal and the sending terminal. For the case of N=4, the maximum number of TBs sent by each sending terminal in each cycle can be limited to 3. At this time, 3 TB corresponds to three corresponding feedback resource positions; the receiving terminal will only send feedback information on PSFCH1/PSFCH2/PSFCH3 resources when the detection status is NACK. The feedback channel itself can carry 2 bits of information. The above corresponding relationship 5) can be shown in the table , So the feedback status includes but is not limited to the following table 10:

Table 10

To	反馈状态(TB1，TB2，TB3)Feedback status (TB1, TB2, TB3)	对应反馈信息Corresponding feedback information
11	NACK，NACK，NACKNACK, NACK, NACK	PSFCH1->00PSFCH1->00
22	NACK，NACK，ACK/DTXNACK, NACK, ACK/DTX	PSFCH2->00PSFCH2->00
33	NACK，ACK/DTX，NACKNACK, ACK/DTX, NACK	PSFCH1->01PSFCH1->01
44	ACK/DTX，NACK，NACKACK/DTX, NACK, NACK	PSFCH2->01PSFCH2->01
55	ACK/DTX，ACK/DTX，NACKACK/DTX, ACK/DTX, NACK	PSFCH3->00PSFCH3->00
66	ACK/DTX，NACK，ACK/DTXACK/DTX, NACK, ACK/DTX	PSFCH2->10PSFCH2->10
77	NACK，ACK/DTX，ACK/DTXNACK, ACK/DTX, ACK/DTX	PSFCH1->10PSFCH1->10
88	ACK/DTX，ACK/DTX，ACK/DTXACK/DTX, ACK/DTX, ACK/DTX	无反馈No feedback

The parts numbered 1-7 in Table 10 satisfy the above corresponding relationship 5). If there is a NACK state in the feedback states of multiple transport blocks, the feedback state of the transport block corresponding to the feedback resource location is NACK status.

The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback status identifier is detected, and the feedback status identifier carried by the corresponding feedback channel, and determine the corresponding relationship of each TB by comparing the corresponding relationship in Table 10 above. In the receiving state, the NACK state indicates that the TB needs to be retransmitted. As long as the NACK state exists in the detection state, the corresponding TB needs to retransmit the TB to all receiving terminals; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, No retransmission is required at this time.

6) In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the position of the feedback resource corresponding to the transport block group The feedback state is the NACK state. If the NACK state does not exist in the feedback states of the two transport block groups, the feedback information is the no feedback state.

For example: Method 1 of multicast mode is used between the receiving terminal and the sending terminal. The receiving terminal will only send feedback information on the PSFCH1/PSFCH2/PSFCH3/PSFCH4 resource when it detects the NACK state. The feedback channel itself can carry 1 Bit information can be expressed in the form of the above corresponding relationship 6), so the feedback status includes but is not limited to the following Table 11:

Table 11

反馈状态(TBa，TBb)Feedback status (TBa, TBb)	对应反馈信息Corresponding feedback information
NACK，NACKNACK, NACK	PSFCH1/PSFCH2->1PSFCH1/PSFCH2->1
NACK，ACK/DTXNACK, ACK/DTX	PSFCH1/PSFCH2->0PSFCH1/PSFCH2->0
ACK/DTX，NACKACK/DTX, NACK	PSFCH3/PSFCH4->1PSFCH3/PSFCH4->1
ACK/DTX，ACK/DTXACK/DTX, ACK/DTX	无反馈No feedback

The first half of the feedback information in Table 11 represents the location of the feedback resource selected by the receiving terminal, and the second half of 1-bit information represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. It should be noted that the receiving terminal can only send feedback on the feedback resource corresponding to the TB that successfully decodes the control information. For a TB whose receiving state is ACK/DTX, the receiving UE (which may be in DTX state) cannot guarantee feedback The location corresponding to the resource, therefore, feedback can only be performed on the feedback resource corresponding to the TB whose reception status is NACK. The corresponding relationship in the above table 11 satisfies the feedback state of the transport block group corresponding to the feedback resource position described in the corresponding relationship 6) is the NACK state, if there is no NACK state in the feedback state of the two transport block groups , The feedback information is in a non-feedback state.

The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback information is detected, and the feedback status identifier carried by the corresponding feedback channel, and determine the reception of each TB by comparing the corresponding relationship in Table 11 above Status, NACK status indicates that the TB needs to be retransmitted. As long as the NACK status is detected in the status, the corresponding TB needs to retransmit the TB to all receiving terminals; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, this There is no need to retransmit.

It should be noted that when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feedbacks that there is a NACK state in the feedback state information.

Optionally, in the case where there are two timeslots, the feedback channel carries 2 bits of information to indicate the feedback status identifier; a multicast mode is adopted between the receiving terminal and the sending terminal In the case of the first manner, the correspondence relationship includes: the feedback state of the transport block corresponding to the feedback resource location is the NACK state, and if the NACK state does not exist in the feedback state of the multiple transport blocks, the The feedback information is in a non-feedback state; wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only the feedback state exists NACK status feedback information.

For example, the multicast mode is adopted between the receiving terminal and the sending terminal. The number of time slots is two, that is, the number of transmission blocks is two, and the feedback channel carries 2 bits of information as an example. When the terminal sends feedback information on the PSFCH1/PSFCH2 resources, the above corresponding relationship can be expressed in the form of a table, and the feedback status includes but is not limited to the following Table 12:

Table 12

反馈状态(TB1,TB2)Feedback status (TB1, TB2)	对应反馈信息Corresponding feedback information
ACK，NACKACK, NACK	PSFCH2->00PSFCH2->00
NACK，ACKNACK, ACK	PSFCH1->00PSFCH1->00
NACK，NACKNACK, NACK	PSFCH1->01PSFCH1->01
NACK，DTXNACK, DTX	PSFCH1->10PSFCH1->10
DTX，NACKDTX, NACK	PSFCH2->10PSFCH2->10
ACK/DTX，ACK/DTXACK/DTX, ACK/DTX	无反馈No feedback

Table 12 shows the corresponding relationship when the multicast mode is adopted between the receiving terminal and the sending terminal, N=2, and the feedback channel carries 2 bits of information. The first information PSFCH1/PSFCH2 in the feedback information in Table 12 represents the location of the feedback resource selected by the receiving terminal, and the second information "00", "01", etc. represents the bit information carried by the feedback channel itself, that is, the feedback status identifier. When there is a NACK state in the feedback state, the receiving terminal can arbitrarily select the feedback resource location corresponding to the transport block in the NACK state to send the feedback information.

It should be noted that the receiving terminal can only send feedback information on the feedback resource corresponding to the TB that successfully decodes the control information. The second information is to distinguish the overall feedback state, and does not merely indicate the feedback state of one of the TBs. The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback information is detected, and the feedback status identifier carried by the corresponding feedback channel, and determine the reception of each TB by comparing the corresponding relationship in Table 12 above. Status, NACK status indicates that the TB needs to be retransmitted. As long as the NACK status is detected in the status, the corresponding TB needs to retransmit the TB to all receiving terminals; if the sending terminal detects that no feedback information is detected at all the feedback resource locations, this There is no need to retransmit.

The above specific embodiments have explained the conditions that the corresponding relationship should satisfy when the multicast mode is adopted between the receiving terminal and the sending terminal.

Optionally, in a case where multiple transmission blocks are divided into two transmission block groups, the sending the feedback status identifier of the transmission block through the feedback channel includes:

The feedback status identifier of the transmission block group is sent through the feedback channel; the feedback resource position corresponding to the transmission block group is the feedback resource position corresponding to any transmission block in the transmission block group. At this time, it is equivalent to roll back the case of N=4 to the case of N=2. When N=2 is directly multiplexed, the receiving terminal of various communication modes sends the feedback information to the realization process of returning to the situation after N=2. The content of the specific scheme will not be repeated.

As shown in FIG. 10, an embodiment of the present disclosure provides an information retransmission method, which is applied to a sending terminal in a through link sidelink, including:

Step 101: Obtain a feedback status identifier.

In this embodiment, after the sending terminal sends control information to the receiving terminal, it obtains the identifier of the feedback status sent by the receiving terminal. The feedback status includes: ACK status, NACK status, and DTX status. In the DTX status, the sending terminal sends However, the receiving terminal fails to decode the control information, cannot obtain data information such as related sub-channels, and cannot select the feedback channel resource location.

Step 102: Determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location for which the feedback status identifier is obtained; wherein, the feedback resource location and the feedback status identifier Commonly indicate whether the sending terminal needs to retransmit data for each of the transmission blocks.

The feedback status identifier sent by the receiving terminal and the feedback resource location of the feedback status identifier acquired by the sending terminal above together indicate whether the sending terminal needs to perform data retransmission for each transmission block. After the sending terminal obtains the feedback status identifier and the feedback resource location, it determines whether each transport block data needs to be retransmitted, and after determining the transport block data that needs to be retransmitted, the sending terminal provides an answer to the one or more receiving terminals that receive the transport block. Retransmit the data.

Optionally, when there are multiple receiving terminals, the feedback state identifier is detected at the feedback resource positions corresponding to all receiving terminals. That is, the sending terminal needs to detect the feedback resource locations that may be used by each receiving terminal one by one, and finally judge whether it needs to retransmit for the receiving terminal according to the detected feedback status identifier and the feedback resource location.

For receiving terminals with different communication modes, multiple receiving terminals have different ways of selecting feedback channels when transmitting feedback information. Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback information. When the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information sent by the receiving terminal that needs to perform data retransmission.

Optionally, the sending terminal stores a correspondence between feedback information and the feedback status of each transport block, and the feedback information includes: the feedback resource location mapped by the feedback channel and the feedback channel sent by the feedback channel. Feedback status indicator. It should be noted that the corresponding relationship stored in the sending terminal is the same as the corresponding relationship stored in the receiving terminal.

Specifically, the determining whether to perform data retransmission for each transmission block includes: determining whether to perform data retransmission for each transmission block according to the feedback status corresponding to the feedback status identifier and the feedback resource location in the corresponding relationship. The transmission block performs data retransmission.

The corresponding relationship between the feedback information and the feedback status of each transmission block can be expressed in the form of a table, and the corresponding relationship table stored in the sending terminal and the receiving terminal is completely consistent, which can ensure that the receiving terminal Feed back information or send data accurately at the corresponding feedback resource location with the sending terminal. It should be noted that in the correspondence table, since the feedback resource location and the feedback status identifier carried by the feedback channel are combined to indicate the feedback status, it should be ensured that the feedback resource location should avoid the unusable corresponding to the transmission block in the DTX state. Location of feedback resources.

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if There is an ACK state in the feedback states of the plurality of transmission blocks, and the feedback state of the transmission block corresponding to the feedback resource position is the ACK state. If there is no ACK state in the feedback states of the plurality of transmission blocks, the The feedback state of the transmission block corresponding to the feedback resource location is the NACK state. If multiple transmission blocks are in the DTX state, the feedback information is the no feedback state; in this correspondence, the sending terminal is in the multiple In the case of 4 time slots, set the maximum number of transmission blocks transmitted by the transmitting terminal in each cycle to 3;

The above-mentioned respective correspondences can be expressed in the form of a table. The form of the table in this embodiment and the method for the power generating terminal to obtain the feedback status identifier are the same as in the above-mentioned embodiment of the information feedback method, and will not be repeated here.

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if multiple transmissions There is a NACK state in the feedback state of the block, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is none Feedback status. In this correspondence, the sending terminal sets the maximum number of transmission blocks transmitted by the sending terminal in each cycle to 3 when the multiple time slots are 4;

In the case that the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback status of the transport block corresponding to the feedback resource location is the ACK or NACK status. If the feedback state of the transmission block is all DTX state, the feedback information is no feedback state;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if the feedback state of the multiple transport blocks is If there is no NACK state, the feedback information is a no feedback state;

The corresponding relationship may be expressed in the form of a table. The form of the table in this embodiment and the method for the power generating terminal to obtain the feedback status identifier are the same as in the above-mentioned embodiment of the information feedback method, and will not be repeated here.

When the feedback status identifier sent by at least one receiving terminal indicates that the transmission block needs to be retransmitted, detecting whether to send the transmission block to the receiving terminal; sending the transmission to the receiving terminal at the sending terminal In the case of a block, the transmission block data is retransmitted to the at least one receiving terminal; when the feedback status indicator indicates that the transmission block does not need to be retransmitted, or the sending terminal does not send data to the receiving terminal When the terminal sends the transmission block, data retransmission is not performed on the transmission block.

In this embodiment, for a receiving terminal in unicast or multicast mode two, in the feedback information obtained by the sending terminal, when there is at least one of the feedback status indicating that the transmission block needs to be retransmitted, the The status of the transport block may be NACK/DTX, so it is necessary to determine whether the sending terminal has sent data. If data is sent, the sending terminal retransmits the transport block data to the receiving terminal that sent the feedback status. If in the feedback information obtained by the sending terminal, multiple feedback statuses indicate that the transport block data does not need to be retransmitted, or the feedback status is caused by the sending terminal not sending data, although the sending terminal has received the information indicating that the data needs to be retransmitted , But will not react to the status, that is, there is no need to retransmit data.

For the receiving terminal of unicast or multicast mode 2, if the sending terminal detects the feedback information of "01" at the feedback resource location corresponding to TB2, the "0" indicates that TB1 data needs to be retransmitted, and "1" indicates that it is not needed TB2 data is retransmitted, and the sending terminal sends TB1 data, so TB1 needs to be retransmitted.

Taking the communication mode of the receiving terminal as unicast mode, the receiving terminal transmits the feedback information through two feedback channels, and N=2 as an example, the sending terminal sends two TBs, but only corresponds to TB2 If the PSFCH2 receives the ACK feedback from TB2, but does not receive the feedback information from TB1, it can be determined that TB1 is in the DTX state and needs to be retransmitted. Then the TB1 data is retransmitted on the PSFCH1 corresponding to TB1.

In this embodiment, for the receiving terminal of multicast mode 1, in the feedback information obtained by the sending terminal, as long as the feedback status corresponding to a certain transmission block is detected to indicate that data retransmission is required, the sending terminal will retransmit all receiving terminals. Transfer the transmission block data.

For multicast mode 1, taking a total of 3 receiving terminals, each receiving terminal feedback information through two feedback channels as an example, UE1, UE2, and UE3 feedback the status of TB1 and TB2, and the feedback channels for sending feedback information are PSFCH1 and PSFCH2, PSFCH1 carries the feedback status of TB1, and PSFCH2 carries the feedback status of TB2. However, in this mode, the receiving terminal will only send feedback information after detecting NACK. Assuming that the feedback status indicator that UE1 needs to retransmit data is detected on PSFCH1, the sending terminal needs to retransmit TB1 data to the three receiving terminals.

In the case that the feedback status identifier is not obtained, all transmission blocks do not need to perform data retransmission. This situation applies to the first method where the communication mode of the receiving terminal is multicast. The sending terminal needs to detect the location of each feedback resource, and finally summarize all the feedback resource locations where the feedback status identifier is detected, and the corresponding feedback channel carry If the sending terminal detects that none of the feedback resource locations has detected the feedback status identifier, there is no need to retransmit at this time.

When the first preset state identifier is obtained, data retransmission is performed on all transmission blocks. In this case, the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3 In this case, if all the three transmission blocks require data retransmission, the receiving terminal sends a first preset state identifier; all transmission blocks indicated by the first preset state identifier need to be retransmitted.

It should be noted that when the method 2 in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback information, and the sending terminal is in an independent The feedback channel separately obtains the feedback information fed back by each receiving terminal; when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, then the sending The terminal obtains the feedback information fed back by each receiving terminal in the same feedback channel. It should be noted that the methods applicable to the sending terminal in the foregoing information feedback method embodiments are all applicable to the information retransmission method embodiments, and details are not described herein.

As shown in FIG. 11, the second embodiment of the present disclosure provides a terminal. The terminal is a receiving terminal 110 and includes:

The first determining module 111 is configured to determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots when multiple time slots share the same feedback resource pool;

The first sending module 112 is configured to select the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks for which the control information is successfully decoded in the multiple time slots, and send the transmission block through the feedback channel The feedback status identification;

Optionally, the corresponding relationship includes:

Optionally, the first sending module is specifically configured to:

It should be noted that the terminal is a terminal corresponding to the foregoing information feedback method, and all implementation manners in the foregoing method embodiment are applicable to the embodiment of the terminal, and the same technical effect can also be achieved. In this embodiment, the feedback resource position selected by the receiving terminal and the information bits carried in the feedback channel are used to complete the feedback status indication. The maximum feedback information can be carried without adding the feedback channel, and the control information can be decoded in the receiving terminal. In this case, the sending terminal is instructed to retransmit data, which solves the problem that the terminal cannot reliably feedback information due to the fact that no base station participates in scheduling in the direct link.

As shown in FIG. 12, an embodiment of the present disclosure also provides a terminal, where the terminal is a sending terminal 120 and includes:

The first obtaining module 121 is configured to obtain a feedback status identifier;

The second determining module 122 is configured to determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

Optionally, the first acquiring module 121 is specifically configured to: when there are multiple receiving terminals, detect the feedback state identifier at the feedback resource locations corresponding to all receiving terminals.

The second determining module 122 is specifically configured to determine whether to perform data retransmission for each transmission block according to the feedback state corresponding to the feedback state identifier and the feedback resource location in the corresponding relationship.

Optionally, the corresponding relationship includes:

When the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission corresponding to the feedback resource position The feedback state of the block group is the ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is the no feedback state;

Optionally, the corresponding relationship includes:

Wherein, when the second mode in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier.

Optionally, in the case that the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the second determining module 122 includes:

A detecting unit, configured to detect whether to send the transmission block to the receiving terminal when the feedback status identifier sent by at least one receiving terminal indicates that the transmission block needs to be retransmitted;

The first data transmission unit is configured to retransmit the transmission block data to the at least one receiving terminal when the transmitting terminal sends the transmission block to the receiving terminal;

Optionally, in a case where the multicast mode is adopted between the receiving terminal and the sending terminal, the second determining module 122 includes:

The second data transmission unit is configured to, in all the feedback resource locations for which the feedback status identifier is obtained, there is at least one feedback status identifier sent by the receiving terminal, indicating that the transmission block data needs to be retransmitted, and the sending terminal sends a message to the receiving terminal. When the terminal sends the transmission block, retransmit the transmission block data to all receiving terminals that receive the transmission block.

Optionally, the second determining module 122 is further configured to:

Optionally, the terminal further includes:

The setting module is used to set the maximum number of transmission blocks transmitted by the sending terminal in each cycle to 3 when the number of multiple time slots is 4.

It should be noted that the terminal is a terminal corresponding to the foregoing information retransmission method, and all implementation manners in the foregoing method embodiment are applicable to the embodiment of the terminal, and the same technical effect can also be achieved. In this embodiment, the feedback resource position selected by the receiving terminal and the information bits carried in the feedback channel are used to complete the feedback status indication. The maximum feedback information can be carried without adding the feedback channel, and the control information can be decoded in the receiving terminal. In this case, the sending terminal is instructed to retransmit data, which solves the problem that the terminal cannot reliably feedback information due to the fact that no base station participates in scheduling in the direct link.

In order to better achieve the above purpose, as shown in FIG. 13, some embodiments of the present disclosure also provide a terminal. The terminal is a receiving terminal and includes a transceiver 134, a memory 133, a processor 131, and a device stored in the memory. A computer program that can run on a processor.

The memory 133 is connected to the processor 131 through a bus interface 132. The memory 133 is used to store programs and data used by the processor 131 when performing operations. When the processor 131 calls and executes the memory 133 When the stored programs and data are stored, the steps of the above-mentioned information feedback method are executed.

Among them, the transceiver 134 is connected to the bus interface 132 and is used to receive and send data under the control of the processor 131. Specifically, the processor 131 implements the following steps when executing the computer program:

Optionally, the corresponding relationship includes:

It should be noted that in FIG. 13, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 131 and various circuits of the memory represented by the memory 133 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 134 may be a plurality of elements, including a transmitter and a transceiver, and provide a unit for communicating with various other devices on the transmission medium. For different terminals, the user interface 135 may also be an interface capable of connecting externally and internally with required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 131 is responsible for managing the bus architecture and general processing, and the memory 133 can store data used by the processor 131 when performing operations.

Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be implemented by hardware, or by a computer program to instruct relevant hardware. The computer program includes instructions for executing part or all of the steps of the above-mentioned method. ; And the computer program can be stored in a readable storage medium, which can be any form of storage medium.

As shown in FIG. 14, some embodiments of the present disclosure also provide a terminal. The terminal is a transmitting terminal and includes a transceiver 144, a memory 143, a processor 141, and a computer stored in the memory and running on the processor. program.

The memory 143 is connected to the processor 141 through a bus interface 142, and the memory 143 is used to store programs and data used by the processor 141 when performing operations. When the processor 141 calls and executes the memory 143 When the stored programs and data are stored, the steps of the above-mentioned information feedback method are executed.

Wherein, the transceiver 144 is connected to the bus interface 142, and is used to receive and send data under the control of the processor 141. Specifically, the processor 141 implements the following steps when executing the computer program:

Obtain the feedback status identifier;

Optionally, the corresponding relationship includes:

Optionally, in the case that the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the processor implements the following steps when executing the computer program:

Optionally, in the case that the multicast mode is adopted between the receiving terminal and the sending terminal, the following steps are implemented when the processor executes the computer program:

It should be noted that in FIG. 14, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 141 and various circuits of the memory represented by the memory 143 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 144 may be a plurality of elements, including a transmitter and a transceiver, and provide a unit for communicating with various other devices on the transmission medium. For different terminals, the user interface 145 may also be an interface capable of connecting externally and internally with required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 141 is responsible for managing the bus architecture and general processing, and the memory 143 can store data used by the processor 141 when performing operations.

In addition, specific embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, where the program is executed by a processor to implement steps in the above-mentioned information feedback method or information retransmission method. And can achieve the same technical effect, in order to avoid repetition, I will not repeat them here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk, or optical disk, etc.

It can be understood that the embodiments described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, modules, units, sub-modules, sub-units, etc. can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processing, DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, Other electronic units or combinations thereof that perform the functions described in the present disclosure.

In addition, it should be pointed out that in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined. These decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure. In addition, the steps of performing the above series of processing can naturally be performed in a chronological order in the order of description, but do not necessarily need to be performed in a chronological order, and some steps can be performed in parallel or independently of each other. A person of ordinary skill in the art can understand that all or any of the steps or components of the methods and devices of the present disclosure can be used in any computing device (including a processor, storage medium, etc.) or a network of computing devices with hardware and firmware. , Software or a combination of them, this can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.

Therefore, the purpose of the present disclosure can also be realized by running a program or a group of programs on any computing device. The computing device may be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure. Obviously, the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined. These decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order in the order of description, but do not necessarily need to be performed in chronological order. Some steps can be performed in parallel or independently of each other.

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present disclosure, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present disclosure.

Claims

An information feedback method, applied to a receiving terminal in a through link sidelink, includes:

In the case that multiple time slots share the same feedback resource pool, determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots;

Selecting the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks on which the control information is successfully decoded in the multiple time slots, and sending the feedback status identifier of the transmission block through the feedback channel;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
The method according to claim 1, wherein the corresponding relationship between feedback information and the feedback status of each transport block is stored in the receiving terminal, and the feedback information includes: the location of the feedback resource mapped by the feedback channel and the The feedback status identifier sent by the feedback channel.
The method according to claim 1 or 2, wherein the feedback status indicator indicates the feedback status of some of the multiple transmission blocks, or the feedback status indicator and the feedback resource location together indicate multiple The overall feedback status of each of the transmission blocks.
The method according to claim 2, wherein the corresponding relationship comprises:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the transmission block corresponding to the feedback resource position The feedback state of is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if There is an ACK state in the feedback states of the plurality of transmission blocks, and the feedback state of the transmission block corresponding to the feedback resource position is the ACK state. If there is no ACK state in the feedback states of the plurality of transmission blocks, the The feedback state of the transmission block corresponding to the feedback resource location is the NACK state, and if a plurality of the transmission blocks are in the discontinuous transmission DTX state, the feedback information is the no feedback state;

When the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission corresponding to the feedback resource position The feedback state of the block group is the ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is the no feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier.
The method according to claim 2, wherein the corresponding relationship comprises:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transmission block corresponding to the feedback resource location is negative Confirming the NACK status, and if there is no NACK status in the feedback status of the multiple transport blocks, the feedback information is a non-feedback status;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if multiple transmissions There is a NACK state in the feedback state of the block, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is none Feedback status

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource position It is a NACK state, and if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The method according to claim 4 or 5, wherein, in the case where there are two time slots in the plurality of time slots, the feedback channel carries 1 bit of information for indicating the feedback status identifier;

In a case where the multiple time slots are 4, the feedback channel carries 2 bits of information, which is used to indicate the feedback status identifier.
The method according to claim 2, wherein, in the case where there are two time slots in the plurality of time slots, the feedback channel carries 2 bits of information, which is used to indicate the feedback state identifier;

In the case that the unicast mode or the second method in the multicast mode is adopted between the receiving terminal and the sending terminal, the correspondence relationship includes:

The feedback state of the transport block corresponding to the feedback resource location is the ACK or NACK state, and if the feedback states of multiple transport blocks are all in the DTX state, the feedback information is the no feedback state;

Wherein, when the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier;

In the case that the multicast mode is adopted between the receiving terminal and the sending terminal, the corresponding relationship includes: the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if there are multiple If there is no NACK state in the feedback state of the transport block, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The method according to claim 4 or 5, wherein the feedback status of the transport block group is determined according to the feedback status of the transport blocks included in the transport block group;

Wherein, in the case that at least one transmission block in the transmission block group requires the transmitting terminal to perform data retransmission, the feedback status identifier of the transmission block group indicates that the transmitting terminal needs to perform data retransmission on the transmission block group.
The method according to claim 8, wherein the sending the feedback status identifier of the transport block through the feedback channel comprises:

Sending the feedback status identifier of the transport block group through the feedback channel;

The feedback resource location corresponding to the transmission block group is the feedback resource location corresponding to any transmission block in the transmission block group.
The method according to claim 4, wherein the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the plurality of time slots are 4, and the number of time slots in each cycle When the number of transmission blocks is 3, if all the 3 transmission blocks need to be retransmitted, the feedback state identifier is the first preset state identifier;

If none of the three transmission blocks successfully decode the control information, the feedback status identifier of the transmission block is not sent.
An information retransmission method, applied to a sending terminal in a through link sidelink, includes:

Obtain the feedback status identifier;

Determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
The method according to claim 11, wherein said obtaining the feedback status identifier comprises:

When there are multiple receiving terminals, the feedback state identifier is detected at the feedback resource positions corresponding to all receiving terminals.
The method according to claim 11, wherein the corresponding relationship between feedback information and the feedback status of each transport block is stored in the sending terminal, and the feedback information includes: the location of the feedback resource mapped by the feedback channel and the The feedback status identifier sent by the feedback channel;

The determining whether to perform data retransmission for each transmission block includes:

According to the feedback status corresponding to the feedback status identifier and the feedback resource location in the corresponding relationship, it is determined whether to perform data retransmission for each transmission block.
The method according to claim 11 or 13, wherein the feedback status indicator indicates the feedback status of some of the multiple transmission blocks, or the feedback status indicator and the feedback resource location together indicate multiple The overall feedback status of each of the transmission blocks.
The method according to claim 13, wherein the corresponding relationship comprises:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback of the transmission block corresponding to the feedback resource location The state is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a no feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if there are multiple There is an ACK state in the feedback state of the transport block, the feedback state of the transport block corresponding to the feedback resource position is the ACK state, and if there is no ACK state in the feedback state of the multiple transport blocks, the feedback resource The feedback state of the transmission block corresponding to the position is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

When the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission block group corresponding to the feedback resource position The feedback state of is an ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is a no feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal separately obtains the feedback state identifiers fed back by each receiving terminal in an independent feedback channel.
The method according to claim 13, wherein the corresponding relationship comprises:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transport block corresponding to the feedback resource location is NACK State, if there is no NACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if the number of transmission blocks is 3 There is a NACK state in the feedback state, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is the no feedback state ；

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource location is NACK State, if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal obtains the feedback state identifier fed back by each receiving terminal on the same feedback channel.
The method according to claim 13, wherein, in a case where the plurality of time slots are two and the feedback channel carries 2 bits of information, the correspondence relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback status of the transmission block corresponding to the feedback resource location is the ACK or NACK status. The feedback state of the block is DTX state, then the feedback information is no feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if there is no feedback state of the multiple transport blocks NACK state, the feedback information is no feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The method according to claim 11 or 13, wherein, in the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, it is determined whether to perform data retransmission for each transmission block ,include:

When the feedback status identifier sent by at least one receiving terminal indicates that the transmission block needs to be retransmitted, detecting whether to send the transmission block to the receiving terminal;

In the case that the sending terminal sends the transmission block to the receiving terminal, retransmit the transmission block data to the at least one receiving terminal;

In the case where the feedback status identifier indicates that data retransmission of the transmission block is not required, or the sending terminal does not send the transmission block to the receiving terminal, data retransmission of the transmission block is not performed.
The method according to claim 11 or 13, wherein, in the case where the multicast mode is adopted between the receiving terminal and the sending terminal, determining whether to perform data retransmission for each of the transmission blocks includes:

Among all the feedback resource locations where the feedback status identifier is obtained, there is at least one feedback status identifier sent by the receiving terminal, indicating that the transmission block data needs to be retransmitted, and the sending terminal sends the transmission block to the receiving terminal Next, retransmit the transport block data to all receiving terminals that receive the transport block.
The method according to claim 11 or 13, wherein the step of determining whether to perform data retransmission for each of the transmission blocks includes one of the following:

In the case that the feedback status identifier is not obtained, all transmission blocks do not need to perform data retransmission;

When the first preset state identifier is obtained, data retransmission is performed on all transmission blocks.
The method according to claim 11, further comprising:

In the case where the multiple time slots are 4, the maximum number of transmission blocks transmitted by the transmitting terminal in each cycle is set to 3.
A terminal, the terminal is a receiving terminal, comprising: a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the following when the computer program is executed step:

In the case that multiple time slots share the same feedback resource pool, determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots;

Selecting the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks on which the control information is successfully decoded in the multiple time slots, and sending the feedback status identifier of the transmission block through the feedback channel;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
The terminal according to claim 22, wherein the corresponding relationship between feedback information and the feedback status of each transport block is stored in the receiving terminal, and the feedback information includes: the location of the feedback resource mapped by the feedback channel and the The feedback status identifier sent by the feedback channel.
The terminal according to claim 22 or 23, wherein the feedback status indicator indicates the feedback status of some of the multiple transmission blocks, or the feedback status indicator and the feedback resource location together indicate multiple The overall feedback status of each of the transmission blocks.
The terminal according to claim 23, wherein the corresponding relationship comprises:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the transmission block corresponding to the feedback resource position The feedback state of is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if There is an ACK state in the feedback states of the plurality of transmission blocks, and the feedback state of the transmission block corresponding to the feedback resource position is the ACK state. If there is no ACK state in the feedback states of the plurality of transmission blocks, the The feedback state of the transmission block corresponding to the feedback resource location is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

When the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission corresponding to the feedback resource position The feedback state of the block group is the ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is the no feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier.
The terminal according to claim 23, wherein the corresponding relationship comprises:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transmission block corresponding to the feedback resource location is negative Confirming the NACK status, and if there is no NACK status in the feedback status of the multiple transport blocks, the feedback information is a non-feedback status;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if multiple transmissions There is a NACK state in the feedback state of the block, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is none Feedback status

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource position It is a NACK state, and if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The terminal according to claim 25 or 26, wherein, in a case where there are two time slots in the plurality of time slots, the feedback channel carries 1 bit of information for indicating the feedback status identifier;

In a case where the multiple time slots are 4, the feedback channel carries 2 bits of information, which is used to indicate the feedback status identifier.
The terminal according to claim 23, wherein, in the case where there are two time slots in the plurality of time slots, the feedback channel carries 2 bits of information used to indicate the feedback state identifier;

In the case that the unicast mode or the second method in the multicast mode is adopted between the receiving terminal and the sending terminal, the correspondence relationship includes:

The feedback state of the transport block corresponding to the feedback resource location is the ACK or NACK state, and if the feedback states of multiple transport blocks are all in the DTX state, the feedback information is the no feedback state;

Wherein, when the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier;

In the case that the multicast mode is adopted between the receiving terminal and the sending terminal, the corresponding relationship includes: the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if there are multiple If there is no NACK state in the feedback state of the transport block, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The terminal according to claim 25 or 26, wherein the feedback status of the transport block group is determined according to the feedback status of the transport blocks included in the transport block group;

Wherein, in the case that at least one transmission block in the transmission block group requires the transmitting terminal to perform data retransmission, the feedback status identifier of the transmission block group indicates that the transmitting terminal needs to perform data retransmission on the transmission block group.
The terminal according to claim 29, wherein the processor implements the following steps when executing the computer program:

Sending the feedback status identifier of the transport block group through the feedback channel;

The feedback resource location corresponding to the transmission block group is the feedback resource location corresponding to any transmission block in the transmission block group.
The terminal according to claim 25, wherein the second method in unicast mode or multicast mode is adopted between the receiving terminal and the sending terminal, the plurality of time slots are 4, and the number of time slots in each cycle When the number of transmission blocks is 3, if all the 3 transmission blocks need to be retransmitted, the feedback state identifier is the first preset state identifier;

If none of the three transmission blocks successfully decode the control information, the feedback status identifier of the transmission block is not sent.
A terminal, the terminal is a sending terminal, comprising: a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the following when the computer program is executed step:

Obtain the feedback status identifier;

Determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
The terminal according to claim 32, wherein the processor implements the following steps when executing the computer program:

When there are multiple receiving terminals, the feedback state identifier is detected at the feedback resource positions corresponding to all receiving terminals.
The terminal according to claim 32, wherein the corresponding relationship between feedback information and the feedback status of each transport block is stored in the sending terminal, and the feedback information includes: the feedback resource location mapped by the feedback channel and the The feedback status identifier sent by the feedback channel;

When the processor executes the computer program, the following steps are implemented:

According to the feedback status corresponding to the feedback status identifier and the feedback resource location in the corresponding relationship, it is determined whether to perform data retransmission for each transmission block.
The terminal according to claim 32 or 34, wherein the feedback status indicator indicates the feedback status of some of the multiple transmission blocks, or the feedback status indicator and the feedback resource location together indicate multiple The overall feedback status of each of the transmission blocks.
The terminal according to claim 34, wherein the corresponding relationship comprises:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback of the transmission block corresponding to the feedback resource location The state is a positive acknowledgement ACK state, and if there is no ACK state among the feedback states of the multiple transport blocks, the feedback information is a no feedback state;

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if there are multiple There is an ACK state in the feedback state of the transport block, the feedback state of the transport block corresponding to the feedback resource position is the ACK state, and if there is no ACK state in the feedback state of the multiple transport blocks, the feedback resource The feedback state of the transmission block corresponding to the position is the NACK state, and if a plurality of the transmission blocks are all in the DTX state, the feedback information is the no feedback state;

In the case that the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transmission block groups, the transmission block group corresponding to the feedback resource position The feedback state of is an ACK state, and if there is no ACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the second method in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal separately obtains the feedback state identifiers fed back by each receiving terminal in an independent feedback channel.
The terminal according to claim 34, wherein the corresponding relationship comprises:

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the number of the multiple time slots is 2 or 4, the feedback status of the transport block corresponding to the feedback resource location is NACK State, if there is no NACK state among the feedback states of the multiple transport blocks, the feedback information is a non-feedback state;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the number of the multiple time slots is 4, and the number of transmission blocks in each cycle is 3, if the number of transmission blocks is 3 There is a NACK state in the feedback state, and the feedback state of the transport block corresponding to the feedback resource location is the NACK state. If there is no NACK state in the feedback state of the multiple transport blocks, the feedback information is the no feedback state ；

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, and the feedback state is the feedback state of two transport block groups, the feedback state of the transport block group corresponding to the feedback resource location is NACK State, if there is no NACK state in the feedback state of the two transport block groups, the feedback information is a non-feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, the sending terminal obtains the feedback state identifier fed back by each receiving terminal on the same feedback channel.
The terminal according to claim 34, wherein, in the case where the plurality of time slots are two and the feedback channel carries 2 bits of information, the correspondence relationship includes:

In the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback status of the transmission block corresponding to the feedback resource location is the ACK or NACK status. The feedback state of the block is DTX state, then the feedback information is no feedback state;

Wherein, when the method 2 in the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal uses an independent feedback channel to feed back the feedback status identifier;

In the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the feedback state of the transport block corresponding to the feedback resource location is the NACK state, if there is no feedback state of the multiple transport blocks NACK state, the feedback information is no feedback state;

Wherein, when the multicast mode is adopted between the receiving terminal and the sending terminal, each receiving terminal shares the same feedback channel to feed back the feedback information, and only feeds back the feedback information that has the NACK state in the feedback state.
The terminal according to claim 32 or 34, wherein, in the case that the unicast mode or the multicast mode is adopted between the receiving terminal and the sending terminal, the following steps are implemented when the processor executes the computer program :

When the feedback status identifier sent by at least one receiving terminal indicates that the transmission block needs to be retransmitted, detecting whether to send the transmission block to the receiving terminal;

In the case that the sending terminal sends the transmission block to the receiving terminal, retransmit the transmission block data to the at least one receiving terminal;

In the case where the feedback status identifier indicates that data retransmission of the transmission block is not required, or the sending terminal does not send the transmission block to the receiving terminal, data retransmission of the transmission block is not performed.
The terminal according to claim 32 or 34, wherein, in the case where the multicast mode is adopted between the receiving terminal and the sending terminal, the following steps are implemented when the processor executes the computer program:

In all the feedback resource locations where the feedback status identifier is obtained, there is at least one feedback status identifier sent by the receiving terminal, indicating that the transmission block data needs to be retransmitted, and the sending terminal sends the transmission block to the receiving terminal Next, retransmit the transport block data to all receiving terminals that receive the transport block.
The terminal according to claim 32 or 34, wherein the processor implements one of the following steps when executing the computer program:

In the case that the feedback status identifier is not obtained, all transmission blocks do not need to perform data retransmission;

When the first preset state identifier is obtained, data retransmission is performed on all transmission blocks.
The terminal according to claim 32, wherein the processor implements the following steps when executing the computer program:

In the case where the multiple time slots are 4, the maximum number of transmission blocks transmitted by the transmitting terminal in each cycle is set to 3.
A terminal, which is a receiving terminal, includes:

The first determining module is configured to determine the feedback status of the multiple transmission blocks according to the reception results of the transmission blocks on the multiple time slots when multiple time slots share the same feedback resource pool;

The first sending module is configured to select the feedback resource position mapped by the feedback channel from the feedback resource positions corresponding to the transmission blocks for which control information is successfully decoded in the multiple time slots, and send the information of the transmission block through the feedback channel. Feedback status identification;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
A terminal, which is a sending terminal, and includes:

The first obtaining module is used to obtain the feedback status identifier;

The second determining module is configured to determine whether to perform data retransmission for each transmission block according to the feedback status identifier and the feedback resource location where the feedback status identifier is acquired;

Wherein, the feedback resource location and the feedback state identifier together indicate whether the sending terminal needs to perform data retransmission for each transmission block.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the information feedback method according to any one of claims 1 to 10, or implements claims 11 to Steps of the information retransmission method described in any one of 21.