CN114424646A

CN114424646A - Feedback information multiplexing method, communication device and system

Info

Publication number: CN114424646A
Application number: CN201980100514.5A
Authority: CN
Inventors: 董蕾; 张锦芳; 卢磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-04-29
Also published as: WO2021062780A1

Abstract

The embodiment of the application discloses a feedback information multiplexing method, a communication device and a system, relates to the field of communication, and supports multiplexing of feedback information among terminals in a sidestream communication scene. The method comprises the following steps: the first terminal equipment sends at least two data blocks to the second terminal equipment; the data block is a transmission block or a group of code blocks; the first terminal device receives first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each data block of the at least two data blocks on the sidelink SL.

Description

Feedback information multiplexing method, communication device and system

Technical Field

The embodiment of the application relates to the field of communication, and in particular relates to a feedback information multiplexing method, a communication device and a system.

Background

Long term evolution (long ter)m evolution, LTE) communication system, fifth generation (5)^thgeneration, 5G) communication system, multiple downlink data are supported to multiplex (feedback) on the same uplink resource, that is, hybrid automatic repeat request (HARQ) information of multiple downlink data can be sent on one uplink resource.

The LTE communication system and the 5G communication system also support Sidelink (SL) communication between devices, such as: device to device (D2D) communication, vehicle to all (V2X) communication, etc. However, no specific scheme supports the multiplexing feedback of HARQ information in such a scenario at present.

Disclosure of Invention

The embodiment of the application provides a feedback information multiplexing method, a communication device and a system, and the feedback information multiplexing between terminals is supported in a sidestream communication scene.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a method for multiplexing feedback information is provided, including:

the first terminal equipment sends at least two data blocks to the second terminal equipment; the data block is a transmission block or a group of code blocks; the first terminal device receives first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks on the sidelink SL.

The embodiment of the application provides a method for multiplexing feedback information, wherein a first terminal device sends at least two data blocks to a second terminal device; the second terminal device may send first feedback multiplexing information to the first terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks on the sidelink. The embodiment of the application provides a specific scheme for multiplexing feedback information under the NR-V2X scene, and the multiplexing of the feedback information under the NR-V2X scene is supported.

In one possible design, the method further includes: the first terminal device sends sidelink control information SCI to the second terminal device.

In this embodiment, before multiplexing the feedback information of the multiple data blocks on the sidelink, the first terminal may also schedule the multiple data blocks through the SCI.

In one possible design, the SCI includes first information indicating a position of feedback information of an SCI-scheduled data block corresponding to the first information in the first feedback multiplexing information.

In this embodiment of the application, the first terminal device may indicate, through the first information, how the second terminal device performs feedback multiplexing on the sidelink, and specifically, explicitly indicate, through the first information, a position in the feedback multiplexing information of the data block.

In one possible design, the SCI includes second information indicating an accumulated number of scheduled sideline transmissions by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information.

In this embodiment of the application, the first terminal device may indicate, through the second information, how the second terminal device performs feedback multiplexing on the sidelink, and specifically, indicate, through the second information, that the cumulative number of times of scheduled sidelink transmission in the first time unit is cut off in multiple sidelink transmissions corresponding to the same sidelink feedback resource. Based on the accumulated number, it can be determined that the SCI scheduled sidelink transmission is the several scheduled sidelink transmissions corresponding to one sidelink feedback resource. Accordingly, the position of the feedback information of the data block corresponding to the sideline transmission in the feedback multiplexing information can be determined according to the scheduled sequence of the sideline transmission.

In one possible design, the SCI includes third information indicating a total number of scheduled sideline transmissions by the second time unit; the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information.

In this embodiment, before multiplexing the feedback information of the multiple data blocks on the sidelink, the SCI sent by the first terminal may further indicate the total number of sidelink transmission times that the second time unit should be scheduled in multiple sidelink transmissions corresponding to the same sidelink feedback resource. According to the accumulated number, the number of the sidelink transmissions corresponding to the same sidelink feedback resource can be determined, so that the feedback of the data blocks corresponding to the sidelink transmissions on the same sidelink feedback resource is determined.

In one possible design, the method further comprises: the first terminal device sends second feedback multiplexing information to the network device, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.

In this embodiment, the terminal device may further perform feedback multiplexing on the feedback information of the sidelink data block and the downlink data block, and send multiplexing information of the feedback information of the sidelink data block and the downlink data block to the network device on the same uplink feedback resource.

In one possible design, the method further comprises:

the first terminal equipment receives downlink control information DCI sent by the network equipment.

In this embodiment of the present application, before multiplexing feedback information of multiple side-row data blocks and downlink data blocks on an uplink, the network device may also schedule the multiple data blocks through DCI.

In one possible design, the DCI includes fourth information indicating a position of feedback information of a DCI-scheduled data block corresponding to the fourth information in the second feedback multiplexing information.

In this embodiment of the application, the first terminal device may indicate, through the fourth information, how the first terminal device performs feedback multiplexing on the uplink, and specifically, explicitly indicate, through the fourth information, a position in the feedback multiplexing information of the data block.

In one possible design, the DCI includes fifth information indicating an accumulated number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information. The transmission may be a downlink transmission or a sidelink transmission.

In this embodiment of the present application, the first terminal device may indicate, through the fifth information, how the second terminal device performs feedback multiplexing on the uplink, and specifically, indicate, through the fifth information, an accumulated number of scheduled transmission times of a third time unit in multiple transmissions (sidelink transmission and/or downlink transmission) corresponding to the same uplink feedback resource. It can be determined from the accumulated number that the DCI scheduled transmission is the several scheduled transmissions corresponding to one uplink feedback resource. Accordingly, the position of the feedback information for transmitting the corresponding data block in the feedback multiplexing information may be determined according to the scheduled order of transmission.

In one possible design, the DCI includes sixth information indicating a total number of scheduled transmissions by a fourth time unit; and the fourth time unit is a time unit for the first terminal device to receive the DCI corresponding to the sixth information.

In this embodiment, before multiplexing the feedback information of multiple data blocks on the uplink, the DCI may further indicate the total number of transmissions (sidelink transmissions and/or downlink transmissions) that should be scheduled in the fourth time unit, in multiple transmissions corresponding to the same uplink feedback resource. According to the accumulated number, the number of transmissions corresponding to the same uplink feedback resource can be determined, so that feedback of data blocks corresponding to the transmissions on the same uplink feedback resource is determined.

In a second aspect, a method for multiplexing feedback information is provided, including: the second terminal equipment receives at least two data blocks from the first terminal equipment; the data block is a transmission block or a group of code blocks; and the second terminal equipment sends first feedback multiplexing information to the first terminal equipment, wherein the first feedback multiplexing information is the multiplexing information of the feedback information of each data block in the at least two data blocks on the sidelink SL.

In one possible design, the method further comprises: the second terminal device receives the sidelink control information SCI from the first terminal device.

In a third aspect, a method for multiplexing feedback information is provided, including: the network equipment sends downlink control information DCI to the first terminal equipment; the DCI is used for scheduling at least two data blocks on a sidelink; the data block is a transmission block or a group of code blocks; the network device receives, from the first terminal device, second feedback multiplexing information, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.

In one possible design, the DCI includes fifth information indicating an accumulated number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information.

In a fourth aspect, a communication apparatus is provided, including: a transceiving unit, configured to send at least two data blocks to a second terminal device; the data block is a transmission block or a group of code blocks; the transceiving unit is further configured to receive first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each of at least two data blocks on the sidelink SL.

In one possible embodiment, the transceiver unit is further configured to send sidelink control information SCI to the second terminal device.

In a possible design, the transceiver unit is further configured to send, to the network device, second feedback multiplexing information, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.

In a possible design, the transceiver unit is further configured to receive downlink control information DCI sent by the network device.

In a fifth aspect, a communication apparatus is provided, including: a transceiving unit, configured to receive at least two data blocks by a first terminal device; the data block is a transmission block or a group of code blocks; the transceiving unit is further configured to send first feedback multiplexing information to the first terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each of at least two data blocks on the sidelink SL.

In one possible embodiment, the transceiver unit is further configured to receive sidelink control information SCI from the first terminal device.

In a sixth aspect, a communication apparatus is provided, including: a transceiving unit, configured to send downlink control information DCI to a first terminal device; the DCI is used for scheduling at least two data blocks on a sidelink; the data block is a transmission block or a group of code blocks; the transceiving unit is further configured to receive, from the first terminal device, second feedback multiplexing information, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.

In a seventh aspect, a communications apparatus is provided that includes a processor coupled with a memory; a memory for storing a computer program; a processor configured to execute the computer program stored in the memory to enable the communication apparatus to implement the method according to any one of the implementation manners of the first aspect and the first aspect, the method according to any one of the implementation manners of the second aspect and the second aspect, and the method according to any one of the implementation manners of the third aspect and the third aspect, where the communication apparatus may be a baseband chip, and the baseband chip reads the computer program to enable an apparatus in which the baseband chip is installed to implement the method according to any one of the implementation manners of the first aspect.

In an eighth aspect, there is provided a computer-readable storage medium comprising: the computer readable storage medium has instructions stored therein; when the computer readable storage medium is run on the communication apparatus according to any one of the third aspect and any one of the implementation manners of the third aspect, the fourth aspect and any one of the implementation manners of the fourth aspect, the fifth aspect and any one of the implementation manners of the fifth aspect, the computer readable storage medium causes the communication apparatus to implement the method according to any one of the implementation manners of the first aspect and the first aspect, the implementation manners of the second aspect and the second aspect, the implementation manners of the third aspect and any one of the implementation manners of the third aspect.

In a ninth aspect, a wireless communications apparatus is provided, comprising: instructions are stored in the wireless communication device; when the wireless communication device is operated on the communication device according to any one of the implementation manners of the third aspect and the third aspect, any one of the implementation manners of the fourth aspect and the fourth aspect, the fifth aspect and the fifth aspect, the wireless communication device is caused to implement the method according to any one of the implementation manners of the first aspect and the first aspect, the implementation manners of the second aspect and the second aspect, the implementation manners of the third aspect and the third aspect. The wireless communication device is a chip.

In a tenth aspect, there is provided a communication system comprising: the system comprises a first terminal device, a second terminal device and a network device;

the first terminal equipment is used for sending at least two data blocks to the second terminal equipment; the data block is a transmission block or a group of code blocks; receiving first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information of each of at least two data blocks and feedback information of a downlink data block on the sidelink SL, or the second feedback multiplexing information is multiplexing information of feedback information of each of at least two data blocks;

a second terminal device for receiving at least two data blocks from the first terminal device; sending first feedback multiplexing information to first terminal equipment;

the first terminal device is further configured to send second feedback multiplexing information to the network device, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks;

the network device is configured to receive the second feedback multiplexing information.

Drawings

Fig. 1 is an architecture diagram of a communication system provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of TB and CBG provided by an embodiment of the present application;

fig. 3 is a schematic diagram of feedback multiplexing provided in an embodiment of the present application;

FIG. 4 is a schematic illustration of cDAI, tDAI provided by an embodiment of the present application;

fig. 5 is another schematic diagram of feedback multiplexing provided in the embodiment of the present application;

fig. 6a is a block diagram of a communication device according to an embodiment of the present application;

fig. 6b is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart of a feedback information multiplexing method according to an embodiment of the present application;

fig. 8 to 14 are schematic diagrams of another feedback multiplexing scheme provided in the embodiment of the present application;

fig. 15 is another schematic flow chart of a feedback information multiplexing method according to an embodiment of the present application;

fig. 16-22 are schematic diagrams of another feedback multiplexing scheme provided in the embodiments of the present application;

fig. 23 is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 24 is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 25 is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 26 is another block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a communication system to which the technical solution provided in the present application is applicable, where the communication system may include a plurality of network devices (only network device 100 is shown) and a plurality of terminal devices (only terminal device 201 and terminal device 202 are shown). Fig. 1 is a schematic diagram, and does not limit the application scenarios of the technical solutions provided in the present application. The communication system supports sidelink communication, such as: device to device (D2D) communication, vehicle to all (V2X) communication, etc.

The network device and the terminal device may perform uplink and downlink transmission through a cellular link (Uu link), and the terminal device may perform communication through a sidelink link (sidelink link), for example, D2D communication, V2X communication, Machine Type Communication (MTC), and the like.

The network device may be a transmission reception node (TRP), a base station, a relay station, or an access point. The network device may be a network device in a 5G communication system or a network device in a future evolution network; but also wearable devices or vehicle-mounted devices, etc. In addition, the method can also comprise the following steps: a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or an eNB or enodeb (evolved nodeb) in Long Term Evolution (LTE). The network device may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The embodiments of the present application will be described with reference to a base station as an example.

The terminal equipment may be User Equipment (UE), access terminal equipment, UE unit, UE station, mobile station, remote terminal equipment, mobile device, UE terminal equipment, wireless communication device, UE agent, or UE device, etc. The access terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc. The terminal device of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit built in the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, on-board component, on-board chip, or on-board unit. The first terminal device, the second terminal device and the network device of the present application may be one or more chips, and may also be a System On Chip (SOC), etc.

The communication system shown in fig. 1 may be referred to as a new radio, NR) -V2X communication system, in the communication system shown in fig. 1, the network device 101 and the terminal device 201 or the terminal device 202 may communicate via a Uu link, and the terminal 201 and the terminal 202 may communicate via a sidelink. Currently, a Uu link is supported to support multiple downlink data to multiplex (multiplexing) feedback on the same uplink resource. For example, referring to fig. 2, HARQ information of 4 downlink data D0, D1, D2, and D3 is fed back on the same uplink resource U0.

In addition, the communication system shown in fig. 1 supports two sidelink resource allocation modes, one is a base station allocation mode (referred to as mode-1) and the other is a user selection mode (referred to as mode-2). In mode-1, the base station may allocate sidelink resources to the terminal for sidelink communication according to a Buffer State Report (BSR) reported by the terminal. And the terminal under the mode-2 selects the sidelink resource by itself to carry out sidelink communication.

First, terms related to embodiments of the present invention are explained:

(1) data block

In the embodiment of the present application, a data block may be a Transport Block (TB) or a group of code blocks. Wherein, a group of code blocks may be a Code Block Group (CBG). For example, referring to fig. 2, one data channel is used for transmitting one or more TBs, wherein each TB may include N CBGs. N is an integer of 1 or more.

In a possible implementation manner, a (CBGTI) field may be included in Downlink Control Information (DCI), and the field is used to indicate the number of CBGs included in one TB, that is, the N.

(2) Feedback information for data blocks

After receiving the data block from the sending end, the receiving end can reply the feedback information of the data block to the sending end and indicate the receiving condition of the data block by the receiving end. In this embodiment, the feedback information of the data block may be HARQ feedback information of the data block, or may be Channel State Information (CSI) obtained according to the data block. The CSI may be a precoding indicator (PMI), a rank indicator (ri), or a Channel Quality Indicator (CQI).

Wherein, the receiving end sends HARQ feedback information to the sending end to indicate whether the TB sent by the sending end is successfully received by the receiving end. Illustratively, a sending end sends a data block to a receiving end, and if the receiving end successfully receives the data block, 1-bit ack (acknowledgement) is fed back to the sending end to indicate that the receiving end successfully receives the data block; if the receiving end does not successfully receive the data block, 1-bit nack (negative acknowledgement) is fed back to the transmitting end to instruct the transmitting end to retransmit the data block. After receiving the NACK from the receiving end, the transmitting end may retransmit the data block to the receiving end. The 1-bit NACK or the 1-bit ACK may be referred to as HARQ feedback information of the data block. Illustratively, ACK is "1" and NACK is "0".

(2) Feedback multiplexing

The feedback multiplexing means that the feedback information of a plurality of data blocks is coded together and then sent to the sending end. Here, information obtained when the feedback information of the plurality of data blocks is multiplexed may be referred to as feedback multiplexing information. In this embodiment, the feedback multiplexing information may be a sequence of N bits, and one bit of the sequence represents the feedback information of one data block. The position of the feedback information in the feedback multiplex information is used to indicate which bit in the sequence the feedback information is.

For example, in fig. 3, HARQ information of downlink data blocks D0, D1, D2, and D3 is fed back on the same uplink resource U0, assuming that HARQ feedback information of D0 is "0", HARQ feedback information of D1 is "1", HARQ feedback information of D2 is "1", and HARQ feedback information of D3 is "0".

When multiplexing the feedback information of D0, D1, D2, and D3, the receiving end may determine feedback multiplexing information "0110" of 4 bits according to the feedback information of D0, D1, D2, and D3, encode the feedback multiplexing information "0110", and transmit the encoded feedback multiplexing information "0110" to the transmitting end.

(3) Feedback resources

In this embodiment, the feedback resource is a resource for sending feedback information to the sending end. For example, the feedback resource may be a sidelink resource or an uplink resource. The sidelink resource refers to a sidelink resource for performing communication between terminals, and the uplink resource is a resource for transmitting data to the base station by the terminal. In the embodiment of the present application, it is assumed that the feedback resource is a sidelink resource, which may be referred to as a sidelink feedback resource; the feedback resource is assumed to be an uplink resource and may be referred to as an uplink feedback resource.

When the feedback is multiplexed, the receiving end can also send feedback multiplexing information to the sending end through the feedback resource. The feedback multiplexing information is multiplexing information of feedback information of a plurality of data blocks, and the plurality of data blocks may be referred to as data blocks corresponding to the feedback resources.

(4) A Downlink Assignment Index (DAI) field

On the Uu link, the base station may send (DCI) scheduling downlink data to the terminal device. The DCI includes a counter DAI (cDAI) field and a total DAI (tDAI) field. The cDAI is used to indicate a time unit for ending the UE receiving the DCI, and corresponds to the same HARQ feedback resource, and a scheduled cumulative number (uplink number) of downlink transmissions. the tDAI is used to indicate a time unit for ending the reception of DCI by the UE, and corresponds to the total number (total number) of scheduled downlink transmissions for the same HARQ feedback resource. Here, one downlink transmission may be considered that the base station sends a Physical Downlink Shared Channel (PDSCH) to the terminal device, and the scheduled downlink transmission may be considered as a scheduled PDSCH. In the embodiment of the present application, downlink transmission may be equivalent to PDSCH.

It should be noted that in the embodiments of the present application, various numerical values indicating numbers are counted from 1. Illustratively, the cumulative number is i, which is a number counted from 1. The total number is j, which is a number counted from 1.

For example, it is assumed that one downlink transmission scheduled by the base station is used for transmitting one data block, and downlink data blocks D0, D1, D2 and D3 are scheduled by DCI1, DCI2, DCI 3 and DCI 4, respectively. HARQ information of the downlink data blocks D0, D1, D2, and D3 is fed back on the same uplink resource U0, and referring to fig. 4, (x, y) respectively indicate the number indicated by the cDAI field and the number indicated by the tDAI field. The base station sends DCI1 to the UE in slot (slot) 1, the DCI1 indicates the uplink resource of D0, the DAI field in the DCI1 indicates (1, 2), namely, the slot1 is cut off, the cumulative number of scheduled transmissions in the four downlink transmissions corresponding to U0 is 1, namely, the downlink transmission corresponding to D0 is the first scheduled downlink transmission. In addition, by slot1, the total number of scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 2, that is, the base station schedules two downlink transmissions, for example, schedules two PDSCHs, on slot 1.

The base station sends DCI2 to the UE in slot (slot) 1, the DCI2 indicates the uplink resource of D1, the DAI field in the DCI2 indicates (2, 2), namely slot1 is cut off, the cumulative number of the scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 2, namely the downlink transmission corresponding to D1 is the second scheduled downlink transmission. In addition, by slot1, the total number of scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 2, that is, by slot1, the base station schedules two downlink transmissions.

The base station sends DCI 3 to the UE in slot (slot) 2, the DCI 3 indicates the uplink resource of D2, the DAI field in the DCI 3 indicates (3, 4), namely slot2 is cut off, and the cumulative number of the scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 3, namely D2 is the third scheduled transmission. In addition, by slot2, the total number of scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 4, that is, by slot2, the base station is to schedule four downlink transmissions, for example, four PDSCHs.

The base station sends DCI 4 to the UE in slot (slot) 2, the DCI 4 indicates the uplink resource of D3, the DAI field in the DCI 4 indicates (4, 4), namely slot2 is cut off, and the cumulative number of the scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 4, namely D3 is the fourth scheduled downlink transmission. In addition, by slot2, the total number of scheduled downlink transmissions in the four downlink transmissions corresponding to U0 is 4, that is, by slot2, the base station schedules four downlink transmissions.

The cDAI field may help the UE detect whether downlink DCI is lost. For example, if the cDAI parsed from the DCI received by the UE indicates 1, 3, and 4, respectively, it may be determined that DCI2 of scheduling D1 is lost, and the UE cannot receive D1, and therefore, it may also be determined that HARQ feedback information of D1 is "NACK". In addition, the cDAI field may also help the UE determine the position of HARQ information of a data block corresponding to DCI scheduled data transmission in the feedback multiplexing information, and help the UE correctly transmit the HARQ information on the U0.

For example, referring to fig. 5, feedback information of four transmissions corresponding to DCI1, DCI2, DCI 3, and DCI 4 is transmitted on U0, and U0 needs to transmit 4 bits of feedback information. Assume that the cDAI field of DCI 3 indicates that the downlink transmission for D2, which is 4, is the 4 th scheduled downlink transmission among the four transmissions corresponding to U0. The UE may determine the location of the HARQ information of D2 in the feedback multiplexing information according to the mapping rule. Taking one downlink transmission scheduled by the base station for transmitting one data block as an example, assume that the mapping rule is: "the feedback information of the ith scheduled downlink transmission occupies the ith bit in the feedback multiplexing information", then the HARQ information of D2 is the fourth bit in the 4-bit feedback multiplexing information. Assuming that D2 is successfully received and the HARQ information of D2 is "1", the fourth bit in the 4-bit feedback multiplexing information is "1".

The terminal device according to the embodiment of the present application can be implemented by the communication apparatus 610 in fig. 6 a. Fig. 6a is a schematic diagram illustrating a hardware structure of a communication device 610 according to an embodiment of the present disclosure. The communication device 610 includes a processor 6101, a communication link 6102, a memory 6103, and at least one communication interface (fig. 6a is only exemplary and is illustrated as including the communication interface 6104).

The processor 6101 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 6102 may include a path for communicating information between the aforementioned components.

Communication interface 6104 may be implemented using any transceiver or the like for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.

The memory 6103 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can 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, but is not limited to these. The memory may be separate and coupled to the processor via communication link 6102. The memory may also be integral to the processor.

The memory 6103 is used for storing computer-executable instructions for executing the present invention, and is controlled by the processor 6101 to execute. The processor 6101 is configured to execute the computer executable instructions stored in the memory 6103, thereby implementing the intent processing 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, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 6101 may include one or more CPUs such as CPU0 and CPU1 in fig. 6a as an embodiment.

In a specific implementation, the communication device 610 may include multiple processors, such as the processor 6101 and the processor 6108 in fig. 6a, as an example. 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 a specific implementation, the communication apparatus 610 may further include an output device 6105 and an input device 6106 as an embodiment. An output device 6105 is in communication with the processor 6101 and may display information in a variety of ways. For example, the output device 6105 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 6106 is in communication with the processor 6101 and can receive input from a user in a variety of ways. For example, the input device 6106 may be a mouse, keyboard, touch screen device, or sensing device, among others.

The communication device 610 may be a general-purpose device or a special-purpose device. In a specific implementation, the communication device 610 may be a desktop computer, a laptop computer, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device with a similar structure as in fig. 6 a. The embodiment of the present application does not limit the type of the communication device 610.

Fig. 6b is a schematic diagram of a network device. The structure of network device 620 may refer to the structure shown in fig. 6 b.

The network device includes at least one processor 6201, at least one memory 6202, at least one transceiver 6203, at least one network interface 6204, and one or more antennas 6205. The processor 6201, memory 6202, transceiver 6203, and network interface 6204 are connected, e.g., via a bus. Antenna 6205 is connected to transceiver 6203. Network interface 6204 is used to enable the network device to connect with other communication devices through a communication link, for example, the network device connects with a core network element through an S1 interface. In the embodiment of the present application, the connection may include various interfaces, transmission lines, buses, and the like, which is not limited in this embodiment.

The processor in this embodiment, for example, the processor 6201, may include at least one of the following types: a general-purpose Central Processing Unit (CPU), a Digital Signal Processor (DSP), a microprocessor, an Application-Specific Integrated Circuit (ASIC), a Microcontroller (MCU), a Field Programmable Gate Array (FPGA), or an Integrated Circuit for implementing logic operations. For example, the processor 6201 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The at least one processor 6201 may be integrated in one chip or located on multiple different chips.

The memory, for example, the memory 6202, in the embodiment of the present application may include at least one of the following types: read-only memory (ROM) or other types of static memory devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic memory devices that may store information and instructions, and Electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory may also be, but is not limited to, a compact disk-read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, 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 6202 may be separate and coupled to the processor 6201. Alternatively, the memory 6202 may be integrated with the processor 6201, for example, integrated in one chip. The memory 6202 can store program codes for executing the technical solution of the embodiment, and the processor 6201 controls the execution of the program codes, and various executed computer program codes can also be regarded as drivers of the processor 6201. For example, the processor 6201 is configured to execute computer program codes stored in the memory 6202, so as to implement the technical solution in the embodiment of the present application.

The transceiver 6203 may be configured to support receiving or transmitting radio frequency signals between the network device and the terminal, and the transceiver 6203 may be connected to the antenna 6205. Specifically, one or more antennas 6205 may receive an rf signal, and the transceiver 6203 may be configured to receive the rf signal from the antennas, convert the rf signal into a digital baseband signal or a digital if signal, and provide the digital baseband signal or the digital if signal to the processor 6201, so that the processor 6201 performs further processing on the digital baseband signal or the digital if signal, such as demodulation processing and decoding processing. Additionally, transceiver 6203 may be configured to receive a modulated digital baseband signal or digital intermediate frequency signal from processor 6201, convert the modulated digital baseband signal or digital intermediate frequency signal to a radio frequency signal, and transmit the radio frequency signal via one or more antennas 6205. Specifically, the transceiver 6203 may selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the rf signal to obtain a digital baseband signal or a digital intermediate frequency signal, where a sequence of the down-mixing processing and the analog-to-digital conversion processing is adjustable. The transceiver 6203 may selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or the digital intermediate frequency signal to obtain the radio frequency signal, where an order of the up-mixing processing and the digital-to-analog conversion processing is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as a digital signal. A transceiver may be referred to as a transceiving circuit, a transceiving unit, a transceiving device, a transmitting circuit, a transmitting unit, a transmitting device, or the like.

An embodiment of the present application provides a method for multiplexing feedback information, which is applicable to a mode-2, and as shown in fig. 7, the method includes the following steps:

step 701, the first terminal device sends Sidelink Control Information (SCI) to the second terminal device.

It should be noted that, in mode-2, the terminal can select the sidelink resource by itself. When the first terminal device has data to send to the second terminal device, the first terminal device may select the sidelink resource by itself, and send the SCI indication sidelink resource to the second terminal device. The sidelink resources are used for transmitting sidelink data blocks. The sidelink data block is a data block on a sidelink, for example, a data block transmitted by a first terminal device to a second terminal device. The data block may be a TB or a CBG.

In addition, after the first terminal device selects the sidelink resource of the data block, the sidelink feedback resource of the data block in the sidelink can be determined according to the sidelink resource of the data block. It is assumed that the sidelink feedback resources of at least two data blocks sent by the first terminal device to the second terminal device are the same, that is, the feedback information of the at least two data blocks needs to be feedback-multiplexed. Specifically, multiplexing information of the feedback information of the at least two data blocks (referred to as first feedback multiplexing information in the embodiment of the present application) is sent on the same sidelink feedback resource.

In a specific implementation, the SCI may include first information, second information, and third information. The first information is used for indicating the position of the feedback information of the data block scheduled by the SCI corresponding to the first information in the first feedback multiplexing information.

For example, feedback information of M data blocks is feedback-multiplexed on the same sidelink feedback resource, the first feedback information may be a sequence with a length of M bits, and the first information may be a sequence with a length of M bits

And the binary sequence of the bits represents M bits in the first feedback multiplexing information. For example, feedback information of 4 data blocks is feedback-multiplexed on the same sidelink feedback resource, the first feedback multiplexing information may be 4-bit information, and the first information may be 2-bit information. Where "00" represents a first bit in the first feedback multiplexing information, "01" represents a second bit in the first feedback multiplexing information, "10" represents a third bit in the first feedback multiplexing information, and "11" represents a fourth bit in the first feedback multiplexing information.

The second information is used for indicating the cumulative number (cumulative number) of scheduled sideline transmission times in the sideline transmission corresponding to the same sideline link feedback resource by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information. In a specific implementation, the first terminal device counts a plurality of sidelink transmissions corresponding to the same sidelink feedback resource, and determines an accumulated number of times of sidelink transmissions scheduled by the first time unit. The second information may be a cDAI field as described in the embodiments of the present application.

The one-time sidelink transmission may be regarded as that the first terminal device transmits a physical sidelink shared channel (pscch) to the second terminal device, the scheduled sidelink transmission may be regarded as a scheduled pscch, the number of times of the scheduled sidelink transmission may be regarded as the number of the scheduled pscchs, and the one-time sidelink transmission corresponds to one pscch. In the embodiment of the present application, the sidelink transmission may be an equivalent concept to the psch. Assuming that data blocks transmitted by multiple sidelink transmissions need to send corresponding feedback information on the same sidelink feedback resource, the sidelink transmissions are considered to be the sidelink transmissions corresponding to the sidelink feedback resource. The cumulative number of sideline transmissions, i.e., how many sideline transmissions are cumulatively scheduled.

The third information is used for indicating the total number (total number) of scheduled sideline transmission times in the sideline transmission corresponding to the same sideline link feedback resource by the second time unit; and the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information. In a specific implementation, the first terminal device counts a plurality of sidelink transmissions corresponding to the same sidelink feedback resource, and determines the total number of sidelink transmission times that should be scheduled by the second time unit. The total number of side row transmission times, i.e., how many side row transmissions are scheduled in total. The third information may be a tDAI field as described in the embodiments of the present application.

The SCI may further include sidelink resource information indicating sidelink resources. The sidelink resources are used for transmitting the SCI scheduled data blocks.

The SCI may also include code block group identification indicating scheduling at CBG granularity. Correspondingly, the second terminal device feeds back information to the first terminal device by taking the CBGs as granularity, that is, one piece of feedback information corresponds to one CBG. In this scenario, the data block described in the embodiment of the present application is a CBG.

If the code block group identity is not included in the SCI, scheduling is performed with TB as granularity. Correspondingly, the second terminal device feeds back information to the first terminal device by taking the TB as granularity, that is, one piece of feedback information corresponds to one TB. In this scenario, the data block described in the embodiment of the present application is TB.

Step 702, the first terminal device sends at least two data blocks to the second terminal device.

Specifically, the first terminal device may transmit the at least two data blocks to the second terminal device through the sidelink resource indicated by the SCI.

Step 703, the second terminal sends first feedback multiplexing information to the first terminal, where the first feedback multiplexing information is multiplexing information of feedback information for each data block of the at least two data blocks on the sidelink SL.

In a specific implementation, after receiving the SCI from the first terminal device, the second terminal device may determine the sidelink feedback resource of the data block according to the sidelink resource of the data block indicated by the SCI. And then, it can be determined which data blocks of the feedback information can be sent on the same sidelink feedback resource, that is, which data blocks of the feedback information can be feedback multiplexed.

In addition, the second terminal device may further determine feedback information of each of the at least two data blocks, and fill the feedback information of each data block in a corresponding position in the first feedback multiplexing information.

In a possible implementation manner, the second terminal device may determine, according to the first information in the SCI corresponding to each data block, a position of the feedback information of the data block in the first feedback multiplexing information.

Assuming that the second terminal device determines that the feedback information of S0, S1, S2 may be transmitted on the same sidelink feedback resource, the multiplexing information of the feedback information of S0, S1, S2 may be referred to as first feedback multiplexing information, the first feedback multiplexing information may be 3-bit information, and a position in the first feedback multiplexing information may be indicated with 2 bits. Illustratively, "00" represents the high order bits of the first feedback multiplexing information, "01" represents the middle 1 bit of the first feedback multiplexing information, and "10" represents the low order bits of the first feedback multiplexing information.

Referring to fig. 8, the first information in the SCI corresponding to S0 is "00", and the second terminal device successfully receives S0, the feedback information of S0 may be "1", and "1" is filled in the high bits of the first feedback information. The first information in the SCI corresponding to S1 is "10", and the second terminal device has not successfully received S1, the feedback information of S1 may be "0", and "0" is padded in the low bit of the first feedback information. The first information in the SCI corresponding to S2 is "01", and the feedback information of S2 and S2 successfully received by the second terminal device may be "1", and "1" fills one bit in the middle of the first feedback information.

In another possible implementation manner, the second terminal device may determine, according to the second information in the SCI corresponding to each data block, a position of the feedback information of the data block in the first feedback multiplexing information. Wherein, the SCI corresponding to the data block can be understood as the SCI used for scheduling the sideline transmission corresponding to the data block. For example, SCI 1 is used for scheduling PSSCH1, and PSSCH1 is used for transmitting data block 1 and data block 2, it is understood that the SCI corresponding to data block 1 and data block 2 is SCI 1.

Assuming that the second terminal device determines that the feedback information of the data blocks S0, S1, S2 may be transmitted on the same sidelink feedback resource, the multiplexing information of the feedback information of the data blocks S0, S1, S2 may be referred to as first feedback multiplexing information, which may be 3-bit information. The second terminal device may determine, according to the second information in the SCI, that the sideline transmission corresponding to the data block is the several scheduled sideline transmissions, and further determine, in combination with the first mapping rule, a position of the feedback information of the data block in the first feedback multiplexing information. And the side line transmission corresponding to the data block is one side line transmission for transmitting the data block.

It should be noted that the first mapping rule is a rule agreed in advance between the first terminal device and the second terminal device to be followed when mapping multiple pieces of feedback information on the same sidelink feedback resource. For example, the first mapping rule may be: the feedback information of the data blocks is mapped according to the scheduling order of the first terminal device for scheduling the sideline transmission, that is, the scheduling order of the sideline transmission of the first terminal device determines the position of the feedback information of the data blocks in the first feedback multiplexing information.

Specifically, assume that the SCI indicates scheduling at the granularity of CBGs, and a code block group identity (e.g., CBGTI) in the SCI indicates that one TB includes N CBGs. The same sidelink feedback resource is used for transmitting feedback information corresponding to Y sidelines transmission, and the first feedback multiplexing information is information for multiplexing the feedback information corresponding to the Y sidelines transmission. Assuming that SCI 1 is used to schedule the ith sidelink transmission of the Y sidelink transmissions and the ith sidelink transmission is used to transmit M TBs, the ith sidelink transmission corresponds to M × N data blocks (CBGs), and the feedback information corresponding to the ith sidelink transmission is (M × N) bit information. The second terminal device may determine the position of the (M × N) bit information in the first feedback multiplexing information according to the second information in SCI 1.

Assuming that the TB is used as the granularity for scheduling, the same sidelink feedback resource is used for transmitting feedback information corresponding to the Y sidelink transmissions, and the first feedback multiplexing information is information for multiplexing the feedback information corresponding to the Y sidelink transmissions. Assuming that SCI 1 is used to schedule the ith sidelink transmission of the Y sidelink transmissions and the ith sidelink transmission is used to transmit M TBs, the ith sidelink transmission corresponds to M data blocks (CBGs), and the feedback information corresponding to the ith sidelink transmission is M-bit information. The second terminal device may determine the position of the M-bit information in the first feedback multiplexing information according to the second information in SCI 1.

Furthermore, if the second information of Y side row transmissions corresponding to the same side row feedback resource is sequentially {0, 1, 2 … Y-1}, and the second terminal device does not receive the DCI indicating "i", it is determined that all data blocks corresponding to the ith scheduled side row transmission are lost, and (M × N) 0's or M0's are filled in the position corresponding to the xth scheduled side row transmission in the first feedback multiplexing information.

Step 704, the first terminal device receives the first feedback multiplexing information from the second terminal device.

In a specific implementation, the first terminal device may receive the first feedback multiplexing information on the sidelink feedback resources corresponding to the at least two data blocks. Parsing the first feedback multiplexing information may determine feedback information for each of the at least two data blocks.

Specifically, the second terminal device may determine, according to the first information or the second information in the SCI corresponding to each data block, a position of the feedback information of the data block in the first feedback multiplexing information, so as to determine the feedback information of the data block at the corresponding position.

For example, the first terminal device sends three data blocks S0, S1, and S2 to the second terminal device, and the feedback information of S0, S1, and S2 is fed back on the same sidelink resource R0, the information multiplexed with the feedback information of S0, S1, and S2 is referred to as first feedback multiplexing information, and the first feedback multiplexing information may be a 3-bit sequence. The position in the first feedback multiplexing information may be indicated with 2 bits. Illustratively, "00" represents 1 high bit in the first feedback multiplexing information, "01" represents 1 middle bit in the first feedback multiplexing information, and "10" represents 1 low bit in the first feedback multiplexing information.

Assuming that SCI 1 is used for scheduling S1, and the first information in SCI 1 is "10", indicating that the feedback information of S1 occupies 1 low bit in the first feedback multiplexing information, after the first terminal device receives the 3-bit first feedback multiplexing information from the second terminal device, it may be determined that 1 bit in the middle of the first feedback multiplexing information is the feedback information of S1.

Alternatively, the second information in SCI 1 indicates "2", i.e., S1 is the 2 nd scheduled data block of the three data blocks S0, S1 and S2, and the feedback information of S1 may occupy the 2 nd bit in the first feedback multiplexing information. After the first terminal device receives the 3-bit first feedback multiplexing information from the second terminal device, it may be determined that the 2 nd bit of the first feedback multiplexing information is the feedback information of S1. The 2 nd bit of the first feedback multiplexing information may be the 2 nd bit from high to low of the first feedback multiplexing information, or may be the 2 nd bit from low to high.

Optionally, if the feedback information of the data block is NACK, the first terminal device may further allocate retransmission resources for the data block.

Specifically, the first terminal device corresponds to one or more data blocks through the sideline transmission scheduled by the SCI, i.e., one sideline transmission is used for transmitting one or more data blocks. The following is presented in two cases:

first, one SCI schedules one data block, i.e., one sidelink data block corresponds to one sidelink transmission, and the feedback information of one sidelink transmission may be 1 bit.

In this embodiment of the present application, a first terminal device sends at least two data blocks to a second terminal device, and then the first terminal device sends at least two SCIs to the second terminal device, where the at least two data blocks and the at least two SCIs are in one-to-one correspondence. Illustratively, a first terminal device sends M SCIs to a second terminal device to schedule M data blocks. Wherein, one SCI of the M SCIs can indicate sidelink resources of one data block, and M is an integer greater than or equal to 2.

Second, one SCI schedules multiple data blocks, i.e., one sidelink transmission corresponds to multiple sidelink data blocks, and the feedback information of one sidelink transmission may be multiple bits.

In this embodiment of the present application, a first terminal device sends at least two data blocks to a second terminal device, and then the number of SCIs sent by the first terminal device to the second terminal device is smaller than the number of data blocks. Illustratively, a first terminal device sends N SCIs to a second terminal device to schedule M data blocks. Wherein one SCI of the N SCIs may indicate sidelink resources of the plurality of data blocks, N being an integer less than or equal to M.

Specific contents indicated by the first information, the second information, and the third information are described below for the two scheduling manners, respectively:

example 1-1 in a first scheduling approach, one SCI schedules one data block, and first information in the SCI is used to indicate the position of 1-bit feedback information in feedback multiplexing information.

For example, referring to fig. 9, the first terminal device sends three data blocks S0, S1, and S2 to the second terminal device, and the feedback information of S0, S1, and S2 is fed back on the same sidelink resource R0, the information multiplexed with the feedback information of S0, S1, and S2 is referred to as first feedback multiplexing information, and the first feedback multiplexing information may be a 3-bit sequence. The first terminal device sends SCI 1 to the second terminal device, SCI 1 being used for scheduling S0. The first information in SCI 1 is used to indicate the position of the feedback information of S0 in the first feedback multiplexing information, for example, the feedback information of S0 is "0", and the first information in SCI 1 may indicate the position of "0" in the above-mentioned 3-bit sequence.

The first terminal device sends SCI2 to the second terminal device, SCI2 being used for scheduling S1. The first information in SCI2 is used to indicate the position of the feedback information of S1 in the first feedback multiplexing information. For example, the feedback information of S1 is "1", and the first information in SCI2 may indicate the position of "1" in the above-mentioned 3-bit sequence.

The first terminal device sends SCI3 to the second terminal device, SCI3 being used for scheduling S2. The first information in SCI3 is used to indicate the position of the feedback information of S2 in the first feedback multiplexing information. For example, the feedback information of S2 is "0", and the first information in SCI3 may indicate the position of "0" in the above-mentioned 3-bit sequence.

Example 1-2, a first scheduling approach, one SCI schedules one data block, one sidelink transmission corresponds to one data block. The second information in the SCI may indicate an accumulated number of scheduled transport blocks including one data block scheduled by the SCI by a time unit in which the first terminal device transmits the SCI. It will be appreciated that the cumulative number of scheduled data blocks indicated by the SCI is equal to the cumulative number of scheduled sideline transmissions.

For example, referring to fig. 10, the first terminal device sends three data blocks S0, S1, S2 to the second terminal device, and the feedback information of S0, S1, S2 is fed back on the same sidelink resource R0. The first terminal device sends SCI 1 to the second terminal device at slot0, SCI 1 being used for scheduling S1. The second information in SCI 1 is used to indicate the cumulative number of scheduled transmissions by the deadline slot 0. In the data block corresponding to sidelink resource R0, S0 is the first scheduled transmission. Thus, the second information in SCI 1 indicates "1", i.e., the cumulative number of scheduled transmissions by the deadline slot0 is 1.

The first terminal device sends SCI2 to the second terminal device at slot1, SCI2 being used for scheduling S1. The second information in SCI2 is used to indicate the cumulative number of scheduled transmissions by the deadline slot 1. In the data block corresponding to sidelink resource R0, S1 is the second scheduled transmission. Thus, the second information in SCI2 indicates "2", i.e., the cumulative number of scheduled transmissions by the deadline slot1 is 2.

The first terminal device sends SCI3 to the second terminal device at slot2, SCI3 being used for scheduling S2. The second information in SCI3 is used to indicate the cumulative number of scheduled transmissions by the deadline slot 2. In the data block corresponding to sidelink resource R0, S2 is the third scheduled transmission. Thus, the second information in SCI3 indicates "3", i.e., the cumulative number of scheduled transmissions by the deadline slot2 is 3.

Examples 1-3, a first scheduling manner, wherein one SCI schedules one data block, and third information in the SCI is used to indicate a time unit by which the first terminal device transmits the SCI, including a total number of transmission times that the SCI schedules the one data block should be scheduled.

For example, referring to fig. 11, the first terminal device sends three data blocks S0, S1, S2 to the second terminal device, and the feedback information of S0, S1, S2 is fed back on the same sidelink resource R0. The first terminal device sends SCI 1 to the second terminal device at slot0, SCI 1 being used for scheduling S1. The third information in SCI 1 is used to indicate the total number of transmission times that the slot0 should be scheduled to expire. In the data block corresponding to the sidelink resource R0, S0 and S1 are scheduled in slot0, and therefore, the third information in SCI 1 indicates "2", that is, the total number of transmission times that the slot0 should be scheduled is 2.

The first terminal device sends SCI2 to the second terminal device at slot0, SCI2 being used for scheduling S1. The third information in SCI2 is used to indicate the total number of transmissions that should be scheduled by the slot 0. In the data block corresponding to the sidelink resource R0, S0 and S1 are scheduled in slot0, and therefore, the third information in SCI2 indicates "2", that is, the total number of transmission times that the slot0 should be scheduled is 2.

The first terminal device sends SCI3 to the second terminal device at slot1, SCI3 being used for scheduling S2. The third information in SCI3 is used to indicate the total number of transmissions that should be scheduled by the slot 1. In the data block corresponding to the sidelink resource R0, S0 and S1 are scheduled at slot0, and S2 is scheduled at slot 1. Thus, the third information in SCI3 indicates "3", i.e., the total number of transmissions that the deadline slot0 should be scheduled is 3.

Example 2-1, in a second scheduling manner, one SCI schedules a plurality of data blocks, where first information in the SCI is used to indicate a position of N-bit feedback information in feedback multiplexing information, and N is an integer greater than or equal to 2 and indicates a number of data blocks corresponding to one-time sideline transmission scheduled by the SCI.

For example, referring to fig. 12, the first terminal device sends four data blocks S0, S1, S2, and S3 to the second terminal device, and the feedback information of S0, S1, S2, and S3 is fed back on the same sidelink resource R0, the information multiplexed with the feedback information of S0, S1, S2, and S3 is referred to as first feedback multiplexing information, and the first feedback multiplexing information may be a 4-bit sequence. The first terminal device sends SCI 1 to the second terminal device, SCI 1 being used for scheduling S0, S1. The first information in SCI 1 is used to indicate the position of the feedback information of S0, S1 in the first feedback multiplexing information, for example, the feedback information of S0, S1 is "0, 1", and the first information in SCI 1 may indicate the position of "0, 1" in the above-mentioned 4-bit sequence.

The first terminal device sends SCI2 to the second terminal device, SCI2 being used for scheduling S2, S3. The first information in SCI2 is used to indicate the position of the feedback information of S2, S3 in the first feedback multiplexing information. For example, the feedback information of S2, S3 is "1, 0", and the first information in SCI2 may indicate the position of "1, 0" in the above-mentioned 4-bit sequence.

Example 2-2, a second scheduling approach, where one SCI schedules multiple data blocks, and a sidelink transmission corresponds to multiple data blocks. The second information in the SCI is used to indicate the cumulative number of scheduled sideline transmissions by the time unit in which the first terminal device transmitted the SCI. It will be appreciated that the cumulative number of scheduled data blocks is greater than the cumulative number of scheduled sideline transmissions.

For example, referring to fig. 13, the first terminal device sends four data blocks S0, S1, S2, S3 to the second terminal device, and the feedback information of S0, S1, S2, S3 is fed back on the same sidelink resource R0. The first terminal device sends SCI 1 to the second terminal device at slot0, SCI 1 being used for scheduling S0, S1. The second information in SCI 1 is used to indicate the cumulative number of sideline transmissions scheduled by the slot 0. Of the data blocks corresponding to the sidelink resource R0, S0 and S1 are the data blocks corresponding to the first scheduled sidelink transmission. Thus, the second information in SCI 1 indicates "1", i.e., the cumulative number of sideline transmissions scheduled by slot0 is 1.

The first terminal device sends SCI2 to the second terminal device at slot1, SCI2 being used for scheduling S2, S3. The second information in SCI2 is used to indicate the cumulative number of scheduled transmissions by the deadline slot 1. Of the data blocks corresponding to sidelink resource R0, S2 and S3 are data blocks corresponding to the second scheduled sidelink transmission. Thus, the second information in SCI2 indicates "2", i.e., the cumulative number of sideline transmissions scheduled by slot1 is 2.

Example 2-3, a second scheduling manner, one SCI schedules a plurality of data blocks, and third information in the SCI is used to indicate a total number of scheduled sidelink transmission times by a time unit when the first terminal device transmits the SCI.

For example, referring to fig. 14, the first terminal device sends four data blocks S0, S1, S2, S3 to the second terminal device, and the feedback information of S0, S1, S2, S3 is fed back on the same sidelink resource R0. The first terminal device sends SCI 1 to the second terminal device at slot0, SCI 1 being used for scheduling data blocks S0, S1. The third information in SCI 1 is used to indicate the total number of sidelink transmissions that should be scheduled by slot 0. The third information in SCI 1 indicates "2", i.e., the total number of sideline transmission times that the deadline slot0 should be scheduled is 2, indicating two sideline transmissions, which correspond to data blocks S0, S1, S2, S3.

Assuming that SCI2 is sent at slot0 and SCI2 is used to schedule data blocks S2, S3, the third information in SCI2 indicates "2", i.e., the total number of sideline transmissions that should be scheduled by slot0 is 2, indicating two sideline transmissions, which correspond to data blocks S0, S1, S2, S3.

It should be noted that, based on different implementations of the first information (refer to example 1-1 and example 2-1 above), the second terminal device may determine the position of the feedback information of the data block in the first feedback multiplexing information in two different ways:

example 3-1, one SCI schedules one data block, first information in the SCI is used to indicate a position of feedback information of one data block in feedback multiplexing information, and a second terminal device may determine the position of the feedback information of one data block in the feedback multiplexing information according to the one SCI.

For example, the first terminal device sends three data blocks S0, S1, and S2 to the second terminal device, and the feedback information of S0, S1, and S2 is fed back on the same sidelink resource R0, the information multiplexed with the feedback information of S0, S1, and S2 is referred to as first feedback multiplexing information, and the first feedback multiplexing information may be a 3-bit sequence. The position in the first feedback multiplexing information may be indicated with 2 bits. Illustratively, "00" represents 1 high bit in the first feedback multiplexing information, "01" represents 1 middle bit in the first feedback multiplexing information, and "10" represents 1 low bit in the first feedback multiplexing information. In the embodiment of the present application, the bits on the left side of the bit information are referred to as high bits, and the bits on the right side are referred to as low bits.

Assuming SCI 1 is used for scheduling S1, the first information in SCI 1 is "10", indicating that the feedback information of S1 occupies 1 low bit in the first feedback multiplexing information.

Example 3-2, one SCI schedules one data block, first information in the SCI is used to indicate a position of feedback information of one data block in the feedback multiplexing information, and the second terminal device may determine the positions of the feedback information of a plurality of data blocks in the feedback multiplexing information according to the one SCI.

Assuming that SCI 1 is used for scheduling S1, S2, the first information in SCI 1 is "10", indicating that the feedback information of S1, S2 occupies the lower 2 bits in the first feedback multiplexing information.

It should be noted that, based on different implementations of the second information (refer to the above examples 1-2 and 2-2), the second terminal device may determine the position of the feedback information of the data block in the first feedback multiplexing information in two different ways:

example 4-1, one SCI schedules one data block, and the second information in the SCI may further indicate a cumulative number of scheduled transmissions including the one data block scheduled by the SCI by a time unit in which the first terminal device transmits the SCI. The second terminal device may determine a position of feedback information of one data block in the feedback multiplexing information according to one SCI.

For example, the first terminal device sends three data blocks S0, S1, and S2 to the second terminal device, and the feedback information of S0, S1, and S2 is fed back on the same sidelink resource R0, the information multiplexed with the feedback information of S0, S1, and S2 is referred to as first feedback multiplexing information, and the first feedback multiplexing information may be a 3-bit sequence.

Assuming SCI 1 is used for scheduling S1, the second information in SCI 1 indicates "2", i.e., S1 is the 2 nd scheduled data block of the three data blocks S0, S1, and S2, and the feedback information of S1 may occupy the 2 nd bit in the first feedback multiplexing information.

Example 4-2, one SCI schedules a plurality of data blocks, and second information in the SCI indicates a cumulative number of scheduled sideline transmission times by a time unit in which the first terminal device transmits the SCI. The second terminal device may determine, according to one SCI, a position of feedback information of a plurality of data blocks corresponding to one-time sidelink transmission scheduled by the SCI in the feedback multiplexing information.

Assume SCI 1 is used for scheduling S0, S1 and SCI2 is used for scheduling S2. The second information in SCI 1 indicates "1", i.e., S0, S1 are data blocks corresponding to the 1 st transmission corresponding to sidelink resource R0, and the 1 st transmission corresponds to 2 bits of feedback information, i.e., S0, S1. The feedback information of S0, S1 may occupy the lower 2 bits in the first feedback multiplexing information.

An embodiment of the present application provides a method for multiplexing feedback information, which is applicable to a mode-1, and as shown in fig. 15, the method includes the following steps:

1501. the network device transmits the DCI to the first terminal device.

Under mode1, when a first terminal device needs to send data to a second terminal device, it needs to report a BSR to a network device, and the network device may allocate sidelink resources according to the BSR reported by the first terminal device. The network device may send the DCI to the first terminal device indicating the sidelink resources. The data block may be a TB or a CBG.

On the Uu link, the network device may also map the feedback information of multiple sidelink data blocks and the feedback information of the downlink data block to the same uplink resource for transmission. The multiplexing information of the feedback information of the multiple sidelink data blocks and the feedback information of the downlink data block is the second feedback multiplexing information described in the embodiment of the present application.

The sidelink data block is a data block on a sidelink, for example, a data block transmitted by a first terminal device to a second terminal device. The downlink data block is a data block on the Uu link, for example, a data block transmitted by the network device to the first terminal device.

In a specific implementation, the DCI may include fourth information, fifth information, and sixth information. The fourth information is used for indicating the position of the feedback information of the data block scheduled by the DCI corresponding to the fourth information in the second feedback multiplexing information.

For example, feedback information of M data blocks is feedback-multiplexed on the same sidelink feedback resource, the first feedback information may be a sequence with a length of M bits, and the fourth feedback information may be a sequence with a length of M bits

And the binary sequence of the bits represents M bits in the first feedback multiplexing information. For example, feedback information of 4 data blocks is feedback-multiplexed on the same sidelink feedback resource, the first feedback multiplexing information may be 4-bit information, and the fourth information may be 2-bit information. Where "00" represents a first bit in the first feedback multiplexing information, "01" represents a second bit in the first feedback multiplexing information, "10" represents a third bit in the first feedback multiplexing information, and "11" represents a fourth bit in the first feedback multiplexing information.

The fifth information is used for indicating the cumulative number (cumulative number) of scheduled transmission times in downlink transmission corresponding to the same uplink feedback resource by the third time unit; the transmission here may be a sideline transmission, or a sideline transmission and a downlink transmission.

The third time unit is a time unit for the network device to send the DCI corresponding to the fifth information. In a specific implementation, the network device counts a plurality of transmissions corresponding to the same uplink feedback resource, and determines the cumulative number of times of transmission scheduled by the third time unit, where the transmission may be a sidelink transmission, or a sidelink transmission and a downlink transmission. The number of scheduled transmissions may be considered the number of pschs and/or PDCCHs that are scheduled, one psch or one PDCCH at a time. The cumulative number of transmissions, i.e., how many transmissions are cumulatively scheduled. The fifth information may be a cDAI field described in the embodiments of the present application.

One downlink transmission may be considered that the base station transmits one PDSCH to the terminal device, and the scheduled downlink transmission may be considered as a scheduled PDSCH. A sidestream transmission may be considered to be a terminal device transmitting a psch to the terminal device, and a scheduled sidestream transmission may be considered to be a scheduled psch.

In the embodiment of the present application, downlink transmission may be equivalent to PDSCH, and sidelink transmission may be equivalent to pscch. Assuming that data blocks corresponding to multiple times of sidelink transmission and downlink transmission need to send corresponding feedback information on the same uplink feedback resource, the sidelink transmission and the downlink transmission are considered to be downlink transmission corresponding to the uplink feedback resource. Or, assuming that multiple sidelink transmission data blocks need to send corresponding feedback information on the same uplink feedback resource, the data blocks corresponding to the sidelink transmissions are considered as downlink transmissions corresponding to the uplink feedback resource.

The sixth information is for indicating a total number of scheduled transmission times (total number) by the fourth time unit; the transmission here may be a sideline transmission, or a sideline transmission and a downlink transmission. The total number of transmissions, i.e. how many transmissions are scheduled in total. The transmission here may be a sideline transmission, or a sideline transmission and a downlink transmission.

The fourth time unit is a time unit for the network device to send the DCI corresponding to the sixth information. In a specific implementation, the network device counts a plurality of transmissions corresponding to the same uplink feedback resource, and determines the cumulative number of transmission times scheduled by the fourth time unit. The sixth information may be a tDAI field described in the embodiments of the present application.

In addition, the DCI may further include side link resource information indicating side link resources. The sidelink resource is used for transmitting the data block scheduled by the DCI.

The DCI may further include a code block group identity indicating scheduling with CBG as granularity. Correspondingly, the second terminal device feeds back information to the first terminal device by taking the CBGs as granularity, that is, one piece of feedback information corresponds to one CBG. In this scenario, the data block described in the embodiment of the present application is a CBG.

And if the code block group identification is not included in the DCI, scheduling by taking the TB as granularity. Correspondingly, the second terminal device feeds back information to the first terminal device by taking the TB as granularity, that is, one piece of feedback information corresponds to one TB. In this scenario, the data block described in the embodiment of the present application is TB.

Step 1502, the first terminal device receives DCI from the network device and sends SCI to the second terminal device.

And the binary sequence of the bits represents M bits in the first feedback multiplexing information. For example, feedback information of 4 data blocks is feedback-multiplexed on the same sidelink feedback resource, the first feedback multiplexing information may be 4-bit information, and the first information may be 2-bit information. Where "00" represents a first bit in the first feedback multiplexing information, "01" represents a second bit in the first feedback multiplexing information, "10" represents a third bit in the first feedback multiplexing information, and "11" represents a fourth bit in the first feedback multiplexing information。

The second information is used for indicating the cumulative number (cumulative number) of scheduled sideline transmission times in the sideline transmission corresponding to the same sideline link feedback resource by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information. In a specific implementation, the first terminal device counts a plurality of sidelink transmissions corresponding to the same sidelink feedback resource, and determines an accumulated number of times of sidelink transmissions scheduled by the first time unit. The cumulative number of sideline transmissions, i.e., how many sideline transmissions are cumulatively scheduled.

The second information may be a cDAI field as described in the embodiments of the present application.

The primary sidelink transmission may be regarded as that the first terminal device transmits a physical sidelink shared channel (pscch) to the second terminal device, and the scheduled sidelink transmission may be regarded as a scheduled pscch. In the embodiment of the present application, the sidelink transmission may be an equivalent concept to the psch. Assuming that data blocks transmitted by multiple sidelink transmissions need to send corresponding feedback information on the same sidelink feedback resource, the sidelink transmissions are considered to be the sidelink transmissions corresponding to the sidelink feedback resource.

Step 1503, the first terminal device sends at least two data blocks to the second terminal device.

Specifically, the first terminal device may transmit the at least two data blocks to the first terminal device through the sidelink resource indicated by the DCI or the SCI.

Step 1504, the second terminal sends first feedback multiplexing information to the first terminal, where the first feedback multiplexing information is feedback information for each data block of the at least two data blocks on the sidelink SL.

The specific implementation manner refers to the related description of the foregoing step 703, and is not described herein again.

Step 1505, the first terminal receives the first feedback multiplexing information, and obtains the feedback information of the at least two data blocks.

1506. And the first terminal equipment sends the second feedback multiplexing information to the network equipment.

The second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks and feedback information of a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks.

In addition, the first terminal device may further fill the feedback information of each of the at least two data blocks in a corresponding position in the first feedback multiplexing information.

In a possible implementation manner, the first terminal device may determine, according to the fourth information in the DCI corresponding to each data block, a position of the feedback information of the data block in the second feedback multiplexing information.

Assuming that the first terminal device determines that the feedback information of S0, S1, S2 may be transmitted on the same uplink feedback resource, the multiplexing information of the feedback information of S0, S1, S2 may be referred to as second feedback multiplexing information, the second feedback multiplexing information may be 3-bit information, and a position in the second feedback multiplexing information may be indicated with 2 bits. Illustratively, "00" represents the high order bits of the second feedback multiplexing information, "01" represents the middle 1 bit of the second feedback multiplexing information, and "10" represents the low order bits of the second feedback multiplexing information.

Referring to fig. 16, the fourth information in the DCI1 corresponding to S0 is "00", and the first terminal device successfully receives S0, and the feedback information of S0 may be "1" and "1" filled in the upper bits of the first feedback information. The fourth information in the DCI2 corresponding to S1 is "10", and the first terminal device has not successfully received S1, and the feedback information of S1 may be "0", and "0" is padded in the low bits of the first feedback information. The fourth information in the DCI corresponding to S2 is "01", and the first terminal device successfully receives S2, the feedback information of S2 may be "1", and "1" fills one bit in the middle of the first feedback information.

In another possible implementation manner, the first terminal device may determine, according to fifth information in the DCI corresponding to each data block, a position of the feedback information of the data block in the second feedback multiplexing information.

Assuming that the first terminal device determines that the feedback information of S0, S1, S2 may be transmitted on the same uplink feedback resource, the multiplexing information of the feedback information of S0, S1, S2 may be referred to as second feedback multiplexing information, which may be 3-bit information. The first terminal device may determine that the data block is the second scheduled transmission according to the fifth information in the DCI, and further determine, in combination with the second mapping rule, a position of the feedback information of the data block in the second feedback multiplexing information.

It should be noted that the second mapping rule is a rule agreed in advance between the first terminal device and the network device to be followed when mapping multiple pieces of feedback information on the same uplink feedback resource. For example, the second mapping rule may be: and mapping the feedback information of the data blocks according to the sequence of the data blocks scheduled by the network equipment, namely determining the position of the feedback information of the data blocks in the second feedback multiplexing information according to the sequence of the data blocks scheduled by the network equipment.

Specifically, assume that the DCI indicates scheduling at the granularity of CBGs, and a code block group identity (e.g., CBGTI) in the DCI indicates that one TB includes N CBGs. The same uplink feedback resource is used for transmitting feedback information corresponding to the Y downlink transmissions, and the second feedback multiplexing information is information for multiplexing the feedback information corresponding to the Y downlink transmissions. Assuming that DCI1 is used to schedule the ith side row transmission of the Y side row transmissions and the ith side row transmission is used to transmit M TBs, the ith side row transmission corresponds to M × N data blocks (CBGs), and the feedback information corresponding to the ith side row transmission is (M × N) bit information. The first terminal device may determine the position of the (M × N) bit information in the second feedback multiplexing information according to the fifth information in the DCI 1.

Assuming that the TB is used as the granularity for scheduling, the same uplink feedback resource is used for transmitting feedback information corresponding to the transmission of Y side rows, and the second feedback multiplexing information is information for multiplexing the feedback information corresponding to the transmission of the Y side rows. Assume that DCI1 is used to schedule the ith side row transmission of the Y side row transmissions, and the ith side row transmission is used to transmit M TBs, so the ith side row transmission corresponds to M data blocks (CBGs), and the feedback information corresponding to the ith side row transmission is M-bit information. The first terminal device may determine the position of the M-bit information in the second feedback multiplexing information according to fifth information in DCI 1.

In the following, with reference to specific examples, it is assumed that one SCI schedules one data block and one DCI schedules one data block. How to implement multiplexing of feedback information (e.g., HARQ feedback information) in the NR-V2X scenario according to the cDAI field (i.e., the fifth information described in the embodiments of the present application) in the DCI and the cDAI field (i.e., the second information described in the embodiments of the present application) in the SCI is described.

Referring to FIG. 17, the UE supports mode-1 only. If HARQ multiplexing feedback is performed on the downlink data block D0 and the sidelink data blocks S0, S1 and S2 on the same uplink feedback resource U0, the scheduling order of the base stations is D0, S0, S1 and S2. Assuming that DCI of network device schedules D0, S0, S1 and S2 are DCI1, DCI2, DCI 3 and DCI 4, cDAI fields of DCI1, DCI2, DCI 3 and DCI 4 indicate (1), (2), (3) and (4), respectively, D0 is a first scheduled data block in a data block corresponding to U0, S0 is a second scheduled data block in a data block corresponding to U0, S1 is a third scheduled data block in a data block corresponding to U0, and S2 is a fourth scheduled data block in a data block corresponding to U0.

Assuming that the HARQ information of S0 and S2 are fed back on the same sidelink feedback resource R0, the HARQ information of S1 is fed back on the sidelink feedback resource R1 of the UE 2. The UE1 sends SCI 1, SCI2, SCI3 to the UE2 for scheduling S0, S1, S2, respectively. Wherein, the cDAI in SCI 1 and SCI3 indicates (1) and (2), respectively, that is, S0 is the first scheduled data block in the data block corresponding to R0, and S1 is the second scheduled data block in the data block corresponding to R0; the cDAI field in SCI2 indicates (1), respectively, and S2 is the first scheduled data block in the data block corresponding to R1.

The UE2 performs feedback multiplexing on R0, R1 according to the cDAI field in SCI 1, SCI2, SCI3 and the first mapping rule. Assume that the first mapping rule is: the ith scheduled data block occupies the ith bit of the feedback multiplexing information. Multiplexing information of HARQ information of S0 and S2 is fed back on the sidelink feedback resource R0, and if S0 is unsuccessfully received and S2 is successfully received, the multiplexing information fed back on the sidelink feedback resource R0 is "01". Multiplexing information of HARQ information of S1 is fed back on the sidelink feedback resource R1, and assuming that S1 is successfully received, the multiplexing information fed back on the sidelink feedback resource R1 is "1".

The UE1 obtains HARQ feedback information of S0, S1, S2 at R0, R1 according to the cDAI field in SCI 1, SCI2, SCI3 and the first mapping rule. Multiplexing information "01" of the HARQ information of S0, S2 is acquired on the sidelink feedback resource R0, and it may be determined that the HARQ feedback information of S0 is "0" and the HARQ feedback information of S2 is "1" according to the first mapping rule. Multiplexing information "1" of the HARQ information of S1 is acquired on the sidelink feedback resource R1, and it may be determined that the HARQ feedback information of S1 is "1" according to the first mapping rule.

The UE1 performs feedback multiplexing on U0 according to the cDAI field in DCI1, DCI2, DCI 3, DCI 4, and the second mapping rule. Assume that the second mapping rule is: the ith scheduled data block occupies the ith bit of the feedback multiplexing information. The multiplexing information of the HARQ information of D0, S0, S1, S2 is fed back on the sidelink feedback resource U0, and before that, the UE1 determines that the HARQ feedback information of S0 is "0", the HARQ feedback information of S1 is "1", the HARQ feedback information of S2 is "1", and assuming that D0 is not successfully received, the HARQ feedback information of D0 is "0". The multiplexing information fed back on the uplink feedback resource U0 is "0011".

Referring to fig. 18, a tDAI field may be carried in DCI, SCI. Assuming that DCI1 and DCI2 are transmitted at slot0, DCI 3 and DCI 4 are transmitted at slot1, and tDAI fields of DCI1, DCI2, DCI 3 and DCI 4 indicate (2), (4) and (4), respectively. That is, slot0 is cut, two data blocks should be scheduled in the data block corresponding to U0, four data blocks should be scheduled in the data block corresponding to slot1 and U0.

Assuming that the HARQ information of S0 and S2 are fed back on the same sidelink feedback resource R0, the HARQ information of S1 is fed back on the sidelink feedback resource R1 of the UE 2. SCI 1 and SCI3 are transmitted at slot2, and SCI2 is transmitted at slot 3. The tDAI in SCI 1 and SCI3 indicates that two data blocks should be scheduled out of the data blocks corresponding to (2) and (2), i.e., slot2, R0, respectively. The tDAI in SCI2 indicates that (1), i.e., slot3 is cut, and one of the data blocks corresponding to R1 should be scheduled, respectively.

Referring to FIG. 19, the UE supports mode-1 only and mode-2. If HARQ multiplexing feedback is performed on the downlink data D0 and the sidelink data S0, S1 and S2 on the same uplink feedback resource U0, the scheduling sequence of the base stations is D0, S0, S1 and S2. Assuming that DCI of network device schedules D0, S0, S1 and S2 are DCI1, DCI2, DCI 3 and DCI 4, cDAI fields of DCI1, DCI2, DCI 3 and DCI 4 indicate (1), (2), (3) and (4), respectively, D0 is a first scheduled data block in a data block corresponding to U0, S0 is a second scheduled data block in a data block corresponding to U0, S1 is a third scheduled data block in a data block corresponding to U0, and S2 is a fourth scheduled data block in a data block corresponding to U0.

Suppose S3 is a data block scheduled by UE1 in mode-2, where HARQ information of S0 and S2 are fed back on the same sidelink feedback resource R0, and HARQ information of S1 and S3 are fed back on sidelink feedback resource R1 of UE 2. The UE1 sends SCI 1, SCI2, SCI3, SCI 4 to the UE2 for scheduling S0, S1, S2, S3, respectively. Wherein, the cDAI in SCI 1 and SCI3 indicates (1) and (2), respectively, that is, S0 is the first scheduled data block in the data block corresponding to R0, and S1 is the second scheduled data block in the data block corresponding to R0; the cDAI fields in SCI2 and SCI 4 indicate (1) (2), respectively, S2 is the first scheduled data block in the data block corresponding to R1, and S3 is the second scheduled data block in the data block corresponding to R1.

The UE2 performs feedback multiplexing on R0, R1 according to the cDAI field in SCI 1, SCI2, SCI3, SCI 4 and the first mapping rule. Assume that the first mapping rule is: the ith scheduled data block occupies the ith bit of the feedback multiplexing information. Multiplexing information of HARQ information of S0 and S2 is fed back on the sidelink feedback resource R0, and if S0 is unsuccessfully received and S2 is successfully received, the multiplexing information fed back on the sidelink feedback resource R0 is "01". Multiplexing information of HARQ information of S1 and S3 is fed back on the sidelink feedback resource R1, and if S1 is successfully received and S3 is not successfully received, the multiplexing information fed back on the sidelink feedback resource R1 is "10".

The UE1 obtains HARQ feedback information of S0, S1, S2, S3 at R0, R1 according to the cDAI field in SCI 1, SCI2, SCI3, SCI 4 and the first mapping rule. Multiplexing information "01" of the HARQ information of S0, S2 is acquired on the sidelink feedback resource R0, and it may be determined that the HARQ feedback information of S0 is "0" and the HARQ feedback information of S2 is "1" according to the first mapping rule. Multiplexing information "10" of the HARQ information of S1, S3 is acquired on the sidelink feedback resource R1, and it may be determined that the HARQ feedback information of S1 is "1" and the HARQ feedback information of S3 is "0" according to the first mapping rule.

The UE2 performs feedback multiplexing on U0 according to the cDAI field in DCI1, DCI2, DCI 3, DCI 4, and the second mapping rule. Assume that the second mapping rule is: the ith scheduled data block occupies the ith bit of the feedback multiplexing information. The multiplexing information of the HARQ information of D0, S0, S1, S2 is fed back on the sidelink feedback resource U0, and before that, the UE1 determines that the HARQ feedback information of S0 is "0", the HARQ feedback information of S1 is "1", the HARQ feedback information of S2 is "1", and assuming that D0 is not successfully received, the HARQ feedback information of D0 is "0". The multiplexing information fed back on the uplink feedback resource U0 is "0011".

Referring to fig. 20, a tDAI field may be carried in DCI, SCI. Assuming that DCI1 and DCI2 are transmitted at slot0, DCI 3 and DCI 4 are transmitted at slot1, and tDAI fields of DCI1, DCI2, DCI 3 and DCI 4 indicate (2), (4) and (4), respectively. That is, slot0 is cut, two data blocks should be scheduled in the data block corresponding to U0, four data blocks should be scheduled in the data block corresponding to slot1 and U0.

Assuming that the HARQ information of S0 and S2 is fed back on the same sidelink feedback resource R0, the HARQ information of S1 and S3 is fed back on the sidelink feedback resource R1 of the UE 2. SCI 1 and SCI3 are transmitted at slot2, and SCI2 is transmitted at slot 3. The tDAI in SCI 1 and SCI3 indicates that two data blocks should be scheduled out of the data blocks corresponding to (2) and (2), i.e., slot2, R0, respectively. The tDAI in SCI2 indicates that two of the data blocks corresponding to (2) (2), i.e., slot3, R1, respectively, should be scheduled.

Referring to fig. 21, the UE supports only mode-2, and the UE1 sends S0, S1, S2 to the UE 2. Assuming that the HARQ information of S0 and S2 are fed back on the same sidelink feedback resource R0, the HARQ information of S1 is fed back on the sidelink feedback resource R1 of the UE 2. The UE1 sends SCI 1, SCI2, SCI3 to the UE2 for scheduling S0, S1, S2, respectively. Wherein, the cDAI in SCI 1 and SCI3 indicates (1) and (2), respectively, that is, S0 is the first scheduled data block in the data block corresponding to R0, and S1 is the second scheduled data block in the data block corresponding to R0; the cDAI field in SCI2 indicates (1), respectively, and S2 is the first scheduled data block in the data block corresponding to R1.

Referring to fig. 22, it is assumed that HARQ information of S0 and S2 is fed back on the same sidelink feedback resource R0, and HARQ information of S1 is fed back on a sidelink feedback resource R1 of the UE 2. SCI 1 and SCI3 are transmitted at slot0, and SCI2 is transmitted at slot 1. The tDAI in SCI 1 and SCI3 indicates that two data blocks should be scheduled out of the data blocks corresponding to (2) and (2), i.e., slot0, R0, respectively. The tDAI in SCI2 indicates that there should be one of the data blocks corresponding to (1), i.e., the cut slot1, R1, respectively.

Note that, fig. 17-22 include a value in parentheses, such as (x), where x represents the cumulative number of scheduled data blocks indicated by the cDAI; a value, e.g., (x, y) is included in parentheses in fig. 17-22, where x represents the cumulative number of data blocks scheduled as indicated by the cDAI and y represents the total number of data blocks that should be scheduled as indicated by the tDAI.

Fig. 23 shows a schematic diagram of a possible structure of the communication device according to the above embodiment, in the case of dividing each functional module according to each function. The communication apparatus shown in fig. 23 may be the first terminal device or the second terminal device described in the embodiment of the present application, or may be a component of the first terminal device or the second terminal device, which implements the foregoing method. As shown in fig. 23, the communication apparatus includes a processing unit 2301 and a transmitting/receiving unit 2302. The processing unit may be one or more processors and the transceiving unit may be a transceiver.

A processing unit 2301 to support generation of second feedback multiplexing information by a first terminal device, to support generation of first feedback multiplexing information by a second terminal device, and/or to support other processes for the techniques described herein.

A transceiving unit 2302 is configured to support the first terminal device to perform steps 701 to 704, 1501 to 1506, and to support the second terminal device to perform steps 701 to 704, 1502 to 1505, and/or other processes for the techniques described herein.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In a possible implementation manner, the communication device shown in fig. 23 may also be a chip applied in a terminal. The Chip may be a System-On-a-Chip (SOC) or a baseband Chip with a communication function.

The above transceiving unit 2302 for receiving/transmitting may be an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the apparatus is implemented in a chip, the transceiver unit 2302 is an interface circuit of the chip, and the interface circuit is used for reading in or outputting a baseband signal.

For example, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in fig. 24. In fig. 24, the communication apparatus includes: a processing module 2401 and a communication module 2402. The processing module 2401 is used to control and manage actions of the communication device, e.g., perform the steps performed by the processing unit 2301 described above, and/or other processes for performing the techniques described herein. The communication module 2402 is configured to perform the steps performed by the transceiver 2302 described above, and support interaction between the communication apparatus and other devices, such as interaction with other terminal apparatuses. As shown in fig. 24, the communication device may further include a storage module 2403, the storage module 2403 being used to store program codes and data of the communication device.

When the processing module 2401 is a processor, the communication module 2402 is a transceiver, and the storage module 2403 is a memory, the communication device is the one shown in fig. 6 a.

In the case of dividing each functional module by corresponding functions, fig. 25 shows a possible configuration diagram of the communication apparatus according to the above-described embodiment. The communication apparatus shown in fig. 25 may be the network device according to the embodiment of the present application, or may be a component in the network device, which implements the method described above. As shown in fig. 25, the communication apparatus includes a processing unit 2501 and a transmitting/receiving unit 2502. The processing unit may be one or more processors and the transceiving unit may be a transceiver.

Processing unit 2501 to support network device generation of DCI, and/or other processes for the techniques described herein.

A transceiving unit 2502, configured to support communication between the network device and other communication apparatuses, for example, to support the network device to perform steps 1501 and 1506, and/or other processes for the techniques described herein.

In a possible implementation manner, the communication apparatus shown in fig. 25 may also be a chip applied in a network device. The Chip may be a System-On-a-Chip (SOC) or a baseband Chip with a communication function.

The above transceiving unit 2502 for receiving/transmitting may be an interface circuit of the apparatus for reading in the baseband signal. For example, when the apparatus is implemented in the form of a chip, the transceiver 2502 is an interface circuit of the chip for reading in a baseband signal, or the transceiver 2502 is an interface circuit of the chip for outputting a baseband signal.

For example, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in fig. 26. In fig. 26, the communication apparatus includes: a processing module 2601 and a communication module 2602. The processing module 2601 is used to control and manage actions of the communication device, e.g., to perform the steps performed by the processing unit 2501 described above, and/or other processes for performing the techniques described herein. The communication module 2602 is configured to perform the steps performed by the transceiver 2502, and support interaction between the communication apparatus and other devices, such as interaction with other terminal apparatuses. As shown in fig. 26, the communication device may also include a storage module 2603, the storage module 2603 being configured to store program codes and data for the communication device.

When the processing module 2601 is a processor, the communication module 2602 is a transceiver, and the storage module 2603 is a memory, the communication device is the communication device shown in fig. 6 b.

The embodiment of the application provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium; the instructions are for performing a method as shown in fig. 7 or fig. 15.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a communication apparatus, cause the communication apparatus to carry out a method as shown in fig. 7 or fig. 15.

An embodiment of the present application provides a wireless communication apparatus, including: instructions are stored in the wireless communication device; when the wireless communication device is operating on the communication device shown in fig. 6a, 6b, 23-26, the communication device is caused to implement the method as shown in fig. 15 or 7. The wireless communication device may be a chip or the like.

Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the database access apparatus may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed database access apparatus and method may be implemented in other ways. For example, the above-described database access device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, database access devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. 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 unit may exist alone physically, or two or more units are integrated into one 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.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip microcomputer, a chip, or the like) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure 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

A method for multiplexing feedback information, comprising:

the first terminal equipment sends at least two data blocks to the second terminal equipment; the data block is a transmission block or a group of code blocks;

the first terminal device receives first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each data block of the at least two data blocks on the sidelink SL.
The method of claim 1, further comprising:

and the first terminal equipment sends the sidelink control information SCI to the second terminal equipment.
The method of claim 2 wherein the SCI includes first information indicating a location of feedback information of SCI scheduled data blocks corresponding to the first information in the first feedback multiplexing information.
The method of claim 2 wherein the SCI includes second information indicating a cumulative number of sideline transmissions scheduled by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information.
The method of any of claims 2-4, wherein the SCI comprises a third information indicating a total number of scheduled sidelink transmissions by a second time unit; and the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information.
The method according to any one of claims 1-5, further comprising:

and the first terminal device sends second feedback multiplexing information to the network device, where the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks and feedback information of a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks.
The method of claim 6, further comprising:

and the first terminal equipment receives downlink control information DCI sent by the network equipment.
The method of claim 7, wherein the DCI comprises fourth information indicating a position of feedback information of a DCI-scheduled data block corresponding to the fourth information in the second feedback multiplexing information.
The method of claim 7, wherein the DCI includes fifth information indicating a cumulative number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
The method of any of claims 7-9, wherein the DCI comprises sixth information indicating a total number of scheduled transmissions by a fourth time unit; the fourth time unit is a time unit for the first terminal device to receive the DCI corresponding to the sixth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
A method for multiplexing feedback information, comprising:

the second terminal equipment receives at least two data blocks from the first terminal equipment; the data block is a transmission block or a group of code blocks;

and the second terminal device sends first feedback multiplexing information to the first terminal device, wherein the first feedback multiplexing information is multiplexing information of feedback information of each data block in the at least two data blocks on a sidelink SL.
The method of claim 11, further comprising:

the second terminal device receives sidelink control information SCI from the first terminal device.
The method of claim 12 wherein the SCI includes first information indicating a location of feedback information of SCI scheduled data blocks corresponding to the first information in the first feedback multiplexing information.
The method of claim 12 wherein the SCI includes second information indicating a cumulative number of sideline transmissions scheduled by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information.
The method of any of claims 11-14 wherein the SCI includes third information indicating a total number of scheduled sidelink transmissions by a second time unit; and the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information.
A method for multiplexing feedback information, comprising:

the network equipment sends downlink control information DCI to the first terminal equipment; the DCI is used for scheduling at least two data blocks on a sidelink; the data block is a transmission block or a group of code blocks;

the network device receives, from the first terminal device, second feedback multiplexing information, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.
The method of claim 16, wherein the DCI comprises fourth information indicating a position of feedback information of a DCI-scheduled data block corresponding to the fourth information in the second feedback multiplexing information.
The method of claim 16, wherein the DCI includes fifth information indicating a cumulative number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
The method of any of claims 16-18, wherein the DCI comprises sixth information indicating a total number of scheduled transmissions by a fourth time unit; the fourth time unit is a time unit for the first terminal device to receive the DCI corresponding to the sixth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
A communications apparatus, comprising:

a transceiving unit, configured to send at least two data blocks to a second terminal device; the data block is a transmission block or a group of code blocks;

the transceiver unit is further configured to receive first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information on a sidelink SL for each of the at least two data blocks.
The apparatus of claim 20, wherein the transceiving unit is further configured to transmit Sidelink Control Information (SCI) to the second terminal device.
The apparatus of claim 21 wherein the SCI includes first information indicating a location of feedback information of an SCI scheduled data block corresponding to the first information in the first feedback multiplexing information.
The apparatus of claim 21 wherein the SCI includes second information indicating a cumulative number of sideline transmissions scheduled by the first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information.
The apparatus of any of claims 21-23, wherein the SCI includes third information indicating a total number of scheduled sidelink transmissions since a second time unit; and the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information.
The apparatus according to any of claims 20-24, wherein the transceiver unit is further configured to send second feedback multiplexing information to a network device, and the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.
The apparatus of claim 25, wherein the transceiver unit is further configured to receive downlink control information DCI transmitted by the network device.
The apparatus of claim 26, wherein the DCI comprises fourth information indicating a position of feedback information of a DCI scheduled data block corresponding to the fourth information in the second feedback multiplexing information.
The apparatus of claim 26, wherein the DCI comprises fifth information indicating a cumulative number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
The apparatus of any of claims 26-28, wherein the DCI comprises sixth information indicating a total number of scheduled transmissions by a fourth time unit; the fourth time unit is a time unit for the first terminal device to receive the DCI corresponding to the sixth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
A communications apparatus, comprising:

a transceiving unit, configured to receive at least two data blocks by a first terminal device; the data block is a transmission block or a group of code blocks;

the transceiver unit is further configured to send first feedback multiplexing information to the first terminal device, where the first feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks on a sidelink SL.
The communications apparatus as claimed in claim 30, wherein the transceiver unit is further configured to receive sidelink control information SCI from the first terminal device.
The communications apparatus as claimed in claim 31, wherein the SCI includes first information indicating a position of feedback information of SCI scheduled data blocks corresponding to the first information in the first feedback multiplexing information.
The communications apparatus of claim 31, wherein the SCI includes second information indicating a cumulative number of sidelink transmissions scheduled since a first time unit; the first time unit is a time unit for the first terminal device to send the SCI corresponding to the second information.
The communications apparatus as claimed in claims 31-33, wherein the SCI comprises a third information indicating a total number of scheduled sidelink transmissions by a second time unit; and the second time unit is a time unit for the first terminal device to send the SCI corresponding to the third information.
A communications apparatus, comprising:

a transceiving unit, configured to send downlink control information DCI to a first terminal device; the DCI is used for scheduling at least two data blocks on a sidelink; the data block is a transmission block or a group of code blocks;

the transceiver unit is further configured to receive, from the first terminal device, second feedback multiplexing information, where the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks and feedback information for a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information for each of the at least two data blocks.
The apparatus of claim 35, wherein the DCI comprises fourth information indicating a position of feedback information of a DCI scheduled data block corresponding to the fourth information in the second feedback multiplexing information.
The apparatus of claim 35, wherein the DCI comprises fifth information indicating a cumulative number of scheduled transmissions by a third time unit; the third time unit is a time unit for the first terminal device to receive the DCI corresponding to the fifth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
The apparatus of any of claims 35-37, wherein the DCI comprises sixth information indicating a total number of scheduled transmissions by a fourth time unit; the fourth time unit is a time unit for the first terminal device to receive the DCI corresponding to the sixth information; the transmission comprises downlink transmission and side-line transmission, or the transmission is side-line transmission.
A communications apparatus comprising at least one processor and a memory, the at least one processor coupled with the memory;

the memory for storing a computer program;

the at least one processor configured to execute a computer program stored in the memory to cause the apparatus to perform the method of any of claims 1-10.
A communications apparatus comprising at least one processor and a memory, the at least one processor coupled with the memory;

the memory for storing a computer program;

the at least one processor configured to execute a computer program stored in the memory to cause the apparatus to perform the method of any of claims 11-15.
A communications apparatus comprising at least one processor and a memory, the at least one processor coupled with the memory;

the memory for storing a computer program;

the at least one processor configured to execute a computer program stored in the memory to cause the apparatus to perform the method of any of claims 16-19.
A computer-readable storage medium, characterized in that it stores a computer program or instructions which, when executed, implement the method of any one of claims 1 to 10.
A computer-readable storage medium, characterized in that it stores a computer program or instructions which, when executed, implement the method of any one of claims 11 to 15.
A computer-readable storage medium, characterized in that it stores a computer program or instructions which, when executed, implement the method of any one of claims 16 to 19.
A communication system, comprising: the system comprises a first terminal device, a second terminal device and a network device;

the first terminal device is configured to send at least two data blocks to the second terminal device; the data block is a transmission block or a group of code blocks; receiving first feedback multiplexing information from the second terminal device, where the first feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks and feedback information of a downlink data block on a sidelink SL, or the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks;

the second terminal device is configured to receive the at least two data blocks from the first terminal device; sending the first feedback multiplexing information to the first terminal equipment;

the first terminal device is further configured to send second feedback multiplexing information to a network device, where the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks and feedback information of a downlink data block, or the second feedback multiplexing information is multiplexing information of feedback information of each of the at least two data blocks;

the network device is configured to receive the second feedback multiplexing information.