WO2020156407A1

WO2020156407A1 - Sidelink communication method and apparatus

Info

Publication number: WO2020156407A1
Application number: PCT/CN2020/073700
Authority: WO
Inventors: 黄海宁; 杨帆; 张兴炜; 黎超; 刘哲
Original assignee: 华为技术有限公司
Priority date: 2019-02-02
Filing date: 2020-01-22
Publication date: 2020-08-06
Also published as: CN111525987A; CN111525987B

Abstract

A sidelink communication method and apparatus, capable of being applied to the field of device-to-device (D2D) or Internet of vehicles, and the like. The method comprises: when a first terminal and a second terminal perform data transmission by means of a sidelink, an error occurs when a network device receives the acknowledgement information of the sidelink transmitted by the second terminal, and the signal quality of an uplink between the first terminal and the network device is greater than or equal to a first signal quality threshold, the first terminal receives first information from the network device, wherein the first information is used for indicating the first terminal to transmit the acknowledgement information of the sidelink to the network device; and the first terminal transmits the acknowledgement information of the sidelink to the network device. The network device can flexibly configure the terminal that transmits the acknowledgement information of the sidelink to the network device, and ensures the normal communication of the sidelink.

Description

Side link communication method and device

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China on February 2, 2019, the application number is 201910106426.8, and the invention title is "a side link communication method and device", the entire content of which is by reference Incorporated in this application.

Technical field

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

Background technique

In the new generation of wireless (new radio) vehicle-to-everything (V2X) vehicle-to-everything (V2X) wireless communication technology, both the sender and receiver adopt hybrid automatic repeat request (HARQ) technology to ensure the correctness of data transmission. That is, if the receiver successfully receives the data, it will give a correct response (acknowledgement, ACK) to the sender, and if the receiver fails to receive the data, it will give a non-acknowledgement (NACK) to the sender. Among them, V2X can also be called side link communication.

Among them, the resource allocation of sidelink communication has two modes, mode 1 and mode 2. In mode 1, the base station allocates resources for the terminal equipment of sidelink communication; in mode 2, the side link communication The terminal equipment of link communication obtains resources autonomously in the resource pool.

In addition, NR V2X introduces unicast and multicast transmission. In order to improve the reliability of data transmission, HARQ technology must be introduced in unicast and multicast. Since the resources used by the terminal equipment of the side link in mode 1 are all allocated by the base station, the feedback resources of the side link are also allocated by the base station.

As shown in FIG. 1a, in the prior art 1, the side-link transmission terminal sends the side-link HARQ information to the base station, which triggers the base station to allocate retransmission resources. The base station determines whether to allocate side uplink retransmission resources to the transmitting terminal according to the HARQ information. The HARQ information may be carried by the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) in the NR. However, letting the sending terminal of the side link feed back the HARQ information of the sidelink to the base station will cause additional delay compared to letting the receiving terminal of the side link feed back the HARQ information of the sielink to the base station.

As shown in FIG. 1b, in the second prior art, the receiving terminal of the side link feeds back the HARQ information of the sidelink to the base station. However, if the receiving terminal leaves the network coverage or is in an inactive/idle state, the receiving terminal cannot feed back HARQ information to the base station.

As shown in FIG. 1c, in the third prior art, after the receiving terminal generates HARQ information, it feeds back the HARQ information of the side uplink to the transmitting terminal and the base station respectively. At this time, the base station needs to allocate two feedback resources: one is the resource used by the receiving terminal to feed back to the sending terminal, and the other is the resource used by the receiving terminal to feed back to the base station. If the receiving terminal is within the network coverage, there is no need to feed back HARQ information to the sending terminal; if the receiving terminal is not within the network coverage, it cannot feed back HARQ information to the base station.

As shown in Figure 1d, unlike the previous three technologies, the receiving terminal and the sending terminal do not feed back the HARQ information of the sidelink to the base station, but the sending terminal requests retransmission resources from the base station by re-requesting resources, that is, retransmission resources are required. Then make the resource request again. However, both the initial transmission and the retransmission are processes of requesting resources, which increase the delay.

It can be seen from the above that whether the sending terminal feeds back HARQ to the base station or the receiving terminal feeds back HARQ to the base station, each has its own advantages and disadvantages, and it is impossible to flexibly configure who will feed back HARQ information.

Summary of the invention

The present application provides a side-link communication method and device to flexibly configure a terminal that sends response information of the side-link to ensure normal communication on the side-link.

In a first aspect, a side-link communication method is provided, including: when a first terminal and a second terminal perform data transmission through the side-link, when the network device receives the side-link sent by the second terminal When an error occurs in the response information of the first terminal and the uplink signal quality between the first terminal and the network device is greater than or equal to the first signal quality threshold, the first terminal receives the first signal from the network device Information, the first information is used to instruct the first terminal to send sidelink response information to the network device; the first terminal sends the sidelink response information to the network device Or when the first terminal is a sending terminal, and the network device receives an error in the sidelink response information sent by the second terminal, and the uplink between the first terminal and the network device When the signal quality of the channel signal is less than or equal to the second signal quality threshold, the first terminal receives second information from the network device, and the second information is used to instruct the first terminal to change the transmission mode without feedback. The data repeated transmission mode of the response information of the side link.

In this aspect, when a network device receives an error in the response information of a terminal on the side link, and when the uplink signal quality between another terminal on the side link and the network device is good, The other terminal sends the response information of the side link, so that the terminal sending the side link can be flexibly configured to ensure normal communication on the side link.

In a possible implementation manner, the situation that the network device receives the side link response information sent by the second terminal incorrectly includes: the network device cannot receive the side link sent by the second terminal Or the network device receives the error response information NACK sent by the second terminal exceeds the threshold of the number of times.

In another possible implementation manner, the second information includes the number of repeated data transmissions.

In a second aspect, a side link communication method is provided, which includes: when a first terminal and a second terminal perform data transmission through the side link, a network device receives the side link information sent by the second terminal In the case of an error in the response information, the second terminal receives third information from the network device, and the third information is used to instruct to disable the second terminal to send the side chain to the network device Road response information.

In a possible implementation manner, the method further includes: the second terminal sends a sounding reference signal to the network device, the network device measures the sounding reference signal, and the obtained second terminal and the The uplink signal quality value between the network devices is less than or equal to the third signal quality threshold, the network device cannot receive the side link response information sent by the second terminal, and the network device receives the side link response information sent by the second terminal. When the response information of the side link is wrong.

In another possible implementation manner, the method further includes: the second terminal sends the error response information NACK to the network device exceeds the threshold of the number of times, and the network device receives the sidewalk chain sent by the second terminal If there is an error in the response information of the road.

In another possible implementation manner, the second terminal is a sending terminal, and the second terminal receiving the third information from the network device includes any one of the following operations: The downlink control information of the network device used for the side link, the downlink control information used for the side link does not include the side link feedback resource, and does not include the response information used to feed back the side link Uplink feedback resources; or the second terminal receives downlink control information for the side link from the network device, where the downlink control information for the side link is used to instruct to disable the The second terminal sends the response information of the side link to the network device.

In another possible implementation manner, before the second terminal receives the third information from the network device, the method further includes: the second terminal receives fourth information from the network device, so The fourth information is used to configure the second terminal to send the side link response information to the network device.

In another possible implementation manner, the fourth information includes any one of the following: high-level parameters, medium access control layer messages, main information blocks, and downlink control information for side links.

In another possible implementation manner, the method further includes: the second terminal receives one or more resources and information from the network device, and the one or more resources include: data resources, side rows Link feedback resource, uplink feedback resource used to feed back response information of the side link, the one or more pieces of information include: feedback timing of the side link feedback resource, and the side link feedback The first time interval information between the resource and the uplink feedback resource for feeding back the response information of the side uplink, the data resource and the uplink for feeding back the response information of the side uplink Feedback the second time interval information between resources; and the second terminal sends the side link response information to the first terminal according to the one or more resources and information.

In this implementation manner, the first time interval information and/or the second time interval information are dynamically configured or semi-statically configured or pre-configured according to the delay, reliability, and priority of data sent by the second terminal.

In another possible implementation manner, the side link feedback resource and the uplink feedback resource used for feeding back the response information of the side link are resources in the same or different resource sets. The resource set is configured by a high-level.

In a third aspect, a side-link communication method is provided, including: when a first terminal and a second terminal perform data transmission through the side-link, a network device determines to receive the side-link sent by the second terminal When the response information of the first terminal is incorrect; when the uplink signal quality between the first terminal and the network device is greater than or equal to the first signal quality threshold, the network device sends the first terminal to the first terminal. Information, the first information is used to instruct the first terminal to send sidelink response information to the network device; the network device receives the sidelink response information from the first terminal Or when the uplink signal quality between the first terminal and the network device is less than or equal to the second signal quality threshold, the network device sends second information to the first terminal, the second information It is used to instruct the first terminal to change the transmission mode to a data repeated transmission mode that does not need to feed back the response information of the side link.

In a possible implementation manner, the situation in which the network device determines that an error occurs in receiving the response information of the side link sent by the second terminal includes: the network device receives a sounding reference from the second terminal Signal; the network device measures the sounding reference signal to obtain the uplink signal quality value between the second terminal and the network device; and when the uplink signal between the second terminal and the network device When the link signal quality value is less than or equal to the third signal quality threshold, the network device determines that an error occurs when receiving the response information of the side link sent by the second terminal.

In another possible implementation manner, the situation in which the network device determines that an error occurs in receiving the response information of the side link sent by the second terminal includes: when the network device cannot receive the response information from the second terminal When receiving the response information of the side link of the terminal, the network device determines that an error occurs when receiving the response information of the side link sent by the second terminal.

In another possible implementation manner, the method further includes: the network device sends third information to the second terminal, where the third information is used to instruct to disable the second terminal to the The network device sends the response information of the side link.

In a fourth aspect, a side link communication method is provided, which includes: when a first terminal receives error response information from a second terminal, the first terminal uses a pre-configured resource for periodically requesting retransmission Sending a first request to a network device, where the first request is used to request retransmission resources, the first request includes a hybrid automatic repeat HARQ process number; the first terminal receives the retransmission resources from the network device, The retransmission resource corresponds to the HARQ process number; and the first terminal retransmits data to the second terminal on the retransmission resource.

In this aspect, the pre-configured resource for periodic retransmission is used for resource request, and the side-link terminal does not need to send the side-link response information to the network device to avoid the impact on the uplink.

In a fifth aspect, a side link communication method is provided, including: a network device detects a first request from a first terminal on a pre-configured resource for periodically requesting retransmission, and the first request is used to request retransmission. Transmission resources, the first request includes a hybrid automatic retransmission HARQ process ID; the network device allocates retransmission resources according to the HARQ process ID; and the network device sends the retransmission resource to the first terminal.

In a sixth aspect, a communication device is provided, which can implement the communication method in any possible implementation manner of the first aspect, the second aspect, the fourth aspect, or the foregoing aspects. For example, the communication device may be a chip (such as a communication chip, etc.) or a terminal device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

In a possible implementation manner, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform corresponding functions in the above-mentioned communication method. The memory is used for coupling with the processor, and it stores necessary programs (instructions) and/or data of the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements.

In another possible implementation manner, the communication device may include a unit or module that performs corresponding actions in the foregoing method.

In another possible implementation manner, a processor and a transceiver device are included. The processor is coupled to the transceiver device, and the processor is used to execute a computer program or instruction to control the transceiver device to receive and receive information. Send; when the processor executes the computer program or instruction, the processor is also used to implement the above method. Wherein, the transceiver device may be a transceiver, a transceiver circuit or an input/output interface. When the communication device is a chip, the transceiving device is a transceiving circuit or an input/output interface.

In yet another possible implementation manner, the structure of the communication device includes a processor; the processor is configured to support the device to perform corresponding functions in the foregoing communication method.

In yet another possible implementation manner, the structure of the communication device includes a processor, and the processor is configured to couple with a memory, read instructions in the memory, and implement the foregoing method according to the instructions.

In yet another possible implementation manner, the structure of the communication device includes a transceiver for implementing the foregoing communication method.

When the communication device is a chip, the transceiver unit may be an input/output unit, such as an input/output circuit or a communication interface. When the communication device is a user equipment, the transceiver unit may be a transmitter/receiver or a transmitter/receiver.

In a seventh aspect, a communication device is provided, which can implement the communication method in any of the foregoing third aspect, fifth aspect, or any of the foregoing aspects. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a network device, and the foregoing method may be implemented by software, hardware, or execution of corresponding software by hardware.

In a possible implementation manner, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform corresponding functions in the above-mentioned communication method. The memory is used to couple with the processor, and it stores the necessary programs (instructions) and data of the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements.

In another possible implementation manner, the communication device may include unit modules that perform corresponding actions in the foregoing method.

When the communication device is a chip, the transceiver unit may be an input/output unit, such as an input/output circuit or a communication interface. When the communication device is a network device, the transceiver unit may be a transmitter/receiver (also called a transmitter/receiver).

In an eighth aspect, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed, the method described in each of the foregoing aspects is implemented.

In a ninth aspect, a computer program product containing instructions is provided. When the instructions are executed on a computer, the computer executes the methods described in the foregoing aspects.

In a tenth aspect, a communication system is provided, including the communication devices in the above aspects.

Description of the drawings

FIG. 1a is a schematic flowchart of a side link communication method provided by prior art 1;

FIG. 1b is a schematic flowchart of a side link communication method provided by prior art 2;

FIG. 1c is a schematic flowchart of a side link communication method provided by prior art 3;

FIG. 1d is a schematic flowchart of a side link communication method provided by prior art four;

FIG. 2 is a schematic diagram of a communication system provided by an embodiment of this application;

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

4 is a schematic flowchart of another side link communication method provided by an embodiment of the application;

FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 6 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a simplified terminal device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of a simplified network device provided by an embodiment of this application.

detailed description

The embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.

Figure 2 shows a schematic diagram of a communication system involved in this application. The communication system may include at least one network device 100 (only one is shown) and a sending terminal 201 and a receiving terminal 202 that perform uplink/downlink communication with the network device 100. The transmitting terminal 201 and the receiving terminal 202 perform side-link communication.

Among them, the side link communication can include unicast communication, multicast communication and broadcast communication. This application applies to unicast communication and also applies to multicast communication. Among them, unicast communication refers to one sending terminal sending data to one receiving terminal. Multicast communication refers to one sending terminal sending data to multiple receiving terminals. Broadcast communication refers to a sending terminal sending data to all terminals, and any terminal can be used as a receiving terminal to receive data. For the convenience of description, the description of the following embodiments takes unicast communication as an example, and the implementation method of multicast communication can refer to unicast communication.

The network device 100 may be a device capable of communicating with a receiving terminal/sending terminal. The network device 100 may be any device with a wireless transceiver function. Including but not limited to: base stations (NodeB), evolved base stations (eNodeB), base stations in the fifth generation (5G) communication system, base stations or network equipment in future communication systems, and connections in Wi-Fi systems Ingress node, wireless relay node, wireless backhaul node, etc. The network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device 100 may also be a small station, a transmission reference point (TRP), etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.

The sending terminal 201 and the receiving terminal 202 are devices with a wireless transceiver function and can be deployed in a vehicle. The sending terminal 201 and the receiving terminal 202 can be mobile phones, tablets, computers with wireless transceiver functions, wireless terminals in self-driving, and wireless terminals in transportation safety. Terminal etc. Terminal equipment can sometimes be referred to as user equipment (UE), access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, terminal, wireless communication equipment, UE Agent or UE device, etc.

It should be noted that the terms "system" and "network" in the embodiments of the present invention can be used interchangeably. "Multiple" refers to two or more than two. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present invention. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

FIG. 3 is a schematic flowchart of a side link communication method provided by an embodiment of this application, which can be applied to the communication system shown in FIG. 2. among them:

S301. The network device sends fourth information to the second terminal.

Correspondingly, the second terminal receives the fourth information from the network device.

The fourth information is used to configure the second terminal to send the response information of the side link to the network device.

In this embodiment, the network device may initially configure the sending terminal to send the response information of the side link, that is, the second terminal here is the sending terminal; the network device may also initially configure the receiving terminal to send the response information of the side link, namely The second terminal here is the receiving terminal. In this embodiment, the response information of the side link may be SL HARQ information. SL HARQ information can be based on transport block (TB) or code block group (CBG). Whether to enable HARQ feedback based on code block group (CBG) can be configured by the network device, or configured by the sending terminal, or It can be configured by the receiving terminal, and can also be implicitly associated with the resource pool used by SL HARQ.

In an implementation manner, the network device sends radio resource control (radio resource control, RRC) signaling to the second terminal. The RRC signaling is used to configure the second terminal to send sidelink response information to the network device. The device configures the second terminal as the sending terminal or the receiving terminal to feed back the HARQ information of the side link to the network device through the RRC layer. Specifically, the RRC layer configures the user equipment-specific (UE-specific) high-level parameter SL-HARQ-feedback-TX or SL-HARQ-feedback-RX. For example, if the configuration parameter SL-HARQ-feedback-TX is in the enabled state, the second terminal will serve as the transmitting terminal to feed back the HARQ information of the side link to the network device. If the configuration parameter is disabled (disable ), the network device does not support the sending terminal to feed back SL HARQ information to it.

In another implementation manner, the network device may also send a media access control (MAC) message or a master information block (MIB) message of a system message to the second terminal, and the MAC message or MIB message is used To instruct the second terminal to send sidelink response information to the network device. For example, the MAC layer or 1 bit is carried in the MIB message to indicate whether to enable the second terminal as a sending terminal to feed back the HARQ information of the side link to the network device, or the MAC layer or 1 bit is carried in the MIB message to indicate Whether to enable the second terminal as the receiving terminal to feed back the HARQ information of the side link to the network device.

In another implementation manner, the network device adds 1 bit to the downlink control information for sidelink (SL-DCI) used for the side link to indicate whether to enable the sending terminal to feed back the side link to the network device. Channel HARQ information, or the network device adds 1 bit to the SL-DCI to indicate whether to enable the receiving terminal to feed back the HARQ information of the side link to the network device.

S302. The network device sends one or more resources and information.

The one or more resources include: data resources, side link feedback resources, and uplink feedback resources used to feed back response information of the side links.

The one or more pieces of information include: the feedback timing of the side link feedback resource, the first time between the side link feedback resource and the uplink feedback resource used to feed back the response information of the side link Interval information, second time interval information between the data resource and the uplink feedback resource used for feeding back the response information of the side uplink.

In yet another implementation manner, the one or more pieces of information may further include the feedback timing of the side link feedback resource, the side link feedback resource and the uplink used to feed back the response information of the side link First time interval information between channel feedback resources, second time interval information between the data resource and the uplink feedback resource used for feeding back side link response information, feedback granularity enabling information, Specifically, the enabling/disabling information of HARQ information is generated based on the code block group (CBG), and the feedback granularity information may be the generation of HARQ information based on the transport block (TB) or the generation of HARQ information based on the code block group (CBG).

When the second terminal is a sending terminal, the sending terminal receives data resources from the network device, side link feedback resources, uplink feedback resources used to feed back side link response information, and side link feedback resources. Feedback timing and the above-mentioned first time interval information, and forward the side link feedback resource and side link feedback timing to the receiving terminal. The sending terminal may determine the feedback timing of the uplink feedback resource for feeding back the response information of the side link according to the feedback timing of the side link feedback resource and the first time interval information.

Alternatively, when the second terminal is the receiving terminal, the network device configures the receiving terminal with data resources, uplink feedback resources for feeding back the response information of the side link, and the above-mentioned second time interval information, and the second terminal receives The above resources and information. The receiving terminal can determine the feedback timing of the uplink feedback resource for feeding back the response information of the side uplink based on the timing information of the data resource and the second time interval information.

Wherein, the side link feedback resource refers to the time domain and/or frequency domain resources used by the receiving terminal to feed back SL HARQ information to the transmitting terminal. The side link feedback timing is used to instruct the receiving terminal to feed back the time information of SL HARQ information to the transmitting terminal. Specifically, the side link feedback timing is the time interval between the side link resource and the side link feedback resource; the uplink feedback resource used to feed back the response information of the side link refers to the receiving terminal/transmitting The terminal feeds back the time domain and/or frequency domain resources of the response information of the side link to the network device. The uplink feedback timing used to feed back the response information of the side uplink refers to the time information for the receiving terminal/sending terminal to feed back the response information of the side uplink to the network device, specifically, used to feed back the response of the side uplink The information uplink feedback timing refers to the time interval between the side link resource and the uplink feedback resource for feeding back the response information of the side link.

As shown in FIG. 1d, when the sending terminal has a data transmission requirement, it sends resource request information (for example, a scheduling request (SR)) to the network device on the resource used for transmitting the side link resource request information. After receiving the resource request information, the network device allocates resources for transmitting a buffer status report (BSR). The network equipment judges the resource allocation mode, including whether to allocate side links, based on the data buffer volume in the BSR, service priority, service delay requirements, service reliability requirements, service types (unicast/multicast/broadcast) and other information Feedback resources, whether to repeat data transmission, etc.

Among them, SL HARQ information can be carried by the uplink control channel dedicated to carrying SL HARQ, or can be carried by the physical uplink control channel (PUCCH) defined in NR Rel-15 or the physical uplink shared channel (PUSCH) ) Bearing. Assuming the PUCCH bearer is used, the PUCCH format defined in NR Rel-15 or the new PUCCH format can be used. The PUCCH resource used may share the same PUCCH resource set with the PUCCH resource in NR Rel-15; or it may come from a PUCCH resource set dedicated to bear SL HARQ. That is, the network equipment configures 3 types of PUCCH resource sets: PUCCH resource sets for Uu HARQ (uplink HARQ information), PUCCH resource sets for SL HARQ (SL HARQ information), and PUCCH resources for U HARQ and SL HARQ Collection (including Uu HARQ and SL HARQ sharing a PUCCH resource set or a PUCCH resource set used after U HARQ and SL HARQ are multiplexed). Among them, if the network equipment allocates both PUCCH carrying SL HARQ and PUCCH carrying Uu HARQ in one uplink time slot, then PUCCH of SL HARQ and PUCCH of Uu HARQ need to use different PUCCH resources for the network equipment to distinguish; Or, one bit is added to SL HARQ and U HARQ respectively to distinguish between SL HARQ and U HARQ. Assuming that the PUCCH resources of SL HARQ and Uu HARQ conflict, the UE will give up sending SL HARQ or U HARQ according to the service priority (including information such as delay requirements and reliability requirements), or reselect a new PUCCH resource, and set SL HARQ and Uu HARQ are multiplexed and sent together, where SL HARQ is always placed after U HARQ. If the PUCCH resource of SL HARQ conflicts with the PUSCH resource, SL HARQ is multiplexed in PUSCH, and SL HARQ is always placed after U HARQ.

Wherein, the uplink feedback resource used to feed back the response information of the side uplink refers to the resource used to feed back the SLHARQ information to the network device. The time interval information is dynamically configured or semi-statically configured or pre-configured or fixed according to the delay, reliability, and priority of data sent by the second terminal. The time interval may be a slot level, a half-slot level, or an orthogonal frequency division multiplexing (OFDM) symbol level. As the terminal that feeds back HARQ information, the second terminal needs to obtain the time interval information.

S303. The first terminal sends data to the second terminal.

Correspondingly, the second terminal receives the data.

Assuming that the network device initially configures the receiving terminal to send the HARQ information of the side link, the second terminal here is the receiving terminal. When the first terminal (that is, the sending terminal) needs to send data, it is assumed that the network device configures the side link transmission resource for the first terminal. The first terminal sends data to the second terminal on the side link transmission resource. The second terminal receives the data.

Assuming that the network device initially configures the sending terminal to send the HARQ information of the side link, the second terminal here is the sending terminal. Then S303 can be replaced with: the second terminal sends data to the first terminal. The first terminal receives the data.

S304. The second terminal sends response information of the side link according to the one or more resources and information.

Correspondingly, as shown in FIG. 3, when the second terminal is a receiving terminal, the second terminal generates SL HARQ information according to the result of decoding the data. The second terminal sends SL HARQ information to the first terminal, and the first terminal receives the SL HARQ information and forwards it to the network device. The network device receives the SL HARQ information.

Alternatively, the second terminal may also be a sending terminal, and the second terminal receives the SL HARQ information from the first terminal and forwards it to the network device.

Specifically, if the HARQ information is correct response (acknowledgement, ACK) information, the second terminal feeds back ACK information; if the HARQ information is wrong response information/negative acknowledgement (NACK) information, or discontinuous transmission (discontinuous transmission, DTX), the second terminal feeds back NACK information.

Among them, the above S301 to S304 are optional steps.

S305. The network device determines that an error occurs when receiving the response information of the side link sent by the second terminal.

During the communication process, the communication conditions of the uplink and the side link may change. If the network device cannot receive the side link response information sent by the second terminal, or the network device receives the wrong response information/negative acknowledgement (NACK) information sent by the second terminal over the number of times Threshold, it can be determined that an error has occurred in receiving the SL HARQ information sent by the second terminal.

In an implementation manner, the network device triggers the second terminal to send a sounding reference signal (SRS), the network device receives the SRS from the second terminal, and the network device measures the sounding reference signal to obtain the The uplink signal quality value between the second terminal and the network device, when the uplink signal quality value between the second terminal and the network device is less than or equal to the third signal quality threshold, the network device The side link response information sent by the second terminal cannot be received, and the network device determines that an error occurs when receiving the side link response information sent by the second terminal.

In another implementation manner, the network device initially configures the second terminal to feed back SL HARQ information to it. If the network device receives NACKs exceeding the threshold, it indicates that the uplink signal quality between the second terminal and the network device is poor, or The quality of the side link between the first terminal and the second terminal is poor. Therefore, the network device can determine that an error has occurred in receiving the SL HARQ information sent by the second terminal.

S306: When the uplink signal quality between the first terminal and the network device is greater than or equal to a first signal quality threshold, the network device sends first information to the first terminal.

Correspondingly, the first terminal receives the first information.

Wherein, the first information is used to instruct the first terminal to send sidelink response information to the network device.

According to step S306, the network device has determined that an error has occurred in receiving the SL HARQ information sent by the second terminal, and the network device detects the quality of the uplink signal with the first terminal. If the uplink signal quality between the first terminal and the network device is greater than or equal to the first signal quality threshold, the network device instructs the first terminal to send SL HARQ information to the network device.

Specifically, 1 bit may be added to the SL-DCI to instruct the first terminal to send SL HARQ information to the network device.

Or S306', when the uplink signal quality between the first terminal and the network device is less than or equal to the second signal quality threshold, the network device sends the second information to the first terminal.

Correspondingly, the first terminal receives the second information.

Wherein, the second information is used to instruct the first terminal to change the transmission mode to a data repeated transmission mode that does not need to feed back response information of the side link.

If the quality of the uplink signal between the first terminal and the network device is less than or equal to the second signal quality threshold, indicating that the quality of the uplink signal between the network device and the first terminal is poor, the first terminal stops reporting to the network device Feed back SLHARQ information to end the data transmission process, or the network device instructs the first terminal not to feed back SLHARQ to it and at the same time instructs the first terminal to change the transmission mode to a data repetitive transmission mode that does not require HARQ feedback, and can dynamically indicate data repetition The number of transmissions can also be the number of repeated transmissions of data matched according to the delay and reliability requirements. The number of repeated data transmissions can come from a predetermined set or a set configured by higher layers. Wherein, the second signal quality threshold is less than the first signal quality threshold.

As another alternative implementation of S306', the second information may be SL-DCI, that is, when the network device receives more than N NACKs sent by the second terminal, the network device schedules retransmissions for N+1 times. In the case of resources, the SL HARQ information feedback resource is not allocated in the SL-DCI, and the SL HARQ information feedback is implicitly indicated to be disabled.

As another alternative implementation of S306', the second information may be SL-DCI, and the SL-DCI includes indication information, and the indication information is used to indicate that the SL HARQ information is disabled to feedback.

In yet another implementation manner, the second information may be information for the network device to configure retransmission resources. Specifically, the network device schedules the retransmission resources in a resource pool different from the resource pool used in the previous transmission to avoid the previous transmission. Data retransmission caused by serious congestion in the resource pool used for transmission.

S307: The network device sends third information to the second terminal.

Correspondingly, the second terminal receives the third information.

Wherein, the third information is used to instruct to disable the second terminal to send the response information of the side link to the network device.

It should be noted that the order of execution of step S307 and step S306 is not limited, that is, the network device may first instruct the first terminal to send SL HARQ information, or first disable the second terminal to send SL HARQ information to the network device.

Specifically, the network device may add 1 bit to the SL-DCI, which is used to instruct to disable the second terminal to send SL HARQ information to the network device.

S308. The first terminal sends response information of the side link to the network device.

Correspondingly, the network device receives the response information of the side link from the first terminal.

Correspondingly, in yet another implementation manner, the network device receives the response information of the side link from the first terminal, and performs retransmission resource scheduling according to the response information of the side link. According to the different feedback granularity, the allocation of retransmission resources by the network device is different. Specifically, when the feedback granularity is a code block group (CBG), the first terminal successfully decodes all code blocks in a code block group, then Generate ACK, and generate NACK if at least one code block in the code block group is decoded incorrectly. The network device only retransmits the code block group with a decoding error, that is, the network device only needs to schedule retransmission resources for the code block group with a decoding error, which improves the utilization efficiency of the spectrum.

Optionally, the first terminal can be carried by an uplink control channel dedicated to carrying SL HARQ, or it can be carried by PUCCH defined in NR Rel-15.

Optionally, when the first terminal receives the SL HARQ information sent by the second terminal, the SL HARQ information may be carried in the MAC CE or physical uplink shared channel (physical uplink shared channel, PUSCH), and the HARQ process number may be carried by the destination terminal. Identification number. The network device determines whether it needs to allocate retransmission resources based on this information.

Optionally, the first terminal receives the SL HARQ information sent by the second terminal, and may also carry SL HARQ information in the PUSCH, and carry 1 bit to indicate whether to carry SL HARQ information, and carry the identification number of the target terminal, or Side link identification number to distinguish different side link terminals.

According to a side link communication method provided by an embodiment of the present application, when a network device receives an error in the response information of a terminal on the side link, and the other terminal on the side link and the network device When the quality of the uplink signal is good, the other terminal sends the side-link response information, so that the terminal sending the side-link can be flexibly configured to ensure normal communication on the side-link.

FIG. 4 is a schematic flowchart of another side link communication method provided by an embodiment of this application, which can be applied to the communication system shown in FIG. 2. among them:

S401: The network device sends fourth information to the second terminal.

S402. The network device sends the side link feedback resource and the side link feedback timing.

S403: The first terminal sends data to the second terminal.

Correspondingly, the second terminal receives the data.

S404: The second terminal sends the side link response information to the first terminal on the side link feedback resource according to the side link feedback timing.

Correspondingly, the first terminal receives the response information.

Among them, the above S401 to S404 are optional steps. The implementation of steps S401 to S404 can refer to steps S301 to S304 of the embodiment shown in FIG. 3. The difference is that in S402, the network device may not allocate the uplink for feeding back the response information of the side uplink to the first terminal. Channel feedback resources, because in this embodiment, in S404, after the first terminal receives the response information of the side link sent by the second terminal, the first terminal does not feed back the response information of the side link to the network device.

In this embodiment, the first terminal is a sending terminal, and the second terminal is a receiving terminal.

S405: When the first terminal receives the error response information from the second terminal, the first terminal sends a first request to the network device on a pre-configured resource for periodically requesting retransmission.

Correspondingly, the network device receives the first request.

In this embodiment, the network device configures a dedicated resource requesting retransmission for the first terminal and the second terminal performing sidelink communication, and the period and pattern/pattern of the resource requesting retransmission are The first terminal and the second terminal are unique.

When the first terminal receives the error response information (for example, NACK) from the second terminal, the first terminal sends the first request to the network device on the pre-configured resource for periodically requesting retransmission. Wherein, the first request is used to request retransmission resources, and the first request includes the HARQ process ID.

S406: The network device allocates retransmission resources according to the HARQ process ID.

After receiving the first request, the network device knows which data packet transmission error occurred according to the HARQ process number, and the network device allocates retransmission resources to the first terminal, and the retransmission resources correspond to the HARQ process number. Optionally, the retransmission resource may be the same resource as the previous transmission.

S407. The network device sends the retransmission resource to the first terminal.

Correspondingly, the first terminal receives the retransmission resource.

S408. The first terminal retransmits data to the second terminal on the retransmission resource.

Correspondingly, the second terminal receives the retransmitted data.

The first terminal does not send error response information to the network device, and uses the pre-configured periodic request retransmission resource to make a resource request. Using the retransmission resource to retransmit the data can avoid the impact on the uplink; reducing the network device allocation BSR resources, the step of reporting the BSR buffer report by the first terminal, reduces the transmission delay.

According to a side-link communication method provided by an embodiment of the present application, a pre-configured resource for periodic retransmission is used for resource request, and the side-link terminal does not need to send side-link response information to the network device, Avoid the impact on the uplink.

The foregoing describes the method of the embodiment of the present application in detail, and the device of the embodiment of the present application is provided below.

Based on the same concept of the communication method in the foregoing embodiment, as shown in FIG. 5, an embodiment of the present application further provides a communication device 5000, which can be applied to the communication method shown in FIG. 3 or FIG. The communication device 5000 may be the sending terminal 201 or the receiving terminal 202 as shown in FIG. 2, and may also be a component (such as a chip) applied to the sending terminal 201 or the receiving terminal 202.

In an embodiment, the communication device 5000 includes a transceiver unit 51. among them:

The transceiving unit 51 is used to transmit data between the first terminal and the second terminal via the side link, when the network device receives the response information of the side link sent by the second terminal, and an error occurs. When the uplink signal quality between the first terminal and the network device is greater than or equal to the first signal quality threshold, receiving first information from the network device, the first information being used to indicate the first The terminal sends the response information of the side link to the network device; the first terminal sends the response information of the side link to the network device; or

The transceiving unit 51 is also configured to: when the first terminal is a sending terminal, the network device receives the side link response information sent by the second terminal in error, and the first terminal communicates with the network When the uplink signal quality between the devices is less than or equal to the second signal quality threshold, receiving second information from the network device, where the second information is used to instruct the first terminal to change the transmission mode without feedback The data repeated transmission mode of the response information of the side link.

In an implementation manner, the situation where an error occurs when the network device receives the side link response information sent by the second terminal includes: the network device cannot receive the side link response information sent by the second terminal , Or the network device receives the error response information NACK sent by the second terminal exceeding the threshold of the number of times.

In another implementation manner, the second information includes the number of repeated data transmissions.

A more detailed description of the foregoing transceiver unit 51 can be obtained directly by referring to the relevant description of the first terminal in the method embodiment shown in FIG. 3, and will not be repeated here.

In another embodiment, the communication device 5000 includes a transceiver unit 51. among them:

The transceiving unit 51 is configured to, when the first terminal receives the error response information from the second terminal, send a first request to the network device on a pre-configured resource for periodically requesting retransmission, and the first request is used for Requesting retransmission resources, where the first request includes a hybrid automatic retransmission HARQ process number;

The transceiving unit 51 is further configured to receive retransmission resources from the network device, where the retransmission resources correspond to the HARQ process ID; and

The transceiving unit 51 is further configured to retransmit data to the second terminal on the retransmission resource.

A more detailed description of the foregoing transceiver unit 51 can be obtained directly by referring to the relevant description of the first terminal in the foregoing method embodiment shown in FIG. 4, which is not repeated here.

It should be noted that the above-mentioned transceiver unit may be an integrated unit with a transceiver function, or it may be composed of an independent receiving unit with a receiving function and a transmitting unit with a transmitting function, logically called a "transceiving unit" .

Based on the same concept of the communication method in the foregoing embodiment, as shown in FIG. 6, an embodiment of the present application further provides a communication device 6000, which can be applied to the communication method shown in FIG. 3 or FIG. The communication device 6000 may be the sending terminal 201 or the receiving terminal 202 shown in FIG. 2, and may also be a component (such as a chip) applied to the sending terminal 201 or the receiving terminal 202. The communication device 6000 includes a transceiver unit 61. among them:

The transceiving unit 61 is used for receiving data from the second terminal when an error occurs when the network device receives the response information of the side link sent by the second terminal when the first terminal and the second terminal are transmitting data through the side link. The third information of the network device, where the third information is used to instruct to disable the second terminal to send the side link response information to the network device.

In an implementation manner, the transceiving unit 61 is further configured to send a sounding reference signal to the network device, and the network device measures the sounding reference signal, and obtains the communication between the second terminal and the network device. The uplink signal quality value is less than or equal to the third signal quality threshold, the network device cannot receive the sidelink response information sent by the second terminal, and the network device receives the sidelink signal sent by the second terminal. When the response information is wrong.

In another implementation manner, the transceiving unit 61 is further configured to send error response information NACK to the network device exceeds a threshold of times, and the network device receives the side link response information sent by the second terminal with an error Case.

In yet another implementation manner, the second terminal is a transmitting terminal, and the transceiving unit 61 is further configured to receive downlink control information for the side link from the network device, and the The downlink control information does not include side link feedback resources, and does not include uplink feedback resources used to feed back side link response information; or

The transceiving unit 61 is further configured to receive downlink control information for the side link from the network device, and the downlink control information for the side link is used to instruct to disable the second terminal to The network device sends response information of the side link.

In another implementation manner, the transceiving unit 61 is further configured to receive fourth information from the network device before receiving the third information from the network device, and the fourth information is used to configure the first information. The second terminal sends the response information of the side link to the network device.

In still another implementation manner, the fourth information includes any one of the following: high-level parameters, medium access control layer messages, main information blocks, and downlink control information for side links.

In another implementation manner, the transceiving unit 61 is further configured to receive one or more resources and information from the network device, and the one or more resources include: data resources, side link feedback resources, and In the uplink feedback resource for feeding back the response information of the side link, the one or more pieces of information include: the feedback timing of the side link feedback resource, the side link feedback resource and the The first time interval information between the uplink feedback resources for feeding back the response information of the side uplink, the first time interval information between the data resource and the uplink feedback resource for feeding back the response information of the side uplink 2. Time interval information; and the transceiver unit 61 is further configured to send the side link response information to the first terminal according to the one or more resources and information.

In yet another implementation manner, the side link feedback resource and the uplink feedback resource used for feeding back the response information of the side link are resources in the same or different resource sets.

A more detailed description of the foregoing transceiver unit 61 can be obtained directly by referring to the relevant description of the second terminal in the method embodiment shown in FIG. 3 or FIG. 4, and will not be repeated here.

Based on the same concept of the communication method in the foregoing embodiment, as shown in FIG. 7, an embodiment of the present application also provides a communication device 7000, which can be applied to the communication method shown in FIG. 3 or FIG. The communication device 7000 may be the network device 100 shown in FIG. 2 or a component (for example, a chip) applied to the network device 100.

In an embodiment, the communication device 7000 includes a processing unit 71 and a transceiver unit 72. among them:

The processing unit 71 is configured to determine that an error occurs in receiving the response information of the side link sent by the second terminal when the first terminal and the second terminal perform data transmission through the side link;

The transceiving unit 72 is configured to send first information to the first terminal when the uplink signal quality between the first terminal and the network device is greater than or equal to a first signal quality threshold. A piece of information is used to instruct the first terminal to send sidelink response information to the network device; the transceiver unit 72 is also used to receive the sidelink response information from the first terminal; or

The transceiving unit 72 is further configured to send second information to the first terminal when the uplink signal quality between the first terminal and the network device is less than or equal to a second signal quality threshold. The second information is used to instruct the first terminal to change the transmission mode to a data repeated transmission mode that does not need to feed back the response information of the side link.

In an implementation manner, the transceiving unit 72 is further configured to receive a sounding reference signal from the second terminal;

The processing unit 71 is further configured to measure the sounding reference signal to obtain an uplink signal quality value between the second terminal and the network device;

The processing unit 71 is further configured to determine to receive the side-line chain sent by the second terminal when the uplink signal quality value between the second terminal and the network device is less than or equal to a third signal quality threshold. If there is an error in the response information of the road.

In another implementation manner, the processing unit 71 is further configured to determine to receive the response information sent by the second terminal when the network device cannot receive the response information of the side link from the second terminal An error occurs in the response information of the side link.

In another implementation manner, the transceiving unit 72 is further configured to send third information to the second terminal, and the third information is used to instruct to disable the second terminal to send the network device to the network device. Response information of the side link.

More detailed descriptions of the processing unit 71 and the transceiving unit 72 can be obtained directly by referring to the relevant description of the network device in the method embodiment shown in FIG. 3, and will not be repeated here.

In another embodiment, the communication device 7000 includes a processing unit 71 and a transceiver unit 72. among them:

The processing unit 71 is configured to detect a first request from a first terminal on a pre-configured resource for periodically requesting retransmission, the first request is used to request a retransmission resource, and the first request includes hybrid automatic retransmission. Transfer HARQ process number;

The processing unit 71 is further configured to allocate retransmission resources according to the HARQ process ID; and

The transceiver unit 72 is configured to send the retransmission resource to the first terminal.

More detailed descriptions of the processing unit 71 and the transceiving unit 72 can be obtained directly by referring to the relevant description of the network device in the method embodiment shown in FIG. 4, and will not be repeated here.

An embodiment of the present application also provides a communication device, which is used to execute the above-mentioned communication method. Part or all of the above communication methods can be implemented by hardware or software.

Optionally, the communication device may be a chip or an integrated circuit in specific implementation.

Optionally, when part or all of the communication method in the foregoing embodiment is implemented by software, the communication device includes: a memory for storing a program; a processor for executing the program stored in the memory, and when the program is executed, The communication apparatus can respectively implement the communication methods provided by the first terminal, the second terminal, and the network device in the embodiment shown in FIG. 3 or FIG. 4.

Optionally, the foregoing memory may be a physically independent unit, or may be integrated with the processor. This memory can also be used to store data.

Optionally, when part or all of the communication method in the foregoing embodiment is implemented by software, the communication device may also only include a processor. The memory used to store the program is located outside the communication device, and the processor is connected to the memory through a circuit/wire for reading and executing the program stored in the memory.

The processor may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The aforementioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory) , Hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory may also include a combination of the above types of memory.

It can be understood that the units in the foregoing communication device embodiments may also be referred to as modules.

Figure 8 shows a simplified structural diagram of a terminal device. It is easy to understand and easy to illustrate. In Fig. 8, the terminal device uses a mobile phone as an example. As shown in Figure 8, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 8. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of this application, the antenna and radio frequency circuit with the transceiver function can be regarded as the receiving unit and the transmitting unit (also collectively referred to as the transceiver unit) of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device . As shown in FIG. 8, the terminal device includes a transceiver unit 81 and a processing unit 82. The transceiver unit 81 may also be referred to as a receiving/transmitting (transmitter) device, a receiving/transmitting machine, a receiving/transmitting circuit, and the like. The processing unit 82 may also be called a processor, a processing board, a processing module, a processing device, and so on. The transceiver unit 81 is used to implement the functions of the transceiver unit 51 in the embodiment shown in FIG. 5 or the transceiver unit 61 in the embodiment shown in FIG. 6.

For example, in one embodiment, the transceiving unit 81 is configured to perform the functions of the first terminal in steps S301 to S305, S307 or S307' in the embodiment shown in FIG. 3.

For example, in another embodiment, the transceiver unit 81 is configured to perform the functions of the first terminal in steps S401 to S406 and S408 to S409 in the embodiment shown in FIG. 4.

For example, in another embodiment, the transceiver unit 81 is configured to perform the functions of the second terminal in steps S301 to S305 and S308 in the embodiment shown in FIG. 3.

For example, in another embodiment, the transceiver unit 81 is configured to perform the functions of the second terminal in steps S401 to S405 and S409 in the embodiment shown in FIG. 4.

Figure 9 shows a simplified schematic diagram of a network device. The network equipment includes a radio frequency signal transceiver and conversion part and a 102 part, which in turn includes a transceiver unit 91 part. The RF signal transceiver and conversion part is mainly used for the transceiver and the conversion of RF signals and baseband signals; the 92 part is mainly used for baseband processing and control of network equipment. The transceiving unit 91 may also be called a receiving/transmitting (transmitter) device, a receiving/transmitting machine, a receiving/transmitting circuit, and the like. Part 92 is usually the control center of the network device, and can usually be called a processing unit, which is used to control the source network device to execute the steps performed by the network device in FIG. 3 or FIG. 4 above. For details, please refer to the description of the relevant part above. The transceiving unit 91 can be used to implement the function of the transceiving unit 72 in the embodiment shown in FIG. 7, and the part 92 can be used to implement the function of the processing unit 71 in the embodiment shown in FIG. 7.

Part 92 can include one or more single boards, and each single board can include one or more processors and one or more memories. The processor is used to read and execute the programs in the memory to realize the baseband processing function and the network equipment. control. If there are multiple boards, the boards can be interconnected to increase processing capacity. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.

For example, in one embodiment, the transceiver unit 91 is used to perform the functions of the network device in steps S301 to S303, S305, and S307 to S308 in the embodiment shown in FIG. 3, and part 92 is used to perform the implementation shown in FIG. 3 The function of step S306 in the example.

For example, in another embodiment, the transceiver unit 91 is used to perform the functions of the network device in steps S401 to S403, S406, and S408 in the embodiment shown in FIG. 4, and part 92 is used to perform the embodiment shown in FIG. 4 The function of step S407 in.

The embodiments of the present application also provide a computer-readable storage medium, and the computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed, the method described in the above aspects is implemented.

The embodiments of the present application also provide a computer program product containing instructions, which, when the instructions run on a computer, cause the computer to execute the methods described in the foregoing aspects.

The embodiment of the present application also provides a communication system including the above-mentioned communication device.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the division of the unit is only a logical function division. In actual implementation, there can be other divisions. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not. carried out. The displayed or discussed mutual coupling, or direct coupling, or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. 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 application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be sent from a website, computer, server, or data center to another via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) A website, computer, server or data center for transmission. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium can be read-only memory (ROM), or random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, for example, Digital versatile disc (DVD) or semiconductor media, for example, solid state disk (SSD), etc.

Claims

A side link communication method, characterized by comprising:

When the first terminal and the second terminal are transmitting data through the side link, when the network device receives the side link response information sent by the second terminal, an error occurs, and the first terminal and the When the uplink signal quality between network devices is greater than or equal to the first signal quality threshold, the first terminal receives first information from the network device, and the first information is used to instruct the first terminal to The network device sends the response information of the side link; the first terminal sends the response information of the side link to the network device; or

When the first terminal is a sending terminal, the network device receives an error in the sidelink response information sent by the second terminal, and the uplink signal between the first terminal and the network device When the quality is less than or equal to the second signal quality threshold, the first terminal receives second information from the network device, and the second information is used to instruct the first terminal to change the transmission mode to not need to feed back the side The data repeat transmission mode of the response information of the uplink.
The method according to claim 1, wherein the situation that the network device receives the response information of the side link sent by the second terminal in error comprises: the network device cannot receive the response information sent by the second terminal The response information of the side link or the error response information NACK sent by the second terminal received by the network device exceeds the threshold of the number of times.
The method according to claim 1, wherein the second information includes the number of repeated data transmissions.
A side link communication method, characterized by comprising:

When the first terminal and the second terminal perform data transmission through the side link, the network device receives the side link response information sent by the second terminal in error, and the second terminal receives the data from the network The third information of the device, where the third information is used to instruct to disable the second terminal from sending the side link response information to the network device.
The method according to claim 4, wherein the method further comprises:

The second terminal sends a sounding reference signal to the network device, the network device measures the sounding reference signal, and the obtained uplink signal quality value between the second terminal and the network device is less than or equal to The third signal quality threshold: the network device cannot receive the side link response information sent by the second terminal, and the network device receives the side link response information sent by the second terminal in error.
The method according to claim 4, wherein the method further comprises:

When the second terminal sends wrong response information NACK to the network device exceeds the threshold of the number of times, the network device receives a situation in which an error occurs in the response information of the side link sent by the second terminal.
The method according to claim 4, wherein the second terminal is a sending terminal, and the second terminal receiving the third information from the network device includes any one of the following operations:

The second terminal receives downlink control information for the side link from the network device, where the downlink control information for the side link does not include side link feedback resources and does not include The uplink feedback resource of the response information of the side link; or

The second terminal receives the downlink control information for the side link from the network device, and the downlink control information for the side link is used to instruct to disable the second terminal to the network The device sends the response information of the side link.
The method according to claim 4, wherein before the second terminal receives the third information from the network device, the method further comprises:

The second terminal receives fourth information from the network device, where the fourth information is used to configure the second terminal to send the side link response information to the network device.
The method according to claim 8, wherein the fourth information includes any one of the following: high-level parameters, medium access control layer messages, master information blocks, and downlink control information for side links.
The method according to claim 8 or 9, wherein the method further comprises:

The second terminal receives one or more resources and information from the network device, and the one or more resources include: data resources, side link feedback resources, and information used to feed back side link response information. Uplink feedback resource, the one or more pieces of information include: the feedback timing of the side link feedback resource, the side link feedback resource and the uplink of the response information used to feed back the side link First time interval information between link feedback resources, and second time interval information between the data resource and the uplink feedback resource used to feed back response information of the side uplink;

The second terminal sends the response information of the side link to the first terminal according to the one or more resources and information.
The method according to claim 10, wherein the side link feedback resource and the uplink feedback resource used to feed back the response information of the side link are in the same or different resource sets. Resources.
A side link communication method, characterized by comprising:

When the first terminal and the second terminal perform data transmission through the side link, the network device determines that an error occurs when receiving the response information of the side link sent by the second terminal;

When the uplink signal quality between the first terminal and the network device is greater than or equal to the first signal quality threshold, the network device sends first information to the first terminal, and the first information is used for Instructing the first terminal to send sidelink response information to the network device; the network device receives the sidelink response information from the first terminal; or

When the uplink signal quality between the first terminal and the network device is less than or equal to the second signal quality threshold, the network device sends second information to the first terminal, and the second information is used Instructing the first terminal to change the transmission mode to a data repetitive transmission mode that does not need to feed back the response information of the side link.
The method according to claim 12, wherein the determining by the network device that an error occurs in receiving the response information of the side link sent by the second terminal comprises:

Receiving, by the network device, a sounding reference signal from the second terminal;

Measuring the sounding reference signal by the network device to obtain an uplink signal quality value between the second terminal and the network device;

When the uplink signal quality value between the second terminal and the network device is less than or equal to the third signal quality threshold, the network device determines to receive sidelink response information sent by the second terminal The situation where the error occurred.
The method according to claim 12, wherein the determining by the network device that an error occurs in receiving the response information of the side link sent by the second terminal comprises:

When the network device cannot receive the response information of the side link from the second terminal, the network device determines that an error occurs in receiving the response information of the side link sent by the second terminal .
The method according to any one of claims 12 to 14, wherein the method further comprises:

The network device sends third information to the second terminal, where the third information is used to instruct to disable the second terminal to send the side link response information to the network device.
A communication device characterized by being used to implement the method according to any one of claims 1 to 3.
A communication device characterized by being used to implement the method according to any one of claims 4-11.
A communication device, characterized by being used for implementing the method according to any one of claims 12-15.
A chip system including a processor for supporting terminal equipment to implement the communication method according to any one of claims 1 to 3.
A chip system, which includes a processor, and is used to support a network device to implement the communication method according to any one of claims 4-11.
A chip system, which includes a processor, and is used to support a network device to implement the communication method according to any one of claims 12-15.
A computer program product, used to implement the method according to any one of claims 1 to 3, or the method according to any one of claims 4 to 11, or as claimed in the claims when executed on a computing device The method of any one of 12-15.
A computer-readable storage medium with a computer program stored thereon, characterized in that, when the program is executed by a processor, the method according to any one of claims 1 to 3, or any one of claims 4 to 11 is implemented. Or the method according to any one of claims 12-15.