CN112398597A

CN112398597A - Feedback information transmission method and device

Info

Publication number: CN112398597A
Application number: CN201910760452.2A
Authority: CN
Inventors: 黄海宁; 黎超; 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-02-23
Anticipated expiration: 2039-08-16
Also published as: CN112398597B; WO2021032018A1

Abstract

The application provides a feedback information transmission method and device, relates to the field of communication, and can effectively reduce the bit number of feedback information. The method comprises the following steps: the method comprises the steps that a first device receives a plurality of transmission blocks sent by a second device; the first device generates feedback information according to a first preset rule, wherein the first preset rule comprises: generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks; the first device sends feedback information to the second device, wherein the feedback information is used for indicating whether the first device correctly receives the response information of the plurality of transport blocks.

Description

Feedback information transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a feedback information transmission method and apparatus.

Background

In a wireless communication system, a hybrid automatic repeat request (HARQ) technique is generally used between a transmitter and a receiver to improve the reliability of data transmission. HARQ is a hybrid of forward error correction coding (FEC) and automatic repeat-request (ARQ). The method not only can check the error of the code word sent by the sending end, but also has certain error correction capability. Specifically, the sending end sends a Transport Block (TB) to the receiving end, and if the receiving end successfully receives the TB and can decode the TB correctly, an Acknowledgement (ACK) is fed back to the sending end; and if the receiving end fails to receive or cannot decode correctly, feeding back a Negative Acknowledgement (NACK) to the sending end. After receiving ACK from the receiving end, the sending end acquires that the TB transmission is successful; after receiving NACK from the receiving end, the transmitting end learns that the TB transmission fails, and may retransmit the TB to the receiving end.

Broadcast, unicast, and multicast are supported in the vehicle to entertainment (V2X) system. If the type of the transmitted data is broadcast data, the feedback of the receiving end is not needed. If the transmitted data is unicast or multicast data, feedback from the receiving end is needed, that is, HARQ feedback needs to be supported in unicast and multicast. And HARQ information is carried using a physical downlink feedback channel (PSFCH).

Currently, the New Radio (NR) V2X system supports a one symbol sequence-based PSFCH format, which can support 1-2 bits. In NR V2X, the configuration cycle of the PSFCH resource is N slots, where N is 1/2/4. That is, there is one PSFCH resource in every 1/2/4 timeslots, when the HARQ information to be transmitted exceeds the upper limit of the sequence-based PSFCH format by 2 bits, the receiving end cannot use the sequence-based PSFCH format to transmit more than 2 bits of HARQ information.

Disclosure of Invention

Embodiments of the present application provide a feedback information transmission method and apparatus, which can reduce the number of bits for transmitting feedback information, thereby implementing feedback using a sequence-based feedback channel.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, the present application provides a feedback information transmission method, which may include: the method comprises the steps that a first device receives a plurality of 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 feedback information to the second device, wherein the feedback information is used for indicating whether the first device correctly receives response information of the plurality of transmission blocks. Wherein the first preset rule comprises: and generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks.

Therefore, by means of binding bundling of the receiving results of the plurality of transmission blocks to generate feedback information or generating the feedback information according to the receiving results of part of the transmission blocks in the plurality of transmission blocks, resources occupied by the feedback information can be effectively reduced, the system can effectively work when only a feedback channel format based on the sequence is supported, and complexity of system design is reduced.

In a possible implementation manner, the length of the feedback information is a preset length. Generating feedback information by binding bundling according to the receiving results of the plurality of transmission blocks, wherein the feedback information comprises the following steps: feedback information is generated by binding the reception results of all transport blocks or binding the reception results of part of the transport blocks.

Therefore, the preset length can be determined according to the upper limit of the bearable bit number of the feedback resource or the format of the feedback channel for transmitting the feedback information and other limiting conditions, and then the feedback information with less bit number can be generated in a mode of binding all or part of the transmission block receiving results. And, the selection mode of part of the transmission blocks in the receiving result of the binding part of the transmission blocks can be determined according to the information of the priority, the time delay, the reliability, the service quality requirement, the scheduling sequence and the like of the currently transmitted data blocks.

In one possible implementation, the plurality of transport blocks includes a first transport block and a second transport block, and the feedback information includes first feedback information and second feedback information. Accordingly, generating feedback information by binding the reception result of the partial transport block includes: and generating first feedback information according to the receiving result of the first transmission block, and generating second feedback information according to the receiving result of the second transmission block. The number of the first transmission blocks or the second transmission blocks is one or more; when the number of the first transport blocks or the second transport blocks is multiple, the reception results of the multiple first transport blocks are bundled to generate first feedback information or the reception results of the multiple second transport blocks are bundled to generate second feedback information.

In one possible implementation, the priority of the first transport block is not lower than the priority of the second transport block.

In one possible implementation, the scheduling order of the first transport block precedes the scheduling order of the second transport block; wherein the scheduling order is an order in which the first device receives the plurality of transport blocks.

In a possible implementation manner, the number of the first transport blocks may be one, and specifically, the first transport block is a first scheduled transport block in at least one transport block with a highest priority among the plurality of transport blocks.

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

In one possible implementation manner, the length of the feedback information is a preset length; the partial transport blocks include at least one third transport block. Correspondingly, generating feedback information according to the receiving result of part of the plurality of transport blocks comprises: determining the number of the third transmission blocks according to the preset length; wherein, one bit of the preset length corresponds to the receiving result of one third transmission block; and generating feedback information according to the receiving results of the third transmission blocks.

For example, the preset length may 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 for transmitting the feedback information, and the number of the transmission blocks that generate the feedback information may be determined, and then the feedback information of which transmission blocks are generated may be determined according to the information of the priority, delay, reliability, quality of service requirement, or scheduling order of the transmitted data blocks, so that the feedback of the transmission blocks with high priority, delay, reliability, and quality of service requirement may be effectively ensured. Meanwhile, the size of the feedback resource is reduced, the communication requirement is further met, and the communication performance is improved.

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

In a possible implementation manner, the scheduling order of the third transport block is prior to the scheduling order of the fourth transport block, and the fourth transport block is a transport block except the third transport block among all transport blocks received by the first device.

In one possible implementation, the priority of the part of the third transport blocks is equal to the priority of the part of the fourth transport blocks, and the scheduling order of the part of the third transport blocks is prior to the scheduling order of the part of the fourth transport blocks.

In a possible implementation manner, the sending, by a first device, feedback information to a second device includes: the first device sends feedback information to the second device by using a first feedback resource, wherein the first feedback resource is as follows: and feedback resources corresponding to the latest received transmission block.

In a second aspect, the present application provides a feedback information transmission method, which may include: the second device sends a plurality of transmission blocks to the first device; the second equipment receives feedback information sent by the first equipment, wherein the feedback information is used for indicating whether the first equipment correctly receives response information of the plurality of transmission blocks; the feedback information is generated by the first device according to a first preset rule, and the first preset rule comprises: generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks; the second device sends the transport blocks that need to be retransmitted to the first device.

In a possible implementation manner, the receiving, by the second device, the feedback information sent by the first device includes: the second equipment receives the feedback information according to a second preset rule; the second preset rule includes: and according to the 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 transport block corresponding to the received feedback resource is retransmitted.

In a third aspect, the present application provides a feedback information transmission method, which may include: the method comprises the steps that a first device receives a plurality of transmission blocks sent by a second device; the first equipment generates feedback information according to the receiving results of the plurality of transmission blocks; the feedback information is used for indicating whether the first device correctly receives the acknowledgement information of the plurality of transport blocks. The first equipment determines a second feedback resource according to a second preset rule; and the first equipment sends the feedback information to the second equipment by utilizing the second feedback resource.

In a possible implementation manner, the second preset rule is: determining the feedback resource corresponding to the transmission block with the highest priority as a second feedback resource; or, the feedback resource corresponding to the first received transmission block is determined as a second feedback resource; or determining the maximum feedback resource in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the minimum feedback resource in the received feedback resources corresponding to the multiple transport blocks is determined as a second feedback resource; or, determining the feedback resource corresponding to the transport block with the largest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transport blocks as a second feedback resource; or, determining the feedback resource corresponding to the transmission block with the smallest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the feedback resources corresponding to the received multiple transport blocks are determined as the second feedback resources.

Therefore, a plurality of determination modes of the feedback resources are defined, and more possibilities are provided for system design.

In a fourth aspect, the present application provides a feedback information transmission method, which may include: the second device sends a plurality of transmission blocks to the first device; the second equipment receives feedback information sent by the first equipment, wherein the feedback information is used for indicating whether the first equipment correctly receives response information of the plurality of transmission blocks; the second device sends the transport blocks that need to be retransmitted to the first device.

In one possible implementation manner, the number of the plurality of transport blocks is less than or equal to a preset threshold, where the preset threshold is determined according to at least one of the following: configuration period of feedback resource set, format of feedback channel, size of feedback resource. The feedback resource set, i.e., the PSFCH resource, is a resource subset periodically preconfigured in a resource set at a system level and used for sending feedback information, where 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 device sending data in the resource set receives feedback information in the feedback resource set, or correspondingly, the device receiving 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 set of feedback resources.

In this way, the second device determines the preset threshold according to multiple ways, and then controls the number of transport blocks so that the first device does not need to concurrently transmit multiple PSFCHs in the same time slot, or transmits HARQ information with more than 2 bits using a sequence-based PSFCH format. The problem of PAPR increase is avoided, the performance of system operation is improved, and the complexity of system design is reduced.

In a possible implementation manner, the period for the second device to send the transport block is greater than or equal to the configuration period of the feedback resource set.

Therefore, the second device effectively avoids the problem that the second device needs to send a plurality of PSFCHs in parallel in the same time slot or send feedback information with more than 2 bits by using the PSFCH format based on the sequence, avoids the problems of power limitation and PAPR increase caused by the concurrent multiple PSFCHs, and only needs the PSFCH format based on the sequence, thereby reducing the complexity of system design.

In a fifth aspect, the present application provides a feedback information transmission apparatus, including: a processing unit and a communication unit. And the communication unit is used for receiving the plurality of transmission blocks sent by the second equipment. The processing unit is used for generating feedback information according to a first preset rule, and the first preset rule comprises: and generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks. And the communication unit is further used for sending feedback information to the second equipment, wherein the feedback information is used for indicating whether the first equipment correctly receives the response information of the plurality of transport blocks.

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

In one possible implementation, the plurality of transport blocks includes a first transport block and a second transport block; the feedback information comprises first feedback information and second feedback information; the processing unit is specifically configured to generate first feedback information according to a reception result of the first transport block, and generate second feedback information according to a reception result of the second transport block; the number of the first transmission blocks or the second transmission blocks is one or more; when the number of the first transport blocks or the second transport blocks is multiple, the reception results of the multiple first transport blocks are bundled to generate first feedback information or the reception results of the multiple second transport blocks are bundled to generate second feedback information.

In one possible implementation, the first transport block is a first scheduled transport block in at least one transport block with a highest priority among the plurality of transport blocks.

In one possible implementation, the first transport block is at least one transport block with the highest priority among the plurality of transport blocks.

In one possible implementation manner, the length of the feedback information is a preset length; the processing unit is specifically configured to determine the number of the third transport blocks according to a preset length; wherein, one bit of the preset length corresponds to the receiving result of one third transmission block; and generating feedback information according to the receiving results of the third transmission blocks.

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

In a sixth aspect, the present application provides a feedback information transmission apparatus, including: a communication unit. A communication unit for transmitting a plurality of transport blocks to a first device; the communication unit is further used for receiving feedback information sent by the first device, wherein the feedback information is used for indicating whether the first device correctly receives response information of the plurality of transport blocks; the feedback information is generated by the first device according to a first preset rule, and the first preset rule comprises: generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks; and the communication unit is also used for the second equipment to send the transmission block needing to be retransmitted to the first equipment.

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

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

In a seventh aspect, the present application provides a feedback information transmission apparatus, including: a processing unit and a communication unit. A communication unit, configured to receive a plurality of transport blocks sent by a second device; the processing unit is used for generating feedback information according to the receiving results of the plurality of transmission blocks, wherein the feedback information is used for indicating whether the first equipment correctly receives the response information of the plurality of transmission blocks; the processing unit is used for determining a second feedback resource according to a second preset rule; and the communication unit is further used for sending the feedback information to the second equipment by utilizing the second feedback resource.

In an eighth aspect, the present application provides a feedback information transmission apparatus, including: a processing unit and a communication unit. A communication unit for transmitting a plurality of transport blocks to a first device; the communication unit is used for receiving feedback information sent by the first equipment, wherein the feedback information is used for indicating whether the first equipment correctly receives response information of the plurality of transmission blocks; and the communication unit is also used for the second equipment to send the transmission block needing to be retransmitted to the first equipment.

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

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

In a ninth aspect, the present application provides an apparatus, where the feedback information transmission apparatus has a function of implementing the feedback information transmission method of any one of the above first aspects, or the feedback information transmission method of any one of the second aspects, or the feedback information transmission method of any one of the third aspects, or the feedback information transmission method of any one of the fourth aspects. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a tenth aspect, there is provided an apparatus comprising: a processor; the processor is configured to be coupled with the memory, and after reading the instruction in the memory, execute the feedback information transmission method according to any one of the first aspect, or the feedback information transmission method according to any one of the second aspect, or the feedback information transmission method according to any one of the third aspect, or the feedback information transmission method according to any one of the fourth aspect according to the instruction.

In an eleventh aspect, there is provided an apparatus comprising: a processor and a memory; the memory is configured to store computer-executable instructions, and when the feedback information transmission apparatus is operated, the processor executes the computer-executable instructions stored by the memory to cause the feedback information transmission apparatus to perform the feedback information transmission method according to any one of the first aspect, or the feedback information transmission method according to any one of the second aspect, or the feedback information transmission method according to any one of the third aspect, or the feedback information transmission method according to any one of the fourth aspect.

In a twelfth aspect, the present application provides an apparatus comprising: a processor, a memory, a bus, and a communication interface. Wherein the memory is used to store one or more programs. The one or more programs include computer-executable instructions that, when executed by the apparatus, cause the apparatus to perform the feedback information transmission method of any of the above first aspects, or the feedback information transmission method of any of the second aspects, or the feedback information transmission method of any of the third aspects, or the feedback information transmission method of any of the fourth aspects.

In a thirteenth aspect, there is provided circuitry comprising processing circuitry configured to perform the feedback information transmission method of any of the first aspects, or the feedback information transmission method of any of the second aspects, or the feedback information transmission method of any of the third aspects, or the feedback information transmission method of any of the fourth aspects as described above.

In a fourteenth aspect, a chip is provided, where the chip includes a processor, the processor is coupled to a memory, and the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, the feedback information transmission method in the first aspect is implemented, or the feedback information transmission method in the second aspect is implemented, or the feedback information transmission method in the third aspect is implemented, or the feedback information transmission method in the fourth aspect is implemented.

In a fifteenth aspect, the present application provides a computer-readable storage medium having instructions stored therein, where the instructions, when executed by a computer, cause the computer to perform 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 aspects, or the feedback information transmission method of any one of the third aspects, or the feedback information transmission method of any one of the fourth aspects.

In a sixteenth aspect, the present application provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform the feedback information transmission method of any of the above first aspects, or the feedback information transmission method of any of the second aspects, or the feedback information transmission method of any of the third aspects, or the feedback information transmission method of any of the fourth aspects.

For technical effects brought by any one of the design manners in the fifth aspect to the sixteenth aspect, reference may be made to the technical effects brought by different design manners in the first aspect to the fourth aspect, and details are not repeated here.

Drawings

Fig. 1 is a schematic diagram of a communication network structure to which a feedback information transmission method and apparatus according to an embodiment of the present disclosure are applied;

fig. 2 is a schematic diagram of a communication network structure to which a feedback information transmission method and apparatus according to an embodiment of the present disclosure are applied;

fig. 3 is a schematic hardware structure diagram of a communication device according to an embodiment of the present application;

fig. 4 is a schematic diagram of a frame structure for transmitting feedback information according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram illustrating a feedback information transmission method according to an embodiment of the present application;

fig. 6 is a schematic diagram illustrating another feedback information transmission method according to an embodiment of the present application;

fig. 7 is a first schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a feedback information transmission apparatus according to an embodiment of the present application.

Detailed Description

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.

Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

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

The method provided in the embodiment of the present application may be used in any communication system that supports communication modes such as device to device (D2D) communication, V2X communication, Machine Type Communication (MTC), machine to machine (M2M) communication, car networking communication, and communication between a network device and a terminal device, where the communication system may be a third generation partnership project (3rd generation partnership project, 3GPP) communication system, such as an LTE system, a fifth generation (5G) mobile communication system, an NR system, and other next generation communication systems, or a non-3 GPP communication system, which is not limited. The method provided by the embodiment of the present application is described below by taking the communication system shown in fig. 1 as an example. The communication system includes access network equipment, and one or more terminal devices (e.g., terminal 1 and terminal 2 in fig. 1) that communicate with the access network equipment. And a core network (not shown in fig. 1) and the like may be further included, and sidelink communication may be performed between the terminals through a PC5 interface, and a communication link between the terminals is called a Sidelink (SL). The access network device and the terminal can communicate through a Uu link.

The access network device according to the embodiment of the present application is a device deployed in a radio access network to provide a wireless communication function. Alternatively, the access network device may refer to a device that communicates with the wireless terminal through one or more cells on an air interface of the access network, where the device that implements the function of the access network device may be the access network device, or may be a device that supports the access network device to implement the function (such as a chip system in the access network device). Optionally, the access network device may perform attribute management on the air interface. The base station device may also coordinate management of attributes for the air interface. The access network device includes various forms of macro base stations, micro base stations (also referred to as small stations), relay devices such as relay stations or chips of the relay devices, Transmission Reception Points (TRPs), evolved Node bs (enbs), next generation network nodes (g Node bs, gnbs), evolved Node bs (ng-enbs) connected to next generation core networks, and the like. Or, in a distributed base station scenario, the access network device may be a Base Band Unit (BBU) and a Remote Radio Unit (RRU), and in a Cloud Radio Access Network (CRAN) scenario, the access network device may be a base band pool (BBU pool) and an RRU.

Optionally, the terminal referred to in this embodiment may be a wireless terminal, or may be a wired terminal. Including but not limited to an in-vehicle device, wearable device, computing device, chip built into a computing device, or other processing device connected to a wireless modem; cellular (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, smart phones, Personal Digital Assistants (PDA) computers, tablet computers, laptop computers, wireless modems (modem), handheld devices (handset), Wireless Local Loop (WLL) stations may also be included. The wireless terminal may also be a Subscriber Unit (SU), a Subscriber Station (SS), a mobile station (MB), a mobile station (mobile), a Remote Station (RS), a Remote Terminal (RT), a User Terminal (UT), a terminal device (UD), a User Equipment (UE), a wireless data card, a subscriber unit (subscriber unit), a Machine Type Communication (MTC) terminal (terminal), a terminal device (terminal device), a client terminal device (CPE), an Access Terminal (AT), an access Point (access Point, AP), a User Agent (UA), and the like. In the embodiment of the present application, the apparatus for implementing the function of the terminal may be the terminal, or may be an apparatus (for example, a system-on-chip in the terminal) that supports the terminal to implement the function. For convenience of description, the above-mentioned devices are collectively referred to as a terminal in this application.

The terminal 1 and the terminal 2 may communicate directly on a Sidelink (SL), and the terminal device may be a device in a vehicle to any thing (V2X) system as shown in fig. 2, a device in a device to device (D2D) system, a device in a road semi-automatic lane charging system (MTC), or the like. Among them, the communication in the form of V2X may include, for example, vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to network (V2N) communication, vehicle to pedestrian (V2P) communication, etc., and may 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 the above-mentioned SL direct communication may be a resource pool configured by the network device, such as a resource pool used when the terminals 1 and 2 are connected to the air interface of the access network device normally, or may be a resource pool preconfigured in the terminals 1 and 2, such as a resource pool configured in the terminal device by the device manufacturer in advance according to a protocol specification before the terminal device leaves the factory.

Besides the sidelink SL, the direct communication between the terminal devices may also use other forms or names of wireless connection, such as a future wireless communication system, for example, a 6G system, and a wireless connection used for the direct communication between the terminal devices, which is not limited in this application.

The feedback information transmission method provided by the embodiment of the application is applied to a communication process between two devices, and can be used for communication between a network device and a terminal device, communication between the terminal device and the terminal device, and communication between the network device and the network device. The terminal equipment and the network equipment can communicate through a Uu port link. The Uu port link may be divided into an Uplink (UL) and a Downlink (DL) according to a direction of data transmitted thereon, where the UL may transmit data transmitted from the terminal device to the network device, and the DL may transmit data transmitted from the network device to the terminal device. The network device may be an access network device, etc.

Optionally, the terminal and the access network device in this embodiment may be implemented by different devices. For example, the terminal and the access network device in the embodiment of the present application may be implemented by the communication device in fig. 3. Fig. 3 is a schematic diagram illustrating a hardware structure of a communication device according to an embodiment of the present application. The communication device 300 includes at least one processor 301, communication lines 302, memory 303, and at least one communication interface 304. Wherein the memory 303 may also be comprised 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 ics for controlling the execution of programs in accordance with the present disclosure.

The communication link 302 may include a path for transmitting information between the aforementioned components.

A communication interface 304 for communicating 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 apparatuses capable of implementing a communication function, and is used for communicating with other devices. Optionally, when the communication interface is a transceiver, the transceiver may be a stand-alone transmitter operable to transmit information to other devices, and the transceiver may also be a stand-alone receiver operable to receive information from other devices. The transceiver may also be a component that integrates information sending and receiving functions, and the embodiment of the present application does not limit the specific implementation of the transceiver.

The memory 303 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 302. The memory may also be integral to the processor.

The memory 303 is used for storing computer-executable instructions for implementing the scheme of the present application, and is controlled to execute by the processor 301. The processor 301 is configured to execute the computer-executable instructions stored in the memory 303, so as to implement the feedback information transmission method provided by the following embodiments of the present application.

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

In particular implementations, processor 301 may include one or more CPUs such as CPU0 and CPU1 in fig. 3, for example, as an example.

In particular implementations, communication device 300 may include multiple processors, such as processor 301 and processor 307 in fig. 3, for one embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, communication device 300 may also include an output device 305 and an input device 306, as one embodiment. The output device 305 is in communication with the processor 301 and may 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, a projector (projector), or the like. The input device 306 is in communication with the processor 301 and may 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 sensing device, among others.

The 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 access network device may be a device having a similar structure as in fig. 3.

For ease of understanding, the technical terms related to the embodiments of the present application are described:

(1) feedback information:

and the response information is used for indicating whether the receiving end correctly receives the transmission block sent by the sending end. In the embodiment of the present application, the feedback information mainly refers to HARQ information. The receiving end generates 1bit HARQ information every time the receiving end receives 1 Transport Block (TB), and the receiving end sends the 1bit HARQ information to the sending end to indicate whether the TB sent by the sending end is correctly received by the receiving end. In addition, the sending end determines that the receiving end does not correctly receive the TB, and can retransmit the TB to the receiving end, wherein the retransmitted TB is formed by adding a part of redundant bits on the basis of original data and then sending the redundant bits to the receiving end. If the receiving end can not decode successfully, the retransmission is carried out again, the redundant bits are continuously increased along with the increase of the retransmission times, and the channel coding rate is continuously reduced, so that the receiving end can obtain better decoding effect.

Illustratively, a sending end sends a TB to a receiving end, if the receiving end correctly receives the TB, 1-bit ACK is fed back to the sending end to indicate the receiving end to correctly receive the TB; and if the receiving end does not correctly receive the TB, feeding back 1-bit NACK to the transmitting end to indicate that the receiving end does not correctly receive the TB. After receiving NACK from the receiving end, the transmitting end may also retransmit the TB to the receiving end. The receiving end receives the TB sent by the sending end and can decode the TB successfully, and if the receiving end loses the TB or receives the TB but the decoding fails, the receiving end fails to receive the TB correctly.

It should be noted that, in the embodiment of the present application, 1-bit NACK or 1-bit ACK may be referred to as HARQ information. Illustratively, 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 (PSCCH):

the PSCCH is a control channel for sidelink communications between terminals for the transmission of control signaling.

The psch is a data channel for sidestream communication between terminals for transmitting data.

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

(3) Sequence-based PSFCH:

the sequence-based PSFCH format using 1 symbol is supported in NR V2X. And a starting point with sequence-based PUCCH format 0 as a reference. Based on PUCCH format 0 of the sequence, 1-2 bits may be carried, where ACK/NACK of 1bit is distinguished by different sequence cyclic shifts (e.g., a sequence cyclic shift of 0 indicates NACK, and a sequence cyclic shift of 6 indicates ACK. The 2-bit ACK/NACK is distinguished by different sequence cyclic shifts (e.g., a sequence cyclic shift of 0 indicates { NACK, NACK }, a sequence cyclic shift of 3 indicates { NACK, ACK }, a sequence cyclic shift of 6 indicates { ACK, ACK }, and a sequence cyclic shift of 9 indicates { ACK, NACK }.

(4) And (3) feedback resources:

in the embodiment of the present application, the feedback resource is a time-frequency resource used for sending feedback information, and the feedback resource is a subset of a pre-configured PSFCH resource. Wherein, the PSFCH resource is a feedback resource set. And if the feedback information is HARQ information, the time-frequency resource occupied by the transmission of the HARQ information is the feedback resource. The feedback resources include time domain resources and frequency domain resources, the time domain resources refer to symbols used for transmitting the PSFCH, and the frequency domain resources refer to subchannels occupied by transmitting the PSFCH. In the embodiment of the present application, the slot for transmitting the PSFCH is described as a PSFCH slot. The PSFCH resources are typically pre-configured in the receiving device at a certain periodicity.

In one possible implementation, there is an implicit association between the PSCCH time slot and the time slot in which the PSCCH/PSCCH is transmitted. Illustratively, a fixed time interval K is used between the psch and the PSFCH, where K represents the processing capability of the terminal, i.e., the time taken for the terminal to receive the psch until generating HARQ information does not exceed the time interval K. For example, if the terminal transmits the pscch in slot n, the terminal may transmit the PSFCH in slot n + K or the first slot after slot n + K where the PSFCH resource exists. For example, assuming that the time interval K between the PSCCH and the PSFCH is 2, assuming that the PSCCH is transmitted in time slot n, the terminal may transmit the PSFCH in the first time slot in which the PSFCH resource exists in time slots n +2, n +3 ….

For example, referring to fig. 4, it is assumed that one PSFCH resource is configured every 4 slots, i.e., N is 4, and the time interval K is 1. The transmitting end (device 2) transmits TB1 on slot 3(n ═ 3), and slot 4(n + K ═ 3+1 ═ 4) is the earliest slot that can feed back PSFCH. But no PSFCH resources are available on slot 4, so no feedback information can be sent on slot 4. If the first time slot after time slot n + K where the PSFCH resource exists is time slot 7, the receiving end (device 1) may send feedback information corresponding to TB1 on time slot 7.

Further, when the transmitting end transmits a transmission block, the transmitting end occupies time domain resources and frequency domain resources respectively. For example, referring to fig. 4, a transmitting end (device 2) sends a transport block (TB1) to a receiving end (device 1), where the occupied time domain resource is time slot 3 and the frequency domain resource is sub-channel 2, and thus, in a possible implementation manner, when the receiving end sends feedback information to the transmitting end, the receiving end sends the feedback information on sub-channel 2 of time slot 7, that is, each transport block sent by the transmitting end is associated with a time-frequency position of a corresponding feedback resource.

Similarly, referring to fig. 4, slot 5 and slot 6 do not have PSFCH resources and slot 7 does. Then, the transmitting end transmits a transport block TB2 to the receiving end on subchannel 1 of time slot 4, time slot 5 is the earliest time slot that can feed back the PSFCH but has no available PSFCH resource, and the receiving end can transmit feedback information corresponding to TB2 on subchannel 1 of time slot 7; a transmitting end transmits a transport block TB3 to a receiving end in a sub-channel 3 of a time slot 5, wherein the time slot 6 is the earliest time slot which can feed back a PSFCH but has no available PSFCH resource, and the receiving end can transmit feedback information corresponding to the TB3 on the sub-channel 3 of a time slot 7; the transmitting end transmits a transport block TB4 to the receiving end on sub-channel 3 of slot 6, the slot 7 has PSFCH resources, and the receiving end can transmit feedback information corresponding to TB4 on sub-channel 3 of slot 7. It can be seen that the slot 7 is a slot in which PSFCH resources exist in the slot n + K or the first slot after the transmission of the TBs 1-4, and then the feedback information correspondingly generated by the TBs 1-4 needs to be transmitted in the slot 7. However, the time slots of the feedback PSFCHs corresponding to the multiple transport blocks are the same time slot, that is, the receiving end needs to send multiple PSFCHs to the sending end on the same time slot. At this time, if a plurality of feedback channels are transmitted in parallel, a problem of power limitation is caused, which affects transmission quality. If multiple pieces of feedback information are multiplexed together for feedback, the bit number of the feedback information is larger than the sequence-based PSFCH bearer upper limit, and the feedback information transmission fails. Therefore, in order to solve the above problem, embodiments of the present application provide a method and an apparatus for transmitting feedback information.

The feedback information transmission method provided by the embodiment of the application comprises feedback information sending and feedback information receiving. In this embodiment, the receiving end is a first device, the transmitting end is a second device, the first device generates and transmits feedback information, and the second device receives and analyzes the feedback information. The first device and the second device may be terminal devices, or components of terminal devices (such as a system on chip of the terminal device), or access network devices, or components of access network devices (such as a system on chip), or other devices with communication functions. The receiving end supports the software and hardware processing capability of the HARQ, i.e. various HARQ capabilities referred to in the prior art.

In the embodiment of the present application, it is described by taking an example that the first device needs to feed back HARQ information of multiple (more than two) transport blocks in one timeslot where the PSFCH resource exists, at this time, if a method for generating feedback information in the prior art is adopted, a problem that the feedback information cannot be sent using the sequence-based PSFCH is caused.

As shown in fig. 5, a method for transmitting feedback information provided in the embodiment of the present application may include S101 to S104:

s101, the first device receives a plurality of transmission blocks sent by the second device.

When the first device receives the plurality of transport blocks sent by the second device, the first device decodes the received plurality of transport blocks. Further, the first device generates feedback information according to the decoding result to reflect the condition that the first device receives the transmission block.

S102, the first equipment generates feedback information according to a first preset rule.

The first device generates feedback information according to the receiving result of the transport blocks, wherein the feedback information is response information (ACK/NACK) of whether the first device correctly receives the transport blocks. After the first device sends the feedback information to the second device, the second device can know the receiving state of the transmission block sent by the second device according to the feedback information, and further determine whether the transmission block needs to be retransmitted or not and determine which transmission blocks need to be retransmitted.

Wherein, the first preset rule comprises: and generating feedback information in a bundling (bundling) mode according to the receiving results of the plurality of transport blocks, or generating feedback information according to the receiving results of part of the transport blocks in the plurality of transport blocks.

In addition, in order to satisfy the limitation of the feedback resource size or the number of bits used for carrying the PSFCH format based on the sequence, 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 bits used for carrying the PSFCH based on the sequence. The current sequence-based PSFCH format, in which the NR V2X system supports one symbol, can support 1-2 bits, so that the preset length is 1bit or 2 bits in the NR V2X system. Of course, when the bit value that can be supported by the subsequent PSFCH format changes, the preset length also changes.

Further, the above-mentioned generating the feedback information by the binding mode means that the first device combines the reception results corresponding to each transport block in the transport blocks determined to need binding together to perform a logical AND operation to generate final feedback information. For example, referring to fig. 4, when the first device receives four transport blocks sent by the second device, assuming that TB1 is successfully received, TB2 is successfully received, TB3 is successfully received, AND TB4 is unsuccessfully received, at this time, the first device generates feedback information by binding the reception results of TB1 AND TB2 therein, AND performs a logical AND operation on the reception results corresponding to TB1 AND TB2, at this time, the result is successful reception, so that finally the feedback information corresponding to TB1 AND TB2 is ACK, AND corresponds to 1bit "1". If the feedback information is generated by binding the reception results of TB3 AND TB4, the reception results corresponding to TB3 AND TB4 are logically AND-anded, AND the result is reception failure, so that the feedback information corresponding to TB3 AND TB4 is finally NACK, AND corresponds to 1bit "0".

In a possible implementation manner, generating feedback information by means of bundling according to the reception results of the plurality of transport blocks includes: feedback information is generated by binding the reception results of all transport blocks or binding the reception results of part of the transport blocks.

Optionally, the feedback information is generated by binding the reception results of all transport blocks. In this implementation manner, the first device combines all the received results of the received transport blocks together to perform a logical AND operation, AND only if the received results of all the received transport blocks are ACK, the finally generated feedback information can be ACK. If the reception result of any one of the transport blocks is NACK, the finally generated feedback information is NACK. Illustratively, referring to fig. 4, the first device (device 1) receives 4 transport blocks, TB1, TB2, TB3 and TB4, which are sequentially scheduled by the second device (device 2) from slot 3 to slot 6 in chronological order. Then, at this time, only the reception results of the 4 transport blocks are all ACK, and the final feedback information is ACK; the reception result of any one transport block is NACK, and the final feedback information is NACK.

In the foregoing implementation manner, the first device generates a feedback information, where the feedback information is only an ACK or NACK, that is, the length of the feedback information is 1bit, and the feedback information may be fed back by using a sequence-based PSFCH.

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

In the foregoing implementation manner, the first device generates a feedback message, where the feedback message includes two parts, each of which is an ACK or a NACK, that is, the length of the feedback message is 2 bits, and the feedback message may be fed back by using a sequence-based PSFCH.

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

Illustratively, the first transport block and the second transport block may be determined according to the following scheme. Referring to fig. 4, four transport blocks are transmitted, assuming a scheduling order of TB1 > TB2 > TB3 > TB 4.

Scheme 1: and determining a first transmission block and a second transmission block according to the priority of the received transmission block, wherein the priority of the first transmission block is not lower than that of the second transmission block.

Optionally, at least one transport block with the highest priority among the received multiple transport blocks is determined as a first transport block, the remaining transport blocks are determined as second transport blocks, and all the first transport blocks have higher priorities than all the second transport blocks.

For example, referring to fig. 4, it is assumed that the priority of the received four transport blocks is TB1 ═ TB2 > TB4 > TB 3. Then, the transport block with the highest priority has two TBs 1 and 2, and thus TB1 and TB2 are determined as the first transport block and TB3 and TB4 are determined as the second transport block. The first device generates first feedback information by binding the reception results of the TB1 and the TB2, and generates second feedback information by binding the reception results of the TB3 and the TB 4. The generated feedback information is seen in table 1A below.

TABLE 1A

Referring to table 1A, ACK is "1" and NACK is "0". In this scheme, 4 kinds of HARQ information, "00", "01", "10", and "11" are generated. When the first device does not correctly receive any one of TB1 and TB2, the bundled first feedback information corresponding to TB1 and TB2 is 0, and when the first device does not correctly receive any one of TB3 and TB4, the bundled second feedback information corresponding to TB3 and TB4 is 0, so that 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 bundled first feedback information corresponding to TB1 and TB2 is 0, and when the first device correctly receives TB3 and TB4, the bundled second feedback information corresponding to TB3 and TB4 is 1, so that the HARQ information sent by the first device to the second device is "01". When the first device correctly receives TB1 and TB2, the bundled first feedback information corresponding to TB1 and TB2 is 1, and when the first device does not correctly receive any one of TB3 and TB4, the bundled second feedback information corresponding to TB3 and TB4 is 0, so that the HARQ information sent by the first device to the second device is "10". When the first device correctly receives TB1 and TB2, the bundled first feedback information corresponding to TB1 and TB2 is 1, and when the first device correctly receives TB3 and TB4, the bundled second feedback information corresponding to TB3 and TB4 is 1, and therefore, the HARQ information sent by the first device to the second device is "11".

It should be noted that, the second device sends the transport blocks to the first device, and the second device serving as the sending end can learn the priorities and the scheduling order of the multiple transport blocks that are sent. After receiving the transport block, the first device may obtain information for analyzing the transport block according to Sidelink Control Information (SCI) of the transport block, for example, may obtain a priority of the received transport block, and in a possible implementation, determine the priority of the transport block according to a priority and/or quality of service (QoS) field included in a control signaling for scheduling the transport block. Or the receiving end selects another way to determine the priority of the received transport block, which is not specifically limited in the embodiment of the present application.

In addition, during the transmission process, the transmission block may be lost, and 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 SCIs. For example, the transmitting end sends four transport blocks TB1-TB4 to the receiving end, and the SAI fields in the corresponding SCIs are 1, 2, 3, and 4, respectively (assuming that the SAI field is 2 bits, 4 states can be indicated). Assuming that the receiving end loses TB2 sent by the transmitting end (the SAI field in SCI is 2), after receiving TB1(SAI equals 1) and TB3(SAI equals 3), the receiving end knows that it has lost one TB, and the HARQ information corresponding to the corresponding TB2 is NACK. However, since the receiving end cannot know the total number of the transport blocks sent by the sending end, when the last continuous transport block or blocks sent are lost, the receiving end may consider the last received transport block as the last transport block sent by the sending end. In fact, the receiving end cannot know that the transmission block sent by the subsequent sending end is lost.

For example, referring to fig. 4, the transmitting end sends 4 transport blocks, and it is assumed that the receiving end receives only three transport blocks TB1-TB3 and loses TB4, that is, the last scheduled TB, at this time, the receiving end may know the scheduling order of the received transport blocks according to SAI, but does not know SCI of missed TB 4. Then the receiving end considers the received TB3 to be the last transport block, so only feedback information corresponding to the received three transport blocks is sent.

Referring to table 1A, assuming TB4 is not lost, the first device can learn that the transport block is lost when at least one of TBs 1/2/3 is lost. When a transport block is lost, since the SCI of the lost transport block cannot be known, the priority of the lost transport block cannot be determined. Then, the priority order judged by the receiving end is not uniform with the sending end, so that the two parties are confused. For example, referring to fig. 4, the transmitting end sends four transport blocks TB1, TB2, TB3 and TB4 to the receiving end, and the receiving end loses TB2, so that the receiving end (first device) cannot know the priority ranking of the lost transport blocks in the received transport blocks, and at this time, if the receiving end only ranks the priorities of the received transport blocks as TB1 > TB4 > TB 3. Therefore, when a transport block is lost, the knowledge of the transmission-reception duplex on the priority ordering of the transport blocks is different, for example, at this time, the receiving end considers that the number of the transport blocks with the highest priority is 1, that is, TB1, and determines this transport block as the first transport block to determine the first feedback information, and actually, the transport blocks with the highest priority are 2 TBs 1 and TB2 (the priority ordering is TB1 ═ TB2 > TB4 > TB3), and the first feedback information should be generated by binding the reception results of the TBs 1 and TB 2. Therefore, when a transport block is lost, both parties can be confused. Therefore, in table 1A, when any one of TB1, TB2, and TB3 is lost, feedback information "00" is generated, i.e., the transport block cannot be correctly received this time. That is, when the receiving end finds that a part of the transport blocks are lost, in the scheme of determining the first transport block and the second transport block by using the priority, it needs to feed back "00" to the sending end to inform the sending end that the transmission blocks cannot be correctly received at this time and need to retransmit all the transmitted transport blocks.

Optionally: and determining the transport block with the highest priority and scheduled first among the received transport blocks as a first transport block, and determining the rest transport blocks as second transport blocks.

For example, referring to fig. 4, it is assumed that the priority of the received four transport blocks is TB2 ═ TB4 > TB3 > TB1, the scheduling order is TB1 > TB2 > TB3 > TB4, and the receiving end receives TB 4. Then the highest priority transport block has two TBs 2 and 4, and at this time, according to the scheduling order TB2 > TB4, TB2 is determined to be the first transport block, that is, TB2 is the highest priority and first scheduled transport block among the received transport blocks, and TB1, TB3, and TB4 are determined to be the second transport 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 TB 4. The generated feedback information is seen in table 2A below.

TABLE 2A

Referring to table 2A, ACK is "1" and NACK is "0". In this scheme, 4 kinds of HARQ information, "00", "01", "10", and "11" are generated. When the first device does not correctly receive TB2, the corresponding first feedback information is 0, and when the first device does not correctly receive any one of TB1, TB3, and TB4, the bundled second feedback information corresponding to TB1, TB3, and TB4 is 0, so that the HARQ information sent by the first device to the second device is "00". When the first device does not correctly receive TB2, the corresponding first feedback information is 0, and when the first device correctly receives TB1, TB3, and TB4, the bundled second feedback information corresponding to TB1, 3, and 4 is 1, so that the HARQ information sent by the first device to the second device is "01". When the first device correctly receives TB2, the corresponding first feedback information is 1, and when the first device does not correctly receive any one of TB1, TB3, and TB4, the bundled second feedback information corresponding to TB1, TB3, and TB4 is 0, so that the HARQ information sent by the first device to the second device is "10". When the first device correctly receives TB2, its corresponding first feedback information is 1, and when the first device correctly receives TB1, TB3 and TB4, the bundled second feedback information corresponding to TB1, 3 and 4 is 1, so the HARQ information sent by the first device to the second device is "11".

Optionally, the transport block with the higher priority is determined to be the first transport block, and the remaining transport blocks are determined to be the second transport blocks. The priority of part of the transmission blocks in the first transmission block is equal to the priority of part of the transmission blocks in the second transmission block, and the scheduling sequence of the part of the transmission blocks in the first transmission block is prior to the scheduling sequence of the part of the transmission blocks in the second transmission block.

For example, referring to fig. 4, it is assumed that a transmitting end transmits 4 transport blocks, a priority is TB3 > TB1 ═ TB4 > TB2, a scheduling order is TB1 > TB2 > TB3 > TB4, and a receiving end receives TB 4. In this case, it is specified that two transport blocks having a higher priority are determined as the first transport block, and the remaining transport blocks are determined as the second transport block. Since the scheduling order of TB1 precedes TB4, the first transport blocks are TB3 and TB1, and the second transport blocks are TB4 and TB 2. The first device generates first feedback information by binding the reception results of the TB1 and the TB3, and generates second feedback information by binding the reception results of the TB2 and the TB 4. The generated feedback information is seen in table 3A below.

TABLE 3A

Scheme 2: and determining a part of the received transport blocks scheduled earlier as a first transport block and determining the rest transport blocks as a second transport block.

Optionally, one of the received transport blocks scheduled first is a first transport block, and the remaining transport blocks are second transport blocks. Then, the receiving result of the first scheduled transport block is the first feedback information, and the first device generates the second feedback information by binding the receiving results of the remaining transport blocks.

For example, referring to fig. 4, the scheduling order TB1 > TB2 > TB3 > TB4, the first scheduled TB1 is the first transport block, and TB2, TB3, and TB4 are the second transport blocks. The first device generates first feedback information according to the reception result of TB1 and generates second feedback information by bundling the reception results of TB2, TB3, and TB4, that is, the second feedback information is NACK as long as one of TB2, TB3, and TB4 has a reception result of NACK. The generated feedback information is seen in table 4A below.

TABLE 4A

Feedback state corresponding to HARQ information	HARQ
		At least one NACK in TB1NACK + TB2/3/4	00
TB1NACK + TB2/3/4 all ACKs	01
		At least one NACK in TB1ACK + TB2/3/4	10
TB1ACK + TB2/3/4 all ACK	11

Optionally, a plurality of transport blocks scheduled earlier in the received transport blocks are determined as first transport blocks, and the remaining transport blocks are determined as second transport blocks. Then, the first device generates first feedback information by binding reception results of the first scheduled transport blocks, and generates second feedback information by binding reception results of the remaining transport blocks.

Illustratively, two transport blocks scheduled earlier in the received transport blocks are first transport blocks, and the remaining transport blocks are second transport blocks. Referring to fig. 4, the scheduling order TB1 > TB2 > TB3 > TB4, and then TB1 and TB2 are determined as first transport blocks and TB3 and TB4 are determined as second transport blocks. The first device generates the first feedback information by binding the reception results of TB1 and TB2, that is, the first feedback information is failed as long as one of TB1 and TB2 fails, and the first device generates the second feedback information by binding the reception results of TB3 and TB4, that is, the second feedback information is failed as long as one of TB3 and TB4 fails. The generated feedback information is seen in table 5A below.

TABLE 5A

It should be noted that, in the above example, an example of determining one or two transport blocks scheduled earlier as a first transport block is taken as an example for description, it is understood that a plurality of transport blocks scheduled earlier are determined as the first transport block, and the number of the plurality of transport blocks may be determined according to an actual scenario, for example, may be 3, 4 or more, and this embodiment of the present application is not limited specifically.

In one possible implementation, the feedback information is generated according to a reception result of a part of the received transport blocks. In order to satisfy that the length of the last feedback information is a preset length, that is, the finally generated feedback information may be sent using a sequence-based PSFCH or limited by the size of the feedback resource, therefore, the number of the third transport blocks may be determined according to the preset length, the feedback information may be generated according to the third transport blocks, and the remaining transport blocks are used as the fourth transport blocks, so that it is not necessary to generate the feedback information. Each bit of the preset length corresponds to a receiving result of one third transmission block, namely the number of bits of the preset length is equal to the number of the third transmission blocks. And, the partial transport block includes at least one third transport block.

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

Scheme 1: and determining a third transmission block and a fourth transmission block according to the priority of the received transmission blocks, wherein the priority of the third transmission block is not lower than that of the fourth transmission block.

Optionally, the number of the third transport blocks is 1, the number of the fourth transport blocks is multiple, and the priority of the third transport block is higher than the priority of the fourth transport block.

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

TABLE 6A

It should be noted that table 6A assumes that TB4 is not lost, then when any one of TB1, TB2, and TB3 is lost, the receiving end can know the loss of the three transport blocks, and since the receiving end cannot know the priority of the lost transport block, the receiving end will generate feedback information "00", that is, the receiving end cannot correctly receive the transport block this time.

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

For example, referring to fig. 4, it is assumed that the priority order is TB2 > TB1 > TB4 > TB3, the bearer cap of the feedback resource is 2 bits or the PSFCH format bearer cap based on the sequence is 2 bits, so 1 or 2 transport blocks may be selected as the third transport block in this scheme, and for a scenario in which a plurality of transport blocks with higher priority are currently used as the third transport block, the two transport blocks with the highest priority, TB1 and TB2, are used as the third transport block, and then TB3 and TB4 are used as the fourth transport block. The generated feedback information is seen in table 7A below.

TABLE 7A

It should be noted that table 7A assumes that TB4 is not lost, then when any one of TB1, TB2, and TB3 is lost, the receiving end can know the loss of the three transport blocks, and since the receiving end cannot know the priority of the lost transport block, the receiving end will generate feedback information "00", that is, the receiving end cannot correctly receive the transport block this time.

Optionally, the priority of the third transport block is not lower than the priority of the fourth transport block. That is, there is a portion of the third transport blocks having a priority equal to the priority of a portion of the fourth transport blocks, and the portion of the third transport blocks has a scheduling order that precedes the scheduling order of the portion of the fourth transport blocks.

For example, referring to fig. 4, it is assumed that the priority order of transmitting 4 transport blocks by the transmitting end is TB2 ═ TB1 ═ TB4 > TB3, the scheduling order is TB1 > TB2 > TB3 > TB4, and the receiving end receives TB 4. At this time, since the length of the feedback information needs to be determined according to the upper limit of the bearer of the feedback resource or the upper limit of the PSFCH format bearer based on the sequence, the number of the third transport blocks is further determined. I.e. the number of third transport blocks is at most 2. Since the scheduling order of TB1 is first with TB4, when it is determined that the third transport block number is 2, then the third transport blocks are TB1 and TB 2. The generated feedback information is seen in table 8A below.

TABLE 8A

It should be noted that table 8A assumes that TB4 is not lost, then when any one of TB1, TB2, and TB3 is lost, the receiving end can know the loss of the three transport blocks, and since the receiving end cannot know the priority of the lost transport block, the receiving end will generate feedback information "00", that is, the receiving end cannot correctly receive the transport block this time.

Scheme 2: and determining a part of the received transport blocks with an earlier scheduling order as a third transport block and determining the rest of the received transport blocks as a fourth transport block.

Optionally, the number of the third transport blocks is 1, the number of the fourth transport blocks is multiple, and the scheduling order of the third transport blocks is prior to the scheduling order of the fourth transport blocks.

For example, referring to fig. 4, the first scheduled transport block TB1 is used as the third transport block, and the reception result of the first scheduled transport block corresponds to the final feedback information, which generates 1-bit HARQ feedback information, so that the sequence-based PSFCH can be used for transmission. The feedback information generated is shown in table 9A below.

TABLE 9A

HARQ information corresponding feedback status	HARQ
		TB1 NACK	0
TB1ACK	1

Optionally, the number of the third transport blocks is multiple, and the number of the fourth transport blocks is multiple. The scheduling order of all third transport blocks precedes the scheduling order of all fourth transport blocks.

For example, referring to fig. 4, the bearer cap of the current feedback resource or the sequence-based PSFCH format bearer cap is 2 bits, so 1 or 2 transport blocks may be selected to be determined as the third transport block in the scheme, and for the scenario where a plurality of transport blocks with a scheduling order prior are currently determined as the third transport block, two transport blocks with a scheduling order prior, TB1 and TB2, are determined as the third transport block, and then TB3 and TB4 are determined as the fourth transport block. The generated feedback information is seen in table 10A below.

TABLE 10A

HARQ information corresponding feedback status	HARQ
		TB1NACK+TB2NACK；	00
TB1NACK+TB2ACK	01
		TB1ACK+TB2NACK	10
TB1ACK+TB2ACK	11

S103, the first equipment sends feedback information to the second equipment.

Specifically, the first device may send the feedback information generated in step S102 to the second device by using the first feedback resource, where each transport block corresponds to one feedback resource according to the foregoing, and then the transceiver and the receiver determine to perform feedback and reception on the same feedback resource, so that the feedback information may be successfully transmitted.

Then, since the last consecutive transport block or blocks transmitted by the transmitting end are lost, the receiving end cannot know about the loss. Therefore, to address this problem, a rule may be formulated to specify that the receiving end sends feedback information at a feedback resource corresponding to the latest received transport block, and the sending end receives the feedback information in sequence from the feedback resource corresponding to the latest sent transport block to the feedback resource corresponding to the first scheduled transport block until the feedback information is received. Then, the second device may determine whether the first device loses the last scheduled partial transport block, and if no transmission information is received at the corresponding feedback resource, it indicates that the transport block corresponding to the feedback resource is lost, and needs to retransmit the transport block corresponding to the feedback resource.

For example, referring to fig. 4, assuming that TB4 is lost, the receiving end considers TB3 as the latest scheduled transport block and sends feedback information at the feedback resource corresponding to TB 3. Then, the sending end receives the feedback resource corresponding to the latest-sent transport block TB4, and at this time, does not receive the feedback information, and then the sending end knows that the receiving end has lost the TB4 (does not receive), and then the sending end receives the feedback resource corresponding to the latest-scheduled transport block to the feedback resource corresponding to the first-scheduled transport block in sequence from the feedback resource corresponding to the latest-scheduled transport block until the feedback information is received, so that the sending end can know the transport block lost by the receiving end, and then determines the transport block to be retransmitted according to the received feedback information.

If the received feedback information contains NACK, retransmission of a transmission block corresponding to the NACK information is required. If the detected feedback information contains the ACK, the transmission block corresponding to the ACK information does not need to be retransmitted.

And S104, the second equipment sends the transmission block needing to be retransmitted to the first equipment.

In a possible implementation manner, if the feedback information is the feedback information generated by the first device by binding the reception results of all the transport blocks. Then, when the feedback information indicates that the transmission block reception fails, i.e. the acknowledgement information is NACK (0), all the transmission blocks sent by the second device to the first device need to be retransmitted.

In a possible implementation manner, if the feedback information is generated by the first device by binding the reception result of the partial transport block, and the feedback information includes first feedback information and second feedback information, if the first feedback information is generated by binding according to the reception result of the plurality of first transport blocks and the first feedback information indicates that the transport block reception fails, the transport block to be retransmitted is the plurality of first transport blocks; and if the second feedback information is generated according to the binding of the receiving results of the second transport blocks and indicates that the transport blocks are failed to be received, the transport blocks needing to be retransmitted are a plurality of second transport blocks. If the first feedback information or the second feedback information is generated according to the receiving result of the single transport block, the transport block needing to be retransmitted is the single transport block.

For example, referring to fig. 4, different transport blocks to be retransmitted are determined according to different scenarios generated by the feedback information in step S102. The following tables 1B, 2B, 3B, 4B, and 5B may respectively identify different transport blocks requiring retransmission corresponding to the above tables 1A, 2A, 3A, 4A, and 5A.

TABLE 1B

TABLE 2B

TABLE 3B

TABLE 4B

TABLE 5B

It should be noted that, in the above tables 1B, 2B and 3B, all of the scenarios are that the latest scheduled partial transport block is not lost, and if the latest scheduled transport block is lost, any feedback information is received, and the lost latest scheduled partial transport block needs to be retransmitted. For example, assuming that the latest scheduled transport block TB4 is lost in fig. 4, the following tables 1C, 2C, 3C, 4C and 5C may respectively correspond to the above tables 1A, 2A, 3A, 4A and 5A to determine different transport blocks requiring retransmission.

TABLE 1C

TABLE 2C

TABLE 3C

TABLE 4C

Response message	HARQ	Transport block requiring retransmission
			At least one NACK in TB1NACK + TB2/3	00	TB1、TB2、TB 3、TB 4
TB1NACK + TB2/3 all ACK	01	TB1、TB 4
			TB1ACK+At least one NACK in TB2/3	10	TB2、TB 3、TB 4
TB1ACK + TB2/3 all ACK	11	TB 4

TABLE 5C

Response message	HARQ	Transport block requiring retransmission
			TB1/2 at least one NACK + TB3NACK	00	TB1、TB2、TB 3、TB 4
TB1/2 at least one NACK + TB3ACK	01	TB1、TB2、TB 4
			TB1/2ACK+TB3NACK	10	TB 3、TB 4
TB1/2ACK+TB3ACK	11	TB 4

In a possible implementation manner, if the feedback information is generated according to the reception result of the partial transport block, when the first bit of the feedback information indicates that the transport block is failed to be received, it is determined that the transport blocks that need to be retransmitted are the third transport block and the fourth transport block corresponding to the first bit. That is, when the feedback information is failed, it is necessary to retransmit the transport block corresponding to the failure response and all the transport blocks except the transport block generating the feedback information.

For example, referring to fig. 4, different transport blocks to be retransmitted are determined according to different scenarios generated by the feedback information in step S102. Table 6B, table 7B, table 8B, table 9B, and table 10B below may respectively determine different transport blocks requiring retransmission corresponding to table 6A, table 7A, table 8A, table 9A, and table 10A above.

TABLE 6B

TABLE 7B

TABLE 8B

TABLE 9B

Response message	HARQ	Need to make sure thatRetransmitted transport block
			TB1NACK	0	TB1、TB2、TB 3、TB 4
TB1ACK	1	TB2、TB 3、TB 4

TABLE 10B

Response message	HARQ	Transport block requiring retransmission
			TB1NACK+TB2NACK；	00	TB1、TB2、TB 3、TB 4
TB1NACK+TB2ACK	01	TB1、TB 3、TB 4
			TB1ACK+TB2NACK	10	TB2、TB 3、TB 4
TB1ACK+TB2ACK	11	TB 3、TB 4

After determining the transport blocks needing to be retransmitted, the second device adds a part of redundant bits to the coded bits of the transport blocks and then retransmits the coded bits to the first device so as to reduce the channel coding rate, so that the first device can obtain better decoding effect.

In the feedback information transmission method provided by the embodiment of the application, the receiving end generates the feedback information by binding the receiving result of the received transport block, or generates the feedback information according to the receiving result of part of the received transport blocks. And then the resources that the effective reduction feedback information occupies to the system can only support the effective work of feedback channel format based on sequence, has reduced the complexity of system design. Compared with the prior art that the bit number of the feedback information transmitted by using the sequence-based PSFCH format is limited, and HARQ information corresponding to each transport block cannot be transmitted, in the embodiment of the present application, feedback information with a smaller bit number can be generated by using a first preset rule, and transmission can be performed by using a sequence-based feedback channel.

An embodiment of the present application provides a feedback information transmission method, as shown in fig. 6, the method may include S201 to S204:

s201, the first device receives a plurality of transmission blocks sent by the second device.

In a possible implementation manner, the number of the plurality of transport blocks transmitted by the second device may be determined according to a bearer upper limit of a feedback resource used for transmitting HARQ information of the plurality of transport blocks, or a maximum of 2 bits of feedback information that can be carried using a sequence-based PSFCH format, or one or more of factors of a configuration period N of the PSFCH resource being 1, 2, and 4. That is, in order to avoid the complexity of the system, the processing manner of the transmission block reception result in step S102 is not adopted. Instead, under the condition that the time delay of the sending end allows, the sending equipment matches different transmission blocks to different PSFCH resource configuration periods, so as to avoid the problem that the generated feedback information exceeds the upper limit of the feedback channel or the feedback resource.

Optionally, the number of the multiple transport blocks sent by the second device to the first device is less than or equal to a preset threshold, where the preset threshold is determined according to one or more of a configuration period of the feedback resource set, a format of a feedback channel, and a size of a feedback resource used for sending HARQ information of the multiple transport blocks. 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 resource subset which is periodically pre-configured in a resource set at a system level and used for sending feedback information, wherein a device sending data in the resource set receives the feedback information in the feedback resource set, or correspondingly, a device receiving data in the resource set sends the 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 set of feedback resources.

Specifically, each transport block is correspondingly matched with one feedback resource when being transmitted, so that the transmitting end (the second device) may perform scheduling limitation to avoid the receiving end from simultaneously feeding back HARQ information corresponding to more than 2 TBs. That is, a preset threshold may be formulated, so that the number of the plurality of transport 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 a configuration period of the feedback resource set, a size of the feedback resource and a format of the feedback channel.

Illustratively, referring to FIG. 4, the scheduling order is TB1 > TB2 > TB3 > TB 4. Feedback resources corresponding to the TBs 1-4 are all in the timeslot 7, and the upper limit of HARQ information transmission using the sequence-based PSFCH format is 2 bits, so that the preset threshold can be set to 2. That is, the second device sends at most two transmission blocks to feed back in the same time slot with the feedback resource set, so that the first device only generates 2-bit feedback information at most. Then, the second device will not send TB3 any more after sending TB1 and TB2, and choose to send TB3 after slot 7, so that the feedback information corresponding to TB3 does not have to be sent in slot 7. In this way, the system can operate when only the sequence-based PSFCH format is supported. The complexity of system design is reduced, and the working performance of the system is improved.

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

Specifically, the feedback resource is a resource in the PSFCH resource, and may be configured for the access network device and indicated to the terminal device, or preconfigured in a certain resource pool and/or resource set. The pre-configuration refers to configuring the configuration to the terminal device through pre-writing in the terminal device or through Operation Administration and Maintenance (OAM). The configured feedback resource set is configured according to a certain period, so that when the period for the second device to send the transport block is greater than or equal to the configured period of the feedback resource set, only one HARQ information needs to be fed back in each feedback period, and the upper limit of the feedback resource or the sequence-based PSFCH bearer is not exceeded. For example, referring to fig. 4, if the feedback period N is 4, the transmission period of the second device may be an integer greater than or equal to 4. Assuming that the transmission period is 5, the second device needs to transmit a TB2 at slot 8, a TB3 at slot 13, and a TB4 at slot 18 after transmitting a TB1 at slot 3. Therefore, the first device only needs to send feedback information corresponding to TB1 in timeslot 7, and the problem that the size of the feedback information exceeds the upper limit of the feedback resource or the sequence-based feedback channel bearer does not occur.

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

Specifically, assuming that resources used by different transport blocks are reserved, the second device reserves resources and selectively sends the transport blocks according to the configuration period of the feedback resource set and the service delay requirement. Illustratively, the period of the resources reserved for the different transport blocks is greater than or equal to the configuration period of the feedback resource set. This avoids the need for the first device to transmit multiple feedback channels in parallel in the same time slot.

S202, the first equipment generates feedback information.

The feedback information is determined according to the received receiving results of the plurality of transport blocks, and is response information used for indicating whether the first device correctly receives the plurality of transport blocks.

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

S203, the first device determines a second feedback resource according to a second preset rule, and sends feedback information to the second device by using the second feedback resource.

The second preset rule is: determining the feedback resource corresponding to the transmission block with the highest priority as a second feedback resource; or, the feedback resource corresponding to the first received transmission block is determined as a second feedback resource; or determining the maximum feedback resource in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the minimum feedback resource in the received feedback resources corresponding to the multiple transport blocks is determined as a second feedback resource; or, determining the feedback resource corresponding to the transport block with the largest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transport blocks as a second feedback resource; or, determining the feedback resource corresponding to the transmission block with the smallest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the feedback resources corresponding to the received multiple transport blocks are determined as the second feedback resources.

Optionally, in a possible implementation manner, the data type 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 generate feedback information to feed back the receiving result. When the data type sent by the second device is multicast data, each data packet (transport 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, a first transport block TB1 sent by the second device corresponds to a feedback resource 1 in the first device, and the subsequent second device continues to send data blocks such as TB2, TB3, TB4, etc., it is determined that the feedback resources for transmitting feedback information corresponding to TB2, TB3, and TB4 are feedback resources 1 according to the destination address or source address (destination ID/source ID) established by the unicast link, that is, when the data type sent by the second device is unicast data, all the sent data blocks are mapped to the same feedback resource. Specifically, the method for determining the feedback resource by the transport block sent by the second device may be determined according to the following formula: f (the time slot index of the PSCCH/PSSCH, the sub-channel of the PSCCH/PSSCH, destination ID/source ID, unicast/groupcast/broadcast). That is, the feedback resource for transmitting the feedback information is determined by the data type, time domain resource, frequency domain resource, ID of the transmitting end, and ID of the receiving end sent by the transmitting end.

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

And S204, the second equipment sends the transmission block needing to be retransmitted to the first equipment.

Specifically, when the received feedback information is ACK, the transport block does not need to be retransmitted. And when the received feedback information is NACK, the transmission block needing to be retransmitted is the transmission block corresponding to the NACK information.

The feedback information transmission method provided by the embodiment of the application can determine the second feedback resource according to the second preset rule. Compared with the prior art in which the base station determines the feedback resource for transmitting the feedback information, in the embodiment of the present application, the feedback resource for transmitting the PSFCH in the sidelink is defined, so that the communication process is effectively performed. And according to various rules for generating feedback information, various determining modes of feedback resources are correspondingly defined, and more possibilities are provided for system design. The efficiency and performance of the system operation can be optimally improved.

In the embodiment of the present application, the network element may be divided into the functional units according to the above method example, 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 integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 7 shows a schematic diagram of a possible structure of the feedback information transmission apparatus in the above embodiment. The apparatus may be a first device (receiving end device) configured to generate and send feedback information. The device includes: a receiving module 701, a generating module 702 and a sending module 703.

A receiving module 701, configured to receive multiple transport blocks sent by a second device.

A generating module 702, configured to generate the feedback information according to a first preset rule, where the first preset rule includes: and generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks.

A sending module 703 is configured 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 the multiple transport blocks.

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

Optionally, the plurality of transport blocks includes a first transport block and a second transport block; the feedback information comprises first feedback information and second feedback information; the generating module 702 is specifically configured to generate first feedback information according to a receiving result of the first transport block, and generate second feedback information according to a receiving result of the second transport block; the number of the first transmission blocks or the second transmission blocks is one or more; when the number of the first transport blocks or the second transport blocks is multiple, the reception results of the multiple first transport blocks are bundled to generate first feedback information or the reception results of the multiple second transport blocks are bundled to generate second feedback information.

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

Optionally, the scheduling order of the first transport block is prior to the scheduling order of the second transport block; wherein the scheduling order is an order in which the first device receives the plurality of transport blocks.

Optionally, the first transport block is a first scheduled transport block in at least one transport block with a highest priority among the plurality of transport blocks.

Optionally, the first transport block is at least one transport block with the highest priority among the plurality of transport blocks.

Optionally, the length of the feedback information is a preset length; the partial transmission blocks include at least one third transmission block, and the generating module 702 is specifically configured to determine the number of the third transmission blocks according to a preset length; wherein, one bit of the preset length corresponds to the receiving result of one third transmission block; and generating feedback information according to the receiving results of the third transmission blocks.

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

Optionally, the scheduling order of the third transport block is prior to the scheduling order of the fourth transport block, and the fourth transport block is a transport block except the third transport block in all transport blocks received by the first device.

Optionally, the priority of part of the third transport blocks is equal to the priority of part of the fourth transport blocks, and the scheduling order of part of the third transport blocks is prior to the scheduling order of part of the fourth transport blocks.

Optionally, the sending module is specifically configured to send, by the first device, the feedback information to the second device by using a first feedback resource, where the first feedback resource is: and feedback resources corresponding to the latest received transmission block.

Fig. 8 shows a schematic diagram of a possible structure of the feedback information transmission apparatus in the above embodiment. The apparatus may be a second device (sending end device) configured to receive and parse the feedback information. The device includes: a sending module 801 and a receiving module 802.

A sending module 801, configured to send a plurality of transport blocks to a first device.

A receiving module 802, configured to receive feedback information sent by a first device, where the feedback information is used to indicate whether the first device correctly receives response information of multiple transport blocks; the feedback information is generated by the first device according to a first preset rule, and the first preset rule comprises: generating feedback information in a bundling mode according to the receiving results of the plurality of transmission blocks, or generating feedback information according to the receiving results of part of the transmission blocks;

the sending module 801 is further configured to send, by the second device, the transport block that needs to be retransmitted to the first device.

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

Optionally, if there is no feedback information in 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 apparatus in the above embodiment. The apparatus may be a first device (receiving end device) configured to generate and send feedback information. The device includes: a receiving module 901, a generating module 902, a determining module 903 and a sending module 904.

A receiving module 901, configured to receive multiple transport blocks sent by a second device.

A generating module 902, configured to generate feedback information according to the receiving result of the multiple transport blocks, where the feedback information is used to indicate whether the first device correctly receives the acknowledgement information of the multiple transport blocks.

A determining module 903, configured to determine a second feedback resource according to a second preset rule.

A sending module 904, configured to send the feedback information to the second device by using the second feedback resource.

Optionally, the second preset rule is: determining the feedback resource corresponding to the transmission block with the highest priority as a second feedback resource; or, the feedback resource corresponding to the first received transmission block is determined as a second feedback resource; or determining the maximum feedback resource in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the minimum feedback resource in the received feedback resources corresponding to the multiple transport blocks is determined as a second feedback resource; or, determining the feedback resource corresponding to the transport block with the largest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transport blocks as a second feedback resource; or, determining the feedback resource corresponding to the transmission block with the smallest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transmission blocks as a second feedback resource; or, the feedback resources corresponding to the received multiple transport blocks are determined as the second feedback resources.

Fig. 10 shows a schematic diagram of a possible structure of the feedback information transmission apparatus according to the above embodiment. The apparatus may be a second device (sending end device) configured to receive and parse the feedback information. The device includes: a transmitting module 1001 and a receiving module 1003.

A sending module 1001, configured to send a plurality of transport blocks to a first device.

A receiving module 1003, configured to receive 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 sending module 1001 is further configured to send, by the second device, the transport block that needs to be retransmitted to the first device.

Optionally, the apparatus further includes a determining module 1002, configured to determine that the number of the plurality of transport blocks is less than or equal to a preset threshold, where the preset threshold is determined according to at least one of: configuration period of feedback resource set, format of feedback channel, size of feedback resource. The feedback resource set is a pre-configured resource set, and the feedback resource is a resource for sending feedback information.

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

Fig. 11 shows a schematic view of a possible configuration of the device according to the above-described embodiment. The apparatus (device) may be, for example, the first device or the second device described above. The communication means may also be present in the form of software and may also be a chip available to the device. The communication apparatus includes: a processing unit 1102 and a communication unit 1103. Optionally, the communication unit 1103 may be further divided into a sending unit (not shown in fig. 11) and a receiving unit (not shown in fig. 11). Wherein, the sending unit is configured to support the communication device to send information to other network elements. A receiving unit, configured to support the communication device to receive information from other network elements.

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

The processing unit 1102 may be configured to support generation and analysis of feedback resources. When the apparatus is a first device, the processing unit 1102 may determine to generate feedback information according to a condition of a received transport block, so as to subsequently send the feedback information and further obtain a retransmitted transport block. When the apparatus is a second device, the processing unit 1102 is configured to process the feedback information, determine a data block that needs to be retransmitted, and add a redundant bit to the retransmitted data block, so as to improve a decoding rate of the first transport block. And/or other processes for the schemes described herein.

The communication unit 1103 is configured to support communication between the apparatus and other network elements, for example, support the apparatus to perform S101, S103, and the like in fig. 5. Optionally, in a case that the communication unit is divided into a sending unit and a receiving unit, the sending unit is configured to support the apparatus to send information to other network elements. Such as to enable the apparatus to perform S103 in fig. 4, etc., and/or other processes for the schemes described herein. A receiving unit, configured to support the apparatus to receive information from other network elements. Such as to enable the device to perform S101 in fig. 4, etc., and/or other processes for the schemes described herein.

In one possible approach, the processing unit 1102 may be a controller or the processor 301 or the processor 304 shown in fig. 3, such as a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication unit 1103 may be the communication interface 304 shown in fig. 3, a transceiver, or the like. The storage unit 1101 may be the memory 303 shown in fig. 3.

Embodiments of the present application further provide a computer storage medium for storing computer software instructions for the feedback information transmission apparatus, which includes a program designed to execute the steps performed by the feedback information transmission apparatus in the above embodiments.

Embodiments of the present application also provide a computer program product, such as a computer-readable storage medium, including a program designed to execute the steps performed by the feedback information transmission apparatus in the above embodiments.

The embodiment of the application provides a chip system. The system on chip includes a processor for implementing the processing functions according to the above method embodiments, and an input/output port for implementing the transceiving functions according to the above method embodiments.

In one possible design, the system-on-chip further includes a memory for storing program instructions and data implementing the functions involved in the above-described method embodiments.

The chip system may be constituted by a chip, or may include a chip and other discrete devices.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC.

In the embodiments provided in the present application, it should be understood that the disclosed method and apparatus can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on a plurality of network devices. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the 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 integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general hardware, and certainly, the present application can also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and all changes and substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting feedback information, the method comprising:

the method comprises the steps that a first device receives a plurality of transmission blocks sent by a second device;

the first device generates feedback information according to a first preset rule, where the first preset rule includes: generating the feedback information in a bundling manner according to the receiving results of the plurality of transmission blocks, or generating the feedback information according to the receiving results of part of the transmission blocks in the plurality of transmission blocks;

and the first equipment sends the feedback information to the second equipment, wherein the feedback information is used for indicating whether the first equipment correctly receives the response information of the plurality of transmission blocks.

2. The feedback information transmission method according to claim 1, wherein the length of the feedback information is a preset length; the generating the feedback information by binding bundling according to the receiving results of the plurality of transmission blocks includes:

the feedback information is generated by binding the reception results of all transport blocks or binding the reception results of part of the transport blocks.

3. The feedback information transmission method according to claim 2, wherein the plurality of transport blocks includes a first transport block and a second transport block; the feedback information comprises first feedback information and second feedback information; the generating the feedback information by binding the reception result of the partial transport block includes:

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

when the number of the first transport blocks or the second transport blocks is multiple, binding reception results of multiple first transport blocks to generate the first feedback information or binding reception results of multiple second transport blocks to generate the second feedback information.

4. The feedback information transmission method according to claim 3,

the priority of the first transport block is not lower than the priority of the second transport block.

5. The feedback information transmission method according to claim 3,

the scheduling order of the first transport block precedes the scheduling order of the second transport block; wherein the scheduling order is an order in which the first device receives the plurality of transport blocks.

6. The feedback information transmission method according to claim 4,

the first transport block is a first scheduled transport block in at least one transport block with a highest priority among the plurality of transport blocks.

7. The feedback information transmission method according to claim 4,

the first transport block is at least one transport block with the highest priority among the plurality of transport blocks.

8. The feedback information transmission method according to claim 1, wherein the length of the feedback information is a preset length; the generating the feedback information according to the receiving result of the partial transport blocks in the plurality of transport blocks includes:

determining the number of third transmission blocks according to the preset length; wherein, one bit of the preset length corresponds to a receiving result of a third transmission block;

and generating the feedback information according to the receiving results of the number of third transmission blocks.

9. The feedback information transmission method according to claim 8,

the priority of the third transmission block is not lower than that of a fourth transmission block, and the fourth transmission block is the transmission block except the third transmission block in all the transmission blocks received by the first device.

10. The feedback information transmission method according to claim 8,

the scheduling order of the third transport block is prior to the scheduling order of a fourth transport block, where the fourth transport block is a transport block other than the third transport block in all transport blocks received by the first device.

11. The feedback information transmission method of claim 9, wherein the priority of a portion of the third transport blocks is equal to the priority of a portion of the fourth transport blocks, and the scheduling order of the portion of the third transport blocks precedes the scheduling order of the portion of the fourth transport blocks.

12. The feedback information transmission method according to any of claims 1-11, wherein the sending, by the first device, the feedback information to the second device comprises:

the first device sends the feedback information to the second device by using a first feedback resource, where the first feedback resource is: and feedback resources corresponding to the latest received transmission block.

13. A method for transmitting feedback information, the method comprising:

the second device sends a plurality of transmission blocks to the first device;

the second device receives feedback information sent by the first device, wherein the feedback information is used for indicating whether the first device correctly receives response information of the plurality of transport blocks; the feedback information is generated by the first device according to a first preset rule, where the first preset rule includes: generating the feedback information in a bundling manner according to the receiving results of the plurality of transmission blocks, or generating the feedback information according to the receiving results of part of the transmission blocks in the plurality of transmission blocks;

and the second equipment sends the transmission block needing to be retransmitted to the first equipment.

14. The feedback information transmission method according to claim 13, wherein the receiving, by the second device, the feedback information sent by the first device includes:

the second equipment receives the feedback information according to a second preset rule; the second preset rule comprises: and according to the scheduling sequence, sequentially receiving the feedback information from the feedback resource corresponding to the latest scheduled transmission block.

15. The feedback information transmission method according to claim 13,

and if the received feedback resource has no feedback information, retransmitting the transmission block corresponding to the received feedback resource.

16. A method for transmitting feedback information, the method comprising:

the first equipment generates feedback information according to the receiving results of the plurality of transmission blocks; wherein the feedback information is used for indicating whether the first device correctly receives the response information of the plurality of transmission blocks;

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

and the first equipment sends the feedback information to the second equipment by utilizing the second feedback resource.

17. The feedback information transmission method according to claim 16, wherein the second predetermined rule is:

determining the feedback resource corresponding to the transmission block with the highest priority as the second feedback resource;

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

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

or, the minimum feedback resource among the received feedback resources corresponding to the multiple transport blocks is determined as the second feedback resource;

or, the feedback resource corresponding to the transport block with the largest index of the frequency domain resources in the received feedback resources corresponding to the plurality of transport blocks is determined as the second feedback resource;

or, the feedback resource corresponding to the transport block with the smallest index of the frequency domain resources in the feedback resources corresponding to the received multiple transport blocks is determined as the second feedback resource;

or, the feedback resources corresponding to the received multiple transport blocks are determined as the second feedback resources.

18. A method for transmitting feedback information, the method comprising:

the second device sends a plurality of transmission blocks to the first device;

the second device receives feedback information sent by the first device, wherein the feedback information is used for indicating whether the first device correctly receives response information of the plurality of transport blocks;

19. The feedback information transmission method of claim 18, wherein the method further comprises:

the number of the 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 contents: the configuration period of the feedback resource set, the format of a feedback channel and the size of the feedback resource; the feedback resource set is a pre-configured resource set, and the feedback resource is a resource for sending feedback information.

20. The feedback information transmission method according to any one of claims 18 to 19,

and the period of the transmission block by the second equipment is more than or equal to the configuration period of the feedback resource set.

21. An apparatus, comprising: a processor, a memory;

the memory is configured to store computer-executable instructions that, when executed by the apparatus, are executed by the processor to cause the apparatus to perform the feedback information transmission method of any one of claims 1-12 or to cause the apparatus to perform the feedback information transmission method of any one of claims 13-15.

22. An apparatus, comprising: a processor, a memory;

the memory is configured to store computer-executable instructions that, when executed by the apparatus, are executed by the processor to cause the apparatus to perform the feedback information transmission method of any one of claims 16-17 or to cause the apparatus to perform the feedback information transmission method of any one of claims 18-20.

23. An apparatus, characterized in that the apparatus performs the feedback information transmission method according to any one of claims 1-12, or the apparatus performs the feedback information transmission method according to any one of claims 13-15.

24. An apparatus, characterized in that the apparatus performs the feedback information transmission method according to any one of claims 16-17 or the apparatus performs the feedback information transmission method according to any one of claims 18-20.

25. A computer-readable storage medium, in which instructions are stored, which, when executed by a computer, cause the computer to perform the feedback information transmission method according to any one of claims 1 to 12, or 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 the feedback information transmission method according to any one of claims 18 to 20.

26. A computer program product comprising instructions for, when run on a computer, the computer to perform a feedback information transmission method according to any one of claims 1 to 12, or to perform a feedback information transmission method according to any one of claims 13 to 15, or to perform a feedback information transmission method according to any one of claims 16 to 17, or to perform a feedback information transmission method according to any one of claims 18 to 20.