PSFCH transmission method and device, equipment and storage medium

Abstract

The invention discloses a PSFCH transmission method and device, equipment and a storage medium, and relates to the technical field of communication. The method comprises: when a PSFCH resource of a first terminal device overlaps a sideline transmission resource of a second terminal device and a first condition is satisfied, the first terminal device does not transmit on the PSFCH resource (910). When the two terminal devices use the overlapped resource pool, one of the terminal devices can give up PSFCH transmission according to the designed rule, so that the possible AGC problem is avoided, and the transmission success rate of the other terminal device is improved.

Description

PSFCH transmission method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a PSFCH (Physical Sidelink Feedback Channel) transmission method, apparatus, device, and storage medium. Background Art

[0002] In SL (Sidelink) communications, the receiver can transmit HARQ (Hybrid Automatic Repeat reQuest) feedback information to the transmitter via the PSFCH. As technology evolves, further research is needed on how terminal devices transmit the PSFCH.

[0003] Summary of the Invention

[0004] The present invention provides a method, apparatus, device, and storage medium for transmitting a PSFCH. The technical solution is as follows:

[0005] According to one aspect of an embodiment of the present application, a method for transmitting a PSFCH is provided, the method including:

[0006] When the PSFCH resource of the first terminal device overlaps with the sideline transmission resource of the second terminal device and the first condition is met, the first terminal device does not transmit on the PSFCH resource;

[0007] The first condition includes at least one of the following:

[0008] The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device;

[0009] The PSFCH resource of the first terminal device is used to transmit a resource conflict indication;

[0010] The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold;

[0011] The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format;

[0012] The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type;

[0013] The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version;

[0014] The PSFCH resources of the first terminal device are located in the target time unit.

[0015] According to one aspect of an embodiment of the present application, a PSFCH transmission device is provided, the device including:

[0016] A processing module, configured to not transmit on the PSFCH resource when the PSFCH resource of the first terminal device overlaps with the sideline transmission resource of the second terminal device and a first condition is met;

[0017] The first condition includes at least one of the following:

[0018] The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device;

[0019] The PSFCH resource of the first terminal device is used to transmit a resource conflict indication;

[0020] The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold;

[0021] The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format;

[0022] The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type;

[0023] The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version;

[0024] The PSFCH resources of the first terminal device are located in the target time unit.

[0025] According to one aspect of an embodiment of the present application, a terminal device is provided, comprising a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the above method.

[0026] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to be executed by a processor to implement the above method.

[0027] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the above method.

[0028] According to one aspect of an embodiment of the present application, a computer program product is provided, which includes a computer program stored in a computer-readable storage medium. A processor reads and executes the computer program from the computer-readable storage medium to implement the above method.

[0029] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0030] When two terminal devices use overlapping resource pools, one of the terminal devices can abandon PSFCH transmission according to the designed rules, avoiding possible AGC problems and thus improving the transmission success rate of the other terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0032] FIG2 is a schematic diagram of SL transmission mode A provided by an embodiment of the present application;

[0033] FIG3 is a schematic diagram of SL transmission mode B provided by an embodiment of the present application;

[0034] FIG4 is a schematic diagram of PSFCH resource configuration provided by an embodiment of the present application;

[0035] FIG5 is a schematic diagram of the physical layer structure of the NR SL system provided in one embodiment of the present application;

[0036] FIG6 is a schematic diagram of the physical layer structure of an LTE SL system provided in one embodiment of the present application;

[0037] FIG7 is a schematic diagram of PSFCH transmission between two terminals in an NR SL system provided by an embodiment of the present application;

[0038] FIG8 is a schematic diagram of PSCCH / PSSCH transmission between two terminals in an LTE SL system according to an embodiment of the present application;

[0039] FIG9 is a flowchart of a PSFCH transmission method provided by one embodiment of the present application;

[0040] FIG10 is a block diagram of a PSFCH transmission apparatus provided by one embodiment of the present application;

[0041] FIG11 is a schematic structural diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0043] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0044] Please refer to Figure 1, which shows a schematic diagram of a network architecture provided by an embodiment of the present application. The network architecture may include: a core network 11, an access network 12, and a terminal device 13.

[0045] The core network 11 includes several core network devices. The functions of the core network devices are mainly to provide user connections, user management, and service carrying, and to provide an interface to the external network as a bearer network. For example, the core network of a 5G (5th Generation) NR (New Radio) system may include devices such as an AMF (Access and Mobility Management Function) entity, a UPF (User Plane Function) entity, and an SMF (Session Management Function) entity.

[0046] The access network 12 includes several access network devices 14. The access network in the 5G NR system can be called NG-RAN (New Generation-Radio Access Network). The access network device 14 is a device deployed in the access network 12 to provide wireless communication functions for the terminal device 13. The access network device 14 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in the 5G NR system, they are called gNodeB or gNB. With the evolution of communication technology, the name of "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 13 are collectively referred to as access network devices.

[0047] The number of terminal devices 13 is usually multiple, and one or more terminal devices 13 can be distributed in the cell managed by each access network device 14. The terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (MS), etc. For the convenience of description, the devices mentioned above are collectively referred to as terminal devices. The access network device 14 and the core network device communicate with each other through some kind of air technology, such as the NG interface in the 5G NR system. The access network device 14 and the terminal device 13 communicate with each other through some kind of air technology, such as the Uu interface.

[0048] Terminal devices 13 and terminal devices 13 (for example, vehicle-mounted devices and other devices (such as other vehicle-mounted devices, mobile phones, RSU (Road Side Unit, road test unit), etc.)) can communicate with each other through a direct communication interface (such as a PC5 interface). Accordingly, the communication link established based on the direct communication interface can be called a direct link or SL. SL transmission is the direct communication and data transmission between terminal devices through a side link. Unlike traditional cellular systems where communication data is received or sent through access network equipment, SL transmission has the characteristics of short delay and low overhead, and is suitable for communication between two terminal devices that are geographically close (such as vehicle-mounted devices and other peripheral devices that are geographically close). It should be noted that in Figure 1, only vehicle-to-vehicle communication in the V2X (vehicle to everything) scenario is used as an example. SL technology can be applied to scenarios where direct communication is carried out between various terminal devices. In other words, the terminal device in this application refers to any device that communicates using SL technology.

[0049] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to the 5G NR system, and may also be applicable to subsequent evolution systems of the 5G NR system. In the embodiments of the present application, "terminal equipment" and "UE" are often used interchangeably, but those skilled in the art will understand that the two generally express the same meaning. In the embodiments of the present application, unless otherwise specified, the "network equipment" referred to refers to access network equipment, such as a base station.

[0050] Before introducing the technical solutions of this application, we first introduce and explain some of the background technologies involved in this application. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0051] 1.SL transmission

[0052] Device-to-device communication is a SL transmission technology that differs from traditional cellular systems, where communication data is received or sent via base stations. For example, connected vehicle systems also use direct device-to-device communication, resulting in higher spectrum efficiency and lower transmission latency. Regarding device-to-device communication, the 3rd Generation Partnership Project (3GPP) defines two transmission modes: Mode A and Mode B.

[0053] Mode A: As shown in Figure 2, the transmission resources of the terminal device 24 are allocated by the base station 25, and the terminal device 24 sends data on the side link according to the resources allocated by the base station; the base station 25 can allocate resources for a single transmission to the terminal device 24, and can also allocate resources for semi-static transmission to the terminal device 24.

[0054] Mode B: As shown in Figure 3, the terminal device 24 selects resources from the resource pool to transmit data. Specifically, the terminal device 24 can select transmission resources from the resource pool by listening or by random selection.

[0055] Figures 2 and 3 are for illustration only. The terminal device 24 in Figures 2 and 3 is shown as a vehicle or vehicle-mounted terminal. Terminal device 24 may also be a smartphone, wearable device, or other terminal device. In other words, the SL transmission involved in the embodiments of the present application is not limited to the Internet of Vehicles system and may also apply to other types of SL transmission scenarios, which are not specifically limited in the embodiments of the present application.

[0056] 2. HARQ feedback and PSFCH resources

[0057] For transmissions from the transmitter, the receiver will provide an ACK (Acknowledgement) or NACK (Negative Acknowledgement) (called ACK OR NACK), or only a NACK (called NACK-Only), depending on whether the transmission was received successfully. ACK indicates successful reception, while NACK indicates failed reception. The receiver provides HARQ feedback to the transmitter via the PSFCH.

[0058] Specifically, when transmission is unicast (one sender and one receiver), the receiver returns an ACK if reception is successful and a NACK if reception fails. Correspondingly, the transmitter retransmits if it detects a NACK. Alternatively, the transmitter will retransmit if it fails to detect HARQ feedback from the receiver. In other words, in ACK OR NACK mode, the transmitter retransmits if it detects a NACK from the receiver or fails to detect HARQ feedback from the receiver.

[0059] When the transmission is multicast (sending one message to multiple receivers), it is divided into the following two modes.

[0060] (1) ACK OR NACK: The receiving end returns an ACK when reception is successful and a NACK when reception fails. The transmitting end retransmits when it detects a NACK. For example, the transmitting end retransmits when it detects at least one NACK. Alternatively, the transmitting end retransmits when it does not detect HARQ feedback information from the receiving end. That is, in the ACK OR NACK mode, the transmitting end retransmits when it detects a NACK from the receiving end or when it does not detect HARQ feedback information from the receiving end.

[0061] (2) NACK-Only: The receiving end returns a NACK only when reception fails, and does not return a NACK when reception succeeds. The sending end retransmits when it detects a NACK. For example, the sending end retransmits when it detects at least one NACK.

[0062] PSFCH resources are configured for each resource pool. In NR-V2X, when configuring PSFCH resources, there are three configurations: N=1, N=2, and N=4. As shown in Figure 4, N=1 means that each time slot in the resource pool is configured with PSFCH resources, N=2 means that every 2 time slots in the resource pool are configured with PSFCH resources, and N=4 means that every 4 time slots in the resource pool are configured with PSFCH resources. More specifically, within a time slot, the PSFCH resource is configured in the penultimate symbol of the OFDM (Orthogonal Frequency Division Multiplexing) symbol that can be used for SL transmission in the time slot (note that in the frequency domain, the example in the figure above shows that the entire frequency domain is configured with PSFCH resources. Optionally, only part of the PRB (Physical Resource Block) can be configured as PSFCH resources). When UE 1 sends data (PSSCH (Physical Sidelink Shared Channel)) to UE 2 in time slot t, the HARQ feedback from UE 2 to UE 1 for this data transmission occurs in time slot t+a. Where a is greater than or equal to k, and time slot t+a contains PSFCH resources. In NR-V2X, k is 2 or 3 time slots. For example, in Figure 4, assuming N=4 and k=2, if UE 1 sends data to UE2 in time slot 1, t+a is time slot 4, and UE 2 performs HARQ feedback to UE 1 in time slot 4. If UE 1 sends data to UE 2 in time slot 3, t+a is time slot 8, and UE 2 performs HARQ feedback to UE 1 in time slot 8. Therefore, the time domain position of the PSFCH resource for feedback is determined according to the time domain position of the corresponding PSSCH that sends the data. The frequency domain location and code domain resources of the PSFCH resource for HARQ feedback, such as the code domain sequence corresponding to a specific PRB, are determined by the corresponding PSSCH subchannel, source ID, and other factors. It can be understood that the PSFCH resource ultimately determined for HARQ feedback refers to the code domain sequence corresponding to a specific PRB within a PSFCH symbol within a timeslot configured with the PSFCH resource. The receiver uses this code domain sequence to send an ACK or NACK.

[0063] 3.NR V2X physical layer structure

[0064] For example, Figure 5 shows a schematic diagram of the physical layer structure of the NR SL system. In the figure, the first symbol in the time slot is an AGC (Automatic Gain Control) symbol. When the SL UE receives, the receiving power can be adjusted in the symbol to a power suitable for demodulation. When the SL UE transmits, the content of the symbol after the symbol is repeated on the AGC symbol. In Figure 5, PSCCH (Physical Sidelink Control Channel) is used to carry the first sidelink control information, and the first sidelink control information mainly includes the domain related to resource listening. PSSCH is used to carry data and the second sidelink control information, and the second sidelink control information mainly includes the domain related to data demodulation. In a certain time slot, there may also be symbols corresponding to PSFCH, which is used to transmit HARQ feedback information. Depending on the resource pool configuration, the symbols corresponding to PSFCH may appear once every 1, 2, or 4 time slots. When there is no symbol corresponding to PSFCH in a time slot, such as the GAP symbol between PSSCH and PSFCH in Figure 5, the AGC and PSFCH symbols used to receive PSFCH are used to carry PSSCH. Normally, the last symbol in a time slot is a GP (Guard Period) symbol, or a GAP symbol. In other words, the next symbol after the last symbol carrying PSSCH or PSFCH is a GP symbol. The SL UE performs transceiver conversion within the GP symbol and does not transmit. When there are PSFCH resources in the time slot, there are also GP symbols between the PSSCH and PSFCH symbols. This is because the UE may transmit on PSSCH and receive on PSFCH, and GP symbols are also needed for transceiver conversion.

[0065] 4. LTE (Long Term Evolution) V2X physical layer structure

[0066] For example, Figure 6 shows an example of the physical layer structure of an LTE SL system. Similarly, the first symbol in the subframe in the figure is an AGC symbol. When the SL UE receives, the received power can be adjusted in this symbol to a power suitable for demodulation. In Figure 6, the PSCCH is used to carry the third sidelink control information, that is, the sidelink control information of LTE SL, and the PSSCH is used to carry data. (Note that LTE SL does not support PSFCH or second-order SCI (Sidelink Control Information)).

[0067] 5. Inter-terminal collaboration

[0068] Inter-terminal collaboration is a resource allocation scheme introduced by NR SL, which includes two modes.

[0069] Mode 1: UE A determines resources suitable for or unsuitable for transmission by UE B, and UE B uses the resources suitable for or unsuitable for transmission by UE B to determine transmission resources. The resources suitable for or unsuitable for transmission by UE B may be transmitted via a MAC Control Element (MAC CE) and SCI format 2-C, or via only the MAC CE.

[0070] Mode 2: UE B indicates transmission resources using SCI format 1-A. UE A determines whether the transmission resources indicated by UE B conflict with the transmission resources of other terminals or whether there is a half-duplex problem. If a conflict and / or half-duplex problem exists, UE A sends a resource conflict indication to UE B via the PSFCH. Upon receiving the resource conflict indication, UE B reselects the indicated transmission resources.

[0071] One of the current SL-related standard research projects is the coexistence of LTE Sidelink and NR Sidelink in overlapping frequency bands. When an NR SL UE or the NR module of a dual-mode UE transmits the PSFCH, it will cause AGC problems, affecting LTE SL transmission.

[0072] Taking a 15kHz subcarrier spacing as an example, where one NR SL time slot is equivalent to one LTE SL subframe, as shown in Figures 7 and 8, NR SL UE 1 feeds back the PSFCH to NR SL UE 2 within this time slot in response to the PSSCH sent by NR SL UE 2 to NR SL UE 1 in the previous time slot. Simultaneously, within this subframe, LTE SL UE 1 transmits the PSCCH and PSSCH to LTE SL UE 2. Figure 8 shows that LTE SL UE 2 performs AGC adjustment only in the first symbol, adjusting based on the received power of the first symbol. However, NR SL UE 1 begins transmitting the PSFCH in the third-to-last symbol. When NR SL and LTE SL operate in overlapping frequency bands, the received power of LTE SL UE 2 increases suddenly starting in the third-to-last symbol. The AGC adjustment performed in the first symbol is no longer applicable, affecting LTE SL UE 2's success rate in receiving the PSCCH and PSSCH transmitted by LTE SL UE 1.

[0073] Based on this, an embodiment of the present application provides a technical solution. When NR SL and LTE SL use overlapping resource pools, NR SL UE can abandon PSFCH transmission according to the designed rules, avoiding possible AGC problems, thereby improving the transmission success rate of LTE SL UE.

[0074] Before introducing the embodiments of the present application, in order to facilitate understanding of the following embodiments, the first sideline control information, the second sideline control information and the third sideline control information involved in the embodiments of the present application are first explained.

[0075] 1. First side control information

[0076] The first sidelink control information is the sidelink control information in the PSCCH of the NR SL.

[0077] The format of the first sideline control information is SCI format 1-A, which includes the following information fields:

[0078] --The priority of the scheduled PSSCH, that is, the priority of the corresponding PSSCH transmitted in the same time slot;

[0079] --Frequency resource assignment;

[0080] --Time resource assignment;

[0081] --Second-order SCI format, i.e., the format of the second sideline control information;

[0082] --Resource reservation period. This field does not exist when inter-TB resource reservation is deactivated in the resource pool configuration.

[0083] The time domain resource allocation field and frequency domain resource allocation field are used to indicate two or three transmission resources, including the current transmission, and these two or three resources are used to transmit the same TB. For example, the SCI format1-A transmitted in resource R(x1,y1) indicates resource R(x1,y1) and resource R(x2,y2), where x indicates the frequency domain position of the resource and y indicates the time domain position of the resource. Resource R(x2,y2) is located after resource R(x1,y1) in the time domain.

[0084] The resource reservation period is used to indicate periodic resource reservation. For example, if the resource reservation period is 100, the time domain resource allocation field and frequency domain resource allocation field of SCI format1-A in R(x1, y1) indicate resources R(x1, y1) and R(x2, y2). Combined with the resource reservation period field, the SCI also indicates resources R(x1, y1+100) and R(x2, y2+100). Resources R(x1, y1+100) and R(x2, y2+100) are used to transmit another TB.

[0085] 2. Second side control information

[0086] The second sidelink control information is the sidelink control information in the PSSCH of the NR SL.

[0087] The second sideline control information includes the following three formats: SCI format 2-A, SCI format 2-B and SCI format 2-C.

[0088] Some of the information fields included in SCI format 2-A are as follows:

[0089] --Redundant version of the data scheduled by the SCI;

[0090] --Source ID, used to indicate the terminal device that sends the data scheduled by the SCI;

[0091] --Destination ID, used to indicate the terminal device that receives the data scheduled by the SCI;

[0092] --HARQ enable / disable indication, used to indicate whether the receiving end needs HARQ feedback;

[0093] --Transmission type indication, 00 represents broadcast, 01 represents multicast (ACK or NACK), 10 represents unicast, and 11 represents multicast (Nack-only);

[0094] SCI format 2-B is used in NACK-only mode and adds indications of ZONE and distance requirements, indicating that terminal devices within a certain distance range need to feedback NACK when reception fails.

[0095] SCI format 2-C is used to transmit inter-UE coordination information. For example, UE 2 assists UE 1 in determining transmission resources and uses 2-C to indicate resources suitable for UE 1's transmission or resources not suitable for UE 1's transmission.

[0096] 3. Third side control information

[0097] The third sidelink control information is LTE SL sidelink control information.

[0098] The format of the third sideline control information is SCI format 1, which contains the following information fields:

[0099] --The priority of the scheduled PSSCH, that is, the priority of the corresponding PSSCH transmitted in the same subframe;

[0100] This field is used to indicate the priority of PSSCH, and the value range is 0 to 7, where a smaller value indicates a higher absolute priority;

[0101] --Resource reservation period;

[0102] This field is used to indicate the resource reservation period. The 4 bits are used to indicate a value from {0, 20ms, 50ms, 100ms, 200ms, 300ms, 400ms, 500ms, 600ms, 700ms, 800ms, 900ms, 1000ms}.

[0103] --Frequency domain resource indication for initial transmission and retransmission;

[0104] --The time interval between the initial transmission and the retransmission;

[0105] --Retransmission index;

[0106] This field is used to indicate whether the current transmission is an initial transmission or a retransmission. If it is 0, it means that the current transmission is an initial transmission. If it is 1, it means that the current transmission is a retransmission.

[0107] It should be noted that in LTE V2X, one TB only supports a maximum of two transmissions.

[0108] The frequency domain resource indications for the initial transmission and retransmission, the time interval between the initial transmission and the retransmission, and the retransmission index are used to indicate the time-frequency resource positions for the initial transmission and the retransmission, such as resource R(x1, y1) and resource R(x2, y2).

[0109] The resource reservation period is used to indicate periodic resource reservation. For example, if the resource reservation period is 100, the SCI format 1 in R(x1, y1) indicates the frequency domain resources for initial transmission and retransmission, the time interval between the initial transmission and retransmission, and the retransmission index indicates resource R(x1, y1) and resource R(x2, y2). Combined with the resource reservation period field, the SCI also indicates resource R(x1, y1+100) and resource R(x2, y2+100). Resource R(x1, y1+100) and resource R(x2, y2+100) are used for the transmission of another TB.

[0110] Please refer to Figure 9, which shows a flow chart of a PSFCH transmission method provided by an embodiment of the present application. The method can be applied to the network architecture shown in Figure 1, for example, the method can be performed by a first terminal device. The method may include the following steps:

[0111] Step 910: When the PSFCH resources of the first terminal device overlap with the sidelink transmission resources of the second terminal device and the first condition is met, the first terminal device does not transmit on the PSFCH resources.

[0112] In some embodiments, PSFCH resources refer to resources used to transmit PSFCH, such as for transmitting HARQ feedback information or for transmitting resource conflict indication. Sidelink transmission resources refer to resources used to transmit SL information, including but not limited to channels or signals such as PSCCH and / or PSSCH.

[0113] In some embodiments, the PSFCH resources of the first terminal device overlap with the sidelink transmission resources of the second terminal device, including the PSFCH resources of the first terminal device and the sidelink transmission resources of the second terminal device overlapping in the time domain. Exemplarily, the first terminal device and the second terminal device operate in overlapping frequency bands, such as using an overlapping resource pool.

[0114] In some embodiments, the first terminal device does not transmit on the PSFCH resources, which can be understood as the first terminal device giving up or avoiding transmission on the PSFCH resources.

[0115] In some embodiments, the first terminal device is a terminal device that supports operation in a first communication system and a second communication system, and the second terminal device is a terminal device that supports operation in the second communication system; wherein the first communication system and the second communication system are two different communication systems. Exemplarily, the first communication system is an NR system, and the second communication system is an LTE or E-UTRA (Evolved Universal Terrestrial Radio Access) system.

[0116] In some embodiments, the PSFCH resources of the first terminal device are used for PSFCH transmission in the first communication system, and the sideline transmission resources of the second terminal device are used for sideline transmission in the second communication system.

[0117] Exemplarily, the first terminal device is an NR SL UE, and the second terminal device is an LTE SL UE. The PSFCH resources of the first terminal device are used to transmit the HARQ feedback information corresponding to the received first PSCCH and / or first PSSCH, or to transmit the resource conflict (resource conflict) indication corresponding to the transmission resources indicated by the first PSCCH. The transmission of the first PSCCH and / or the first PSSCH is the transmission of NR SL. Exemplarily, the first terminal device is a dual-mode terminal device, and the PSFCH transmission and the reception of the first PSCCH and / or the first PSSCH are performed by its NR module (NR module). The side transmission resources of the second terminal device are used for the transmission of the second PSCCH and / or the second PSSCH. The transmission of the second PSCCH and / or the second PSSCH is the transmission of LTE SL.

[0118] In the embodiment of the present application, the first sideline control information and the second sideline control information mentioned below are sideline control information in the first communication system, and the third sideline control information is sideline control information in the second communication system.

[0119] Exemplarily, the first sideline control information and the second sideline control information are sideline control information corresponding to the first terminal device. Exemplarily, the first sideline control information and the second sideline control information are sideline control information in NR SL. Exemplarily, the first sideline control information is carried in PSCCH, for example, its format is SCI format 1-A. Exemplarily, the second sideline control information is carried in PSSCH, for example, its format is SCI format 2-A, SCI format 2-B or SCI format 2-C. Exemplarily, the third sideline control information is the sideline control information corresponding to the second terminal device. Exemplarily, the third sideline control information is the sideline control information in LTE SL. Exemplarily, the third sideline control information is carried in PSCCH, for example, its format is SCI format 1.

[0120] In some embodiments, the sideline transmission resources of the second terminal device are determined by the first terminal device based on the third sideline control information detected, and the third sideline control information is sent by the second terminal device. Optionally, the sideline transmission resources of the second terminal device are time-frequency resources determined based on the three indication fields of the frequency domain resource indication of the initial transmission and retransmission, the time interval between the initial transmission and retransmission, and the retransmission index indication in the third sideline control information. Exemplarily, they are the resources R(x1, y1) and resources R(x2, y2) indicated by the above three indication fields. Optionally, the sideline transmission resources of the second terminal device are time-frequency resources determined based on the frequency domain resource indication of the initial transmission and retransmission, the time interval between the initial transmission and retransmission, the retransmission index indication, and the resource reservation period in the third sideline control information. Exemplarily, the sideline transmission of the second terminal device is the repetition of the resources R(x1, y1) and resources R(x2, y2) determined by the first three indication fields in the time domain according to the resource reservation period. Exemplarily, it includes resources R(x1, y1) and resources R(x2, y2), as well as Q groups of periodic resources with the same frequency domain location as resources R(x1, y1) and resources R(x2, y2), and a fixed time interval in the time domain, where Q is a positive integer. The above time interval is determined based on the resource reservation period in the third sideline control information. Optionally, the above time interval is the resource reservation period. Optionally, the above time interval is the number of logical subframes converted from the resource reservation period. For example, because some subframes cannot be used for SL data transmission, such as subframes for transmitting synchronization signals, the subframes that can be used to transmit SL data are not continuous in time but are logically continuous. The resource reservation period of 100 milliseconds needs to be converted into the number of logical subframes, for example, based on the TDD (Time Division Duplexing) configuration. Exemplarily, Q is 1. Exemplarily, Q = 100 / Prx, where Prx is the resource reservation period indicated in the third sideline control information.

[0121] Exemplarily, from the perspective of the terminal device, the LTE module (LTE module) of the first terminal device listens to and decodes the third sideline control information, and passes the above-mentioned resources R(x1, y1) and R(x2, y2) (optionally including the resource reservation period) to the NR module of the first terminal device, and the NR module determines the sideline transmission resources of the second terminal device. When the NR module determines that the PSFCH it sends overlaps with the sideline transmission resources of the second terminal device in the time domain and meets the first condition, it abandons the transmission of its PSFCH.

[0122] In some embodiments, the first condition includes at least one of the following conditions 1 to 7:

[0123] Condition 1: The first priority is lower than or equal to the second priority. The first priority is the priority in the first sidelink control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sidelink control information corresponding to the sidelink transmission resource of the second terminal device.

[0124] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, and the priority in the first sidelink control information in the first PSCCH is lower than the priority in the third sidelink control information, NR SL UE 1 abandons PSFCH transmission.

[0125] Optionally, if the first terminal device detects multiple first sideline control information, the first priority is the highest priority among the multiple first sideline control information. Still using the above example, when NR SL UE 1 needs to feedback PSFCH to multiple terminal devices, the priority used for comparison is the highest priority among the priorities of the first sideline control information of multiple first PSCCHs.

[0126] Optionally, if the first terminal device detects multiple third-side control information, the second priority is the highest priority among the multiple third-side control information. Still using the above example, when NR SL UE 1 detects multiple third-side control information, the priority used for comparison is the highest priority among the multiple third-side control information.

[0127] It should be noted that, in the embodiments of the present application, "monitor" and "receive" have the same or similar meanings. For example, if the first terminal device monitors the first sideline control information, it can be understood that the first terminal device receives the first sideline control information; if the first terminal device monitors the third sideline control information, it can also be understood that the first terminal device receives the third sideline control information.

[0128] Optionally, when the priority value indicated by the third side control information is 0-7 and the priority value indicated by the first side control information is 1-8, it is necessary to reduce the priority value indicated by the first side control information by 1 or increase the priority value indicated by the third side control information by 1 for comparison.

[0129] Optionally, the lower the priority value, the higher the priority. In this case, the above-mentioned first priority is lower than or equal to the second priority, which means that the priority value in the first sideline control information corresponding to the PSFCH resource of the first terminal device is greater than or equal to the priority value in the third sideline control information corresponding to the sideline transmission resource of the second terminal device.

[0130] Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device and the first priority is higher than or equal to the second priority, the first terminal device transmits on the PSFCH resources. Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device and the first priority is higher than the second priority, the first terminal device transmits on the PSFCH resources.

[0131] Through condition 1, when the priority of the PSFCH transmission of the first terminal device is lower than the priority of the sideline transmission of the second terminal device, the first terminal device abandons its PSFCH transmission, thereby avoiding interference and impact of the low-priority PSFCH transmission on the high-priority sideline transmission.

[0132] Condition 2: The PSFCH resources of the first terminal device are used to transmit a resource conflict indication.

[0133] The resource conflict indication is used to indicate that the resources indicated by the first sideline control information detected by the first terminal device conflict with the transmission resources of other terminal devices. It should be noted that the "other terminal devices" mentioned here are relative to the terminal device that sent the first sideline control information. The "other terminal devices" mentioned here can be devices other than the first terminal device, or the first terminal device.

[0134] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH, and the first sidelink control information in its first PSCCH indicates the time-frequency resources R(x1, y1) and R(x2, y2), where y2 is greater than y1. NR SL UE 1 determines that the resource R(x2, y2) conflicts with the transmission resources of other terminal devices, and therefore transmits a resource conflict indication to NR SL UE 2 through PSFCH. NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, NR SL UE 1 abandons PSFCH transmission.

[0135] Optionally, resource conflicts include the following two possibilities:

[0136] (1) The first terminal device finds that the resources indicated by the third terminal device through the first sidelink control information conflict with the sidelink transmission resources of the fourth terminal device, then the first terminal device sends a resource conflict indication to the third terminal device. The first terminal device, the third terminal device and the fourth terminal device are different terminal devices working in the same communication system. For example, the first terminal device, the third terminal device and the fourth terminal device are different terminal devices working in the first communication system (such as the NR system). Still using the above example, when NR SL UE 1 finds that the resources indicated by NR SL UE 2 through the first sidelink control information conflict with the sidelink transmission resources of NR SL UE 3, then NR SL UE 1 sends a resource conflict indication to NR SL UE 2.

[0137] (2) The first terminal device is the receiving end of the third terminal device. The first terminal device finds that the resources indicated by the third terminal device through the first side control information conflict with the transmission resources of the first terminal device in the time domain, which will cause the first terminal device to be unable to receive the transmission of the third terminal device when sending, so the first terminal device sends a resource conflict indication to the third terminal device. The first terminal device and the third terminal device are different terminal devices working in the same communication system. For example, the first terminal device and the third terminal device are different terminal devices working in the first communication system (such as the NR system). Still using the above example, NR SL UE 1 is the receiving end of NR SL UE 2. NR SL UE 1 finds that the resources indicated by NR SL UE 2 through the first side control information conflict with the transmission resources of NR SL UE 1 in the time domain. Due to the half-duplex problem, NR SL UE 1 will be unable to receive the transmission of NR SL UE 2 when sending, so NR SL UE 1 sends a resource conflict indication to NR SL UE2.

[0138] Optionally, when the above (1) and (2) occur simultaneously, the first terminal device also needs to transmit a resource conflict indication through the PSFCH.

[0139] Optionally, when the PSFCH resources of the first terminal device overlap with the sidelink transmission resources of the second terminal device, and the PSFCH resources of the first terminal device are not used to transmit resource conflict indication (or the PSFCH resources of the first terminal device are used to transmit HARQ feedback information), the first terminal device transmits on the PSFCH resources.

[0140] Through condition 2, when the PSFCH resource of the first terminal device is used to transmit a resource conflict indication, the first terminal device abandons its PSFCH transmission. Since the priority of the resource conflict indication is relatively low, the interference and impact of the low-priority resource conflict indication on the high-priority side transmission can be avoided.

[0141] Condition 3: The transmission power corresponding to the PSFCH resource of the first terminal device is greater than or equal to the first threshold.

[0142] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, and the transmission power of the PSFCH determined by NR SL UE 1 is higher than the first threshold, NR SL UE 1 abandons PSFCH transmission.

[0143] Optionally, if the first terminal device sends feedback information on multiple PSFCH resources, the transmission power corresponding to the PSFCH resource of the first terminal device is the sum of the powers of the feedback information sent on the above-mentioned multiple PSFCH resources. Still using the above example, when NR SL UE 1 feeds back HARQ information for multiple terminal devices and needs to send multiple PSFCHs at the same time, the above condition 3 is that the sum of the transmission powers of multiple PSFCHs is greater than or equal to the first threshold.

[0144] Exemplarily, the first threshold is configured by the network, or preconfigured, or depends on the implementation of the first terminal device, or is a preset value specified by a standard.

[0145] Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, and the transmission power corresponding to the PSFCH resources of the first terminal device is less than or equal to a first threshold, the first terminal device transmits on the PSFCH resources.

[0146] Through condition 3, when the transmission power corresponding to the PSFCH resource of the first terminal device is large, the first terminal device abandons its PSFCH transmission, which can avoid the interference and impact of the high transmission power PSFCH transmission on the side transmission of the second terminal device.

[0147] Condition 4: The second sidelink control information corresponding to the PSFCH resource of the first terminal device is in the target format.

[0148] In some embodiments, the target format is a format other than SCI format 2-B.

[0149] In some embodiments, the above condition 4 is: the second sidelink control information corresponding to the PSFCH resource of the first terminal device is not SCI format 2-B.

[0150] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, and if the second sidelink control information carried in the first PSSCH is not SCI format 2-B, NR SL UE 1 abandons PSFCH transmission.

[0151] In some embodiments, the target format is SCI format 2-C. The above condition 4 is: the second sidelink control information corresponding to the PSFCH resource of the first terminal device is SCI format 2-C.

[0152] In some embodiments, the target format is SCI format 2-A. The above condition 4 is: the second sidelink control information corresponding to the PSFCH resource of the first terminal device is SCI format 2-A.

[0153] Optionally, the format of the second sidelink control information is determined according to the second-order SCI format in the first sidelink control information carried in the first PSCCH. For example, the second-order SCI format may be 11, 01, and 10, indicating SCI format 2-A, SCI format 2-B, and SCI format 2-C, respectively.

[0154] Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, and the second sideline control information corresponding to the PSFCH resources of the first terminal device is not in the target format, the first terminal device transmits on the PSFCH resources. Exemplarily, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, and the second sideline control information corresponding to the PSFCH resources of the first terminal device is SCI format 2-B, the first terminal device transmits on the PSFCH resources.

[0155] Through condition 4, when the second sidelink control information corresponding to the PSFCH resource of the first terminal device is in the target format, for example, when the second sidelink control information is not SCI format 2-B, the first terminal device abandons its PSFCH transmission, thereby avoiding interference and impact of the HARQ feedback information that does not affect the HARQ feedback mechanism or communication reliability on the sidelink transmission of the second terminal device.

[0156] Condition 5: The transmission type indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target transmission type.

[0157] In some embodiments, the target transmission type includes at least one of the following: unicast, groupcast of feedback ACK or NACK.

[0158] The transmission type can be indicated by the transmission type indication field in the second sidelink control information, for example, 00 represents broadcast, 01 represents multicast (ACK or NACK), 10 represents unicast, and 11 represents multicast (Nack-only). In some embodiments, the above condition 5 is: the transmission type indication field in the second sidelink control information corresponding to the PSFCH resource of the first terminal device is 10 or 01.

[0159] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-determined sidelink transmission resources of LTE SL UE 1 in the time domain, and if the transmission type indication field in the second sidelink control information carried in the first PSSCH is 01 (representing groupcast ACK or NACK) or 10 (representing unicast), NR SL UE 1 abandons PSFCH transmission.

[0160] Optionally, since the transmission type indication field only exists in SCI format 2-A and SCI format 2-C, the above condition 5 can be replaced by: the transmission type indication field in the second sidelink control information corresponding to the PSFCH resource of the first terminal device is 10 or 01, and the second sidelink control information is SCI format 2-A or SCI format 2-C. Still using the above example, if the resources for NR SL UE 1 to transmit the above PSFCH overlap with the sidelink transmission resources of LTE SL UE 1 determined above in the time domain, and if the transmission type indication field in the second sidelink control information carried in the first PSSCH is 01 or 10, and the second sidelink control information is SCI format 2-A or SCI format 2-C, then NR SL UE 1 abandons PSFCH transmission.

[0161] Optionally, since unicast is also an ACK-or-NACK mode, when the transmission type indication field is 10 or 01, the receiving end feeds back NACK or does not feed back, and the transmitting end believes that retransmission is required. Therefore, the above condition 5 can be replaced by: the transmission type indication field in the second sidelink control information corresponding to the PSFCH resource of the first terminal device is 10 or 01, and the HARQ feedback information that the first terminal device needs to send through the PSFCH resource is NACK. Still using the above example, if the resources for NR SL UE 1 to transmit the above PSFCH overlap with the above-determined sidelink transmission resources of LTE SL UE 1 in the time domain, and if the transmission type indication field in the second sidelink control information carried in the first PSSCH is 01 or 10, and the HARQ feedback information sent by NR SL UE 1 is NACK, then NR SL UE 1 abandons PSFCH transmission.

[0162] Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, and the transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is not the target transmission type, the first terminal device transmits on the PSFCH resources. Exemplarily, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, and the transmission type indication field in the second sideline control information corresponding to the PSFCH resource of the first terminal device is 00 or 11, the first terminal device transmits on the PSFCH resources.

[0163] Through condition 5, when the transmission type indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target transmission type, for example, when the transmission type indication field in the second sidelink control information is 10 or 01, the first terminal device abandons its PSFCH transmission, thereby avoiding interference and impact of the HARQ feedback information that does not affect the HARQ feedback mechanism or communication reliability on the sidelink transmission of the second terminal device.

[0164] Condition 6: The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version.

[0165] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, and if the redundancy version indicated in the second sidelink control information carried in the first PSSCH belongs to the target redundancy version, NR SL UE 1 abandons PSFCH transmission.

[0166] Optionally, the target redundancy version includes one or more redundancy versions. In other words, the target redundancy version may be one or more. For example, the target redundancy version may be one, two, or three.

[0167] Optionally, the target redundancy version is configured by the network, or pre-configured, or specified by a standard. Exemplarily, the target redundancy version is configured in a resource pool.

[0168] Optionally, after the third terminal device transmits the target redundant version to the first terminal device, the third terminal device retransmits to the first terminal device, or retransmits to the first terminal device when no HARQ feedback is received. Still taking the above example, the third terminal device is NR SL UE 2. After NR SL UE 2 transmits the target redundant version to NR SL UE 1, regardless of whether HARQ feedback is received or when no HARQ feedback is received, the NR SL UE 2 will retransmit again. Optionally, NR SL UE 2 retransmits the target redundant version and / or other redundant versions different from the target redundant version. Exemplarily, the above-mentioned regardless of whether HARQ feedback is received or not received refers to whether HARQ feedback is received or not received on the PSFCH resources corresponding to the PSSCH transmitted by NR SL UE 2. In other words, on the PSFCH resources that should receive HARQ feedback information, regardless of whether HARQ feedback is received or not received.

[0169] Optionally, when the PSFCH resources of the first terminal device overlap with the sidelink transmission resources of the second terminal device, and the redundant version indicated by the second sidelink control information corresponding to the PSFCH resources of the first terminal device is not the target redundant version, the first terminal device transmits on the PSFCH resources.

[0170] According to condition 6, when the redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version, the first terminal device abandons its PSFCH transmission. In the case of multicast, the terminals that abandon PSFCH transmission can abandon transmission at the same time, which not only ensures the HARQ feedback mechanism but also reduces interference with the sidelink transmission of the second terminal device. In addition, after the third terminal device transmits the target redundancy version to the first terminal device, the third terminal device retransmits to the first terminal device, or retransmits to the first terminal device if no HARQ feedback is received, thereby ensuring the reliability of data transmission.

[0171] Condition 7: The PSFCH resource of the first terminal device is located in the target time unit.

[0172] For example, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE2 sends the first PSCCH and the first PSSCH to NR SL UE 1, NR SL UE 1 transmits PSFCH to NR SL UE 2 for the data carried in the first PSSCH, and NR SL UE 1 determines the sidelink transmission resources of LTE SL UE 1 based on the third sidelink control information sent by the detected LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sidelink transmission resources of LTE SL UE 1 in the time domain, and the time unit for sending PSFCH belongs to the target time unit, NR SL UE 1 abandons PSFCH transmission.

[0173] Optionally, the target time unit includes one or more time units. In other words, the target time unit is one or more.

[0174] Optionally, the time unit is a time slot, and the above condition 7 may be: the PSFCH resource of the first terminal device is located in a target time slot. Optionally, there are one or more target time slots.

[0175] Optionally, the target time unit is configured by the network, or pre-configured, or specified by a standard. Exemplarily, the target time unit is configured in a resource pool. Exemplarily, the target time unit is repeated periodically in the resource pool.

[0176] Optionally, after the third terminal device transmits the first information to the first terminal device in the time unit corresponding to the target time unit, the third terminal device retransmits the first information to the first terminal device, or retransmits the first information to the first terminal device when no HARQ feedback is received. Still using the above example, the third terminal device is NR SL UE 2. After NR SL UE 2 transmits the first PSCCH and the first PSSCH in the time unit corresponding to the target time unit (for example, the time unit before the target time unit), the NR SL UE 2 will retransmit again within the target time unit regardless of whether HARQ feedback is received or when no HARQ feedback is received.

[0177] Optionally, when the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device and the PSFCH resources of the first terminal device are not located in the target time unit, the first terminal device transmits on the PSFCH resources.

[0178] According to condition 7, when the PSFCH resource of the first terminal device is located in the target time unit, the first terminal device abandons its PSFCH transmission. In the case of multicast, the terminals that abandon PSFCH transmission can abandon transmission at the same time point, which not only ensures the HARQ feedback mechanism but also reduces interference with the side transmission of the second terminal device. In addition, after the third terminal device transmits the first information to the first terminal device in the time unit corresponding to the target time unit, the third terminal device retransmits the first information to the first terminal device, or retransmits the first information to the first terminal device if no HARQ feedback is received, thereby ensuring the transmission reliability of the first information. Exemplarily, the first information refers to the information carried in the first PSCCH and / or the first PSSCH.

[0179] It should be noted that the first condition mentioned above can be any one of conditions 1 to 7, or a combination of multiple conditions in conditions 1 to 7. For example, the first condition can include a combination of condition 1 and condition 3, or a combination of condition 1, condition 3, and condition 4, etc. This application does not elaborate on each one.

[0180] In addition, for the third terminal device mentioned in the above embodiments, such as the third terminal device mentioned in Condition 6 and Condition 7, the third terminal device is a terminal device that works in the same communication system as the first terminal device. For example, the first terminal device and the third terminal device are different terminal devices working in the first communication system (such as the NR system).

[0181] The technical solution provided in the embodiments of the present application enables one of the terminal devices to abandon PSFCH transmission according to the designed rules when two terminal devices use overlapping resource pools, avoiding possible AGC problems, thereby improving the transmission success rate of the other terminal device. For example, when NR SL and LTE SL use overlapping resource pools, the NR SL UE can abandon PSFCH transmission according to the designed rules, avoiding possible AGC problems, thereby improving the transmission success rate of the LTE SL UE.

[0182] The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0183] Please refer to Figure 10, which shows a block diagram of a PSFCH transmission device provided by one embodiment of the present application. This device has the functions of implementing the above-mentioned method examples. These functions can be implemented in hardware or by hardware executing corresponding software implementations. This device can be the first terminal device described above, or it can be provided in the first terminal device. As shown in Figure 10, the device 1000 may include: a processing module 1010.

[0184] A processing module 1010 is configured to not transmit on the PSFCH resource when the PSFCH resource of the first terminal device overlaps with the sidelink transmission resource of the second terminal device and a first condition is met;

[0185] The first condition includes at least one of the following:

[0186] The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device;

[0187] The PSFCH resource of the first terminal device is used to transmit a resource conflict indication;

[0188] The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold;

[0189] The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format;

[0190] The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type;

[0191] The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version;

[0192] The PSFCH resources of the first terminal device are located in the target time unit.

[0193] In some embodiments, if the first terminal device intercepts multiple first sideline control information, the first priority is the highest priority among the multiple first sideline control information;

[0194] And / or, if the first terminal device detects multiple third side control information, the second priority is the highest priority among the multiple third side control information.

[0195] In some embodiments, the resource conflict indication is used to indicate that the resources indicated by the first sidelink control information monitored by the first terminal device conflict with the transmission resources of other terminal devices.

[0196] In some embodiments, if the first terminal device sends feedback information on multiple PSFCH resources, the transmission power corresponding to the PSFCH resource of the first terminal device is the sum of the powers of sending feedback information on multiple PSFCH resources.

[0197] In some embodiments, the target format is a format other than SCI format 2-B;

[0198] Alternatively, the target format is SCI format 2-C;

[0199] Alternatively, the target format is SCI format 2-A.

[0200] In some embodiments, the target transmission type includes at least one of the following: unicast, groupcast of feedback ACK or NACK.

[0201] In some embodiments, the target redundancy version includes one or more redundancy versions.

[0202] In some embodiments, the target time unit includes one or more time units.

[0203] In some embodiments, the target redundancy version and / or the target time unit are configured by the network, or pre-configured, or specified by a standard.

[0204] In some embodiments, after the third terminal device transmits the target redundancy version to the first terminal device, the third terminal device retransmits to the first terminal device, or retransmits to the first terminal device if no HARQ feedback is received;

[0205] And / or, after the third terminal device transmits the first information to the first terminal device in the time unit corresponding to the target time unit, the third terminal device retransmits the first information to the first terminal device, or retransmits the first information to the first terminal device without receiving HARQ feedback.

[0206] In some embodiments, the first terminal device is a terminal device that supports working in a first communication system and a second communication system, and the second terminal device is a terminal device that supports working in the second communication system;

[0207] The PSFCH resources of the first terminal device are used for PSFCH transmission in the first communication system, and the sideline transmission resources of the second terminal device are used for sideline transmission in the second communication system.

[0208] In some embodiments, the first sidelink control information and the second sidelink control information are sidelink control information in the first communication system, and the third sidelink control information is sidelink control information in the second communication system.

[0209] It should be noted that, when the device provided in the above embodiment realizes its function, it only uses the division of the above-mentioned functional modules as an example. In actual application, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0210] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

[0211] Please refer to FIG11 , which shows a schematic diagram of the structure of a terminal device provided by an embodiment of the present application. The terminal device 1100 may include: a processor 1101 , a transceiver 1102 , and a memory 1103 .

[0212] The processor 1101 includes one or more processing cores. The processor 1101 executes various functional applications and information processing by running software programs and modules.

[0213] The transceiver 1102 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0214] The memory 1103 may be connected to the processor 1101 and the transceiver 1102 .

[0215] The memory 1103 may be used to store a computer program executed by the processor, and the processor 1101 is used to execute the computer program to implement each step in the above method embodiment.

[0216] In an exemplary embodiment, the processor 1101 is configured to not transmit on the PSFCH resource when a PSFCH resource of the first terminal device overlaps with a sidelink transmission resource of the second terminal device and a first condition is met;

[0217] The first condition includes at least one of the following:

[0218] The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device;

[0219] The PSFCH resource of the first terminal device is used to transmit a resource conflict indication;

[0220] The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold;

[0221] The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format;

[0222] The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type;

[0223] The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version;

[0224] The PSFCH resources of the first terminal device are located in the target time unit.

[0225] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0226] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0227] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned PSFCH transmission method. Optionally, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or an optical disk, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0228] An embodiment of the present application further provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned PSFCH transmission method.

[0229] An embodiment of the present application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. A processor reads and executes the computer program from the computer-readable storage medium to implement the above-mentioned PSFCH transmission method.

[0230] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0231] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0232] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0233] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0234] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0235] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0236] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0237] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0238] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for transmitting a physical side feedback channel (PSFCH), characterized in that: The method comprises: When the PSFCH resource of the first terminal device overlaps with the sideline transmission resource of the second terminal device and the first condition is met, the first terminal device does not transmit on the PSFCH resource; The first condition includes at least one of the following: The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device; The PSFCH resource of the first terminal device is used to transmit a resource conflict indication; The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold; The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format; The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type; The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version; The PSFCH resources of the first terminal device are located in the target time unit.

2. The method according to claim 1, characterized in that If the first terminal device detects multiple first side control information, the first priority is the highest priority among the multiple first side control information; and / or, If the first terminal device detects multiple third side control information, the second priority is the highest priority among the multiple third side control information.

3. The method according to claim 1 or 2, characterized in that The resource conflict indication is used to indicate that the resources indicated by the first sideline control information monitored by the first terminal device conflict with the transmission resources of other terminal devices.

4. The method according to any one of claims 1 to 3, characterized in that If the first terminal device sends feedback information on multiple PSFCH resources, the transmission power corresponding to the PSFCH resource of the first terminal device is the sum of the powers of sending feedback information on multiple PSFCH resources.

5. The method according to any one of claims 1 to 4, characterized in that The target format is other than SCI format 2-B; or, The target format is SCI format 2-C; or, The target format is SCI format 2-A.

6. The method according to any one of claims 1 to 5, characterized in that The target transmission type includes at least one of the following: unicast, multicast of feedback ACK or NACK.

7. The method according to any one of claims 1 to 6, characterized in that The target redundancy version includes one or more redundancy versions.

8. The method according to any one of claims 1 to 7, characterized in that The target time unit includes one or more time units.

9. The method according to any one of claims 1 to 8, characterized in that The target redundancy version and / or the target time unit are configured by the network, or pre-configured, or specified by a standard.

10. The method according to any one of claims 1 to 9, characterized in that After the third terminal device transmits the target redundancy version to the first terminal device, the third terminal device retransmits to the first terminal device, or retransmits to the first terminal device if no HARQ feedback is received; and / or, After the third terminal device transmits the first information to the first terminal device in the time unit corresponding to the target time unit, the third terminal device retransmits the first information to the first terminal device, or retransmits the first information to the first terminal device without receiving HARQ feedback.

11. The method according to any one of claims 1 to 10, characterized in that The first terminal device is a terminal device that supports working in the first communication system and the second communication system, and the second terminal device is a terminal device that supports working in the second communication system; The PSFCH resources of the first terminal device are used for PSFCH transmission in the first communication system, and the sideline transmission resources of the second terminal device are used for sideline transmission in the second communication system.

12. The method according to claim 11, characterized in that The first sidelink control information and the second sidelink control information are sidelink control information in the first communication system, and the third sidelink control information is sidelink control information in the second communication system.

13. A transmission device for a physical side feedback channel (PSFCH), characterized in that: The device comprises: A processing module, configured to not transmit on the PSFCH resource when the PSFCH resource of the first terminal device overlaps with the sideline transmission resource of the second terminal device and a first condition is met; The first condition includes at least one of the following: The first priority is lower than or equal to the second priority, the first priority is the priority in the first sideline control information corresponding to the PSFCH resource of the first terminal device, and the second priority is the priority in the third sideline control information corresponding to the sideline transmission resource of the second terminal device; The PSFCH resource of the first terminal device is used to transmit a resource conflict indication; The transmit power corresponding to the PSFCH resource of the first terminal device is greater than or equal to a first threshold; The second sideline control information corresponding to the PSFCH resource of the first terminal device is in a target format; The transmission type indicated by the second sideline control information corresponding to the PSFCH resource of the first terminal device is the target transmission type; The redundancy version indicated by the second sidelink control information corresponding to the PSFCH resource of the first terminal device is the target redundancy version; The PSFCH resources of the first terminal device are located in the target time unit.

14. The device according to claim 13, characterized in that If the first terminal device detects multiple first side control information, the first priority is the highest priority among the multiple first side control information; and / or, If the first terminal device detects multiple third side control information, the second priority is the highest priority among the multiple third side control information.

15. The device according to claim 13 or 14, characterized in that The resource conflict indication is used to indicate that the resources indicated by the first sideline control information monitored by the first terminal device conflict with the transmission resources of other terminal devices.

16. The device according to any one of claims 13 to 15, characterized in that If the first terminal device sends feedback information on multiple PSFCH resources, the transmission power corresponding to the PSFCH resource of the first terminal device is the sum of the powers of sending feedback information on multiple PSFCH resources.

17. The device according to any one of claims 13 to 16, characterized in that The target format is other than SCI format 2-B; or, The target format is SCI format 2-C; or, The target format is SCI format 2-A.

18. The device according to any one of claims 13 to 17, characterized in that The target transmission type includes at least one of the following: unicast, multicast of feedback ACK or NACK.

19. The device according to any one of claims 13 to 18, characterized in that The target redundancy version includes one or more redundancy versions.

20. The device according to any one of claims 13 to 19, characterized in that The target time unit includes one or more time units.

21. The device according to any one of claims 13 to 20, characterized in that The target redundancy version and / or the target time unit are configured by the network, or pre-configured, or specified by a standard.

22. The device according to any one of claims 13 to 21, characterized in that After the third terminal device transmits the target redundancy version to the first terminal device, the third terminal device retransmits to the first terminal device, or retransmits to the first terminal device if no HARQ feedback is received; and / or, After the third terminal device transmits the first information to the first terminal device in the time unit corresponding to the target time unit, the third terminal device retransmits the first information to the first terminal device, or retransmits the first information to the first terminal device without receiving HARQ feedback.

23. The device according to any one of claims 13 to 22, characterized in that The first terminal device is a terminal device that supports working in the first communication system and the second communication system, and the second terminal device is a terminal device that supports working in the second communication system; The PSFCH resources of the first terminal device are used for PSFCH transmission in the first communication system, and the sideline transmission resources of the second terminal device are used for sideline transmission in the second communication system.

24. The device according to claim 23, characterized in that The first sidelink control information and the second sidelink control information are sidelink control information in the first communication system, and the third sidelink control information is sidelink control information in the second communication system.

25. A terminal device, characterized in that: The terminal device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 12.

26. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is configured to be executed by a processor to implement the method according to any one of claims 1 to 12.

27. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the method according to any one of claims 1 to 12.

28. A computer program product, characterized in that The computer program product includes a computer program, wherein the computer program is stored in a computer-readable storage medium, and a processor reads and executes the computer program from the computer-readable storage medium to implement the method according to any one of claims 1 to 12.

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