Wireless communication method, apparatus and system

Abstract

Embodiments of the present application provide a wireless communication method, device and system. The method comprises: obtaining mode information of a second terminal device, the mode information being used to indicate a resource scheduling manner of the second terminal device; and sending, to the second terminal device, auxiliary information according to the mode information, the auxiliary information being used to indicate one or more sets of sidelink transmission resources. Based on the scheme, the first terminal device provides the second terminal with auxiliary information used to indicate one or more sets of sidelink transmission resources based on the mode information of the second terminal device, so that the second terminal device or a network device can allocate or determine sidelink transmission resources for the second terminal device to transmit sidelink data based on the one or more sets of sidelink transmission resources indicated by reference to the auxiliary information, which can reduce the occurrence of resource conflict or resource waste, thereby achieving reasonable and effective allocation of sidelink transmission resources, and further improving the efficiency of sidelink communication.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of communication, and in particular, to a wireless communication method, apparatus and system. BACKGROUND

[0002] In a wireless communication system, terminal devices can communicate with each other through a network device, or directly communicate with each other without the help of the network device. The interface between the terminal devices is called PC5 interface, similar to the Uu interface between the terminal device and the network device. The link between the terminal devices is called sidelink (SL).

[0003] One typical application scenario of sidelink communication is vehicle to everything (V2X). In V2X, a vehicle or a road side unit (RSU) is a terminal device, and the terminal device can directly transmit data with another terminal device through sidelink without going through the network device, which can effectively reduce the communication delay. As shown in Figure 1 Figure 1 A schematic diagram for direct communication between terminal devices through PC5 interface.

[0004] Before the terminal devices communicate with each other, the sidelink transmission resource needs to be allocated to the terminal device on the sending side, so that the terminal device on the sending side can send sidelink data to the terminal device on the receiving side on the allocated sidelink transmission resource.

[0005] How to reasonably and effectively allocate sidelink transmission resources and improve the efficiency of sidelink communication is a problem to be solved at present. SUMMARY

[0006] Embodiments of the present application provide a wireless communication method, apparatus and system to reasonably and effectively allocate sidelink transmission resources and improve the efficiency of sidelink communication.

[0007] For example, in the embodiments of the present application, a certain information, such as information A, used to indicate another information or feature, such as information B, can include any of the following cases:

[0008] Information A includes information B;

[0009] ​The index or identification information indicating the information B, for example, the information A indicates the information B from one or more candidate information B, each of the one or more candidate information B corresponds to a unique index for identifying the candidate information B; or the information A is used to determine the information B, for example, the information B can be obtained by performing mathematical operation or filtering on the information A.

[0010] It should be noted that the "dedicated" or "dedicated" in the following embodiments of the present application can be understood as designated, network configured or protocol predefined. "Dedicated" can also be expressed as "specific", "designated" and the like. For example, the "dedicated scheduling request" in the embodiments of the present application can also be expressed as "specific scheduling request", "designated scheduling request" and the like, which means that the scheduling request is limited to a certain specific purpose and cannot be used for other purposes. For another example, the "dedicated resource" in the embodiments of the present application can also be expressed as "specific resource", "designated resource" and the like, which means that the resource is limited to a certain specific purpose and cannot be used for other purposes. For specific description, please refer to the specific description in the following embodiments. For another example, the "dedicated buffer status report" in the embodiments of the present application can also be expressed as "specific buffer status report", "designated buffer status report" and the like, which means that the resource is limited to a certain specific purpose and cannot be used for other purposes. For specific description, please refer to the specific description in the following embodiments.

[0011] It should be noted that in actual use, the "dedicated scheduling request" can also be directly simplified as "scheduling request", the "dedicated resource" can also be directly simplified as "resource", and the "dedicated buffer status report" can also be directly simplified as "buffer status report".

[0012] In a first aspect, the embodiments of the present application provide a wireless communication method, which can be executed by a first terminal device or a chip, and the method comprises the following steps: obtaining mode information of a second terminal device, the mode information being used to indicate a resource scheduling mode of the second terminal device; and sending, according to the mode information, auxiliary information to the second terminal device, the auxiliary information being used to indicate one or more sets of sidelink transmission resources.

[0013] Based on the above scheme, the first terminal device provides the second terminal with auxiliary information used to indicate one or more sets of sidelink transmission resources based on the mode information of the second terminal, so that the second terminal device or the network device can allocate or determine the sidelink transmission resources used for the second terminal device to transmit sidelink data based on the one or more sets of sidelink transmission resources indicated by reference to the auxiliary information, which can reduce the occurrence of resource conflict or resource waste, thereby realizing reasonable and effective allocation of sidelink transmission resources, and further improving the efficiency of sidelink communication.

[0014] As a possible implementation method, the obtaining the mode information of the second terminal device comprises: receiving the mode information from the second terminal device.

[0015] Based on the implementation method, the first terminal device can directly obtain the mode information of the second terminal device from the second terminal device, so as to accurately obtain the mode information of the second terminal device.

[0016] As another possible implementation method, the obtaining the mode information of the second terminal device comprises: receiving the mode information of the second terminal from the network device.

[0017] Based on the implementation method, the first terminal device does not need to obtain the mode information of the second terminal device from the second terminal device, but obtains the mode information of the second terminal device from the network device, so as to reduce the interaction between terminal devices, reduce the energy consumption of the second terminal device, and reduce the signaling overhead on the sidelink.

[0018] As another possible implementation method, the obtaining the mode information of the second terminal device comprises: obtaining the mode information of the second terminal device from the first terminal device, wherein the mode information in the first terminal device is preconfigured.

[0019] Based on the implementation method, the mode information of the second terminal device is preconfigured in the first terminal device, so that the first terminal device does not need to obtain the mode information of the second terminal device from an external device, reducing the interaction between the first terminal device and the external device, thereby reducing the energy consumption of the first terminal device.

[0020] As a possible implementation method, a first request is sent to the second terminal device, and the first request is used to request to obtain the mode information.

[0021] Based on the implementation method, when the first terminal device needs to obtain the mode information of the second terminal device, a first request is sent to the second terminal device, so that the second terminal device sends the mode information of the second terminal device to the first terminal device based on the first request, thereby avoiding that when the first terminal device does not need the mode information of the second terminal device, the second terminal device still sends the mode information of the second terminal device to the first terminal device, so as to reduce unnecessary overhead.

[0022] As a possible implementation method, the sending the assistance information to the second terminal device according to the mode information comprises: determining that the mode information indicates that the second terminal device is in a network device scheduling mode and an autonomous competition mode, and sending the assistance information to the second terminal device; or determining that the mode information indicates that the second terminal device is in the autonomous competition mode, and sending the assistance information to the second terminal device.

[0023] Based on the above scheme, only when it is determined that the second terminal device is in the network device scheduling mode and the autonomous competition mode, or in the autonomous competition mode, the auxiliary information is sent to the second terminal device, which can avoid sending the auxiliary information to the second terminal device when the second terminal device does not need the auxiliary information, thereby reducing unnecessary information interaction and energy consumption.

[0024] As a possible implementation method, the first sidelink transmission resource used for sending the auxiliary information is acquired; and the auxiliary information is sent to the second terminal device according to the mode information, including: according to the mode information, the first information carrying the auxiliary information is sent to the second terminal device on the first sidelink transmission resource.

[0025] As a possible implementation method, the first sidelink transmission resource used for sending the auxiliary information is acquired, including: a dedicated scheduling request is sent to the network device on a dedicated resource, the dedicated scheduling request being used for requesting allocation of a sidelink transmission resource used for sending the first information; and the first sidelink transmission resource is received from the network device.

[0026] As a possible implementation method, the dedicated resource is determined according to the format of the first information; wherein the dedicated resources corresponding to different formats of the first information are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different formats of the first information are different.

[0027] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0028] As a possible implementation method, the dedicated resource is determined according to the size of the first information; wherein the dedicated resources corresponding to different sizes of the first information are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different sizes of the first information are different.

[0029] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0030] As a possible implementation method, the size of the first sidelink transmission resource is determined to be smaller than the size of the sidelink transmission resource required by the auxiliary information to be transmitted, and then the first information carrying the auxiliary information is generated, and the auxiliary information carried by the first information is less than the auxiliary information to be transmitted.

[0031] As a possible implementation method, the acquiring the first sidelink transmission resource for transmitting the assistance information comprises: sending a buffer status report to a network device, the buffer status report being used for requesting allocation of a sidelink transmission resource for transmitting the first information, the buffer status report indicating a size of the assistance information to be transmitted; and receiving the first sidelink transmission resource from the network device.

[0032] As another possible implementation method, the acquiring the first sidelink transmission resource for transmitting the assistance information comprises: sending a scheduling request to a network device on a non-dedicated resource (which can be a common resource), the scheduling request being used for requesting allocation of a sidelink transmission resource for transmitting the first information; and receiving the first sidelink transmission resource from the network device.

[0033] As a possible implementation method, the non-dedicated resource is determined according to a format of the first information; wherein the non-dedicated resource corresponding to different formats of the first information is different, and the size of the sidelink transmission resource indicated by the assistance information carried by different formats of the first information is different.

[0034] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0035] As a possible implementation method, the non-dedicated resource is determined according to a size of the first information; wherein the non-dedicated resource corresponding to different sizes of the first information is different, and the size of the sidelink transmission resource indicated by the assistance information carried by different sizes of the first information is different.

[0036] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0037] As a possible implementation method, the buffer status report carries a dedicated target index, the dedicated target index being used for requesting allocation of a sidelink transmission resource for transmitting the assistance information, and the dedicated target index corresponding to the size of the assistance information to be transmitted.

[0038] As a possible implementation method, the buffer status report carries a dedicated logical channel group identifier, the dedicated logical channel group identifier being used for requesting allocation of a sidelink transmission resource for transmitting the assistance information, and the dedicated logical channel group identifier corresponding to the size of the assistance information to be transmitted.

[0039] As a possible implementation method, the buffer status report is a dedicated buffer status report.

[0040] As a possible implementation method, the target index carried by the buffer status report can also be a non-dedicated target index, for example, a common target index, which can be used to request allocation of sidelink transmission resources for sending auxiliary information.

[0041] As a possible implementation method, the logical channel group identifier carried by the buffer status report can also be a non-dedicated logical channel group identifier, for example, a common logical channel group identifier, which can be used to request allocation of sidelink transmission resources for sending auxiliary information.

[0042] As a possible implementation method, the buffer status report is a non-dedicated buffer status report. For example, it is a common buffer status report.

[0043] As a possible implementation method, the first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

[0044] As a possible implementation method, the first information is a two-level SCI, which includes a first-level SCI and a second-level SCI, and the indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI. For example, the indication information can specifically indicate the format of the second-level SCI, or indicate the size of the second-level SCI, or indicate that the second-level SCI is a normal SCI or a truncated SCI.

[0045] As a possible implementation method, the first information is a two-level SCI, which includes a first-level SCI and a second-level SCI, and the auxiliary information is carried in the first-level SCI.

[0046] As a possible implementation method, according to the mode information, before sending the auxiliary information to the second terminal device, the method further includes: determining that a preset policy condition is met; wherein the preset policy condition includes that the value of one or more parameters of CBR, RSRP, RSRQ, RSSI, SINR or power of the first terminal device reaches a preset threshold or range.

[0047] In a second aspect, the embodiments of the present application provide a wireless communication method, which can be executed by a second terminal device or a chip, and the method includes the following steps: receiving auxiliary information from a first terminal device, the auxiliary information being used to indicate one or more sets of sidelink transmission resources; processing the auxiliary information according to mode information of the second terminal device, the mode information being used to indicate a resource scheduling mode of the second terminal device.

[0048] Based on the above scheme, the first terminal device provides the second terminal with assistance information indicating one or more sidelink transmission resources based on the mode information of the second terminal device, so that the second terminal device or the network device can determine or allocate sidelink transmission resources for the second terminal device to transmit sidelink data based on the one or more sidelink transmission resources indicated by the assistance information, which can reduce the occurrence of resource conflict or resource waste, thereby realizing reasonable and effective allocation of sidelink transmission resources, and further improving the efficiency of sidelink communication.

[0049] As a possible implementation method, the processing of the assistance information based on the mode information of the second terminal device includes: the mode information indicates that the second terminal device is in an autonomous competition mode, and the first sidelink transmission resource for transmitting sidelink data of the second terminal device is determined based on the assistance information.

[0050] As a possible implementation method, the processing of the assistance information based on the mode information of the second terminal device includes: the mode information indicates that the second terminal device is in an autonomous competition mode and a network device scheduling mode, or is in a network device scheduling mode, and the assistance information is sent to the network device, the assistance information is used for generation of the first sidelink transmission resource, and the first sidelink transmission resource is used for transmitting sidelink data of the second terminal device.

[0051] As a possible implementation method, the one or more sidelink transmission resources indicated by the assistance information include preferred sidelink transmission resources, the first sidelink transmission resource corresponds to the preferred sidelink transmission resource, and the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device.

[0052] Based on the scheme, since the sidelink resource used by the second terminal device to send sidelink data to the first terminal device is determined based on the preferred sidelink resource provided by the first terminal device, the sidelink resource that can be used to send sidelink data to the first terminal device can be quickly determined, and the occurrence of resource conflict or resource waste can be reduced.

[0053] As a possible implementation method, the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, including: the target terminal device selected based on a sidelink logical channel priority mechanism includes the first terminal device.

[0054] As a possible implementation method, the sidelink transmission resource set or multiple sidelink transmission resource sets indicated by the assistance information comprises a sidelink transmission resource which is preferred not to be used, the first sidelink transmission resource corresponds to the sidelink transmission resource which is preferred not to be used, and the first sidelink transmission resource is not used for the second terminal device to send sidelink data to the first terminal device.

[0055] Based on the scheme, since the sidelink resource used for sending sidelink data is determined based on the sidelink resource which is preferred not to be used provided by the first terminal device, the sidelink resource which is preferred not to be used is avoided to be selected to send sidelink data to the first terminal device, so that the occurrence of resource conflict or resource waste can be reduced.

[0056] As a possible implementation method, the first sidelink transmission resource is not used for the second terminal device to send sidelink data to the first terminal device, comprising: the target terminal device selected based on the sidelink logical channel priority mechanism does not include the first terminal device.

[0057] As a possible implementation method, the processing of the assistance information according to the mode information of the second terminal device comprises: the mode information is used to indicate that the second terminal device is in the autonomous competition mode and the network device scheduling mode, or is in the network device scheduling mode, and the assistance information is discarded or ignored.

[0058] As a possible implementation method, the mode information is sent to the first terminal device.

[0059] Based on the implementation method, the first terminal device can directly obtain the mode information of the second terminal device from the second terminal device, so that the mode information of the second terminal device can be accurately obtained.

[0060] As a possible implementation method, a first request is received from the first terminal device, and the first request is used to request to obtain the mode information.

[0061] Based on the implementation method, when the first terminal device needs to obtain the mode information of the second terminal device, a first request is sent to the second terminal device, so that the second terminal device sends the mode information of the second terminal device to the first terminal device based on the first request, thereby avoiding the second terminal device from sending the mode information of the second terminal device to the first terminal device when the first terminal device does not need the mode information of the second terminal device, so that unnecessary overhead can be reduced.

[0062] As a possible implementation method, a second request is sent to the first terminal device, and the second request is used to request to obtain the assistance information.

[0063] Based on the implementation method, when the second terminal device needs to obtain the assistance information, a second request is sent to the first terminal device, so that the first terminal device sends the assistance information to the second terminal device based on the second request, thereby avoiding the first terminal device from sending the assistance information to the second terminal device when the second terminal device does not need the assistance information, and reducing unnecessary information overhead.

[0064] As a possible implementation method, it is determined that a preset policy condition is met, wherein the preset policy condition includes that a value of one or more parameters of CBR, RSRP, RSRQ, RSSI, SINR or power of the second terminal device reaches a preset threshold or range.

[0065] In a third aspect, an embodiment of the present application provides a wireless communication method, which can be executed by a first terminal device or a chip, and the method comprises the following steps: sending a dedicated scheduling request to a network device on a dedicated resource, wherein the dedicated scheduling request is used to request allocation of a sidelink transmission resource used for sending sidelink control information; receiving a first sidelink transmission resource from the network device; and sending, to a second terminal device, the sidelink control information on the first sidelink transmission resource, wherein the sidelink control information carries assistance information, and the assistance information is used to indicate one or more sets of sidelink transmission resources.

[0066] Based on the above scheme, the allocation of the sidelink resource used for transmitting the sidelink control information can be requested without transmitting the sidelink data, and the sidelink control information carries the assistance information used to indicate one or more sets of sidelink transmission resources, that is, the assistance information is sent to the second terminal device through the sidelink control information, so that the second terminal device or the network device can allocate or determine the sidelink transmission resource used for the second terminal device to transmit the sidelink data based on the one or more sets of sidelink transmission resources indicated by reference to the assistance information, so as to reduce the occurrence of resource conflict or resource waste, thereby realizing reasonable and effective allocation of the sidelink transmission resource, and further improving the efficiency of the sidelink communication.

[0067] As a possible implementation method, the dedicated resource is determined according to the format of the sidelink control information, wherein the dedicated resources corresponding to sidelink control information of different formats are different, and the sizes of the sidelink transmission resources indicated by the assistance information carried by the sidelink control information of different formats are different.

[0068] As a possible implementation method, the dedicated resource is determined according to the size of the sidelink control information, wherein the dedicated resources corresponding to sidelink control information of different sizes are different, and the sizes of the sidelink transmission resources indicated by the assistance information carried by the sidelink control information of different sizes are different.

[0069] Based on the above scheme, different sizes of sidelink transmission resources can be transmitted, and the size diversity of the sidelink transmission resources can be achieved.

[0070] As a possible implementation method, the size of the first sidelink transmission resource is determined to be smaller than the size of the sidelink transmission resource required by the auxiliary information to be transmitted, and the truncated sidelink control information is generated, and the auxiliary information carried by the sidelink control information is less than the auxiliary information to be transmitted.

[0071] As an implementation method, a scheduling request can also be sent to the network device on a non-dedicated resource (such as a common resource), and the scheduling request is used to request allocation of a sidelink transmission resource for transmitting sidelink control information; a first sidelink transmission resource is received from the network device; and the sidelink control information is sent to the second terminal device on the first sidelink transmission resource, the sidelink control information carries auxiliary information, and the auxiliary information is used to indicate one or more sets of sidelink transmission resources.

[0072] As a possible implementation method, the non-dedicated resource is determined according to the format of the sidelink control information; wherein the non-dedicated resources corresponding to sidelink control information of different formats are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by the sidelink control information of different formats are different.

[0073] As a possible implementation method, the non-dedicated resource is determined according to the size of the sidelink control information; wherein the non-dedicated resources corresponding to sidelink control information of different sizes are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by the sidelink control information of different sizes are different.

[0074] Based on the above scheme, different sizes of sidelink transmission resources can be transmitted, and the size diversity of the sidelink transmission resources can be achieved.

[0075] In a fourth aspect, an embodiment of the present application provides a wireless communication method, which can be executed by a first terminal device or a chip, and the method comprises the following steps: sending a buffer status report to a network device, the buffer status report being used to request allocation of a sidelink transmission resource for transmitting sidelink control information, and the buffer status report indicating the size of auxiliary information to be transmitted; receiving a first sidelink transmission resource from the network device; and sending the sidelink control information to a second terminal device on the first sidelink transmission resource, the sidelink control information carrying auxiliary information, and the auxiliary information being used to indicate one or more sets of sidelink transmission resources.

[0076] Based on the above scheme, the sidelink resource for transmitting the sidelink control information carrying the one or more sets of sidelink transmission resources can be requested to be allocated through the buffer status report, that is, the sidelink control information is used to send the assistance information to the second terminal device, so that the second terminal device or the network device can allocate or determine the sidelink transmission resource for the second terminal device to transmit the sidelink data based on the one or more sets of sidelink transmission resources indicated by the assistance information, which can reduce the occurrence of resource conflict or resource waste, so as to reasonably and effectively allocate the sidelink transmission resource, and further improve the efficiency of the sidelink communication.

[0077] As a possible implementation method, the buffer status report carries a dedicated target index, which is used to request allocation of the sidelink transmission resource for sending the assistance information, and the dedicated target index corresponds to the size of the to-be-transmitted assistance information.

[0078] As a possible implementation method, the target index carried by the buffer status report can also be a non-dedicated target index, for example, a common target index, which can be used to request allocation of the sidelink transmission resource for sending the assistance information.

[0079] As a possible implementation method, the logical channel group identifier carried by the buffer status report can also be a non-dedicated logical channel group identifier, for example, a common logical channel group identifier, which can be used to request allocation of the sidelink transmission resource for sending the assistance information.

[0080] As a possible implementation method, the buffer status report is a non-dedicated buffer status report. For example, it is a common buffer status report.

[0081] As a possible implementation method, the buffer status report carries a dedicated logical channel group identifier, which is used to request allocation of the sidelink transmission resource for sending the assistance information, and the dedicated logical channel group identifier corresponds to the size of the to-be-transmitted assistance information.

[0082] As a possible implementation method, the buffer status report is a dedicated buffer status report.

[0083] Based on the above third aspect or fourth aspect:

[0084] As a possible implementation method, mode information from the second terminal device is received, which is used to indicate that the second terminal device is in an autonomous competition mode, or in a self-competition mode and a network device scheduling mode.

[0085] As a possible implementation method, a first request is sent to the second terminal device, the first request being used to request to obtain the mode information.

[0086] As a possible implementation method, a second request is received from the second terminal device, the second request being used to request to obtain the assistance information.

[0087] As a possible implementation method, it is determined that a preset policy condition is met; wherein the preset policy condition comprises: a value of one or more parameters in CBR, RSRP, RSRQ, RSSI, SINR or power of the first terminal device reaching a preset threshold or range.

[0088] In a fifth aspect, an embodiment of the present application provides a wireless communication method, which can be executed by a first terminal device or a chip, and the method comprises the following steps: obtaining mode information of a second terminal device, the mode information being used to indicate a resource scheduling mode of the second terminal device; and determining whether to send assistance information to the second terminal device according to the mode information, the assistance information being used to indicate one or more sidelink transmission resources.

[0089] Based on the above scheme, the first terminal device determines whether to send assistance information to the second terminal device based on the mode information of the second terminal device. In this way, the assistance information can be sent only when it is needed to send the assistance information to the second terminal device, which can reduce unnecessary signaling overhead. When the assistance information used to indicate one or more sidelink transmission resources is sent to the second terminal, the second terminal device or the network device can allocate or determine sidelink transmission resources used by the second terminal device to transmit sidelink data based on the one or more sidelink transmission resources indicated by reference to the assistance information, which can reduce the occurrence of resource conflict or resource waste, and thus can realize reasonable and effective allocation of sidelink transmission resources, and further improve the efficiency of sidelink communication.

[0090] As a possible implementation method, determining whether to send the assistance information to the second terminal device according to the mode information comprises: determining that the mode information indicates that the second terminal device is in a network device scheduling mode and an autonomous competition mode, and then determining to send the assistance information to the second terminal device; or determining that the mode information indicates that the second terminal device is in the autonomous competition mode, and then determining to send the assistance information to the second terminal device; or determining that the mode information indicates that the second terminal device is in the network device scheduling mode, and then determining not to send the assistance information to the second terminal device.

[0091] Based on the foregoing scheme, the second terminal device is sent with the assistance information only when the second terminal device is in the network device scheduling mode and the autonomous competition mode, or in the autonomous competition mode, which can avoid sending the assistance information to the second terminal device when the second terminal device does not need the assistance information, thereby reducing unnecessary information interaction and energy consumption.

[0092] As a possible implementation method, the mode information of the second terminal device is acquired by receiving the mode information from the second terminal device.

[0093] Based on the implementation method, the first terminal device can directly acquire the mode information of the second terminal device from the second terminal device, which can achieve accurate acquisition of the mode information of the second terminal device.

[0094] As another possible implementation method, the mode information of the second terminal device is acquired by receiving the mode information of the second terminal device from the network device.

[0095] Based on the implementation method, the first terminal device does not need to acquire the mode information of the second terminal device from the second terminal device, but acquires the mode information of the second terminal device from the network device, which can reduce interaction between terminal devices, reduce energy consumption of the second terminal device, and reduce signaling overhead on the sidelink.

[0096] As another possible implementation method, the mode information of the second terminal device is acquired from the first terminal device, where the mode information in the first terminal device is preconfigured.

[0097] Based on the implementation method, the mode information of the second terminal device is preconfigured in the first terminal device, which reduces interaction between the first terminal device and external devices, thereby reducing energy consumption of the first terminal device.

[0098] As a possible implementation method, a first request is sent to the second terminal device, where the first request is used to request acquisition of the mode information.

[0099] Based on the implementation method, when the first terminal device needs to acquire the mode information of the second terminal device, a first request is sent to the second terminal device, so that the second terminal device sends the mode information of the second terminal device to the first terminal device based on the first request, thereby avoiding the second terminal device from sending the mode information of the second terminal device to the first terminal device when the first terminal device does not need the mode information of the second terminal device, and reducing unnecessary overhead.

[0100] As a possible implementation method, the first sidelink transmission resource used for sending the auxiliary information is acquired; it is determined that the mode information indicates that the second terminal device is in the network device scheduling mode and the autonomous competition mode, and it is determined that the auxiliary information is sent to the second terminal device, including: it is determined that the mode information indicates that the second terminal device is in the network device scheduling mode and the autonomous competition mode, and it is determined that the auxiliary information is sent to the second terminal device on the first sidelink transmission resource.

[0101] As a possible implementation method, the first sidelink transmission resource used for sending the auxiliary information is acquired; it is determined that the mode information indicates that the second terminal device is in the autonomous competition mode, and it is determined that the auxiliary information is sent to the second terminal device, including: it is determined that the mode information indicates that the second terminal device is in the autonomous competition mode, and it is determined that the auxiliary information is sent to the second terminal device on the first sidelink transmission resource.

[0102] As a possible implementation method, the first sidelink transmission resource used for sending the auxiliary information is acquired, including: a dedicated scheduling request is sent to the network device on a dedicated resource, the dedicated scheduling request is used to request to allocate a sidelink transmission resource used for sending the first information; the first sidelink transmission resource is received from the network device.

[0103] As a possible implementation method, the dedicated resource is determined according to the format of the first information; wherein the dedicated resources corresponding to different formats of the first information are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different formats of the first information are different.

[0104] Based on the above scheme, different sizes of sidelink transmission resources can be transmitted, and the size of the sidelink transmission resource is diversified.

[0105] As a possible implementation method, the dedicated resource is determined according to the size of the first information; wherein the dedicated resources corresponding to different sizes of the first information are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different sizes of the first information are different.

[0106] Based on the above scheme, different sizes of sidelink transmission resources can be transmitted, and the size of the sidelink transmission resource is diversified.

[0107] As a possible implementation method, it is determined that the size of the first sidelink transmission resource is smaller than the size of the sidelink transmission resource required by the auxiliary information to be transmitted, and the truncated first information is generated, and the auxiliary information carried by the first information is less than the auxiliary information to be transmitted.

[0108] As a possible implementation method, the acquiring the first sidelink transmission resource for transmitting the assistance information comprises: sending a buffer status report to a network device, the buffer status report being used for requesting allocation of a sidelink transmission resource for transmitting the first information, the buffer status report indicating a size of the assistance information to be transmitted; and receiving the first sidelink transmission resource from the network device.

[0109] As another possible implementation method, the acquiring the first sidelink transmission resource for transmitting the assistance information comprises: sending a scheduling request to a network device on a non-dedicated resource (which can be a common resource), the scheduling request being used for requesting allocation of a sidelink transmission resource for transmitting the first information; and receiving the first sidelink transmission resource from the network device.

[0110] As a possible implementation method, the non-dedicated resource is determined according to a format of the first information; wherein the non-dedicated resource corresponding to different formats of the first information is different, and the size of the sidelink transmission resource indicated by the assistance information carried by different formats of the first information is different.

[0111] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0112] As a possible implementation method, the non-dedicated resource is determined according to a size of the first information; wherein the non-dedicated resource corresponding to different sizes of the first information is different, and the size of the sidelink transmission resource indicated by the assistance information carried by different sizes of the first information is different.

[0113] Based on the above scheme, transmission of sidelink transmission resources of different sizes can be realized, and the size of the sidelink transmission resource is diversified.

[0114] As a possible implementation method, the buffer status report carries a dedicated target index, the dedicated target index being used for requesting allocation of a sidelink transmission resource for transmitting the assistance information, and the dedicated target index corresponding to the size of the assistance information to be transmitted.

[0115] As a possible implementation method, the buffer status report carries a dedicated logical channel group identifier, the dedicated logical channel group identifier being used for requesting allocation of a sidelink transmission resource for transmitting the assistance information, and the dedicated logical channel group identifier corresponding to the size of the assistance information to be transmitted.

[0116] As a possible implementation method, the buffer status report is a dedicated buffer status report.

[0117] As a possible implementation method, the target index carried by the buffer status report can also be a non-dedicated target index, for example, a common target index, which can be used to request allocation of sidelink transmission resources for sending auxiliary information.

[0118] As a possible implementation method, the logical channel group identifier carried by the buffer status report can also be a non-dedicated logical channel group identifier, for example, a common logical channel group identifier, which can be used to request allocation of sidelink transmission resources for sending auxiliary information.

[0119] As a possible implementation method, the buffer status report is a non-dedicated buffer status report. For example, it is a common buffer status report.

[0120] As a possible implementation method, the first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

[0121] As a possible implementation method, the first information is a two-level SCI, which includes a first-level SCI and a second-level SCI, and the indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI. For example, the indication information can specifically indicate the format of the second-level SCI, or indicate the size of the second-level SCI, or indicate that the second-level SCI is a normal SCI or a truncated SCI.

[0122] As a possible implementation method, the first information is a two-level SCI, which includes a first-level SCI and a second-level SCI, and the auxiliary information is carried in the first-level SCI.

[0123] As a possible implementation method, before sending the auxiliary information to the second terminal device, the method further includes: determining that a preset policy condition is met; wherein the preset policy condition includes that one or more parameters of CBR, RSRP, RSRQ, RSSI, SINR or power of the first terminal device reach a preset threshold or range.

[0124] In a sixth aspect, the embodiments of the present application provide a communication apparatus, which can be a first terminal device, and can also be a chip for the first terminal device. The apparatus has the functions of implementing the implementation methods of the above-mentioned first aspect, third aspect, fourth aspect or fifth aspect. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

[0125] In a seventh aspect, an embodiment of the present application provides a communication apparatus, which can be the second terminal device, and can also be a chip for the second terminal device. The apparatus has the function of implementing the methods of the second aspect. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions.

[0126] In an eighth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a memory. The memory is used to store computer-executable instructions. When the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus performs the methods of the first to fifth aspects.

[0127] In a ninth aspect, an embodiment of the present application provides a communication apparatus, which includes units or means for performing the steps of the methods of the first to fifth aspects.

[0128] In a tenth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and an interface circuit. The processor is used to communicate with other apparatuses through the interface circuit, and perform the methods of the first to fifth aspects. The processor includes one or more.

[0129] In an eleventh aspect, an embodiment of the present application provides a communication apparatus, which includes a processor, used to be connected with a memory, and used to call programs stored in the memory, so as to perform the methods of the first to fifth aspects. The memory can be located in the apparatus, or located outside the apparatus. The processor includes one or more.

[0130] In a twelfth aspect, an embodiment of the present application further provides a computer-readable storage medium, which stores instructions. When the instructions are run on a computer, the methods of the first to fifth aspects are performed.

[0131] In a thirteenth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is run, the methods of the first to fifth aspects are performed.

[0132] In a fourteenth aspect, an embodiment of the present application further provides a chip system, which includes a processor, used to perform the methods of the first to fifth aspects.

[0133] In a fifteenth aspect, an embodiment of the present application further provides a communication system, which includes a first terminal device used to perform any of the methods of the first aspect, and / or a second terminal device used to perform any of the methods of the second aspect.

[0134] In a sixteenth aspect, the embodiments of the present application further provide a communication system, comprising a first terminal device configured to perform any of the implementation methods of the third aspect, and / or a second terminal device configured to perform any of the implementation methods of the second aspect.

[0135] In a seventeenth aspect, the embodiments of the present application further provide a communication system, comprising a first terminal device configured to perform any of the implementation methods of the fourth aspect, and / or a second terminal device configured to perform any of the implementation methods of the second aspect.

[0136] In an eighteenth aspect, the embodiments of the present application further provide a communication system, comprising a first terminal device configured to perform any of the implementation methods of the fifth aspect, and / or a second terminal device configured to perform any of the implementation methods of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0137] Figure 1 A schematic diagram of direct communication between terminal devices through a PC5 interface;

[0138] Figure 2 A SL communication scenario applicable to the embodiments of the present application;

[0139] Figure 3 A format of a SL BSR;

[0140] Figure 4 A schematic diagram of a wireless communication method provided by the embodiments of the present application;

[0141] Figure 5 A schematic diagram of a wireless communication method provided by the embodiments of the present application;

[0142] Figure 6 A schematic diagram of a wireless communication method provided by the embodiments of the present application;

[0143] Figure 7 A schematic diagram of a wireless communication method provided by the embodiments of the present application;

[0144] Figure 8 A schematic diagram of a wireless communication method provided by the embodiments of the present application;

[0145] Figure 9 A schematic diagram of a communication device provided by the embodiments of the present application;

[0146] Figure 10 A schematic diagram of a communication device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0147] In the embodiments of the present application, the terminal device is a device with wireless communication transceiving function or an apparatus or chip system in the device with wireless communication transceiving function. The terminal device in the embodiments of the present application supports sidelink communication, can be deployed on land, including indoor or outdoor, road side, handheld or vehicle-mounted; can also be deployed on water surface (such as ship, etc.); can also be deployed in the air (such as airplane, balloon and satellite, etc.). The terminal device can be a mobile phone, a pad, a computer with wireless transceiving function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, user equipment (UE), a vehicle-mounted communication device, a vehicle-mounted communication chip, a roadside unit or a communication device in the roadside unit, etc.

[0148] The network device is a device for providing wireless communication services for the terminal device, usually located on the network side. Exemplarily, the network device includes but is not limited to: a next generation base station (g nodeB, gNB) in the fifth generation (5th generation, 5G), an evolved node B (eNB), a baseband unit (BBU), a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, an apparatus for providing wireless communication services for the terminal device in the V2X communication system, etc.

[0149] As Figure 2As shown, the SL communication scenario is applicable to the embodiments of the present application. The SL supports unicast, groupcast or broadcast communication. The first terminal device and the second terminal device can be located within the coverage of the same network device, or can be located within the coverage of different network devices. Or one terminal device is located within the coverage of the network device, and the other terminal device is out-of-coverage of the network device. Or both terminal devices are out-of-coverage of the network device. The embodiments of the present application can be applied to a long term evolution (LTE) system, a new radio (NR) system or a next generation wireless local area network system, etc.

[0150] The transmission of the SL needs the terminal device to obtain resources in advance to send data. Exemplarily, the following methods can be used to obtain resources on the SL:

[0151] a) Mode 1: also known as network device scheduling mode. Similar to the Uu interface, before sending SL data, the terminal device reports a buffer status report (BSR) to the network device to tell the network device how much sidelink data to send. Then the network device allocates sidelink transmission resources of corresponding size to the terminal device through the SL grant for transmitting the sidelink data. Or for periodic services, the terminal device reports the attributes of the periodic services (including start time, period, packet size, etc.), and then the network device configures periodic sidelink transmission resources for the terminal device. Subsequently, the terminal device does not need to obtain sidelink transmission resources by frequently reporting BSR.

[0152] b) Mode 2: also known as autonomous competition mode. For example, by measuring whether each time-frequency resource in the pre-configured SL resource pool is occupied, an empty unoccupied resource is selected for transmission, which does not depend on the scheduling of the network device.

[0153] c) Mode 1 and mode 2: also known as mode 1+mode 2, or network device scheduling mode and autonomous competition mode. The terminal device in the network device scheduling mode and the autonomous competition mode can be understood as that the terminal device supports mode 1 and mode 2 at the same time, that is, the terminal device can obtain resources in the network device scheduling mode or the autonomous competition mode.

[0154] Exemplarily, the SL BSR is introduced below.

[0155] According to the mode 1 introduced above, before transmitting SL data, the terminal device reports SL BSR to the network device, informing the network device how much sidelink data to be transmitted, and then the network device allocates sidelink transmission resources of corresponding size to the terminal device through SL grant for transmitting sidelink data. For example, the format of SL BSR is as shown in the following table. Figure 3 The SL BSR includes one or more target group information, and each target group information includes a destination index, a logical channel group identifier (Logical Channel Group ID, LCG ID), and a buffer size.

[0156] The destination index is used to represent the corresponding destination, which can be a single terminal device, a group of terminal devices, or a destination obtained by converting broadcast service. That is, the destination index is used to indicate the data receiver, which can be one or more terminal devices.

[0157] The logical channel group identifier is used to indicate a group of logical channels (Logical channel, LCH), and the logical channels indicated by the logical channel group identifier have data to be transmitted.

[0158] The buffer size is used to represent the size of the effective data amount calculated according to the SL data amount. The buffer size corresponds to a logical channel group under a destination.

[0159] It should be noted that since the data transmitted to the same destination may have different priorities (for example, there are logical channel groups with different priorities), there may be the same destination index in one SL BSR, and the logical channel group identifiers corresponding to these same destination indexes are different, and different logical channel group identifiers correspond to different logical channel groups.

[0160] Multiple different destination indexes can also be included in the same SL BSR, that is, the same terminal device can simultaneously request to transmit data to multiple terminal devices.

[0161] The following introduces the SL logical channel prioritization (Logical Channel Prioritization, LCP) mechanism. It should be noted that SL LCP is only executed when transmitting new data each time.

[0162] After the terminal device obtains the sidelink transmission resource from the network device, it needs to determine which LCH data of which destination the sidelink transmission resource is used to transmit, including the following two steps:

[0163] Step 1, select the destination.

[0164] For example, the terminal device selects the destination corresponding to the LCHs with the highest priority and satisfying the first condition among the LCHs associated with unicast, groupcast and broadcast. For another example, the terminal device selects the destination corresponding to the MAC CE with the highest priority and satisfying the first condition among the MAC CEs associated with unicast, groupcast and broadcast.

[0165] The first condition can be one or more of the following: there is valid SL transmission data, SBj is greater than zero, and SL-CG type1 is allowed to be used (if it is SL grant, it corresponds to configured grant type1). SL-CG is the abbreviation of sidelink configured grant. SBj represents the number of currently available tokens in the token bucket maintained by the jth logical channel corresponding to a certain destination.

[0166] Step 2, select LCHs.

[0167] For example, the terminal device selects the LCHs associated with the selected destination in step 1 and satisfying the second condition.

[0168] The second condition can be one or more of the following: there is valid SL transmission data, SL-CG type1 is allowed to be used (if it is SL grant, it corresponds to configured grant type1), and the HARQ feedback enabled / disabled attribute is the same as that of the LCHs selected in step 1.

[0169] Based on the background technology introduction, before the terminal device and the terminal device communicate, the terminal device on the sending side needs to be allocated with sidelink transmission resources, so that the terminal device on the sending side can send sidelink data to the terminal device on the receiving side on the allocated sidelink transmission resources. In order to realize reasonable and effective allocation of sidelink transmission resources, in the embodiment of the present application, the first terminal device can send the second terminal device auxiliary information for indicating one or more sets of sidelink transmission resources, so that the second terminal device or the network device can allocate or determine the sidelink transmission resources for the second terminal device to transmit the sidelink data based on the reference of one or more sets of sidelink transmission resources indicated by the auxiliary information, which can reduce the occurrence of resource conflict or resource waste, so as to realize reasonable and effective allocation of sidelink transmission resources, and further improve the efficiency of sidelink communication.

[0170] For example, the second terminal device in mode 2 can determine the sidelink transmission resources for sending sidelink data based on the auxiliary information received from the first terminal device (the auxiliary information indicates one or more sets of sidelink transmission resources) and / or the resource pool allocated for the second terminal device in advance. As an implementation method, the one or more sets of sidelink transmission resources indicated by the auxiliary information belong to part of the resource pool allocated for the second terminal device in advance, that is, the one or more sets of sidelink transmission resources indicated by the auxiliary information are contained in the resource pool allocated for the second terminal device in advance. Of course, the present application is not limited to the relationship between the one or more sets of sidelink transmission resources indicated by the auxiliary information and the resource pool allocated for the second terminal device in advance, and there may be no corresponding relationship between them.

[0171] For another example, the second terminal device in mode 1 can send the auxiliary information received from the first terminal device to the network device, so that the network device allocates the sidelink transmission resources for the second terminal device to send sidelink data based on the reference of the auxiliary information.

[0172] For another example, the second terminal device in mode 1+mode 2 can determine the sidelink transmission resources for sending sidelink data based on the auxiliary information received from the first terminal device and / or the resource pool allocated for the second terminal device in advance; or it can also be that the second terminal device sends the auxiliary information received from the first terminal device to the network device, so that the network device allocates the sidelink transmission resources for the second terminal device to send sidelink data based on the reference of the auxiliary information.

[0173] Based on the above resource allocation mechanism, there are still some problems to be solved, such as:

[0174] Problem 1, when does the first terminal device send the auxiliary information to the second terminal device;

[0175] Problem 2, how the first terminal device sends the assistance information to the second terminal device;

[0176] Currently, when the first terminal device needs to send Pysical Sidelink Share Channel (PSSCH) data to the second terminal device, it first requests the network device for resources for sending Sidelink Control Information (SCI) and corresponding PSSCH, and the SCI is used to indicate the transmission of the PSSCH data. That is, in the background art, only when there is PSSCH data to be transmitted, the first terminal device can trigger the network device to request resources for sending SCI.

[0177] For example, if the first terminal device carries the assistance information in the SCI and sends it to the second terminal device, the following problems will exist: Since the first terminal device sends the assistance information based on the SCI, it may not be accompanied by the transmission of subsequent PSSCH data, or in other words, the first terminal device needs to send the SCI carrying the assistance information to the second terminal device, but the SCI does not indicate the transmission of subsequent PSSCH data, at this time, the first terminal device will not be able to trigger the network device to request resources for sending the SCI based on the data to be transmitted. For example, the first terminal device is in mode 1, and there is no data to be transmitted corresponding to the LCH, so it cannot request sidelink transmission resources for sending SCI through scheduling request (SR) or BSR.

[0178] Problem 3, how the second terminal device uses the assistance information for data transmission.

[0179] If the second terminal device does not define how to use the assistance information, it may not perform sidelink transmission according to the indication of the assistance information, which will affect the resource utilization and reduce the quality of sidelink transmission.

[0180] The following will introduce the solutions proposed by the present application to solve the above three problems, with reference to the accompanying drawings.

[0181] In the following embodiments, the assistance information sent by the first terminal device to the second terminal device is used to indicate one or more sets of sidelink transmission resources. As an optional implementation method, the assistance information may include, for example, the index of the sidelink transmission resource, which is used to indicate one or more sets of sidelink transmission resources. The second terminal device can use the one or more sets of sidelink transmission resources to send sidelink data to the first terminal device or other terminal devices.

[0182] It should be noted that the following embodiment one to embodiment three are used to solve different problems, and the three embodiments can be implemented independently or in combination.

[0183] Embodiment one

[0184] This embodiment is used to solve the above problem 1, that is, when does the first terminal device send the assistance information to the second terminal device.

[0185] The following three different implementation methods are given.

[0186] Reference Figure 4 The wireless communication method provided by the embodiment of the present application is shown in the figure. The method is the first implementation method for solving the above problem 1.

[0187] The method includes the following steps:

[0188] Step 401, the first terminal device acquires the mode information of the second terminal device, and the mode information is used to indicate the resource scheduling mode of the second terminal device.

[0189] Step 402, the first terminal device determines whether to send assistance information to the second terminal device according to the mode information of the second terminal device, and the assistance information is used to indicate one or more sets of sidelink transmission resources.

[0190] Among them, the mode information used to indicate the resource scheduling mode of the second terminal device is one or more of mode 1, mode 2, mode 1+mode 2. Among them, mode 1 refers to network device scheduling mode, mode 2 refers to autonomous competition mode, and mode 1+mode 2 refers to network device scheduling mode and autonomous competition mode. It is easy to understand that the mode information used to indicate the resource scheduling mode of the second terminal device can also be understood as that the mode information contains information indicating the resource scheduling mode of the second terminal device. For example, the mode information contains a field or bit indicating the resource scheduling mode of the second terminal device.

[0191] Considering that the second terminal device in mode 1 is based on network device scheduling SL resource for transmission, so the second terminal device can only use the assistance information of the first terminal device for SL transmission when it is in mode 2 or in mode 1+mode 2 (i.e. in mode 1 and mode 2 at the same time). Therefore, when the first terminal device acquires the mode information of the second terminal device as mode 1, the first terminal device determines not to send assistance information to the second terminal device. When the first terminal device acquires the mode information of the second terminal device as mode 2 or as mode 1+mode 2, the first terminal device sends assistance information to the second terminal device.

[0192] The method for the first terminal device to obtain the mode information of the second terminal device includes, but is not limited to, the following methods a to d:

[0193] Method a: The second terminal device actively sends the mode information of the second terminal device to the first terminal device.

[0194] Based on the implementation method, the second terminal device does not need to send the mode information of the second terminal device to the first terminal device based on the request of the first terminal device, but actively sends the mode information of the second terminal device to the first terminal device, thereby reducing information interaction and reducing overhead.

[0195] Method b: The first terminal device sends a mode information request message (also referred to as a first request) to the second terminal device to request to obtain the mode information of the second terminal device, and the second terminal device sends the mode information of the second terminal device to the first terminal device based on the mode information request message.

[0196] Based on the implementation method, when the first terminal device needs to obtain the mode information of the second terminal device, the first request is sent to the second terminal device, so that the second terminal device sends the mode information of the second terminal device to the first terminal device based on the first request, thereby avoiding the second terminal device from sending the mode information of the second terminal device to the first terminal device when the first terminal device does not need the mode information of the second terminal device, thereby reducing unnecessary overhead.

[0197] Optionally, when the second terminal device sends the mode information to the first terminal device, the mode information can be carried in the first information and sent to the first terminal device. The first information can be, for example, PC5-Radio Resource Control (RRC) signaling, PC5-S message, SL MAC CE, or SCI.

[0198] Method c: The first terminal device receives the mode information of the second terminal from a network device.

[0199] That is, the network device sends the mode information of the second terminal device to the first terminal device.

[0200] Based on the implementation method, the first terminal device does not need to obtain the mode information of the second terminal device from the second terminal device, but obtains the mode information of the second terminal device from the network device, thereby reducing interaction between terminal devices and reducing energy consumption of the second terminal device.

[0201] Method d: Obtain the mode information of the second terminal device from the first terminal device.

[0202] Or it is understood that the first terminal device obtains the mode information of the second terminal device locally. The mode information of the second terminal device stored in the first terminal device can be preconfigured.

[0203] According to the implementation method, the mode information of the second terminal device is preconfigured in the first terminal device, so that the first terminal device does not need to obtain the mode information of the second terminal device from an external device, the interaction between the first terminal device and the external device is reduced, and the energy consumption of the first terminal device is reduced.

[0204] Based on the above method, the transmission quality of the SL can be ensured because the second terminal device obtains the assistance information in time.

[0205] Reference Figure 5 The wireless communication method provided by the embodiments of the present application is shown in the figure. The method is a second implementation method for solving the above problem 1.

[0206] The method includes the following steps:

[0207] Step 501, the second terminal device sends an assistance information request message (also referred to as a second request) to the first terminal device, and the assistance information request message is used to request to obtain assistance information.

[0208] Step 502, the first terminal device sends the assistance information to the second terminal device based on the assistance information request message.

[0209] Based on the method, the second terminal device actively requests the first terminal device to obtain the assistance information.

[0210] Considering that the second terminal device is in mode 1 and transmits based on the SL resource scheduled by the network device, the second terminal device can only use the assistance information of the first terminal device for SL transmission when it is in mode 2 or in mode 1+mode 2 (both in mode 1 and in mode 2). Therefore, as an implementation method, the second terminal device sends the assistance information request message to the first terminal device only when the mode information of the second terminal device is mode 2 or mode 1+mode 2. As another implementation method, the second terminal device can send the assistance information request message to the first terminal device regardless of the mode information of the second terminal device being mode 1, mode 2 or mode 1+mode 2.

[0211] As an implementation method, when the second terminal device meets a preset policy condition, the second terminal device sends an assistance information request message to the first terminal device. The preset policy condition can be that one or more parameters such as a channel busy ratio (CBR), a reference signal receiving power (RSRP), a reference signal receiving quality (RSRQ), a received signal strength indication (RSSI), a signal to interference plus noise ratio (SINR), or a power level reach a preset threshold or range. For example, when the CBR of the second terminal device is within a preset CBR range or greater than or equal to a preset CBR threshold, the second terminal device sends an assistance information request message to the first terminal device. The preset condition can also include that the second terminal device is in mode 2 or in mode 1 + mode 2.

[0212] Optionally, the preset policy condition can be configured to the second terminal device through an RRC message or RRC dedicated information, or configured to the second terminal device through a system information block (SIB), or pre-configured to the second terminal device, or protocol predefined. The pre-configuration can be, for example, a core network configuration or a V2X application server configuration, for example, a configuration when initially accessing the network. Optionally, the pre-configured preset policy condition can be updated and modified, and the preset policy conditions pre-configured for different terminal devices can be different. The protocol predefined preset policy condition cannot be changed, and the protocol predefined preset policy condition is the same in different terminal devices.

[0213] Based on the above method, the first terminal device sends assistance information to the second terminal device only when the assistance information request message of the second terminal device is received, thereby avoiding unnecessary information interaction and reducing resource waste. Moreover, the second terminal device can obtain the assistance information in time, thereby ensuring the transmission quality of the SL.

[0214] Reference Figure 6 The wireless communication method provided by the embodiments of the present application is shown in the figure. The method is a third implementation method for solving the above problem 1.

[0215] The method includes the following steps:

[0216] Step 601, the first terminal device determines that a preset policy condition is met.

[0217] This step is an optional step.

[0218] The preset policy condition can be that one or more parameters such as CBR, RSRP, RSRQ, RSSI, SINR, power, etc. reach a preset threshold or range. For example, when the CBR of the first terminal device is within a preset CBR range or greater than or equal to a preset CBR threshold, the first terminal device sends the second terminal device auxiliary information.

[0219] Optionally, the preset policy condition can be configured to the first terminal device by RRC dedicated information, or configured to the first terminal device by SIB, or preconfigured to the first terminal device, or protocol predefined.

[0220] Step 602, the first terminal device sends auxiliary information to the second terminal device.

[0221] The above scheme is that the first terminal device sends auxiliary information to the second terminal device when it is determined that the preset policy condition is met. As another implementation method, the first terminal device can also periodically send auxiliary information to the second terminal device.

[0222] Based on the above method, the first terminal device can actively send auxiliary information to the second terminal device based on its own judgment, which can reduce information interaction and thus reduce resource waste. And because the second terminal device obtains the auxiliary information in time, the transmission quality of SL can be guaranteed.

[0223] Embodiment two

[0224] This embodiment is used to solve the above problem 2, that is, how the first terminal device sends auxiliary information to the second terminal device.

[0225] In this embodiment, the first terminal device is in mode 1, and the first terminal device sends auxiliary information to the second terminal device based on SCI. Based on the foregoing analysis, because the SCI is not associated with the transmission of subsequent PSSCH data, it is not possible to trigger SR or BSR to request sidelink transmission resources from the network device according to the prior art, so there is no sidelink transmission resource to send auxiliary information. To solve this problem, the first terminal device can obtain a first sidelink transmission resource for sending auxiliary information. Then, the first terminal device sends first information to the second terminal device on the first sidelink transmission resource, and the first information carries auxiliary information, and the auxiliary information is used to indicate one or more sets of sidelink transmission resources. Optionally, the first information can be, for example, PC5-RRC signaling, PC5-S message, SL MAC CE or SCI.

[0226] For ease of illustration, the first information is taken as SCI as an example for illustration.

[0227] Two different implementation methods for the first terminal device to obtain the first sidelink transmission resource for transmitting the assistance information are given below.

[0228] Reference Figure 7 A wireless communication method is provided for the embodiments of the present application. The method is the first implementation method for the first terminal device to obtain the first sidelink transmission resource for transmitting the assistance information.

[0229] The method includes the following steps:

[0230] Step 701, the first terminal device sends a dedicated scheduling request (dedicated SR) to the network device on a dedicated resource, and the dedicated scheduling request is used to request allocation of a sidelink transmission resource for transmitting SCI.

[0231] Step 702, the first terminal device receives the first sidelink transmission resource from the network device.

[0232] Based on the above scheme, a dedicated configuration is associated with the SCI for transmitting the assistance information in advance, and the first terminal device requests the network device to allocate the sidelink transmission resource for transmitting the assistance information based on the dedicated SR configuration.

[0233] For example, the protocol predefines or the network device configures the SR ID corresponding to the SCI. When the first terminal device sends the SR to the network device on the resource corresponding to the SR ID, the network device can know that the first terminal device requests the sidelink transmission resource for transmitting the assistance information based on the resource, and then can configure the corresponding sidelink transmission resource for the first terminal device.

[0234] Optionally, considering that the assistance information may indicate multiple sets of sidelink resources, the number of sidelink transmission resources indicated by the assistance information transmitted by the SCI each time may be different, and therefore the size of the sidelink transmission resource requested from the network device for transmitting the assistance information may be different. Therefore, it is necessary to clearly indicate how the network device accurately configures the sidelink transmission resource of the corresponding size. Three different implementation methods are given below:

[0235] As a first implementation method, a plurality of SCI formats (SCI format) can be defined in advance, one SCI format can correspond to transmission of one or more sets of sidelink transmission resources, and SCIs of different formats carry different sizes of sidelink transmission resources indicated by the assistance information. For example, SCI format 1 corresponds to transmission of one set of sidelink transmission resources, SCI format 2 corresponds to transmission of two sets of sidelink transmission resources, and so on. In addition, different formats of SCIs correspond to different dedicated resources, for example, SCI format 1 corresponds to a dedicated SR configuration: SR ID 1, resource 1, and SCI format 2 corresponds to a dedicated SR configuration: SR ID 2, resource 2. For example, the first terminal device can determine the format of the corresponding SCI according to the size of the assistance information to be transmitted, then determine the corresponding dedicated resource according to the format of the SCI, and then send the SR to the network device on the dedicated resource (such as resource 1). The network device can determine the sidelink transmission resource corresponding to SCI format 1 for the first terminal device to transmit the SCI.

[0236] Optionally, the first terminal device can indicate the format corresponding to the second stage SCI through the indication information in the first stage SCI, so that the second terminal device can know the size of the sidelink transmission resource indicated by the assistance information sent by the first terminal device according to the indication information. For example, the SCI is a two-stage SCI, the two-stage SCI includes a first stage SCI and a second stage SCI, and the indication information in the first stage SCI indicates the size of the assistance information carried by the second stage SCI. That is, the assistance information can be jointly indicated by the two-stage SCI, the first stage SCI indicates the second stage SCI, and the second stage SCI carries the assistance information. It is easy to understand that the indication information of the first stage SCI is only an example, and information that can indicate the associated information of the assistance information carried by the second stage SCI can be carried in the indication information of the first stage SCI, and part or all of the associated information can be carried. For example, the associated information can be information associated with the size of the assistance information, information associated with the resource indicated in the assistance information, and the like.

[0237] Optionally, the SCI is a two-stage SCI, the two-stage SCI includes a first stage SCI and a second stage SCI, and the assistance information can also be carried in the first stage SCI, and the embodiments of the present application are not limited. Similarly, the first stage SCI can also carry the associated information of the assistance information.

[0238] As a second implementation method, a SCI format can be predefined, which can correspond to multiple SCI sizes, and different sizes of SCI carry different sizes of sidelink transmission resources indicated by the assistance information. For example, the first SCI size corresponds to transmitting 1 set of sidelink transmission resources, the second SCI size corresponds to transmitting 2 sets of sidelink transmission resources, and so on. Moreover, different sizes of SCI correspond to different dedicated resources, for example, the first SCI size corresponds to the dedicated SR configuration: SR ID 1, resource 1, and the second SCI size corresponds to the dedicated SR configuration: SR ID 2, resource 2. For example, the first terminal device can determine the size of the corresponding SCI according to the size of the assistance information to be transmitted, and then determine the corresponding dedicated resource according to the size of the SCI, and then send the SR to the network device on the dedicated resource (such as resource 1), and the network device can determine to allocate the first terminal device the sidelink transmission resources corresponding to the first SCI size for transmitting the SCI.

[0239] As a third implementation method, truncated SCI is introduced. It can be understood that when the size of the sidelink transmission resource requested by the dedicated SR is smaller than the size of the sidelink transmission resource required by the assistance information to be transmitted, as much assistance information as possible can be transmitted by the truncated SCI. The format of the normal SCI is different from that of the truncated SCI. For example, a normal SCI can transmit 100 megabytes of assistance information, but the size of the sidelink transmission resource requested by the first terminal device through the dedicated SR cannot transmit 100 megabytes of assistance information, and the first terminal device determines to use the truncated SCI to transmit a part of the assistance information, such as 50 megabytes of assistance information, so that the first terminal device generates the truncated SCI, which carries 50 megabytes of assistance information. Optionally, the indication information in the first stage SCI can indicate whether the second stage SCI corresponds to the normal SCI (normal SCI) or the truncated SCI (truncated SCI). Thus, the second terminal device can know from the indication information whether the assistance information transmitted by the first terminal device indicates the entire sidelink transmission resource or part of the sidelink transmission resource.

[0240] It should be noted that in the implementation scheme given above, a dedicated resource and a dedicated scheduling request are used to request the network device to allocate sidelink transmission resources for sending SCI. As another implementation method, a scheduling request for requesting allocation of sidelink transmission resources for sending the SCI can also be sent to the network device on a non-dedicated resource (which can be a common resource), and then the first sidelink transmission resource is received from the network device. Optionally, the first terminal device can determine the non-dedicated resource according to the SCI format; wherein the non-dedicated resources corresponding to different formats of SCI are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different formats of SCI are different. Optionally, the first terminal device can determine the non-dedicated resource according to the size of the SCI; wherein the non-dedicated resources corresponding to different sizes of SCI are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried by different sizes of SCI are different.

[0241] Therefore, the first terminal device can send a scheduling request to the network device on a resource (such as a dedicated resource or a non-dedicated resource), and the scheduling request is used to request allocation of sidelink transmission resources for sending SCI. Then, the first terminal device receives the first sidelink transmission resource from the network device.

[0242] Reference Figure 8 The wireless communication method provided by the embodiments of the present application is shown in the figure. The method is a second implementation method for the first terminal device to obtain the first sidelink transmission resource for sending auxiliary information.

[0243] The method includes the following steps:

[0244] Step 801, the first terminal device sends a buffer status report (BSR) to the network device, the buffer status report is used to request allocation of sidelink transmission resources for sending sidelink control information, and the buffer status report indicates the size of the auxiliary information to be transmitted.

[0245] Step 802, the first terminal device receives the first sidelink transmission resource from the network device.

[0246] Based on the above scheme, the first terminal device obtains the sidelink transmission resource for sending auxiliary information based on the reporting of the BSR.

[0247] The BSR can also be referred to as a BL BSR.

[0248] The format of the SL BSR can refer to Figure 3When the first terminal device sends the SL BSR to the network device to request the network device to obtain the sidelink transmission resource for transmitting the assistance information, the size of the Buffer size in the SL BSR can be the size of the assistance information to be transmitted. For example, the size of the buffer size is the size of the SCI to be transmitted carrying the assistance information.

[0249] As an example, three implementation methods are given below.

[0250] As a first implementation method, the existing SL BSR format can be used, i.e., the format shown in Figure 3 When the target index in the SL BSR is a dedicated target index, the dedicated target index is used to request the allocation of the sidelink transmission resource for transmitting the assistance information, and thus the SL BSR is used to request the sidelink transmission resource corresponding to the assistance information. It can be understood that the network device configures the corresponding sidelink transmission resource according to the size of the buffer size corresponding to the dedicated target index. That is, the dedicated target index corresponds to the size of the assistance information to be transmitted.

[0251] As a second implementation method, the existing SL BSR format can be used, i.e., the format shown in Figure 3 When the logical channel group identifier in the SL BSR is a dedicated logical channel group identifier, the dedicated logical channel group identifier is used to request the allocation of the sidelink transmission resource for transmitting the assistance information, and thus the SL BSR is used to request the sidelink transmission resource corresponding to the assistance information. It can be understood that the network device configures the corresponding sidelink transmission resource according to the size of the buffer size corresponding to the dedicated logical channel group identifier. That is, the dedicated logical channel group identifier corresponds to the size of the assistance information to be transmitted.

[0252] As a third implementation method, the existing SL BSR format can not be used, but a dedicated buffer status report is used, which corresponds to a dedicated BSR format, and the dedicated buffer status report is used to request the sidelink transmission resource corresponding to the assistance information. It can be understood that the network device configures the corresponding sidelink transmission resource according to the size of the buffer size corresponding to the dedicated BSR format. The dedicated buffer status report can be understood as a buffer status report used only to request the configuration of the sidelink transmission resource.

[0253] It can be understood that the dedicated BSR format and the existing SL BSR format can be different MAC CEs. For example, a MAC CE specially designed to support the dedicated BSR format can be different from the MAC CE corresponding to the existing SL BSR format. The "dedicated" can be embodied as: each MAC CE has its own LCID to identify itself. Here, the dedicated BSR format corresponds to a MAC CE with a dedicated LCID.

[0254] Optionally, the MAC layer of the first terminal device determines the assistance information and the corresponding sidelink transmission resource, and instructs the physical layer (PHY layer) to send.

[0255] It can be understood that this embodiment is described by taking the SCI as the carrier of the assistance information, and the scheme of this embodiment can also be applicable when the SL MAC CE carries the assistance information.

[0256] Based on the above scheme, the first terminal device can obtain the sidelink transmission resource for sending the assistance information, ensuring that the assistance information can be normally sent out, so that the second terminal device can better perform SL communication based on the assistance information to improve the communication quality.

[0257] It should be noted that in the implementation scheme given above, the dedicated target index, the dedicated logical channel group identifier, or the dedicated buffer status report is used to request the network device to allocate the sidelink transmission resource for sending the SCI. As another implementation method, the non-dedicated buffer status report (for example, a common buffer status report) can also be used to request the network device to allocate the sidelink transmission resource for sending the SCI. The non-dedicated buffer status report can carry a non-dedicated target index (for example, a common target index), which can be used to request allocation of the sidelink transmission resource for sending the assistance information, or the non-dedicated buffer status report can carry a non-dedicated logical channel group identifier (for example, a common logical channel group identifier), which can be used to request allocation of the sidelink transmission resource for sending the assistance information.

[0258] Therefore, the first terminal device can send a buffer status report (such as a dedicated buffer status report or a non-dedicated buffer status report) to the network device, and the buffer status report is used to request allocation of the sidelink transmission resource for sending the SCI. Then, the first terminal device receives the first sidelink transmission resource from the network device.

[0259] Embodiment three

[0260] This embodiment is used to solve the above-mentioned problem 3, how the second terminal device uses the sidelink transmission resource set or multiple sets indicated by the assistance information for data transmission.

[0261] To solve this problem, in the embodiments of the present application, when the second terminal device receives the assistance information from the first terminal device, the assistance information is used to indicate one or more sidelink transmission resource sets, the second terminal device processes the assistance information according to the mode information of the second terminal device, wherein the mode information of the second terminal device is used to indicate the resource scheduling mode of the second terminal device. Specifically, the mode information of the second terminal device includes mode 1, or mode 2, or mode 1+mode 2.

[0262] Next, according to the different mode information of the second terminal device, three different implementation methods of the second terminal device processing the assistance information according to the mode information of the second terminal device are given.

[0263] Method one, the mode information of the second terminal device is used to indicate that the second terminal device is in mode 1, or in mode 1+mode 2, when the second terminal device receives the assistance information, the second terminal device can report the assistance information to the network device, and then the network device can allocate the first sidelink transmission resource for the second terminal device based on the assistance information.

[0264] Optionally, the second terminal device can report the assistance information to the network device based on the sidelink user information (Sidelink UE information, SUI) message, user assistance information (UE Assistant information, UAI) message, etc.

[0265] Optionally, when the second terminal device reports the assistance information, it can also report the destination L2 ID associated with the assistance information at the same time. It can be understood that the destination L2 ID here is also the source L2 ID of the first terminal device sending the assistance information.

[0266] Method two, the mode information of the second terminal device is used to indicate that the second terminal device is in mode 1, or in mode 1+mode 2, the second terminal device can discard or ignore the assistance information.

[0267] Exemplarily, the second terminal device can judge whether it needs to discard or ignore the assistance information at the MAC layer or the RRC layer.

[0268] Optionally, the second terminal device only discards or ignores the preferred sidelink transmission resource that is not used in the one or more sidelink transmission resource sets indicated by the assistance information.

[0269] Optionally, after the second terminal device discards or ignores the assistance information, the second terminal device feeds back indication information to the first terminal device, the indication information being used to indicate that the second terminal device no longer needs the assistance information, so as to avoid the first terminal device subsequently sending unnecessary assistance information to the second terminal device. Exemplarily, the indication information can be carried on a PC5-RRC signaling, a SL MAC CE or a physical sidelink feedback channel (PSFCH) channel.

[0270] Method three, the mode information of the second terminal device is used to indicate that the second terminal device is in mode 2, when the second terminal device receives the assistance information, the second terminal device can allocate or determine the first sidelink transmission resource for the second terminal device based on the assistance information.

[0271] Based on the above various schemes, after the second terminal device receives the assistance information, the second terminal device can obtain more reasonable sidelink transmission resources based on the assistance information or select a suitable destination for communication based on the sidelink transmission resources, which helps to improve the resource utilization and ensure the SL communication quality.

[0272] As an implementation method, regardless of whether the second terminal device is in mode 1, mode 2, or mode 1+mode 2, after the second terminal device receives the assistance information from the first terminal device, if the set or sets of sidelink transmission resources indicated by the assistance information include preferred sidelink transmission resources, and the first sidelink transmission resource determined by the second terminal device or the network device for transmitting sidelink data of the second terminal device includes part or all of the preferred sidelink transmission resources, that is, the first sidelink transmission resource corresponds to the preferred sidelink transmission resources, the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device. For example, the assistance information sent by the first terminal device to the second terminal device indicates the preferred sidelink transmission resources, and the preferred sidelink transmission resources include resource 1, resource 2, and resource 3. The first sidelink transmission resource determined by the second terminal device or the network device for transmitting sidelink data of the second terminal device includes resource 1, resource 4, and resource 5. As one way, the resource 1, resource 4, and resource 5 are preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, or as another way, the resource 1 is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, and the resource 4 and resource 5 can be preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, or can not be preferentially used or only used for the second terminal device to send sidelink data to the first terminal device. Based on this implementation method, when the first sidelink transmission resource corresponds to the preferred sidelink transmission resources, the destination corresponding to the first terminal device is preferentially selected or only selected when selecting the destination based on SL LCP.

[0273] It should be noted that the "preferential selection" here can be understood as: when there is a destination corresponding to the first terminal device, the destination corresponding to the first terminal device is preferentially selected, and when there is no destination corresponding to the first terminal device, other destinations corresponding to other terminal devices are selected according to the prior art. The "only selection" here can be understood as: when there is a destination corresponding to the first terminal device, the destination corresponding to the first terminal device is selected, and when there is no destination corresponding to the first terminal device, other destinations corresponding to other terminal devices are not selected, that is, no sidelink transmission resources are allocated to other terminal devices.

[0274] It should be noted that the aforementioned preferred sidelink transmission resources can also be understood as the preferred resource set for the UE's transmission when the second terminal device transmits.

[0275] As one implementation method, regardless of whether the second terminal device is in mode 1, mode 2, or mode 1+mode 2, after the second terminal device receives auxiliary information from the first terminal device, if the set or more sets of sidelink transmission resources indicated by the auxiliary information include sidelink transmission resources that are preferably not used, and the first sidelink transmission resource determined by the second terminal device or the network device for transmitting the sidelink data of the second terminal device includes some or all of the resources in the preferred unused sidelink transmission resources, that is, the first sidelink transmission resource corresponds to the preferred unused sidelink transmission resource, then the first sidelink transmission resource is not used by the second terminal device to send sidelink data to the first terminal device. For example, the auxiliary information sent by the first terminal device to the second terminal device indicates sidelink transmission resources that are preferably not used, and the preferred unused sidelink transmission resources include resources 4 and 5. The first sidelink transmission resources determined by the second terminal device or network device for transmitting sidelink data of the second terminal device include resources 1, 4, and 5. In one approach, resources 1, 4, and 5 are not used for the second terminal device to send sidelink data to the first terminal device; or in another approach, resources 4 and 5 are not used for the second terminal device to send sidelink data to the first terminal device. Resource 1 may or may not be used for the second terminal device to send sidelink data to the first terminal device. Based on this implementation method, when the first sidelink transmission resource corresponds to a preferred unused sidelink transmission resource, the destination corresponding to the first terminal device is not selected when selecting a destination based on SL LCP.

[0276] It should be noted that the aforementioned preferred unused sidelink transmission resources can also be understood as a set of resources that are preferred not to be used by the UE's transmission when the second terminal device transmits.

[0277] refer to Figure 9 This is a schematic diagram of a communication device provided in an embodiment of this application. The device is used to implement the various steps performed by the corresponding first or second terminal device in the above embodiments, such as... Figure 9 As shown, the device 900 includes a transceiver unit 910 and a processing unit 920.

[0278] In a first embodiment, the communication apparatus is a first terminal device or a chip for a first terminal device, and the method comprises:

[0279] obtaining mode information of a second terminal device, the mode information being used to indicate a resource scheduling mode of the second terminal device;

[0280] sending, by the transceiver 910, assistance information to the second terminal device according to the mode information, the assistance information being used to indicate one or more sets of sidelink transmission resources.

[0281] As a possible implementation method, the processing unit 920 is configured to obtain the mode information of the second terminal device, and specifically includes:

[0282] receiving, by the transceiver 910, the mode information from the second terminal device.

[0283] As a possible implementation method, the transceiver 910 is further configured to send a first request to the second terminal device, the first request being used to request to obtain the mode information.

[0284] As a possible implementation method, the processing unit 920 is configured to send, by the transceiver 910, the assistance information to the second terminal device according to the mode information, and specifically includes:

[0285] when it is determined that the mode information indicates that the second terminal device is in a network device scheduling mode and an autonomous competition mode, sending, by the transceiver 910, the assistance information to the second terminal device; or,

[0286] when it is determined that the mode information indicates that the second terminal device is in an autonomous competition mode, sending, by the transceiver 910, the assistance information to the second terminal device.

[0287] As a possible implementation method, the processing unit 920 is further configured to obtain a first sidelink transmission resource used to send the assistance information;

[0288] The processing unit 920 is configured to send, by the transceiver 910, the assistance information to the second terminal device according to the mode information, and specifically includes:

[0289] sending, by the transceiver 910, first information to the second terminal device on the first sidelink transmission resource according to the mode information, the first information carrying the assistance information.

[0290] As a possible implementation method, the processing unit 920 is configured to obtain a first sidelink transmission resource for transmitting the assistance information, and specifically includes:

[0291] obtain a dedicated scheduling request for requesting allocation of a sidelink transmission resource for transmitting the first information; and transmit the dedicated scheduling request to the network device on a dedicated resource through the transceiver unit 910; and receive the first sidelink transmission resource from the network device through the transceiver unit 910.

[0292] As a possible implementation method, the processing unit 920 is further configured to determine the dedicated resource according to the format of the first information; wherein the dedicated resources corresponding to different formats of the first information are different, and the sizes of the sidelink transmission resources indicated by the assistance information carried by different formats of the first information are different.

[0293] As a possible implementation method, the processing unit 920 is further configured to determine the dedicated resource according to the size of the first information; wherein the dedicated resources corresponding to different sizes of the first information are different, and the sizes of the sidelink transmission resources indicated by the assistance information carried by different sizes of the first information are different.

[0294] As a possible implementation method, the processing unit 920 is further configured to determine the size of the first sidelink transmission resource, and if the size of the first sidelink transmission resource is smaller than the size of the sidelink transmission resource required by the assistance information to be transmitted, generate truncated first information, and the assistance information carried by the first information is less than the assistance information to be transmitted.

[0295] As a possible implementation method, the processing unit 920 is configured to obtain a first sidelink transmission resource for transmitting the assistance information, and specifically includes:

[0296] obtain a buffer status report for requesting allocation of a sidelink transmission resource for transmitting the first information, the buffer status report indicating the size of the assistance information to be transmitted; and transmit the buffer status report to the network device through the transceiver unit 910; and receive the first sidelink transmission resource from the network device through the transceiver unit 910.

[0297] As a possible implementation method, the buffer status report carries a dedicated target index for requesting allocation of a sidelink transmission resource for transmitting the assistance information, and the dedicated target index corresponds to the size of the assistance information to be transmitted.

[0298] As a possible implementation method, the buffer status report carries a dedicated logical channel group identifier, the dedicated logical channel group identifier is used to request allocation of a sidelink transmission resource for sending the assistance information, and the dedicated logical channel group identifier corresponds to a size of the assistance information to be transmitted.

[0299] As a possible implementation method, the buffer status report is a dedicated buffer status report.

[0300] As a possible implementation method, the first information includes any one of the following:

[0301] Sidelink control information SCI, PC5-radio resource control RRC signaling, sidelink medium access control control element SL MAC CE.

[0302] As a possible implementation method, the first information is two-level SCI, the two-level SCI includes a first-level SCI and a second-level SCI, and the indication information in the first-level SCI indicates a size of the assistance information carried by the second-level SCI.

[0303] As a possible implementation method, the first information is two-level SCI, the two-level SCI includes a first-level SCI and a second-level SCI, and the assistance information is carried in the first-level SCI.

[0304] As a possible implementation method, the processing unit 920 is further configured to determine that a preset policy condition is met before sending the assistance information to the second terminal device through the transceiver unit 910 according to the mode information.

[0305] The preset policy condition includes one or more parameters of a channel busy ratio CBR, a reference signal received power RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a signal to interference plus noise ratio SINR, or a power value reaching a preset threshold or range.

[0306] In a second embodiment, the communication apparatus is a second terminal device or a chip for a second terminal device, and then:

[0307] The transceiver unit 910 is configured to receive assistance information from a first terminal device, the assistance information being used to indicate one or more sets of sidelink transmission resources.

[0308] The processing unit 920 is configured to process the assistance information according to mode information of a second terminal device, the mode information being used to indicate a resource scheduling mode of the second terminal device.

[0309] As a possible implementation method, the processing unit 920 is configured to process the assistance information according to mode information of the second terminal device, and specifically includes:

[0310] The mode information is used to indicate that the second terminal device is in an autonomous competition mode, and the first sidelink transmission resource for transmitting sidelink data of the second terminal device is determined according to the assistance information.

[0311] As a possible implementation method, the processing unit 920 is configured to process the assistance information according to mode information of the second terminal device, and specifically includes:

[0312] The mode information is used to indicate that the second terminal device is in an autonomous competition mode and a network device scheduling mode, or in a network device scheduling mode, and the assistance information is sent to a network device through the transceiver unit 910, and the assistance information is used for generation of a first sidelink transmission resource, and the first sidelink transmission resource is used for transmitting sidelink data of the second terminal device.

[0313] As a possible implementation method, the assistance information indicates that one or more sets of sidelink transmission resources include preferred sidelink transmission resources, the first sidelink transmission resource corresponds to the preferred sidelink transmission resource, and the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device.

[0314] As a possible implementation method, the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, including:

[0315] The target terminal device selected based on a sidelink logical channel priority mechanism includes the first terminal device.

[0316] As a possible implementation method, the assistance information indicates that one or more sets of sidelink transmission resources include preferred sidelink transmission resources, the first sidelink transmission resource corresponds to the preferred sidelink transmission resource, and the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device.

[0317] As a possible implementation method, the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device, including:

[0318] The target terminal device selected based on a sidelink logical channel priority mechanism does not include the first terminal device.

[0319] As a possible implementation method, the processing unit 920 is configured to process the assistance information according to mode information of the second terminal device, and specifically includes:

[0320] The mode information is used to indicate that the second terminal device is in an autonomous competition mode and a network device scheduling mode, or is in the network device scheduling mode, and is used to discard or ignore the assistance information.

[0321] As a possible implementation method, the transceiver unit 910 is further configured to send the mode information to the first terminal device.

[0322] As a possible implementation method, the transceiver unit 910 is further configured to receive a first request from the first terminal device, and the first request is used to request to obtain the mode information.

[0323] As a possible implementation method, the transceiver unit 910 is further configured to send a second request to the first terminal device, and the second request is used to request to obtain assistance information.

[0324] As a possible implementation method, the processing unit 920 is further configured to determine that a preset policy condition is met.

[0325] The preset policy condition includes that one or more parameters of a channel busy ratio (CBR), a reference signal received power (RSRP), a reference signal received quality (RSRQ), a received signal strength indication (RSSI), a signal to interference plus noise ratio (SINR), or a power value of the second terminal device reaches a preset threshold or range.

[0326] In a third embodiment, the communication apparatus is a first terminal device or a chip for a first terminal device, and then:

[0327] The transceiver unit 910 is configured to send a dedicated scheduling request to a network device on a dedicated resource, the dedicated scheduling request is used to request to allocate a sidelink transmission resource for sending sidelink control information; receive a first sidelink transmission resource from the network device; and send sidelink control information to a second terminal device on the first sidelink transmission resource, the sidelink control information carries assistance information, and the assistance information is used to indicate one or more sets of sidelink transmission resources.

[0328] As a possible implementation method, the processing unit 920 is configured to determine the dedicated resource according to a format of the sidelink control information; wherein different formats of the sidelink control information correspond to different dedicated resources, and different formats of the sidelink control information carry assistance information indicating different sizes of the sidelink transmission resources.

[0329] As a possible implementation method, the processing unit 920 is configured to determine the dedicated resource according to the size of the sidelink control information; wherein the dedicated resources corresponding to sidelink control information of different sizes are different, and the sizes of the sidelink transmission resources indicated by the auxiliary information carried in the sidelink control information of different sizes are different.

[0330] As a possible implementation method, the processing unit 920 is configured to determine that the size of the first sidelink transmission resource is smaller than the size of the sidelink transmission resource required by the auxiliary information to be transmitted, and generate truncated sidelink control information, wherein the auxiliary information carried in the truncated sidelink control information is less than the auxiliary information to be transmitted.

[0331] As a possible implementation method, the transceiver 910 is further configured to receive mode information from the second terminal device, wherein the mode information is used to indicate that the second terminal device is in an autonomous competition mode, or is in a self-competition mode and a network device scheduling mode.

[0332] As a possible implementation method, the transceiver 910 is further configured to send a first request to the second terminal device, wherein the first request is used to request to obtain the mode information.

[0333] As a possible implementation method, the transceiver 910 is further configured to receive a second request from the second terminal device, wherein the second request is used to request to obtain auxiliary information.

[0334] As a possible implementation method, the processing unit 920 is configured to determine that a preset policy condition is met; wherein the preset policy condition includes that one or more parameters of CBR, RSRP, RSRQ, RSSI, SINR or power of the first terminal device reach a preset threshold or range.

[0335] In a fourth embodiment, the communication apparatus is a first terminal device or a chip for a first terminal device, and then:

[0336] The transceiver 910 is configured to send a buffer status report to a network device, wherein the buffer status report is used to request to allocate a sidelink transmission resource for sending sidelink control information, and the buffer status report indicates the size of the auxiliary information to be transmitted; receive a first sidelink transmission resource from the network device; and send sidelink control information to a second terminal device on the first sidelink transmission resource, wherein the sidelink control information carries auxiliary information, and the auxiliary information is used to indicate one or more sets of sidelink transmission resources.

[0337] As a possible implementation method, the buffer status report carries a dedicated target index used for requesting allocation of a sidelink transmission resource for sending the assistance information, the dedicated target index corresponding to a size of the assistance information to be transmitted.

[0338] As a possible implementation method, the buffer status report carries a dedicated logical channel group identifier used for requesting allocation of a sidelink transmission resource for sending the assistance information, the dedicated logical channel group identifier corresponding to a size of the assistance information to be transmitted.

[0339] As a possible implementation method, the buffer status report is a dedicated buffer status report.

[0340] As a possible implementation method, the transceiver 910 is further configured to receive mode information from the second terminal device, the mode information indicating that the second terminal device is in an autonomous contention mode, or in a self-contention mode and a network device scheduling mode.

[0341] As a possible implementation method, the transceiver 910 is further configured to send a first request to the second terminal device, the first request being used for requesting acquisition of the mode information.

[0342] As a possible implementation method, the transceiver 910 is further configured to receive a second request from the second terminal device, the second request being used for requesting acquisition of the assistance information.

[0343] As a possible implementation method, the processing unit 920 is configured to determine that a preset policy condition is met, wherein the preset policy condition includes that a value of one or more parameters of CBR, RSRP, RSRQ, RSSI, SINR or power of the first terminal device reaches a preset threshold or range.

[0344] Optionally, the communication apparatus 900 can further include a storage unit configured to store data or instructions (also referred to as code or program), and each of the above units can interact with or be coupled to the storage unit to implement corresponding methods or functions. For example, the processing unit 920 can read data or instructions in the storage unit, so that the communication apparatus implements the methods in the above embodiments.

[0345] It should be understood that the division of units in the above apparatus is only a logical functional division, and in actual implementation, all or part of the units can be integrated into one physical entity, or can be physically separated. The units in the apparatus can all be implemented in the form of software invoked by a processing element; or all be implemented in the form of hardware; or part of the units are implemented in the form of software invoked by a processing element, and part of the units are implemented in the form of hardware. For example, each unit can be a separately established processing element, or can be integrated into a chip of the apparatus, in addition, the unit can also be stored in the form of a program in a memory, and the function of the unit is invoked and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together, or can be independently implemented. The processing element described herein can be a processor, which can be an integrated circuit with a signal processing capability. In the implementation process, each step of the above method or each unit can be implemented by an integrated logic circuit of hardware in the processing element, or in the form of software invoked by the processing element.

[0346] In one example, the units in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, for example, one or more application specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when the units in the apparatus can be implemented in the form of a program invoked by a processing element, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can invoke a program. For another example, the units can be integrated together to implement a system-on-a-chip (SOC).

[0347] The above transceiver unit 910 is an interface circuit of the apparatus for receiving signals from other apparatuses or transmitting signals to other apparatuses. For example, when the apparatus is implemented in the form of a chip, the transceiver unit 910 is an interface circuit of the chip for receiving signals from other chips or apparatuses or transmitting signals to other chips or apparatuses.

[0348] Reference Figure 10 A communication apparatus provided by an embodiment of the present application is shown in a schematic diagram. The apparatus is used to implement the operations of the first terminal device or the second terminal device in the above embodiments. As shown in Figure 10As shown, the communication apparatus includes a processor 1010 and an interface 1030. Optionally, the communication apparatus further includes a memory 1020. The interface 1030 is configured to enable communication between the communication apparatus and other devices.

[0349] The method performed by the first terminal device or the second terminal device in the above embodiments can be implemented by the processor 1010 invoking a program stored in the memory (which can be the memory 1020 in the first terminal device or the second terminal device, or an external memory). That is, the first terminal device or the second terminal device can include a processor 1010 which invokes a program in the memory to perform the method performed by the first terminal device or the second terminal device in the above method embodiments. The processor here can be an integrated circuit with a processing capability of a signal, such as a CPU. The first terminal device or the second terminal device can be implemented by one or more integrated circuits configured to implement the above method. For example: one or more ASICs, or one or more microprocessors DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Alternatively, the above implementation manners can be combined.

[0350] Specifically, Figure 9 The functions / implementation processes of the transceiver unit 910 and the processing unit 920 in the communication apparatus 1000 can be implemented by the processor 1010 in the communication apparatus 1000 invoking the computer executable instructions stored in the memory 1020. Figure 10 The functions / implementation processes of the processing unit 920 in the communication apparatus 1000 can be implemented by the processor 1010 in the communication apparatus 1000 invoking the computer executable instructions stored in the memory 1020. Figure 9 The functions / implementation processes of the processing unit 920 in the communication apparatus 1000 can be implemented by the processor 1010 in the communication apparatus 1000 invoking the computer executable instructions stored in the memory 1020. Figure 10 The functions / implementation processes of the transceiver unit 910 in the communication apparatus 1000 can be implemented by the interface 1030 in the communication apparatus 1000. Figure 9 The functions / implementation processes of the transceiver unit 910 in the communication apparatus 1000 can be implemented by the interface 1030 in the communication apparatus 1000. Figure 10 The functions / implementation processes of the transceiver unit 910 in the communication apparatus 1000 can be implemented by the interface 1030 in the communication apparatus 1000.

[0351] It should be understood by those of ordinary skill in the art that various numbers such as first, second, etc. involved in the present application are only for the convenience of description and do not limit the scope of the embodiments of the present application, nor represent the order of precedence. The association relationship of the associated objects is described as "and / or", which means that there can be three kinds of relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one" means one or more. At least two means two or more. "At least one", "any one" or similar expressions mean any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c (one, kind) can represent a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple. "Multiple" means two or more, and other quantifiers are similar.

[0352] It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0353] The present application also provides a computer readable medium having a computer program stored thereon, which, when executed by a computer, realizes the functions of any of the above-mentioned method embodiments.

[0354] The present application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the above-mentioned method embodiments.

[0355] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-mentioned system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0356] In the embodiments described above, all or some of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or some of the embodiments can be implemented in the form of a computer program product storing computer program instructions. The computer program instructions are executed in a computer to implement all or some of the processes or functions described in the embodiments of the present application. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatuses. The computer program instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)), etc.

[0357] The various illustrative logical blocks, modules, circuits, and algorithms described in connection with the embodiments disclosed herein can be implemented or performed by a general purpose processor, a digital signal processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor can be a microprocessor, optionally the general purpose processor can also be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

[0358] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in Random Access Memory (RAM), flash memory, Read-Only Memory (ROM), EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC.

[0359] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the operations specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the operations specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the operations specified in the flowchart block or blocks.

[0360] In one or more exemplary designs, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions can 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. Storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or data

[0361] Those skilled in the art will appreciate that the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions can 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. Storage media can be any available media that can be accessed by a general purpose or special purpose computer.

[0362] The above detailed description of the specific implementation, for the purpose of the application, technical solutions and beneficial effects have been further detailed, should be understood that the above described only for the specific implementation of the present application has, and is not used to limit the scope of protection of the present application, any modification, equivalent replacement, improvement, etc. on the basis of the technical solutions of the present application, should be included in the scope of protection of the present application. The above description of the present application specification can make the technical any can utilize or implement the content of the present application, any modification based on the disclosed content should be considered as obvious in the art, the basic principles described in the present application can be applied to other variations without departing from the essence and scope of the present application. Therefore, the content disclosed in the present application is not only limited to the described embodiments and designs, but also can be extended to the maximum range consistent with the principles of the present application and the disclosed new features.

[0363] Although the present application is described in connection with specific features and embodiments thereof, it is to be understood that it is not limited to the described embodiments and that various modifications and combinations can occur to those skilled in the art without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded in an illustrative rather than a restrictive sense, and all such modifications of equivalents and alternatives are intended to be included within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the scope of the present application. Thus, if these modifications and changes of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and changes.

Claims

1. A wireless communication method for a first terminal device, characterized in that, include: Obtain mode information of the second terminal device, wherein the mode information is used to indicate that the resource scheduling mode of the second terminal device includes at least an autonomous competition mode; Based on the mode information, auxiliary information is sent to the second terminal device, the auxiliary information being used to indicate one or more sets of sidelink transmission resources.

2. The method as described in claim 1, characterized in that, The acquisition of the mode information of the second terminal device includes: Receive the mode information from the second terminal device.

3. The method as described in claim 2, characterized in that, Also includes: A first request is sent to the second terminal device, the first request being used to request the acquisition of the mode information.

4. The method according to any one of claims 1-3, characterized in that, Sending auxiliary information to the second terminal device according to the mode information includes: The mode information indicates that the second terminal device is in network device scheduling mode and autonomous competition mode, and the auxiliary information is sent to the second terminal device; or... The auxiliary information is sent to the second terminal device after the mode information indicates that the second terminal device is in autonomous competition mode.

5. The method as described in any one of claims 1-3, characterized in that, Also includes: Acquire first-side cross-link transmission resources for sending the auxiliary information; Sending auxiliary information to the second terminal device according to the mode information includes: Based on the mode information, first information is sent to the second terminal device on the first side link transmission resource, and the first information carries the auxiliary information.

6. The method as described in claim 5, characterized in that, The acquisition of the first-side cross-link transmission resources for sending the auxiliary information includes: Send a dedicated scheduling request to the network device on dedicated resources, the dedicated scheduling request being used to request the allocation of sidelink transmission resources for sending the first information; Receive first-side crosslink transmission resources from the network device.

7. The method as described in claim 4, characterized in that, Also includes: Acquire first-side cross-link transmission resources for sending the auxiliary information; Sending auxiliary information to the second terminal device according to the mode information includes: Based on the mode information, first information is sent to the second terminal device on the first side link transmission resource, and the first information carries the auxiliary information.

8. The method as described in claim 7, characterized in that, The acquisition of the first-side cross-link transmission resources for sending the auxiliary information includes: Send a dedicated scheduling request to the network device on dedicated resources, the dedicated scheduling request being used to request the allocation of sidelink transmission resources for sending the first information; Receive first-side crosslink transmission resources from the network device.

9. The method as described in claim 6 or 8, characterized in that, Also includes: The dedicated resource is determined based on the format of the first information; The dedicated resources corresponding to the first information in different formats are different, and the size of the side link transmission resources indicated by the auxiliary information carried by the first information in different formats is different.

10. The method as described in claim 6 or 8, characterized in that, Also includes: The dedicated resource is determined based on the size of the first information; Among them, the dedicated resources corresponding to the first information of different sizes are different, and the size of the side link transmission resources indicated by the auxiliary information carried by the first information of different sizes are different.

11. The method as described in claim 6 or 8, characterized in that, Also includes: If the size of the first side link transmission resource is determined to be smaller than the size of the side link transmission resource required for the auxiliary information to be transmitted, then the truncated first information is generated.

12. The method as described in claim 5, characterized in that, The acquisition of the first-side cross-link transmission resources for sending the auxiliary information includes: A buffer status report is sent to the network device, the buffer status report being used to request the allocation of sidelink transmission resources for sending the first information, the buffer status report indicating the size of the auxiliary information to be transmitted; Receive first-side crosslink transmission resources from the network device.

13. The method as described in claim 12, characterized in that, The buffer status report carries a dedicated target index, which is used to request the allocation of sidelink transmission resources for sending auxiliary information. The dedicated target index corresponds to the size of the auxiliary information to be transmitted.

14. The method as described in claim 12, characterized in that, The buffer status report carries a dedicated logical channel group identifier, which is used to request the allocation of sidelink transmission resources for sending auxiliary information. The dedicated logical channel group identifier corresponds to the size of the auxiliary information to be transmitted.

15. The method according to any one of claims 12-14, characterized in that, The buffer status report is a dedicated buffer status report.

16. The method as described in claim 5, characterized in that, The first information includes any of the following: Sidelink Control Information (SCI), PC5 Radio Resource Control (RRC) signaling, and Sidelink Media Access Control (SL) MAC CE.

17. The method as described in claim 9, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

18. The method as described in claim 10, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

19. The method as described in claim 11, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

20. The method as described in claim 15, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

21. The method according to any one of claims 6-8 and 12-14, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

22. The method as described in claim 5, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

23. The method as described in claim 9, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

24. The method as described in claim 10, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

25. The method as described in claim 11, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

26. The method as described in claim 15, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

27. The method according to any one of claims 6-8 and 12-14, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

28. The method according to any one of claims 1-3, 6-8, 12-14, 16-20, and 22-26, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as Channel Busy Rate (CBR), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indication (RSSI), Signal-to-Interference-plus-Noise Ratio (SINR), or Power Level, reaches a preset threshold or range.

29. The method as described in claim 4, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

30. The method as described in claim 5, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

31. The method as described in claim 9, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

32. The method as described in claim 10, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

33. The method as described in claim 11, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

34. The method as described in claim 15, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

35. The method as described in claim 21, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

36. The method as described in claim 27, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

37. A wireless communication method for a second terminal device, characterized in that, include: Receive auxiliary information from a first terminal device, the auxiliary information being used to indicate one or more sets of sidelink transmission resources; Based on the mode information of the second terminal device, the auxiliary information is processed, wherein the mode information is used to indicate that the resource scheduling mode of the second terminal device includes at least an autonomous competition mode.

38. The method as described in claim 37, characterized in that, The step of processing the auxiliary information based on the mode information of the second terminal device includes: The mode information is used to indicate that the second terminal device is in an autonomous competition mode. Based on the auxiliary information, a first sidelink transmission resource is determined for transmitting sidelink data of the second terminal device.

39. The method as described in claim 37, characterized in that, The step of processing the auxiliary information based on the mode information of the second terminal device includes: The mode information is used to indicate that the second terminal device is in autonomous competition mode and network device scheduling mode, or in network device scheduling mode, and sends the auxiliary information to the network device. The auxiliary information is used to generate the first side link transmission resource, which is used to transmit the side link data of the second terminal device.

40. The method as described in claim 38 or 39, characterized in that, The auxiliary information indicates one or more sets of sidelink transmission resources, including preferred sidelink transmission resources. The first sidelink transmission resource corresponds to the preferred sidelink transmission resource, and the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device.

41. The method as described in claim 40, characterized in that, The first sidelink transmission resources are preferentially used, or used only, for the second terminal device to send sidelink data to the first terminal device, including: The target terminal device selected based on the side-link logical channel priority mechanism includes the first terminal device.

42. The method as described in claim 38 or 39, characterized in that, The auxiliary information indicates one or more sets of sidelink transmission resources, including preferably unused sidelink transmission resources. The first sidelink transmission resource corresponds to the preferably unused sidelink transmission resource, and the first sidelink transmission resource is not used by the second terminal device to send sidelink data to the first terminal device.

43. The method as described in claim 42, characterized in that, The first sidelink transmission resources are not used for the second terminal device to send sidelink data to the first terminal device, including: The target terminal device selected based on the side-link logical channel priority mechanism does not include the first terminal device.

44. The method as described in claim 37, characterized in that, The step of processing the auxiliary information based on the mode information of the second terminal device includes: The mode information is used to indicate whether the second terminal device is in autonomous competition mode and network device scheduling mode, or if it is in network device scheduling mode, the auxiliary information is discarded or ignored.

45. The method according to any one of claims 37-39, 41, and 43-44, characterized in that, Also includes: The mode information is sent to the first terminal device.

46. ​​The method as described in claim 45, characterized in that, Also includes: A first request is received from the first terminal device, the first request being used to request the acquisition of the mode information.

47. The method as described in claim 40, characterized in that, Also includes: The mode information is sent to the first terminal device.

48. The method as described in claim 42, characterized in that, Also includes: The mode information is sent to the first terminal device.

49. The method as described in claim 47 or 48, characterized in that, Also includes: A first request is received from the first terminal device, the first request being used to request the acquisition of the mode information.

50. The method according to any one of claims 37-39, 41, and 43-44, characterized in that, Also includes: A second request is sent to the first terminal device, the second request being used to request the acquisition of auxiliary information.

51. The method as described in claim 40, characterized in that, Also includes: A second request is sent to the first terminal device, the second request being used to request the acquisition of auxiliary information.

52. The method as described in claim 42, characterized in that, Also includes: A second request is sent to the first terminal device, the second request being used to request the acquisition of auxiliary information.

53. The method as described in any one of claims 44, 46-48, and 51-52, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as Channel Busy Rate (CBR), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indication (RSSI), Signal-to-Interference-plus-Noise Ratio (SINR), or Power Level, reaches a preset threshold or range.

54. The method as described in claim 45, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

55. The method as described in claim 49, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

56. The method as described in claim 50, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

57. A communication device, characterized in that, include: Processing unit and transceiver unit; The processing unit is used to obtain mode information of the second terminal device, and the mode information is used to indicate that the resource scheduling mode of the second terminal device includes at least an autonomous competition mode. The processing unit is configured to send auxiliary information to the second terminal device through the transceiver unit according to the mode information, wherein the auxiliary information is used to indicate one or more sets of sidelink transmission resources.

58. The apparatus as claimed in claim 57, characterized in that, The processing unit is used to obtain the mode information of the second terminal device, specifically including: Used to receive the mode information from the second terminal device through the transceiver unit.

59. The apparatus as claimed in claim 58, characterized in that, The transceiver unit is further configured to send a first request to the second terminal device, the first request being used to request the acquisition of the mode information.

60. The apparatus according to any one of claims 57-59, characterized in that, The processing unit is configured to send auxiliary information to the second terminal device through the transceiver unit according to the mode information, specifically including: When the mode information indicates that the second terminal device is in network device scheduling mode or autonomous competition mode, the auxiliary information is sent to the second terminal device through the transceiver unit; or... When the mode information indicates that the second terminal device is in autonomous competition mode, the auxiliary information is sent to the second terminal device through the transceiver unit.

61. The apparatus according to any one of claims 57-59, characterized in that, The processing unit is further configured to acquire first-side cross-link transmission resources for sending the auxiliary information; The processing unit is configured to send auxiliary information to the second terminal device through the transceiver unit according to the mode information, specifically including: Based on the mode information, the transceiver unit sends first information to the second terminal device on the first side crosslink transmission resource, wherein the first information carries the auxiliary information.

62. The apparatus as claimed in claim 61, characterized in that, The processing unit is configured to acquire first-side cross-link transmission resources for sending the auxiliary information, specifically including: The transceiver unit is used to send a dedicated scheduling request to the network device on dedicated resources, the dedicated scheduling request being used to request the allocation of sidelink transmission resources for sending the first information; and to receive the first sidelink transmission resources from the network device through the transceiver unit.

63. The apparatus as claimed in claim 60, characterized in that, The processing unit is further configured to acquire first-side cross-link transmission resources for sending the auxiliary information; The processing unit is configured to send auxiliary information to the second terminal device through the transceiver unit according to the mode information, specifically including: Based on the mode information, the transceiver unit sends first information to the second terminal device on the first side crosslink transmission resource, wherein the first information carries the auxiliary information.

64. The apparatus as claimed in claim 63, characterized in that, The processing unit is configured to acquire first-side cross-link transmission resources for sending the auxiliary information, specifically including: The transceiver unit is used to send a dedicated scheduling request to the network device on dedicated resources, the dedicated scheduling request being used to request the allocation of sidelink transmission resources for sending the first information; and to receive the first sidelink transmission resources from the network device through the transceiver unit.

65. The apparatus as claimed in claim 62 or 64, characterized in that, The processing unit is further configured to determine the dedicated resource according to the format of the first information; wherein, the dedicated resources corresponding to the first information in different formats are different, and the size of the side link transmission resource indicated by the auxiliary information carried by the first information in different formats is different.

66. The apparatus as claimed in claim 62 or 64, characterized in that, The processing unit is further configured to determine the dedicated resource based on the size of the first information; wherein, the dedicated resources corresponding to different sizes of first information are different, and the sizes of the side link transmission resources indicated by the auxiliary information carried by the first information of different sizes are different.

67. The apparatus as claimed in claim 62 or 64, characterized in that, The processing unit is further configured to determine that the size of the first side link transmission resource is less than the size of the side link transmission resource required for the auxiliary information to be transmitted, and then generate the truncated first information.

68. The apparatus as claimed in claim 61, characterized in that, The processing unit is configured to acquire first-side cross-link transmission resources for sending the auxiliary information, including: The transceiver unit is used to send a buffer status report to the network device, the buffer status report being used to request the allocation of sidelink transmission resources for sending the first information, the buffer status report indicating the size of the auxiliary information to be transmitted; and to receive the first sidelink transmission resources from the network device through the transceiver unit.

69. The apparatus as claimed in claim 68, characterized in that, The buffer status report carries a dedicated target index, which is used to request the allocation of sidelink transmission resources for sending auxiliary information. The dedicated target index corresponds to the size of the auxiliary information to be transmitted.

70. The apparatus as claimed in claim 68, characterized in that, The buffer status report carries a dedicated logical channel group identifier, which is used to request the allocation of sidelink transmission resources for sending auxiliary information. The dedicated logical channel group identifier corresponds to the size of the auxiliary information to be transmitted.

71. The apparatus according to any one of claims 68-70, characterized in that, The buffer status report is a dedicated buffer status report.

72. The apparatus according to any one of claims 68-70, characterized in that, The first information includes any of the following: Sidelink Control Information (SCI), PC5 Radio Resource Control (RRC) signaling, and Sidelink Media Access Control (SL) MAC CE.

73. The apparatus as claimed in claim 65, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

74. The apparatus as claimed in claim 66, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

75. The apparatus as claimed in claim 67, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

76. The apparatus as claimed in claim 71, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

77. The apparatus according to any one of claims 62-64, 68-70, characterized in that, The first information includes any of the following: SCI, PC5-RRC signaling, SL MAC CE.

78. The apparatus as claimed in claim 61, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

79. The apparatus as claimed in claim 65, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

80. The apparatus as claimed in claim 66, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

81. The apparatus as claimed in claim 67, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

82. The apparatus as claimed in claim 71, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

83. The apparatus according to any one of claims 62-64 and 68-70, characterized in that, The first information is a two-level SCI, which includes a first-level SCI and a second-level SCI. The indication information in the first-level SCI indicates the size of the auxiliary information carried by the second-level SCI.

84. The apparatus according to any one of claims 57-59, 62-64, 68-70, 72-76, and 78-82, characterized in that, The processing unit is further configured to determine whether a preset strategy condition is met before sending auxiliary information to the second terminal device through the transceiver unit according to the mode information; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as Channel Busy Rate (CBR), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indication (RSSI), Signal-to-Interference-plus-Noise Ratio (SINR), or Power Level, reaching a preset threshold or range.

85. The apparatus as claimed in claim 60, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

86. The apparatus as claimed in claim 61, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

87. The apparatus as claimed in claim 65, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

88. The apparatus as claimed in claim 66, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

89. The apparatus as claimed in claim 67, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

90. The apparatus as claimed in claim 71, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

91. The apparatus as claimed in claim 77, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

92. The apparatus as claimed in claim 83, characterized in that, Before sending auxiliary information to the second terminal device based on the mode information, the method further includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the first terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

93. A communication device, characterized in that, include: A transceiver unit is used to receive auxiliary information from a first terminal device, the auxiliary information being used to indicate one or more sets of sidelink transmission resources; The processing unit is configured to process the auxiliary information based on the mode information of the second terminal device, wherein the mode information is used to indicate that the resource scheduling mode of the second terminal device includes at least an autonomous competition mode.

94. The apparatus as claimed in claim 93, characterized in that, The processing unit is configured to process the auxiliary information according to the mode information of the second terminal device, specifically including: The mode information is used to indicate that the second terminal device is in an autonomous competition mode, and is used to determine the first sidelink transmission resource for transmitting sidelink data of the second terminal device based on the auxiliary information.

95. The apparatus as claimed in claim 93, characterized in that, The processing unit is configured to process the auxiliary information according to the mode information of the second terminal device, specifically including: The mode information is used to indicate that the second terminal device is in autonomous competition mode and network device scheduling mode, or in network device scheduling mode, and is used to send the auxiliary information to the network device through the transceiver unit. The auxiliary information is used to generate the first side link transmission resource, and the first side link transmission resource is used to transmit the side link data of the second terminal device.

96. The apparatus as claimed in claim 94 or 95, characterized in that, The auxiliary information indicates one or more sets of sidelink transmission resources, including preferred sidelink transmission resources. The first sidelink transmission resource corresponds to the preferred sidelink transmission resource, and the first sidelink transmission resource is preferentially used or only used for the second terminal device to send sidelink data to the first terminal device.

97. The apparatus as claimed in claim 96, characterized in that, The first sidelink transmission resources are preferentially used, or used only, for the second terminal device to send sidelink data to the first terminal device, including: The target terminal device selected based on the side-link logical channel priority mechanism includes the first terminal device.

98. The apparatus as claimed in claim 94 or 95, characterized in that, The auxiliary information indicates one or more sets of sidelink transmission resources, including preferably unused sidelink transmission resources. The first sidelink transmission resource corresponds to the preferably unused sidelink transmission resource, and the first sidelink transmission resource is not used by the second terminal device to send sidelink data to the first terminal device.

99. The apparatus as claimed in claim 98, characterized in that, The first sidelink transmission resources are not used for the second terminal device to send sidelink data to the first terminal device, including: The target terminal device selected based on the side-link logical channel priority mechanism does not include the first terminal device.

100. The apparatus as claimed in claim 93, characterized in that, The processing unit is configured to process the auxiliary information according to the mode information of the second terminal device, specifically including: The mode information is used to indicate whether the second terminal device is in autonomous competition mode and network device scheduling mode, or in network device scheduling mode, and is used to discard or ignore the auxiliary information.

101. The apparatus according to any one of claims 93-95, 97, 99-100, characterized in that, The transceiver unit is also used to send the mode information to the first terminal device.

102. The apparatus as claimed in claim 101, characterized in that, The transceiver unit is further configured to receive a first request from the first terminal device, the first request being used to request the acquisition of the mode information.

103. The apparatus as claimed in claim 96, characterized in that, Also includes: The mode information is sent to the first terminal device.

104. The apparatus as claimed in claim 98, characterized in that, Also includes: The mode information is sent to the first terminal device.

105. The apparatus as claimed in claim 103 or 104, characterized in that, Also includes: A first request is received from the first terminal device, the first request being used to request the acquisition of the mode information.

106. The apparatus according to any one of claims 93-95, 97, 99-100, characterized in that, The transceiver unit is further configured to send a second request to the first terminal device, the second request being used to request the acquisition of auxiliary information.

107. The apparatus as claimed in claim 96, characterized in that, Also includes: A second request is sent to the first terminal device, the second request being used to request the acquisition of auxiliary information.

108. The apparatus as claimed in claim 98, characterized in that, Also includes: A second request is sent to the first terminal device, the second request being used to request the acquisition of auxiliary information.

109. The apparatus according to any one of claims 100, 102-104, and 107-108, characterized in that, The processing unit is also used to determine whether the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as Channel Busy Rate (CBR), Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indication (RSSI), Signal-to-Interference-plus-Noise Ratio (SINR), or Power Level, reaches a preset threshold or range.

110. The apparatus as claimed in claim 101, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

111. The apparatus as claimed in claim 105, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

112. The apparatus as claimed in claim 106, characterized in that, Also includes: Determine if the preset strategy conditions are met; The preset strategy conditions include: the value of one or more parameters of the second terminal device, such as CBR, RSRP, RSRQ, RSSI, SINR, or power level, reaches a preset threshold or range.

113. A communication device, characterized in that, include: A processor, a memory, and the processor are coupled together, the memory being used to store program instructions, and the processor being used to execute the program instructions to implement the method of any one of claims 1-56.

114. A computer program product containing instructions, characterized in that, When it is run on a computer, it implements the method described in any one of claims 1-56 above.

115. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, implement the method as described in any one of claims 1-56.

116. A communication system, characterized in that, It includes a first terminal device for performing the method of any one of claims 1-36, and / or a second terminal device for performing the method of any one of claims 37-56.

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