WO2021032018A1

WO2021032018A1 - Feedback information transmission method and apparatus

Info

Publication number: WO2021032018A1
Application number: PCT/CN2020/109322
Authority: WO
Inventors: 黄海宁; 黎超; 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2019-08-16
Filing date: 2020-08-14
Publication date: 2021-02-25
Also published as: CN112398597B; CN112398597A

Abstract

Provided are a feedback information transmission method and apparatus, wherein same relate to the field of communications, can effectively reduce the number of bits of feedback information, and can be applied to D2D or Internet of vehicles, such as V2X, or can be used in the field of intelligent driving, intelligent connected vehicles, etc. The method comprises: a first device receiving a plurality of transport blocks sent by a second device; the first device generating feedback information according to a first preset rule, the first preset rule comprising: generating, according to receiving results regarding a plurality of transport blocks, the feedback information by means of bundling, or generating the feedback information according to receiving results regarding some transport blocks in the plurality of transport blocks; and the first device sending the feedback information to the second device, wherein the feedback information is used for representing whether the first device correctly receives response information of the plurality of transport blocks.

Description

Method and device for transmitting feedback information

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on August 16, 2019, the application number is 201910760452.2, and the invention title is "a method and device for transmitting feedback information", the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of communication technology, and in particular to a method and device for transmitting feedback information.

Background technique

In a wireless communication system, hybrid automatic repeat request (HARQ) technology is usually used between the sender and receiver to improve the reliability of data transmission. HARQ is a hybrid method that combines forward error correction (FEC) and automatic repeat-request (ARQ). Not only can the codeword sent by the sender be checked for errors, it also has a certain error correction capability. Specifically, the sending end sends a transport block (TB) to the receiving end. If the receiving end successfully receives the TB and can decode it correctly, it sends back an acknowledgement (ACK) to the sending end; if the receiving end receives If it fails or cannot be decoded correctly, a negative acknowledgement (NACK) is fed back to the sender. After receiving the ACK from the receiving end, the sending end knows that the TB transmission is successful; after receiving the NACK from the receiving end, the sending end knows that the transmission of the TB has failed, and can also retransmit the TB to the receiving end.

The vehicle to everything (V2X) system supports broadcast, unicast and multicast. Among them, if the type of data sent is broadcast data, no feedback from the receiving end is required. If the data sent is unicast or multicast data, feedback from the receiving end is required, that is, HARQ feedback must be supported in unicast and multicast. In addition, HARQ information is carried using a physical layer sidelink feedback channel (PSFCH).

Currently, the new radio (NR) V2X system supports one-symbol sequence-based PSFCH format, and one symbol sequence-based PSFCH format can support 1-2 bits. In NR V2X, the PSFCH resource configuration period is N time slots, N=1/2/4. That is, there is one PSFCH resource every 1/2/4 time slot. When the HARQ information that needs to be transmitted exceeds the upper limit of 2 bits of the sequence-based PSFCH format, the receiving end cannot use the sequence-based PSFCH format to transmit more than 2 bits of HARQ information.

Summary of the invention

The embodiments of the present application provide a feedback information transmission method and device, which can reduce the number of bits of feedback information transmission, and further implement feedback using a sequence-based feedback channel.

In order to achieve the above objectives, this application adopts the following technical solutions:

In a first aspect, the present application provides a feedback information transmission method. The method may include: a first device receives multiple transmission blocks sent by a second device, the first device generates feedback information according to a first preset rule, and the first device sends The second device sends feedback information, where the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks. Wherein, the first preset rule includes: generating feedback information in a manner of bundling according to the reception results of multiple transmission blocks, or generating feedback information according to the reception results of some transmission blocks in the multiple transmission blocks.

In this way, by binding the receiving results of multiple transmission blocks to bundling to generate feedback information, or generating feedback information based on the receiving results of some of the multiple transmission blocks, the resources occupied by feedback information can be effectively reduced And the system can work effectively when only supporting the sequence-based feedback channel format, reducing the complexity of system design.

In a possible implementation manner, the length of the feedback information is a preset length. The feedback information is generated by bundling according to the reception results of multiple transmission blocks, including: generating feedback information by binding the reception results of all transmission blocks or bundling the reception results of some transmission blocks.

In this way, the preset length can be determined according to the upper limit of the number of bits that can be carried by the feedback resource or the format of the feedback channel used to transmit feedback information, and the result can be generated by binding all or part of the transmission block reception result. Feedback information, on the one hand, can reduce the size of the feedback resources used and improve the efficiency of spectrum utilization; on the other hand, it can reduce the format type of the feedback channel and reduce the complexity of system design. In addition, the method for selecting partial transmission blocks in the result of receiving the bound partial transmission blocks can be determined according to the priority/delay/reliability/quality of service requirements or scheduling sequence of the currently transmitted data block.

In a possible implementation manner, the multiple transmission blocks include a first transmission block and a second transmission block, and the feedback information includes the first feedback information and the second feedback information. Correspondingly, generating feedback information by binding the reception result of the partial transmission block includes: generating first feedback information according to the reception result of the first transmission block, and generating second feedback information according to the reception result of the second transmission block. Wherein, the number of the first transmission block or the second transmission block is one or more; when the number of the first transmission block or the second transmission block is multiple, the reception results of the multiple first transmission blocks are bound to generate The first feedback information or the reception results of multiple second transmission blocks are bound to generate the second feedback information.

In a possible implementation manner, the priority of the first transmission block is not lower than the priority of the second transmission block.

In a possible implementation manner, the scheduling sequence of the first transmission block is prior to the scheduling sequence of the second transmission block; wherein the scheduling sequence is the sequence in which the first device receives multiple transmission blocks.

In a possible implementation manner, the number of the first transmission block may be one. Specifically, the first transmission block is the first scheduled transmission block among at least one transmission block with the highest priority among multiple transmission blocks.

In a possible implementation manner, the number of first transmission blocks may be multiple. Specifically, the first transmission block is at least one transmission block with the highest priority among multiple transmission blocks.

In a possible implementation manner, the length of the feedback information is a preset length; some transmission blocks include at least one third transmission block. Correspondingly, generating feedback information according to the reception results of some of the multiple transmission blocks includes: determining the number of third transmission blocks according to a preset length; wherein one bit of the preset length corresponds to the reception of one third transmission block Result: The feedback information is generated according to the reception result of the above-mentioned number of third transmission blocks.

For example, the preset length can be determined according to the upper limit of the number of bits that can be carried by the feedback resource or the format of the feedback channel used to transmit feedback information, and the number of transmission blocks for generating feedback information can be determined, and then the priority of the transmitted data block can be determined. Information such as /delay/reliability/quality of service requirements or scheduling sequence determines which transmission block feedback information is generated, so that the feedback of transmission blocks with high priority/delay/reliability/quality of service requirements can be effectively guaranteed. At the same time, it also reduces the size of the feedback resources used, which further meets the communication needs and improves the communication performance.

In a possible implementation manner, the priority of the third transmission block is not lower than the priority of the fourth transmission block, and the fourth transmission block is a transmission block excluding the third transmission block from all transmission blocks received by the first device.

In a possible implementation manner, the scheduling sequence of the third transmission block is prior to the scheduling sequence of the fourth transmission block, and the fourth transmission block is a transmission block other than the third transmission block among all transmission blocks received by the first device.

In a possible implementation manner, the priority of part of the third transmission block is equal to the priority of part of the fourth transmission block, and the scheduling order of the part of the third transmission block is earlier than the scheduling order of the part of the fourth transmission block.

In a possible implementation, the first device sending feedback information to the second device includes: the first device uses the first feedback resource to send the feedback information to the second device, and the first feedback resource is: the latest transmission block received Corresponding feedback resources.

In a second aspect, this application provides a feedback information transmission method. The method may include: a second device sends multiple transmission blocks to the first device; the second device receives feedback information sent by the first device, and the feedback information is used to indicate Whether the first device correctly receives the response information of multiple transmission blocks; the feedback information is the feedback information generated by the first device according to the first preset rule, and the first preset rule includes: bundling according to the receiving result of the multiple transmission blocks The feedback information is generated in the manner of, or the feedback information is generated according to the reception result of some of the transmission blocks; the second device sends the transmission block that needs to be retransmitted to the first device.

In a possible implementation, the second device receiving the feedback information sent by the first device includes: the second device receives the feedback information according to a second preset rule; the second preset rule includes: according to the scheduling order, scheduling from the latest The feedback information corresponding to the transmission block of the transmission block is sequentially received.

In a possible implementation manner, if there is no feedback information at the received feedback resource, the transmission block corresponding to the received feedback resource is retransmitted.

In a third aspect, the present application provides a feedback information transmission method. The method may include: a first device receives multiple transmission blocks sent by a second device; the first device generates feedback information according to the reception results of the multiple transmission blocks; the feedback The information is used to indicate whether the first device correctly receives the response information of multiple transmission blocks. The first device determines the second feedback resource according to the second preset rule; the first device uses the second feedback resource to send feedback information to the second device.

In a possible implementation manner, the second preset rule is: the feedback resource corresponding to the transmission block with the highest priority is determined to be the second feedback resource; or, the feedback resource corresponding to the transmission block received first is determined to be the second feedback Resource; or, the largest feedback resource among the feedback resources corresponding to the received multiple transmission blocks is determined to be the second feedback resource; or, the smallest feedback resource among the feedback resources corresponding to the multiple received transmission blocks is determined to be the second feedback Resource; or, the feedback resource corresponding to the transmission block with the largest frequency domain resource index among the feedback resources corresponding to the received multiple transmission blocks is determined to be the second feedback resource; or, the feedback resource corresponding to the multiple received transmission blocks in the frequency domain The feedback resource corresponding to the transmission block with the smallest resource index is determined as the second feedback resource; or, the feedback resources corresponding to the multiple received transmission blocks are determined as the second feedback resource.

In this way, a variety of ways to determine feedback resources are defined, which provides more possibilities for system design.

In a fourth aspect, the present application provides a feedback information transmission method. The method may include: the second device sends multiple transmission blocks to the first device; the second device receives feedback information sent by the first device, and the feedback information is used to indicate Whether the first device correctly receives the response information of multiple transmission blocks; the second device sends the transmission block that needs to be retransmitted to the first device.

In a possible implementation manner, the number of multiple transmission blocks is less than or equal to a preset threshold, and the preset threshold is determined according to at least one of the following: the configuration period of the feedback resource set, the format of the feedback channel, and the size of the feedback resource. Among them, the feedback resource set is the PSFCH resource, which is a system-level resource subset that is periodically pre-configured in a resource set for sending feedback information. The resource set is the resource set for sending or receiving data, and the feedback resource set is the sending Or a collection of resources to receive feedback information. The device that sends data in the resource set receives feedback information in the feedback resource set, or correspondingly, the device that receives data in the resource set sends feedback information in the feedback resource set; the feedback resource is used by the first device The resource for sending feedback information, the feedback resource is a subset of the feedback resource set.

In this way, the second device determines the preset threshold according to multiple methods, and then controls the number of transmission blocks so that the first device does not have to concurrently send multiple PSFCHs in the same time slot, or use sequence-based PSFCH format to send more than 2 bits of HARQ information . The problem of increased PAPR is avoided, the performance of system operation is improved, and the complexity of system design is reduced.

In a possible implementation manner, the period during which the second device sends the transmission block is greater than or equal to the configuration period of the feedback resource set.

In this way, by controlling the transmission period of the transport block, the second device effectively avoids the need for the second device to send multiple PSFCHs in parallel in the same time slot, or use sequence-based PSFCH format to send more than 2 bits of feedback information to avoid concurrency The problems of power limitation and increased PAPR caused by multiple PSFCHs, and only the sequence-based PSFCH format is required, which reduces the complexity of system design.

In a fifth aspect, this application provides a feedback information transmission device, which includes a processing unit and a communication unit. The communication unit is configured to receive multiple transmission blocks sent by the second device. The processing unit is configured to generate feedback information according to a first preset rule. The first preset rule includes: generating feedback information in a manner of bundling according to the reception results of multiple transmission blocks, or according to partial transmission of multiple transmission blocks The reception result of the block generates feedback information. The communication unit is also used to send feedback information to the second device, where the feedback information is used to indicate whether the first device correctly receives the response information of multiple transmission blocks.

In a possible implementation manner, the length of the feedback information is a preset length; the processing unit is specifically configured to generate feedback information by binding the reception results of all transmission blocks or binding the reception results of some transmission blocks.

In a possible implementation manner, the multiple transmission blocks include a first transmission block and a second transmission block; the feedback information includes the first feedback information and the second feedback information; the processing unit is specifically configured to generate according to the reception result of the first transmission block The first feedback information, the second feedback information is generated according to the reception result of the second transmission block; where the number of the first transmission block or the second transmission block is one or more; when the number of the first transmission block or the second transmission block When there are multiple, the reception results of multiple first transmission blocks are bound to generate first feedback information or the reception results of multiple second transmission blocks are bound to generate second feedback information.

In a possible implementation manner, the first transmission block is the first scheduled transmission block among at least one transmission block with the highest priority among the multiple transmission blocks.

In a possible implementation manner, the first transmission block is at least one transmission block with the highest priority among multiple transmission blocks.

In a possible implementation manner, the length of the feedback information is a preset length; some transmission blocks include at least one third transmission block, and the processing unit is specifically configured to determine the number of third transmission blocks according to the preset length; where the preset One bit of the length corresponds to the reception result of one third transmission block; the feedback information is generated according to the reception result of the third transmission block of the above number.

In a possible implementation manner, the communication unit is specifically configured to send feedback information to the second device by the first device using the first feedback resource, and the first feedback resource is: the feedback resource corresponding to the transmission block received last.

In a sixth aspect, the present application provides a feedback information transmission device, which includes a communication unit. The communication unit is configured to send multiple transmission blocks to the first device; the communication unit is also configured to receive feedback information sent by the first device, where the feedback information is used to indicate whether the first device correctly receives response information for the multiple transmission blocks; The feedback information is the feedback information generated by the first device according to the first preset rule, and the first preset rule includes: generating feedback information according to the receiving results of multiple transmission blocks through bundling, or according to the information in the multiple transmission blocks Feedback information is generated from the reception result of part of the transmission block; the communication unit is also used for the second device to send the transmission block that needs to be retransmitted to the first device.

In a possible implementation manner, the communication unit is specifically configured to receive feedback information according to a second preset rule; the second preset rule includes: according to a scheduling sequence, sequentially receiving feedback information from the feedback resource corresponding to the latest scheduled transmission block .

In a possible implementation manner, if there is no feedback information at the received feedback resource, the communication unit retransmits the transmission block corresponding to the received feedback resource.

In a seventh aspect, the present application provides a feedback information transmission device, which includes a processing unit and a communication unit. The communication unit is configured to receive multiple transmission blocks sent by the second device; the processing unit is configured to generate feedback information according to the reception results of the multiple transmission blocks, and the feedback information is used to indicate whether the first device correctly receives the multiple transmission blocks. Response information; a processing unit, configured to determine the second feedback resource according to a second preset rule; the communication unit, further configured to use the second feedback resource to send feedback information to the second device.

In an eighth aspect, the present application provides a feedback information transmission device, which includes a processing unit and a communication unit. The communication unit is used to send multiple transmission blocks to the first device; the communication unit is used to receive feedback information sent by the first device, the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks; The unit is also used for the second device to send the transmission block that needs to be retransmitted to the first device.

In a possible implementation manner, the processing unit is further configured to determine that the number of multiple transmission blocks is less than or equal to a preset threshold, and the preset threshold is determined according to at least one of the following: the configuration period of the feedback resource set, the feedback channel Format, the size of the feedback resource. The feedback resource set is a pre-configured resource set, and the feedback resource is a resource used to send feedback information.

In a possible implementation manner, the processing unit is further configured to determine that the period for sending the transmission block is greater than or equal to the configuration period of the feedback resource set.

In a ninth aspect, the present application provides a device with a feedback information transmission device that implements the feedback information transmission method of any one of the foregoing first aspect, or the feedback information transmission method of any one of the second aspect, or the third aspect The function of the feedback information transmission method of any item, or the feedback information transmission method of any item of the fourth aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-mentioned functions.

In a tenth aspect, a device is provided, including: a processor; the processor is configured to couple with a memory and read an instruction in the memory, and then execute the feedback information transmission method according to any one of the foregoing first aspect according to the instruction, or, The feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

In an eleventh aspect, a device is provided, including: a processor and a memory; the memory is used to store computer-executable instructions, and when the feedback information transmission device is running, the processor executes the computer-executable instructions stored in the memory to make The feedback information transmission device executes the feedback information transmission method of any one of the foregoing first aspect, or the feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or, The feedback information transmission method of any one of the fourth aspect.

In a twelfth aspect, this application provides a device that includes a processor, a memory, a bus, and a communication interface. Among them, the memory is used to store one or more programs. The one or more programs include computer-executable instructions, and when the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes the feedback information transmission method of any one of the above-mentioned first aspects, or, The feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

In a thirteenth aspect, a circuit system is provided, the circuit system includes a processing circuit configured to execute the feedback information transmission method of any one of the above-mentioned first aspect, or the feedback information transmission method of any one of the second aspect Or, the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

In a fourteenth aspect, a chip is provided. The chip includes a processor, the processor is coupled to a memory, and the memory stores program instructions. When the program instructions stored in the memory are executed by the processor, the feedback information transmission of any one of the above-mentioned first aspects is realized. The method, or the feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

In a fifteenth aspect, this application provides a computer-readable storage medium with instructions stored in the computer-readable storage medium, and when a computer executes the instructions, the computer executes the feedback information transmission method of any one of the first aspects, or , The feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

In a sixteenth aspect, the present application provides a computer program product containing instructions that when the computer program product runs on a computer, the computer executes the feedback information transmission method of any one of the first aspects, or, The feedback information transmission method of any one of the second aspect, or the feedback information transmission method of any one of the third aspect, or the feedback information transmission method of any one of the fourth aspect.

Among them, the technical effects brought about by any of the design methods in the fifth aspect to the sixteenth aspect can be referred to the technical effects brought about by the different design methods in the first aspect to the fourth aspect, and will not be repeated here.

Description of the drawings

FIG. 1 is a schematic diagram of a communication network structure applied by a feedback information transmission method and device provided by an embodiment of this application;

2 is a schematic diagram of a communication network structure applied by a feedback information transmission method and device according to an embodiment of the application;

3 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application;

4 is a schematic diagram of a frame structure of feedback information transmission provided by an embodiment of the application;

FIG. 5 is a schematic diagram of a feedback information transmission method provided by an embodiment of this application;

FIG. 6 is a schematic diagram of yet another feedback information transmission method provided by an embodiment of this application;

FIG. 7 is a first structural diagram of a feedback information transmission device provided by an embodiment of this application;

FIG. 8 is a second structural schematic diagram of a feedback information transmission device provided by an embodiment of this application;

FIG. 9 is a third structural diagram of a feedback information transmission device provided by an embodiment of this application;

FIG. 10 is a fourth structural diagram of a feedback information transmission device provided by an embodiment of this application;

FIG. 11 is a fifth structural diagram of a feedback information transmission device provided by an embodiment of this application.

detailed description

The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations.

The terms "first" and "second" in the description of the application and the drawings are used to distinguish different objects, or to distinguish different processing of the same object, rather than describing a specific order of objects.

In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units that are not listed, or optionally also Including other steps or units inherent to these processes, methods, products or equipment.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present related concepts in a specific manner.

In the description of this application, unless otherwise specified, the meaning of "plurality" means two or more.

The method provided in the embodiments of this application can be used to support device-to-device (D2D) communication, V2X communication, machine type communications (MTC), machine-to-machine (M2M) communication, and car networking communication , Any communication system such as communication between network equipment and terminal equipment, the communication system may be a third generation partnership project (3rd generation partnership project, 3GPP) communication system, for example, the LTE system may also be the first The 5th generation (5G) mobile communication system, NR system, and other next-generation communication systems can also be non-3GPP communication systems without limitation. The following only uses the communication system shown in FIG. 1 as an example to describe the method provided in the embodiment of the present application. The communication system includes an access network device and one or more terminal devices (for example, terminal 1 and terminal 2 in FIG. 1) that communicate with the access network device. It may also include a core network (not shown in FIG. 1), etc. The terminals may communicate side-by-side through the PC5 interface, and the communication link between the terminals is called a sidelink (SL). The Uu link can be used to communicate between the access network equipment and the terminal.

Among them, the access network device involved in the embodiment of the present application is a device deployed on a wireless access network to provide wireless communication functions. Optionally, access network equipment may refer to equipment that communicates with wireless terminals through one or more cells on the air interface of the access network. Among them, the device that realizes the function of the access network equipment may be the access network equipment or It is a device that supports the access network equipment to achieve this function (such as the chip system in the access network equipment). Optionally, the access network device can perform attribute management on the air interface. The base station equipment can also coordinate the attribute management of the air interface. The access network equipment includes various forms of macro base stations, micro base stations (also called small stations), relay equipment such as relay stations or relay equipment chips, transmission reception points (TRP), and evolved network nodes (evolved Node B, eNB), next-generation network node (g Node B, gNB), evolved Node B (ng-evolved Node B, ng-eNB) connected to the next-generation core network, etc. Or, in a distributed base station scenario, the access network equipment can be a baseband unit (BBU) and a remote radio unit (RRU), in the cloud radio access Netowrk, CRAN In the scenario, the access network equipment can be a baseband pool (BBU pool) and RRU.

Optionally, the terminal involved in the embodiment of the present application may be a wireless terminal or a wired terminal. Including but not limited to in-vehicle devices, wearable devices, computing devices, chips built into computing devices, or other processing devices connected to wireless modems; it can also include cellular phones, personal communication services (PCS) phones , Cordless phones, session initiation protocol (SIP) phones, smart phones (smart phones), personal digital assistants (personal digital assistant, PDA) computers, tablet computers, laptop computers (laptop computers), wireless modems (modem), handheld device (handheld), wireless local loop (wireless local loop, WLL) station. The wireless terminal can also be a subscriber unit (subscriber unit, SU), subscriber station (subscriber station, SS), mobile station (mobile station, MB), mobile station (mobile), remote station (remote station, RS), remote terminal ( remote terminal (RT), user terminal (UT), terminal equipment (user device, UD), user equipment (UE), wireless data card, subscriber unit (subscriber unit), machine type communication (machine type) communication, MTC) terminal, terminal device (terminal device), customer premise equipment (CPE), access terminal (access terminal, AT), access point (access Point, AP), user agent ( user agent, UA), etc. In the embodiments of the present application, the device that implements the function of the terminal may be a terminal, or a device that supports the terminal to implement the function (such as a chip system in the terminal). For ease of description, in this application, the devices mentioned above are collectively referred to as terminals.

In addition, the aforementioned terminal 1 and terminal 2 can also communicate directly on a sidelink (SL), and the terminal device can be a device in a vehicle to everything (V2X) system as shown in Figure 2. Or it can also be a device in a device-to-device (D2D) system, a device in a road semi-automatic lane toll system (manual toll collection system, MTC), etc. Among them, V2X communication can include, for example, vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to network (V2N) communication, and vehicle to pedestrian Vehicle to pedestrian (V2P) communication, etc., can also be other forms of direct communication between terminal devices, such as pedestrian to pedestrian (P2P) communication.

It should be noted that the resource pool used for direct communication on the SL can be the resource pool configured by the network device, such as the resource pool used when the terminal 1 and terminal 2 are connected to the air interface of the access network device normally, or it can be The resource pools pre-configured in the terminal 1 and the terminal 2, for example, the resource pool that the equipment manufacturer configures in the terminal device according to the agreement before the terminal device leaves the factory.

In addition, in addition to the side link SL, the direct communication between terminal devices can also use other forms or other names of wireless connections, such as future wireless communication systems, such as 6G systems, and direct communication between terminal devices. Wireless connection is not limited in this application.

The feedback information transmission method provided by the embodiments of this application is applied in the communication process between two devices. It can be the communication between the network device and the terminal device, or the communication between the terminal device and the terminal device, or It is the communication between network equipment and network equipment. The terminal equipment and the network equipment can communicate through the Uu port link. Among them, the Uu port link can be divided into uplink (UL) and downlink (DL) according to the direction of the data transmitted on it. The UL can transmit data sent from terminal equipment to network equipment, DL It can transmit data from network equipment to terminal equipment. Among them, the network device may be an access network device or the like.

Optionally, the terminal and the access network device in the embodiment of the present application may be implemented by different devices. For example, the terminal and the access network device in the embodiment of the present application can be implemented by the communication device in FIG. 3. FIG. 3 shows a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application. The communication device 300 includes at least one processor 301, a communication line 302, a memory 303, and at least one communication interface 304. The memory 303 may also be included in the processor 301.

The processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.

The communication line 302 may include a path to transmit information between the aforementioned components.

The communication interface 304 is used to communicate with other devices. In the embodiments of the present application, the communication interface may be a module, a circuit, a bus, an interface, a transceiver, or other device that can realize a communication function, and is used to communicate with other devices. Optionally, when the communication interface is a transceiver, the transceiver can be an independently set transmitter, which can be used to send information to other devices, and the transceiver can also be an independently set receiver for sending information from other devices. The device receives information. The transceiver may also be a component that integrates the functions of sending and receiving information. The embodiment of the present application does not limit the specific implementation of the transceiver.

The memory 303 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can exist independently and is connected to the processor through the communication line 302. The memory can also be integrated with the processor.

The memory 303 is used to store computer-executed instructions for implementing the solution of the present application, and the processor 301 controls the execution. The processor 301 is configured to execute computer-executable instructions stored in the memory 303, so as to implement the feedback information transmission method provided in the following embodiments of the present application.

Optionally, the computer execution instructions in the embodiments of the present application may also be referred to as application program codes, instructions, computer programs or other names, which are not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.

In a specific implementation, as an embodiment, the communication device 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

In a specific implementation, as an embodiment, the communication device 300 may further include an output device 305 and an input device 306. The output device 305 communicates with the processor 301 and can display information in a variety of ways. For example, the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 306 communicates with the processor 301 and can receive user input in a variety of ways. For example, the input device 306 may be a mouse, a keyboard, a touch screen device, or a sensor device.

The aforementioned communication device 300 may be a general-purpose device or a special-purpose device, and the embodiment of the present application does not limit the type of the communication device 300. The terminal or the access network device may be a device having a structure similar to that of FIG. 3.

For ease of understanding, the technical terms involved in the embodiments of this application are introduced:

(1) Feedback information:

It is used to indicate whether the receiving end correctly receives the response information of the transmission block sent by the sending end. In the embodiments of this application, the feedback information mainly refers to HARQ information. The receiving end generates 1-bit HARQ information every time it receives 1 transport block (TB), and the receiving end sends the 1-bit HARQ information to the sending end, indicating whether the TB sent by the sending end is correctly received by the receiving end. In addition, if the sending end determines that the receiving end has not received the TB correctly, it can retransmit the TB to the receiving end. The retransmitted TB adds some redundant bits to the original data and sends it to the receiving end. If the receiving end still fails to decode successfully, retransmission is performed again. As the number of retransmissions increases, redundant bits continue to increase and the channel coding rate continues to decrease, so that the receiving end can obtain better decoding results.

For example, the sending end sends a TB to the receiving end. If the receiving end receives the TB correctly, it will feed back a 1-bit ACK to the sending end, indicating that the receiving end has received the TB correctly; if the receiving end has not received the TB correctly, it will The sending end feeds back a 1-bit NACK, indicating that the receiving end has not received the TB correctly. After receiving the NACK from the receiving end, the sending end can also retransmit the TB to the receiving end. Wherein, correct reception means that the receiving end has received the TB sent by the sending end and can successfully decode the TB. If the receiving end loses the TB or receives the TB but the decoding fails, it means that the receiving end failed to receive the TB correctly.

It should be noted that the 1-bit NACK or 1-bit ACK in the embodiment of the present application may be referred to as HARQ information. For example, ACK is "1" and NACK is "0".

(2) Physical layer sidelink feedback channel (PSFCH), physical layer sidelink control channel (PSCCH), physical layer sidelink shared channel (physical sidelink shared channel) , PSSCH):

PSCCH is a control channel for side-line communication between terminals, used to transmit control signaling.

PSSCH is a data channel for side-line communication between terminals and is used to transmit data.

PSFCH is a channel for feeding back HARQ information between terminals, and is used to transmit feedback information.

(3) Sequence-based PSFCH:

NR V2X supports a sequence-based PSFCH format using 1 symbol. And take sequence-based PUCCH format 0 as the starting point for reference. Sequence-based PUCCH format 0 can carry 1-2 bits, among which, 1-bit ACK/NACK is distinguished by different sequence cyclic shifts. For example, a sequence cyclic shift of 0 means NACK, and sequence cyclic shift 6 means ACK. 2-bit ACK/NACK is distinguished by different sequence cyclic shifts. For example, a sequence cyclic shift of 0 means {NACK, NACK}, and a sequence cyclic shift of 3 means {NACK, ACK}, sequence cyclic shift A displacement of 6 means {ACK, ACK}, and a sequence cyclic displacement of 9 means {ACK, NACK}.

(4) Feedback resources:

In the embodiment of this application, the feedback resource is the time-frequency resource used for sending the feedback information, and the feedback resource is a subset of the pre-configured PSFCH resource. Among them, the PSFCH resource is the feedback resource set. If the feedback information is HARQ information, the time-frequency resources occupied by the transmission of HARQ information are feedback resources. Feedback resources include time domain resources and frequency domain resources. Time domain resources refer to symbols used to transmit PSFCH, and frequency domain resources refer to subchannels occupied by PSFCH transmission. In the embodiment of this application, the time slot for transmitting the PSFCH is described as a PSFCH time slot. PSFCH resources are generally pre-configured in the receiving device according to a certain period.

In a possible implementation, there is an implicit association between the PSFCH time slot and the time slot for transmitting the PSCCH/PSSCH. For example, a fixed time interval K is used between PSSCH and PSFCH, and K represents the processing capability of the terminal, that is, the time interval K from receiving the PSSCH to generating HARQ information by the terminal does not exceed the time interval K. For example, if the terminal sends the PSSCH in time slot n, the terminal may send the PSFCH in the first time slot with PSFCH resources after time slot n+K or time slot n+K. Exemplarily, assuming that the time interval K=2 between PSCCH and PSFCH, and assuming that PSSCH is transmitted in time slot n, the terminal can transmit in the first time slot where PSFCH resources exist among time slots n+2, n+3... PSFCH.

Exemplarily, referring to FIG. 4, it is assumed that one PSFCH resource is configured every 4 time slots, that is, N=4, and time interval K=1. The sending end (device 2) sends TB1 on time slot 3 (n=3), and time slot 4 (n+K=3+1=4) is the earliest time slot that can feed back the PSFCH. However, there is no PSFCH resource available in slot 4, so feedback information cannot be sent in slot 4. The first time slot with PSFCH resources in time slot n+K or later is time slot 7. Then, the receiving end (device 1) can send feedback information corresponding to TB1 on time slot 7.

Further, when the sender sends a transmission block, time domain resources and frequency domain resources are occupied respectively. Exemplarily, referring to Figure 4, the sender (device 2) sends a transmission block (TB1) to the receiver (device 1), the time domain resource occupied is time slot 3, and the frequency domain resource is subchannel 2. Then, In a possible implementation, when the receiving end sends feedback information to the sending end, it will send it on subchannel 2 of time slot 7. That is, each transmission block sent by the sending end will be associated with a corresponding feedback resource time. Frequency location.

Similarly, referring to FIG. 4, there are no PSFCH resources in time slot 5 and time slot 6, and PSFCH resources in time slot 7. Then, the transmitting end sends the transport block TB2 to the receiving end on subchannel 1 of time slot 4. Time slot 5 is the earliest time slot in which the PSFCH can be fed back but there is no PSFCH resource available, and the receiving end can use subchannel 1 of time slot 7. Send the feedback information corresponding to TB2; the sender sends the transport block TB3 to the receiver on subchannel 3 of time slot 5. Time slot 6 is the earliest time slot in which PSFCH can be fed back but no PSFCH resources are available. The feedback information corresponding to TB3 is sent on subchannel 3 of slot 7; the sender sends transmission block TB4 to the receiver on subchannel 3 of slot 6, and there is PSFCH resource in slot 7, and the receiver can use subchannel 3 of slot 7 Send feedback information corresponding to TB4. It can be seen that time slot 7 is the first time slot in which PSFCH resources exist in time slot n+K or after TB1-TB4 is sent. Then, the feedback information generated corresponding to TB1-TB4 needs to be sent in time slot 7. However, since the time slots of the feedback PSFCH corresponding to multiple transmission blocks are the same time slot, that is, the receiving end needs to send multiple PSFCHs to the transmitting end in the same time slot. At this time, if multiple feedback channels are sent in parallel, it will cause the problem of power limitation and affect the transmission quality. If multiple feedback information is multiplexed together for feedback, it will cause the problem that the number of feedback information bits is greater than the upper limit of the sequence-based PSFCH bearer, resulting in failure to send feedback information. Therefore, in response to the above-mentioned problems, embodiments of the present application provide a feedback information transmission method and device.

An embodiment of the present application provides a feedback information transmission method, including feedback information sending and feedback information receiving. In the embodiments of the present application, the receiving end is the first device, the sending end is the second device, the first device generates and sends feedback information, and the second device receives and parses the feedback information. The first device and the second device may be terminal devices, or components of terminal devices (such as chip systems of terminal devices), or access network devices, or components of access network devices (such as chip systems), or Other equipment with communication function. The receiving end supports HARQ software and hardware processing capabilities, that is, various HARQ capabilities referred to in the prior art.

In the embodiment of this application, the first device needs to feed back HARQ information of multiple (more than two) transport blocks in a time slot where PSFCH resources exist as an example for description. At this time, if the information feedback in the prior art is adopted The generation method will cause the problem that the sequence-based PSFCH cannot be used to send feedback information.

As shown in FIG. 5, the feedback information transmission method provided in the embodiment of the present application may include S101-S104:

S101. The first device receives multiple transmission blocks sent by the second device.

After the first device receives the multiple transmission blocks sent by the second device, it will decode the multiple received transmission blocks. Further, the first device generates feedback information according to the decoding result to reflect the situation that the first device receives the transport block.

S102. The first device generates feedback information according to a first preset rule.

The first device generates feedback information according to the reception result of the transmission block, and the feedback information is whether the first device correctly receives the acknowledgement information (ACK/NACK) of the multiple transmission blocks. After the first device sends the feedback information to the second device, the second device can learn the reception status of the transmission block sent by the second device according to the feedback information, and then determine whether the transmission block needs to be retransmitted and which transmission blocks need to be retransmitted .

Wherein, the first preset rule includes: generating feedback information in a bundling manner according to the reception results of multiple transmission blocks, or generating feedback information according to the reception results of part of the multiple transmission blocks.

In addition, in order to meet the limitation of the size of the feedback resource or the number of bits carried in the sequence-based PSFCH format, the length of the feedback information needs to be a preset length, and the number of bits of the preset length is less than or equal to the upper limit of the number of carried bits of the sequence-based PSFCH. At present, the NR V2X system supports a sequence-based PSFCH format of one symbol and can support 1-2 bits. Therefore, the aforementioned preset length in the NR V2X system is 1 bit or 2 bits. Of course, when the bit value that the subsequent PSFCH format can support changes, the preset length will also change.

Further, generating the feedback information by binding means that the first device combines the reception results corresponding to each transmission block in the transmission blocks that are determined to be bound and performs a logical AND "AND" operation to generate the final feedback. information. Exemplarily, referring to Figure 4, the first device receives the four transmission blocks sent by the second device. Assuming that TB1 is successfully received, TB2 is successfully received, TB3 is received successfully, and TB4 is received failed, then the first device passes Among them, the receiving results of TB1 and TB2 are bound to generate feedback information, and the receiving results corresponding to TB1 and TB2 are logically ANDed. At this time, the result is received successfully, so the final feedback information corresponding to TB1 and TB2 is ACK. Corresponds to 1 bit "1". If the reception results of TB3 and TB4 are bound to generate feedback information, the reception results corresponding to TB3 and TB4 are logically ANDed, and the result is reception failure, so the final feedback information corresponding to TB3 and TB4 is NACK, corresponding to 1 bit "0".

In a possible implementation manner, generating feedback information in a binding manner according to the reception results of multiple transmission blocks includes: generating feedback information by binding the reception results of all transmission blocks or binding the reception results of some transmission blocks.

Optionally, the feedback information is generated by binding the reception results of all transmission blocks. In this implementation, the first device combines all the reception results of the received transmission blocks to perform a logical AND "AND" operation. Only when the reception results of all received transmission blocks are ACKs can the final feedback information be generated. Is ACK. If the reception result of any transport block is NACK, the final feedback information generated is NACK. Exemplarily, referring to FIG. 4, the first device (device 1) receives the 4 transmission blocks scheduled by the second device (device 2) in chronological order from time slot 3 to time slot 6, TB1, TB2, TB3 and TB4. Then, at this time, only the receiving results of the 4 transport blocks are ACKs, and the final feedback information is ACK; the receiving results of any transport block is NACK, and the final feedback information is all NACK.

In the foregoing implementation manner, the first device generates a piece of feedback information, and the feedback information is only an ACK or NACK, that is, the length of the feedback information is 1 bit, and the sequence-based PSFCH can be used for feedback.

Optionally, the feedback information is generated by binding the reception result of the partial transmission block. Exemplarily, the feedback information that can be carried according to the upper limit of 2 bits of the feedback resource or using the sequence-based PSFCH format is at most 2 bits. In order to generate 2-bit feedback information, the first device may divide the received multiple transmission blocks into two parts. That is, multiple transmission blocks need to be divided into a first transmission block and a second transmission block. Then, the first device generates first feedback information according to the reception result of the first transmission block, and generates second feedback according to the reception result of the second transmission block information. Wherein, the number of the first transmission block or the second transmission block is one or more. When the number of the first transmission block or the second transmission block is multiple, the reception results of multiple transmission blocks are bound (the ACK/NACK of multiple transmission blocks is a logical AND operation) to generate the first feedback Information or second feedback information. When the number of the first transmission block is one, the reception result of the single first transmission block can correspondingly generate the first feedback information. When the number of the second transmission block is one, the reception result of the single second transmission block is The second feedback information can be generated correspondingly.

In the foregoing implementation manner, the first device generates a piece of feedback information, the feedback information includes two parts, each part is an ACK or a NACK, that is, the length of the feedback information is 2 bits, and the sequence-based PSFCH can be used for feedback.

Wherein, the first transmission block and the second transmission block may be determined according to the priority or scheduling sequence of the received transmission block. In one implementation, the transmission block with the highest priority is a group, and the remaining transmission blocks are a group. The determined priority of the first transmission block is higher than the priority of the second transmission block, that is, the priority is the lowest. The priority of the first transmission block is higher than the priority of the second transmission block with the highest priority. In another implementation manner, it is determined that the first scheduled transmission block among the at least one transmission block with the highest priority among the received transmission blocks is the first transmission block, and the remaining transmission blocks are the second transmission block. In another implementation manner, it is determined that the transmission block with a higher priority is the first transmission block, and the remaining transmission blocks are the second transmission blocks. Wherein, the priority of the partial transmission block in the first transmission block is equal to the priority of the partial transmission block in the second transmission block, and the scheduling sequence of the partial transmission block in the first transmission block is earlier than the partial transmission in the second transmission block The scheduling order of the blocks. In another implementation, the transmission block with the first scheduling sequence is a group, and the remaining transmission blocks are a group. It is determined that the scheduling sequence of the first transmission block is earlier than the scheduling sequence of the second transmission block, that is, the latest scheduling The scheduling sequence of the first transmission block is earlier than the scheduling sequence of the earliest scheduled second transmission block.

Exemplarily, the first transmission block and the second transmission block may be determined according to the following scheme. Referring to Fig. 4, for the four transmission blocks transmitted, it is assumed that the scheduling order is TB1>TB2>TB3>TB4.

Solution 1: Determine the first transmission block and the second transmission block according to the priority of the received transmission block, and the priority of the first transmission block is not lower than the priority of the second transmission block.

Optionally, at least one transmission block with the highest priority among the multiple received transmission blocks is determined as the first transmission block, the remaining transmission blocks are determined as the second transmission block, and the priority of all the first transmission blocks is higher than that of all the first transmission blocks. Two transmission blocks.

Exemplarily, referring to FIG. 4, it is assumed that the priority of the received four transport blocks is TB1=TB2>TB4>TB3. Then, the transmission block with the highest priority has two TB1 and TB2, so TB1 and TB2 are determined as the first transmission block, and TB3 and TB4 are determined as the second transmission block. The first device generates first feedback information by binding the reception results of TB1 and TB2, and generates second feedback information by binding the reception results of TB3 and TB4. Then the generated feedback information is shown in Table 1A below.

Table 1A

Refer to Table 1A, ACK is "1" and NACK is "0". In this scheme, 4 kinds of HARQ information will be generated, "00", "01", "10" and "11". When the first device does not correctly receive any one of TB1 and TB2, the bound first feedback information corresponding to TB1 and TB2 is 0. When the first device does not correctly receive any one of TB3 and TB4, TB3 and The bound second feedback information corresponding to TB4 is 0, therefore, the HARQ information sent by the first device to the second device is "00". When the first device does not correctly receive any one of TB1 and TB2, the first feedback information after binding corresponding to TB1 and TB2 is 0. When the first device correctly receives TB3 and TB4, the corresponding binding of TB3 and TB4 The latter second feedback information is 1, therefore, the HARQ information sent by the first device to the second device is "01". When the first device correctly receives TB1 and TB2, the bound first feedback information corresponding to TB1 and TB2 is 1. When the first device does not correctly receive any of TB3 and TB4, the corresponding binding of TB3 and TB4 The second feedback information afterwards is 0, therefore, the HARQ information sent by the first device to the second device is "10". When the first device correctly receives TB1 and TB2, the bound first feedback information corresponding to TB1 and TB2 is 1. When the first device correctly receives TB3 and TB4, the bound second feedback information corresponding to TB3 and TB4 The information is 1, therefore, the HARQ information sent by the first device to the second device is "11".

It should be noted that, when the second device sends a transmission block to the first device, the second device as the sending end can learn the priority and scheduling order of the multiple transmission blocks sent. After the first device receives the transmission block, it can obtain the information for analyzing the transmission block according to the sidelink control information (SCI) of the transmission block. For example, it can learn the priority of the received transmission block. In a possible implementation manner, the priority of the transport block is determined according to the priority and/or the quality of service (QoS) field included in the control signaling for scheduling the transport block. Or the receiving end selects other methods to determine the priority of the received transmission block, and the method of determining the priority of the received transmission block is not specifically limited in the embodiment of the present application.

In addition, during the transmission process, the transmission block may be lost. At this time, the receiving end cannot receive the SCI sent by the sending end, and therefore cannot receive the transmission block scheduled by the SCI. Therefore, a sidelink assignment indicator (SAI) field is added to the SCI to count the SCI. For example, the sending end sends four transmission blocks TB1-TB4 to the receiving end, and the corresponding SAI fields in the SCI are 1, 2, 3, 4 (assuming that the SAI field is 2 bits, which can indicate 4 states). Assuming that the receiving end loses the TB2 sent by the sending end (the SAI field in the SCI is 2), the receiving end knows that it has lost a TB after receiving TB1 (SAI=1) and TB3 (SAI=3). The HARQ information corresponding to TB2 is NACK. However, since the receiving end cannot know the total number of transmission blocks sent by the sending end, when the last continuous transmission block or multiple transmission blocks sent are lost, the receiving end will consider the last received transmission block as the last one sent by the sending end Transmission block. In fact, the receiving end cannot know that the transmission block sent by the subsequent sending end has been lost.

Exemplarily, referring to Figure 4, the sender has sent 4 transmission blocks. Assuming that the receiver has only received three transmission blocks TB1-TB3, TB4 is lost, that is, the last scheduled TB. At this time, the receiver can The scheduling sequence of the received transport blocks is known, but the SCI of TB4 is missed. Then, the receiving end will think that the received TB3 is the last transmission block, so it will only send feedback information corresponding to the three received transmission blocks.

Referring to Table 1A, assuming that TB4 is not lost, when at least one of TB1/2/3 is lost, the first device can learn that the transmission block is lost. When a certain transmission block is lost, since the SCI of the lost transmission block cannot be known, the priority of the lost transmission block cannot be determined. Then, the priority order judged by the receiving end is not the same as that of the sending end, which causes confusion between the two parties. For example, referring to Figure 4, the sender sends four transport blocks TB1, TB2, TB3, and TB4 to the receiver, and the receiver loses TB2. At this time, the receiver (the first device) cannot know the priority of the lost transport block. The priority of the received transmission block is sorted. At this time, if the receiving end only sorts the priority of the received transmission block as TB1>TB4>TB3. Therefore, when the transmission block is lost, the sending and receiving dual transmissions have different perceptions of the priority ordering of the transmission blocks. For example, at this time, the receiving end considers that the number of transmission blocks with the highest priority is 1, namely TB1, and will transfer this transmission block. It is determined as the first transmission block and then the first feedback information is determined. In fact, the transmission blocks with the highest priority are 2 TB1 and TB2 (the priority order is TB1=TB2>TB4>TB3), which should be based on the reception of TB1 and TB2 The result is bound to generate first feedback information. Therefore, when the transmission block is lost, the communication between the two parties will be confused. Therefore, in Table 1A, when any one of TB1, TB2, and TB3 is lost, the feedback information "00" will be generated, that is, the transmission block has not been received correctly this time. That is to say, when the receiving end finds that it has lost part of the transmission block, in the scheme of judging the first transmission block and the second transmission block by priority, it needs to feed back "00" to the sender to inform the sender of the failure To be able to receive correctly, all the transmitted transmission blocks need to be retransmitted.

Optionally: the transmission block with the highest priority and first scheduled among the multiple received transmission blocks is determined as the first transmission block, and the remaining transmission blocks are determined as the second transmission block.

Exemplarily, referring to Fig. 4, suppose that the priority of the four received transmission blocks is TB2=TB4>TB3>TB1, the scheduling sequence is TB1>TB2>TB3>TB4, and the receiving end receives TB4. Then, there are two transmission blocks with the highest priority, TB2 and TB4. At this time, according to the scheduling order TB2>TB4, TB2 is determined as the first transmission block, that is, TB2 is the first and highest priority among the multiple transmission blocks received. The scheduled transmission blocks, TB1, TB3, and TB4, are determined as the second transmission block. The first device generates first feedback information according to the reception result of TB2, and generates second feedback information by binding the reception results of TB1, TB3, and TB4. Then the generated feedback information is shown in Table 2A below.

Table 2A

Refer to Table 2A, ACK is "1" and NACK is "0". In this scheme, 4 kinds of HARQ information will be generated, "00", "01", "10" and "11". When the first device does not correctly receive TB2, its corresponding first feedback information is 0. When the first device does not correctly receive any of TB1, TB3, and TB4, the bound first device corresponding to TB1, 3, and 4 The second feedback information is 0, so the HARQ information sent by the first device to the second device is "00". When the first device does not receive TB2 correctly, the corresponding first feedback information is 0. When the first device correctly receives TB1, TB3, and TB4, the bound second feedback information corresponding to TB1, 3, and 4 is 1. , Therefore, the HARQ information sent by the first device to the second device is "01". When the first device correctly receives TB2, its corresponding first feedback information is 1. When the first device does not correctly receive any one of TB1, TB3, and TB4, TB1, 3, and 4 correspond to the bound second The feedback information is 0, therefore, the HARQ information sent by the first device to the second device is "10". When the first device correctly receives TB2, the corresponding first feedback information is 1. When the first device correctly receives TB1, TB3, and TB4, the bound second feedback information corresponding to TB1, 3, and 4 is 1. Therefore, the HARQ information sent by the first device to the second device is "11".

Optionally, it is determined that the transmission block with a higher priority is the first transmission block, and the remaining transmission blocks are the second transmission block. Wherein, the priority of the partial transmission block in the first transmission block is equal to the priority of the partial transmission block in the second transmission block, and the scheduling sequence of the partial transmission block in the first transmission block is earlier than the partial transmission in the second transmission block The scheduling order of the blocks.

Exemplarily, referring to Fig. 4, suppose the sending end sends 4 transmission blocks, the priority is TB3>TB1=TB4>TB2, the scheduling order is TB1>TB2>TB3>TB4, and the receiving end receives TB4. At this time, it is stipulated that the two transmission blocks with higher priority are determined as the first transmission block, and the remaining transmission blocks are determined as the second transmission block. Since the scheduling sequence of TB1 is earlier than TB4, the first transmission block is TB3 and TB1, and the second transmission block is TB4 and TB2. The first device generates first feedback information by binding the reception results of TB1 and TB3, and generates second feedback information by binding the reception results of TB2 and TB4. Then the generated feedback information is shown in Table 3A below.

Table 3A

Solution 2: A part of the transmission blocks scheduled earlier in the received transmission blocks is determined to be the first transmission block, and the remaining transmission blocks are determined to be the second transmission block.

Optionally, the first scheduled transmission block among the received transmission blocks is the first transmission block, and the remaining transmission blocks are the second transmission block. Then, the reception result of the first scheduled transmission block is the first feedback information, and the first device generates the second feedback information by binding the reception results of the remaining transmission blocks.

Exemplarily, referring to FIG. 4, the scheduling sequence is TB1>TB2>TB3>TB4, then the first scheduled TB1 is the first transmission block, and TB2, TB3, and TB4 are the second transmission blocks. Then the first device generates the first feedback information according to the reception result of TB1, and generates the second feedback information by binding the reception results of TB2, TB3, and TB4. That is, as long as one of the reception results of TB2, TB3, and TB4 is NACK, the second feedback information The information is NACK. Then the generated feedback information is shown in Table 4A below.

Table 4A

HARQ信息对应的反馈状态Feedback status corresponding to HARQ information	HARQHARQ
TB1 NACK+TB2/3/4中至少一个NACKAt least one NACK in TB1 NACK+TB2/3/4	0000
TB1NACK+TB2/3/4均ACKTB1NACK+TB2/3/4 both ACK	0101
TB1ACK+TB2/3/4中至少一个NACKAt least one NACK in TB1ACK+TB2/3/4	1010
TB1ACK+TB2/3/4均ACKTB1ACK+TB2/3/4 both ACK	1111

Optionally, multiple transmission blocks scheduled earlier in the received transmission blocks are determined to be the first transmission block, and the remaining transmission blocks are determined to be the second transmission block. Then, the first device generates the first feedback information by binding the reception results of the first scheduled multiple transmission blocks, and generates the second feedback information by binding the reception results of the remaining transmission blocks.

Exemplarily, the two transmission blocks scheduled earlier in the received transmission blocks are the first transmission blocks, and the remaining transmission blocks are the second transmission blocks. Referring to Fig. 4, the scheduling sequence TB1>TB2>TB3>TB4, TB1 and TB2 are determined as the first transmission block, and TB3 and TB4 are determined as the second transmission block. Then the first device generates the first feedback information by binding the reception results of TB1 and TB2, that is, as long as one of the reception results of TB1 and TB2 is a failure, the first feedback information is a failure, and the first device receives by binding TB3 and TB4 As a result, the second feedback information is generated, that is, as long as one of the reception results of TB3 and TB4 is a failure, the second feedback information is a failure. Then the generated feedback information is shown in Table 5A below.

Table 5A

HARQ信息对应的反馈状态Feedback status corresponding to HARQ information	HARQHARQ
TB1/2至少一个NACK+TB3/4中至少一个NACKAt least one NACK in TB1/2+At least one NACK in TB3/4	0000
TB1/2至少一个NACK+TB3/4均ACKTB1/2 at least one NACK+TB3/4 all ACK	0101
TB1/2ACK+TB3/4中至少一个NACKAt least one NACK in TB1/2ACK+TB3/4	1010
TB1/2ACK+TB3/4均ACKTB1/2ACK+TB3/4 both ACK	1111

It should be noted that in the above example, one or two transmission blocks scheduled earlier are determined as the first transmission block as an example for description. It can be understood that multiple transmission blocks scheduled earlier are determined as the first transmission block. Transmission block, the number of the multiple transmission blocks can be determined according to actual scenarios, for example, it can be 3, 4 or more, which is not specifically limited in the embodiment of the present application.

In a possible implementation manner, the feedback information is generated according to the reception result of some of the multiple transmission blocks received. In order to satisfy that the length of the final feedback information is a preset length, that is, the finally generated feedback information can be sent using a sequence-based PSFCH or limited by the size of the feedback resource. Therefore, the number of third transmission blocks can be determined according to the preset length. The third transmission block generates feedback information, and the rest of the transmission blocks serve as the fourth transmission block, and it is not necessary to generate feedback information. Wherein, each bit of the preset length corresponds to a reception result of a third transmission block, that is, the number of bits of the preset length is equal to the number of the third transmission block. In addition, the above partial transmission block includes at least one third transmission block.

Specifically, the transmission block selected according to the following scheme may be used as the third transmission block.

Solution 1: Determine the third transmission block and the fourth transmission block according to the priority of the received transmission block, and the priority of the third transmission block is not lower than the priority of the fourth transmission block.

Optionally, the number of the third transmission block is one, the number of the fourth transmission block is multiple, and the priority of the third transmission block is higher than the priority of the fourth transmission block.

Exemplarily, referring to Figure 4, assuming that the priority order is TB2>TB1>TB4>TB3, the transmission block TB2 with the highest priority is determined as the third transmission block, and the reception result of the transmission block with the highest priority corresponds to the final If the feedback information is generated, 1-bit HARQ feedback information is generated, so sequence-based PSFCH can be used for transmission. Then the generated feedback information is shown in Table 6A below.

Table 6A

It should be noted that Table 6A assumes that TB4 is not lost. Then, when any of TB1, TB2, and TB3 is lost, the receiving end can learn the loss of these three transmission blocks, because the receiving end cannot know the lost The priority of the transmission block will generate feedback information "00", that is, the transmission block has not been received correctly this time.

Optionally, the number of the third transmission block is multiple, and the number of the fourth transmission block is multiple. The priority of all third transmission blocks is higher than the priority of all fourth transmission blocks.

Exemplarily, referring to Figure 4, suppose the priority order is TB2>TB1>TB4>TB3, suppose that the upper limit of the load of the feedback resource is 2 bits or the upper limit of the sequence-based PSFCH format is 2 bits. Therefore, 1 can be selected in this solution. One or two transmission blocks are used as the third transmission block. For the current scenario where multiple transmission blocks with higher priority are used as the third transmission block, the two transmission blocks TB1 and TB2 with the highest priority are used as the third transmission block. Then TB3 and TB4 are the fourth transmission block. Then the generated feedback information is shown in Table 7A below.

Table 7A

It should be noted that Table 7A assumes that TB4 is not lost. Then, when any of TB1, TB2, and TB3 is lost, the receiving end can learn the loss of these three transmission blocks, because the receiving end cannot know the lost The priority of the transmission block will generate feedback information "00", that is, the transmission block has not been received correctly this time.

Optionally, the priority of the third transmission block is not lower than the priority of the fourth transmission block. That is, the priority of a part of the third transmission block is equal to the priority of a part of the fourth transmission block, and the scheduling order of the part of the third transmission block is earlier than the scheduling order of the part of the fourth transmission block.

Exemplarily, referring to FIG. 4, suppose the priority order of the sending end to send 4 transport blocks is TB2=TB1=TB4>TB3, the scheduling order is TB1>TB2>TB3>TB4, and the receiving end receives TB4. At this time, since the length of the feedback information needs to be determined according to the upper limit of the bearing of the feedback resource or the upper limit of the sequence-based PSFCH format, the number of third transmission blocks is determined. That is, the number of third transmission blocks is two at most. Since the scheduling sequence of TB1 is the same as TB4, when it is determined that the number of third transmission blocks is 2, then the third transmission blocks are TB1 and TB2. Then the generated feedback information is shown in Table 8A below.

Table 8A

It should be noted that Table 8A assumes that TB4 is not lost. Then, when any of TB1, TB2, and TB3 is lost, the receiving end can learn the loss of these three transmission blocks, because the receiving end cannot know the lost The priority of the transmission block will generate feedback information "00", that is, the transmission block has not been received correctly this time.

Solution 2: Determine a part of the received transmission blocks with an earlier scheduling sequence as the third transmission block, and determine the remaining transmission blocks as the fourth transmission block.

Optionally, the number of the third transmission block is one, the number of the fourth transmission block is multiple, and the scheduling sequence of the third transmission block is earlier than the scheduling sequence of the fourth transmission block.

Exemplarily, referring to Fig. 4, the first scheduled transport block TB1 is taken as the third transport block, then the reception result of the first scheduled transport block corresponds to the final feedback information, and 1-bit HARQ feedback information is generated. Therefore, sequence-based PSFCH can be used for transmission. Then the generated feedback information is shown in Table 9A below.

Table 9A

HARQ信息对应反馈状态HARQ information corresponding to feedback status	HARQHARQ
TB1 NACKTB1 NACK	00
TB1ACKTB1ACK	11

Optionally, the number of the third transmission block is multiple, and the number of the fourth transmission block is multiple. The scheduling order of all third transmission blocks is prior to the scheduling order of all fourth transmission blocks.

Exemplarily, referring to Figure 4, the current load limit of the feedback resource or sequence-based PSFCH format is 2 bits. Therefore, one or two transmission blocks can be selected as the third transmission block in the scheme. In a scenario where multiple transmission blocks with the first sequence are determined as the third transmission block, the two transmission blocks TB1 and TB2 with the first scheduling sequence are the third transmission blocks, and TB3 and TB4 are the fourth transmission blocks. Then the generated feedback information is shown in Table 10A below.

Table 10A

HARQ信息对应反馈状态HARQ information corresponding to feedback status	HARQHARQ
TB1NACK+TB2NACK；TB1NACK+TB2NACK;	0000
TB1NACK+TB2ACKTB1NACK+TB2ACK	0101
TB1ACK+TB2NACKTB1ACK+TB2NACK	1010
TB1ACK+TB2ACKTB1ACK+TB2ACK	1111

S103: The first device sends feedback information to the second device.

Specifically, the first device will use the first feedback resource to send the feedback information generated in step S102 to the second device. According to the above-mentioned transmission block, each transmission block will correspond to a feedback resource. Feedback and reception on resources can successfully transmit feedback information.

Then, because when the last consecutive transmission block or blocks sent by the sender is lost, the receiver cannot know the loss. Therefore, to address this problem, rules can be formulated to stipulate that the receiving end sends feedback information at the feedback resource corresponding to the latest transmission block received, and the sending end sends feedback information from the feedback resource corresponding to the latest transmission block to the first dispatch The feedback resource corresponding to a transport block of one transmission block receives feedback information in turn until the feedback information is received. Then, the second device can determine whether the first device has lost the last scheduled part of the transmission block. If the transmission information is not received at the corresponding feedback resource, then the transmission block corresponding to the feedback resource has been lost, and retransmission is required. The corresponding transmission block at the feedback resource.

Exemplarily, referring to FIG. 4, assuming that TB4 is lost, the receiving end considers TB3 to be the latest scheduled transmission block, and sends feedback information at the feedback resource corresponding to TB3. After that, the sender will first receive the feedback resource corresponding to the latest transmission block TB4. At this time, if no feedback information is received, the sender will know that the receiver has lost TB4 (not received), and then , The sender starts with the feedback resource corresponding to the latest scheduled transport block to the feedback resource corresponding to the first scheduled transport block, until the feedback information is received. In this way, the receiver can know the lost transport block, and then Determine the transport block that needs to be retransmitted according to the received feedback information.

If the received feedback information contains NACK, the transport block corresponding to the NACK information needs to be retransmitted. If the detected feedback information contains ACK, there is no need to retransmit the transport block corresponding to the ACK information.

S104. The second device sends the transmission block that needs to be retransmitted to the first device.

In a possible implementation manner, if the feedback information is feedback information generated by the first device by binding the reception results of all transmission blocks. Then, when the feedback information indicates that the transmission block reception failed, that is, the response information is NACK(0), it is necessary to retransmit all the transmission blocks sent by the second device to the first device.

In a possible implementation manner, if the feedback information is generated by the first device by binding partial transmission blocks and the feedback information includes the first feedback information and the second feedback information, then if the first feedback information is based on multiple The reception result of the first transmission block is bundled and generated, and the first feedback information indicates that the reception of the transmission block fails, the transmission blocks that need to be retransmitted are multiple first transmission blocks; if the second feedback information is based on the reception of the second transmission block As a result, the binding is generated, and the second feedback information indicates that the transmission block reception fails, the transmission block to be retransmitted is multiple second transmission blocks. If the first feedback information or the second feedback information is generated according to the reception result of a single transmission block, the transmission block that needs to be retransmitted is the single transmission block.

Exemplarily, referring to Fig. 4, different transmission blocks that need to be retransmitted are determined according to different scenarios generated by the feedback information in step S102. The following Table 1B, Table 2B, Table 3B, Table 4B, and Table 5B may respectively correspond to the foregoing Table 1A, Table 2A, Table 3A, Table 4A, and Table 5A to determine different transmission blocks that need to be retransmitted.

Table 1B

Table 2B

Table 3B

Table 4B

应答信息Response message	HARQHARQ	需要重传的传输块Transport block to be retransmitted
TB1 NACK+TB2/3/4中至少一个NACKAt least one NACK in TB1 NACK+TB2/3/4	0000	TB1、TB2、TB3、TB4TB1, TB2, TB3, TB4
TB1NACK+TB2/3/4均ACKTB1NACK+TB2/3/4 both ACK	0101	TB1TB1
TB1ACK+TB2/3/4中至少一个NACKAt least one NACK in TB1ACK+TB2/3/4	1010	TB2、TB3、TB4TB2, TB3, TB4
TB1ACK+TB2/3/4均ACKTB1ACK+TB2/3/4 both ACK	1111	无no

Table 5B

It should be noted that the above Table 1B, Table 2B and Table 3B are all scenarios where some of the transport blocks scheduled at the latest are not lost. If the transport block scheduled at the latest is lost, any feedback information received needs to be lost. Part of the transmission block scheduled at the latest is retransmitted. Exemplarily, assuming that in FIG. 4, the latest scheduled transmission block TB4 is lost, then the following Table 1C, Table 2C, Table 3C, Table 4C, and Table 5C can respectively correspond to the foregoing Table 1A, Table 2A, and Table 3A , Table 4A and Table 5A determine different transmission blocks that need to be retransmitted.

Table 1C

Table 2C

Table 3C

Table 4C

应答信息Response message	HARQHARQ	需要重传的传输块Transport block to be retransmitted
TB1 NACK+TB2/3中至少一个NACKAt least one NACK in TB1 NACK+TB2/3	0000	TB1、TB2、TB3、TB4TB1, TB2, TB3, TB4
TB1NACK+TB2/3均ACKTB1NACK+TB2/3 are ACK	0101	TB1、TB4TB1, TB4
TB1ACK+TB2/3中至少一个NACKAt least one NACK in TB1ACK+TB2/3	1010	TB2、TB3、TB4TB2, TB3, TB4
TB1ACK+TB2/3均ACKTB1ACK+TB2/3 both ACK	1111	TB4TB4

Table 5C

应答信息Response message	HARQHARQ	需要重传的传输块Transport block to be retransmitted
TB1/2至少一个NACK+TB3 NACKTB1/2 at least one NACK+TB3 NACK	0000	TB1、TB2、TB3、TB4TB1, TB2, TB3, TB4
TB1/2至少一个NACK+TB3ACKTB1/2 at least one NACK+TB3ACK	0101	TB1、TB2、TB4TB1, TB2, TB4
TB1/2ACK+TB3 NACKTB1/2ACK+TB3 NACK	1010	TB3、TB4TB3, TB4
TB1/2ACK+TB3 ACKTB1/2ACK+TB3 ACK	1111	TB4TB4

In a possible implementation manner, if the feedback information is generated based on the reception result of part of the transmission block, when the first bit of the feedback information indicates that the transmission block has failed to be received, it is determined that the transmission block to be retransmitted is the first bit corresponding to the first bit. Three transmission blocks and a fourth transmission block. That is to say, when the feedback information is a failure, it is necessary to retransmit the transmission block corresponding to the failure response and all transmission blocks except the transmission block generating the feedback information.

Exemplarily, referring to Fig. 4, different transmission blocks that need to be retransmitted are determined according to different scenarios generated by the feedback information in step S102. The following Table 6B, Table 7B, Table 8B, Table 9B, and Table 10B may respectively correspond to the foregoing Table 6A, Table 7A, Table 8A, Table 9A, and Table 10A to determine different transmission blocks that need to be retransmitted.

Table 6B

Table 7B

Table 8B

Table 9B

应答信息Response message	HARQHARQ	需要重传的传输块Transport block to be retransmitted
TB1 NACKTB1 NACK	00	TB1、TB2、TB3、TB4TB1, TB2, TB3, TB4
TB1 ACKTB1 ACK	11	TB2、TB3、TB4TB2, TB3, TB4

Table 10B

应答信息Response message	HARQHARQ	需要重传的传输块Transport block to be retransmitted
TB1NACK+TB2NACK；TB1NACK+TB2NACK;	0000	TB1、TB2、TB3、TB4TB1, TB2, TB3, TB4
TB1NACK+TB2ACKTB1NACK+TB2ACK	0101	TB1、TB3、TB4TB1, TB3, TB4
TB1ACK+TB2NACKTB1ACK+TB2NACK	1010	TB2、TB3、TB4TB2, TB3, TB4
TB1ACK+TB2ACKTB1ACK+TB2ACK	1111	TB3、TB4TB3, TB4

After determining the transmission blocks that need to be retransmitted, the second device adds some redundant bits to the encoded bits of these transmission blocks and sends them to the first device again to reduce the channel coding rate, so that the first device can obtain better decoding results .

In the feedback information transmission method provided by the embodiments of the present application, the receiving end generates feedback information by binding the reception results of the received transmission blocks, or generates feedback information according to the reception results of some of the received transmission blocks. Furthermore, the resources occupied by the feedback information are effectively reduced, and the system can work effectively when only supporting the sequence-based feedback channel format, which reduces the complexity of system design. Compared with the prior art, the number of bits used to transmit feedback information using the sequence-based PSFCH format is limited, and the HARQ information corresponding to each transmission block cannot be transmitted. In the embodiment of the present application, fewer bits can be generated through the first preset rule. Several feedback information can be transmitted using sequence-based feedback channels.

The embodiment of the present application provides a feedback information transmission method. As shown in FIG. 6, the method may include S201-S204:

S201: The first device receives multiple transmission blocks sent by the second device.

In a possible implementation, the number of multiple transport blocks sent by the second device may be based on the upper limit of the bearer of the feedback resources used to send the HARQ information of the multiple transport blocks, or the number of transport blocks that can be carried using the sequence-based PSFCH format. The feedback information is at most 2 bits, or the PSFCH resource configuration period N=1, 2, and 4 are determined by one or more factors. That is, in order to avoid the complexity of the system, the processing method for the reception result of the transmission block in step S102 is not adopted. Instead, when the delay at the sending end allows, the sending device matches different transmission blocks sent to different PSFCH resource configuration periods to avoid the problem that the generated feedback information exceeds the feedback channel or the upper limit of the feedback resource bearing.

Optionally, the number of multiple transmission blocks sent by the second device to the first device is less than or equal to a preset threshold, and the preset threshold is based on the configuration period of the feedback resource set, the format of the feedback channel, and the number of transmission blocks used to send the multiple transmissions. One or more of the size of the feedback resource of the HARQ information of the block is determined. Wherein, the resource set is a resource set for sending or receiving data, and the feedback resource set is a resource set for sending or receiving feedback information. The feedback resource set is a system-level resource subset periodically pre-configured in a resource set for sending feedback information, wherein the device sending data in the resource set receives feedback information in the feedback resource set, or correspondingly , A device that receives data in the resource set sends feedback information in the feedback resource set; the feedback resource is a resource used by the first device to send feedback information, and the feedback resource is a subset of the feedback resource set.

Specifically, when each transport block is sent, a feedback resource is matched correspondingly, so the sending end (the second device) can perform scheduling restriction to avoid the receiving end from feeding back HARQ information corresponding to more than 2 TBs at the same time. That is, the preset threshold may be formulated so that the number of multiple transmission blocks sent by the second device to the first device is less than or equal to the preset threshold. The preset threshold is determined according to one or more of the configuration period of the feedback resource set, the size of the feedback resource, and the format of the feedback channel.

Exemplarily, referring to Fig. 4, the scheduling sequence is TB1>TB2>TB3>TB4. The feedback resources corresponding to TB1 to TB4 are all in time slot 7. The upper limit for transmitting HARQ information using the sequence-based PSFCH format is 2 bits, so the preset threshold can be set to 2. That is, the second device sends at most two transmission blocks in the same time slot feedback where the feedback resource set exists, so that the first device only generates 2 bits of feedback information at most. Then, the second device will no longer send TB3 after sending TB1 and TB2, but chooses to send TB3 after time slot 7, so that the feedback information corresponding to TB3 does not need to be sent in time slot 7. In this case, the system can work when only the sequence-based PSFCH format is supported. Reduce the complexity of the system design and improve the performance of the system.

Optionally, the period for the second device to send the transmission block is greater than or equal to the configuration period of the feedback resource set.

Specifically, the feedback resource is the resource in the PSFCH resource, which may be configured by the access network device and instructed to the terminal device, or pre-configured in a certain resource pool and/or resource set. Among them, pre-configuration refers to pre-written in the terminal device, or through the operation and maintenance management (Operation Administration and Maintenance, OAM) configuration to the terminal device. The configuration feedback resource set is configured according to a certain period. Therefore, when the period of the second device sending the transport block is greater than or equal to the configuration period of the feedback resource set, only one HARQ information needs to be fed back in each feedback period. Furthermore, the upper limit of the bearing capacity of the feedback resource or the sequence-based PSFCH format will not be exceeded. Exemplarily, referring to FIG. 4, the feedback period N=4, then the sending period of the second device may be an integer greater than or equal to 4. Assuming that the sending period is 5, after sending TB1 in time slot 3, the second device needs to send TB2 in time slot 8, TB3 in time slot 13, and TB4 in time slot 18. Therefore, the first device only needs to send the feedback information corresponding to TB1 in time slot 7, and there will be no problem that the size of the feedback information exceeds the feedback resource or the upper limit of the sequence-based feedback channel bearer.

Optionally, the period for the second device to reserve resources needs to be greater than or equal to the configuration period of the feedback resource set.

Specifically, assuming that the resources used by different transmission blocks are reserved, the second device reserves resources and selectively sends the transmission blocks according to the configuration period and service delay requirements of the feedback resource set. Exemplarily, the period of the resources reserved for different transmission blocks is greater than or equal to the configuration period of the feedback resource set. This can prevent the first device from needing to send multiple feedback channels in parallel in the same time slot.

S202: The first device generates feedback information.

The feedback information is determined according to the received results of the multiple transmission blocks, and is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks.

The feedback information may be feedback information generated according to the first preset rule in step S102. It may also be feedback information generated by multiplexing multiple HARQ information generated corresponding to multiple transport blocks. Or it is feedback information generated in other ways in the prior art, which is not specifically limited in the embodiment of the present application.

S203: The first device determines the second feedback resource according to the second preset rule, and uses the second feedback resource to send feedback information to the second device.

The second preset rule is: the feedback resource corresponding to the transmission block with the highest priority is determined to be the second feedback resource; or, the feedback resource corresponding to the transmission block received first is determined to be the second feedback resource; or, the most received The largest feedback resource among the feedback resources corresponding to the two transmission blocks is determined to be the second feedback resource; or, the smallest feedback resource among the feedback resources corresponding to the received multiple transmission blocks is determined to be the second feedback resource; or, the number of feedback resources received The feedback resource corresponding to the transmission block with the largest frequency domain resource index among the feedback resources corresponding to each transmission block is determined to be the second feedback resource; or, among the feedback resources corresponding to the multiple transmission blocks received, the transmission block with the smallest frequency domain resource index corresponds to The feedback resource of is determined to be the second feedback resource; or, the feedback resource corresponding to the multiple received transmission blocks is determined to be the second feedback resource.

Optionally, in a possible implementation manner, the type of data sent by the second device may be broadcast data, multicast data, or unicast data. When the data type sent by the second device is broadcast data, the first device does not need to generate feedback information to feed back the reception result. When the data type sent by the second device is multicast data, each data packet (transmission block) sent by the second device to the first device corresponds to a feedback resource. When the data type sent by the second device is unicast data, the first transmission block TB1 sent by the second device will correspond to a feedback resource 1 in the first device, and then the second device will continue to send data blocks such as TB2, TB3, TB4, etc. , According to the destination address or source address established by the unicast link (destination ID/source ID), it is determined that the feedback resource corresponding to TB2, TB3, and TB4 for transmitting feedback information is feedback resource 1, that is, when the second device sends When the data type is unicast data, the sent data blocks are all mapped to the same feedback resource. Specifically, the manner in which the transmission block sent by the second device determines the feedback resource can be determined according to the following formula: f(PSCCH/PSSCH slot index, PSCCH/PSSCH subchannel, destination ID/source ID, unicast/groupcast/broadcast ). That is, the feedback resource used to transmit the feedback information is determined by the data type sent by the sender, time domain resources, frequency domain resources, sender ID, and receiver ID.

It can be seen that when the second device sends multiple transmission blocks to the first device as multicast or unicast data, each transmission block corresponds to a feedback resource for sending the feedback information generated by the transmission block. , It is necessary to determine which transport block corresponds to the feedback resource to send feedback information, so that the feedback information sent by the first device can be received by the second device. Therefore, according to the second preset rule, the second feedback resource for sending the feedback information generated by the first device is determined.

S204: The second device sends the transmission block that needs to be retransmitted to the first device.

Specifically, when the received feedback information is ACK, there is no need to retransmit the transport block. When the received feedback information is NACK, the transmission block that needs to be retransmitted is the transmission block corresponding to the NACK information.

The feedback information transmission method provided in the embodiment of the present application can determine the second feedback resource according to the second preset rule. Compared with the prior art, the base station determines the feedback resource used for transmitting feedback information. In the embodiment of the present application, the feedback resource used for PSFCH transmission in the side link is defined, so that the communication process can be carried out effectively. And according to the various rules for generating feedback information, a variety of ways to determine feedback resources are correspondingly defined, which provides more possibilities for system design. Can optimize the efficiency and performance of system operation.

The embodiment of the present application may divide the network elements into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation.

FIG. 7 shows a schematic diagram of a possible structure of the feedback information transmission device involved in the foregoing embodiment. The device may be the first device (receiving device) for generating and sending feedback information. The device includes: a receiving module 701, a generating module 702, and a sending module 703.

The receiving module 701 is configured to receive multiple transmission blocks sent by the second device.

The generating module 702 is configured to generate feedback information according to a first preset rule. The first preset rule includes: generating feedback information in a manner of bundling according to the reception results of multiple transmission blocks, or according to parts of multiple transmission blocks The reception result of the transport block generates feedback information.

The sending module 703 is configured to send feedback information to the second device, and the feedback information is used to indicate whether the first device correctly receives response information of multiple transmission blocks.

Optionally, the length of the feedback information is a preset length; the generating module 702 is specifically configured to generate feedback information by binding the reception results of all transmission blocks or binding the reception results of some transmission blocks.

Optionally, the multiple transmission blocks include a first transmission block and a second transmission block; the feedback information includes first feedback information and second feedback information; the generating module 702 is specifically configured to generate the first feedback according to the reception result of the first transmission block Information, the second feedback information is generated according to the reception result of the second transmission block; where the number of the first transmission block or the second transmission block is one or more; when the number of the first transmission block or the second transmission block is multiple At this time, the reception results of multiple first transmission blocks are bound to generate first feedback information or the reception results of multiple second transmission blocks are bound to generate second feedback information.

Optionally, the priority of the first transmission block is not lower than the priority of the second transmission block.

Optionally, the scheduling sequence of the first transmission block is prior to the scheduling sequence of the second transmission block; wherein, the scheduling sequence is the sequence in which the first device receives multiple transmission blocks.

Optionally, the first transmission block is the first scheduled transmission block among at least one transmission block with the highest priority among multiple transmission blocks.

Optionally, the first transmission block is at least one transmission block with the highest priority among multiple transmission blocks.

Optionally, the length of the feedback information is a preset length; some transmission blocks include at least one third transmission block, and the generating module 702 is specifically configured to determine the number of third transmission blocks according to the preset length; where one of the preset lengths The bit corresponds to the reception result of one third transmission block; the feedback information is generated according to the reception result of the above-mentioned number of third transmission blocks.

Optionally, the priority of the third transmission block is not lower than the priority of the fourth transmission block, and the fourth transmission block is a transmission block excluding the third transmission block from all transmission blocks received by the first device.

Optionally, the scheduling sequence of the third transmission block is prior to the scheduling sequence of the fourth transmission block, and the fourth transmission block is a transmission block other than the third transmission block among all transmission blocks received by the first device.

Optionally, the priority of part of the third transmission block is equal to the priority of part of the fourth transmission block, and the scheduling sequence of the part of the third transmission block is earlier than the scheduling sequence of the part of the fourth transmission block.

Optionally, the sending module is specifically configured to send feedback information to the second device by the first device using the first feedback resource, where the first feedback resource is: the feedback resource corresponding to the transport block received last.

FIG. 8 shows a schematic diagram of a possible structure of the feedback information transmission device involved in the foregoing embodiment. The device may be a second device (sender device), which is used to receive and parse feedback information. The device includes: a sending module 801 and a receiving module 802.

The sending module 801 is configured to send multiple transmission blocks to the first device.

The receiving module 802 is configured to receive feedback information sent by the first device, and the feedback information is used to indicate whether the first device correctly receives response information of multiple transmission blocks; the feedback information is the feedback generated by the first device according to the first preset rule Information, the first preset rule includes: generating feedback information in a manner of bundling according to the receiving results of multiple transmission blocks, or generating feedback information according to the receiving results of some of the multiple transmission blocks;

The sending module 801 is also used for the second device to send the transmission block to be retransmitted to the first device.

Optionally, the receiving module 802 is specifically configured to receive feedback information according to a second preset rule; the second preset rule includes: sequentially receiving feedback information from the feedback resources corresponding to the latest scheduled transmission block according to the scheduling sequence.

Optionally, if there is no feedback information at the received feedback resource, the sending module 801 retransmits the transport block corresponding to the received feedback resource.

FIG. 9 shows a schematic diagram of a possible structure of the feedback information transmission device involved in the foregoing embodiment. The device may be the first device (receiving device) for generating and sending feedback information. The device includes: a receiving module 901, a generating module 902, a determining module 903, and a sending module 904.

The receiving module 901 is configured to receive multiple transmission blocks sent by the second device.

The generating module 902 is configured to generate feedback information according to the reception results of the multiple transmission blocks, and the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks.

The determining module 903 is configured to determine the second feedback resource according to the second preset rule.

The sending module 904 is configured to send feedback information to the second device by using the second feedback resource.

Optionally, the second preset rule is: the feedback resource corresponding to the transport block with the highest priority is determined to be the second feedback resource; or, the feedback resource corresponding to the transport block received first is determined to be the second feedback resource; or, The largest feedback resource among the feedback resources corresponding to the received multiple transmission blocks is determined as the second feedback resource; or, the smallest feedback resource among the feedback resources corresponding to the received multiple transmission blocks is determined as the second feedback resource; or, Among the feedback resources corresponding to the received multiple transmission blocks, the feedback resource corresponding to the transmission block with the largest frequency domain resource index is determined as the second feedback resource; or, among the feedback resources corresponding to the multiple received transmission blocks, the frequency domain resource index is the smallest The feedback resource corresponding to the transmission block of is determined as the second feedback resource; or, the feedback resource corresponding to the multiple received transmission blocks is determined as the second feedback resource.

FIG. 10 shows a schematic diagram of a possible structure of the feedback information transmission device involved in the foregoing embodiment. The device may be a second device (sender device), which is used to receive and parse feedback information. The device includes: a sending module 1001 and a receiving module 1003.

The sending module 1001 is used to send multiple transmission blocks to the first device.

The receiving module 1003 is configured to receive feedback information sent by the first device, and the feedback information is used to indicate whether the first device correctly receives response information of multiple transmission blocks.

The sending module 1001 is also used for the second device to send the transmission block that needs to be retransmitted to the first device.

Optionally, the device further includes a determining module 1002, configured to determine that the number of multiple transmission blocks is less than or equal to a preset threshold, and the preset threshold is determined according to at least one of the following: the configuration period of the feedback resource set, the feedback channel Format, the size of the feedback resource. The feedback resource set is a pre-configured resource set, and the feedback resource is a resource used to send feedback information.

Optionally, the determining module is further configured to determine that the transmission block transmission period is greater than or equal to the configuration period of the feedback resource set.

FIG. 11 shows a schematic diagram of a possible structure of the device involved in the foregoing embodiment. The communication device (device) may be the aforementioned first device or second device, for example. The communication device can also exist in the form of software, or a chip that can be used in equipment. The communication device includes: a processing unit 1102 and a communication unit 1103. Optionally, the communication unit 1103 may also be divided into a sending unit (not shown in FIG. 11) and a receiving unit (not shown in FIG. 11). The sending unit is used to support the communication device to send information to other network elements. The receiving unit is used to support the communication device to receive information from other network elements.

Optionally, the communication device may further include a storage unit 1101 for storing program code and data of the communication device, and the data may include but not limited to raw data or intermediate data.

The processing unit 1102 may be used to support the generation and analysis of feedback resources. When the device is the first device, the processing unit 1102 may determine to generate feedback information according to the status of the received transmission block, so as to subsequently send the feedback information to obtain the retransmitted transmission block. When the device is the second device, the processing unit 1102 is used to process the aforementioned feedback information, determine the data block to be retransmitted, and add redundant bits to the retransmitted data block, so as to improve the decoding rate of the first transmission block. And/or other processes used in the scheme described herein.

The communication unit 1103 is used to support communication between the device and other network elements, for example, to support the device to perform S101, S103, etc. in FIG. 5. Optionally, when the communication unit is divided into a sending unit and a receiving unit, the sending unit is used to support the device to send information to other network elements. For example, the device is supported to perform S103 in FIG. 4, etc., and/or other processes used in the solution described herein. The receiving unit is used to support the device to receive information from other network elements. For example, the device is supported to perform S101 in FIG. 4, etc., and/or other processes used in the solution described herein.

In one possible manner, the processing unit 1102 may be a controller or the processor 301 or the processor 304 shown in FIG. 3, for example, a central processing unit (CPU), a general-purpose processor, or digital signal processing ( digital signal processing (DSP), application specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any of them combination. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 1103 may be the communication interface 304 shown in FIG. 3, or may be a transceiver or the like. The storage unit 1101 may be the memory 303 shown in FIG. 3.

The embodiment of the present application also provides a computer storage medium for storing computer software instructions used by the above feedback information transmission device, including a program designed to execute the steps performed by the feedback information transmission device in the above embodiment.

The embodiment of the present application also provides a computer program product, for example, a computer-readable storage medium, including a program designed to execute the steps executed by the feedback information transmission device in the foregoing embodiment.

The embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port, where the processor is used to implement the processing functions involved in the foregoing method embodiment, and the input/output port is used to implement the transceiver function involved in the foregoing method embodiment.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data that implement the functions involved in the foregoing method embodiments.

The chip system can be composed of chips, or include chips and other discrete devices.

The steps of the method or algorithm described in conjunction with the disclosure of this application can be implemented in a hardware manner, or implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read only memory (ROM), erasable programmable read-only memory ( erasable programmable ROM (EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), register, hard disk, portable hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC.

In the several embodiments provided in this application, it should be understood that the disclosed method and device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network devices. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

Through the description of the above implementation manners, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general hardware. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. . Based on this understanding, the technical solution of this application essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a computer floppy disk. , A hard disk or an optical disk, etc., include a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present application.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this, and changes or substitutions within the technical scope disclosed in this application should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A feedback information transmission method, characterized in that, the method includes:

The first device receives multiple transmission blocks sent by the second device;

The first device generates feedback information according to a first preset rule, and the first preset rule includes: generating the feedback information in a manner of bundling according to the reception results of multiple transmission blocks, or according to multiple transmission blocks The feedback information is generated by receiving results of part of the transmission blocks in;

The first device sends the feedback information to the second device, where the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks.
The feedback information transmission method according to claim 1, wherein the length of the feedback information is a preset length; the generating of the feedback information by bundling according to the reception results of multiple transmission blocks includes :

The feedback information is generated by bundling the reception results of all transmission blocks or bundling the reception results of some transmission blocks.
The feedback information transmission method according to claim 2, wherein the multiple transmission blocks include a first transmission block and a second transmission block; the feedback information includes the first feedback information and the second feedback information; the The feedback information generated by the reception result of the bound partial transmission block includes:

The first feedback information is generated according to the reception result of the first transmission block, and the second feedback information is generated according to the reception result of the second transmission block; wherein, the first transmission block or the second transmission The number of blocks is one or more;

When the number of the first transmission block or the second transmission block is multiple, the reception results of the multiple first transmission blocks are bound to generate the first feedback information or the number of the multiple second transmission blocks Receiving the result binding to generate the second feedback information.
The feedback information transmission method according to claim 3, wherein:

The priority of the first transmission block is not lower than the priority of the second transmission block.
The feedback information transmission method according to claim 3, wherein:

The scheduling sequence of the first transmission block is prior to the scheduling sequence of the second transmission block; wherein the scheduling sequence is the sequence in which the first device receives the multiple transmission blocks.
The feedback information transmission method according to claim 4, wherein:

The first transmission block is the first scheduled transmission block among at least one transmission block with the highest priority among the multiple transmission blocks.
The feedback information transmission method according to claim 4, wherein:

The first transmission block is at least one transmission block with the highest priority among the multiple transmission blocks.
The feedback information transmission method according to claim 1, wherein the length of the feedback information is a preset length; the partial transmission block includes at least one third transmission block, and the The feedback information generated from the reception result of the partial transmission block includes:

Determining the number of third transmission blocks according to the preset length; wherein one bit of the preset length corresponds to a reception result of one third transmission block;

The feedback information is generated according to the reception result of the number of third transmission blocks.
The feedback information transmission method according to claim 8, wherein:

The priority of the third transmission block is not lower than the priority of the fourth transmission block, and the fourth transmission block is a transmission block excluding the third transmission block from all transmission blocks received by the first device.
The feedback information transmission method according to claim 8, wherein:

The scheduling sequence of the third transmission block is prior to the scheduling sequence of the fourth transmission block, and the fourth transmission block is a transmission block other than the third transmission block among all transmission blocks received by the first device.
The feedback information transmission method according to claim 9, wherein the priority of part of the third transmission block is equal to the priority of part of the fourth transmission block, and the scheduling sequence of the part of the third transmission block is earlier than that of the part of the third transmission block. The scheduling sequence of the fourth transmission block.
The feedback information transmission method according to any one of claims 1-11, wherein the sending of the feedback information by the first device to the second device comprises:

The first device uses a first feedback resource to send the feedback information to the second device, where the first feedback resource is: a feedback resource corresponding to a transport block received last.
A feedback information transmission method, characterized in that, the method includes:

The second device sends multiple transmission blocks to the first device;

The second device receives the feedback information sent by the first device, where the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transport blocks; the feedback information is the first The feedback information generated by the device according to a first preset rule, where the first preset rule includes: generating the feedback information in a manner of bundling according to the reception results of multiple transmission blocks, or according to parts of multiple transmission blocks The feedback information is generated by the reception result of the transmission block;

The second device sends the transmission block that needs to be retransmitted to the first device.
The feedback information transmission method according to claim 13, wherein the second device receiving the feedback information sent by the first device comprises:

The second device receives the feedback information according to a second preset rule; the second preset rule includes: sequentially receiving the feedback information from the feedback resource corresponding to the latest scheduled transmission block according to the scheduling sequence.
The feedback information transmission method according to claim 13, wherein:

If there is no feedback information at the received feedback resource, retransmit the transport block corresponding to the received feedback resource.
A method for transmitting feedback information, characterized in that the method includes:

The first device receives multiple transmission blocks sent by the second device;

The first device generates feedback information according to the reception results of the multiple transmission blocks; wherein the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks;

The first device determines the second feedback resource according to a second preset rule;

The first device uses the second feedback resource to send the feedback information to the second device.
The feedback information transmission method according to claim 16, wherein the second preset rule is:

The feedback resource corresponding to the transmission block with the highest priority is determined to be the second feedback resource;

Or, the feedback resource corresponding to the transport block received first is determined as the second feedback resource;

Or, the largest feedback resource among the feedback resources corresponding to the received multiple transport blocks is determined to be the second feedback resource;

Or, the smallest feedback resource among the feedback resources corresponding to the received multiple transmission blocks is determined as the second feedback resource;

Or, the feedback resource corresponding to the transmission block with the largest frequency domain resource index among the feedback resources corresponding to the received multiple transmission blocks is determined as the second feedback resource;

Or, the feedback resource corresponding to the transmission block with the smallest index of the frequency domain resource among the feedback resources corresponding to the received multiple transmission blocks is determined as the second feedback resource;

Or, the feedback resources corresponding to the multiple received transmission blocks are determined as the second feedback resource.
A feedback information transmission method, characterized in that, the method includes:

The second device sends multiple transmission blocks to the first device;

Receiving, by the second device, feedback information sent by the first device, where the feedback information is used to indicate whether the first device correctly receives the response information of the multiple transmission blocks;

The second device sends the transmission block that needs to be retransmitted to the first device.
The feedback information transmission method according to claim 18, wherein the method further comprises:

The number of the multiple transmission blocks is less than or equal to a preset threshold, and the preset threshold is determined according to at least one of the following: the configuration period of the feedback resource set, the format of the feedback channel, the size of the feedback resource; the feedback resource set It is a pre-configured resource set, and the feedback resource is a resource for sending feedback information.
The feedback information transmission method according to any one of claims 18-19, wherein:

The period during which the second device sends the transport block is greater than or equal to the configuration period of the feedback resource set.
A device characterized by comprising: a processor and a memory;

The memory is used to store computer-executable instructions, and when the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes any one of claims 1-12 The feedback information transmission method described above, or so that the device executes the feedback information transmission method according to any one of claims 13-15.
A device characterized by comprising: a processor and a memory;

The memory is used to store computer-executable instructions, and when the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes any one of claims 16-17 The feedback information transmission method described above, or so that the device executes the feedback information transmission method according to any one of claims 18-20.
A device, characterized in that the device executes the feedback information transmission method according to any one of claims 1-12, or the device executes the feedback according to any one of claims 13-15 Information transmission method.
A device, characterized in that the device executes the feedback information transmission method according to any one of claims 16-17, or the device executes the feedback according to any one of claims 18-20 Information transmission method.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the computer executes the instructions, the computer executes the feedback information transmission according to any one of claims 1 to 12 Method, or execute the feedback information transmission method according to any one of claims 13 to 15, or execute the feedback information transmission method according to any one of claims 16 to 17, or execute as claimed The feedback information transmission method described in any one of 18 to 20.
A computer program product containing instructions, characterized in that, when the computer program product runs on a computer, the computer executes the feedback information transmission method according to any one of claims 1 to 12, or executes the The feedback information transmission method according to any one of claims 13 to 15, or the feedback information transmission method according to any one of claims 16 to 17, or any one of claims 18 to 20 The feedback information transmission method.