CN117560126A

CN117560126A - Communication method, device and system

Info

Publication number: CN117560126A
Application number: CN202210924041.4A
Authority: CN
Inventors: 刘俊; 彭文杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2024-02-13

Abstract

The application provides a communication method, a device and a system, which can solve the problem that HARQ feedback information sent by a receiving terminal on feedback resources determined by the receiving terminal is invalid at a sending terminal, thereby improving the resource utilization rate, and can be applied to the fields of 4G systems, 5G systems, future communication systems, such as 6G systems and the like. The method comprises the following steps: the first communication device determines first information, and indicates the first information to the second communication device. The first information indicates a first time when first retransmission feedback information corresponding to a first transmission is expected to reach the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information used for sending the first retransmission feedback information to the first communication device by the second communication device, and the first transmission is sent to the second communication device by the first communication device.

Description

Communication method, device and system

Technical Field

The present disclosure relates to the field of communications, and in particular, to a communication method, device, and system.

Background

In a new generation wireless (NR) side-link (SL) system, a transmitting terminal and a receiving terminal may communicate with a base station through side-link communication. To ensure the correctness of data transmission, both the transmitting and receiving parties can adopt a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) technology. Illustratively, the transmitting terminal transmits data to the receiving terminal, and the receiving terminal feeds back HARQ feedback information to the transmitting terminal, indicating whether the data is successfully received.

Specifically, the receiving terminal needs to feed back the HARQ feedback information to the transmitting terminal through the feedback resource, and if the feedback resource is self-determined by the receiving terminal, the HARQ feedback information sent by the receiving terminal on the self-determined feedback resource may be invalid at the transmitting terminal, thereby wasting resources.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and a communication system, which can solve the problem that retransmission feedback information sent by a receiving terminal on feedback resources determined by the receiving terminal at the transmitting terminal fails, thereby improving the resource utilization rate.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, a communication method is provided. The communication method comprises the following steps: the first communication device determines first information, and the first communication device indicates the first information to the second communication device. The first information indicates a first time when first retransmission feedback information corresponding to a first transmission is expected to reach the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information used for sending the first retransmission feedback information to the first communication device by the second communication device, and the first transmission is sent to the second communication device by the first communication device.

Based on the method provided in the first aspect, the first communication device determines and indicates, to the second communication device, information (first information) for determining a time of feeding back the resource, where the first information indicates a first time when the first communication device expects first retransmission feedback information corresponding to the first transmission to reach the first communication device, or indicates a first duration when the first communication device waits for receiving the first retransmission feedback information, or the first information is used for determining resource information for the second communication device to send the first retransmission feedback information to the first communication device. In this way, the first communication device controls the time range of the feedback resource (first resource) and notifies the second communication device, so that the first retransmission feedback information received by the first communication device cannot be invalid at the first communication device, and the resource utilization rate can be improved.

In one possible design, the determining, by the first communication device, the first information may include: the first communication device determines first information according to the first resource information and/or the buffer emptying information. The first resource information may indicate information of a feedback resource corresponding to the first transmission, and the buffer empty information may indicate a duration of time for which the first transmission is stored in the corresponding buffer.

Therefore, the first time indicated by the first information determined by the first communication device can be earlier than the time domain position of the feedback resource corresponding to the first transmission and/or the time when the first communication device empties the buffer corresponding to the first transmission, so that the first retransmission feedback information received by the first communication device cannot be invalid at the first communication device, and the resource utilization rate can be improved.

In one possible design, the determining, by the first communication device, the first information may include: the first communication device obtains first information.

Optionally, the first communication device obtains the first information, which may include: the first communication device receives first information from the third communication device.

In one possible design, the feedback resource corresponding to the first transmission may be used for the first communication device to send the second retransmission feedback information corresponding to the first transmission to the third communication device.

Alternatively, the third communication device may be a network device to which the first communication device belongs, or the third communication device may be a communication device that performs side-link communication with the first communication device.

Optionally, the feedback resource corresponding to the first transmission may include: uplink control channel resources corresponding to the first transmission, uplink shared channel resources corresponding to the first transmission, and/or side uplink feedback channel resources corresponding to the first transmission.

In one possible design manner, the determining, by the first communication device, the first information according to the first resource information and/or the buffer empty information may include: the first communication device determines the first information according to a time of the feedback resource corresponding to the first transmission and a time which is more front in time among the time of the first communication device emptying the buffer corresponding to the first transmission.

Therefore, the first moment indicated by the first information can be earlier than the moment when the first communication equipment empties the buffer corresponding to the first transmission and earlier than the moment when the feedback resource corresponding to the first transmission is fed back, so that the first retransmission feedback information received by the first communication equipment cannot be invalid at the first communication equipment, and the resource utilization rate can be improved.

Alternatively, the information carrying the resources of the first transmission is from the third communication device or the information carrying the resources of the first transmission is allocated by the third communication device.

Alternatively, the resource carrying the first transmission may be located in an unlicensed spectrum.

In one possible design, the cache flush information may include: the at least one transmission may include a first transmission, and the first storage duration may be a duration of time that the transmission is stored in a corresponding cache. Thus, a first duration of storage corresponding to the first transmission may be obtained.

Alternatively, the first resource information may be preconfigured, or predefined, or the first resource information may come from a network device to which the first communication device belongs.

Alternatively, the cache flush information may be pre-configured, pre-defined, or determined by the first communication device, or the cache flush information may be from a network device to which the first communication device belongs.

In one possible design manner, the indicating, by the first communication device, the first information to the second communication device may include: the first communication device indicates the first information to the second communication device in the case where the first condition is satisfied. Wherein the first condition may include one or more of: the first communication device obtains the cache flush information, the first communication device operates in a scheduled resource allocation mode and obtains the first resource information, the first communication device does not share resources of the first communication device to the second communication device, and the used resources of the second communication device to send the first retransmission feedback information to the first communication device are not determined by the first communication device.

Therefore, under the condition that the first condition is met, the first communication equipment indicates the first information to the second communication equipment, so that the first retransmission feedback information received by the first communication equipment cannot be invalid at the first communication equipment, and the resource utilization rate can be improved.

In one possible design manner, the first communication device does not share the resource of the first communication device to the second communication device, and may include: the first communication device does not share the determined channel occupancy time (channel occupancy time, COT) of the first communication device to the second communication device.

In one possible design manner, the indicating, by the first communication device, the first information to the second communication device may include: the first communication device transmits the first information to the second communication device.

As such, the first communication device may send the first information directly to the second communication device.

In one possible design manner, the indicating, by the first communication device, the first information to the second communication device may include: the first communication device transmits the second information to the second communication device. The second information may indicate a channel access priority level, the channel access priority level corresponding to the first information.

In this manner, the first communication device may indicate the first information by sending a channel access priority level.

In one possible embodiment, the first communication device starts the first timer when the first communication device indicates the first information to the second communication device. The first communication device determines whether the first communication device sends second retransmission feedback information corresponding to the first transmission to the third communication device or whether the first retransmission feedback information is ignored or retransmission resources are determined according to whether the first timer is running, whether the first timer is overtime and/or the arrival time of the first retransmission feedback information corresponding to the first transmission. The value or duration of the first timer may be determined according to the first information.

Therefore, the waste of power consumption can be further reduced through the first timer, and the resource utilization rate is further improved.

Optionally, if the first communication device receives the first retransmission feedback information corresponding to the first transmission when the first timer runs, and the first communication device works in the scheduling resource allocation mode, the first communication device sends the second retransmission feedback information corresponding to the first transmission to the third communication device through uplink resources.

Optionally, if the first communication device receives the first retransmission feedback information from the second communication device when the first timer is running, the first communication device operates in the autonomous resource selection mode, and the first retransmission feedback information corresponding to the first transmission includes (NACK), the first communication device triggers resource selection or reselection based on the autonomous resource selection mode, and sends retransmission information corresponding to the first retransmission feedback information to the second communication device by using the retransmission resource. If the first retransmission feedback information corresponding to the first transmission includes an Acknowledgement (ACK), the first communication device does not trigger resource selection or reselection.

Optionally, if the first communication device receives the first retransmission feedback information from the second communication device when or after the first timer expires, the first communication device ignores the first retransmission feedback information. Even if the first retransmission feedback information includes NACK, retransmission resources are not requested to the third communication device, resource selection or reselection based on the autonomous resource selection mode is not triggered, and power consumption can be reduced. This applies to the first communication device operating in the scheduled resource allocation mode as well as in the autonomous resource selection mode.

Optionally, if the first timer expires, the first communication device empties the buffer corresponding to the first transmission, or empties the buffer of the process occupied by the first transmission.

Optionally, if the first communication device does not receive the first retransmission feedback information from the second communication device when the first timer expires, the first communication device determines the retransmission resource.

Alternatively, the first communication device not receiving the first retransmission feedback information from the second communication device may implicitly indicate that the second communication device did not successfully receive the first transmission.

In one possible design, the determining, by the first communication device, retransmission resources may include: the first communication device requests retransmission resources from the third communication device. Alternatively, the first communication device triggers a resource selection or reselection based on an autonomous resource selection mode.

Thus, if the first communication device is operating in the scheduled resource allocation mode, the first communication device may request retransmission resources from the third communication device. If the first communication device is operating in an autonomous resource selection mode, the first communication device may trigger a resource selection or reselection based on the autonomous resource selection mode.

Optionally, the first information corresponds to a channel access priority class.

Optionally, the at least one first information, the at least one channel access priority class, and the at least one resource pool correspond to each other.

In one possible embodiment, the first communication device transmits the correspondence information to the second communication device. The corresponding relation information comprises at least one first information, at least one channel access priority level and/or at least one corresponding relation among resource pools.

Alternatively, the correspondence information may indicate a correspondence between the at least one first information and the at least one channel access priority class.

Optionally, the correspondence information may indicate a correspondence between at least one first information, at least one channel access priority level, and at least one resource pool.

Alternatively, the correspondence information may be preconfigured, predefined, determined by the first communication device, or from the third communication device.

In one possible embodiment, the first communication device transmits the third information to the second communication device. Wherein the third information indicates identification information of the correspondence. Alternatively, the third information may indicate information or identification information of a correspondence relationship that the first communication device desires or recommends for use by the second communication device. This may facilitate the second communication device in determining which correspondence to employ.

In one possible embodiment, the first communication device sends a first transmission to the second communication device.

Alternatively, the resources of the first communication device may include a channel occupation time COT determined by the first communication device.

In one possible design, the first communication device receives the first request information from the second communication device, and the first communication device sends the resource sharing information to the second communication device. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the first communication device shares a second resource to the second communication device.

As such, the first communication device receives first request information from the second communication device, the first request information for requesting sharing of resources of the first communication device, the first request information including one or more of: the information of the data to be sent, the identifier of the second communication device, the identifier of the fourth communication device, the resource scheduling mode adopted by the second communication device, and the sharing indication information, so that the first communication device can share the resource to the second communication device.

In one possible design, the resource sharing information may be determined according to the first request information.

In one possible design, the resource sharing information may include one or more of the following: the location of the second resource, the channel access mode, and the channel access priority.

In one possible design, the sending, by the first communication device, the resource sharing information to the second communication device may include: the first communication device determines to send the resource sharing information to the second communication device according to the second timer. Wherein the value or duration of the second timer comes from the second communication device.

In one possible embodiment, the first communication device starts the second timer when the first communication device receives the first request information from the second communication device.

In one possible design, the second timer is stopped when the first communication device generates the resource sharing information through the multiplexing and packetizing process.

In one possible design, the information of the data to be sent may include quality of service information, packet delay budget information, remaining packet delay budget information, and/or a size of the data to be sent, and the resource scheduling mode adopted by the second communication device may be a scheduling resource allocation mode or an autonomous resource selection mode.

In one possible design, the resource scheduling mode adopted by the second communication device is a scheduling resource allocation mode, which may indicate that the resource of the first communication device is not shared with communication devices other than the first communication device. The resource scheduling mode adopted by the second communication device is an autonomous resource selection mode, and can indicate to share the resources of the first communication device with communication devices other than the first communication device.

In one possible design, the sharing indication information may be used to indicate whether to share resources of the first communication device with communication devices other than the first communication device.

In a second aspect, a communication method is provided. The communication method comprises the following steps: the second communication device determines the first information, and the second communication device determines the first resource according to the first information. The first information indicates a first time when first retransmission feedback information corresponding to the first transmission arrives at the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information used for sending the first retransmission feedback information to the first communication device by the second communication device, and the first transmission is received by the second communication device from the first communication device. The first resource is used for the second communication device to send the first retransmission feedback information to the first communication device.

In one possible design, the time corresponding to the first resource may be the first time or before the first time, or a time interval between the time of the first transmission and the first resource is less than or equal to the first duration.

In one possible design manner, the determining, by the second communication device, the first information may include: the second communication device receives the first information from the first communication device.

In one possible design manner, the determining, by the second communication device, the first information may include: the second communication device determines the first information according to the second information and the corresponding relation information. The correspondence information may include at least one first information, at least one channel access priority level, and/or a correspondence between at least one resource pool, and the second information may indicate the channel access priority level.

In this way, the second communication device may obtain the first information corresponding to the channel access priority level according to the channel access priority level and the correspondence between the at least one first information and the at least one channel access priority level. Or the second communication device may obtain the first information according to the channel access priority, the resource carrying the first transmission or the resource pool to which the resource for sending the second information belongs, and the correspondence information.

In one possible design manner, the determining, by the second communication device, the first information according to the second information and the correspondence information may include: the second communication device determines the first information according to the second information, the corresponding relation information and the second resource information. The second resource information may indicate a resource pool to which the resource carrying the first transmission belongs.

Alternatively, the first resource may be located in an unlicensed spectrum.

In one possible design manner, the determining, by the second communication device, the first information according to the second information and the correspondence information may include: the second communication device determines the first information according to the second information, the corresponding relation information and the third information. Wherein the third information may indicate an identification of the correspondence.

Alternatively, the correspondence information may be preconfigured or predefined, or the correspondence information may come from the first communication device or from a network device to which the second communication device belongs.

Alternatively, the third information may come from the first communication device, or from a network device to which the second communication device belongs.

In one possible design, the second communication device receives the second information from the first communication device.

In one possible design manner, the determining, by the second communication device, the first resource according to the first information may include: the second communication device determines a time domain range of a resource selection window based on the autonomous resource selection mode according to the first information. The second communication device determines the first resource according to the time domain range.

In one possible design manner, the determining, by the second communication device, the first resource according to the first information may include: the second communication device determines a first resource from the resources of the second communication device based on the first information.

In one possible embodiment, the second communication device starts the first timer when the second communication device determines the first information. The value or duration of the first timer may be determined according to the first information.

In one possible design manner, the determining, by the second communication device, the first resource according to the first information may include: the second communication device determines a first resource based on the first information and the first timer.

In one possible design manner, the determining, by the second communication device, the first resource according to the first information may include: and under the condition that the second condition is met, the second communication device determines the first resource according to the first information. Wherein the second condition may include: the second communication device receives the fourth information from the first communication device and/or the second communication device fails to perform listen before talk (listen before talk, LBT) on the feedback resources corresponding to the first transmission that are preconfigured or indicated by the first communication device. Wherein the fourth information indicates resources for determining by the second communication device that the second communication device sent the first retransmission feedback information to the first communication device or indicates that the first communication device does not share resources of the first communication device with the second communication device.

In one possible embodiment, the second communication device receives the first transmission from the first communication device.

In one possible design, the second communication device uses the first resource to send the first retransmission feedback information to the first communication device.

In one possible design, the second communication device sends the first request information to the first communication device, and the second communication device receives the resource sharing information from the first communication device. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the first communication device shares a second resource to the second communication device.

In one possible embodiment, the second communication device transmits the value or the duration of the second timer to the first communication device. The value or duration of the second timer may be determined according to the time delay requirement of the data to be sent.

In one possible design, the information of the data to be sent includes service quality information, packet delay budget information, remaining packet delay budget information, and/or a size of the data to be sent, and the resource scheduling mode adopted by the second communication device may be a scheduling resource allocation mode or an autonomous resource selection mode.

In one possible design, the resource scheduling mode adopted by the second communication device is a scheduling resource allocation mode, which indicates that the resource of the first communication device is not shared with communication devices other than the first communication device. The resource scheduling mode adopted by the second communication device is an autonomous resource selection mode, and the resource scheduling mode is used for indicating the sharing of the resources of the first communication device with the communication devices except the first communication device.

In one possible embodiment, the second communication device determines that the third condition is satisfied, and the second communication device transmits the second request information to the first communication device. Wherein the third condition comprises one or more of: the method includes determining that resources of a first communication device are needed or of interest or are configured to be shared, not having established a unicast link with the first communication device, obtaining resource sharing information for the first communication device, determining that a resource sharing request needs to be sent, and determining that the first communication device needs to be requested to share resources. The second request information is used to request establishment of a unicast link.

Thus, when the second communication equipment has the requirement of sharing resources, the unicast link between the second communication equipment and the first communication equipment is triggered, and the reliability of the transmission of the first request information and/or the resource sharing information can be ensured.

In one possible design manner, the determining, by the second communication device, that the third condition is met may include: the access layer of the second communication device determines that the third condition is satisfied.

In one possible embodiment, the access layer of the second communication device sends fourth information and/or the destination identifier to the first protocol layer of the second communication device. The first protocol layer is a protocol layer above the access layer, and the fourth information is used for indicating that resources of the first communication device can be shared, requesting to share the resources of the first communication device, initiating unicast link establishment with the first communication device, sharing the resources of the communication device except the second communication device, or sharing the channel occupation time COT of the communication device except the second communication device.

In one possible design, the destination identifier may include an identifier of the first communication device, or a destination identifier corresponding to the first communication device.

In one possible embodiment, the first protocol layer of the second communication device receives fourth information and/or destination identification from the access layer of the second communication device.

In one possible design manner, the sending, by the second communication device, the second request information to the first communication device may include: the first protocol layer of the second communication device sends the second request information to the first communication device. Wherein the second request message is a first protocol layer message.

Alternatively, the second request information may include a destination identification.

In addition, the technical effects of the communication method described in the second aspect may refer to the technical effects of the communication method described in the first aspect, and are not described herein.

In a third aspect, a communication method is provided. The communication method comprises the following steps: the first communication device receives first request information from the second communication device, and the first communication device transmits resource sharing information to the second communication device. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the first communication device shares a second resource to the second communication device.

Based on the method provided in the third aspect, the first communication device receives first request information from the second communication device, the first request information being for requesting sharing of resources of the first communication device, the first request information including one or more of: the information of the data to be sent, the identifier of the second communication device, the identifier of the fourth communication device, the resource scheduling mode adopted by the second communication device, and the sharing indication information, so that the first communication device can share the resource to the second communication device.

In this way, the first communication device can determine which segment of resources to allocate to the second communication device based on the first request information.

Thus, if the second timer is not overtime, the first communication device sends the resource sharing information to the second communication device, so that the time delay requirement of the data to be sent can be met, and the reliability of the side uplink communication is ensured. If the second timer times out, the first communication device ignores or cancels sending the resource sharing information, so that resource waste can be avoided.

In one possible embodiment, the first communication device starts the second timer when the first communication device receives the first request information from the second communication device. Alternatively, the value or duration of the second timer may come from the second communication device.

In this way, the first communication device may stop running the second timer and transmit the resource sharing information when the first communication device is about to transmit the resource sharing information when the first communication device generates the resource sharing information.

In one possible design, the information of the data to be sent may include quality of service information, packet delay budget information, remaining packet delay budget information, and/or a size of the data to be sent, and the resource scheduling mode adopted by the second communication device may be a scheduling resource allocation mode or an autonomous resource selection mode. The first communication device may determine which segment of resources to allocate to the second communication device based on the information of the data to be transmitted.

Alternatively, the information of the data to be transmitted may be information related to the data to be transmitted or the service, and the second communication device requests to share the resource of the first communication device to transmit the data to be transmitted or the service.

Alternatively, the sharing indication information may indicate that the second communication device does not share the COT determined by the first communication device with communication devices other than the first communication device.

In this way, the first communication device may share a part of the resources in the COT determined by the first communication device to the second communication device, and may not use the remaining resources in the COT to communication devices other than the first communication device.

Alternatively, the sharing indication information may indicate that the second communication device may share (or agree to) the COT determined by the first communication device with communication devices other than the first communication device.

In this way, the first communication device may share a part of the resources in the COT determined by the first communication device to the second communication device, and may also use the remaining resources in the COT to communication devices other than the first communication device.

In a fourth aspect, a communication method is provided. The communication method comprises the following steps: the second communication device transmits the first request information to the first communication device, and the second communication device receives the resource sharing information from the first communication device. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the first communication device shares a second resource to the second communication device.

In one possible design, the destination identifier includes an identifier of the first communication device or a destination identifier corresponding to the first communication device.

Further, the technical effects of the communication method described in the fourth aspect may refer to the technical effects of the communication method described in the third aspect, and are not described herein.

In a fifth aspect, a communication method is provided. The communication method comprises the following steps: the second communication device determines that the third condition is satisfied, and the second communication device transmits second request information to the first communication device. Wherein the third condition comprises one or more of: the method includes determining that resources of a first communication device are needed or of interest or are configured to be shared, not having established a unicast link with the first communication device, obtaining resource sharing information for the first communication device, determining that a resource sharing request needs to be sent, and determining that the first communication device needs to be requested to share resources. The second request information is used to request establishment of a unicast link.

Based on the method provided in the fifth aspect, when the second communication device has a requirement of sharing resources, the unicast link between the second communication device and the first communication device is triggered, so that the reliability of the transmission of the first request information and/or the resource sharing information can be ensured.

Alternatively, the content specifically indicated by the fourth information may be related to the third condition.

In this manner, the second communication device may initiate a link establishment to the communication device to which the destination identification corresponds.

Alternatively, the first communication device may implement the function of the second communication device in the communication method provided in the fifth aspect, and the first communication device may be replaced with the second communication device, and the second communication device may be replaced with the first communication device.

In a sixth aspect, a communication device is provided. The communication device includes: a processing module and a transmitting module.

The processing module is used for determining the first information. And the sending module is used for indicating the first information to the second communication equipment. The first information indicates a first time when first retransmission feedback information corresponding to a first transmission is expected to reach the communication device, or indicates a first duration when the communication device waits for receiving the first retransmission feedback information, or the first information is used for determining resource information used for sending the first retransmission feedback information to the communication device by the second communication device, and the first transmission is sent to the second communication device by the communication device.

In one possible design, the processing module is further configured to determine the first information according to the first resource information and/or the cache empty information. The first resource information may indicate information of a feedback resource corresponding to the first transmission, and the buffer empty information may indicate a duration of time for which the first transmission is stored in the corresponding buffer.

In one possible design, the feedback resource corresponding to the first transmission may be used for the communication device to send the second retransmission feedback information corresponding to the first transmission to the third communication device.

Alternatively, the third communication device may be a network device to which the communication apparatus belongs, or the third communication device may be a communication device that performs side-uplink communication with the communication apparatus.

It should be noted that the receiving module and the transmitting module may be separately provided, or may be integrated into one module, i.e., the transceiver module. The specific implementation manner of the receiving module and the sending module is not specifically limited.

Optionally, the communication device according to the sixth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications device of the sixth aspect to perform the method of the first aspect.

The communication apparatus according to the sixth aspect may be the first communication device, or may be a chip (system) or other components or assemblies that may be provided in the first communication device, which is not limited in this application.

In addition, the technical effects of the communication device described in the sixth aspect may refer to the technical effects of the communication method described in any possible implementation manner of the first aspect, which are not described herein.

In a seventh aspect, a communication device is provided. The communication device includes: an acquisition module and a processing module.

The acquisition module is used for determining the first information. And the processing module is used for determining the first resource according to the first information. The first information indicates a first time when first retransmission feedback information corresponding to the first transmission arrives at the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information for sending the first retransmission feedback information to the first communication device, and the first transmission is received by the communication device from the first communication device. The first resource is used for the communication device to send first retransmission feedback information to the first communication device.

In one possible design, the seventh aspect provides a communication device further including: and a receiving module. The receiving module is used for receiving the first information from the first communication equipment.

In one possible design manner, the obtaining module is further configured to determine the first information according to the second information and the correspondence information. The correspondence information may include at least one first information, at least one channel access priority level, and/or a correspondence between at least one resource pool, and the second information may indicate the channel access priority level. The acquisition module and the processing module may be the same module.

Optionally, the communication device according to the seventh aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications device of the seventh aspect to perform the method of the second aspect.

The communication apparatus according to the seventh aspect may be the second communication device, or may be a chip (system) or other components or assemblies that may be provided in the second communication device, which is not limited in this application.

Further, the technical effects of the communication apparatus according to the seventh aspect may refer to the technical effects of the communication method according to any one of the possible implementation manners of the second aspect, which are not described herein.

In an eighth aspect, a communication device is provided. The communication device includes: a transmitting module and a receiving module.

The receiving module is used for receiving the first request information from the second communication equipment. And the sending module is used for sending the resource sharing information to the second communication equipment. Wherein the first request information is for requesting sharing of resources of the communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the communication apparatus shares the second resource to the second communication device.

Optionally, the communication device according to the eighth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communication device according to the eighth aspect to perform the method according to the third aspect.

The communication apparatus according to the eighth aspect may be the first communication device, or may be a chip (system) or other components or assemblies that may be provided in the first communication device, which is not limited in this application.

Further, the technical effects of the communication apparatus according to the eighth aspect may refer to the technical effects of the communication method according to any one of the possible implementation manners of the third aspect, which are not described herein.

In a ninth aspect, a communication apparatus is provided. The communication device includes: a transmitting module and a receiving module. The sending module is used for sending the first request information to the first communication equipment. And the receiving module is used for receiving the resource sharing information from the first communication equipment. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of a communication device, an identification of a fourth communication apparatus, a resource scheduling mode adopted by the communication device, and sharing instruction information. The fourth communication device is a receiving device for requesting resources for transmission by the communication device. The resource sharing information is information indicating a second resource shared by the first communication device to the communication apparatus.

In one possible design, the sending module is further configured to send the value or the duration of the second timer to the first communication device. The value or duration of the second timer may be determined according to the time delay requirement of the data to be sent.

Optionally, the communication device according to the ninth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communication device according to the ninth aspect to perform the method according to the fourth aspect.

The communication apparatus according to the ninth aspect may be the second communication device, or may be a chip (system) or other components or assemblies that may be provided in the second communication device, which is not limited in this application.

Further, the technical effects of the communication apparatus according to the ninth aspect may refer to the technical effects of the communication method according to any one of the possible implementation manners of the fourth aspect, which are not described herein.

In a tenth aspect, a communication device is provided. The communication device includes: a processing module and a transmitting module.

And the processing module is used for determining that the third condition is met. And the sending module is used for sending the second request information to the first communication equipment. Wherein the third condition comprises one or more of: the method includes determining that resources of a first communication device are needed or of interest or are configured to be shared, not having established a unicast link with the first communication device, obtaining resource sharing information for the first communication device, determining that a resource sharing request needs to be sent, and determining that the first communication device needs to be requested to share resources. The second request information is used to request establishment of a unicast link.

In one possible embodiment, the processing module includes an access layer of the communication device, which is configured to determine that the third condition is met.

Optionally, the communication device according to the tenth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by the processing module, enable the communications device of the tenth aspect to perform the method of the fifth aspect.

The communication apparatus according to the tenth aspect may be the second communication device or the first communication device, or may be a chip (system) or other parts or components that may be provided in the second communication device or the first communication device, which is not limited in this application.

When the communication apparatus according to the tenth aspect is the first communication device, the first communication device in the tenth aspect may be replaced with the second communication device.

Further, the technical effects of the communication device according to the tenth aspect may refer to the technical effects of the communication method according to any one of the possible implementation manners of the fifth aspect, which are not described herein.

In an eleventh aspect, a communication apparatus is provided. The communication device includes: a processor coupled to a memory for storing a computer program.

The processor is configured to execute a computer program stored in the memory such that the communication method as described in any one of the possible implementations of the first to fifth aspects is performed.

In one possible design, the communication device according to the eleventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an input/output port. The transceiver may be used for the communication means to communicate with other devices.

The input port may be used to implement the receiving functions of the first to fifth aspects, and the output port may be used to implement the transmitting functions of the first to fifth aspects.

In this application, the communication apparatus according to the eleventh aspect may be the first communication device, or the second communication device, or a chip system disposed inside the first communication device, or the second communication device.

Further, the technical effects of the communication apparatus according to the eleventh aspect may refer to the technical effects of the communication method according to any implementation manner of the first to fifth aspects, and are not described herein.

In a twelfth aspect, a communication system is provided. The communication system comprises a communication apparatus according to the sixth aspect and a communication apparatus according to the seventh aspect, or comprises a communication apparatus according to the eighth aspect and a communication apparatus according to the ninth aspect, or comprises a communication apparatus according to the tenth aspect and a first communication device, or comprises a communication apparatus according to the tenth aspect (the communication apparatus is a first communication device) and a second communication device.

In a thirteenth aspect, a chip system is provided that includes logic circuitry and an input/output port. Wherein the logic circuit is configured to implement the processing functions according to the first to fifth aspects, and the input/output port is configured to implement the transceiver functions according to the first to fifth aspects. In particular, the input port may be used to implement the receiving functions of the first to fifth aspects, and the output port may be used to implement the transmitting functions of the first to fifth aspects.

In one possible design, the system on a chip further comprises a memory for storing program instructions and data implementing the functions of the first to fifth aspects.

The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a fourteenth aspect, there is provided a computer readable storage medium having stored thereon a computer program or instructions; the computer program or instructions, when run on a computer, cause the communication method of any one of the possible implementation manners of the first to fifth aspects to be performed.

A fifteenth aspect provides a computer program product comprising a computer program or instructions which, when run on a computer, cause the communication method of any one of the possible implementations of the first to fifth aspects to be performed.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a channel access provided in an embodiment of the present application;

fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 4 is a flow chart of another communication method according to an embodiment of the present application;

fig. 5 is a flow chart of another communication method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiments of the present application may be applied to various communication systems, such as a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a wireless local area network (wireless local area network, WLAN), a wireless fidelity (wireless fidelity, wi-Fi) system, a wired network, a vehicle-to-arbitrary object (vehicle to everything, V2X) communication system, an inter-device (D2D) communication system, a car networking communication system, a 4th generation (4th generation,4G) mobile communication system, such as a long term evolution (long term evolution, LTE) system, a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) mobile communication system, such as a new generation wireless (new radio, NR) system, and future communication systems, such as a sixth generation (6th generation,6G) mobile communication system, etc.

The present application will present various aspects, embodiments, or features about a system that may include multiple devices, components, modules, etc. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, combinations of these schemes may also be used.

In addition, in the embodiments of the present application, words such as "exemplary," "for example," and the like are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

In the embodiments of the present application, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

To facilitate understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail first with reference to the communication system shown in fig. 1 as an example. Fig. 1 is a schematic architecture diagram of a communication system to which the communication method according to the embodiment of the present application is applicable.

As shown in fig. 1, the communication system includes a transmitting terminal and a receiving terminal, and may further include a network device.

The sending terminal and the receiving terminal may be terminal devices. Communication between the transmitting terminal and the receiving terminal may be via a side-link (or PC5 interface). The transmitting terminal and the receiving terminal may be both within the network coverage, one party may be within the network coverage, the other party may be outside the network coverage, or both may be outside the network coverage. When both the transmitting terminal and the receiving terminal performing the side-link communication are within the network coverage, the serving base station of the transmitting terminal and the serving base station of the receiving terminal may be the same or different.

The terminal device is illustratively an access communication system, and a terminal having a wireless transceiving function or a chip system that can be provided in the terminal. A terminal device in this application may also be referred to as a terminal, user Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminals in the embodiments of the present application may be a Road Side Unit (RSU), a mobile phone (mobile phone), a tablet (pad), an unmanned aerial vehicle, a computer with a wireless transceiving function, a customer premise equipment (customer premise equipment, CPE), a Virtual Reality (VR) terminal, an augmented reality (augmented reality, AR) terminal, an internet of things terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned aerial vehicle (self driving), a wireless terminal in remote medical (remote media), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant), a handheld device with a wireless communication function, a modem or a wireless terminal in a smart grid (smart grid), a wireless terminal in a future-oriented network (PDA), or other device, a wireless processing device, etc.

For another example, the terminal device in the present application may be an express terminal in smart logistics (e.g., a device that can monitor the position of a cargo vehicle, a device that can monitor the temperature and humidity of cargo, etc.), a wireless terminal in smart agriculture (e.g., a wearable device that can collect data related to livestock, etc.), a wireless terminal in smart architecture (e.g., a smart elevator, a fire monitoring device, and a smart meter, etc.), a wireless terminal in smart medical (e.g., a wearable device that can monitor the physiological state of a person or animal), a wireless terminal in smart transportation (e.g., a smart bus, a smart vehicle, a sharing bicycle, a charging pile monitoring device, a smart traffic light, and a smart monitoring and parking device, etc.), a wireless terminal in smart retail (e.g., a vending machine, a self-service checkout machine, and an unmanned convenience store, etc.). For another example, the terminal device in the present application may be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in a vehicle as one or more components or units, and the vehicle may implement the method provided in the present application through the in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit that is built in.

The network device may be connected to the transmitting terminal, for example, through a Uu port. The above network device may also be referred to as an access network device, an access device or a radio access network device, where the network device is capable of managing radio resources, providing access services for the terminal device, and completing forwarding of data between the terminal device and the core network, and may also be understood as a base station in the network.

The network device in the embodiment of the present application may be any communication device having a wireless transceiving function for communicating with a terminal device, for example. The network devices include, but are not limited to: RSU, evolved Node B (eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (HeNB, or home Node B, HNB), base Band Unit (BBU), access Point (AP), radio relay Node, radio backhaul Node, transmission point (transmission point, TP), or transmission reception point (transmission and reception point, TRP) in a wireless fidelity (wireless fidelity, WIFI) system, or the like, may also be 5G, such as a gNB in an NR system, or a transmission point (TRP or TP), one or a set of antenna panels (including a plurality of antenna panels) of a base station in a 5G system, or may also be a network Node constituting a gNB or a transmission point, such as a Base Band Unit (BBU), or a Distributed Unit (DU), or the like, or may also be a base band satellite, a DU, or the like.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (media access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. The information of the RRC layer is generated by the CU and finally becomes PHY layer information through PHY layer encapsulation of DU, or is converted from the information of the PHY layer. Thus, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be sent by DUs, or by dus+aaus. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into access network devices in an access network (radio access network, RAN), or may be divided into access network devices in a Core Network (CN), which is not limited in this application.

Alternatively, the communication system shown in fig. 1 may be applied to the communication network in question at present, or may be applied to other networks in the future, etc., which are not limited in particular by the embodiments of the present application.

Optionally, the communication method provided in the embodiment of the present application may be applied between any two nodes shown in fig. 1, and specific implementation may refer to the following method embodiment, which is not described herein again.

It should be noted that the solution in the embodiments of the present application may also be applied to other communication systems, and the corresponding names may also be replaced by names of corresponding functions in other communication systems.

It should be understood that fig. 1 is a simplified schematic diagram that is merely exemplary for ease of understanding, and that other network devices, and/or other terminal devices, may also be included in the communication system, which are not shown in fig. 1.

In order to make the embodiments of the present application clearer, the following description will make some of the contents and concepts related to the embodiments of the present application.

First, HARQ feedback information, side-link resources, and HARQ feedback resources

Exemplary HARQ feedback information may include, but is not limited to: ACK for correct acknowledgement, or NACK for negative acknowledgement.

For example, the transmitting terminal transmits data to the receiving terminal, and if the receiving terminal successfully receives the data, the transmitting terminal transmits ACK; and if the receiving terminal does not successfully receive the data, transmitting NACK to the transmitting terminal.

Illustratively, the side-uplink resources may be used by the transmitting terminal to transmit data to the receiving terminal.

For example, the sidelink resource may be a physical sidelink shared channel (physical sidelink shared channel, PSSCH), which is not limited in this application.

For example, HARQ feedback resources may be used to transmit HARQ feedback information. For example, the receiving terminal may transmit HARQ feedback information to the transmitting terminal on HARQ feedback resources.

The HARQ feedback resource may be a physical side uplink feedback channel (physical sidelink feedback channel, PSFCH) for example, which is not limited in this application.

For a resource pool with HARQ feedback resources, one PSFCH is associated with each PSSCH. The transmitting terminal and the receiving terminal may determine PSFCH associated with any one of the PSSCHs in the resource pool according to the configuration of the resource pool.

Second, listen-before-talk, type1 (type 1) channel access, and channel occupancy time

Listen before talk LBT: before transmitting data, the channel is monitored, whether the channel is idle or not is detected, and the channel can be used only when a certain condition is met (for example, the channel is idle), so that channel access conflict can be avoided, and channel spectrum sharing is realized.

LBT is commonly used in the following system: wi-Fi systems, LTE assisted licensed access (licensed assisted access, LAA) systems, and unlicensed new generation wireless (new radio unlicensed, NR-U) systems, etc.

The NR-U system is an NR system for communication based on an unlicensed spectrum, the unlicensed spectrum is a shared spectrum, the unlicensed spectrum is a frequency band which is not licensed for wireless communication, and any person can use the frequency band according to regional spectrum rules.

The following describes the channel access by taking an NR-U system as an example. Fig. 2 is a schematic diagram of channel access according to an embodiment of the present application.

Type1 (type 1) channel access scheme: the COT is determined by the LBT, and the channel in the COT is presumed to be idle, so that the channel can be accessed in the COT. Illustratively, in connection with fig. 2, a random value N satisfying a certain condition is generated, and the initial value of the counter is set to N. At T _d In-band channel listening (sense), if the listening result is idle (i.e. the channel is idle during the listening slot (sensing slot duration)), the counter is decremented by 1, if the counter is not 0, then continuing with the following T _d Monitoring a channel; if the counter is reduced to 0, the listening is stopped, indicating that the channel is accessible. At this time, one COT may be generated.

Alternatively T _d ＝T _f +m _p *T _si Wherein T is _f ＝16us，T _si ＝9us，m _p Is a random value.

Optionally, the duration of the COT is related to the channel access priority class (channel access priority class, CAPC).

Type 2C (type 2C) channel access mode: uu communication is taken as an example. After the network device determines the COT through the LBT, the network device can transmit by adopting the resources in the COT, and optionally, the COT can be shared for the terminal device to use. If the interval between the transmission performed by the terminal device using a certain section of resource in the COT and the previous transmission is less than 16us, the terminal device does not need to perform LBT, and can directly use the resource, and the channel access mode is called type 2C (type 2C) channel access.

Type 2A (type 2A) channel access mode (corresponding to 16us described below) and type 2B (type 2B) channel access mode (corresponding to 25us described below): if the interval between the transmission of a certain section of resource in the COT and the previous transmission is 16us or 25us, the terminal equipment needs to perform LBT (monitoring time slot (monitoring channel) in 16us or 25 us) to share the COT, but random monitoring is not needed; if the LBT is successful (i.e., the result of the listening channel for the listening slot within 16us or 25us is idle), the resource may be used, otherwise if the LBT fails (i.e., the result of the listening channel is not idle), the resource cannot be used.

In addition, if the interval between the terminal device using a certain section of resource in the COT and the previous transmission is neither less than 16us nor equal to 16us or 25us, the terminal device cannot share the COT and needs to access the channel by self through the type 1 channel access mode.

In the present application, LBT success may refer to that the result of listening to the channel is idle, and LBT failure may refer to that the result of listening to the channel is not idle. Illustratively, when the physical layer performs an LBT procedure and no transmission is performed (or no access channel (fails to access the channel(s) prior to an intended transmission) is prior to the intended transmission), the physical layer sends an LBT failure indication to the MAC entity.

Third, a scheduling resource allocation mode, and an autonomous resource selection mode

Illustratively, the communication resource allocation pattern of the side-link includes: a scheduled resource allocation mode, and an autonomous resource selection mode. Among them, the scheduled resource allocation mode may be referred to as mode1 (mode 1), and the autonomous resource selection mode may be referred to as mode2 (mode 2).

In the scheduled resource allocation mode, the network device allocates resources for the terminal device. For example, the network device may allocate resources by means of a dedicated radio network temporary identity (radio network temporary identifier, RNTI) of the terminal device. The scheduling resource allocation mode may be employed when the terminal device is in an RRC connected state.

In the autonomous resource selection mode, the terminal device autonomously acquires resources in the resource pool. For example, the terminal device may obtain the resource pool configuration by pre-configuration, system message broadcasting, or dedicated signaling, and obtain resources from the resource pool according to the resource pool configuration. Resources in the resource pool can be shared for use by more than one terminal device. The autonomous resource selection mode may be applicable to a case where the terminal device is in coverage (in coverage) or out of coverage (out of coverage).

In some embodiments, the receiving terminal needs to feed back the HARQ feedback information to the transmitting terminal through the feedback resource, and if the feedback resource is self-determined by the receiving terminal, the HARQ feedback information sent by the receiving terminal on the self-determined feedback resource is disabled at the transmitting terminal, thereby wasting resources.

Take the example of operation in mode 1. The receiving terminal sends the HARQ feedback information to the sending terminal through the feedback resource, the sending terminal adopts a physical uplink control channel (physical uplink control channel, PUCCH) to send the HARQ feedback information to the network equipment (assuming that the HARQ feedback information is NACK) so as to request the retransmission resource, and adopts the retransmission resource to send retransmission information corresponding to the HARQ feedback information to the receiving terminal. If the feedback resource is determined by the receiving terminal (for example, a type 1 channel access mode is adopted), the receiving terminal cannot know the time of the PUCCH, and the transmitting terminal cannot predict the position of the feedback resource determined by the receiving terminal, which may cause the time of the feedback resource to be later than the time of the PUCCH, the HARQ feedback information misses the PUCCH, and the HARQ feedback information fails at the transmitting terminal, and the PUCCH cannot be adopted to transmit NACK or ACK to the network device so that the network device determines whether to schedule retransmission resources to the receiving terminal, thereby wasting resources and wasting LBT monitoring power consumption. For example, feedback resources transmitted from the receiving terminal to the transmitting terminal are wasted, and LBT monitoring power consumption for the feedback resources is wasted.

Taking the mode 2 as an example, the receiving terminal sends the HARQ feedback information to the sending terminal through the feedback resource, the sending terminal triggers the resource selection or reselection based on the mode 2 to obtain the retransmission resource, and the retransmission resource is adopted to send the retransmission information corresponding to the HARQ feedback information to the receiving terminal. If the feedback resource is determined by the receiving terminal, the time of the feedback resource may be later than the time when the sending terminal empties the buffer memory corresponding to the HARQ feedback information (the buffer memory includes retransmission information), so that the buffer memory corresponding to the HARQ feedback information is emptied before the sending terminal receives NACK, and the HARQ feedback information is invalid at the sending terminal, so that the retransmission information corresponding to the HARQ feedback information cannot be sent to the receiving terminal, and resource waste and LBT monitoring power consumption are caused. For example, feedback resources are wasted, and LBT listening power consumption of the feedback resources is wasted.

In some embodiments, unlicensed spectrum may be employed between terminal devices to transmit data, but in unlicensed spectrum, it is yet to be determined how one terminal device shares resources with another terminal device.

The communication method provided in the embodiments of the present application will be specifically described below with reference to fig. 3 to 5. In which, the terms and the like related to the embodiments of the present application may refer to each other without limitation. The object name, the parameter name, and the like in the embodiment of the present application are just an example, and other names may be used in the specific implementation without limitation.

The present application provides a number of approaches to SL transport mechanisms, which are described below with respect to fig. 3-5, respectively. Some of these methods are directed to only a portion of the flows in the SL transport mechanism, and some may be applied to any one or more of the flows in the SL transport mechanism. It should be understood that the methods shown in fig. 3-5 may be used in combination with each other, for example, one method (e.g., the method shown in fig. 3) may be used by a certain flow in the SL transmission mechanism and another method (e.g., the method shown in fig. 4) may be used by another flow in the SL transmission mechanism, or both one method (e.g., the method shown in fig. 4) and another method (e.g., the method shown in fig. 5), and the technical features in the different embodiments and the respective implementation/implementation methods in the embodiments may be combined to form a new embodiment, implementation method, or implementation method according to the internal logic relationship thereof, and each step in the embodiments may be optional.

It should be understood that the SL transmission mechanism may change with the evolution of the technical solution, and the technical solution provided in the present application is not limited to the process described below. Further, the description of the scenario in the embodiment of the present application is only an example, and the scheme in the embodiment of the present application is not limited to be applied only to describing the scenario, and is also applicable to the scenario with similar problems.

Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application. In the method shown in fig. 1 and fig. 3, the third communication device may be a network device, or a network device to which the first communication device belongs (or a network device to which the first communication device accesses, or a network device serving the first communication device), or a communication device performing side uplink communication with the first communication device, where the first communication device may be a transmitting terminal, and the second communication device may be a receiving terminal. Alternatively, the first communication device may be a receiving terminal and the second communication device may be a transmitting terminal.

As shown in fig. 3, the communication method includes the steps of:

s301, the first communication device determines first information.

The first information may indicate, for example, a first time at which first retransmission feedback information corresponding to the first transmission is expected to arrive at the first communication device.

In the present application, the transmission in the first transmission may be replaced by data, a data packet, a Transport Block (TB), a MAC protocol data unit (protocol data unit, PDU), or a PSSCH.

Alternatively, the first transmission may be sent by the first communication device to the second communication device.

For example, the first information may indicate that the first communication device expects first retransmission feedback information corresponding to the first transmission to arrive at the first communication device at or before the first time.

Alternatively, the first time may be the latest time or any time before the latest time.

For example, the first information may indicate a latest time at which the first communication device expects the first retransmission feedback information corresponding to the first transmission to reach the first communication device. As such, the first communication device expects the first retransmission feedback information to arrive before the latest instant.

Alternatively, the first retransmission feedback information may include HARQ feedback information or the like. For example, the first retransmission feedback information may include an ACK, or a NACK.

Alternatively, the first information may indicate, for example, a first duration for which the first communication device waits to receive first retransmission feedback information corresponding to the first transmission.

Alternatively, the first information may indicate that the first communication device expects the first retransmission feedback information to arrive within a first time period, for example.

For example, the first duration of waiting to receive the first retransmission feedback information corresponding to the first transmission may refer to: the time period t1 between the time of the first transmission and the time of the second retransmission feedback information, or the time period t2 between the time domain position of the resource carrying the first transmission and the time of the second retransmission feedback information, or the time period t1-k, or the time period t2-k, or the time period t3 between the time of the first transmission and the time of the first communication equipment for emptying the buffer corresponding to the first transmission, or the time period t3-q.

Illustratively, the time period k may include a time period required by the first communication device to process the first retransmission feedback information related behavior. For example, the duration k may include a processing duration required for the first communication device to receive the first retransmission feedback information from the second communication device to generate the second retransmission feedback information according to the first retransmission feedback information.

Illustratively, the duration q may include a duration required by the first communication device to process the first retransmission feedback information related behavior.

For example, the time period t1-k may refer to a time period between a time of the first transmission and a time of the first retransmission of the feedback information.

For example, the time period t2-k may refer to a time period between a time domain location of a resource carrying the first transmission to a time instant of the first retransmission feedback information.

The first communication device receives first retransmission feedback information for the first transmission from the second communication device, and then sends second retransmission feedback information for the first transmission to the third communication device, which may be generated by the first communication device from the first retransmission feedback information.

In this application, the time of the first transmission may refer to: the first communication device may be configured to send the first transmission at a time, at a start time or a stop time when the first communication device sends the first transmission, at a time when the second communication device receives the first transmission, or at a start time or a stop time when the second communication device receives the first transmission.

In this application, the time of the second retransmission feedback information may refer to: the first communication device sends the second retransmission feedback information to the third communication device at the time, and sends the first communication device at the starting time or the ending time of the second retransmission feedback information.

In this application, the time of the first retransmission feedback information may refer to: the first communication device receives the first retransmission feedback information, or the first communication device receives the starting time or the ending time of the first retransmission feedback information.

Optionally, the information carrying the resources of the first transmission is from the third communication device, or the information carrying the resources of the first transmission is allocated by the third communication device.

Alternatively, the resource carrying the first transmission may be a side-link resource, e.g., a PSSCH or the like.

Alternatively, the resource carrying the first transmission may be located in an unlicensed spectrum, which is not limited in this application. For example, the PSSCH may be located in unlicensed spectrum.

Alternatively, the first time period may be a maximum time period, or any time period less than the maximum time period.

Illustratively, the maximum duration may be: the time period t1 between the time of the first transmission and the time of the second retransmission feedback information, or the time period t2 between the time domain position of the resource carrying the first transmission and the time of the second retransmission feedback information, or the time period t1-k, or the time period t2-k, or the time period t3 between the time of the first transmission and the time of the first communication equipment for emptying the buffer corresponding to the first transmission, or the time period t3-q. The description of the time period k and the time period q may refer to the above, and will not be repeated here.

For example, the first information may indicate a maximum duration for which the first communication device waits to receive the first retransmission feedback information, or within which the first communication device expects the first retransmission feedback information to arrive.

Alternatively, the first information may be used to determine resource information for the second communication device to send the first retransmission feedback information to the first communication device, for example.

Alternatively, the resource information may include, but is not limited to: location of the resource the location of the resource may include, but is not limited to: time domain location of the resource.

For example, the resource used for the second communication device to send the first retransmission feedback information to the first communication device may be referred to as a feedback resource, e.g., may be a PSFCH, which is not limited in this application.

In one possible design manner, S301 may include: the first communication device determines first information according to the first resource information and/or the buffer emptying information.

Alternatively, the first communication device may determine the first information based on the first resource information.

Alternatively, the first communication device may determine the first information according to the cache empty information.

Alternatively, the first communication device may determine the first information according to the first resource information and the cache empty information.

Optionally, the first communication device determines the first information according to the first resource information, and may include: the first communication device determines first information according to the first resource information and information carrying the first transmitted resource.

Optionally, the determining, by the first communication device, the first information according to the cache empty information may include: the first communication device may determine the first information based on the cache flush information and information carrying the first transmitted resource.

Optionally, the determining, by the first communication device, the first information according to the first resource information and the cache empty information may include: the first communication device determines first information according to the first resource information, the buffer emptying information and information carrying the first transmitted resource.

In some embodiments, the determining, by the first communication device, the first information according to the first resource information may include: the first communication device determines first information based on the first resource information and the first processing information.

Alternatively, the first processing information may indicate a duration k required by the first communication device to process the first retransmission feedback information related behaviour. For example, the first processing information may indicate a processing duration k required for the first communication device to receive the first retransmission feedback information from the second communication device to the first communication device to generate the second retransmission feedback information according to the first retransmission feedback information.

In some embodiments, the determining, by the first communication device, the first information according to the cache empty information may include: the first communication device determines first information according to the cache empty information and the second processing information.

Alternatively, the second processing information may indicate a time period q required by the first communication device to process the first retransmission feedback information related behaviour.

In some embodiments, the first resource information may indicate information of a feedback resource corresponding to the first transmission.

Optionally, the feedback resource corresponding to the first transmission may be used for the first communication device to send the second retransmission feedback information corresponding to the first transmission to the third communication device.

Illustratively, the feedback resource corresponding to the first transmission may include an uplink control channel (e.g., PUCCH) resource corresponding to the first transmission, an uplink shared channel (e.g., PUSCH) resource corresponding to the first transmission, and/or a side-link feedback channel (e.g., PSFCH) resource corresponding to the first transmission, which is not limited in this application.

For example, if the third communication device is a network device to which the first communication device belongs, the feedback resource corresponding to the first transmission is PUCCH. If the third communication device is a communication device that performs side-link communication with the first communication device, the feedback resource corresponding to the first transmission is PSFCH.

The first communication device receives first retransmission feedback information from the second communication device, and the first communication device sends second retransmission feedback information corresponding to the first transmission to the third communication device by adopting feedback resources corresponding to the first transmission.

The first communication device receives first retransmission feedback information for the first transmission from the second communication device, and then sends second retransmission feedback information for the first transmission to the third communication device.

Optionally, if the first retransmission feedback information includes an ACK, the second retransmission feedback information includes an ACK. If the first retransmission feedback information comprises NACK, the second retransmission feedback information comprises NACK.

Optionally, the information of the feedback resource corresponding to the first transmission may include, but is not limited to, a position of the feedback resource corresponding to the first transmission, and the position of the feedback resource corresponding to the first transmission may include, but is not limited to, a time domain position of the feedback resource corresponding to the first transmission.

Alternatively, the first resource information may be preconfigured, or predefined, or the first resource information may be from a network device to which the first communication device belongs.

For example, in this application, predefined may refer to protocol definitions.

In some embodiments, the cache flush information may indicate a length of time that the first transmission is held in the corresponding cache.

For example, the buffer empty information may indicate a duration for which the first communication device holds the first transmission in a buffer corresponding to the first transmission.

Alternatively, the buffer empty information may indicate a time at which the first communication device empties the buffer corresponding to the first transmission.

Illustratively, the latest time may be: the time domain position of the feedback resource corresponding to the first transmission, or the time obtained by subtracting the time length k from the time domain position of the feedback resource corresponding to the first transmission.

For example, the specific implementation of the duration k may refer to the above description, and will not be repeated here.

For example, the latest time may be: the time domain position of the uplink control channel (such as PUCCH) corresponding to the first transmission, the time domain position obtained by subtracting the time length k from the time domain position of the uplink control channel corresponding to the first transmission, the time domain position of the uplink shared channel (such as PUSCH) corresponding to the first transmission, the time domain position obtained by subtracting the time length k from the time domain position of the uplink shared channel corresponding to the first transmission, or the time domain position of the side uplink feedback channel (such as PSFCH) corresponding to the first transmission, the time domain position obtained by subtracting the time length k from the time domain position of the side uplink feedback channel corresponding to the first transmission.

Alternatively, the latest time may be, for example: the time when the first communication device empties the buffer corresponding to the first transmission, or the time when the first communication device empties the buffer corresponding to the first transmission minus the time obtained by subtracting the time length q. For example, the specific implementation of the duration q may refer to the above description, and will not be repeated here.

Optionally, the buffer corresponding to the first transmission may include retransmission information corresponding to the first transmission.

For example, the retransmission information may include data or TB or the like included in the first transmission, or the retransmission information may be the first transmission.

For example, the first communication device receives first retransmission feedback information (corresponding to the first transmission) from the second communication device, if the first retransmission feedback information includes NACK, the first communication device transmits retransmission information to the second communication device, and if the first retransmission feedback information includes ACK, the first communication device does not transmit retransmission information.

Optionally, the cache flush information may include: correspondence of at least one transmission with at least one first duration of storage.

Optionally, the at least one transmission may include a first transmission.

For example, the at least one transmission may include one or more transmissions, the transmissions may be sent by the first communication device to the second communication device, and the implementation of the transmissions may be described above with reference to the first transmission, which is not described herein.

Alternatively, the first holding time period may be a time period during which the transmission is held in the corresponding buffer.

The first holding duration may be, for example, a duration in which the first communication device holds the transmission in the corresponding buffer.

For example, assuming that the first holding time period is time period 2, the first communication device empties the buffer corresponding to the first transmission when or after the transmission corresponding timer is equal to time period 2.

For example, there may be a one-to-one correspondence between at least one first transmission and at least one first duration of storage, or a one-to-many, or a many-to-one, and the present application is not limited.

Or, alternatively, the cache flush information may include: the correspondence between the at least one second communication device and the at least one second storage duration may be a duration in which the first communication device stores data of the second communication device (data related to the second communication device) in the corresponding cache.

Illustratively, assuming that the first transmission is a transmission between the first communication device and the second communication device 1, buffering the flush information includes: the second communication device 1 corresponds to the second storage duration 1, and/or the second communication device 2 corresponds to the second storage duration 2, and the duration of storing the first transmission in the corresponding buffer by the first communication device may be the second storage duration 1.

Or, alternatively, the cache flush information may include: the corresponding relation between at least one first process and at least one third storage duration, where the third storage duration may be a duration of storing, by the first communication device, data of the first process in a corresponding cache, and the first process may be a process between the first communication device and the second communication device.

Illustratively, assuming that the first transmission is a corresponding transmission in the first process 1, the cache flush information includes: the first process 1 corresponds to the third storage duration 1, and/or the first process 2 corresponds to the third storage duration 2, and the duration of storing the first transmission in the corresponding buffer by the first communication device may be the third storage duration 1.

Or, alternatively, the cache flush information may include: the corresponding relation between at least one first service and at least one fourth storage duration, where the fourth storage duration may be a duration of storing, by the first communication device, the first service (data related to the first service) in a corresponding cache, and the first service may be a service on a side downlink.

For example, assuming that the first transmission is a transmission corresponding to the first service 1, the buffer empty information includes: the duration of the first transmission stored in the corresponding buffer by the first communication device may be the fourth storage duration 1 if the first service 1 corresponds to the fourth storage duration 1 and/or the first service 2 corresponds to the fourth storage duration 2.

Or, alternatively, the cache flush information may include: the correspondence between the at least one resource pool and the at least one fifth holding time period may be a time period during which the first communication device holds data of the first resource pool (data related to the first resource pool) in the corresponding cache.

Optionally, the at least one resource pool comprises a resource pool to which the resources carrying the first transmission belong.

For example, assuming that the resource pool to which the resource carrying the first transmission belongs is resource pool 1, the buffer flush information includes: the duration of the first transmission stored in the corresponding buffer by the first communication device may be the fifth storage duration 1 if the resource pool 1 corresponds to the fifth storage duration 1 and/or the resource pool 2 corresponds to the fifth storage duration 2.

Or, alternatively, the cache flush information may include: correspondence between at least one sidelink resource and at least one sixth save duration, where the sixth save duration may be a duration in which the first communication device saves data of the sidelink resource (data related to the sidelink resource) in the corresponding buffer, and the sidelink resource may include a resource that carries the first transmission.

For example, the side-uplink resource may be a PSSCH, which is not limited in this application.

Illustratively, assuming that the first communication device sends a first transmission to the second communication device on side uplink resource 1, buffering the flush information includes: the duration of the first transmission stored by the first communication device in the corresponding buffer may be the sixth storage duration 1 if the side uplink resource 1 corresponds to the sixth storage duration 1 and/or the side uplink resource 2 corresponds to the sixth storage duration 2.

Or, alternatively, the cache flush information may include: correspondence of at least one side-link connection with at least one seventh save duration, which may be a duration in which the first communication device saves data of the side-link connection (data related to the side-link connection) in the corresponding cache.

For example, the side-link connection may be a connection between the first communication device and another terminal device, or a PC5 connection, such as a connection between the first communication device and a second communication device.

Illustratively, assuming that the first transmission is a transmission corresponding to the side-uplink connection 1, the buffered flush information includes: the duration of the first transmission stored by the first communication device in the corresponding buffer may be the seventh storage duration 1 if the side-link connection 1 corresponds to the seventh storage duration 1 and/or the side-link connection 2 corresponds to the seventh storage duration 2.

Optionally, similar to the above-mentioned correspondence between the at least one first transmission and the at least one first storage duration, the at least one second communication device and the at least one second storage duration may be in a one-to-one correspondence, or one-to-many, or many-to-one, and similarly, the at least one side-uplink connection and the at least one seventh storage duration may be in a one-to-one correspondence, or one-to-many, or many-to-one, which is not set forth herein.

Alternatively, the cache flush information may be pre-configured, or pre-defined, or determined by the first communication device, or the cache flush information may be from a network device to which the first communication device belongs.

Taking the first communication device as an example, the first information is determined according to the first resource information. For example, assuming that the first resource information indicates that the time domain position of the feedback resource corresponding to the first transmission is time 1, the first communication device may indicate time 1 or any time before time 1 according to the first information determined by the first resource information; or, the first information may indicate a duration 1, where the duration 1 is equal to or less than the time 1-time 2, assuming that the time domain position of the resource carrying the first transmission is time 2. This may apply in case the first communication device is operating in the scheduled resource allocation mode.

The first information determined from the first resource information and the first processing information may indicate time 1-duration k, or any time before (time 1-duration k), or the first information may indicate time 1-duration k, or any time before (time 1-duration k).

Therefore, the time of the first resource determined by the second communication equipment according to the first information is earlier than the time of the feedback resource corresponding to the first transmission, so that the first retransmission feedback information sent by the second communication equipment on the determined first resource (feedback resource) cannot be invalid at the first communication equipment, and the resource utilization rate can be improved.

For example, the first information may be determined according to an interval between a time of the PUCCH corresponding to the first transmission and a time of the PSSCH.

Taking the first communication device as an example, the first communication device determines the first information according to the buffer emptying information. For example, assuming that the buffer empty information indicates that the first communication device stores the duration of the first transmission in the corresponding buffer as duration 2, the first communication device may indicate time 3 or any time before time 3 according to the first information determined by the buffer empty information, where time 3=time 2+duration 2, and time 2 is a time domain position of a resource carrying the first transmission; alternatively, the first information may indicate a duration of 2 or any duration less than 2. This may be applicable to the case where the first communication device is operating in the scheduled resource allocation mode, as well as to the case where the first communication device is operating in the autonomous resource selection mode.

The first information determined according to the cache flush information and the second processing information may indicate a time 3-duration q, or any time before (time 3-duration q), or the first information may indicate a time 2-duration q, or any time before (time 2-duration q).

Therefore, the time of the first resource determined by the second communication equipment according to the first information is earlier than the time of the first communication equipment for emptying the buffer corresponding to the first transmission, so that the first retransmission feedback information sent by the second communication equipment on the determined first resource cannot be invalid at the first communication equipment, and the resource utilization rate can be improved.

Taking the first communication device as an example, the first communication device determines the first information according to the first resource information and the buffer emptying information. This may apply in case the first communication device is operating in the scheduled resource allocation mode.

Illustratively, assuming that the latest time determined by the first communication device according to the first resource information (or according to the first resource information and the first processing information) (the latest time when the first communication device expects the first retransmission feedback information corresponding to the first transmission to reach the first communication device) is time 1, the latest time determined by the first communication device according to the buffer flush information (or according to the buffer flush information and the second processing information) is time 3, the time earlier in time may be selected as the final latest time. For example, assuming that time 1 is before time 3 in time, then the final latest time is time 1, then the first information may indicate time 1 or any time before time 1.

Further, as an example, assuming that the maximum duration (the maximum duration that the first communication device waits to receive the first retransmission feedback information corresponding to the first transmission) determined by the first communication device according to the first resource information (or according to the first resource information and the first processing information) is a duration 1, the maximum duration that the first communication device determines according to the buffer flush information (or according to the buffer flush information and the second processing information) is a duration 2, a duration shorter may be selected as a final maximum duration. For example, assuming that duration 1 is less than duration 2 in time, then the final maximum duration is duration 1, then the first information may indicate duration 1 or any duration less than duration 1.

Optionally, the determining, by the first communication device, the first information according to the resource information and the cache empty information may include: the first communication device determines the first information according to a time of the feedback resource corresponding to the first transmission and a time which is more front in time among the time of the first communication device emptying the buffer corresponding to the first transmission.

For example, assuming that the time domain position of the feedback resource corresponding to the first transmission is indicated by the first resource information to be time 1, the time when the buffer empty information indicates that the first communication device empties the buffer corresponding to the first transmission is time 4, and assuming that time 1 is before time 4, the first communication device determines the first information according to time 1, and the determined first information may indicate time 1 or any time before time 1.

Therefore, the time of the first resource determined by the second communication device according to the first information is earlier than the time of the first communication device for emptying the buffer corresponding to the first transmission and earlier than the time of the feedback resource corresponding to the first transmission, so that the first retransmission feedback information sent by the second communication device on the determined first resource cannot be invalid at the first communication device, and the resource utilization rate can be improved.

Optionally, the first communication device determines the first information according to a time of the feedback resource corresponding to the first transmission and a time which is more temporally before a time of the first communication device emptying the buffer corresponding to the first transmission, and corresponding processing information.

The first communication device determines the first information from the first resource information and the first processing information, assuming that the time of the first transmission of the corresponding feedback resource is earlier in time. Assuming that the moment when the first communication device empties the buffer corresponding to the first transmission is earlier in time, the first communication device determines the first information according to the buffer empties information and the second processing information.

In another possible design manner, S301 may include: the first communication device obtains first information.

For example, the first information may be determined by the third communication device. The specific implementation manner of determining the first information by the third communication device may refer to the first communication device to determine the first information, which is not described herein.

Alternatively, the third communication device may transmit the first information by transmitting an RRC message, a MAC Control Element (CE), or downlink control information (downlink control information, DCI) to the first communication device.

In one possible design manner, the method provided by the embodiment of the application may further include: s305, the first communication device sends a first transmission to the second communication device. Accordingly, the second communication device receives the first transmission from the first communication device.

Alternatively, the present application does not limit the execution order of S305 described above, for example, S305 may be executed before or after S301 described above, or S305 may be executed simultaneously with S302 described below, and the illustration is executed before S301 described above with S305 in fig. 3.

S302, the first communication device indicates the first information to the second communication device.

Therefore, the first communication equipment indicates the first information to the second communication equipment, so that the second communication equipment can determine the first resource according to the first information, the first retransmission feedback information sent by the second communication equipment on the determined first resource can not be invalid at the first communication equipment, and the resource utilization rate can be improved.

In one possible design, the step S302 may include: the first communication device transmits the first information to the second communication device.

Alternatively, the first communication device may transmit the first information by sending an RRC message, MAC CE, or side-uplink control information (sidelink control information, SCI) to the second communication device.

In another possible design, the step S302 may include: the first communication device transmits the second information to the second communication device. Accordingly, the second communication device receives the second information from the first communication device.

Alternatively, the second information may indicate a channel access priority level.

Alternatively, the first communication device may transmit the second information by sending an RRC message, MAC CE, or SCI to the second communication device.

Optionally, the channel access priority level CAPC corresponds to the first information.

That is, the first communication device may indicate the first information by transmitting the channel access priority level.

For example, the correspondence of the channel access priority level with the first information may be preconfigured, predefined, determined by the first communication device, or from a third communication device.

In one possible design, the step S302 may include: the first communication device indicates the first information to the second communication device in the case where the first condition is satisfied.

Optionally, the first condition may include one or more of: the first communication device obtains the buffer flushing information, the first communication device operates in a scheduled resource allocation mode and obtains the first resource information, the first communication device does not share resources of the first communication device to the second communication device, and resources of the second communication device that send the first retransmission feedback information to the first communication device are not determined by the first communication device.

Illustratively, the first communication device obtaining the cache flush information may include: the first communication device operates in an autonomous resource selection mode and obtains cache flush information, or the first communication device operates in a scheduled resource allocation mode and obtains cache flush information.

For example, the first communication device obtaining cache flush information may refer to: the method comprises the steps that buffer emptying information is obtained through pre-configuration, or obtained through pre-definition, and is determined by the first communication device, or buffer emptying information from network devices to which the first communication device belongs is received.

In this way, in the case that the first communication device obtains the cache flush information, the first communication device indicates the first information to the second communication device, so that the second communication device determines the first resource according to the first information.

Illustratively, the first communication device obtaining the first resource information may include: the first communication device operates in a scheduled resource allocation mode and obtains first resource information.

In this way, in the case where the first communication device operates in the scheduled resource allocation mode and obtains the first resource information, the first communication device indicates the first information to the second communication device, causing the second communication device to determine the first resource according to the first information.

Optionally, the first communication device does not share the resource of the first communication device to the second communication device, which may include: the first communication device does not share the COT of the first communication device with the second communication device.

Alternatively, the resources of the first communication device may include the COT (resource) determined by the first communication device.

In this way, in the case where the second communication device does not share the resources of the first communication device, the first communication device indicates the first information to the second communication device, causing the second communication device to determine the first resources according to the first information.

Optionally, the resource of the second communication device to send the first retransmission feedback information to the first communication device is not determined by the first communication device.

For example, the second communication device transmitting the first retransmission feedback information to the first communication device may indicate that the first communication device is not transmitting the first retransmission feedback information: the method includes determining, by a second communication device, resources for the second communication device to send first retransmission feedback information to a first communication device.

In this way, in the case where it is determined that the resource of the second communication device that transmits the first retransmission feedback information to the first communication device is determined by the second communication device, the first communication device indicates the first information to the second communication device, causing the second communication device to determine the first resource according to the first information.

In one possible design manner, the method provided by the embodiment of the application may further include: the first communication device starts a first timer when the first communication device indicates first information to the second communication device.

Alternatively, the value or duration of the first timer may be determined by the first communication device according to the first information.

For example, the first communication device may start the first timer when transmitting the first information to the second communication device. Alternatively, the first communication device may start the first timer when sending the second information to the second communication device.

For example, the duration (or value) of the first timer is less than or equal to the first duration indicated by the first information, or the duration (or value) of the first timer is less than or equal to the difference between the first time instant (indicated by the first information) and a second time instant, the second time instant being the time domain location of the resource carrying the first transmission.

Alternatively, the first timer may correspond to the first transmission, or the first timer may correspond to a process (including the first transmission), a second communication device, traffic, a resource pool, or a side-uplink resource.

Alternatively, the first communication device may send the value or duration of the first timer to the second communication device.

Alternatively, the present application does not limit the execution timing at which the first communication device may send the value or the duration of the first timer to the second communication device, and may be executed before or simultaneously with the first communication device indicating the first information to the second communication device.

S303, the second communication device determines the first information.

In one possible design, the step S303 may include: the second communication device receives the first information from the first communication device. The above S302 may be optional.

As such, the first information may be directly transmitted by the first communication device.

In another possible design, the step S303 may include: the second communication device determines the first information according to the second information and the corresponding relation information.

Optionally, the correspondence information may indicate a correspondence between at least one first information, at least one channel access priority class, and/or at least one resource pool.

For example, the correspondence information may indicate a correspondence between at least one first information and at least one channel access priority class.

For example, there may be a one-to-one correspondence, or one-to-many, between at least one first information and at least one channel access priority level.

That is, different channel access priority levels may correspond to different first information, or different sets of channel access priority levels may correspond to different first information.

In this way, the second communication device may obtain the first information corresponding to the channel access priority level directly according to the channel access priority level and the correspondence between the at least one first information and the at least one channel access priority level.

In some embodiments, the determining, by the second communication device, the first information according to the second information and the correspondence information may include: the second communication device determines the first information according to the second resource information, the second information and the corresponding relation information.

Alternatively, the second resource information may indicate a resource carrying the first transmission, or a resource pool to which a resource for transmitting the second information belongs.

For example, the correspondence information may indicate a correspondence between at least one first information, at least one channel access priority class, and at least one resource pool.

Alternatively, the at least one resource pool may comprise a resource pool to which a resource carrying the first transmission belongs, or a resource pool to which a resource for transmitting the second information belongs.

For example, the correspondence between the at least one first information and the at least one channel access priority class is referred to as a first correspondence, and the at least one first correspondence corresponds to the at least one resource pool.

For example, the at least one first correspondence relationship corresponds to the at least one resource pool one-to-one, which is not limited.

For example, assuming that the second resource information indicates the resource pool 1, the second communication device obtains a first corresponding relationship corresponding to the resource pool 1 from a corresponding relationship between at least one first corresponding relationship and at least one resource pool, and obtains first information corresponding to the channel access priority indicated by the second information according to the channel access priority indicated by the second information and the first corresponding relationship corresponding to the resource pool 1.

Alternatively, the second resource information may be from the first communication device, or the second resource information may be determined by the second communication device.

Illustratively, the method provided by the embodiment of the application may further include: the first communication device transmits the correspondence information to the second communication device. Accordingly, the second communication device receives the correspondence information from the first communication device.

Alternatively, the correspondence information may be preconfigured or predefined, or the correspondence information may be determined by the first communication device or from the third communication device.

For example, the third communication device transmits the correspondence information to the first communication device, and accordingly, the first communication device receives the correspondence information from the third communication device.

For example, the third communication device may transmit the correspondence information by transmitting DCI, an RRC message, or a MAC CE to the first communication device.

For example, the correspondence information in the first communication device may be preconfigured or predefined, or the correspondence information may be determined by the first communication device or from a third communication device.

Alternatively, the first communication device may transmit the correspondence information by sending an RRC message, MAC CE, or SCI to the second communication device.

Alternatively, the first communication device sending the second information to the second communication device, the first communication device sending the correspondence information to the second communication device, and the first communication device sending the second resource information to the second communication device may be performed in the same step, or may be separately performed, which is not limited in this application.

Optionally, the third communication device transmits the second information to the first communication device, and accordingly, the first communication device receives the second information from the third communication device.

For example, the third communication device may transmit the second information by transmitting DCI, an RRC message, or a MAC CE to the first communication device.

In some embodiments, the determining, by the second communication device, the first information according to the second information and the correspondence information may include: the second communication device determines the first information according to the second information, the corresponding relation information and the third information.

Alternatively, the third information may indicate identification information of the correspondence relationship, or the third information may indicate information of the correspondence relationship used by the second communication device.

For example, the third information may indicate information or identification information of a correspondence that the first communication device expects or recommends for use by the second communication device. This may facilitate the second communication device in determining which correspondence to employ.

For example, assuming that there are a plurality of correspondence between at least one first information and at least one channel access priority class, the third information may indicate an identification of the correspondence that the first communication device expects the second communication device to use.

For example, assume that the correspondence information includes a first correspondence 1 and a first correspondence 2, the third information indicates an identifier of the first correspondence 1, the second communication device obtains the first correspondence 1 according to the correspondence information and the third information, and obtains first information corresponding to a channel access priority indicated by the second information according to the first correspondence 1 and the second information.

For example, the first communication device transmits the third information to the second communication device. Accordingly, the second communication device receives the third information from the first communication device.

Alternatively, the first communication device sending the second information to the second communication device, the first communication device sending the correspondence information to the second communication device, and the first communication device sending the third information to the second communication device may be performed in the same step, or may be separately performed, which is not limited in this application.

S304, the second communication device determines the first resource according to the first information.

The first resource may be used for the second communication device to send the first retransmission feedback information to the first communication device.

In this way, the second communication device may determine the first resource according to the first moment or the first moment when the first communication device expects the first retransmission feedback information corresponding to the first transmission, or the first duration when the first communication device waits for receiving the first retransmission feedback information corresponding to the first transmission, so that the first retransmission feedback information sent by the second communication device on the determined feedback resource will not fail at the first communication device, and the resource utilization rate may be improved.

Optionally, the time corresponding to the first resource is before or is the first time, or a time interval between the time of the first transmission and the first resource is less than or equal to the first duration.

For example, the time of the first transmission may refer to the time at which the second communication device receives, or receives, the first transmission, or to the start time or the stop time at which the second communication device receives the first transmission.

For example, if the first time is the latest time, the time corresponding to the first resource is before the first time indicated by the first information, and if the first time is the time before the latest time, the time corresponding to the first resource may be before the first time indicated by the first information or be the first time.

For another example, if the first time is the latest time, the time corresponding to the first resource may be before or at the first time indicated by the first information, and if the first time is the time before the latest time, the time corresponding to the first resource may be before or at the first time indicated by the first information.

For example, if the first duration is the maximum duration, a time interval between a time of the first transmission and the time domain location of the first resource is less than the first duration. If the first duration is a duration less than the maximum duration, a time interval between a time of the first transmission and the time domain location of the first resource may be less than or equal to the first duration.

For another example, if the first duration is the maximum duration, a time interval between a time of the first transmission and the time domain location of the first resource is less than or equal to the first duration. If the first duration is a duration less than the maximum duration, a time interval between a time of the first transmission and the time domain location of the first resource may be less than or equal to the first duration.

Therefore, the time of the first resource determined by the second communication device according to the first information is earlier than the time of the uplink resource and/or the time of the first communication device for emptying the buffer corresponding to the first transmission, so that the first retransmission feedback information sent by the second communication device on the determined first resource cannot be invalid at the first communication device, the first resource can be prevented from being wasted, and the resource utilization rate can be improved.

In one possible design, the step S304 may include the following steps a to b.

And a step a, the second communication device determines the time domain range of the resource selection window based on the autonomous resource selection mode according to the first information.

Alternatively, the time domain range of the resource selection window may include: the time period between the starting time of the resource selection window and the ending time of the resource selection window.

Illustratively, the expiration time of the resource selection window may be the first time or any time before the first time.

For example, the starting time of the resource selection window may be the time of the first transmission, or the starting time of the resource selection window may be any time between the time of the first transmission and a third time, which may be determined according to the sum of the time of the first transmission and the first time.

For example, the cutoff time of the resource selection window may be the third time, or the cutoff time of the resource selection window may be any time between the start time of the resource selection window and the third time.

And b, the second communication equipment determines the first resource according to the time domain range.

Illustratively, the second communication device may select the first resource from the resources corresponding to the time domain range.

Therefore, the second communication device selects the first resource from the corresponding resources at or before the expiration time of the resource selection window, so that the first retransmission feedback information sent by the second communication device on the determined first resource can not be invalid at the first communication device, and the resource utilization rate can be improved.

In another possible design, the step S304 may include: and c, the second communication equipment determines a first resource from the resources of the second communication equipment according to the first information.

The method is applicable to a scheduling resource allocation mode and an autonomous resource selection mode.

For example, the second communication device may select a first resource from the resources of the second communication device, where the time corresponding to the first resource is before the first time indicated by the first information.

Or, illustratively, the second communication device determines the first resource from the resources of the second communication device according to the first information and the time when the second communication device receives the first transmission, and a time interval between the time when the second communication device receives or receives the first transmission and the first resource is less than the first duration.

Alternatively, the resources of the second communication device may include the COT determined by the second communication device. The COT is determined, for example, by a type 1 channel access scheme.

Illustratively, the first resource may be a PSFCH resource.

Alternatively, the first resource may be located in an unlicensed spectrum, which is not limited in this application.

Alternatively, the resources referred to herein may be located in unlicensed spectrum or licensed spectrum, which is not limited in this application.

In one possible design manner, the method provided by the embodiment of the application may further include: when the second communication device determines the first information, the second communication device starts the first timer.

Alternatively, the value or duration of the first timer may be determined by the second communication device according to the first information.

Alternatively, the value or duration of the first timer may be received by the second communication device from the first communication device.

For the specific implementation of the first timer, reference may be made to the corresponding description in S302, which is not repeated here.

The second communication device may, for example, start the first timer upon receipt of the first information from the first communication device. Alternatively, the second communication device may start the first timer upon receipt of the second information from the first communication device.

In some embodiments, S304 may include: the second communication device determines a first resource based on the first information and the first timer.

Illustratively, the second communication device determines the first resource from the first information while the first timer is running. The second communication device does not determine the first resource when the first timer expires.

Alternatively, the second communication device may perform the above steps a to b or may perform the above step c while the first timer is running.

Optionally, the second communication device may determine, according to the first timer, whether the first retransmission feedback information sent by the second communication device on the determined first resource will fail at the first communication device.

Thus, when the first timer runs, the second communication device determines the first resource according to the first information, and the first retransmission feedback information sent by the second communication device on the determined first resource is not invalid at the first communication device. When the first timer times out, the first retransmission feedback information sent by the second communication device on the determined first resource fails at the first communication device, so that the first resource is uncertain, the first retransmission feedback information is not sent, and resource waste can be further avoided.

In one possible design manner, S304 may include: and under the condition that the second condition is met, the second communication device determines the first resource according to the first information.

Optionally, the second condition may include: the second communication device receives the fourth information from the first communication device and/or the second communication device performs listen before talk LBT failure on the feedback resource corresponding to the first transmission, either pre-configured or indicated by the first communication device.

Alternatively, the fourth information may indicate resources for determining by the second communication device that the second communication device sent the first retransmission feedback information to the first communication device, or indicate that the first communication device does not share resources of the first communication device with the second communication device.

For example, the fourth information may indicate that the first communication device does not share the first communication device with the second communication device.

For example, the resources of the first communication device may include the determined COT.

Alternatively, the feedback resource may be a PSFCH, which is not limited in this application.

For example, the second communication device performs listen before talk failure on the feedback resource corresponding to the first transmission and configured or indicated by the first communication device, which may mean that the second communication device listens for the feedback resource corresponding to the first transmission and configured or indicated by the first communication device, and the listening result is not idle, which may refer to the above description of the LBT failure. The LBT fails, and the preconfigured feedback resource corresponding to the first transmission or the feedback resource indicated by the first communication device cannot be used, so that the second communication device can determine the resource of the second communication device for sending the first retransmission feedback information to the first communication device.

Therefore, after the second communication device receives the fourth information or LBT failure, the first resource is determined according to the first information, so that the resource utilization rate can be improved.

In one possible design manner, the method provided by the embodiment of the application may further include: s306, the second communication device adopts the first resource to send the first retransmission feedback information to the first communication device. Accordingly, the first communication device receives the first retransmission feedback information from the second communication device.

Optionally, when the first timer runs, the second communication device uses the first resource to send the first retransmission feedback information to the first communication device. And when the first timer expires, the second communication device does not send the first retransmission feedback information. In this way, the LBT snoop power consumption of the first resource may be reduced.

In some embodiments, the method provided in the embodiments of the present application may further include: the first communication device determines whether the first communication device sends second retransmission feedback information corresponding to the first transmission to the third communication device or whether the first retransmission feedback information is ignored or retransmission resources are determined according to whether the first timer is running, whether the first timer is overtime and/or the arrival time of the first retransmission feedback information corresponding to the first transmission.

Alternatively, the uplink resource may be an uplink resource corresponding to the first transmission.

For example, the uplink resource may be PUCCH, which is not limited in this application.

In an exemplary embodiment, if the first communication device receives the first retransmission feedback information corresponding to the first transmission when the first timer is running, and the first communication device operates in the scheduling resource allocation mode, the first communication device sends the second retransmission feedback information corresponding to the first transmission to the third communication device through the uplink resource. For example, the first retransmission feedback information corresponding to the first transmission may include a NACK or an ACK.

In an exemplary embodiment, if the first communication device receives the first retransmission feedback information from the second communication device when the first timer is running, the first communication device operates in the autonomous resource selection mode, and the first retransmission feedback information corresponding to the first transmission includes NACK, the first communication device triggers resource selection or reselection based on the autonomous resource selection mode, and sends retransmission information corresponding to the first retransmission feedback information to the second communication device by using the retransmission resource. If the first retransmission feedback information corresponding to the first transmission includes ACK, the first communication device does not trigger resource selection or reselection.

For example, if the first communication device receives the first retransmission feedback information from the second communication device when or after the first timer expires, the first communication device ignores the first retransmission feedback information. Even if the first retransmission feedback information includes NACK, retransmission resources are not requested to the third communication device, resource selection or reselection based on the autonomous resource selection mode is not triggered, and power consumption can be reduced. This applies to the first communication device operating in the scheduled resource allocation mode as well as in the autonomous resource selection mode.

For example, if the first timer expires, the first communication device empties the buffer corresponding to the first transmission, or empties the buffer of the process occupied by the first transmission.

For example, if the first communication device does not receive the first retransmission feedback information from the second communication device when the first timer expires, the first communication device determines retransmission resources.

In some embodiments, the determining, by the first communication device, retransmission resources may include: the first communication device requests retransmission resources from the third communication device.

For example, if the first communication device is operating in the scheduled resource allocation mode, the first communication device requests retransmission resources from the third communication device.

For example, the first communication device sends a NACK to the third communication device requesting retransmission resources.

In other embodiments, the determining, by the first communication device, retransmission resources may include: the first communication device triggers a resource selection or reselection based on an autonomous resource selection mode.

For example, if the first communication device is operating in an autonomous resource selection mode, the first communication device triggers a resource selection or reselection based on the autonomous resource selection mode.

That is, the first communication device may determine the retransmission resource according to the current resource selection mode.

Based on the communication method shown in fig. 3, the first communication device determines and indicates, to the second communication device, information (first information) for determining a time of feeding back the resource, where the first information indicates a first time when the first communication device expects the first retransmission feedback information corresponding to the first transmission to reach the first communication device, or indicates a first duration for which the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information for the second communication device to send the first retransmission feedback information to the first communication device, and the second communication device determines the first resource according to the first information, where the first resource is used for the second communication device to send the first retransmission feedback information to the first communication device. In this way, the first communication device controls the time range of the feedback resource (first resource), so that the first retransmission feedback information sent by the second communication device on the determined feedback resource cannot be invalid at the first communication device, and the resource utilization rate can be improved.

Fig. 4 is a schematic flow chart of another communication method according to an embodiment of the present application. Fig. 4 provides a scheme for sharing resources between terminal devices, taking a first communication device to share resources determined by the first communication device to a second communication device as an example. The method shown in fig. 4 may be used in combination with the method shown in fig. 3. In connection with fig. 1, the first communication device in fig. 4 may be a transmitting terminal, and the second communication device may be a receiving terminal. Alternatively, the first communication device may be a receiving terminal and the second communication device may be a transmitting terminal.

As shown in fig. 4, the communication method includes the steps of:

s401, the second communication device sends first request information to the first communication device. Accordingly, the first communication device receives the first request information from the second communication device.

Illustratively, the first request information may be used to request sharing of resources of the first communication device.

Alternatively, the first request information may be used to request sharing of resources of the first communication device, for example.

Alternatively, the resources of the first communication device may include the COT determined by the first communication device.

For example, the first request information may be used for the second communication device to request sharing of the COT determined by the first communication device with the first communication device.

Illustratively, the first request information may include, but is not limited to, one or more of the following: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information.

Alternatively, the information of the data to be transmitted may include, but is not limited to: quality of service information, packet delay budget information, remaining packet delay budget information, and/or the size of the data to be transmitted.

Illustratively, the quality of service (quality of service, qoS) information may include, but is not limited to, one or more of the following: priority, data rate, throughput, reliability, jitter, and packet error rate.

For example, the packet delay budget information may indicate a packet delay budget for data to be transmitted.

Illustratively, the remaining (remaining) packet delay budget (packet delay budget, PDB) information may indicate a remaining packet delay budget for the data to be transmitted.

The size of the data to be transmitted may also be traffic, for example.

Alternatively, the identification of the second communication device may be a source (source) identification.

Optionally, the identifier of the fourth communication device may be a destination (destination) identifier corresponding to the fourth communication device.

For example, the number of fourth communication devices may be one or more.

Alternatively, the fourth communication device may request a receiving device for the second communication device to transmit resources.

The second communication device requests that the resource sharing the first communication device send a transmission to the fourth communication device.

Optionally, the second communication device requests the resource sharing the first communication device to send the data to be sent to the fourth communication device.

Alternatively, the resource scheduling mode adopted by the second communication device may be a scheduling resource allocation mode or an autonomous resource selection mode.

For example, the resource scheduling mode adopted by the second communication device is a scheduling resource allocation mode, and may implicitly indicate that the second communication device does not share the resources of the first communication device with communication devices other than the first communication device, e.g., implicitly indicate that the second communication device does not share the COT determined by the first communication device with communication devices other than the first communication device.

In this way, if the first communication device shares a part of the resources in the COT determined by the first communication device with the second communication device, the remaining resources in the COT cannot be used by communication devices other than the first communication device.

For example, the resource scheduling mode employed by the second communication device is an autonomous resource selection mode, which may implicitly indicate that the second communication device may share (or agree to) resources of the first communication device with communication devices other than the first communication device, e.g., implicitly indicate that the second communication device may share the COT determined by the first communication device with communication devices other than the first communication device.

In this way, if the first communication device shares a part of the resources in the COT determined by the first communication device with the second communication device, the remaining resources in the COT may be used by communication devices other than the first communication device.

Alternatively, the other communication device may employ the shared resources of the first communication device for sidelink communication.

Alternatively, the sharing indication information may be used to indicate whether or not to share the resource of the first communication device with communication devices other than the first communication device.

For example, the sharing indication information may indicate that the second communication device does not share the resources of the first communication device with communication devices other than the first communication device.

For example, the sharing indication information may indicate that the second communication device does not share the COT determined by the first communication device with communication devices other than the first communication device. In this way, the first communication device may share a part of the resources in the COT determined by the first communication device to the second communication device, and may not use the remaining resources in the COT to communication devices other than the first communication device.

For example, the sharing indication information may indicate that the second communication device shares resources of the first communication device with communication devices other than the first communication device.

For example, the sharing indication information may indicate that the second communication device may share (or agree to) the COT determined by the first communication device with communication devices other than the first communication device. In this way, the first communication device may share a part of the resources in the COT determined by the first communication device to the second communication device, and may also use the remaining resources in the COT to communication devices other than the first communication device.

In some embodiments, the method provided in the embodiments of the present application may further include: the first communication device starts a second timer when the first communication device receives first request information from the second communication device.

Alternatively, the value or duration of the second timer may come from the second communication device.

For example, the second communication device transmits the value or duration of the second timer to the first communication device. Accordingly, the first communication device receives the value or duration of the second timer from the second communication device.

Alternatively, the value or duration of the second timer may be determined by the second communication device according to the latency requirement of the data to be transmitted.

For example, the value of the second timer is less than or equal to the delay indicated in the delay requirement.

S402, the first communication device sends resource sharing information to the second communication device. Accordingly, the second communication device receives the resource sharing information from the first communication device.

For example, the resource sharing information may be used to indicate information of a second resource shared by the first communication device to the second communication device.

For example, the second resource may be a segment of a resource in the COT determined by the first communication device.

Optionally, the resource sharing information may include one or more of: the location of the second resource, the channel access mode, and the channel access priority.

Illustratively, the location of the second resource may include a time-frequency domain location of the second resource. For example, the location information of the second resource may include a location of the second resource in the COT determined by the first communication device.

Illustratively, the channel access manner includes: type 2C channel access, type 2A channel access, and type 2B channel access.

Illustratively, the channel access priority level may be represented by 1 to 10, e.g., a channel access priority level of 1 indicates the highest priority.

In some embodiments, the resource sharing information may be determined by the first communication device from the first request information.

Alternatively, the first communication device may determine which segment of resources is allocated to the second communication device based on the information of the data to be transmitted.

For example, assuming that there are a plurality of second communication devices requesting sharing of the resources of the first communication device from the first communication device, when the resources of the first communication device are small (relative to the resource requirements of the plurality of second communication devices requesting sharing), the first communication device may select a part of the second communication devices from the plurality of second communication devices to share the resources.

For example, the first communication device may determine to which second communication device the resources of the first communication device are preferentially shared according to the priority level in the service quality information, the size of the remaining PDB, and/or the size of the data to be transmitted, which correspond to the plurality of second communication devices, respectively.

For example, if the priority in the service quality information corresponding to the second communication device is high, the resource is preferentially shared to the second communication device.

For example, if the remaining PDBs corresponding to the second communication device are smaller, the resources are preferentially shared to the second communication device.

For example, according to the size of the data to be transmitted corresponding to the second communication device, the resources may be shared to which second communication devices considering that the resources are fully utilized. In this way, the resource utilization can be improved.

For example, the first communication device may determine whether to share the resource of the first communication device to the other communication device according to the sharing indication information.

For example, assuming that there are a plurality of second communication devices requesting to share the resources of the first communication device from the first communication device, the first communication device may determine whether to share the COT determined by the first communication device to the plurality of second communication devices.

In one possible design, the step S402 may include: the first communication device determines to send the resource sharing information to the second communication device according to the second timer.

If the second timer does not timeout, the first communication device sends the resource sharing information to the second communication device, which can meet the time delay requirement of the data to be sent and ensure the reliability of the side uplink communication.

For example, if the second timer expires, the first communication device ignores or cancels sending the resource sharing information, which can avoid wasting resources.

In some embodiments, the method provided in the embodiments of the present application may further include: the first communication device stops running the second timer when generating the resource sharing information through a multiplexing & packetizing (multiplexing & packetizing) process.

That is, the first communication device may stop running the second timer and transmit the resource sharing information when the resource sharing information is being transmitted when the resource sharing information is generated.

In some embodiments, the method provided in the embodiments of the present application may further include: when the first communication device generates the resource sharing information, the first communication device cancels the transmission of the resource sharing information.

Optionally, the method provided by the embodiment of the application may further include: the second communication device sends data to be sent to the fourth communication device on the second resource. Accordingly, the fourth communication device receives data to be transmitted from the second communication device.

Based on the method shown in fig. 4, the first communication device receives first request information from the second communication device, the first request information being for requesting sharing of resources of the first communication device, the first request information including one or more of: the method comprises the steps that information of data to be sent, identification of second communication equipment, identification of fourth communication equipment, a resource scheduling mode adopted by the second communication equipment and sharing indication information are included, the first communication equipment sends resource sharing information to the second communication equipment, and the resource sharing information is used for indicating the first communication equipment to share information of second resources to the second communication equipment, so that the first communication equipment can share the resources to the second communication equipment.

In one possible design, the first communication device may send the resource sharing information based on multicasting, and the second communication device receives the resource sharing information.

For specific implementation of the shared resource, reference may be made to the corresponding description in the method shown in fig. 4, which is not repeated here.

Alternatively, the first communication device may send the SCI based on multicast, the SCI including the resource sharing information.

Optionally, the SCI may also include multicast destination information.

Optionally, the multicast destination information may include an identifier corresponding to the multicast service. The identifier corresponding to the multicast service may include a destination identifier corresponding to the multicast service.

In this way, the first communication device may autonomously share resources to the second communication device by multicast. The main difference from the method shown in fig. 4 is that the first communication device may actively share resources to the second communication device in case the second communication device does not request to share resources.

Optionally, any communication device belonging to a certain multicast group may send resource sharing information to other communication devices in the multicast group, sharing resources.

For example, the second communication device and the one or more fourth communication devices may belong to the same multicast group.

Optionally, the second communication device receives the resource sharing information, and may send the resource sharing information to any fourth communication device in the multicast group.

In another possible design, the first communication device may send the resource sharing information to the second communication device based on unicast, the second communication device receiving the resource sharing information from the first communication device.

In this way, the first communication device may autonomously share resources to the second communication device in a unicast manner. The main difference from the method shown in fig. 4 is that the first communication device may actively share resources to the second communication device in case the second communication device does not request to share resources.

Fig. 5 is a schematic flow chart of still another communication method according to an embodiment of the present application. Fig. 5 provides a scheme for establishing a unicast link between terminal devices, taking a request from a second communication device to establish a unicast link as an example. In connection with fig. 1, the first communication device in fig. 5 may be a transmitting terminal, and the second communication device may be a receiving terminal. Alternatively, the first communication device may be a receiving terminal and the second communication device may be a transmitting terminal.

The method shown in fig. 5 may be used in combination with the method shown in fig. 4 described above, for example, the method shown in fig. 5 may be performed before the method shown in fig. 4. The method shown in fig. 5 may be used in combination with the above-described scheme in which the first communication device autonomously shares resources on a unicast basis, e.g. the method shown in fig. 5 may be performed before the first communication device transmits the resource sharing information to the second communication device on a unicast basis.

As shown in fig. 5, the communication method includes the steps of:

s501, the second communication device determines that the third condition is satisfied.

Illustratively, the third condition may include one or more of: the method includes determining that resources of a first communication device are needed or of interest or are configured to be shared, not having established a unicast link with the first communication device, obtaining resource sharing information for the first communication device, determining that a resource sharing request needs to be sent, and determining that the first communication device needs to be requested to share resources.

For specific implementation of the resource sharing information, reference may be made to the corresponding description in the method shown in fig. 4, which is not repeated here.

Alternatively, the resource sharing request may be the first request information in the method shown in fig. 4.

In one possible design manner, S501 may include: an Access Stratum (AS) of the second communication device determines that a third condition is satisfied.

That is, S501 described above may be performed by the access layer of the second communication device.

In some embodiments, the method provided in the embodiments of the present application may further include: the access layer of the second communication device sends fourth information and/or destination identification to the first protocol layer of the second communication device. Accordingly, the first protocol layer of the second communication device receives fourth information and/or destination identification from the access layer of the second communication device.

Alternatively, the first protocol layer may be a protocol layer above the access layer.

Illustratively, the first protocol layer may be a layer above the access layer, or any protocol layer above the access layer.

For example, the first protocol layer may be a V2X layer or a non-access stratum (NAS) layer, or the like.

Optionally, the fourth information may be used to indicate resources of the first communication device may be shared, to request sharing of resources of the first communication device, to indicate initiation of unicast link establishment with the first communication device, to indicate sharing of resources of communication devices other than the second communication device, or to indicate sharing of COT of communication devices other than the second communication device.

For example, if it is determined that the resource sharing information of the first communication device is satisfied, the fourth information may indicate that the resource of the first communication device may be shared.

For example, if it is determined that resources of the first communication device are needed or of interest or are configured to be shared, the fourth information may indicate that resources of the first communication device are requested to be shared.

For example, if a unicast link has not been established with the first communication device, the fourth information may indicate that establishment of a unicast link with the first communication device is initiated.

For example, if it is determined that a unicast link needs to be established, the fourth information may indicate that unicast link establishment is initiated.

For example, if it is determined that the resource sharing request needs to be transmitted, the fourth information may indicate sharing of resources of other communication devices (e.g., communication devices other than the second communication device) or indicate sharing of COT of other communication devices (e.g., communication devices other than the second communication device).

For example, if it is determined that the first communication device needs to be requested to share resources, the fourth information may indicate that the resources of the first communication device are shared.

Alternatively, the destination identifier may include an identifier of the first communication device, or a destination identifier corresponding to the first communication device. Illustratively, the second communication device may initiate a link establishment to the communication device to which the destination identification corresponds.

S502, the second communication device sends the second request information to the first communication device. Accordingly, the first communication device receives the second request information from the second communication device.

Illustratively, the second request information may be used to request establishment of a unicast link.

In this way, when the second communication device needs to share the resource from the first communication device, the first communication device is initiated to establish a unicast link, and the first communication device receives the second request information and establishes a unicast link with the second communication device.

In one possible design manner, S502 may include: the first protocol layer of the second communication device sends the second request information to the first communication device.

That is, S502 described above may be performed by the first protocol layer of the second communication device.

Alternatively, the second request information may be a first protocol layer message.

For example, the second request information may be a V2X message or a NAS message.

Based on the method shown in fig. 5, when the second communication device has a requirement of sharing resources, the unicast link between the second communication device and the first communication device is triggered, so that the reliability of the transmission of the first request information and/or the resource sharing information can be ensured.

Throughout this application, unless specifically stated otherwise, identical or similar parts between the various embodiments may be referred to each other. In the various embodiments and the various implementation/implementation methods in the various embodiments in this application, if no special description and logic conflict exist, terms and/or descriptions between different embodiments and between the various implementation/implementation methods in the various embodiments may be consistent and may be mutually referred to, technical features in the different embodiments and the various implementation/implementation methods in the various embodiments may be combined to form new embodiments, implementations, implementation methods, or implementation methods according to their inherent logic relationships. The above-described embodiments of the present application are not intended to limit the scope of the present application.

The communication method provided in the embodiment of the present application is described in detail above with reference to fig. 3 to 5. The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 6 to 9.

Fig. 6 is a schematic structural diagram of a communication device that may be used to implement the embodiments of the present application.

The communication apparatus 600 may be a first communication device or a second communication device, or may be a chip or other component having a corresponding function applied to the first communication device or the second communication device. As shown in fig. 6, the communication device 600 may include a processor 601. Optionally, the communication device 600 may also include one or more of a memory 602 and a transceiver 603. Wherein the processor 601 may be coupled to one or more of the memory 602 and the transceiver 603, e.g., via a communication bus connection, the processor 601 may also be used alone.

The following describes the respective constituent elements of the communication apparatus 600 in detail with reference to fig. 6:

the processor 601 is a control center of the communication device 600, and may be one processor or a collective term of a plurality of processing elements. For example, processor 601 is one or more central processing units (central processing unit, CPU), but may also be an integrated circuit (application specific integrated circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present application, such as: one or more microprocessors (digital signal processor, DSPs), or one or more field programmable gate arrays (field programmable gate array, FPGAs).

Among other things, the processor 601 may perform various functions of the communication device 600 by running or executing software programs stored in the memory 602 and invoking data stored in the memory 602.

In a particular implementation, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 6, as an embodiment.

In a specific implementation, as an embodiment, the communication device 600 may also include a plurality of processors, such as the processor 601 and the processor 604 shown in fig. 6. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more communication devices, circuitry, and/or processing cores for processing data (e.g., computer program instructions).

Alternatively, memory 602 may be, but is not limited to, read-only memory (ROM) or other type of static storage communication device capable of storing static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage communication device capable of storing information and instructions, but may also be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 602 may be integrated with the processor 601 or may exist separately and be coupled to the processor 601 through an input/output port (not shown in fig. 6) of the communication device 600, which is not specifically limited in this embodiment of the present application.

Illustratively, the input port may be used to implement one or more receive functions performed by the first communication device or the second communication device in any of the method embodiments described above, and the output port may be used to implement one or more transmit functions performed by the first communication device or the second communication device in any of the method embodiments described above.

The memory 602 may be used to store a software program for executing the embodiments of the present application, and is controlled by the processor 601 to execute the software program. The specific implementation manner may refer to the above method embodiment, and will not be described herein.

Optionally, a transceiver 603 is used for communication with other communication devices. For example, where the communications apparatus 600 is a first communications device, the transceiver 603 may be used for or a second communications device to communicate. For another example, when the communication apparatus 600 is a second communication device, the transceiver 603 may be used to communicate with the first communication device or the like.

In addition, the transceiver 603 may include a receiver and a transmitter (not separately shown in fig. 6). The receiver is used for realizing the receiving function, and the transmitter is used for realizing the transmitting function. The transceiver 603 may be integrated with the processor 601 or may exist separately and be coupled to the processor 601 through an input/output port (not shown in fig. 6) of the communication device 600, which is not specifically limited in this embodiment of the present application.

It should be noted that the structure of the communication device 600 shown in fig. 6 is not limited to the communication device, and an actual communication device may include more or fewer components than shown, or may combine some components, or may be different in arrangement of components.

The actions of the first communication device or the second communication device in fig. 3 to fig. 5 may be performed by the processor 601 in the communication apparatus 600 shown in fig. 6 by calling the application program code stored in the memory 602 to instruct the first communication device or the second communication device, respectively, which is not limited in this embodiment.

When the communication apparatus is a first communication device or a second communication device, the communication apparatus 600 may perform any one or more of the possible design manners related to the first communication device or the second communication device in the above method embodiments, respectively.

Fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in fig. 7, the communication apparatus 700 includes: the processing module 703 and the transmitting module 701 may further include a receiving module 702. For ease of illustration, fig. 7 shows only the main components of the communication device 700.

In the present embodiment, the communication apparatus 700 is presented in a form in which respective functional modules are divided in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate that the communication device 700 may take the form of the communication device 600 shown in fig. 6.

For example, the processor 601 in the communication apparatus 600 shown in fig. 6 may cause the communication method in the above-described method embodiment to be performed by calling computer-executable instructions stored in the memory 602.

In particular, the functions/implementation of the processing module 703 and the storage module in fig. 7 may be implemented by the transceiver 603 in the communication device 600 shown in fig. 6. The functions/implementation of the processing module 703 in fig. 7 may be implemented by the processor 601 in the communication device 600 shown in fig. 6 invoking computer executable instructions stored in the memory 602.

Since the communication device 700 provided in this embodiment can perform the above-mentioned communication method, the technical effects obtained by the communication device can be referred to the above-mentioned method embodiment, and will not be described herein.

In one possible design, the communication apparatus 700 shown in fig. 7 may be adapted to the system shown in fig. 1, and perform the function of the first communication device in the communication method described above with reference to fig. 3-5.

Wherein, the processing module 703 is configured to determine the first information. A sending module 701, configured to indicate the first information to the second communication device. The first information indicates a first time when the first retransmission feedback information corresponding to the first transmission is expected to reach the communication apparatus 700, or indicates a first time period when the communication apparatus 700 waits to receive the first retransmission feedback information, or the first information is used for determining resource information for the second communication device to send the first retransmission feedback information to the communication apparatus 700, where the first transmission is sent by the communication apparatus 700 to the second communication device.

It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

It should be noted that, the transmitting module 701 and the receiving module 702 may be separately provided, or may be integrated into one module, i.e., a transceiver module. The specific implementation manner of the receiving module and the sending module is not specifically limited. The transceiver module may be formed by a transceiver circuit, a transceiver, or a communication interface.

The transmitting module 701, which may also be referred to as a transmitting unit, is configured to implement any one or more of the transmitting functions performed by the first communication device in any of the method embodiments described above. The receiving module 702, which may also be referred to as a receiving unit, is configured to implement any one or more of the receiving functions performed by the first communication device in any of the method embodiments described above.

Optionally, the communication device 700 may further comprise a storage module (not shown in fig. 7) storing programs or instructions. The processing module 703, when executing the program or instructions, enables the communications device 700 to perform the method described in any of the method embodiments described above.

The communication apparatus 700 may be the first communication device, or may be a chip (system) or other components or assemblies that may be provided in the first communication device, which is not limited in this application.

In addition, the technical effects of the communication device 700 may refer to the technical effects of the communication method shown in fig. 3-5, and will not be described herein.

Fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in fig. 8, the communication apparatus 800 includes: the processing module 803 and the obtaining module 804 may further include a sending module 801 and/or a receiving module 802. For ease of illustration, fig. 8 shows only the main components of the communication device 800.

In the present embodiment, the communication apparatus 800 is presented in a form in which respective functional modules are divided in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate that the communication device 800 may take the form of the communication device 600 shown in fig. 6.

In particular, the functions/implementation of the processing module 803 and the storage module in fig. 8 may be implemented by the transceiver 603 in the communication apparatus 600 shown in fig. 6. The functions/implementation of the processing module 803 in fig. 8 may be implemented by the processor 601 in the communication device 600 shown in fig. 6 invoking computer executable instructions stored in the memory 602.

Since the communication device 800 provided in this embodiment can perform the above-mentioned communication method, the technical effects obtained by the method can be referred to the above-mentioned method embodiment, and will not be described herein.

In one possible design, the communication apparatus 800 shown in fig. 8 may be adapted to the system shown in fig. 1, and perform the function of the second communication device in the communication method described above with reference to fig. 3-5.

An obtaining module 804 is configured to determine first information. A processing module 803, configured to determine a first resource according to the first information. The first information indicates a first time when first retransmission feedback information corresponding to the first transmission arrives at the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information for sending the first retransmission feedback information to the first communication device, where the first transmission is received by the communication apparatus 800 from the first communication device. The first resource is used for the communication apparatus 800 to transmit the first retransmission feedback information to the first communication device.

It should be noted that, the transmitting module 801 and the receiving module 802 may be separately provided, or may be integrated into one module, i.e., a transceiver module. The specific implementation manner of the receiving module and the sending module is not specifically limited. The transceiver module may be formed by a transceiver circuit, a transceiver, or a communication interface.

The transmitting module 801, which may also be referred to as a transmitting unit, is configured to implement any one or more of the transmitting functions performed by the second communication device in any of the method embodiments described above. The receiving module 802, which may also be referred to as a receiving unit, is configured to implement any one or more of the receiving functions performed by the second communication device in any of the method embodiments described above.

Optionally, the communication device 800 may further comprise a storage module (not shown in fig. 8) storing programs or instructions. The processing module 803, when executing the program or instructions, enables the communication device 800 to perform the method described in any of the method embodiments described above.

The communication apparatus 800 may be the second communication device, or may be a chip (system) or other components or assemblies that may be provided in the second communication device, which is not limited in this application.

In addition, the technical effects of the communication apparatus 800 may refer to the technical effects of the communication method shown in fig. 3-5, and will not be described herein.

Fig. 9 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in fig. 9, the communication apparatus 900 includes: the sending module 901 and the receiving module 902 may further include a processing module 903. For ease of illustration, fig. 9 shows only the main components of the communication device 900.

In the present embodiment, the communication apparatus 900 is presented in a form in which respective functional modules are divided in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate that the communication device 900 may take the form of the communication device 600 shown in fig. 6.

In particular, the functions/implementation of the processing module 903 and the storage module in fig. 9 may be implemented by the transceiver 603 in the communication device 600 shown in fig. 6. The functions/implementations of the processing module 903 in fig. 9 may be implemented by the processor 601 in the communications device 600 shown in fig. 6 invoking computer executable instructions stored in the memory 602.

Since the communication device 900 provided in this embodiment can perform the above-mentioned communication method, the technical effects obtained by the communication device can be referred to the above-mentioned method embodiment, and will not be described herein.

In one possible design, the communication apparatus 900 shown in fig. 9 may be adapted to the system shown in fig. 1, and perform the function of the first communication device in the communication method described above with reference to fig. 4-5.

A receiving module 902 is configured to receive first request information from a second communication device. A sending module 901, configured to send resource sharing information to the second communication device. Wherein the first request information is for requesting sharing of resources of the communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of the second communication device, an identification of the fourth communication device, a resource scheduling mode adopted by the second communication device, and sharing indication information. The fourth communication device requests a receiving device for the second communication device to transmit the resource. The resource sharing information is information indicating that the communication apparatus shares the second resource to the second communication device.

It should be noted that, the transmitting module 901 and the receiving module 902 may be separately provided, or may be integrated into one module, i.e., a transceiver module. The specific implementation manner of the receiving module and the sending module is not specifically limited. The transceiver module may be formed by a transceiver circuit, a transceiver, or a communication interface.

The sending module 901, which may also be referred to as a sending unit, is configured to implement any one or more sending functions performed by the first communications device in any of the method embodiments described above. The receiving module 902, which may also be referred to as a receiving unit, is configured to implement any one or more of the receiving functions performed by the first communication device in any of the method embodiments described above. The processing module 903, which may also be referred to as a processing unit, is configured to implement any one or more of the processing functions performed by the first communications device in any of the method embodiments described above.

Optionally, the communication device 900 may further include a storage module (not shown in fig. 9) storing programs or instructions. The processing module 903, when executing the program or instructions, enables the communications device 900 to perform the method described in any of the method embodiments described above.

The communication apparatus 900 may be the first communication device, or may be a chip (system) or other components or assemblies that may be provided in the first communication device, which is not limited in this application.

In addition, the technical effects of the communication apparatus 900 may refer to the technical effects of the communication method shown in fig. 4 to 5, and will not be described herein.

In another possible design, the communication apparatus 900 shown in fig. 9 may be adapted to the system shown in fig. 1, and perform the function of the second communication device in the communication method described above with reference to fig. 4-5.

Wherein, the sending module 901 is configured to send the first request information to the first communication device. A receiving module 902 is configured to receive resource sharing information from the first communication device. Wherein the first request information is for requesting sharing of resources of the first communication device, the first request information comprising one or more of: information of data to be transmitted, an identification of a communication device, an identification of a fourth communication apparatus, a resource scheduling mode adopted by the communication device, and sharing instruction information. The fourth communication device is a receiving device for requesting resources for transmission by the communication device. The resource sharing information is information indicating a second resource shared by the first communication device to the communication apparatus.

The sending module 901, which may also be referred to as a sending unit, is configured to implement any one or more sending functions performed by the second communications device in any of the method embodiments described above. The receiving module 902, which may also be referred to as a receiving unit, is configured to implement any one or more of the receiving functions performed by the second communications device in any of the method embodiments described above. The processing module 903, which may also be referred to as a processing unit, is configured to implement any one or more of the processing functions performed by the second communications device in any of the method embodiments described above.

The communication apparatus 900 may be the second communication device, or may be a chip (system) or other components or assemblies that may be provided in the second communication device, which is not limited in this application.

In another possible design, the communication apparatus 700 shown in fig. 7 may be adapted to the system shown in fig. 1, and perform the function of the first communication device in the communication method described above with reference to fig. 5.

Wherein the processing module 703 is configured to determine that the third condition is satisfied. A sending module 701, configured to send the second request information to the first communication device. Wherein the third condition comprises one or more of: the method includes determining that resources of a first communication device are needed or of interest or are configured to be shared, not having established a unicast link with the first communication device, obtaining resource sharing information for the first communication device, determining that a resource sharing request needs to be sent, and determining that the first communication device needs to be requested to share resources. The second request information is used to request establishment of a unicast link.

In addition, the technical effects of the communication apparatus 700 may refer to the technical effects of the communication method shown in fig. 5, and will not be described herein.

The embodiment of the application provides a communication system. The communication system includes: a first communication device and a second communication device.

The specific execution method and process of the actions of the first communication device for executing the actions of the first communication device in the above method embodiment by the second communication device in the above method embodiment may refer to the above method embodiment, and are not repeated herein.

Embodiments of the present application provide a chip system including logic circuitry and input/output ports. The logic circuit may be used to implement a processing function related to the communication method provided by the embodiment of the application, and the input/output port may be used to transmit and receive a signal related to the communication method provided by the embodiment of the application.

Illustratively, the input port may be used to implement a receiving function related to the communication method provided by the embodiment of the present application, and the output port may be used to implement a transmitting function related to the communication method provided by the embodiment of the present application.

Illustratively, the processor in the communications device 600 may be configured to perform, for example and without limitation, baseband related processing, and the transceiver in the communications device 600 may be configured to perform, for example and without limitation, radio frequency transceiving. The above devices may be provided on separate chips, or may be provided at least partially or entirely on the same chip. For example, the processor may be further divided into an analog baseband processor and a digital baseband processor. Wherein the analog baseband processor may be integrated on the same chip as the transceiver and the digital baseband processor may be provided on a separate chip. With the continued development of integrated circuit technology, more and more devices may be integrated on the same chip, for example, a digital baseband processor may be integrated on the same chip with a variety of application processors (e.g., without limitation, graphics processors, multimedia processors, etc.). Such chips may be referred to as system on chips (system on chips). Whether the individual devices are independently disposed on different chips or integrally disposed on one or more chips is often dependent on the specific needs of the product design. The embodiment of the invention does not limit the specific implementation form of the device.

In one possible design, the system on a chip further includes a memory for storing program instructions and data for implementing the functions related to the communication method provided by the embodiments of the present application.

The present embodiments provide a computer-readable storage medium storing a computer program or instructions that, when executed on a computer, cause a communication method provided by the embodiments of the present application to be performed.

Embodiments of the present application provide a computer program product comprising: computer programs or instructions which, when run on a computer, cause the communication methods provided by the embodiments of the present application to be performed.

It should be appreciated that the processor in embodiments of the present application may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., 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 such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

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

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

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the first communication device determining first information; the first information indicates a first moment when first retransmission feedback information corresponding to a first transmission is expected to reach the first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information used for a second communication device to send the first retransmission feedback information to the first communication device, and the first transmission is sent by the first communication device to the second communication device;

the first communication device indicates the first information to the second communication device.

2. The communication method according to claim 1, wherein the first communication device determines first information, comprising:

The first communication equipment determines first information according to the first resource information and/or cache emptying information; the first resource information indicates information of feedback resources corresponding to the first transmission, and the buffer emptying information indicates duration of time of the first transmission stored in a corresponding buffer.

3. The communication method according to claim 2, wherein the feedback resource corresponding to the first transmission is used for the first communication device to send the second retransmission feedback information corresponding to the first transmission to a third communication device.

4. A communication method according to claim 3, characterized in that the third communication device is a network device to which the first communication device belongs, or the third communication device is a communication device that performs side-link communication with the first communication device.

5. The communication method according to claim 2, wherein the feedback resource corresponding to the first transmission includes: the uplink control channel resource corresponding to the first transmission, the uplink shared channel resource corresponding to the first transmission, and/or the side uplink feedback channel resource corresponding to the first transmission.

6. The communication method according to any of claims 2-5, wherein the first communication device determining the first information according to first resource information and/or cache flushing information comprises:

And the first communication equipment determines the first information according to the time of the feedback resource corresponding to the first transmission and the time which is more front in time in the time of the first communication equipment emptying the buffer corresponding to the first transmission.

7. The communication method according to any one of claims 2-6, wherein the cache flush information includes: the method comprises the steps of storing at least one transmission in a corresponding buffer memory, wherein the at least one transmission comprises the first transmission, and the first storage duration is the duration of the transmission stored in the corresponding buffer memory.

8. The communication method according to any of claims 2-7, wherein the cache flush information is pre-configured, pre-defined, or determined by the first communication device, or the cache flush information is from a network device to which the first communication device belongs.

9. The communication method according to any one of claims 1 to 8, wherein the first communication device indicates the first information to the second communication device, comprising:

in the case that a first condition is satisfied, the first communication device indicates the first information to the second communication device; wherein the first condition includes one or more of: the first communication device obtains cache empty information, the first communication device works in a scheduling resource allocation mode and obtains first resource information, the first communication device does not share resources of the first communication device to the second communication device, and used resources of the second communication device for sending the first retransmission feedback information to the first communication device are not determined by the first communication device.

10. The communication method of claim 9, wherein the resources of the first communication device include a channel occupancy time, COT, determined by the first communication device.

11. The communication method according to any one of claims 1 to 10, wherein the first communication device indicates the first information to the second communication device, comprising:

the first communication device sends second information to the second communication device; wherein the second information indicates a channel access priority level, and the channel access priority level corresponds to the first information.

12. The communication method according to any one of claims 1-11, characterized in that the method further comprises:

when the first communication device indicates the first information to the second communication device, the first communication device starts a first timer; wherein, the value or duration of the first timer is determined according to the first information;

the first communication device determines whether to send second retransmission feedback information corresponding to the first transmission to third communication device or determine to ignore the first retransmission feedback information or determine retransmission resources according to whether the first timer is running, whether the first timer is overtime and/or the arrival time of the first retransmission feedback information corresponding to the first transmission.

13. The communication method according to any one of claims 1-12, wherein the first information corresponds to a channel access priority class.

14. The communication method according to any of claims 1-12, wherein at least one of the first information, at least one channel access priority class, and at least one resource pool corresponds to each other.

15. A method of communication, comprising:

the second communication device determining first information; the first information indicates a first moment when first retransmission feedback information corresponding to first transmission arrives at a first communication device, or indicates a first duration when the first communication device waits to receive the first retransmission feedback information, or the first information is used for determining resource information used for the second communication device to send the first retransmission feedback information to the first communication device, and the first transmission is received by the second communication device from the first communication device;

the second communication equipment determines a first resource according to the first information; wherein the first resource is used for the second communication device to send the first retransmission feedback information to the first communication device.

16. The communication method according to claim 15, wherein the time corresponding to the first resource is before the first time, or a time interval between the time of the first transmission and the first resource is less than or equal to the first duration.

17. The communication method according to claim 15 or 16, wherein the second communication device determines the first information, comprising:

the second communication device receives the first information from the first communication device.

18. The communication method according to claim 15 or 16, wherein the second communication device determines the first information, comprising:

the second communication equipment determines the first information according to the second information and the corresponding relation information; the corresponding relation information comprises at least one corresponding relation among the first information, at least one channel access priority level and/or at least one resource pool, and the second information indicates the channel access priority level.

19. The communication method according to claim 18, wherein the second communication device determines the first information based on second information and correspondence information, comprising:

The second communication device determines the first information according to the second information, the corresponding relation information and the second resource information; wherein the second resource information indicates a resource pool to which a resource carrying the first transmission belongs.

20. The communication method according to any one of claims 15-19, wherein the second communication device determining a first resource from the first information comprises:

the second communication device determines the first resource from the resources of the second communication device according to the first information.

21. A method of communicating according to any of claims 15-20, wherein the method further comprises:

when the second communication device determines the first information, the second communication device starts a first timer; wherein the value or duration of the first timer is determined according to the first information.

22. The communication method according to claim 21, wherein the second communication device determining a first resource from the first information comprises:

the second communication device determines the first resource according to the first information and the first timer.

23. The communication method according to any one of claims 15-22, wherein the second communication device determining a first resource from the first information comprises:

under the condition that a second condition is met, the second communication device determines the first resource according to the first information; wherein the second condition includes: the second communication device receives fourth information from the first communication device, and/or the second communication device performs Listen Before Talk (LBT) failure on a feedback resource corresponding to the first transmission and preconfigured or indicated by the first communication device; wherein the fourth information indicates a resource determined by the second communication device that the second communication device transmits the first retransmission feedback information to the first communication device or indicates that the first communication device does not share the resource of the first communication device to the second communication device.

24. A communication device, characterized in that it comprises means or modules for performing the method according to any of claims 1 to 14.

25. A communication device comprising means or modules for performing the method of any of claims 15 to 23.

26. A communication device, the communication device comprising: a processor; the processor configured to perform the communication method of any one of claims 1-23.

27. A communication system comprising means for performing the communication of claim 24 and means for performing the communication of claim 25.

28. A chip system comprising a processor and an input/output port, the processor being coupled to a memory containing instructions for controlling a communication device in which the chip system is installed to implement the method of any of claims 1-23.

29. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program or instructions, which, when run on a computer, cause the communication method according to any one of claims 1-23 to be performed.

30. A computer program product, the computer program product comprising: computer program or instructions which, when run on a computer, cause the communication method according to any one of claims 1-23 to be performed.