CN112218373B

CN112218373B - Communication method and device

Info

Publication number: CN112218373B
Application number: CN201910631421.7A
Authority: CN
Inventors: 张向东
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2022-05-10
Anticipated expiration: 2039-07-12
Also published as: CN112218373A; WO2021008421A1

Abstract

The embodiment of the application discloses a communication method and a communication device, relates to the technical field of communication, and solves the problem that resource consumption is large when SL CG is activated or deactivated in an NR network in the prior art. The specific scheme is as follows: the first terminal receives first indication information sent by the wireless access network equipment, wherein the first indication information is used for indicating whether the first terminal sends confirmation feedback; the confirmation feedback is used for indicating the first terminal to successfully receive second indication information sent by the wireless access network equipment, and the second indication information is used for indicating the first terminal to activate or deactivate the first sidelink SL resource allocated by the wireless access network equipment; and the first terminal sends confirmation feedback according to the first indication information.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method and device.

Background

In a Long Term Evolution (LTE) communication system, in order to reduce the overhead of a Physical Downlink Control Channel (PDCCH), a Semi-Persistent Scheduling (SPS) is introduced as a Scheduling method. The SPS refers to that a base station designates a Radio resource (referred to as SPS resource) used by User Equipment (UE) by using a PDCCH scrambled by an SPS-RNTI (semi persistent scheduling Radio Network temporary Identity, RNTI) at a certain transmission time, and the UE transmits service data at the SPS resource position at regular intervals, and the base station does not need to issue the PDCCH to designate the allocated resource.

In New Radio (NR) communication systems, the idea of configuring a granted grant (CG) or a grant-free (SPS) is similar. The CGs in the NR are divided into two types, the first type CG is a configuration related to all CGs configured by Radio Resource Control (RRC) signaling, and the CGs are valid after configuration, and the UE can use the CGs; the second CG is related to the configuration of the RRC configuration part CG, and is not valid after configuration, and needs to configure other CGs using physical Downlink Control Information (DCI) and activate the CGs for use.

Currently, in NR communication systems, all Uplink (UL) CG configurations need to be confirmed for the CG of the second class. For the Vehicle networking (V2X), if authorization is configured on the SideLink (SL) of V2X, the activation and deactivation of the SL CG by the UE may require acknowledgement feedback, which results in large resource consumption. Moreover, since the CG resource of the SL is a resource on the SL, and the UE sends the acknowledgement feedback to the base station and needs to use a resource on the UL, how to allocate the resource for the UE to send the acknowledgement feedback is an urgent problem to be solved for the activation or deactivation command of the SL CG.

Disclosure of Invention

The embodiment of the application provides a communication method and device, which can send confirmation feedback according to the requirement of a network side, so that the feedback is more targeted, and the resource consumption is reduced.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect of an embodiment of the present application, a first terminal receives first indication information sent by a radio access network device, where the first indication information is used to indicate whether the first terminal sends a confirmation feedback; the acknowledgement feedback is used for indicating the first terminal to successfully receive second indication information sent by the radio access network equipment, and the second indication information is used for indicating the first terminal to activate or deactivate the first sidelink SL resource allocated by the radio access network equipment; and the first terminal sends the confirmation feedback according to the first indication information. Based on the scheme, the terminal can send the confirmation feedback according to the indication of the wireless access network equipment, so that the confirmation feedback can be sent according to the requirement of the network side, the feedback is more targeted, and unnecessary resource waste can be reduced while the interference among resources is reduced. It can be understood that the sending, by the first terminal, the acknowledgement feedback according to the first indication information includes: and after the first terminal determines to send the confirmation feedback according to the first indication information, the first terminal sends the confirmation feedback again.

With reference to the first aspect, in a possible implementation manner, the first SL resource is a semi-persistent scheduling resource or a configuration grant resource. Based on the scheme, the activated or deactivated SL resource may be an SPS resource or a CG resource.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes first information, where the first information carries a first parameter, and different values of the first parameter are used to indicate that the first terminal sends acknowledgment feedback or does not send acknowledgment feedback. Based on the scheme, the radio access network device can indicate whether the first terminal sends the acknowledgement feedback or not through the value of the first parameter in the first indication information.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes second information, where the second information carries a first threshold, and the first threshold is used to indicate that the first terminal sends acknowledgement feedback to the radio access network device when a transmission time interval of the first SL resource is less than or equal to the first threshold. Based on the scheme, the radio access network device may instruct the first terminal to send acknowledgement feedback to the base station when the SPS/CG period is small, so as to reduce interference between resources.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending, by the first terminal, the acknowledgment feedback according to the first indication information includes: and when the first terminal determines that the transmission time interval of the first SL resource is smaller than or equal to the first threshold and the first terminal successfully receives the second indication information, the first terminal sends the acknowledgement feedback to the radio access network device. Based on the scheme, when the SPS/CG period is determined to be small, the terminal can send confirmation feedback to the base station, so that the interference among resources is reduced, and the understanding of the activation/deactivation of the SPS/CG resources by the terminal and the base station is consistent.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes third information, where the third information carries a first uplink UL resource, and the first UL resource is used for sending the acknowledgement feedback. Based on the scheme, the third information may implicitly instruct the first terminal to send the acknowledgement feedback, or instruct the first terminal to send the acknowledgement feedback in the first UL resource when the first terminal determines to send the acknowledgement feedback according to the first information and/or the second information.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: and the first terminal receives third indication information sent by the radio access network equipment, wherein the third indication information is used for indicating first UL resources used for sending the acknowledgement feedback. Based on the scheme, the first terminal may receive third indication information indicating the first UL resource, which is sent by the radio access network device alone, so as to send acknowledgement feedback on the first UL resource.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending, by the first terminal, the acknowledgment feedback to the radio access network device includes: the first terminal sends the acknowledgement feedback to the radio access network device in the first UL resource. Based on the scheme, the first terminal can send the acknowledgement feedback on the first UL resource allocated by the radio access network device, so that the radio access network device learns that the first terminal successfully receives the activation or deactivation command sent by the radio access network device.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: and the first terminal sends hybrid automatic repeat request (HARQ) feedback to the radio access network equipment in the first UL resource, wherein the HARQ feedback is used for indicating whether the first terminal successfully sends or receives data in the first SL resource. Based on the scheme, the first UL resource allocated by the radio access network device may also be used to send HARQ feedback, so that the base station knows whether the data transmitted by the first terminal on the first SL resource is successful.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the second indication information is carried in second downlink control information DCI, the first indication information is carried in the second DCI or the first radio link control RRC message, and the third indication information is carried in the second DCI or the third DCI or the first RRC message. Based on the scheme, the first indication information and the second indication information may be carried in one DCI (second DCI), or may be carried in different DCIs, the first indication information may also be carried in an RRC message, and the third indication information may be carried in the second DCI, may also be carried in the third DCI separately, or may also be carried in the first RRC message. It can be understood that the first indication information, the second indication information and the third indication information may have multiple carrying manners, and the carrying manners of the three indication information are not affected by each other and do not have strong correlation. For example, when the first indication information is carried in the first DCI, there is no influence on the specific carrying manners of the second indication information and the third indication information, for example, the second indication information may be carried in the second DCI, the third indication information may be carried in the third DCI, or the second indication information may be carried in the second DCI, and the third indication information may be carried in the first RRC message, or the second indication information may be carried in the second DCI, and the third indication information may also be carried in the second DCI.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: the first terminal receives a first RRC message sent by the radio access network device, where the first RRC message carries the first SL resource and the transmission time interval of the first SL resource. Based on the scheme, the terminal can receive the first RRC message sent by the radio access network equipment, and since the SPS/CG resource is configured by adopting the type2 in the application, the configuration is not effective after the first terminal receives the RRC message sent by the radio access network equipment, and the configured resource can be used only after activation or deactivation.

In a second aspect of the embodiments of the present application, a wireless access network device determines first indication information, where the first indication information is used to indicate whether a first terminal sends acknowledgement feedback; the acknowledgement feedback is used for indicating the first terminal to successfully receive second indication information sent by the radio access network device, and the second indication information is used for indicating the first terminal to activate or deactivate a first sidelink SL resource allocated by the radio access network device; the radio access network equipment sends the first indication information to the first terminal. Based on the scheme, the wireless access network equipment can determine whether the first terminal is instructed to send the confirmation feedback according to the network resource condition, so that the terminal can send the confirmation feedback according to the instruction of the wireless access network equipment, the feedback is more targeted, and unnecessary resource waste can be reduced.

With reference to the second aspect, in a possible implementation manner, the first SL resource is a semi-persistent scheduling resource or a configuration grant resource. Based on the scheme, the activated or deactivated SL resource may be an SPS resource or a CG resource.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes first information, where the first information carries a first parameter, and different values of the first parameter are used to indicate that the first terminal sends acknowledgment feedback or does not send acknowledgment feedback. Based on the scheme, the radio access network device can indicate whether the first terminal sends the acknowledgement feedback or not through the value of the first parameter in the first indication information.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes second information, where the second information carries a first threshold, and the first threshold is used to indicate that the first terminal sends acknowledgement feedback to the radio access network device when a time interval of the first SL resource is less than or equal to the first threshold. Based on the scheme, the radio access network device may instruct the first terminal to send acknowledgement feedback to the base station when the SPS/CG period is small, so as to reduce interference between resources.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes third information, where the third information carries a first uplink UL resource, and the first UL resource is used for sending the acknowledgement feedback. Based on the scheme, the third information may implicitly instruct the first terminal to send the acknowledgement feedback, or instruct the first terminal to send the acknowledgement feedback in the first UL resource when the first terminal determines to send the acknowledgement feedback according to the first information and/or the second information.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: and the radio access network equipment sends third indication information to the first terminal, wherein the third indication information is used for indicating first UL resources, and the first UL resources are used for sending the acknowledgement feedback. Based on the scheme, the first terminal may receive third indication information indicating the first UL resource, which is sent by the radio access network device alone, so as to send acknowledgement feedback on the first UL resource.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending, by the radio access network device, third indication information to the first terminal includes: and the wireless access network equipment sends the third indication information to the first terminal within a first preset time length from the beginning of sending the second indication information to the first terminal by the wireless access network equipment. Based on the scheme, the radio access network device can send the third indication information within the preset time for sending the second indication information, so that the problem that the first terminal does not know when the radio access network device allocates the uplink UL resource and may need to wait all the time is solved.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the first UL resource is further configured to send a hybrid automatic repeat request HARQ feedback, where the HARQ feedback is used to indicate whether the first terminal successfully sends or receives data in the first SL resource. Based on the scheme, the first UL resource allocated by the radio access network device may also be used to send HARQ feedback, so that the radio access network device may know whether the data transmitted by the first terminal on the first SL resource is successful.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the second indication information is carried in second downlink control information DCI, the first indication information is carried in the second DCI, the first DCI, or the first radio link control RRC message, and the third indication information is carried in the second DCI, the third DCI, or the first RRC message. Based on the scheme, the first indication information and the second indication information may be carried in one DCI (second DCI), or may be carried in different DCIs, the first indication information may also be carried in an RRC message, and the third indication information may be carried in the second DCI, may also be carried in the third DCI separately, or may also be carried in the first RRC message.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: and the radio access network equipment receives the acknowledgement feedback sent by the first terminal in the first UL resource. Based on the scheme, the radio access network device may receive acknowledgement feedback of the first UL resource transmission allocated by the first terminal, so that the understanding of the activation or deactivation of the SPS/CG resources by the radio access network device and the first terminal is consistent.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: the radio access network device sends a first RRC message to the first terminal, where the first RRC message carries the first SL resource and the transmission time interval of the first SL resource. Based on the scheme, the radio access network device may send the first RRC message to the terminal, and since the SPS/CG resource is configured by using type2 in the present application, the radio access network device needs to send activated or deactivated second indication information to the first terminal after sending the RRC message to the first terminal.

In a third aspect of the embodiments of the present application, there is provided a terminal apparatus, including: a processing unit and a transceiver unit; the receiving and sending unit is configured to receive first indication information sent by the radio access network device, where the first indication information is used to indicate whether the terminal apparatus sends an acknowledgement feedback; the confirmation feedback is used for indicating the terminal device to successfully receive second indication information sent by the radio access network equipment, and the second indication information is used for indicating the terminal device to activate or deactivate the first sidelink SL resource allocated by the radio access network equipment; and the processing unit is used for sending the confirmation feedback according to the first indication information.

With reference to the third aspect, in a possible implementation manner, the first SL resource is a semi-persistent scheduling resource or a configuration grant resource.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes first information, where the first information carries a first parameter, and different values of the first parameter are used to indicate that the terminal device sends the acknowledgment feedback or does not send the acknowledgment feedback.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes second information, where the second information carries a first threshold, and the first threshold is used to indicate that the terminal device sends acknowledgement feedback to the radio access network device when a transmission time interval of the first SL resource is less than or equal to the first threshold.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, the processing unit is specifically configured to: when the processing unit determines that the transmission time interval of the first SL resource is smaller than or equal to the first threshold and the transceiver unit successfully receives the second indication information, the processing unit sends the acknowledgement feedback to the radio access network device through the transceiver unit.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes third information, where the third information carries a first uplink UL resource, and the first UL resource is used for sending the acknowledgement feedback.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and receiving third indication information sent by the radio access network equipment, wherein the third indication information is used for indicating a first UL resource, and the first UL resource is used for sending the acknowledgement feedback.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is specifically configured to: and sending the acknowledgement feedback to the radio access network equipment in the first UL resource.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and sending hybrid automatic repeat request (HARQ) feedback to the wireless access network equipment at the first UL resource, wherein the HARQ feedback is used for indicating whether the terminal device successfully sends or receives data at the first SL resource.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the second indication information is carried in second downlink control information DCI, the first indication information is carried in the second DCI or the first radio link control RRC message, and the third indication information is carried in the second DCI or the third DCI or the first RRC message.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and receiving a first RRC message sent by the radio access network device, where the first RRC message carries the first SL resource and a transmission time interval of the first SL resource.

In a fourth aspect of the embodiments of the present application, a radio access network device is provided, where the radio access network device includes: a processing unit and a transceiver unit; the processing unit is configured to determine first indication information, where the first indication information is used to indicate whether the first terminal sends the acknowledgement feedback; the acknowledgement feedback is used for indicating the first terminal to successfully receive second indication information sent by the transceiver unit, and the second indication information is used for indicating the first terminal to activate or deactivate a first sidelink SL resource allocated by the radio access network equipment; the transceiver unit is configured to send the first indication information to the first terminal.

With reference to the fourth aspect, in a possible implementation manner, the first SL resource is a semi-persistent scheduling resource or a configuration grant resource.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes first information, where the first information carries a first parameter, and different values of the first parameter are used to indicate that the first terminal sends acknowledgment feedback or does not send acknowledgment feedback.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes second information, where the second information carries a first threshold, and the first threshold is used to indicate that the first terminal sends acknowledgement feedback to the radio access network device when a time interval of the first SL resource is less than or equal to the first threshold.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first indication information includes third information, where the third information carries a first uplink UL resource, and the first UL resource is used for sending the acknowledgement feedback.

With reference to the fourth aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and sending third indication information to the first terminal, wherein the third indication information is used for indicating a first UL resource, and the first UL resource is used for sending the acknowledgement feedback.

With reference to the fourth aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is specifically configured to: the transceiver transmits the third indication information to the first terminal within a first preset time period from the transceiver transmitting the second indication information to the first terminal.

With reference to the fourth aspect and the foregoing possible implementation manners, in another possible implementation manner, the first UL resource is further configured to send a hybrid automatic repeat request HARQ feedback, where the HARQ feedback is used to indicate whether the first terminal successfully sends or receives data in the first SL resource.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the second indication information is carried in second downlink control information DCI, the first indication information is carried in the second DCI or the first radio link control RRC message, and the third indication information is carried in the second DCI or the third DCI or the first RRC message.

With reference to the fourth aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and receiving the acknowledgement feedback sent by the first terminal in the first UL resource.

With reference to the fourth aspect and the foregoing possible implementation manners, in another possible implementation manner, the transceiver unit is further configured to: and sending a first RRC message to the first terminal, where the first RRC message carries the first SL resource and the transmission time interval of the first SL resource.

The above descriptions of the effects of the third aspect and various implementations of the third aspect may refer to the descriptions of the corresponding effects of the first aspect and various implementations of the first aspect, and the descriptions of the effects of the fourth aspect and various implementations of the fourth aspect may refer to the descriptions of the corresponding effects of the second aspect and various implementations of the second aspect, which are not repeated herein.

A fifth aspect of the embodiments of the present application provides a computer storage medium having computer program code stored therein, which, when run on a processor, causes the processor to execute the communication method of any one of the above aspects.

In a sixth aspect of the embodiments of the present application, a computer program product is provided, where the computer program product stores computer software instructions executed by the processor, and the computer software instructions include a program for executing the solution of the above aspect.

A seventh aspect of the embodiments of the present application provides a communications apparatus, where the apparatus includes a processor, and may further include a transceiver and a memory, where the transceiver is configured to send and receive information or to communicate with other network elements; a memory for storing computer execution instructions; a processor for executing the computer-executable instructions to support a terminal device or a radio access network device to implement the communication method of any one of the above aspects.

In an eighth aspect of the embodiments of the present application, there is provided a communication apparatus, which may be in the form of a chip, and the apparatus includes a processor and a memory, where the memory is configured to be coupled to the processor and store necessary program instructions and data of the apparatus, and the processor is configured to execute the program instructions stored in the memory to support a terminal device or a radio access network device to perform the communication method according to any one of the above aspects.

In a ninth aspect of the embodiments of the present application, there is provided a communication device, which may exist in the form of a chip product, and the structure of the device includes a processor and an interface circuit, where the processor is configured to communicate with other devices through a receiving circuit, so that the device performs the communication method according to any one of the above aspects.

In a tenth aspect of embodiments of the present application, a communication system is provided, which includes a terminal and a radio access network device, where the terminal may perform the method according to the first aspect, and the radio network device may perform the method according to the second aspect.

Drawings

Fig. 1 is a schematic diagram of a V2X communication scenario provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present application;

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

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

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

fig. 7 is a schematic composition diagram of a radio access network device according to an embodiment of the present application;

fig. 8 is a schematic composition diagram of another terminal device provided in the embodiment of the present application;

fig. 9 is a schematic composition diagram of another radio access network device according to an embodiment of the present application.

Detailed Description

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

The communication system in the present application may be a Long Term Evolution (LTE) wireless communication system, or a fifth generation (5G) mobile communication system such as a New Radio (NR) system, or other Next Generation (NG) communication systems, and the like, and the present application is not limited thereto.

In the present application, the radio access network device may be a base station defined by the third generation partnership project (3 GPP). For example, the base station device may be a base station device in an LTE system, that is, an evolved NodeB (eNB/eNodeB); it may also be an access network side device in the NR system, including a gNB, a transmission point (TRP), and the like. The radio access network device may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), and a structure of CU-DU may be used to split protocol layers of a base station, where part of functions of the protocol layers are centrally controlled by the CU, and the rest or all of the functions of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU. In addition, when the Core Network to which the eNB accesses the NR may be referred to as a Next Generation Core (NGC) or a 5G Core Network (5th Generation Core Network, 5GC), the LTE eNB may also be referred to as an LTE eNB. Specifically, the LTE eNB is an LTE base station device that evolves on the basis of the LTE eNB, and may be directly connected to the 5G CN, and the LTE eNB also belongs to a base station device in the NR. The access network device 101 or the access network device 102 may also be a Wireless Terminal (WT), such as an Access Point (AP) or an Access Controller (AC), or other network devices having a capability of communicating with a terminal and a core network, such as a relay device, a vehicle-mounted device, an intelligent wearable device, and the like.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple. In addition, for the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like do not limit the quantity and execution order. For example, the "first" of the first devices and the "second" of the second devices in the embodiments of the present application are only used to distinguish different devices.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The "transmission" appearing in the embodiments of the present application refers to a bidirectional transmission, including actions of transmission and/or reception, unless otherwise specified. Specifically, "transmission" in the embodiment of the present application includes transmission of data, reception of data, or both transmission of data and reception of data. Alternatively, the data transmission herein includes uplink and/or downlink data transmission. The data may include channels and/or signals, uplink data transmission, i.e., uplink channel and/or uplink signal transmission, and downlink data transmission, i.e., downlink channel and/or downlink signal transmission.

First, terms in the embodiments of the present application will be explained.

Semi-Persistent Scheduling (SPS): also known as semi-persistent scheduling, SPS allows semi-persistent configuration of radio resources and periodic allocation of the resources to a particular terminal, as opposed to allocating the radio resources once per TTI for a terminal as in dynamic scheduling. SPS refers to a radio resource (referred to as SPS resource) used by a terminal specified by a PDCCH scrambled by SPS RNTI at a certain transmission time by a base station. And at regular intervals, the terminal transmits service data at the SPS resource position, and the base station does not need to issue the PDCCH to specify the allocated resources. The SPS has the characteristic of 'one-time allocation and multiple use', and the PDCCH does not need to be issued every time, so that the overhead of the PDCCH is reduced.

Configuration Grant (CG): similar to SPS, it also has the feature of "one-time dispensing, multiple-time use". The CGs in NR are classified into two types, the first type CG (type 1): the system resource configuration is based entirely on RRC signaling. Namely, the RRC signaling configures all CG related configurations, and the configuration is effective, so that the UE can use the CG related configurations; second CG (type 2): the system resource configuration is commonly controlled by RRC signaling and L1 signaling, where L1 signaling is used for activation and deactivation of the RRC configuration. Namely, the configuration related to the CG of the RRC signaling configuration part is not valid after the configuration, and the CG resources configured by the RRC signaling need to be activated/deactivated through DCI.

The embodiment of the application provides a communication method, which is applied to the V2X communication scenario shown in fig. 1. As shown in fig. 1, the first terminal device and the second terminal device communicate with each other via Sidelink (SL), which refers to a secondary link in the V2X network, and the V2X network includes an uplink (uplink) and a downlink (downlink) in addition to the secondary link.

Illustratively, V2X communication includes Vehicle-to-Vehicle communication (V2V), Vehicle-to-roadside Infrastructure communication (V2I), Vehicle-to-human communication (V2P), and Vehicle-to-application server communication (V2N). Fig. 1 illustrates only the V2V communication in which the first terminal device and the second terminal device are both vehicles, and the specific communication scenario of V2X in the embodiment of the present application is not limited. For example, the first terminal device and the second terminal device may be vehicle-mounted equipment and vehicle-mounted equipment, or may be Road Side Unit (RSU) and vehicle-mounted equipment and/or network equipment (e.g., base station equipment), or may be network equipment (e.g., base station equipment) and vehicle-mounted equipment and/or RSU, or the like, and the network equipment (e.g., LTE base station equipment or NR base station equipment or a base station in a subsequent evolution system).

In LTE, for uplink SPS, the base station first sends RRC signaling to the terminal to configure SPS resources and transmission time intervals (periodicity) of the SPS resources, and then sends DCI to the terminal to activate/deactivate the SPS resources. And after receiving the DCI sent by the base station, the terminal sends confirmation feedback to the base station for informing the base station that the terminal receives the activation/deactivation command of the SPS resource sent by the base station, so that the base station and the terminal have consistent understanding on the activation/deactivation of the SPS resource. In LTE, MAC CE is used for acknowledgement feedback on the Uplink (UL). The resources fed back by the MAC CE are activated/deactivated SPS resources. That is, if it is active and the terminal correctly receives the activation command, the terminal feeds back the MAC CE using the activated resources; if the activation is deactivated and the terminal correctly receives the deactivation command, the terminal firstly feeds back an acknowledgement on the deactivated SPS resources and then deactivates the SPS resources.

However, in the NR V2X scenario, if a type2 is adopted to configure authorization on SL of V2X, is the terminal required to make confirmation feedback? It is easy to think that the terminal confirms all CG configurations, but this causes a problem of large resource consumption. Moreover, if the acknowledgment feedback is performed, since the CG resource configured by the base station is a resource on SL and the resource used by the terminal for sending the acknowledgment feedback to the base station is a resource on UL, the base station may not have a UL resource available when the CG resource of SL is configured for the terminal, and therefore, how the resource for sending the acknowledgment feedback by the terminal is configured is also an urgent problem to be solved.

The problem of large resource consumption when the activation or deactivation of the SL CG in the NR network is solved. The embodiment of the application provides a communication method, which can send confirmation feedback according to the requirement of a network side and reduce resource consumption.

For example, the communication method provided in the embodiment of the present application may be applied to the terminal device shown in fig. 2. The terminal device may be a vehicle; the mobile terminal can also be a vehicle-mounted communication device or a vehicle-mounted terminal which is arranged on the vehicle and used for assisting the vehicle to run, or a chip in the vehicle-mounted communication device or the vehicle-mounted terminal; but may also be one or more components or units built into the vehicle's on-board module, on-board component, on-board chip or on-board unit. The vehicle-mounted terminal may be a device for implementing a wireless communication function, such as a terminal or a chip that can be used in the terminal. The terminal may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a Mobile station, a remote terminal, a Mobile device, a wireless communication device, a terminal agent, or a terminal device in a 5G Network or a Public Land Mobile Network (PLMN) of future evolution. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The vehicle-mounted terminal can be mobile or fixed.

As shown in fig. 2, the terminal device 200 includes at least one processor 201, a memory 202, a transceiver 203, and a communication bus 204.

The respective constituent elements of the terminal apparatus 200 will be described in detail below with reference to fig. 2:

the processor 201 is a control center of the terminal apparatus 200, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 201 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more microprocessors (digital signal processors, DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The processor 201 may perform various functions of the communication device by running or executing software programs stored in the memory 202, and invoking data stored in the memory 202, among other things.

In particular implementations, processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in fig. 2, as one embodiment.

In particular implementations, a communication device may include multiple processors, such as processor 201 and processor 205 shown in fig. 2, for example, as an embodiment. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more communication devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

Memory 202 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) 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 or other magnetic storage devices, 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 202 may be self-contained and coupled to the processor 201 via a communication bus 204. The memory 202 may also be integrated with the processor 201.

The memory 202 is used for storing software programs for implementing the scheme of the present invention, and is controlled by the processor 201 for execution.

A transceiver 203 for communicating with other communication devices. Of course, the transceiver 203 may also be used for communicating with a communication network, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc. The transceiver 203 may include a receiving unit to implement a receiving function and a transmitting unit to implement a transmitting function.

The communication bus 204 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 2, but it is not intended that there be only one bus or one type of bus.

The configuration shown in fig. 2 does not constitute a limitation of the terminal device, and the terminal device 200 may include more or less components than those shown, or combine some components, or a different arrangement of components.

Fig. 3 is a communication method provided in an embodiment of the present application, where the communication method may include steps S301 to S306.

S301, the wireless access network equipment determines first indication information.

The first indication information is used for indicating whether the first terminal sends the acknowledgement feedback. The acknowledgement feedback is used for indicating that the first terminal successfully receives the second indication information sent by the wireless access network equipment. The second indication information is used for indicating the first terminal to activate or deactivate the first SL resource allocated by the radio access network device, and the first SL resource is a semi-persistent scheduling (SPS) resource or a configuration authorization (CG) resource. For example, the second indication information may be carried in a second DCI, where the second DCI activates/deactivates the first SL resource (SPS/CG resource). It can be understood that the embodiment of the present application is described by taking a manner that the first SL resource configures the resource by using type2 as an example.

Illustratively, in a case that the first indication information indicates that the first terminal sends the acknowledgement feedback, if the first terminal successfully receives the second indication information sent by the radio access network device, the first terminal sends the acknowledgement feedback to the radio access network device. And under the condition that the first indication information indicates that the first terminal sends the acknowledgement feedback, but the first terminal does not receive the second indication information sent by the wireless access network equipment, the first terminal does not send the acknowledgement feedback to the wireless access network equipment. And under the condition that the first indication information indicates that the first terminal does not send the acknowledgement feedback, no acknowledgement feedback is sent no matter whether the first terminal successfully receives the second indication information sent by the wireless access network equipment.

For example, the determining, by the radio access network device, the first indication information may include: and the wireless access network equipment determines whether to indicate the first terminal to send the confirmation feedback according to the network resource condition. For example, when network resources are tight, the first terminal may be instructed not to send acknowledgement feedback to reduce resource consumption. Since in the case of network resource shortage, if the first terminal device is configured to send the acknowledgement feedback, the acknowledgement feedback resource needs to be configured, which further increases the network resource shortage.

In one implementation manner, the first indication information includes first information, the first information carries a first parameter, and different values of the first parameter are used to indicate that the first terminal sends the acknowledgement feedback or does not send the acknowledgement feedback. For example, a value of a first parameter carried by first information in the first indication information may be 0 or 1, a value of the first parameter being 0 may indicate that the first terminal does not send acknowledgement feedback, and a value of the first parameter being 1 may indicate that the first terminal sends acknowledgement feedback. In the embodiment of the present application, specific values of the first parameter carried by the first information are not limited, and only 0 and 1 are taken as examples for description herein. It can be understood that, when the first indication information carries the first parameter, the first indication information may explicitly instruct the first terminal to send the acknowledgement feedback or not to send the acknowledgement feedback.

In another implementation manner, the first indication information includes second information, the second information carries a first threshold, and when the first terminal meets the first condition, the first indication information indicates the first terminal to send the acknowledgement feedback. For example, the first condition may be: the time interval of the first terminal in the first SL resource is less than or equal to the first threshold. That is, when the time interval of the first SL resource of the first terminal is less than or equal to the first threshold, the first indication information indicates that the first terminal sends the acknowledgement feedback to the radio access network device; and under the condition that the time interval of the first SL resource is greater than the first threshold value, the first indication information indicates that the first terminal does not send acknowledgement feedback to the wireless access network equipment. For example, if the period of SPS/CG is less than or equal to 10ms, taking the first threshold as 10ms as an example, the first terminal is instructed to send acknowledgement feedback to the radio access network device. And if the period of the SPS/CG is more than 10ms, indicating that the first terminal does not send confirmation feedback to the wireless access network equipment. It is understood that when the SPS/CG period is small, in order to reduce the interference between resources, the terminal and the base station can be made to agree on the understanding of the activation/deactivation of the SPS/CG resources by sending acknowledgement feedback to the base station.

Optionally, the first condition may also be that a time interval of the first terminal in the first SL resource is smaller than a first threshold. That is, when the time interval of the first SL resource of the first terminal is smaller than the first threshold, the first indication information indicates that the first terminal sends the acknowledgement feedback to the radio access network device; when the time interval of the first SL resource is greater than or equal to a first threshold value, the first indication information indicates that the first terminal does not send acknowledgement feedback to the radio access network equipment.

Optionally, the first threshold may be configured by the radio access network device. In one implementation, the first threshold may be configured semi-statically, e.g., configured to the first terminal through higher layer signaling (system message, RRC signaling). In another implementation, the first threshold may be dynamically configured, for example, the radio access network device carries the first threshold in DCI and sends the DCI to the first terminal, where the DCI carrying the first threshold may be a single DCI, or may be an activated/deactivated second DCI, which is not limited in this embodiment of the present invention.

Optionally, the first threshold may be preconfigured in the first terminal. For example, the preconfigured first threshold may be a certain threshold that is fixed by a standard.

Optionally, the first indication information may include both the first information and the second information, or may include only the first information, or only the second information, which is not limited in this embodiment of the application. When the first indication information only includes the second information, the first indication information is used to implicitly indicate whether the first terminal sends the acknowledgement feedback, that is, when the time interval of the first SL resource is less than or equal to the first threshold, the first indication information is used to indicate the first terminal to send the acknowledgement feedback. When the first indication information includes both the first information and the second information, the first indication information may explicitly indicate whether the first terminal sends the acknowledgement feedback through the first parameter, or implicitly indicate whether the first terminal sends the acknowledgement feedback through the first threshold.

It can be appreciated that the radio access network device may indicate whether the first terminal sends the acknowledgement feedback based on the above two ways, so that the first terminal may send the acknowledgement feedback or not according to the requirement of the network device, which reduces resource consumption compared to sending the acknowledgement feedback for all activation/deactivation commands by the terminal.

In another implementation, the first indication information may include third information, where the third information carries a first uplink UL resource, and the first UL resource is used for sending the acknowledgement feedback. It can be understood that, in the case that the first indication information only carries the third information, if the first terminal successfully receives the second indication information sent by the radio access network device, the first terminal sends an acknowledgement feedback to the radio access network device in the first UL resource. That is, when the first indication information only carries the third information, the third information may implicitly indicate that the first terminal sends the acknowledgement feedback in the first UL resource.

Optionally, the first indication information may only include third information, and when the first indication information only includes the third information, the third information is used to implicitly instruct the first terminal to send the acknowledgement feedback. The first indication information may also include both the first information and/or the second information and the third information. In this implementation manner, the first information and/or the second information is used to indicate whether the first terminal sends the acknowledgement feedback, and the first terminal sends the acknowledgement feedback in the first UL resource carried by the third information when the first terminal successfully receives the second indication information sent by the radio access network device.

It is to be understood that the first indication may include one or more of the first information, the second information, and the third information. When the first indication information only includes the first information or the second information or the third information, the first information or the second information or the third information may explicitly or implicitly indicate whether the first terminal sends the acknowledgement feedback. When the first indication information includes both the third information and the first information and/or the second information, the first information and/or the second information is used to indicate whether the first terminal sends the acknowledgement feedback. For example, the first information and/or the second information indicates that the first terminal sends the acknowledgement feedback, and the first terminal successfully receives the second indication information sent by the radio access network device, and the first terminal may send the acknowledgement feedback in the first UL resource carried by the third information.

Optionally, the first UL resource carried by the third information may also be used for the first terminal to send Hybrid Automatic Repeat reQuest (HARQ) feedback. The HARQ feedback is used to indicate whether the first terminal successfully transmits or receives data in the first SL resource. For example, after the SPS/CG resource is activated, when the first terminal device uses the SPS/CG resource to transmit or receive data, the HARQ feedback may be transmitted to the base station through the first UL resource carried by the third information to indicate whether the first terminal device successfully transmits or receives data on the SPS/CG resource. It can be understood that, since the SPS/CG resource is used for data transmission or reception on the SL link, the base station does not know whether data transmission or reception on the SL is successful, and therefore, HARQ feedback may be transmitted to the base station by the terminal device, so that the base station knows whether the terminal successfully transmits data on the SL resource. Optionally, the first UL resource may be a PUCCH resource, or a PUSCH resource. Moreover, the PUCCH resource may be a resource specifically defined for SL SPS, and may be isolated from a PUCCH resource for Uu port, may also be overlapped, and may also be non-overlapped, which is not limited in this embodiment of the present application.

Optionally, the HARQ feedback includes an Acknowledgement (ACK) or a Negative Acknowledgement (NACK). It should be noted that, in this embodiment, if no special description is made, the result that the first terminal receives data is implied or included successfully when the first terminal sends the ACK, and the result that the first terminal receives data is implied or included unsuccessfully when the first terminal sends the NACK.

For example, the first indication information may be carried in the second DCI, may also be carried in the first DCI, and may also be carried in an RRC message.

In one implementation, when the first indication information is carried in the second DCI, the radio access network device may send the first indication information and the second indication information through the second DCI because the second indication information is also carried in the second DCI. That is, both the first indication information and the second indication information may be carried in the second DCI that activates/deactivates the first SL resource. For example, a field is added to the second DCI (activated/deactivated DCI), and the field carries the first indication information. For example, a field is added to the second DCI, and the field carries the first information, the second information, or the third information; or, two fields are added in the second DCI, one field carries the first information, and the other field carries the second information, or one field carries the first information or the second information, and the other field carries the third information; or, three fields are added in the second DCI, one field carries the first information, one field carries the second information, and one field carries the third information.

For example, a first field is added to the second DCI, the first field carries a first parameter, and different values of the first parameter are used to instruct the first terminal to send acknowledgement feedback or not to send acknowledgement feedback. Or, adding a second field in the second DCI, where the second field carries a first threshold, where the first threshold is used to indicate that the first terminal sends the acknowledgement feedback to the radio access network device when the time interval of the first SL resource is less than or equal to the first threshold, and does not send the acknowledgement feedback to the radio access network device when the time interval of the first SL resource is greater than the first threshold. Or, a first field and a second field are added to the second DCI, the first field carries the first parameter, and the second field carries the first threshold. Optionally, when the second DCI carries the first information and/or the second information, a third field may be further added to the second DCI, where the third field carries third information, and the third information includes the first UL resource. I.e. the first UL resource is carried in the third field in the second DCI.

In another implementation, when the first indication information is carried in the first DCI, the second indication information is carried in the second DCI, that is, the radio access network device sends the first indication information and the second indication information through two independent DCIs, respectively. For example, the first DCI carries one or more of the first information, the second information, and the third information.

In another implementation, the first indication information may be carried in an RRC message, where the RRC message may be a first RRC message, and the first RRC message may be an RRC message that carries first resource configuration information sent by the radio access network device to the first terminal, and the first resource configuration information carries the first sidelink SL resource and a transmission time interval of the first SL resource. For example, a field is added in the first RRC message, and the field carries the first indication information. For example, a field is added in the first RRC message, and the field carries the first information, the second information, or the third information; or, two fields are added in the first RRC message, one field carries the first information, and the other field carries the second information. Optionally, in a case that the first RRC message carries the first information and/or the second information, a field may be further added in the first RRC message, where the field carries third information, and the third information includes the first UL resource. I.e. the first UL resource is carried in the first RRC message.

The embodiment of the present application does not limit the specific carrying manner of the first indication information, and the above description is only an exemplary description. In practical application, any one of the above implementation manners may be adopted for carrying the first information, the second information, and the third information.

S302, the wireless access network equipment sends first indication information to the first terminal.

Illustratively, when the first indication information is carried in second DCI, the radio access network device sends the second DCI to the first terminal, where the second DCI carries the first indication information and the second indication information.

Illustratively, when the first indication information is carried in a first RRC message, the radio access network device sends the first RRC message to the first terminal, where the first RRC message carries the first resource configuration information and the first indication information.

Illustratively, when the first indication information is carried in the first DCI, the radio access network device sends the first DCI to the first terminal, where the first DCI carries the first indication information.

S303, the first terminal receives the first indication information.

For example, when the first indication information is carried in the second DCI, the first terminal receives the second DCI sent by the radio access network device, where the second DCI carries the first indication information and the second indication information.

Illustratively, when the first indication information is carried in a first RRC message, the first terminal receives the first RRC message sent by the radio access network device, where the first RRC message carries the first resource configuration information and the first indication information.

Illustratively, when the first indication information is carried in the first DCI, the first terminal receives the first DCI sent by the radio access network device, where the first DCI carries the first indication information.

S304, the first terminal determines whether to send the confirmation feedback according to the first indication information.

In one implementation manner, the first indication information includes first information, the first information carries a first parameter, and different values of the first parameter are used for indicating the first terminal to send the acknowledgement feedback or not to send the acknowledgement feedback.

For example, in this implementation manner, the determining, by the first terminal, whether to send the acknowledgement feedback according to the first indication information in step S304 may include: and the first terminal determines whether to send confirmation feedback according to the value of the first parameter. For example, when the value of the first parameter is 0, the first terminal does not send the acknowledgement feedback, and when the value of the first parameter is 1, if the first terminal successfully receives the second indication information sent by the radio access network device, the first terminal sends the acknowledgement feedback to the radio access network device.

In another implementation, the first indication information includes second information, where the second information carries a first threshold, where the first threshold is used to indicate that the first terminal sends acknowledgement feedback to the radio access network device when a time interval of the first SL resource is less than or equal to the first threshold; and in the case that the time interval of the first SL resource is larger than the first threshold, no acknowledgement feedback is sent to the radio access network equipment.

For example, in this implementation manner, the determining, by the first terminal, whether to send the acknowledgement feedback according to the first indication information in step S304 may include: if the first terminal determines that the transmission time interval of the first SL resource is smaller than or equal to a first threshold, the first terminal sends a confirmation feedback to the wireless access network equipment; and if the first terminal determines that the transmission time interval of the first SL resource is larger than the first threshold, the first terminal does not send acknowledgement feedback to the wireless access network equipment. For example, taking the first threshold as 10ms as an example, when the time interval of the first SL resource is less than or equal to 10ms, if the first terminal successfully receives the second indication information sent by the radio access network device, the first terminal sends the acknowledgement feedback to the radio access network device, and if the first terminal does not successfully receive the second indication information sent by the radio access network device, the first terminal does not send the acknowledgement feedback to the radio access network device. When the time interval of the first SL resource is greater than 10ms, the first terminal does not send acknowledgement feedback to the radio access network device regardless of whether the first terminal successfully receives the activation/deactivation command (the second indication information) sent by the radio access network device.

In another implementation, the first indication information includes third information, where the third information carries the first UL resource, and the third information is used to indicate the first terminal device to send the acknowledgement feedback.

For example, in this implementation manner, the determining, by the first terminal, whether to send the acknowledgement feedback according to the first indication information in step S304 may include: and if the first terminal successfully receives the second indication information, the first terminal determines to send confirmation feedback to the wireless access network equipment in the first UL resource.

It can be understood that, in the embodiment of the present application, the first terminal may determine whether to send the acknowledgement feedback according to the first indication information sent by the network side, so that the acknowledgement feedback can be sent according to a requirement of the network side, and resource consumption is reduced.

According to the communication method provided by the embodiment of the application, first indication information is determined through wireless access network equipment; the wireless access network equipment sends first indication information to a first terminal; a first terminal receives first indication information sent by a wireless access network device, wherein the first indication information is used for indicating whether the first terminal sends confirmation feedback; and the first terminal determines whether to send confirmation feedback according to the first indication information. In this embodiment, the terminal can send the activated/deactivated acknowledgement feedback as needed according to the indication of the radio access network device, so that the feedback is more targeted, thereby reducing the interference between resources and reducing unnecessary resource waste.

Optionally, if the first terminal successfully receives the second indication information sent by the radio access network device and the first indication information indicates that the first terminal sends the acknowledgement feedback, the method may further include steps S305 to S306 after step S304.

S305, the first terminal sends an acknowledgement feedback to the radio access network device in the first UL resource.

For example, the first terminal may send acknowledgement feedback to the network device on uplink resources allocated by the network device.

It can be understood that, since the resource configured by the radio access network device in NR V2X is an SL resource, and the resource for the terminal to send the acknowledgement feedback is an UL resource, the UL resource for sending the acknowledgement feedback is allocated to the terminal by the radio access network device in the present application, so that the terminal can send the acknowledgement feedback on the UL resource when the activation/deactivation command sent by the radio access network device is successfully received.

S306, the radio access network device receives the acknowledgement feedback sent by the first terminal in the first UL resource.

Illustratively, the understanding of the activation/deactivation of SPS/CG resources by the radio access network device and the terminal is consistent after the radio access network device receives the acknowledgement feedback sent by the first terminal on UL resources.

It can be understood that, in the embodiment of the present application, the terminal can send the activated/deactivated acknowledgement feedback as needed according to the indication of the network device, so that the feedback is more targeted, and unnecessary resource waste can be reduced while reducing the interference between resources.

Optionally, in the case that the data transmission on the SL link is successful, the method may further include that the first terminal sends ACK feedback to the radio access network device in the first UL resource, and the radio access network device receives the ACK feedback sent by the first terminal to know that the data transmission on the SL link of the first terminal is successful. Under the condition that data transmission on the SL link fails, the method may further include that the first terminal sends NACK feedback to the radio access network device in the first UL resource, and the radio access network device receives the NACK feedback sent by the first terminal to know that the data transmission on the SL link by the first terminal fails.

Optionally, as shown in fig. 4, the method may further include steps S307 to S310. The embodiment of the present application does not limit the execution sequence of steps S301 to S310.

S307, the radio access network equipment sends first resource configuration information to the first terminal, wherein the first resource configuration information carries the first side-link SL resource and the transmission time interval of the first SL resource.

Illustratively, the first SL resource is a semi-persistent scheduling SPS resource or a configuration grant CG resource. The transmission time interval of the first SL resource is the period of SPS/CG or the interval of two resources in the SPS/CG configuration information.

Illustratively, the first resource configuration information may be carried in a first radio resource control, RRC, message.

For example, when the first indication information is carried in the first RRC message, step S302 and step S307 may be combined into one step, that is, the first RRC message is sent to the first terminal by the radio access network device, where the first RRC message carries the first resource configuration information and the first indication information.

S308, the first terminal receives the first resource configuration information.

For example, in the embodiment of the present application, with SPS/CG of type2, after receiving RRC signaling sent by a radio access network device (e.g., a base station), a first terminal does not take effect in configuration, and needs to activate or deactivate to use the configured resource.

For example, when the first indication information is carried in the first RRC message, step S303 and step S308 may be combined into one step, that is, the first terminal receives the first RRC message sent by the radio access network device, where the first RRC message carries the first resource configuration information and the first indication information.

S309, the wireless access network equipment sends second indication information to the first terminal.

The second indication information is used for indicating the first terminal to activate or deactivate the first SL resource allocated by the radio access network device.

For example, the second indication information may be carried in a second DCI, where the second DCI activates/deactivates the first SL resource (SPS/CG resource).

For example, when the first indication information is carried in the second DCI, step S302 and step S309 may be combined into one step, that is, the radio access network device sends the second DCI to the first terminal, where the second DCI carries the first indication information and the second indication information.

And S310, the first terminal receives the second indication information.

Optionally, after receiving the second indication information, the first terminal may activate or deactivate the SPS/CG resource configured by the base station in the RRC signaling according to the second indication information.

For example, when the first indication information is carried in the second DCI, step S303 and step S310 may be combined into one step, that is, the first terminal receives the second DCI sent by the radio access network device, where the second DCI carries the first indication information and the second indication information.

It can be understood that, in this embodiment of the present application, first indication information indicating whether the first terminal sends the acknowledgement feedback may be carried in the second DCI that activates or deactivates the first SL resource, may also be carried in the RRC message, and may also be carried in the first DCI. Through the first indication information, the first terminal can send acknowledgement feedback according to the indication of the wireless access network side. Thereby reducing unnecessary waste of resources.

Optionally, in an implementation manner, the first indication information includes first information and/or second information, and when the first indication information is carried in the first DCI, the first UL resource for sending the acknowledgement feedback is not carried in the first indication information, but is carried in third indication information, as shown in fig. 5, the method may further include steps S311-S312.

S311, the wireless access network equipment sends third indication information to the first terminal. The third indication information is used for indicating a first UL resource, and the first UL resource is used for sending acknowledgement feedback.

The first UL resource may be an UL resource allocated by the radio access network device for the first terminal to send acknowledgement feedback.

For example, the radio access network device may allocate a first uplink UL resource for the first terminal, the first UL resource being used for transmission of the SL CG activation/deactivation feedback acknowledgement. I.e. the first terminal may send acknowledgement feedback on the first UL resource allocated by the radio access network device.

Optionally, the first UL resource may also be used for the first terminal to send HARQ feedback. The HARQ feedback is used to indicate whether the first terminal successfully transmits data in the first SL resource. Optionally, the first UL resource may be a PUCCH resource or a PUSCH resource. Moreover, the PUCCH resource may be a resource specifically defined for SL SPS, and may be isolated from a PUCCH resource for Uu port, may also be overlapped, and may also be non-overlapped, which is not limited in this embodiment of the present application.

For example, the third indication information may be carried in the second DCI or the third DCI or the first RRC message. Optionally, the third DCI, the first DCI, and the second DCI are independent DCIs respectively.

Optionally, when the third indication information is carried in the third DCI, the radio access network device sends the second DCI for activation/deactivation, and then sends the third DCI carrying the first UL resource to the first terminal.

Optionally, when the third indication information is carried in the second DCI, a field may be added in the activated or deactivated second DCI, where the field carries the first UL resource. And after the wireless access network equipment sends first DCI for indicating whether to send the confirmation feedback to the first terminal, sending second DCI to the first terminal, wherein the first DCI carries first indication information, and the second DCI carries second indication information and third indication information. In the embodiment of the present application, the order of transmitting the first DCI and the second DCI is not limited, and the first DCI is transmitted first and the second DCI is transmitted later. It can be understood that, in this implementation manner, the step S311 and the step S309 may be combined into one step, that is, the radio access network device sends the second DCI to the first terminal, where the second DCI carries the second indication information and the third indication information.

Optionally, when the third indication information is carried in the first RRC message, a field may be added in the first RRC message, where the field carries the first UL resource. It can be understood that, in this implementation manner, step S311 and step S307 may be combined into one step, that is, the radio access network device sends a first RRC message to the first terminal, where the first RRC message carries the first resource configuration information and the third indication information.

Optionally, when the third indication information is carried in the third DCI, if the first terminal receives only one of the second DCI and the third DCI. For example, the first terminal only receives the activated/deactivated second DCI, but does not receive the third DCI for allocating the uplink UL resource, and the first terminal does not know when the radio access network device allocates the uplink UL resource, and may need to wait all the time.

For example, the sending, by the radio access network device, the third indication information to the first terminal in step S311 may include: and the wireless access network equipment sends third indication information to the first terminal within a first preset time length from the beginning of sending the second indication information to the first terminal by the wireless access network equipment. For example, a timer on the radio access network device side starts timing when sending the second indication information to the first terminal, and before a first preset duration of the timer is reached, the radio access network device sends the third indication information to the first terminal, so that the first terminal can know the time for sending the uplink UL resource by the network side, and the waiting time of the first terminal is reduced.

It can be understood that, in the embodiment of the present application, the execution order of step S311 and other steps is not limited. For example, when the third indication information is carried in the third DCI, step S311 may be performed after step S302, before step S302, or simultaneously with step S302. Fig. 5 is merely exemplary and illustrated by the step S311 being executed after the step S302.

S312, the first terminal receives the third indication information.

Illustratively, the first terminal receives a third DCI carrying third indication information.

For example, when the third indication information is carried in the third DCI, the first terminal receives the third DCI sent by the radio access network device, where the third DCI carries the third indication information. In this implementation manner, the embodiment of the present application does not limit the execution sequence of step S312 and other steps.

For example, when the third indication information is carried in the second DCI, the step S312 and the step S310 may be combined into one step. That is, the first terminal receives a second DCI sent by the radio access network device, where the second DCI carries the second indication information and the third indication information.

For example, when the third indication information is carried in the first RRC message, the step S312 and the step S308 may be combined into one step. That is, the first terminal receives a first RRC message sent by the radio access network device, where the first RRC message carries the first resource configuration information and the third indication information.

Optionally, when the third indication information is carried in the third DCI, if the first terminal does not successfully receive the third indication information within a second duration from the reception of the first indication information sent by the radio access network device, after step S311, the method further includes: the first terminal sends resource request information to the wireless access network equipment, wherein the resource request information is used for requesting first UL resources, and the first UL resources are used for the first terminal to send confirmation feedback to the wireless access network equipment.

Optionally, when the first terminal does not receive the UL resource allocated by the radio access network device within the preset time period, the first terminal may send resource request information to the radio access network device, where the resource request information is used to request the radio access network device to allocate an uplink UL resource for sending the acknowledgement feedback. Optionally, after receiving the resource request information sent by the first terminal, the radio access network device may allocate uplink UL resources to the terminal, and send the uplink UL resources to the first terminal.

In this embodiment, the first UL resource allocated by the radio access network device may be independently carried in the third DCI, and the third DCI may be sent within the preset time period after the second DCI is sent, so that the first terminal may request the UL resource from the radio access network device if the first terminal does not receive the third DCI within the preset time period, and the first terminal does not need to wait for the radio access network device to allocate the UL resource.

The above description has mainly introduced the scheme provided in the embodiments of the present application from the perspective of method steps. It will be appreciated that the communication device, in order to implement the above-described functions, comprises corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present application is capable of implementing the exemplary modules and algorithm steps described in connection with the embodiments disclosed herein in a combination of hardware and computer software. 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.

In the embodiment of the present application, the communication device may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing each function module according to each function, fig. 6 shows a schematic diagram of a possible structure of a terminal device, which may be the first terminal in the above embodiment. The terminal device 600 includes: processing section 601 and transmitting/receiving section 602. The processing unit 601 is used for controlling and managing the operation of the terminal device 600. For example, processing unit 601 may be used to perform step S304 in fig. 3, and/or other processes for the techniques described herein. The transceiving unit 602 is used for transceiving information or for communicating with other network elements. For example, the transceiving unit 602 may be used to perform steps S303 and S305 in fig. 3, or S308 and S310 in fig. 4, or S312 in fig. 5, and/or other processes for the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 7 shows a possible structure diagram of a radio access network device in the case of adopting a functional module divided for each function. The radio access network apparatus 700 includes: a processing unit 701 and a transceiving unit 702. The processing unit 701 is configured to control and manage an operation of the radio access network device 700. For example, the processing unit 701 may be configured to execute S301 in fig. 3. The transceiving unit 702 is used for transceiving information or for communicating with other network elements. For example, the transceiving unit 702 may be configured to perform steps S302 and S306 in fig. 3, or S307 and S309 in fig. 4, or S311 in fig. 5. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the case of an integrated unit, fig. 8 shows a possible structural diagram of a terminal device, which may be the first terminal in the above-described embodiment. The terminal apparatus 800 includes: a processor 801 and a transceiver 802, the processor 801 being configured to control and manage actions of the terminal apparatus 800, for example, the processor 801 may be configured to execute S304 in fig. 3, and/or other processes for the techniques described herein. The transceiver 802 is used for transmitting and receiving information or for communicating with other network elements. For example, transceiver 802 is configured to perform steps S303 and S305 in fig. 3, or S308 and S310 in fig. 4, or S312 in fig. 5, and/or other processes for the techniques described herein. Optionally, the terminal apparatus 800 may further include a memory 803, and the memory 803 is configured to store program codes and data corresponding to the terminal apparatus 800 executing any one of the communication methods provided above. The memory 803 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM), or the like. The terminal apparatus 800 may be the terminal apparatus 200 shown in fig. 2, and the description of all relevant contents of the components related to fig. 2 may be referred to the functional description of the corresponding components in fig. 8, and will not be described herein again.

In the case of integrated units, fig. 9 shows a possible architecture diagram of a radio access network device. The radio access network apparatus 900 includes: a processor 901 and a transceiver 902, the processor 901 is configured to control and manage the operation of the radio access network apparatus 900. For example, processor 901 may be used to perform step S301 in fig. 3, and/or other processes for the techniques described herein. The transceiver 902 is used for transmitting and receiving information or for communicating with other network elements. For example, the transceiver 902 may be used to perform steps S302 and S306 in fig. 3, or S307 and S309 in fig. 4, or S311 in fig. 5, and/or other processes for the techniques described herein. Optionally, the radio access network device 900 may further include a memory 903, where the memory 903 is configured to store program codes and data corresponding to the radio access network device 900 executing any one of the communication methods provided above. The memory 903 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM), or the like.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Erasable Programmable read-only Memory (EPROM), Electrically Erasable Programmable read-only Memory (EEPROM), registers, a hard disk, a removable disk, a compact disc read-only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

Claims

1. A method of communication, the method comprising:

a first terminal receives first indication information sent by wireless access network equipment, wherein the first indication information is used for indicating whether the first terminal sends confirmation feedback or not; the acknowledgement feedback is used for indicating that the first terminal successfully receives second indication information sent by the radio access network device, and the second indication information is used for indicating that the first terminal activates or deactivates a first sidelink SL resource allocated by the radio access network device; the first indication information includes second information, the second information carries a first threshold, and the first threshold is used for indicating that the first terminal sends acknowledgement feedback to the radio access network device when the transmission time interval of the first SL resource is smaller than or equal to the first threshold;

and the first terminal sends the confirmation feedback according to the first indication information.

2. The method of claim 1, wherein the first indication information comprises third information, and wherein the third information carries a first Uplink (UL) resource, and wherein the first UL resource is used for sending the acknowledgement feedback.

3. The method of claim 1, further comprising:

the first terminal receives third indication information sent by the radio access network equipment, wherein the third indication information is used for indicating a first UL resource, and the first UL resource is used for sending the acknowledgement feedback.

4. A method according to claim 2 or 3, characterized in that the method further comprises:

and the first terminal sends hybrid automatic repeat request (HARQ) feedback to the wireless access network equipment at the first UL resource, wherein the HARQ feedback is used for indicating whether the first terminal successfully sends or receives data at the first SL resource.

5. A method of communication, the method comprising:

the wireless access network equipment determines first indication information, wherein the first indication information is used for indicating whether the first terminal sends confirmation feedback or not; the acknowledgement feedback is used for indicating that the first terminal successfully receives second indication information sent by the radio access network device, and the second indication information is used for indicating that the first terminal activates or deactivates a first Sidelink (SL) resource allocated by the radio access network device; the first indication information includes second information, the second information carries a first threshold, and the first threshold is used for indicating that the first terminal sends acknowledgement feedback to the radio access network device when the time interval of the first SL resource is less than or equal to the first threshold;

and the wireless access network equipment sends the first indication information to the first terminal.

6. The method of claim 5, wherein the first indication information comprises third information, and wherein the third information carries a first Uplink (UL) resource, and wherein the first UL resource is used for sending the acknowledgement feedback.

7. The method of claim 5, further comprising:

the radio access network equipment sends third indication information to the first terminal, wherein the third indication information is used for indicating first UL resources, and the first UL resources are used for sending the acknowledgement feedback.

8. The method of claim 7, wherein the radio access network device sends third indication information to the first terminal, and wherein the third indication information comprises:

and within a first preset time length from the moment that the wireless access network equipment sends the second indication information to the first terminal, the wireless access network equipment sends the third indication information to the first terminal.

9. The method of any of claims 6-8, wherein the first UL resource is further configured to send hybrid automatic repeat request (HARQ) feedback indicating whether the first terminal successfully transmitted or received data in the first SL resource.

10. A terminal device, characterized in that the terminal device comprises: a processing unit and a transceiver unit;

the transceiver unit is configured to receive first indication information sent by a radio access network device, where the first indication information is used to indicate whether the terminal apparatus sends an acknowledgement feedback; the acknowledgement feedback is used for indicating that the terminal device successfully receives second indication information sent by the radio access network equipment, and the second indication information is used for indicating that the terminal device activates or deactivates a first sidelink SL resource allocated by the radio access network equipment; the first indication information includes second information, where the second information carries a first threshold, and the first threshold is used to indicate that the terminal device sends acknowledgement feedback to the radio access network device when the transmission time interval of the first SL resource is less than or equal to the first threshold;

and the processing unit is used for sending the confirmation feedback according to the first indication information.

11. The terminal apparatus of claim 10, wherein the first indication information comprises third information, and wherein the third information carries a first Uplink (UL) resource, and wherein the first UL resource is used for sending the acknowledgement feedback.

12. The terminal apparatus according to claim 10, wherein the transceiver unit is further configured to:

receiving third indication information sent by the radio access network equipment, where the third indication information is used to indicate a first UL resource, and the first UL resource is used to send the acknowledgement feedback.

13. The terminal apparatus according to claim 11 or 12, wherein the transceiver unit is further configured to:

and sending hybrid automatic repeat request (HARQ) feedback to the wireless access network equipment at the first UL resource, wherein the HARQ feedback is used for indicating whether the terminal device successfully sends or receives data at the first SL resource.

14. A radio access network device, characterized in that the radio access network device comprises: a processing unit and a transceiver unit;

the processing unit is configured to determine first indication information, where the first indication information is used to indicate whether the first terminal sends the acknowledgement feedback; the acknowledgement feedback is used for indicating that the first terminal successfully receives second indication information sent by the transceiver unit, and the second indication information is used for indicating that the first terminal activates or deactivates a first Sidelink (SL) resource allocated by the radio access network device; the first indication information includes second information, the second information carries a first threshold, and the first threshold is used for indicating that the first terminal sends acknowledgement feedback to the radio access network device when the time interval of the first SL resource is less than or equal to the first threshold;

the transceiver unit is configured to send the first indication information to the first terminal.

15. The radio access network device of claim 14, wherein the first indication information comprises third information, the third information carrying first Uplink (UL) resources, the first UL resources being used for sending the acknowledgement feedback.

16. The radio access network device according to claim 14, wherein the transceiver unit is further configured to:

and sending third indication information to the first terminal, wherein the third indication information is used for indicating a first UL resource, and the first UL resource is used for sending the acknowledgement feedback.

17. The radio access network device according to claim 16, wherein the transceiver unit is specifically configured to:

and the transceiver unit sends the third indication information to the first terminal within a first preset time period from the transmission of the second indication information to the first terminal.

18. The radio access network device according to any of claims 15-17, wherein the first UL resource is further configured to send hybrid automatic repeat request, HARQ, feedback indicating whether the first terminal successfully sent or received data in the first SL resource.

19. A computer storage medium having computer program code embodied therein, which, when run on a processor, causes the processor to perform the communication method of any one of claims 1-9.

20. A communication apparatus, characterized in that the communication apparatus comprises:

a transceiver for transceiving information or for communicating with other network elements;

a processor for executing computer program instructions to implement the communication method of any one of claims 1-9.