WO2020143510A1

WO2020143510A1 - Communication method and device

Info

Publication number: WO2020143510A1
Application number: PCT/CN2019/130776
Authority: WO
Inventors: 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2019-01-09
Filing date: 2019-12-31
Publication date: 2020-07-16
Also published as: CN111432371A

Abstract

A communication method and device. The method comprises: a first terminal device transmitting sidelink data to N terminal devices; the first terminal device receiving, on a first feedback resource, a positive acknowledgement (ACK) transmitted by at least one second terminal device of the N terminal devices, wherein the first feedback resource is a resource allocated to the N terminal devices for use in ACK feedback, and the at least one second terminal device is the terminal of the N terminal devices that correctly receives the sidelink data; and/or the first terminal device receiving, on a second feedback resource, a negative acknowledgement (NACK) transmitted by at least one third terminal device of the N terminal devices, wherein the second feedback resource is a resource allocated to the N terminal devices for use in NACK feedback, and the at least one third terminal device is the terminal device of the N terminal devices that incorrectly receives the sidelink data. The method and device in the present application can reduce the overhead for feedback resources and is applicable in the field of Internet-of-vehicles such as V2X or D2D.

Description

Communication method and device

Cross-reference of related applications

This application requires the priority of a Chinese patent application filed on January 09, 2019, with the application number 201910020017.6 and the application name "a communication method and device", the entire contents of which are incorporated by reference in this application.

Technical field

This application relates to the field of communication technology, and in particular, to a communication method and device.

Background technique

In the new radio (NR) system, the Internet of Vehicles (V2X) supports communication methods such as broadcast, multicast, and unicast. Broadcasting refers to the communication between one terminal device and multiple terminal devices. For example, broadcasting can refer to the communication between one terminal device and all terminal devices in the cell. Multicast refers to the communication between a terminal device and a group of terminal devices. Unicast refers to the communication between one terminal device and another terminal device.

One feedback mechanism for multicast is that each member of the communication group is allocated a feedback resource in advance, and the feedback resource is used to feed back acknowledgement (ACK) or negative confirmation (NACK). The UE at the sending end may send side data to the communication group. For any member of the communication group, if the side data is correctly received, ACK is fed back on the feedback resource, otherwise NACK is fed back.

It can be seen that, for the above feedback mechanism, each member of the communication group needs to be allocated a feedback resource, and the feedback resource has a large overhead.

Summary of the invention

This application provides a communication method and device to reduce the overhead of feedback resources. In a first aspect, a communication method is provided, including: a first terminal device sends side data to N terminal devices, where N is an integer greater than or equal to 2; the first terminal device receives on a first feedback resource A positive acknowledgement ACK sent by at least one second terminal device of the N terminal devices, the first feedback resource is a resource allocated to the N terminal devices for feedback ACK, and the at least one second terminal device It is a terminal among the N terminal devices that correctly receives the side data; and/or, the first terminal device receives at least one third terminal device among the N terminal devices on the second feedback resource for sending Negative acknowledgement of NACK, the second feedback resource is a resource allocated to the N terminal devices for NACK feedback, and the at least one third terminal device receives the sideline data in error among the N terminal devices Terminal.

In a possible design, the method further includes: if the first terminal device receives an ACK on the first feedback resource, the first terminal device determines that the side data transmission is successful; or , If the first terminal device does not receive a NACK on the second feedback resource, the first terminal device determines that the side data transmission is successful; or, if the first terminal device is in the first When an ACK is received on a feedback resource and NACK is not received on the second feedback resource, the first terminal device determines that the side data transmission is successful.

In a possible design, the method further includes: if the first terminal device does not receive an ACK on the first feedback resource, the first terminal device determines that the side data transmission fails; Or, if the first terminal device receives a NACK on the second feedback resource, the first terminal device determines that the side data transmission has failed; or, if the first terminal device is in the first If ACK is not received on a feedback resource and NACK is received on the second feedback resource, the first terminal device determines that the side data transmission fails.

In a possible design, the method further includes: if the first terminal device receives an ACK on the first feedback resource, and the received power of the ACK is greater than or equal to a first threshold, the The first terminal device determines that the transmission of the side data is successful, otherwise it is determined that the transmission of the side data fails; or, if the first terminal device receives a NACK on the second feedback resource, and the NACK Received power is greater than or equal to the second threshold, the first terminal device determines that the transmission of the side data fails, otherwise it is determined that the transmission of the side data is successful; or, if the first terminal device is in the When ACK is received on the first feedback resource and NACK is received on the second feedback resource, the first terminal device determines the side data according to the received power of the ACK and the received power of the NACK The transmission is successful or the side data transmission fails.

In a possible design, according to the received power of the ACK and the received power of the NACK, the first terminal device determines whether the side data transmission is successful or the side data transmission fails, including: The received power of the ACK is greater than or equal to a first threshold, the received power of the NACK is less than or equal to a second threshold, the first terminal device determines that the side data transmission is successful; or, if the received power of the ACK is less than Or equal to the first threshold, the received power of the NACK is greater than or equal to the second threshold, the first terminal device determines that the side data transmission fails; or, if the received power of the ACK is greater than or equal to The first threshold, the received power of the NACK is greater than or equal to the second threshold, the first terminal device determines that the side data transmission is successful or the side data transmission fails; or, if the ACK The received power of is less than or equal to the first threshold, the received power of the NACK is less than or equal to the second threshold, and the first terminal device determines that the side data transmission is successful or the side data transmission fails.

In a possible design, according to the received power of the ACK and the received power of the NACK, the first terminal device determines whether the side data transmission is successful or the side data transmission fails, including: If the received power of the ACK is greater than the received power of the NACK, the first terminal device determines that the side data transmission is successful; or, if the received power of the ACK is less than the received power of the NACK, the first terminal The device determines that the side data transmission fails; or, if the received power of the ACK is equal to the received power of the NACK, the first terminal device determines that the side data transmission is successful or the side data transmission fails.

In a possible design, the method further includes: if the first terminal device determines that the side data transmission fails, the first terminal device starts retransmission of the side data.

In a possible design, the first terminal device receiving, on the first feedback resource, a positive acknowledgement ACK sent by at least one second terminal device of the N terminal devices, includes: Receiving, on the first feedback resource, an ACK sent by at least one second terminal device of the N terminal devices through at least one of a side control channel, a side data channel, or a side feedback channel; and/or,

The first terminal device receiving on the second feedback resource a negative acknowledgement NACK sent by at least one third terminal device of the N terminal devices includes: the first terminal device receiving on the second feedback resource A NACK sent by at least one third terminal device of the N terminal devices through at least one of a side control channel, a side data channel, or a side feedback channel.

In a possible design, the first feedback resource and/or the second feedback resource are resources configured by a network device; or, the first feedback resource and/or the second feedback resource are a resource pool Resources.

In a second aspect, a communication method is provided, including: a second terminal device receives side data sent by a first terminal device; if the side data received by the second terminal device is correct, the second terminal device A positive acknowledgement ACK is sent on a feedback resource, and the first feedback resource is a resource allocated to N terminal devices for feedback ACK, where N is an integer greater than or equal to 2; or, if the second terminal device receives , The side line data is wrong, the second terminal device sends a negative acknowledgement NACK on the second feedback resource, and the second feedback resource is the resource allocated to the N terminal devices for NACK feedback, and the N The terminal device includes the second terminal device.

In a possible design, the second terminal device sending a positive acknowledgement ACK on the first feedback resource includes: the second terminal device passing the side control channel and side data on the first feedback resource At least one of the channel or the side feedback channel sends the ACK;

Sending a negative determination NACK on the second feedback resource by the second terminal device includes: the second terminal device passing the side control channel, the side data channel, or the side feedback channel on the second feedback resource At least one sends the NACK.

In a third aspect, a communication method is provided, including: a first terminal device sends side data to N terminal devices, where N is an integer greater than or equal to 2; the first terminal device receives on a first feedback resource First confirmation information; wherein, the first feedback resource is a resource allocated to the N terminal devices for feedback of the first confirmation information, the first confirmation information is a positive confirmation ACK, or the first confirmation information Acknowledge NACK for negation.

In a possible design, the first confirmation information is ACK, and the method further includes: the first terminal device determines the received power of the ACK; if the received power of the ACK is greater than or equal to a first threshold , The first terminal device determines that the transmission of the side data is successful; otherwise, the first terminal device determines that the transmission of the side data fails.

In a possible design, the first confirmation information is NACK, and the method further includes: the first terminal device determines the received power of the NACK; if the received power of the NACK is greater than or equal to a second threshold , The first terminal device determines that the transmission of the side data fails; otherwise, the first terminal device determines that the transmission of the side data is successful.

In a possible design, the method further includes: if the first terminal device determines that the transmission of the sideline data fails, the first terminal device starts retransmission of the sideline data.

In a possible design, the first terminal device receiving the first confirmation information on the first feedback resource includes: the first terminal device receiving at least one of the N terminal devices on the first feedback resource The first confirmation information sent by a second terminal device through at least one of a side control channel, a side data channel, or a side feedback channel.

In a possible design, the first feedback resource is a resource configured by a network device; or, the first feedback resource is a resource in a resource pool.

According to a fourth aspect, a communication method is provided, including: a second terminal device receives side data sent by a first terminal device; the second terminal device receives the side data according to whether the side data is received correctly or incorrectly, Sending first confirmation information, the first feedback resource is a resource allocated to N terminal devices for feedback of the first confirmation information, the first confirmation information is a positive confirmation ACK, or the first confirmation information is negative Acknowledge NACK, the N terminal devices include the second terminal device, and the N is an integer greater than or equal to 2.

In a possible design, the first confirmation information is ACK, and the second terminal device sends the first confirmation information on the first feedback resource according to whether the side data is received correctly or incorrectly, including : If the side data received by the second terminal device is correct, the second terminal device sends an ACK on the first feedback resource.

In a possible design, the first confirmation information is NACK, and the second terminal device sends the first confirmation information on the first feedback resource according to whether the side data is received correctly or incorrectly, including : If the side data received by the second terminal device is wrong, the first terminal device sends a NACK on the first feedback resource.

In a possible design, the second terminal device sending the first confirmation information on the first feedback resource includes that: the second terminal device passes the lateral control channel and the lateral line on the first feedback resource. At least one of a data channel or a side feedback channel sends the first confirmation information.

According to a fifth aspect, the present application provides a communication device, which is suitable for a chip in a first terminal device or a second terminal device, and includes a unit or means for performing the steps of the above first to fourth aspects.

In a sixth aspect, the present application provides a communication device, which is suitable for a chip in a first terminal device or a second terminal device, and includes at least one processing element and at least one storage element, where the at least one storage element is used to store a program and Data, the at least one processing element is used to perform the methods provided in the first to fourth aspects of the present application.

In a seventh aspect, the present application provides a communication device including at least one processing element (or chip) for performing the methods of the above first to fourth aspects.

In an eighth aspect, the present application provides a computer program product, the computer program product including computer instructions, which when executed by a computer, causes the computer to perform the method of any of the above aspects.

In a ninth aspect, the present application provides a computer-readable storage medium that stores computer instructions, and when the computer instructions are executed by a computer, the computer is caused to perform the method of any of the above aspects.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a communication architecture provided by an embodiment of this application;

2 is a flowchart of a communication method provided by an embodiment of this application;

3a is a flowchart of a communication method provided by an embodiment of this application;

3b is a flowchart of a communication method provided by an embodiment of this application;

3c is a flowchart of a communication method provided by an embodiment of the present application;

4 is a flowchart of a communication method provided by an embodiment of this application;

5 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

6 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

As shown in FIG. 1, it is a schematic diagram of a possible network architecture applicable to embodiments of the present application, including a terminal device 101 and a terminal device 102.

Among them, the terminal device 101 and the terminal device 102 can perform data transmission through the side link resources, and the side link resources can include at least one of time domain resources, frequency domain resources, code domain resources, air domain resources, and power domain resources. One. Specifically, the physical channels for data transmission between the terminal device 101 and the terminal device 102 may include a physical sidelink shared channel (physical sidelink shared channel, PSSCH) and a physical sidelink control channel (physical sidelink control channel, PSCCH) Or at least one of a physical sidelink feedback channel (PSFCH) and so on. Among them, PSSCH is used to transmit data, PSCCH is used to transmit control information, such as scheduling assignment (SA) information, and PSFCH is used to transmit feedback information, such as channel state information (channel state information (CSI), acknowledgement (acknowledgement, ACK) or negative acknowledgement (NACK), etc.

Optionally, the network architecture shown in FIG. 1 may further include a network device 103. For ease of description, in the following description, the terminal device 101 and the terminal device 102 are collectively referred to as terminal devices. The terminal device may also perform data transmission with the network device 103 through an air interface resource. The air interface resource may include at least one of time domain resources, frequency domain resources, and code domain resources. Specifically, when the network device 103 and the terminal device perform data transmission, the network device 103 may send control information to the terminal device through a control channel, such as a physical downlink control channel (physical downlink control channel, PDCCH), thereby allocating a data channel to the terminal device , Such as physical downlink shared channel (physical downlink shared channel, PDSCH) or physical uplink shared channel (physical uplink shared channel, PUSCH) resources. For example, the control information may indicate a symbol and/or resource block (RB) to which the data channel is mapped, and the network device 103 and the terminal device perform data transmission through the data channel at the allocated time-frequency resource. The above data transmission may include downlink data transmission and/or uplink data transmission. Downlink data (such as data carried by PDSCH) transmission may refer to the network device 103 sending data to the terminal device, and uplink data (such as data carried by PUSCH) transmission may be The terminal device sends data to the network device 103. The data can be generalized data, such as user data, system information, broadcast information, or other information.

In an example, the terminal device 101 and the terminal device 102 can utilize the side link resources for multicast or multicast communication. Wherein, multicast communication refers to communication between one terminal device and a group of terminal devices, and multicast communication refers to communication between one terminal device and multiple terminal devices. For example, as shown in FIG. 1, for multicast or multicast communication, the terminal device 101 serves as a sending-side terminal device, and the number of terminal devices 101 is one, and the terminal device 102 serves as a receiving-side terminal device, and the number of terminal devices 102 is multiple . Among them, when performing multicast or multicast communication between the terminal device 101 and the terminal device 102, a corresponding feedback mechanism needs to be designed. How to design a feedback mechanism for multicast or multicast communication is a technical problem to be solved in the embodiments of the present application.

The following explains some communication terms or terms used in this application. The communication terms or terms are also used as part of the invention content of this application.

1. Terminal equipment

Terminal equipment can be referred to as a terminal for short, is a device with wireless transceiver function, terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on the water (such as ships, etc.); can also be deployed in In the air (e.g. airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone, a device in a V2X system, a device in a D2D system, a device in an MTC system, a tablet, a computer with a wireless transceiver function, virtual reality (virtual reality, VR) ) Terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), wireless terminal equipment in self-driving (self driving), wireless terminal in remote medical (remote medical) Devices, wireless terminal devices in smart grids, wireless terminal devices in transportation safety, wireless terminal devices in smart cities, and wireless terminal devices in smart homes, And can also include user equipment (user equipment, UE) and so on. Terminal devices can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDAs), wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the 5th generation (5G) network in the future, or public land mobile communication networks that evolve in the future ( terminal equipment in public land mobile network (PLMN). Terminal equipment may sometimes be called terminal equipment, user equipment (UE), access terminal equipment, in-vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal Devices, mobile devices, UE terminal devices, terminal devices, wireless communication devices, UE agents or UE devices, etc. The terminal device may also be fixed or mobile. This embodiment of the present application is not limited thereto.

In the embodiment of the present application, the device for realizing the function of the terminal device may be a terminal; it may also be a device capable of supporting the terminal to realize the function, such as a chip system, and the device may be installed in the terminal. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solutions provided by the embodiments of the present application, the device for implementing the functions of the terminal is a terminal, and the terminal is a UE as an example to describe the technical solutions provided by the embodiments of the present application.

2. Network equipment

The network device may be an access network device, and the access network device may also be referred to as a radio access network (radio access network, RAN) device, which is a device that provides wireless communication functions for terminal devices. Access network equipment includes, for example, but not limited to: 5G next-generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B ( node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit) , BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc. The access network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or a network The device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network. The terminal device can communicate with multiple access network devices of different technologies, for example, the terminal device can communicate with an access network device that supports long-term evolution (LTE), and can also communicate with an access network device that supports 5G It can also be dual-connected to access network equipment that supports LTE and access network equipment that supports 5G. The embodiments of the present application are not limited.

In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; or may be an apparatus capable of supporting the network device to achieve the function, such as a chip system, and the apparatus may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the device for realizing the function of the network device is a network device, and the network device is a base station as an example to describe the technical solutions provided by the embodiments of the present application.

3. Sidelink (SL)

Side links can also be called side links, side links, side links, and so on. The side link is used for communication between the terminal device and the terminal device, and may include a physical side link shared channel (physical side link shared channel, PSSCH), a physical side link control channel (physical side link control channel, PSCCH) and Physical sidelink feedback channel (physical sidelink feedback channel, PSFCH). Among them, PSSCH is used to carry sidelink data (SL) data, PSCCH is used to carry sidelink control information (sidelink control information, SCI), the SCI may also be called sidelink scheduling allocation (sidelink scheduling assignment) assigment, SL SA). SL SA is used for data scheduling related information, such as resource allocation and/or modulation coding scheme (MCS) for carrying PSSCH and other information. The PSFCH can be used to transmit sidelink feedback control information (sidelink feedback control information, SFCI), and the sidelink feedback control information can include positive ACK or negative NACK.

4. Sidelink transmission

Sidelink transmission may refer to communication between terminal equipment and terminal equipment. Sidelink transmission can be applied to vehicle-to-vehicle (Vehicle to X, V2X) scenarios, where X can refer to any object. For example, vehicle-to-vehicle communications can include vehicles and vehicles (V2V), vehicles and roadside infrastructure (V2I), vehicles and pedestrians (vehicle to pedestrians, V2P), and vehicle and application servers (vehicle toto network, V2N), etc. The Internet of Vehicles may also be referred to as a cooperative-intelligent transportation system (C-ITS). Or, side link transmission may be applied to device-to-device (D2D) communication. D2D may refer to direct communication between terminal devices through technologies such as wireless network, Bluetooth, or D2D transmission.

Based on the communication system provided in FIG. 1, a communication method is provided. The principle of the communication method is: for multicast or multicast communication, two feedback resources are allocated to multiple terminal devices on the receiving side in advance, and each is a first feedback Resources and second feedback resources; the first feedback resources are used to feed back ACK, and the second feedback resources are used to feed back NACK. Among the multiple receiving terminal devices, the terminal devices that receive the correct side-line data all feed back ACK on the first feedback resource, and the terminal devices that receive the wrong side-line data all feedback NACK on the second feedback resource.

Based on the above principle, as shown in FIG. 2, a flow of a communication method is provided. The first terminal device in the flow may be the terminal device 101 in FIG. 1 described above, and the second terminal device may be the terminal device in FIG. 1 described above. 102, including:

S201. The first terminal device sends side data to N terminal devices. The N terminal devices include a second terminal device and a third terminal device, and the N is an integer greater than or equal to 2.

S202. The second terminal device and the third terminal device receive side data.

Exemplarily, if the second terminal device and the third terminal device receive the side data correctly, the second terminal device and the third terminal device send an ACK on the first feedback resource. Or, if the second terminal device and the third terminal device receive side data incorrectly, the second terminal device and the third terminal device send a NACK on the second feedback resource. Or, if the second terminal device receives the sideline data correctly, the second terminal device sends an ACK in the first feedback resource, and the third terminal device receives the sideline data in error, and the third terminal device sends a NACK in the second feedback resource.

Exemplarily, the second terminal device may send the ACK on the first feedback resource through at least one of a side control channel, a side data channel, or a side feedback channel. Correspondingly, the first terminal device receives on the first feedback resource an ACK sent by the second terminal device through at least one of a side control channel, a side data channel, or a side feedback channel.

Exemplarily, the third terminal device sends the NACK on the second feedback resource through at least one of a side control channel, a side data channel, or a side feedback channel. Correspondingly, the first terminal device receives, on the second feedback resource, a NACK sent by the third terminal device through at least one of a side control channel, a side data channel, or a side feedback channel.

Optionally, in the process shown in FIG. 2 above, for both the second terminal device and the third terminal device to receive side data correctly, the second terminal device and the third terminal device may send an ACK on the first feedback resource process. Referring to FIG. 3a, the process shown in FIG. 2 may also be included.

S203. The side data received by the second terminal device is correct, and an ACK is sent to the first feedback resource.

S204. The first terminal device receives ACK on the first feedback resource.

S205. The side data received by the third terminal device is correct, and ACK is sent on the first feedback resource.

S206. The first terminal device receives ACK on the first feedback resource.

It should be noted that in FIG. 3a, steps 203-204 and steps 205-206 are not in order.

Optionally, the process shown in FIG. 2 above is directed to a process in which the second terminal device and the third terminal device receive sideline data errors, and the second terminal device and the third terminal device send a NACK on the second feedback resource. Referring to FIG. 3b, the process shown in FIG. 2 may also be included.

S203. The side data received by the second terminal device is wrong, and a NACK is sent on the second feedback resource.

S204. The first terminal device receives NACK on the second feedback resource.

S205. The side data received by the third terminal device is wrong, and NACK is sent on the second feedback resource.

S206. The first terminal device receives NACK on the second feedback resource.

It should be noted that in FIG. 3b, steps 203-204 and steps 205-206 are not in order.

Optionally, in the process shown in FIG. 2 above, for the second terminal device to receive the side data correctly, the second terminal device may send an ACK on the first feedback resource, the third terminal device receives the side data incorrectly, and the third terminal The device may send a NACK on the second feedback resource. Referring to FIG. 3c, the process shown in FIG. 2 may further include:

S204. The first terminal device receives ACK on the first feedback resource.

S206. The first terminal device receives NACK on the second feedback resource.

It should be noted that in FIG. 3c, steps 203-204 and steps 205-206 are not in order.

As can be seen from the above, in the embodiments of the present application, for multicast or multicast communication, two feedback resources are allocated to multiple receiving side terminal devices, corresponding to each receiving side terminal in multicast or multicast communication Each device allocates a feedback resource, which reduces the overhead of the feedback resource.

Exemplarily, the first feedback resource and/or the second feedback resource may be configured by a network device. For example, the network device may use downlink control DCI or radio resource control RRC signaling or broadcast message MIB or system message SIB as the receiving side. The multiple terminal devices configure the first feedback resource and the second feedback resource. Alternatively, the first feedback resource and/or the second feedback resource may be resources in a resource pool. Optionally, the resource pool may be pre-configured, or resources configured by the network device. The resource pool is a resource shared by multiple terminal devices, and the resources used by a certain terminal device are selected from the resource pool. The specific selection method may be to monitor the occupancy of the resource pool and select feedback resources from idle resources. For example, the terminal device on the receiving side may monitor the occupancy of the resource pool when it needs to feedback ACK or NACK and select an idle resource to feed back ACK Or NACK. It should be noted that in response to the above situation, all resources on the receiving side terminal device feedback ACK or NACK need to be consistent, that is, if terminal device 1 selects idle resource 1 as the first feedback resource feedback ACK, terminal device 2 selects idle resource 2 As the second feedback resource feeds back NACK, other receiving terminal devices in the communication group (or multicast communication) must also select idle resource 1 as the first feedback resource feedback ACK and idle resource 2 as the second feedback resource feedback NACK . Alternatively, the terminal device on the sending side can monitor the occupancy of the resource pool, select two idle resources as the first feedback resource and the second feedback resource, and respectively use it to feed back ACK or NACK, and notify the receiving terminal of the two idle resources. Device, the terminal device on the receiving side uniformly feeds back ACK or NACK on the two idle resources.

It can be understood that the first feedback resource and the second feedback resource may be continuous resources in the time domain, such as resources of adjacent time slots or resources of adjacent symbols; or, the first feedback resource and the second feedback resource It may be a continuous resource in the frequency domain, such as resources of adjacent RBs, or the first feedback resource and the second feedback resource may be resources in which the time domain and the frequency domain are not continuous.

In the embodiment of the present application, the first terminal device may determine whether the transmission of the side data is successful according to the ACK received on the first feedback resource and/or the NACK received on the second feedback resource. Optionally, if the first terminal device determines that the side data transmission fails, the first terminal device may start retransmission of the side data. If the first terminal device determines that the side data transmission is successful, the first terminal device may no longer retransmit the side data and the transmission ends.

Exemplarily, the first terminal device may determine the success or failure of the transmission of the side data in the following manner.

Example 1: If the first terminal device receives an ACK on the first feedback resource, the first terminal device considers that the current side data transmission is successful.

Example 2: If the first terminal device does not receive NACK on the second feedback resource, the first terminal device considers that the current side data transmission is successful.

Example 3: If the first terminal device receives an ACK on the first feedback resource and does not receive a NACK on the second feedback resource, the first terminal device considers that the side data transmission is successful.

Example 4: If the first terminal device does not receive an ACK on the first feedback resource, the first terminal device considers that the side data transmission has failed.

Example 5: If the first terminal device receives a NACK on the second feedback resource, the first terminal device considers that the side data transmission has failed.

Example 6: If the first terminal device does not receive an ACK on the first feedback resource and receives a NACK on the second feedback resource, the first terminal device determines the side data transmission failure.

Exemplarily, the first terminal device may determine the success or failure of side data transmission in the following manner.

Example 1: If the first terminal device receives an ACK on the first feedback resource and the received power of the ACK is greater than or equal to a first threshold, the first terminal device determines the side data transmission Success, otherwise it is determined that the side data transmission failed. For example, the first threshold is 50 dBm, and if the received power of the ACK is 100 dBm, it can be determined that the side data transmission is successful. The first threshold may be configured by the network device or determined by the first terminal device itself. The first terminal may determine the first threshold according to certain conditions, for example, determining that the first threshold is the received power of the ACK of the second terminal device in the top 20% of the received power. Or configured by the network device, the network device may send the first threshold to the first terminal device through downlink control DCI or radio resource control RRC signaling or broadcast message MIB or system message SIB.

Example 2: If the first terminal device receives a NACK on the second feedback resource and the received power of the NACK is greater than or equal to a second threshold, the first terminal device determines the side data transmission Failure, otherwise it is determined that the side data transmission is successful. For example, the second threshold is 50 dBm, and if the received power of the NACK is 30 dBm, it can be determined that the side data transmission has failed. The second threshold may be configured by the network device to the first terminal device, or determined by the first terminal device itself. The first terminal may determine the second threshold according to certain conditions. For example, the second threshold is determined to be the NACK received power of the third terminal device in the top 20% of the received power. Or configured by the network device, the network device may send the second threshold to the first terminal device through downlink control DCI or radio resource control RRC signaling or broadcast message MIB or system message SIB.

Example 3: If the first terminal device receives an ACK on the first feedback resource and receives a NACK on the second feedback resource, the first terminal device uses the received power of the ACK and The received power of the NACK determines whether the side data transmission is successful or the side data transmission fails. Optionally, the first terminal device may determine whether the ACK or NACK is received through sequence detection or information analysis. Optionally, the first terminal device may determine the received power of ACK or NACK in an energy detection manner.

In an example, a specific implementation manner in which the first terminal device determines whether the side data transmission is successful or the side data transmission fails according to the ACK received power and the NACK received power may be as follows: The first terminal device determines the ACK received power and NACK Received power, determine the magnitude relationship between the ACK received power and the first threshold, and the magnitude relationship between the NACK received power and the second threshold, and determine the success or failure of the side data transmission based on the magnitude relationship between the received power and the threshold. Optionally, the size of the first threshold and the second threshold may be the same or different.

For example, the first terminal device may determine that the side data transmission is successful when the received power of ACK is greater than or equal to the first threshold and the received power of NACK is less than or equal to the second threshold. Alternatively, the first terminal device may determine that the side data transmission fails when the ACK received power is less than or equal to the first threshold and the NACK received power is greater than or equal to the second threshold. Alternatively, the first terminal device may determine that the side data transmission is successful or the side data transmission is successful when the ACK received power is greater than or equal to the first threshold and the NACK received power is greater than or equal to the second threshold failure. Alternatively, the first terminal device may determine that the side data transmission is successful or that the received power of the ACK is less than or equal to the first threshold and the received power of the NACK is less than or equal to the second threshold. Side data transmission failed. Exemplarily, in the above scenario, the first terminal device may determine whether the side data transmission is successful or the side data transmission fails according to the protocol or predefined rules.

In another example, the first terminal device may determine whether the side data transmission is successful or the side data transmission fails according to the ACK received power and the NACK received power. The specific implementation may be as follows: The first terminal device determines the ACK received power and NACK receiving power; judging the size relationship between ACK receiving power and NACK receiving power; according to the size relationship between the two, it is determined whether the side data transmission is successful or the side data transmission fails.

For example, the first terminal device may determine that the side data transmission is successful when the ACK received power is greater than the NACK received power. Alternatively, the first terminal device may determine that the side data transmission has failed when the received power of the ACK is less than the received power of the NACK. Alternatively, the first terminal device may determine that the side data transmission is successful or the side data transmission fails when the received power of the ACK is equal to the received power of the NACK. For example, when the received power of ACK and the received power of NACK are equal, the success of side data transmission can be determined according to the protocol, or the failure of side data transmission can be determined according to the protocol.

It can be understood that the size of the first threshold and the second threshold may be the same, or different. In the above example, the first threshold and the second threshold are the same as an example, and are not intended to limit the present application.

Based on the communication system provided in FIG. 1, a communication method is provided. The principle of the communication method is: for multicast or multicast communication, a feedback resource is allocated to N terminal devices on the receiving side in advance, and the feedback resource can be used for feedback ACK or NACK. For example, if the feedback resource is used to feed back ACK, for multiple receiving terminal devices in multicast or multicast communication, if the received sideline data is correct, the ACK is fed back on the feedback resource. For N terminal devices in multicast or multicast communication, if the data on the receiving side is incorrect, the NACK is no longer fed back to the terminal device on the sending side. For example, if the feedback resource is used to feed back NACK, for multiple receiving terminal devices in multicast or multicast communication, if the data on the receiving side is incorrect, NACK is fed back on the feedback resource. For terminal devices that receive correct side data, ACK is no longer fed back.

According to the above principle, as shown in FIG. 4, a flow of a communication method is provided. The first terminal device in the flow may be the above-mentioned terminal device 101 in FIG. 1, and the second terminal device and the third terminal device may be the above-mentioned figures. The terminal device 102 in 1 includes:

S401. The first terminal device sends side data to N terminal devices, where the N terminal devices include a second terminal device, and the N is an integer greater than or equal to 2.

S402. The second terminal device receives the side data.

S403. The second terminal device sends first confirmation information on the first feedback resource.

S404. The first terminal device receives the first confirmation information on the first feedback resource.

The first feedback resource is used to feed back first confirmation information, and the first confirmation information may be ACK or NACK.

Optionally, the second terminal device may send the first confirmation information on at least one of a side control channel, a side data channel, or a side feedback channel on the first feedback resource. Correspondingly, the first terminal device receives the first confirmation information on the first feedback resource through at least one of a side control channel, a side data channel, or a side feedback channel.

Exemplarily, the first feedback resource is used to feed back ACK, the side data received by the second terminal device is correct, and the second terminal device sends ACK on the first feedback resource. For the third terminal device among the N terminal devices, the third terminal device receives a side data error, and the third terminal device no longer feeds back NACK information to the first terminal device. Correspondingly, when receiving the ACK on the first feedback resource, the first terminal device can determine the received power of the ACK. If the received power of the ACK is greater than or equal to the first threshold, it is determined that the side data transmission is successful, otherwise, the side is determined Line data transmission failed.

As can be seen from the above, in the above example, a feedback resource is allocated for N terminal devices for feedback ACK. The terminal devices that correctly receive the side data in N terminals all feed back ACK on the feedback resource, and the terminal devices that receive the wrong side data no longer feedback NACK. Compared with allocating a feedback resource to each user, the feedback resource overhead is saved.

Exemplarily, the first feedback resource may be used to feed back NACK, the side data received by the second terminal device is wrong, and the second terminal device sends NACK on the first feedback resource. For the third terminal device among the N terminal devices, the third terminal device receives the side data correctly, and the third terminal device no longer feeds back ACK information to the first terminal device. Correspondingly, when receiving the NACK on the first feedback resource, the first terminal device may determine the received power of the NACK. If the received power of NACK is greater than or equal to the second threshold, it is determined that the side data transmission fails, otherwise it is determined that the side data transmission is successful.

As can be seen from the above, in the above example, a feedback resource is allocated to multiple terminal devices for NACK feedback. Among the N terminal devices, the terminal devices receiving the wrong side data send NACK on the feedback resource, and the terminal devices receiving the correct side data no longer feedback the ACK. Compared with allocating a feedback resource to each user, the feedback resource overhead is saved.

Optionally, the method flow shown in FIG. 4 may further include: if it is determined that the transmission of the sideline data fails, starting a restart of the sideline data. If it is determined that the transmission of the side data is successful, the retransmission is no longer and the transmission of the side data is ended.

Optionally, the first feedback resource may be allocated by a network device to N receiving terminal devices in multicast or multicast communication. For example, the network device may notify the first feedback resource to the first feedback resource through DCI or RRC signaling. N receiving terminal devices. Alternatively, the first feedback resource may be a resource in a resource pool. For example, the first terminal device on the sending side may monitor in a pre-configured resource pool or a resource pool configured by a base station to determine an idle resource as the first feedback resource. The first feedback resource is indicated to multiple terminal devices on the receiving side. For example, the first terminal device may notify the multiple terminal devices on the receiving side of the first feedback resource through the PSSCH or PSCCH. Or, any one of the multiple terminal devices on the receiving side, for example, the above-mentioned second terminal device may determine the idle resource as the first feedback resource in the resource pool, and use the first feedback resource to feed back ACK or NACK. For other terminal devices among multiple terminal devices on the receiving side, the first feedback resource must also be used to feed back ACK or NACK.

Optionally, the above feedback mechanism may add some feedback conditions, and only provide feedback when the conditions are met. For example, if the channel quality of the third terminal device is greater than or equal to a threshold, NACK is fed back on the second resource, otherwise no feedback is given. As another example, if the channel quality of the second terminal device is less than or equal to a threshold, the ACK is fed back on the first resource, otherwise it is not fed back.

Optionally, the above feedback mechanism may add some non-feedback conditions, and stop the feedback when the non-feedback conditions are met. For example, if the channel quality of the second terminal device is greater than or equal to a threshold, stop feeding back ACK on the first resource, otherwise feed back ACK on the first resource. For another example, if the channel quality of the third terminal device is less than or equal to a threshold, stop feeding back NACK on the second resource, otherwise feed back NACK on the second resource.

Optionally, the above feedback mechanism may be started or terminated by the network device. The network device may send a command to start a resource-saving feedback mechanism to the first terminal device through downlink control DCI or radio resource control RRC signaling or broadcast message MIB or system message SIB. The first terminal device broadcasts only two resources to the group in the communication group member. The network device may send a command to terminate the resource saving feedback mechanism to the first terminal device through downlink control DCI or radio resource control RRC signaling or a broadcast message MIB or system message SIB. The first terminal device terminates the resource saving feedback mechanism and falls back to the default Feedback mechanism, that is, the members of the communication group feed back ACK or NACK to specific resources of each terminal device.

Optionally, the above feedback mechanism can be switched to use with the existing mechanism. The network device may send a command to the first terminal device through downlink control DCI or radio resource control RRC signaling or broadcast message MIB or system message SIB to inform the first terminal device whether to use the resource-saving feedback mechanism or the existing mechanism.

In the above embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of network devices, terminals, and interaction between network devices and terminals, respectively. In order to realize each function in the method provided by the embodiments of the present application, the network device and the terminal may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application of the technical solution and design constraints.

Similar to the above concept, as shown in FIG. 5, an embodiment of the present application further provides an apparatus 500 for implementing the function of the terminal device in the above method. The device may be a terminal device or a device in the terminal device. Among them, the device may be a chip system. In the embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. The apparatus 500 may include: a transceiver module 501. Optionally, the device 500 may further include a processing module 502.

In an example, the apparatus 500 may be applied to a first terminal device, and used to implement the function of the first terminal device in the above method. The transceiver module 501 is used to send side data to N terminal devices, where N is an integer greater than or equal to 2;

The transceiver module 501 is further configured to receive a positive acknowledgement ACK sent by at least one second terminal device among the N terminal devices on a first feedback resource, where the first feedback resource is allocated to the N terminal devices To feed back ACK resources, the at least one second terminal device is a terminal among the N terminal devices that correctly receives the side data; and/or,

The transceiver module 501 is further configured to receive a negative acknowledgement NACK sent by at least one third terminal device among the N terminal devices on a second feedback resource, where the second feedback resource is allocated to the N terminal devices In order to feed back NACK resources, the at least one third terminal device is a terminal among the N terminal devices that erroneously receives the side data.

In an example, the apparatus 500 may be applied to a second terminal device, for implementing the function of the second terminal device in the above method. The transceiver module 501 is used to receive the side data sent by the first terminal device; the transceiver module 501 is also used to send a positive acknowledgement ACK on the first feedback resource when the received side data is correct. It is a resource allocated to N terminal devices for feedback ACK, where N is an integer greater than or equal to 2; or, the transceiver module 501 is also used to send on the second feedback resource when the received sideline data is wrong NACK is negatively acknowledged, and the second feedback resource is a resource allocated to the N terminal devices for NACK feedback, and the N terminal devices include the second terminal device.

For the specific execution process of the transceiver module 501 and the processing module 502, refer to the description in the method embodiment above. The division of the modules in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another way of dividing. In addition, the functional modules in the embodiments of the present application may be integrated into one process In the device, it can also exist alone physically, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules.

Similar to the above concept, as shown in FIG. 6, an embodiment of the present application provides an apparatus 600 for implementing the functions of the terminal device in the above method. The device may be a terminal device or a device in the terminal device.

The apparatus 600 includes at least one processor 601, configured to implement the function of the first terminal device in the above method. For example, the processor 601 may determine whether to retransmit the side data based on the ACK received on the first feedback resource and/or the NACK received on the second feedback resource. For details, please refer to the detailed description in the method.

The apparatus 600 may further include at least one memory 602 for storing program instructions and/or data. The memory 602 and the processor 601 are coupled. The coupling in the embodiments of the present application is an interval coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 601 may cooperate with the memory 602. The processor 601 may execute program instructions stored in the memory 602. At least one of the at least one memory may be included in the processor.

The device 600 may further include a communication interface 603 for communicating with other devices through a transmission medium, so that the device used in the device 600 can communicate with other devices. Exemplarily, the communication interface 603 may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a second terminal device or a network device. The processor 601 uses the communication interface 603 to send and receive data, and is used to implement the method in the above embodiment.

The embodiments of the present application do not limit the connection media between the communication device 603, the processor 601, and the memory 602. In the embodiment of the present application, in FIG. 6, the memory 602, the processor 601, and the communication interface 603 are connected by a bus 604. The bus is shown by a thick line in FIG. 6, and the connection mode between other components is only for schematic illustration. , Not to limit. The bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, only a thick line is used in FIG. 6, but it does not mean that there is only one bus or one type of bus.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may be implemented or Perform the disclosed methods, steps, and logical block diagrams in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.

In the embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random access memory (random-access memory, RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in the embodiment of the present application may also be a circuit or any other device capable of realizing a storage function, which is used to store program instructions and/or data.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, a network device, user equipment, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, digital video disc (DVD)), or a semiconductor medium (for example, SSD).

Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

It can be understood that, in the embodiments of the present application, and/or" describes the association relationship of the associated objects, indicating that there may be three types of relationships, for example, A and/or B, which may indicate: A exists alone, and A and B, there are three cases of B alone. The character "/" generally indicates that the related object is a "or" relationship. In addition, in the description of this application, the words "first" and "second" are only It is used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, or as indicating or implying order.

Claims

A communication method, characterized in that it includes:

The first terminal device sends side data to N terminal devices, where N is an integer greater than or equal to 2;

The first terminal device receives a positive acknowledgement ACK sent by at least one second terminal device of the N terminal devices on a first feedback resource, and the first feedback resource is allocated to the N terminal devices for ACK resource feedback, the at least one second terminal device is a terminal among the N terminal devices that correctly receives the side data; and/or,

The first terminal device receives a negative acknowledgement NACK sent by at least one third terminal device among the N terminal devices on a second feedback resource, and the second feedback resource is used for allocating to the N terminal devices In response to NACK resources, the at least one third terminal device is a terminal among the N terminal devices that erroneously receives the side data.
The method according to claim 1, wherein the method further comprises:

If the first terminal device receives an ACK on the first feedback resource, the first terminal device determines that the side data transmission is successful; or,

If the first terminal device does not receive a NACK on the second feedback resource, the first terminal device determines that the side data transmission is successful; or,

If the first terminal device receives an ACK on the first feedback resource and does not receive a NACK on the second feedback resource, the first terminal device determines that the side data transmission is successful.
The method according to claim 1 or 2, wherein the method further comprises:

If the first terminal device does not receive an ACK on the first feedback resource, the first terminal device determines that the side data transmission has failed; or,

If the first terminal device receives a NACK on the second feedback resource, the first terminal device determines that the side data transmission fails; or,

If the first terminal device does not receive an ACK on the first feedback resource and receives a NACK on the second feedback resource, the first terminal device determines that the side data transmission has failed.
The method according to any one of claims 1 to 3, wherein the method further comprises:

If the first terminal device receives an ACK on the first feedback resource, and the received power of the ACK is greater than or equal to a first threshold, the first terminal device determines that the transmission of the side data is successful, Otherwise, it is determined that the transmission of the side data has failed; or,

If the first terminal device receives a NACK on the second feedback resource and the received power of the NACK is greater than or equal to a second threshold, the first terminal device determines that the transmission of the side data has failed, Otherwise, it is determined that the transmission of the side data is successful; or,

If the first terminal device receives an ACK on the first feedback resource and receives a NACK on the second feedback resource, the first terminal device uses the received power of the ACK and the NACK The received power, determine whether the side data transmission is successful or the side data transmission fails.
The method according to claim 4, wherein the first terminal device determines whether the side data transmission is successful or the side data transmission fails according to the ACK received power and the NACK received power ,include:

If the received power of the ACK is greater than or equal to the first threshold and the received power of the NACK is less than or equal to the second threshold, the first terminal device determines that the side data transmission is successful; or,

If the received power of the ACK is less than or equal to the first threshold and the received power of the NACK is greater than or equal to the second threshold, the first terminal device determines that the side data transmission fails; or,

If the received power of the ACK is greater than or equal to the first threshold and the received power of the NACK is greater than or equal to the second threshold, the first terminal device determines that the side data transmission is successful or the side line Data transmission failed; or,

If the received power of the ACK is less than or equal to the first threshold, and the received power of the NACK is less than or equal to the second threshold, the first terminal device determines that the side data transmission is successful or the side line Data transfer failed.
The method according to claim 4, wherein the first terminal device determines whether the side data transmission is successful or the side data transmission fails according to the ACK received power and the NACK received power ,include:

If the received power of the ACK is greater than the received power of the NACK, the first terminal device determines that the side data transmission is successful; or,

If the received power of the ACK is less than the received power of the NACK, the first terminal device determines that the side data transmission fails; or,

If the received power of the ACK is equal to the received power of the NACK, the first terminal device determines that the side data transmission is successful or the side data transmission fails.
The method according to any one of claims 2 to 6, wherein the method further comprises:

If the first terminal device determines that the transmission of the side data fails, the first terminal device starts retransmission of the side data.
The method according to any one of claims 1 to 7, wherein the first terminal device receives, on the first feedback resource, a positive acknowledgement ACK sent by at least one second terminal device of the N terminal devices ,include:

The first terminal device receives, on the first feedback resource, at least one of the N terminal devices through at least one of a side control channel, a side data channel, or a side feedback channel ACK; and/or,

The first terminal device receiving, on the second feedback resource, a negative acknowledgement NACK sent by at least one third terminal device of the N terminal devices, includes:

The first terminal device receives on the second feedback resource that at least one third terminal device of the N terminal devices sends via the at least one of a side control channel, a side data channel, or a side feedback channel NACK.
The method according to any one of claims 1 to 8, wherein the first feedback resource and/or the second feedback resource are resources configured by a network device; or, the first feedback resource and/or Or the second feedback resource is a resource in the resource pool.
A communication method, characterized in that it includes:

The second terminal device receives the side data sent by the first terminal device;

If the side data received by the second terminal device is correct, the second terminal device sends a positive acknowledgement ACK on the first feedback resource, the first feedback resource is allocated to N terminal devices for feedback ACK Resources, the N is an integer greater than or equal to 2; or,

If the side data received by the second terminal device is wrong, the second terminal device sends a negative acknowledgement NACK on the second feedback resource, and the second feedback resource is allocated to the N terminal devices for feedback NACK resources. The N terminal devices include the second terminal device.
The method according to claim 10, wherein the second terminal device sending a positive acknowledgement ACK on the first feedback resource includes:

The second terminal device sends the ACK on the first feedback resource through at least one of a side control channel, a side data channel, or a side feedback channel;

The second terminal device sending a negative determination NACK on the second feedback resource includes:

The second terminal device sends the NACK on the second feedback resource through at least one of a side control channel, a side data channel, or a side feedback channel.
The method according to claim 10 or 11, wherein the first feedback resource and/or the second feedback resource are resources configured by a network device; or, the first feedback resource and/or the The second feedback resource is the resource in the resource pool.
A communication method, characterized in that it includes:

The first terminal device sends side data to N terminal devices, where N is an integer greater than or equal to 2;

The first terminal device receives first confirmation information on the first feedback resource;

The first feedback resource is a resource allocated to the N terminal devices for feeding back first confirmation information, the first confirmation information is a positive confirmation ACK, or the first confirmation information is a negative confirmation NACK.
The method of claim 13, wherein the first confirmation information is ACK, and the method further comprises:

The first terminal device determines the received power of the ACK;

If the received power of the ACK is greater than or equal to the first threshold, the first terminal device determines that the transmission of the side data is successful; otherwise, the first terminal device determines that the transmission of the side data fails.
The method according to claim 13 or 14, wherein the first confirmation information is NACK, and the method further comprises:

The first terminal device determines the received power of the NACK;

If the received power of the NACK is greater than or equal to the second threshold, the first terminal device determines that the transmission of the side data fails, otherwise, the first terminal device determines that the transmission of the side data is successful.
The method according to claim 14 or 15, wherein the method further comprises:

If the first terminal device determines that the transmission of the side data fails, the first terminal device starts retransmission of the side data.
The method according to any one of claims 13 to 16, wherein the first terminal device receiving the first confirmation information on the first feedback resource includes:

The first terminal device receives on a first feedback resource that the at least one second terminal device of the N terminal devices sends the at least one of the side terminal control channel, the side data channel, or the side feedback channel. The first confirmation message.
The method according to any one of claims 13 to 17, wherein the first feedback resource is a resource configured by a network device; or, the first feedback resource is a resource in a resource pool.
A communication method, characterized in that it includes:

The second terminal device receives the side data sent by the first terminal device;

The second terminal device sends first confirmation information on the first feedback resource according to whether the side data is received correctly or incorrectly, and the first feedback resource is allocated to N terminal devices for feeding back the first confirmation information Resources, the first confirmation information is a positive confirmation ACK, or the first confirmation information is a negative confirmation NACK, the N terminal devices include the second terminal device, and the N is greater than or equal to 2. Integer.
The method according to claim 19, wherein the first confirmation information is ACK, and the second terminal device sends the first feedback resource on the first feedback resource according to whether the side data is received correctly or incorrectly. 1. Confirmation information, including:

If the side data received by the second terminal device is correct, the second terminal device sends an ACK on the first feedback resource.
The method according to claim 19 or 20, wherein the first confirmation information is NACK, and the second terminal device uses the first feedback resource according to whether the side data is received correctly or incorrectly. Send the first confirmation message, including:

If the side data received by the second terminal device is wrong, the first terminal device sends a NACK on the first feedback resource.
The method according to any one of claims 19 to 21, wherein the second terminal device sending the first confirmation information on the first feedback resource includes:

The second terminal device sends the first confirmation information on at least one of a side control channel, a side data channel, or a side feedback channel on the first feedback resource.
The method according to any one of claims 19 to 22, wherein the first feedback resource is a resource configured by a network device; or, the first feedback resource is a resource in a resource pool.
A communication device, characterized in that it includes a processor and a memory;

The memory stores computer instructions;

The processor is used to execute computer instructions stored in the memory, so that the communication device implements the method according to any one of claims 1 to 23.
A computer-readable storage medium, characterized in that the storage medium stores computer instructions, and when the computer instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 23. .
A computer program product, characterized in that the computer program product includes computer instructions, and when the computer instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 23.