WO2024092765A1

WO2024092765A1 - Psfch transmission method and apparatus, and device and storage medium

Info

Publication number: WO2024092765A1
Application number: PCT/CN2022/130015
Authority: WO
Inventors: 丁伊; 马腾
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2024-05-10

Abstract

A PSFCH transmission method and apparatus, and a device and a storage medium, which relate to the technical field of communications. The method comprises: when a PSFCH resource of a first terminal device overlaps a sidelink transmission resource of a second terminal device, and a first condition is met, the first terminal device not performing transmission on the PSFCH resource (910). When two terminal devices use an overlapped resource pool, one of the terminal devices can abandon PSFCH transmission according to a designed rule, thereby preventing an AGC problem that may arise, and thus improving the transmission success rate of the other terminal device.

Description

PSFCH transmission method, device, equipment and storage medium

Technical Field

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

Background technique

In SL (Sidelink) communication, the receiver can transmit HARQ (Hybrid Automatic Repeat reQuest) feedback information to the transmitter through PSFCH. With the evolution of technology, how terminal devices transmit PSFCH needs further study.

Summary of the invention

The embodiment of the present application provides a PSFCH transmission method, apparatus, device and storage medium. The technical solution is as follows:

According to one aspect of an embodiment of the present application, a PSFCH transmission method is provided, the method comprising:

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 transmission power corresponding to the PSFCH resource of the first terminal device is greater than or equal to the 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 sideline 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.

According to one aspect of an embodiment of the present application, a PSFCH transmission device is provided, the device comprising:

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:

According to one aspect of an embodiment of the present application, a terminal device is provided, the terminal device comprising a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the above method.

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 used to be executed by a processor to implement the above method.

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

According to one aspect of an embodiment of the present application, a computer program product is provided, the computer program product comprising a computer program, the computer program being stored in a computer-readable storage medium, and the processor reading and executing the computer program from the computer-readable storage medium to implement the above method.

The technical solution provided by the embodiments of the present application may have the following beneficial effects:

When two terminal devices use overlapping resource pools, one of the terminal devices can abandon PSFCH transmission according to designed rules, avoiding possible AGC problems, thereby improving the transmission success rate of the other terminal device.

BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

FIG5 is a schematic diagram of the physical layer structure of the NR SL system provided by an embodiment of the present application;

FIG6 is a schematic diagram of the physical layer structure of an LTE SL system provided by an embodiment of the present application;

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

FIG8 is a schematic diagram of PSCCH/PSSCH transmission between two terminals in an LTE SL system provided by an embodiment of the present application;

FIG9 is a flowchart of a PSFCH transmission method provided by an embodiment of the present application;

FIG10 is a block diagram of a PSFCH transmission device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of a terminal device provided in one embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

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 in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Please refer to FIG1 , 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 .

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

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, it is called gNodeB or gNB. With the evolution of communication technology, the name "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.

The number of terminal devices 13 is usually multiple, and one or more terminal devices 13 can be distributed in each cell managed by an 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 above-mentioned devices are collectively referred to as terminal devices. The access network device 14 and the core network device communicate with each other through some 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 air technology, such as the Uu interface.

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), 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 the traditional cellular system in which communication data is received or sent through an access network device, SL transmission has the characteristics of short delay and low overhead, and is suitable for communication between two terminal devices with close geographical locations (such as vehicle-mounted devices and other peripheral devices with close geographical locations). It should be noted that in Figure 1, only the vehicle-to-vehicle communication in the V2X (vehicle to everything) scenario is taken as an example, and SL technology can be applied to scenarios in which various terminal devices communicate directly with each other. In other words, the terminal device in this application refers to any device that communicates using SL technology.

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

Before introducing the technical solution of this application, some background technical knowledge involved in this application is first introduced and explained. The following related technologies can be combined arbitrarily with the technical solution of the embodiment of this application as optional solutions, and they all belong to the protection scope of the embodiment of this application. The embodiment of this application includes at least part of the following contents.

1.SL transmission

Device-to-device communication is a SL transmission technology. It is different from the traditional cellular system where communication data is received or sent through base stations. For example, the Internet of Vehicles system also uses device-to-device direct communication, so it has higher spectrum efficiency and lower transmission latency. Regarding device-to-device communication, 3GPP (3rd Generation Partnership Project) defines two transmission modes: Mode A and Mode B.

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.

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.

Figures 2 and 3 are only schematic, that is, the terminal device 24 in Figures 2 and 3 is schematically shown as a vehicle or a vehicle-mounted terminal, and the terminal device 24 may also be other terminal devices such as a smart phone, a wearable device, etc. In other words, the SL transmission involved in the embodiment of the present application is not limited to the Internet of Vehicles system, but may also be other types of SL transmission scenarios, and the embodiment of the present application does not specifically limit this.

2. HARQ feedback and PSFCH resources

For the transmission of the sender, the receiver will feedback ACK (Acknowledgement) or NACK (Negative Acknowledgement) (called ACK OR NACK) to the sender according to whether the reception is successful, or only feedback NACK (called NACK-Only). ACK represents successful reception and NACK represents failed reception. The receiver provides HARQ feedback to the sender through PSFCH.

Specifically, when the transmission is unicast (one sender and one receiver), the receiving end feeds back ACK when the reception is successful, and feeds back NACK when the reception fails. Correspondingly, the transmitting end retransmits when it detects NACK. Alternatively, when the transmitting end does not detect the HARQ feedback information from the receiving end, the transmitting end will also retransmit. In other words, for the ACK OR NACK mode, the transmitting end will retransmit when it detects the NACK fed back by the receiving end or when the transmitting end does not detect the HARQ feedback information from the receiving end.

When the transmission is multicast (send one to multiple receivers), it is divided into the following two modes.

(1) ACK OR NACK: The receiving end feeds back ACK when the reception is successful, and feeds back NACK when the reception fails. When the transmitting end detects NACK, it retransmits. For example, when the transmitting end detects at least one NACK, it retransmits. Alternatively, when the transmitting end does not detect the HARQ feedback information from the receiving end, the transmitting end also retransmits. That is, for the ACK OR NACK mode, the transmitting end will retransmit when it detects the NACK fed back by the receiving end or when the transmitting end does not detect the HARQ feedback information from the receiving end.

(2) NACK-Only: The receiving end feeds back NACK only when the reception fails, and does not feed back when the reception succeeds. When the sending end detects NACK, it retransmits. For example, when the sending end detects at least one NACK, it retransmits.

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, PSFCH resources are configured in the second to last 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 is that the entire frequency domain is configured with PSFCH resources. Optionally, only some PRBs (Physical Resource Blocks) 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 of 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 UE 2 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 for sending data. The frequency domain position and code domain resources of the PSFCH resource for feedback of HARQ information, for example, the specific code domain sequence corresponding to a certain PRB is determined by the corresponding PSSCH subchannel, source id, etc. It can be understood that the PSFCH resource finally determined for HARQ feedback refers to the code domain sequence corresponding to a certain PRB in a PSFCH symbol in a time slot configured with PSFCH resources. The receiving end uses the code domain sequence to send ACK or NACK.

3.NR V2X physical layer structure

For example, FIG5 is 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 AGC symbol is repeatedly transmitted on the AGC symbol. In FIG5, the PSCCH (Physical Sidelink Control Channel) is used to carry the first sidelink control information, which mainly includes the domain related to resource listening. The PSSCH is used to carry data and the second sidelink control information, which mainly includes the domain related to data demodulation. In a certain time slot, there may also be symbols corresponding to the PSFCH, which is used to transmit HARQ feedback information. Depending on the resource pool configuration, the symbols corresponding to the 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. 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 send on PSSCH and receive on PSFCH, and GP symbols are also needed for transceiver conversion.

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

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

5. Collaboration between terminals

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

Mode 1: UE A determines resources suitable for UE B transmission or resources unsuitable for UE B transmission, and UE B determines transmission resources using the resources suitable for UE B transmission or resources unsuitable for UE B transmission. The resources suitable for UE B transmission or resources unsuitable for UE B transmission can be transmitted through MAC CE (MAC Control Element, media access layer control unit) and SCI format 2-C, or only through MAC CE.

Mode 2: UE B indicates the transmission resources through SCI format 1-A, and 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 there is a conflict and/or half-duplex problem, UE A sends a resource conflict indication to UE B, which is sent through PSFCH. If UE B receives the resource conflict indication, it reselects the indicated transmission resources.

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

Taking the subcarrier spacing of 15kHz as an example, that is, 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 PSFCH to NR SL UE 2 in the time slot for the PSSCH sent by NR SL UE 2 to NR SL UE 1 in the previous time slot, and LTE SL UE 1 transmits PSCCH and PSSCH to LTE SL UE 2 in the subframe. As can be seen from Figure 8, LTE SL UE 2 only performs AGC adjustment in the first symbol, and adjusts according to the received power of the first symbol. However, NR SL UE 1 starts to transmit PSFCH in the third to last symbol. When NR SL and LTE SL work in overlapping frequency bands, the received power of LTE SL UE 2 starting from the third to last symbol will suddenly increase, and the AGC adjustment in the first symbol will no longer be applicable, thereby affecting the reception success rate of LTE SL UE 2 for PSCCH and PSSCH transmitted by LTE SL UE 1.

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 designed rules, avoiding possible AGC problems, thereby improving the transmission success rate of LTE SL UE.

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

1. First side control information

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

The format of the first side control information is SCI format 1-A, which includes some information fields as follows:

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

--Frequency resource assignment;

--Time resource assignment;

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

--Resource reservation period (Resource reservation period). When inter-TB resource reservation is deactivated in the resource pool configuration, this information field does not exist.

The above-mentioned time domain resource allocation domain and frequency domain resource allocation domain are used to indicate 2 or 3 transmission resources including the current transmission, and these 2 or 3 resources are used for the transmission of the same TB. For example, the SCI format1-A transmitted in the resource R(x1,y1) indicates the resource R(x1,y1) and the resource R(x2,y2), x is used to indicate the frequency domain position of the resource, y is used to indicate the time domain position of the resource, and the resource R(x2,y2) is located after the resource R(x1,y1) in the time domain.

The resource reservation period is used to indicate periodic reserved resources. For example, the resource reservation period is 100, and the time domain resource allocation domain and frequency domain resource allocation domain of SCI format1-A in the above R(x1, y1) indicate resources R(x1, y1) and resources R(x2, y2). Combined with the resource reservation period domain, the SCI indicates resources R(x1, y1+100) and resources R(x2, y2+100) at the same time. Resources R(x1, y1+100) and resources R(x2, y2+100) are used for the transmission of another TB.

2. Second side control information

The second side control information is the side control information in the PSSCH of NR SL.

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

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

--Redundant version of the data scheduled by the SCI;

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

--Destination ID, used to indicate the terminal device receiving the data scheduled by the SCI;

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

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

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.

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 that are suitable for UE 1 transmission or resources that are not suitable for UE 1 transmission.

3. Third side control information

The third side control information is the side control information of LTE SL.

The format of the third side control information is SCI format 1, and some of the information fields it contains are as follows:

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

This field is used to indicate the priority of PSSCH. The value range is 0 to 7, where a smaller value indicates a higher absolute priority.

--Resource reservation period;

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}.

--Frequency domain resource indication for initial transmission and retransmission;

--The time interval between initial transmission and retransmission;

--Retransmission index;

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.

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

The above-mentioned frequency domain resource indication of 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 position of the initial transmission and the retransmission, for example, resource R(x1,y1) and resource R(x2,y2).

The resource reservation period is used to indicate periodic reserved resources. For example, the resource reservation period is 100, the frequency domain resource indication of the initial transmission and retransmission of the SCI format 1 in the above R(x1,y1), the time interval between the initial transmission and the retransmission, and the retransmission index indicate the resource R(x1,y1) and the resource R(x2,y2). Combined with the resource reservation period domain, the SCI indicates the resource R(x1,y1+100) and the resource R(x2,y2+100) at the same time, and the resource R(x1,y1+100) and the resource R(x2,y2+100) are used for the transmission of another TB.

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:

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

In some embodiments, PSFCH resources refer to resources used to transmit PSFCH, such as used to transmit HARQ feedback information or used to transmit 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.

In some embodiments, the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device, including that the PSFCH resources of the first terminal device overlap with the sideline transmission resources of the second terminal device in the time domain. Exemplarily, the first terminal device and the second terminal device operate in overlapping frequency bands, such as using overlapping resource pools.

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.

In some embodiments, 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; 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.

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.

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 HARQ feedback information corresponding to the received first PSCCH and/or first PSSCH, or to transmit a 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. The sideline 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.

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

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.

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 by 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 by 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 resource R(x1,y1) and resource R(x2,y2) and Q groups of periodic resources with the same frequency domain position as resource R(x1,y1) and resource R(x2,y2) and a fixed time interval in the time domain, where Q is a positive integer. The above time interval is determined according to the resource reservation period in the third side 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, since 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, and the resource reservation period of 100 milliseconds needs to be converted into the number of logical subframes, for example, according to 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 side control information.

Exemplarily, from the perspective of the inside of the terminal device, the LTE module of the first terminal device listens to and decodes the third sideline control information, and transmits the above 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 satisfies the first condition, it abandons the transmission of its PSFCH.

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

Condition 1, 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.

Exemplarily, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined in the time domain, and the priority in the first sideline control information in the first PSCCH is lower than the priority in the third sideline control information, then NR SL UE 1 abandons PSFCH transmission.

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 feed back PSFCH to multiple terminal devices, the priority used for comparison is the highest priority among the priorities of the first sideline control information of the multiple first PSCCHs.

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.

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

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.

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.

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.

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 influence of the low-priority PSFCH transmission on the high-priority sideline transmission.

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

The resource conflict indication is used to indicate that the resource indicated by the first side control information intercepted by the first terminal device conflicts with the transmission resource of other terminal devices. It should be noted that the "other terminal devices" mentioned here are relative to the terminal device that sends the first side control information, and the "other terminal devices" mentioned here can be devices other than the first terminal device, or can be the first terminal device.

For example, the first terminal device is NR SL UE 1 and the second terminal device is LTE SL UE 1. NR SL UE 2 sends the first PSCCH and the first PSSCH, and the first sideline 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 sideline transmission resources of LTE SL UE 1 based on the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 in the time domain, NR SL UE 1 abandons the PSFCH transmission.

Optionally, resource conflicts include the following two possibilities:

(1) The first terminal device finds that the resources indicated by the first sideline control information of the third terminal device conflict with the sideline 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 the first sideline control information of NR SL UE 2 conflict with the sideline transmission resources of NR SL UE 3, then NR SL UE 1 sends a resource conflict indication to NR SL UE 2.

(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. Among them, 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.

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

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.

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.

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

Exemplarily, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined 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 the PSFCH transmission.

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 sending feedback information on the above 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.

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

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.

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.

Condition 4: the second sideline control information corresponding to the PSFCH resource of the first terminal device is in the target format.

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

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

Exemplarily, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined in the time domain, and if the second sideline control information carried in the first PSSCH is not SCI format 2-B, NR SL UE 1 abandons PSFCH transmission.

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

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

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

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

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

Condition 5: 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.

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

The transmission type can be indicated by the transmission type indication field in the second sideline 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 sideline control information corresponding to the PSFCH resource of the first terminal device is 10 or 01.

Exemplarily, the first terminal device is NR SL UE 1, and the second terminal device is LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined in the time domain, and if the transmission type indication field in the second sideline control information carried in the first PSSCH is 01 (representing multicast ACK or NACK) or 10 (representing unicast), NR SL UE 1 abandons PSFCH transmission.

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 sideline control information corresponding to the PSFCH resource of the first terminal device is 10 or 01, and the second sideline 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 sideline transmission resources of LTE SL UE 1 determined above in the time domain, and if the transmission type indication field in the second sideline control information carried in the first PSSCH is 01 or 10, and the second sideline control information is SCI format 2-A or SCI format 2-C, then NR SL UE 1 abandons PSFCH transmission.

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 sending end considers that retransmission is required. Therefore, the above condition 5 can be replaced by: the transmission type indication field in the second sideline 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 to illustrate, if the resources for NR SL UE 1 to transmit the above PSFCH overlap with the above-determined sideline transmission resources of LTE SL UE 1 in the time domain, and if the transmission type indication field in the second sideline 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.

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 resources 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 resources of the first terminal device is 00 or 11, the first terminal device transmits on the PSFCH resources.

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 influence of the HARQ feedback information that does not affect the HARQ feedback mechanism or the communication reliability on the sidelink transmission of the second terminal device.

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

Exemplarily, take the first terminal device as NR SL UE 1 and the second terminal device as LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined in the time domain, and if the redundancy version indicated in the second sideline control information carried in the first PSSCH belongs to the target redundancy version, NR SL UE 1 abandons PSFCH transmission.

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 is one, two or three.

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.

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 using 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, the NR SL UE 2 will retransmit again regardless of whether HARQ feedback is received or when no HARQ feedback is received. 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 whether or not HARQ feedback is received or not received refers to whether or not HARQ feedback is received or not received on the PSFCH resource corresponding to the PSSCH transmitted by NR SL UE 2. In other words, whether or not HARQ feedback is received or not received on the PSFCH resource that should receive HARQ feedback information.

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

According to condition 6, when the redundancy version indicated by the second side 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 point, which not only ensures the HARQ feedback mechanism but also reduces the interference to the side 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 without receiving HARQ feedback, so as to ensure the reliability of data transmission.

Condition 7: The PSFCH resources of the first terminal device are located in the target time unit.

For example, the first terminal device is NR SL UE 1, and the second terminal device is LTE SL UE 1. NR SL UE 2 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 sideline transmission resources of LTE SL UE 1 according to the third sideline control information sent by LTE SL UE 1. If the resources for NR SL UE 1 to transmit the above-mentioned PSFCH overlap with the above-mentioned sideline transmission resources of LTE SL UE 1 determined in the time domain, and the time unit for sending PSFCH belongs to the target time unit, NR SL UE 1 abandons PSFCH transmission.

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

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, the target time slot is one or more.

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.

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.

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.

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 the interference to 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 without receiving HARQ feedback, so as to ensure 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.

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, the first condition can include a combination of condition 1, condition 3 and condition 4, and so on, which are not described one by one in this application.

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).

The technical solution provided in the embodiment 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, thereby avoiding possible AGC problems and improving the transmission success rate of the other terminal device. For example, when NR SL and LTE SL use overlapping resource pools, NR SL UE can abandon PSFCH transmission according to the designed rules, thereby avoiding possible AGC problems and improving the transmission success rate of LTE SL UE.

The following are device embodiments of the present application, which can be used to execute 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.

Please refer to FIG. 10, which shows a block diagram of a PSFCH transmission device provided by an embodiment of the present application. The device has the function of implementing the above method example, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the first terminal device introduced above, or it can be set in the first terminal device. As shown in FIG. 10, the device 1000 may include: a processing module 1010.

Processing module 1010, 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:

In some embodiments, if the first terminal device intercepts 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.

In some embodiments, 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.

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 the multiple PSFCH resources.

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

Alternatively, the target format is SCI format 2-C;

Alternatively, the target format is SCI format 2-A.

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

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

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.

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 without receiving HARQ feedback;

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.

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;

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.

In some embodiments, the first sideline control information and the second sideline control information are sideline control information in the first communication system, and the third sideline control information is sideline control information in the second communication system.

It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, 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.

Regarding the device in the above embodiment, the specific way 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.

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 .

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.

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

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

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.

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

The first condition includes at least one of the following:

For details not described in detail in this embodiment, please refer to the above embodiments, which will not be described in detail here.

In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

The 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 optical disks, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

An embodiment of the present application also 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.

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

It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which 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 relationship between A and B.

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

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

In some embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, which is not limited in the present application.

The term "multiple" as used herein refers to two or more than two. "And/or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the related objects are in an "or" relationship.

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.

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 to that shown in the figure. The embodiments of the present application are not limited to this.

Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with 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 the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

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

Claims

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 transmission power corresponding to the PSFCH resource of the first terminal device is greater than or equal to the 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 sideline 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.
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.
The method according to claim 1 or 2 is characterized in that the resource conflict indication is used to indicate that the resources indicated by the first side control information intercepted by the first terminal device conflict with the transmission resources of other terminal devices.
The method according to any one of claims 1 to 3 is 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.
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.
The method according to any one of claims 1 to 5 is characterized in that the target transmission type includes at least one of the following: unicast, multicast with feedback ACK or NACK.
The method according to any one of claims 1 to 6, characterized in that the target redundancy version includes one or more redundancy versions.
The method according to any one of claims 1 to 7, characterized in that the target time unit includes one or more time units.
The method according to any one of claims 1 to 8 is 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.
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 without receiving HARQ feedback;

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.
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 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;

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.
The method according to claim 11 is characterized in that the first sideline control information and the second sideline control information are sideline control information in the first communication system, and the third sideline control information is sideline control information in the second communication system.
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 transmission power corresponding to the PSFCH resource of the first terminal device is greater than or equal to the 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 sideline 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.
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.
The device according to claim 13 or 14 is characterized in that the resource conflict indication is used to indicate that the resources indicated by the first side control information heard by the first terminal device conflict with the transmission resources of other terminal devices.
The device according to any one of claims 13 to 15 is 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.
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.
The device according to any one of claims 13 to 17 is characterized in that the target transmission type includes at least one of the following: unicast, multicast of feedback ACK or NACK.
The device according to any one of claims 13 to 18, characterized in that the target redundancy version includes one or more redundancy versions.
The device according to any one of claims 13 to 19, characterized in that the target time unit includes one or more time units.
The device according to any one of claims 13 to 20 is 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.
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 without receiving HARQ feedback;

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.
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.
The device according to claim 23 is characterized in that the first sideline control information and the second sideline control information are sideline control information in the first communication system, and the third sideline control information is sideline control information in the second communication system.
A terminal device, characterized in that the terminal device comprises a processor and a memory, the memory stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 12.
A computer-readable storage medium, characterized in that a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method according to any one of claims 1 to 12.
A chip, characterized in that the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the method according to any one of claims 1 to 12.
A computer program product, characterized in that the computer program product comprises a computer program, 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.