CN112586031A

CN112586031A - Wireless communication method and terminal

Info

Publication number: CN112586031A
Application number: CN201980054523.5A
Authority: CN
Inventors: 赵振山; 卢前溪; 林晖闵
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2021-03-30
Also published as: WO2020143062A1

Abstract

The embodiment of the application provides a wireless communication method and a terminal, which can avoid resource waste. The method comprises the following steps: a first terminal receives a first transmission block TB sent by a second terminal by adopting a first sidelink; and the first terminal adopts a second downlink link to send feedback information aiming at the first TB to the second terminal, wherein the feedback information is based on the Coding Block Group (CBG).

Description

Wireless communication method and terminal

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a wireless communication method and a terminal.

Background

The car networking system is a Sidelink (SL) transmission technology based on a terminal to Device (D2D) transmission mode, and is different from a mode that communication data in a traditional Long Term Evolution (LTE) system is received or sent through a base station, and the car networking system adopts a terminal to terminal direct communication mode, so that the car networking system has higher spectral efficiency and lower transmission delay.

In order to improve transmission reliability, a feedback Channel is introduced to the SL, that is, a receiving terminal sends feedback information to a sending terminal according to a detected Physical Sidelink Control Channel (PSCCH) and a detected Physical Sidelink Shared Channel (PSCCH), and the sending terminal determines whether data needs to be retransmitted to the terminal according to the received feedback information.

Currently, feedback information can be sent in a Transport Block (TB) -based manner, and if part of data in the TB is correctly received and the rest of data is not correctly received, a receiving terminal will send a Negative Acknowledgement (NACK) to a sending terminal, and the sending terminal needs to retransmit the TB, which results in resource waste.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and a terminal, which can avoid resource waste.

In a first aspect, a wireless communication method is provided, including: a first terminal receives a first transmission block TB sent by a second terminal by adopting a first sidelink; and the first terminal adopts a second downlink link to send feedback information aiming at the first TB to the second terminal, wherein the feedback information is based on the Coding Block Group (CBG).

In a second aspect, a wireless communication method is provided, including: the second terminal adopts a first sidelink to send a first transmission block TB to the first terminal; and the second terminal receives feedback information aiming at the first TB, which is sent by the first terminal by adopting a second sidelink, wherein the feedback information is based on the Coding Block Group (CBG).

In a third aspect, a terminal is provided for performing the method in the first or second aspect.

In particular, the terminal comprises functional modules for performing the method in the first or second aspect described above.

In a fourth aspect, a terminal is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect or the second aspect.

In a fifth aspect, a chip is provided for implementing the method of the first or second aspect.

Specifically, the chip includes: a processor for calling and running the computer program from the memory so that the device on which the chip is installed performs the method of the first or second aspect.

A sixth aspect provides a computer readable storage medium for storing a computer program for causing a computer to perform the method of the first or second aspect.

In a seventh aspect, a computer program product is provided, comprising computer program instructions for causing a computer to perform the method of the first or second aspect.

In an eighth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first or second aspect described above.

One TB can be divided into at least one CBG, a receiving terminal (namely, a first terminal) can respectively send feedback information according to the receiving state of each CBG, a sending terminal (namely, a second terminal) can retransmit the CBG which is not correctly received by the receiving terminal according to the feedback information of each CBG, and the correctly received CBG does not need to be retransmitted, so that the retransmission resource overhead can be reduced, and the transmission efficiency of the system is improved.

Drawings

Fig. 1 is a schematic diagram of a communication mode of V2X according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of PSCCH resource pools and PSCCH resource pools according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a communication mode of V2X according to an embodiment of the present disclosure.

Fig. 4 is a schematic diagram of a wireless communication method provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of a wireless communication method provided in an embodiment of the present application.

Fig. 6 is a schematic diagram of CBG feedback and retransmission according to an embodiment of the present disclosure.

Fig. 7 is a schematic diagram illustrating a correspondence relationship between a feedback resource and a CBG and an SCI indicating the feedback resource according to an embodiment of the present disclosure.

Fig. 8 is a schematic diagram of a communication method of V2X according to an embodiment of the present application.

Fig. 9 is a schematic diagram of a positional relationship between a resource location occupied by data and a feedback resource location provided by an embodiment of the present application.

Fig. 10 is a schematic diagram of a positional relationship between a resource location occupied by data and a feedback resource location provided by an embodiment of the present application.

Fig. 11 is a schematic diagram of a terminal provided in an embodiment of the present application.

Fig. 12 is a schematic diagram of another terminal provided in an embodiment of the present application.

Fig. 13 is a schematic diagram of a terminal provided in an embodiment of the present application.

Fig. 14 is a schematic diagram of a chip provided in an embodiment of the present application.

Fig. 15 is a schematic diagram of a communication system provided in an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

The network device mentioned in the embodiments of the present application may be a device that communicates with a terminal device (or referred to as a communication terminal, a terminal). A network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, a gNB in a new wireless system, a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The terminal devices mentioned in the embodiments of the present application include, but are not limited to, connections via wire lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), Digital cables, and direct cable connections; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, 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 PLMN, etc.

In 3rd Generation Partnership Project (3 GPP) release 14(Rel-14), two transmission modes are defined for Vehicle networking technology (V2X), mode 3 and mode 4 as shown in fig. 1.

Mode 3: the transmission resource of the vehicle-mounted terminal is allocated by the base station, and the vehicle-mounted terminal transmits data on the side uplink according to the resource allocated by the base station; the base station may allocate resources for single transmission to the terminal through a Downlink (DL), or may allocate resources for semi-static transmission to the terminal.

Mode 4: the vehicle-mounted terminal adopts a transmission mode of interception (sending) + reservation (reservation). The vehicle-mounted terminal acquires an available transmission resource set in a resource pool in an intercepting mode, and the terminal randomly selects one resource from the set to transmit data. Because the service in the internet of vehicles system has periodic characteristics, the terminal usually adopts a semi-static transmission mode, that is, after the terminal selects one transmission resource, the resource can be continuously used in a plurality of transmission periods, thereby reducing the probability of resource reselection and resource conflict. The terminal can carry the information of the reserved secondary transmission resource in the control information transmitted this time, so that other terminals can judge whether the resource is reserved and used by the user by detecting the control information of the user, and the purpose of reducing resource conflict is achieved.

In the LTE car networking system, data transmitted by the sideline link may adopt a Sideline Control Information (SCI) + data transmission mode, where the sideline Control Information carries Information required for demodulating data, such as Modulation and Coding Scheme (MCS), time-frequency resource allocation Information, priority Information, and the like, and a receiving end terminal obtains a time-frequency resource position of the data by detecting the sideline Control Information and detects the data on a corresponding time-frequency resource. The side-line control information can be loaded on a PSCCH, data can be loaded on the PSSCH, a resource pool of the PSCCH and a resource pool of the PSSCH are configured through pre-configuration or a network, a sending terminal sends the PSCCH and the PSSCH respectively in the corresponding resource pools, a receiving terminal firstly detects the PSCCH in the resource pool of the PSCCH in a blind mode, and detects the PSSCH corresponding to the SCI on the corresponding time-frequency resource in the PSSCH resource pool according to indication information in the SCI carried by the PSCCH. The PSCCH resource pool and the PSCCH resource pool may be as shown in fig. 2.

In NR-V2X, autonomous driving can be supported, thus placing higher demands on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, greater coverage, more flexible resource allocation, etc.

In the NR-V2X system, multiple transmission modes, mode 1 and mode 2, may be introduced, where mode 1 may be that the network allocates transmission resources for the terminal (similar to mode 3 in LTE-V2X), and mode 2 may be that the terminal selects transmission resources, and in mode 2, the following sub-modes are further divided.

Sub-mode 1: the terminal autonomously selects a transmission resource (similar to mode 4 in LTE-V2X); for example, the first terminal autonomously selects the resource in a pre-configured or network-configured resource pool (the resource may be selected randomly or by interception)

Sub-mode 2: the terminal assists other terminals to select resources; for example, one of the terminals sends assistance information to the other terminal, which may include (but is not limited to): available time-frequency resource Information, available transmission resource set Information, Channel measurement Information and Channel Quality Information (such as Channel State Information (CSI), Channel Quality Information (CQI), Precoding Matrix Index (PMI), Rank Indicator (RI), Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Received Signal Strength Indication (RSSI), path loss Information, etc.).

Sub-mode 3: the terminal selects resources from the transmission resources configured for the terminal; for example, the network configures transmission resources for each terminal, and when the terminal has sidestream data transmission, the data transmission is performed by using the transmission resources configured by the network.

Sub-mode 4: the terminal allocates transmission resources for other terminals; for example, one of the terminals is a group head of the group communication, the other terminals are group members of the group, and the one terminal directly allocates time-frequency resources for sidelink transmission to the other terminals.

For example, as shown in fig. 3, UE1, UE2, and UE3 form a communication group, UE1 is a group head of the group and has functions of resource management, allocation, control, and the like, UE2/UE3 are group members, UE1 may allocate sidelink transmission resources to UE2/UE3, and UE2 and UE3 perform sidelink transmission on the resources allocated by UE 1.

It should be understood that the above mentioned sub-modes are only illustrative, and other transmission modes are possible in the actual network, and are not limited to these sub-modes, or only some of the transmission modes are supported in the actual network.

In NR-V2X, in order to improve transmission reliability, that is, a receiving terminal transmits feedback information to a transmitting terminal according to a detected PSCCH or PSCCH, and the transmitting terminal determines whether data needs to be retransmitted to the terminal according to the received feedback information.

The embodiment of the application provides the following mode, and resource waste can be avoided on the basis of not reducing transmission reliability.

The feedback information in the embodiment of the present application may be NACK (which may also be referred to as Hybrid Automatic Repeat reQuest (HARQ) -NACK) or Acknowledgement (ACK) (which may also be referred to as HARQ-ACK). The method may also be applied to transmission of other feedback information, such as CSI or feedback for beams.

The method can be used in the V2X scene and can also be used in other D2D scenes.

Fig. 4 is a schematic flow chart diagram of a wireless communication method 100 according to an embodiment of the present application. The method 100 may be performed by a first terminal. The method 100 may include at least some of the following.

At 110, the first terminal receives a first TB sent by the second terminal by using a first sidelink;

in 120, the first terminal sends, to the second terminal, feedback information for the first TB by using a second sidelink, where the feedback information is feedback information based on a Coding Block Group (CBG).

Fig. 5 is a schematic flow chart diagram of a wireless communication method 200 according to an embodiment of the present application. The method 200 may be performed by a second terminal. The method 200 may include at least some of the following.

At 210, the second terminal transmits a first TB to the first terminal using the first sidelink.

In 220, the second terminal receives feedback information for the first TB, which is sent by the first terminal using a second sidelink, where the feedback information is CBG-based feedback information.

Specifically, one TB may be divided into at least one CBG, the receiving terminal (i.e., the first terminal) may respectively send feedback information according to the receiving state of each CBG, the sending terminal (i.e., the second terminal) may retransmit the CBG that is not correctly received by the receiving terminal according to the feedback information of each CBG, and the correctly received CBG may not be retransmitted, so that the resource overhead of retransmission may be reduced, and the transmission efficiency of the system may be improved.

For example, as shown in fig. 6, one TB may be divided into 4 CBGs, that is, CBG1, CBG2, CBG3, and CBG4, and the receiving end terminal may send feedback information according to the receiving state of each CBG, respectively, for example, the feedback information of CBG4 and CBG2 in fig. 6 is NACK, and the feedback information of CBG1 and CBG3 is ACK, and then the transmitting end terminal may determine that CBG4 and CBG2 need to be retransmitted according to the feedback information sent by the receiving end terminal, and then retransmit CBG2 and CBG 4.

Optionally, in this embodiment of the present application, the feedback information based on the CBG may be carried through the PSSCH, and at this time, the feedback information of each CBG of the TB may be carried in the PSSCH.

Or, the first terminal may carry the CBG-based feedback information through the PSCCH, and when the first terminal has data to transmit, the feedback information may be carried in the SCI corresponding to the data, and at this time, the SCI may carry information required for demodulating the data in addition to the CBG-based feedback information, and when the first terminal has no data to transmit, only the feedback information may be carried on the PSCCH.

Alternatively, the first terminal may carry the CBG-based Feedback information through a Physical Sidelink Feedback Channel (PSFCH), and at this time, the Feedback information of each CBG of the TB may be carried in the PSFCH.

Optionally, in this embodiment of the present application, the feedback information may also be carried by a sequence.

In one implementation, the feedback information is carried over a first sequence.

Specifically, the first terminal may carry feedback information of each CBG included in the TB through one first sequence. The second terminal may determine feedback information for each CBG included in the TB based on the one first sequence.

For example, since one TB includes a plurality of CBGs, there may be both ACK and NACK cases for the feedback information of each CBG, if the TB includes N number of CBGs, there may be N power of 2 number of reception cases for the TB. And the one first sequence may characterize one of the 2 nd power reception cases.

Optionally, in this embodiment of the application, the first terminal may select the first sequence from a sequence set according to a reception condition of a CBG included in the first TB. Different sequences in the set of sequences may correspond to different reception cases of CBGs comprised by a single TB.

Specifically, as described above, since there may be N times of 2 receptions for a TB including N CBGs, there may be a sequence set, and the sequence set may include N times of 2 sequences, which respectively reflect various receptions for the TB, the first terminal may select a sequence from the sequence set according to the reception of the first TB, for characterizing the reception of the first TB. And for the second terminal, determining the receiving condition of the first TB according to the received one first sequence.

The first terminal and the second terminal may respectively store a correspondence between each sequence in the sequence set and a reception condition of the TB. The first terminal may select the first sequence from the set of sequences according to the correspondence and the reception condition of the first TB, and the second terminal may determine the reception condition of the first TB according to the correspondence and the received first sequence.

Optionally, in this embodiment, the different sequences correspond to different combinations of ACK and NACK of CBGs included in a single TB.

That is, the sequence set may include a combination of ACK and NACK of each CBG and ACK and NACK of other CBGs.

As described above, one TB includes a plurality of CBGs, and there may be both ACK and NACK in the feedback information of each CBG, and if the TB includes N CBGs, there may be N power of 2 reception cases for the TB. At this time, the number of sequences included in the sequence set may be N times of 2, and the number of information bits included in the sequences may be equal to N, that is, may be equal to the number of CBGs included in the TB. Alternatively, it can also be said that log₂T represents the number of information bits included in the sequence, or represents the number of CBGs included in the TB, where T is the number of sequences included in the sequence set.

For example, if a TB can be divided into 4 CBGs at most, a sequence set can be configured, where the set includes 2 to the fourth power and 16 sequences in total, and corresponds to 16 reception situations, respectively, and the first terminal selects a corresponding sequence from the sequence set for feedback transmission according to HARQ-ACK/NACK status information of 4 CBGs to be fed back.

For example, one sequence set is predefined to include 4 sequences, one TB includes 2 CBGs, each CBG corresponds to a different HARQ ACK or HARQ NACK, respectively, and the correspondence between the sequence index and the feedback information is shown in table 1 below.

TABLE 1

Sequence indexing	Feedback information (CBG0, CBG1)
0 0	(ACK，ACK)
0 1	(ACK，NACK)

1 0	(NACK，ACK)
1 1	(NACK，NACK)

It is mentioned above that the sequence set may comprise sequences that are a combination of ACK and NACK for each CBG and ACK and NACK for other CBGs. However, the embodiments of the present application are not limited thereto, and may have other implementations.

In one implementation, different sequences in the set of sequences correspond to different NACK cases for CBGs comprised by a single TB.

That is, in this case, if all CBGs are correctly received, the feedback sequence may not be transmitted, in comparison with the case where the above-mentioned sequence set includes sequences that are combinations of ACKs and NACKs of respective CBGs and ACKs and NACKs of other CBGs, at which time, if the TB includes the number of CBGs N, the number of sequences included in the sequence set is N-th power of 2 minus one.

Taking the example that the TB includes 2 CBGs, a sequence set may be configured, where the sequence set may include 3 sequences, one sequence is used to indicate that only the feedback information of the CBG0 is NACK, one sequence is used to indicate that only the feedback information of the CBG1 is NACK, and one sequence is used to indicate that both the feedback information of the CBG0 and the CBG1 are NACK, and at this time, the correspondence between the sequence index and the feedback information may be as shown in table 2 below.

TABLE 2

Sequence indexing	Feedback information (CBG0, CBG1)
0 0	(NACK, ACK by default)
0 1	(defaulting to ACK, NACK)
1 0	(NACK，NACK)

In another implementation, the different sequences correspond to different positive acknowledgement ACK cases for CBGs comprised by a single TB.

That is, in this case, if all CBGs are not correctly received, the feedback sequence may not be transmitted, in comparison with the above-mentioned case where the sequence set includes sequences that are combinations of ACKs and NACKs of respective CBGs and ACKs and NACKs of other CBGs, at which time, if the TB includes the number of CBGs N, the number of sequences included in the sequence set is N-th power of 2 minus one.

Taking the example that the TB includes 2 CBGs, a sequence set may be configured, where the sequence set may include 3 sequences, one sequence is used to indicate that only the feedback information of the CBG0 is ACK, one sequence is used to indicate that only the feedback information of the CBG1 is ACK, and one sequence indicates that both the feedback information of the CBG0 and the CBG1 are ACK, and at this time, the correspondence between the sequence index and the feedback information may be as shown in table 3 below.

TABLE 3

Sequence indexing	Feedback information (CBG0, CBG1)
0 0	(ACK, NACK as default)
0 1	(NACK, ACK by default)
1 0	(ACK，ACK)

Optionally, in this embodiment of the application, the sequence set may be preset, configured on a network side, or configured by another terminal, where the another terminal may be a group head of a terminal group to which the first terminal belongs.

Optionally, in this embodiment of the present application, a correspondence between each sequence in the sequence set and a reception condition of the TB may be preset, configured on a network side, or configured by another terminal, where the another terminal may be a group head of a terminal group to which the first terminal belongs.

Optionally, in this embodiment of the present application, the feedback information includes feedback information of at least part of CBGs of the first TB, where different CBGs in the first TB correspond to different feedback resources.

Specifically, feedback information of different CBGs included in the TB may be fed back through different feedback resources, and the second terminal may determine the feedback information of the CBG corresponding to the feedback resource according to the received feedback information on the different feedback resources.

For example, as shown in fig. 7, one TB may include four CBGs, that is, CBG1, CBG2, CBG3, and CBG4, feedback resources corresponding to the four CBGs may be feedback resource 1, feedback resource 2, feedback resource 3, and feedback resource 4, and if the first terminal sends feedback information on feedback resource 1, it may be known that the feedback information corresponds to CBG1 at this time.

In this case, since feedback information of different CBGs may be carried by different feedback resources, a sequence for indicating NACK corresponding to each CBG may be the same, and a sequence for indicating ACK corresponding to each CBG may be the same. At this time, the number of sequences for indicating feedback information may be small, for example, sequence 0 represents ACK and sequence 1 represents NACK.

That is, 2 sequences may be defined to correspond to HARQ-ACK and HARQ-NACK, respectively, and if feedback of HARQ-ACK/NACK for multiple bits of a CBG is to be supported, feedback information of different CBGs may be carried by different feedback resources.

Optionally, in this embodiment of the present application, the feedback information is carried through a second sequence; and the second sequence indicates NACK information and not ACK information, or the second sequence indicates ACK information and not NACK information. In this case, the second sequences corresponding to different CBGs are identical.

That is, when the first terminal performs feedback, it only needs to send the feedback sequence on the feedback resource corresponding to the CBG whose feedback information is NACK. If the second terminal detects a feedback sequence on a certain feedback resource, the CBG corresponding to the feedback resource is considered to be incorrectly received and needs to be retransmitted, and if the feedback sequence is not detected on a certain feedback resource, the CBG corresponding to the feedback resource is considered to be correctly received and does not need to be retransmitted.

In this case, for the same CBG of the first TB, the feedback resource used by the first terminal may be the same as the feedback resource used by other terminals in the terminal group to which the first terminal belongs.

For example, as shown in fig. 8, in multicast communication, when a group head terminal transmits data, all other group member terminals in the group need to transmit feedback information. If each terminal needs a separate feedback resource, the overhead of the feedback resource may be large. In order to reduce the overhead of feedback resources, one way is that all group members send feedback information on the same feedback resources, and only the terminal that needs to feed back HARQ-NACK sends feedback information on the resources, and the terminal that receives the right does not need to send feedback information. If the group head detects HARQ-NACK on the resource, it can be determined that there are group members in the group that do not correctly receive the data, i.e. retransmit the data; if the group head does not detect a HARQ-NACK on the resource, i.e. by default all group members receive the data correctly, the data is not retransmitted.

In the scenario shown in fig. 8, multiple feedback resources may still be adopted, and different feedback resources correspond to different CBGs, so as to support CBG-based feedback.

Or, the first terminal feeds back information, and only needs to send a feedback sequence on a feedback resource corresponding to the CBG whose feedback information is ACK, and if the second terminal detects a feedback sequence on a certain feedback resource, it considers that the CBG corresponding to the feedback resource is correctly received without retransmission, and if no feedback sequence is detected on a certain feedback resource, it considers that the CBG corresponding to the feedback resource is incorrectly received and needs retransmission.

Optionally, in this embodiment of the present application, the feedback information is carried by PSFCHs, each PSFCH carries feedback information of one CBG, and feedback information of different CBGs is carried by PSFCHs of different feedback resources. At this time, only 1-bit feedback information is carried on the PSFCH, corresponding to ACK or NACK.

For example, as shown in fig. 7, one TB may include four CBGs, that is, CBG1, CBG2, CBG3, and CBG4, where feedback resources corresponding to the four CBGs may be feedback resource 1, feedback resource 2, feedback resource 3, and feedback resource 4, and if the first terminal sends a PSFCH on feedback resource 1, it may be known that feedback information carried by the PSFCH corresponds to feedback information of CBG1 at this time.

In this case, since the feedback information of different CBGs can be carried by different feedback resources, the PSFCH sent on each feedback resource only needs to carry the feedback information of one CBG, for example, the feedback information is ACK or NACK, and the feedback information only needs 1 bit.

Optionally, in this embodiment, the different feedback resources (corresponding to different CBGs) mentioned above may be different in at least one of the following dimensional resources: time domain resources, code domain resources, frequency domain resources, and space domain resources.

Various implementations of how to determine the feedback resources corresponding to the individual CBGs will be described below.

In one implementation, the first terminal receives first indication information; and determining feedback resources corresponding to each CBG in the at least part of CBGs based on the first indication information, so as to be used for sending the feedback information corresponding to each CBG.

The first indication information may be from the second terminal (i.e., the sending terminal), or from another terminal (e.g., a group header of a terminal group to which the first terminal belongs), or from a network side.

For example, if the first indication information is from the group header of the second terminal or the terminal group to which the first terminal belongs, it may be indicated by SCI carried in PSCCH or by data in PSCCH.

For example, if the first indication Information is from the network side, the first indication Information may be indicated by a broadcast message, a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

The first indication information may optionally carry information of feedback resources of individual CBGs of a single TB.

For example, as shown in fig. 8, one TB is divided into 4 CBGs, SCIs carry resource indication information, respectively indicate 4 time-frequency resources, which correspond to the 4 CBGs, and HARQ-ACK or HARQ-NACK information corresponding to the CBGs is fed back through a sequence on each time-frequency resource.

Or, the first indication information indicates a feedback resource set, where the feedback resource set is used for the first terminal to select a feedback resource corresponding to each CBG in at least part of CBGs. The set of feedback resources may include resources in at least one of the following dimensions: time domain resources, frequency domain resources, code domain resources, and space domain resources. If only a partial dimension of a resource is indicated, the resources used by other dimensions may be the same for different CBGs.

At this time, the first terminal may determine, according to the first criterion, a feedback resource corresponding to each CBG from the feedback resource set.

For example, a time domain symbol, 4 Physical Resource Blocks (PRBs) need to be occupied for transmitting a feedback sequence, the second terminal sends a TB, where the TB includes 4 CBGs, and then the second terminal can indicate a time domain symbol through the SCI and indicate 16 PRBs on the time domain symbol, and the first terminal selects a corresponding Resource from the 16 PRBs as a feedback Resource of each CBG according to the index information of the CBG. For example, in the order of PRB indices from low to high, the first 4 PRBs are used to transmit feedback information of a first CBG, the last 4 PRBs are used to transmit feedback information of a second CBG, and so on.

In the above example, the frequency domain resources are continuous, and the embodiment of the present application is not limited to this, for example, the resource set may include a plurality of discrete resources, each discrete resource may have an index, and the first terminal may select according to the index of the resource and the index information of the CBG, for example, according to an order from low to high of the indexes, a first resource is used for feedback of a first CBG, a second resource is used for feedback of a second CBG, and so on.

Or the first indication information carries information of the feedback resources of the partial CBG of the single TB, and is used to determine the feedback resources of the partial CBG and/or the feedback resources of other partial CBGs based on the information of the feedback resources of the partial CBG.

Specifically, the first indication information may carry information of the feedback resource of one CBG, and the feedback resources of the other CBGs may be determined based on the second criterion and the feedback resource of the one CBG. The second criterion may be preset, configured on the network side, or configured in the group head of the terminal group to which the first terminal belongs.

For example, 4 transmission resources from the feedback resource of the one CBG may be used as the feedback transmission resources corresponding to the 4 CBGs.

Optionally, in this embodiment of the application, the first terminal may determine, based on a resource occupied by the first sidelink and/or a third sidelink, a feedback resource corresponding to each CBG in the at least part of CBGs, so as to be used for sending the feedback information corresponding to each CBG, where the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.

Specifically, the feedback resource corresponding to each CBG in the at least part of CBGs may be determined based on the resource occupied by the first sidelink and/or the third sidelink and the corresponding relationship between the resource occupied by the sidelink and the feedback resource. Wherein the correspondence relationship is optionally preset, configured on a network side, or configured at a group head of a terminal group to which the first terminal belongs

The feedback resource of the CBG may be determined according to the time domain resource and/or the frequency domain resource occupied by the first side link and/or the third side link.

In one implementation, the time domain location of the feedback resource is based on the time domain location of one of the first sidelink and the third sidelink, and the frequency domain location of the feedback resource is based on the frequency domain location of the other of the first sidelink and the third sidelink.

In one implementation, the time domain location and the frequency domain location of the feedback resource are both based on the first sidelink. Alternatively, the time domain location of the feedback resource is based on the first sidelink, and the frequency domain location is preset or network configured or other terminal configured, or vice versa.

In one implementation, the time domain location and the frequency domain location of the feedback resource are both based on the third sidelink. Alternatively, the time domain location of the feedback resource is based on the third sidelink, and the frequency domain location is preset or network configured or other terminal configured, or vice versa.

The time domain position mentioned above may be a time slot level or a symbol level, and if the time domain position of the time slot level is determined based on the first sidelink and/or the third sidelink, which symbol to sample specifically may be preset or network configured or configured by other terminals.

For example, when data is transmitted in slot n, feedback information is transmitted in slot n +1, and the feedback information is transmitted on the last time domain symbol of slot n +1, where the frequency domain starting position of the feedback information is the same as the frequency domain starting position of the data (or PSCCH corresponding to the data), and the frequency domain resource size of the feedback information may be a predefined size or the same as the frequency domain size of the psch (or PSCC). The feedback resource may thus be determined from the transmission resource of the psch (or PSCCH).

For example, as shown in fig. 9, the feedback resource and the psch have the same frequency domain starting position and the same frequency domain size, and the psch is transmitted in slot n and the feedback information is transmitted in the last time domain symbol of slot n + 1.

Optionally, when determining the feedback resource based on the resource position of the first sidelink and/or the third sidelink, the adopted corresponding relationship may be a corresponding relationship between the resource position of the sidelink and the feedback resource position of each CBG.

For example, the correspondence has indicated how the feedback resources of CBG0, CBG1, CBG2, etc. correspond to the resource locations of the sidelink.

Alternatively, the correspondence relationship may be a correspondence relationship between the sidelink and a feedback resource of a CBG. At this time, after the feedback resource of one CBG is determined, the feedback resources of the other CBGs may be determined according to a certain criterion.

For example, a first feedback resource (feedback for CBGs) may be determined according to a resource location of the first side link and/or the third side link, and the criterion may be that N consecutive feedback resources starting from the first feedback resource are feedback resources for N CBGs.

As shown in fig. 10, according to the resource location of the first sidelink, the transmission resource of the feedback channel corresponding to the first CBG, that is, the transmission resource of feedback 1 in fig. 10, may be determined, according to the corresponding criterion, 4 consecutive transmission resources with the same size starting from the transmission resource of feedback 1 may be determined as 4 feedback resources, which respectively correspond to 4 CBGs of data.

It is introduced above that the feedback resource of the CBG can be determined based on the first indication information, and the feedback resource of the CBG can be determined based on the resource location of the first sidelink and/or the third sidelink, respectively. In this embodiment of the present application, the feedback resource of the CBG may also be determined based on the first indication information and/or the resource location of the first side link and/or the third side link.

For example, a time domain resource of the feedback resource may be determined based on the first indication information, and a frequency domain resource starting position of the feedback resource may be determined based on the frequency domain resource starting position of the first side link and/or the third side link.

For example, a time domain resource of the feedback resource may be determined based on the first indication information, and a frequency domain resource length of the feedback resource may be determined based on the frequency domain resource length of the first side link and/or the third side link.

For example, a frequency domain resource of the feedback resource may be determined based on the first indication information, and a time slot of the feedback resource may be determined based on the time slot of the first side link and/or the third side link.

For example, a resource location of a symbol level of the feedback resource may be determined based on the first indication information, and a resource location of a slot level of the feedback resource may be determined based on a resource location of the first side link and/or the third side link.

It has been explained above that the first terminal may perform the CBG-based feedback, and whether the first terminal performs the CBG-based feedback may be preset or may be indicated by the indication information.

Specifically, the first terminal may receive second indication information indicating CBG-based feedback for the first TB. The second indication information may be sent by the second terminal, may be configured by the network side, or may be configured by the group head of the terminal group to which the first terminal belongs.

Here, the second indication information may be transmitted in real time, that is, whether CBG-based feedback is performed is indicated for each TB, respectively. Alternatively, the second indication information may be sent as a semi-static message, and in this case, the second indication information indicates whether to perform CBG-based feedback on the TB before the second indication information is received again, based on the currently received indication of the second indication information.

Optionally, the second indication information may be carried in PSCCH or pscsch. Where the PSCCH or PSCCH may be transmitted by the second terminal or may be transmitted by the group head of the terminal group to which the first terminal belongs.

Specifically, the second indication information is carried in the PSCCH, and the second indication information is carried by an information field in an SCI and/or a scrambling sequence of the SCI in the PSCCH. The SCI may be an SCI corresponding to a first TB for the first terminal to demodulate the first TB, or may also be SCIs corresponding to other TBs.

For example, a first information field is included in the SCI, with 0 indicating TB-based feedback and 1 indicating CBG-based feedback.

For example, scrambling the SCI with a first scrambling sequence represents TB-based feedback, and scrambling the SCI with a second scrambling sequence represents CBG-based feedback.

Or, the second indication information is carried in the PSSCH, and the second indication information is carried through data in the PSSCH. Here, the data mentioned here may be the first TB described above, or may be other TBs.

Or, the second indication information is carried in broadcast information, radio resource control RRC signaling, or downlink control information DCI sent by the network.

It is described above that one TB may include a plurality of CBGs at most, however, whether data of each CBG is included in currently transmitted data may be notified to the first terminal by means of indication information.

Specifically, the first terminal receives third indication information, where the third indication information indicates a sending situation of a CBG in the first TB. The sending case may indicate which CBGs are sent, or may indicate only the number of CBGs sent.

And the third indication information is carried in the PSCCH, and the third indication information is carried through an information domain of SCI in the PSCCH.

For example, a first information field is included in the SCI, which is used to indicate information of the CBG. For example, the first information field is a bitmap, one bit corresponds to one CBG, and the length of the bitmap corresponds to the number of maximum CBGs included in one TB. For example, if one TB can be divided into 4 CBGs at most, a bitmap with a length of 4 bits is included in the SCI, and the value of the bitmap is 1111 in the first transmission of data, and bits from right to left correspond to CBG0, CBG1, CBG2 and CBG3, respectively, if CBG1 and CBG3 receive an error, the terminal only needs to retransmit the data corresponding to CBG1 and CBG3 at the time of retransmission, and the bitmap in the SCI is set to 1010.

Of course, the third indication information may also be carried in the PSSCH, or in a message sent by the network side.

In the embodiment of the present application, the feedback information is taken as ACK or NACK for example, and the embodiment of the present application may also be used in other scenarios, for example, feedback of channel state information or feedback for a beam. The first TB may be replaced with at least one channel or cell, etc., or at least one transmission beam at this time.

Fig. 11 is a schematic block diagram of a terminal 300 according to an embodiment of the present application. The terminal 300 includes a communication unit 310.

The communication unit 310 is configured to: receiving a first transmission block TB sent by a second terminal by adopting a first sidelink; and sending feedback information aiming at the first TB to the second terminal by adopting a second side link, wherein the feedback information is feedback information based on a Coding Block Group (CBG).

Optionally, in this embodiment of the present application, one first sequence carries feedback information of each CBG of the first TB.

Optionally, in this embodiment of the present application, the terminal 300 further includes a processing unit 320, configured to:

selecting said one first sequence from a set of sequences depending on the reception of the CBG comprised by said first TB.

Optionally, in this embodiment of the present application, different sequences in the sequence set correspond to different reception cases of CBGs included in a single TB.

Optionally, in this embodiment of the present application, the different sequences correspond to different negative acknowledgement, NACK, cases of CBGs included by a single TB; or

Different sequences correspond to different positive acknowledgement ACK cases of CBGs comprised by a single TB; or the like, or, alternatively,

the different sequences correspond to different combinations of ACKs and NACKs for CBGs included by a single TB.

Optionally, in this embodiment of the present application, the sequence set is preset, configured on a network side, or configured by a terminal other than the terminal.

Optionally, in this embodiment of the present application, the communication unit 310 is further configured to: receiving first indication information;

the terminal further comprises a processing unit 320 for: and determining feedback resources corresponding to each CBG in the at least part of CBGs based on the first indication information, so as to be used for sending the feedback information corresponding to each CBG.

Optionally, in this embodiment of the application, the first indication information carries information of feedback resources of each CBG of a single TB.

Optionally, in this embodiment of the application, the first indication information indicates a feedback resource set, where the feedback resource set is used for the terminal to select a feedback resource corresponding to each CBG in the at least part of CBGs.

Optionally, in this embodiment of the application, the first indication information carries information of the feedback resources of the partial CBG of the single TB, and is used to determine the feedback resources of the partial CBG and/or the feedback resources of other partial CBGs based on the information of the feedback resources of the partial CBG.

Optionally, in this embodiment of the present application, the terminal further includes a processing unit 320, configured to:

and determining a feedback resource corresponding to each CBG in the at least part of CBGs based on the resource occupied by the first sidelink and/or a third sidelink, so as to be used for sending the feedback information corresponding to each CBG, wherein the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.

and determining the feedback resource corresponding to each CBG in the at least part of CBGs based on the resources occupied by the first side link and/or the third side link and the corresponding relationship between the resources occupied by the side links and the feedback resources.

Optionally, in this embodiment of the present application, the correspondence is preset, configured on a network side, or configured on another terminal except for the terminal.

Optionally, in this embodiment of the application, for the same CBG of the first TB, the feedback resource used by the terminal is the same as the feedback resource used by other terminals in the terminal group to which the terminal belongs.

Optionally, in this embodiment of the present application, the feedback information is carried through a second sequence; and is

The second sequence indicates NACK information without ACK information, or the second sequence indicates ACK information without NACK information.

Optionally, in this embodiment of the present application, the communication unit 310 is further configured to:

receiving second indication information indicating CBG-based feedback for the first TB.

Optionally, in this embodiment of the present application, the second indication information is carried in a physical sidelink control channel PSCCH, and the second indication information is carried by an information field in an SCI of the PSCCH and/or a scrambling sequence of the SCI; or the like, or, alternatively,

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH; or the like, or, alternatively,

the second indication information is carried in broadcast information, Radio Resource Control (RRC) signaling or Downlink Control Information (DCI) sent by a network.

and receiving third indication information, wherein the third indication information indicates the sending condition of the CBG in the first TB.

Optionally, in this embodiment of the present application, the third indication information is carried in a PSCCH, and the third indication information is carried by an information field of an SCI in the PSCCH.

The terminal 300 may implement the corresponding operations implemented by the first terminal in the above method embodiments, and for brevity, no further description is provided here.

Fig. 12 is a schematic block diagram of a terminal 400 according to an embodiment of the present application. The terminal 400 includes a communication unit 410.

The communication unit 410 is configured to: sending a first Transport Block (TB) to a first terminal by adopting a first sidelink; and receiving feedback information aiming at the first TB, which is sent by the first terminal by adopting a second sidelink, wherein the feedback information is based on the Coding Block Group (CBG).

Optionally, in this embodiment of the present application, the one first sequence belongs to a set of sequences.

Optionally, in this embodiment of the present application, the feedback information includes feedback information of at least part of CBGs of the first TB, and different CBGs in the first TB correspond to different feedback resources.

Optionally, in this embodiment of the present application, the communication unit 410 is further configured to:

sending first indication information to the first terminal;

the first indication information is used for the first terminal to determine a feedback resource corresponding to each CBG in the at least part of CBGs.

Optionally, in this embodiment of the application, the first indication information indicates a feedback resource set, where the feedback resource set is used for the first terminal to select a feedback resource corresponding to each CBG in the at least part of CBGs.

Optionally, in this embodiment of the application, the first indication information carries information of feedback resources of a partial CBG of a single TB, and is used by the first terminal to determine the feedback resources of the partial CBG and/or the feedback resources of other partial CBGs based on the information of the feedback resources of the partial CBG.

Optionally, in this embodiment of the present application, the terminal further includes a processing unit 420, configured to:

Optionally, in this embodiment of the present application, the processing unit 420 is further configured to:

and determining the reception condition of the CBG in the first TB of other terminals in the terminal group to which the first terminal belongs based on the feedback information sent by the first terminal.

sending second indication information to the first terminal, wherein the second indication information indicates that the first TB is subjected to feedback based on CBG.

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH.

and sending third indication information to the first terminal, wherein the third indication information indicates the sending condition of the CBG in the first TB.

The terminal 400 may implement the corresponding operations implemented by the second terminal in the above method embodiments, and for brevity, no further description is given here.

Fig. 13 is a schematic structural diagram of a terminal 500 according to an embodiment of the present application. The terminal 500 shown in fig. 13 comprises a processor 510, and the processor 510 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 13, the terminal 500 may further include a memory 520. From the memory 520, the processor 510 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 520 may be a separate device from the processor 510, or may be integrated into the processor 510.

Optionally, as shown in fig. 13, the terminal 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 530 may include a transmitter and a receiver, among others. The transceiver 530 may further include one or more antennas.

Optionally, the terminal 500 may specifically be a first terminal or a second terminal in the embodiment of the present application, and the terminal 500 may implement a corresponding process implemented by the first terminal or the second terminal in each method in the embodiment of the present application, and for brevity, details are not described here again.

Fig. 14 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 600 shown in fig. 14 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 14, the chip 600 may further include a memory 620. From the memory 620, the processor 610 may call and run a computer program to implement the method in the embodiment of the present application.

The memory 620 may be a separate device from the processor 610, or may be integrated into the processor 610.

Optionally, the chip 600 may further include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

Optionally, the chip 600 may further include an output interface 640. The processor 610 may control the output interface 640 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

Optionally, the chip may be applied to the first terminal or the second terminal in the embodiment of the present application, and the chip may implement a corresponding process implemented by the first terminal or the second terminal in each method in the embodiment of the present application, and for brevity, details are not described here again.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 15 is a schematic block diagram of a communication system 800 according to an embodiment of the present application. As shown in fig. 15, the communication system 800 includes a first terminal 810 and a second terminal 820.

The terminal device 810 may be configured to implement the corresponding function implemented by the terminal device in the foregoing method, and the network device 820 may be configured to implement the corresponding function implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, 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 or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall 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 of wireless communication, comprising:

a first terminal receives a first transmission block TB sent by a second terminal by adopting a first sidelink;

and the first terminal adopts a second downlink link to send feedback information aiming at the first TB to the second terminal, wherein the feedback information is based on the Coding Block Group (CBG).
The method of claim 1 wherein a first sequence carries feedback information for each CBG of the first TB.
The method of claim 2, further comprising:

and the first terminal selects the first sequence from the sequence set according to the receiving condition of the CBG included by the first TB.
The method of claim 3, wherein different sequences in the set of sequences correspond to different reception cases of CBGs included in a single TB.
The method of claim 4, characterized in that different sequences correspond to different negative acknowledgement, NACK, cases of CBGs comprised by a single TB; or

Different sequences correspond to different positive acknowledgement ACK cases of CBGs comprised by a single TB; or the like, or, alternatively,

the different sequences correspond to different combinations of ACKs and NACKs for CBGs included by a single TB.
The method according to any of claims 3 to 5, wherein the set of sequences is pre-set, configured on the network side, or configured by a terminal other than the first terminal.
The method of claim 1, wherein the feedback information comprises feedback information for at least a partial CBG of the first TB, wherein different CBGs in the first TB correspond to different feedback resources.
The method of claim 7, further comprising:

the first terminal receives first indication information;

and determining feedback resources corresponding to each CBG in the at least part of CBGs based on the first indication information, so as to be used for sending the feedback information corresponding to each CBG.
The method of claim 8, wherein the first indication information carries information of feedback resources of individual CBGs of a single TB.
The method according to claim 8 or 9, wherein the first indication information indicates a set of feedback resources for the first terminal to select the feedback resources corresponding to each CBG of the at least part of CBGs.
The method according to any of claims 8 to 10, wherein the first indication information carries information of feedback resources of a partial CBG of a single TB, for determining the feedback resources of the partial CBG and/or feedback resources of other partial CBGs based on the information of feedback resources of the partial CBG.
The method according to any one of claims 7 to 11, further comprising:

and determining a feedback resource corresponding to each CBG in the at least part of CBGs based on the resource occupied by the first sidelink and/or a third sidelink, so as to be used for sending the feedback information corresponding to each CBG, wherein the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.
The method of claim 12, wherein the determining the feedback resource corresponding to each CBG of the at least some CBGs based on the resource occupied by the first sidelink and/or the third sidelink comprises:

and determining the feedback resource corresponding to each CBG in the at least part of CBGs based on the resources occupied by the first side link and/or the third side link and the corresponding relationship between the resources occupied by the side links and the feedback resources.
The method of claim 13, wherein the correspondence is pre-set, configured on a network side, or configured by a terminal other than the first terminal.
The method according to any of claims 7 to 14, wherein the feedback resources employed by the first terminal are the same as the feedback resources employed by other terminals in the group to which the first terminal belongs for the same CBG of the first TB.
The method according to any of claims 7 to 15, wherein the feedback information is carried by a second sequence; and is

The second sequence indicates NACK information without ACK information, or the second sequence indicates ACK information without NACK information.
The method according to any one of claims 1 to 16, further comprising:

the first terminal receives second indication information indicating that CBG-based feedback is performed for the first TB.
The method of claim 17, wherein the second indication information is carried in a Physical Sidelink Control Channel (PSCCH), and wherein the second indication information is carried by an information field in a physical cell identity (SCI) in the PSCCH and/or a scrambling sequence of the SCI; or the like, or, alternatively,

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH; or the like, or, alternatively,

the second indication information is carried in broadcast information, Radio Resource Control (RRC) signaling or Downlink Control Information (DCI) sent by a network.
The method according to any one of claims 1 to 18, further comprising:

and the first terminal receives third indication information, wherein the third indication information indicates the sending condition of the CBG in the first TB.
The method of claim 19, wherein the third indication information is carried in a PSCCH, and wherein the third indication information is carried by an information field of a SCI in the PSCCH.
A method of wireless communication, comprising:

the second terminal adopts a first sidelink to send a first transmission block TB to the first terminal;

and the second terminal receives feedback information aiming at the first TB, which is sent by the first terminal by adopting a second sidelink, wherein the feedback information is based on the Coding Block Group (CBG).
The method of claim 21 wherein a first sequence carries feedback information for each CBG of the first TB.
The method of claim 22, wherein the one first sequence belongs to a set of sequences.
The method of claim 23, wherein different sequences in the set of sequences correspond to different reception cases of CBGs included in a single TB.
The method of claim 24 wherein different sequences correspond to different negative acknowledgement, NACK, cases for CBGs comprised by a single TB; or

Different sequences correspond to different positive acknowledgement ACK cases of CBGs comprised by a single TB; or the like, or, alternatively,

the different sequences correspond to different combinations of ACKs and NACKs for CBGs included by a single TB.
The method of claim 21, wherein the feedback information comprises feedback information for at least a partial CBG of the first TB, wherein different CBGs in the first TB correspond to different feedback resources.
The method of claim 26, further comprising:

the second terminal sends first indication information to the first terminal;

the first indication information is used for the first terminal to determine a feedback resource corresponding to each CBG in the at least part of CBGs.
The method of claim 27, wherein the first indication information carries information of feedback resources of individual CBGs of a single TB.
The method of claim 27 or 28, wherein the first indication information indicates a set of feedback resources for the first terminal to select the feedback resources corresponding to each CBG of the at least part of CBGs.
The method according to any of claims 27 to 29, wherein the first indication information carries information of feedback resources of a partial CBG of a single TB, for the first terminal to determine the feedback resources of the partial CBG and/or feedback resources of other partial CBGs based on the information of feedback resources of the partial CBG.
The method of any one of claims 26 to 30, further comprising:

and based on the resources occupied by the first sidelink and/or the third sidelink, the second terminal determines the feedback resource corresponding to each CBG in the at least part of CBGs, so as to be used for sending the feedback information corresponding to each CBG, wherein the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.
The method of claim 31, wherein the determining, by the second terminal, the feedback resource corresponding to each CBG of the at least some CBGs based on the resource occupied by the first sidelink and/or the third sidelink comprises:

and based on the resources occupied by the first side link and/or the third side link and the corresponding relationship between the resources occupied by the side links and the feedback resources, the second terminal determines the feedback resources corresponding to each CBG in the at least part of CBGs.
The method of claim 32, wherein the correspondence is pre-set, configured on a network side, or configured by a terminal other than the second terminal.
The method according to any of claims 26 to 33, wherein the feedback information is carried by a second sequence; and is

The second sequence indicates NACK information without ACK information, or the second sequence indicates ACK information without NACK information.
The method of any one of claims 21 to 34, further comprising:

and determining the reception condition of the CBG in the first TB of other terminals in the terminal group to which the first terminal belongs based on the feedback information sent by the first terminal.
The method of any one of claims 21 to 35, further comprising:

and the second terminal sends second indication information to the first terminal, wherein the second indication information indicates that the first TB carries out feedback based on CBG.
The method of claim 36, wherein the second indication information is carried in a Physical Sidelink Control Channel (PSCCH), and wherein the second indication information is carried by an information field in a physical cell identity (SCI) in the PSCCH and/or a scrambling sequence of the SCI; or the like, or, alternatively,

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH.
The method of any one of claims 21 to 37, further comprising:

and the second terminal sends third indication information to the first terminal, wherein the third indication information indicates the sending condition of the CBG in the first TB.
The method of claim 38, wherein the third indication information is carried in a PSCCH, and wherein the third indication information is carried by an information field of a SCI in the PSCCH.
A terminal, characterized in that it comprises a communication unit for:

receiving a first transmission block TB sent by a second terminal by adopting a first sidelink;

and sending feedback information aiming at the first TB to the second terminal by adopting a second side link, wherein the feedback information is feedback information based on a Coding Block Group (CBG).
The terminal of claim 40, wherein a first sequence carries feedback information for each CBG of the first TB.
The terminal according to claim 41, characterized in that the terminal further comprises a processing unit for:

selecting said one first sequence from a set of sequences depending on the reception of the CBG comprised by said first TB.
The terminal of claim 42, wherein different ones of the sequence sets correspond to different reception cases of CBGs included in a single TB.
The terminal of claim 43, wherein different sequences correspond to different Negative Acknowledgement (NACK) cases for CBGs comprised in a single TB; or

Different sequences correspond to different positive acknowledgement ACK cases of CBGs comprised by a single TB; or the like, or, alternatively,

the different sequences correspond to different combinations of ACKs and NACKs for CBGs included by a single TB.
The terminal according to any of claims 42 to 44, wherein the set of sequences is pre-set, configured on the network side, or configured by the terminal other than the terminal.
The terminal of claim 40, wherein the feedback information comprises feedback information for at least some CBGs of the first TB, wherein different CBGs of the first TB correspond to different feedback resources.
The terminal of claim 46, wherein the communication unit is further configured to: receiving first indication information;

the terminal further comprises a processing unit for: and determining feedback resources corresponding to each CBG in the at least part of CBGs based on the first indication information, so as to be used for sending the feedback information corresponding to each CBG.
The terminal of claim 47, wherein the first indication information carries information of feedback resources of individual CBGs of a single TB.
The terminal of claim 47 or 48, wherein the first indication information indicates a set of feedback resources for the terminal to select the feedback resources corresponding to each CBG of the at least partial CBGs.
The terminal according to any of claims 47 to 49, wherein the first indication information carries information of feedback resources of a partial CBG of a single TB, and is used to determine the feedback resources of the partial CBG and/or feedback resources of other partial CBGs based on the information of feedback resources of the partial CBG.
The terminal according to any of claims 46 to 50, characterized in that the terminal further comprises a processing unit for:

and determining a feedback resource corresponding to each CBG in the at least part of CBGs based on the resource occupied by the first sidelink and/or a third sidelink, so as to be used for sending the feedback information corresponding to each CBG, wherein the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.
The terminal according to claim 51, characterized in that the terminal further comprises a processing unit for:

and determining the feedback resource corresponding to each CBG in the at least part of CBGs based on the resources occupied by the first side link and/or the third side link and the corresponding relationship between the resources occupied by the side links and the feedback resources.
The terminal of claim 52, wherein the correspondence is pre-set, configured on a network side, or configured by a terminal other than the terminal.
The terminal of any one of claims 46 to 53, wherein the terminal employs the same feedback resources as other terminals in a terminal group to which the terminal belongs for the same CBG of the first TB.
The terminal according to any of claims 46 to 54, wherein the feedback information is carried over a second sequence; and is

The second sequence indicates NACK information without ACK information, or the second sequence indicates ACK information without NACK information.
The terminal according to any of claims 40 to 55, wherein the communication unit is further configured to:

receiving second indication information indicating CBG-based feedback for the first TB.
The terminal according to claim 56, wherein the second indication information is carried in a Physical Sidelink Control Channel (PSCCH), and wherein the second indication information is carried by an information field in a physical cell identity (SCI) in the PSCCH and/or a scrambling sequence of the SCI; or the like, or, alternatively,

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH; or the like, or, alternatively,

the second indication information is carried in broadcast information, Radio Resource Control (RRC) signaling or Downlink Control Information (DCI) sent by a network.
The terminal according to any of claims 40 to 57, wherein the communication unit is further configured to:

and receiving third indication information, wherein the third indication information indicates the sending condition of the CBG in the first TB.
The terminal of claim 58, wherein the third indication information is carried in a PSCCH, and wherein the third indication information is carried in an information field of a SCI in the PSCCH.
A terminal, characterized in that it comprises a communication unit for:

sending a first Transport Block (TB) to a first terminal by adopting a first sidelink;

and receiving feedback information aiming at the first TB, which is sent by the first terminal by adopting a second sidelink, wherein the feedback information is based on the Coding Block Group (CBG).
The terminal of claim 60, wherein a first sequence carries feedback information for each CBG of the first TB.
The terminal of claim 61, wherein the one first sequence belongs to a set of sequences.
The terminal of claim 62, wherein different ones of the sequence sets correspond to different reception cases of CBGs included in a single TB.
The terminal of claim 63, wherein different sequences correspond to different negative acknowledgement, NACK, cases for CBGs comprised in a single TB; or

Different sequences correspond to different positive acknowledgement ACK cases of CBGs comprised by a single TB; or the like, or, alternatively,

the different sequences correspond to different combinations of ACKs and NACKs for CBGs included by a single TB.
The terminal of claim 60, wherein the feedback information comprises feedback information for at least some CBGs of the first TB, wherein different CBGs of the first TB correspond to different feedback resources.
The terminal of claim 65, wherein the communication unit is further configured to:

sending first indication information to the first terminal;

the first indication information is used for the first terminal to determine a feedback resource corresponding to each CBG in the at least part of CBGs.
The terminal of claim 66, wherein the first indication information carries information of feedback resources of individual CBGs of a single TB.
The terminal of claim 66 or 67, wherein the first indication information indicates a set of feedback resources for the first terminal to select the feedback resources corresponding to each CBG of the at least part of CBGs.
The terminal according to any of claims 66 to 68, wherein the first indication information carries information of feedback resources of a partial CBG of a single TB, for the first terminal to determine the feedback resources of the partial CBG and/or feedback resources of other partial CBGs based on the information of feedback resources of the partial CBG.
The terminal according to any of claims 65 to 69, further comprising a processing unit configured to:

and determining a feedback resource corresponding to each CBG in the at least part of CBGs based on the resource occupied by the first sidelink and/or a third sidelink, so as to be used for sending the feedback information corresponding to each CBG, wherein the third sidelink carries the sidelink control information SCI corresponding to the first sidelink.
The terminal of claim 70, wherein the processing unit is further configured to:

and determining the feedback resource corresponding to each CBG in the at least part of CBGs based on the resources occupied by the first side link and/or the third side link and the corresponding relationship between the resources occupied by the side links and the feedback resources.
The terminal of claim 71, wherein the correspondence is pre-set, configured on a network side, or configured by a terminal other than the terminal.
The terminal according to any of claims 65 to 72, wherein the feedback information is carried over a second sequence; and is

The second sequence indicates NACK information without ACK information, or the second sequence indicates ACK information without NACK information.
The terminal according to any of claims 60 to 73, further comprising a processing unit configured to:

and determining the reception condition of the CBG in the first TB of other terminals in the terminal group to which the first terminal belongs based on the feedback information sent by the first terminal.
The terminal according to any of claims 60 to 74, wherein the communication unit is further configured to:

sending second indication information to the first terminal, wherein the second indication information indicates that the first TB is subjected to feedback based on CBG.
The terminal of claim 75, wherein the second indication information is carried in a Physical Sidelink Control Channel (PSCCH), and wherein the second indication information is carried by an information field in a physical cell identity (SCI) in the PSCCH and/or a scrambling sequence of the SCI; or the like, or, alternatively,

the second indication information is carried in a physical side uplink shared channel PSSCH, and the second indication information is carried through data in the PSSCH.
The terminal according to any of claims 60 to 76, wherein the processing unit is further configured to:

and sending third indication information to the first terminal, wherein the third indication information indicates the sending condition of the CBG in the first TB.
The terminal of claim 77, wherein the third indication information is carried in a PSCCH, and wherein the third indication information is carried by an information field of a SCI in the PSCCH.
A terminal, comprising: a processor and a memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of any one of claims 1 to 39.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 39.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 39.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 39.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 39.