WO2022022433A1

WO2022022433A1 - Sidelink communication method and apparatus

Info

Publication number: WO2022022433A1
Application number: PCT/CN2021/108319
Authority: WO
Inventors: 黎超
Original assignee: 华为技术有限公司
Priority date: 2020-07-31
Filing date: 2021-07-26
Publication date: 2022-02-03
Also published as: CN114071400A

Abstract

Provided are a sidelink communication method and apparatus, which can be applied to systems such as the Internet of vehicles, V2X and V2V. The method comprises: a first device selecting a sidelink resource by means of random selection or partial sensing, wherein the partial sensing involves the first device selecting a resource according to resource occupation information of some of time units in a sensing window; and then, the first device sending, on the sidelink resource, sidelink control information (SCI) to a second device, wherein the SCI comprises first indication information, with the first indication information being used for indicating that a reservation state of the sidelink resource is non-reserved. A sidelink resource is selected by means of random selection or partial sensing, such that power consumption of a sending-end device is reduced, and a transmission collision caused by insufficient monitoring is prevented, thereby improving the communication efficiency.

Description

A kind of sidelink communication method and device

This application claims the priority of the Chinese patent application filed on July 31, 2020 with the application number 202010763666.8 and the title of the invention is "a sidelink communication method and device", the entire contents of which are by reference Incorporated in this application.

technical field

The present application relates to the field of sidelink communication, and in particular, to a sidelink communication method and apparatus.

Background technique

In the field of wireless communication, a terminal device can communicate with another terminal device through the transfer of a network device, or it can directly communicate with another terminal device without going through the network device. When a terminal device directly communicates with another terminal device without going through the network device , the communication link between the two terminal devices may be called a sidelink (sidelink, SL) or a straight-through link.

During the sidelink communication process, sidelink resources can be reserved for the data to be transmitted (for example, the data to be transmitted is a retransmission service, periodic service, etc.) When a sideline resource is selected by the resource selection method, all detectable sideline resource information in the sensing window can be obtained, and when it is determined that the sideline resource information contains the reservation information of the reserved sideline resource , other terminal equipment transmits data using other sideline resources different from the reserved sideline resources to avoid transmission collision.

However, the above-mentioned fully-aware resource selection method has high complexity and will increase the power consumption of the terminal device. In other resource selection methods that can reduce the power consumption of the terminal, how to solve the transmission collision of reserved sideline resources is an urgent need. solved problem.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a sidelink communication method and device, which can be applied to the Internet of Vehicles, such as vehicle-to-everything (V2X) communication, and long term evolution-vehicle (LTE) technology for vehicle-to-vehicle communication. -V), vehicle-to-vehicle (V2V) communication, etc., or can be used in intelligent driving, intelligent networked vehicles and other fields, select side-travel resources through random selection or partial sensing, saving the power of the sender device consumption, and avoid transmission collision caused by insufficient monitoring, and improve communication efficiency.

A first aspect of the embodiments of the present application provides a sidelink communication method, and the method can be applied to a first device that is a transmitting end device for sidelink communication. The method includes: the first device randomly selects a method or part of The sensing method selects sideline resources, and the partial sensing method is that the first device selects resources according to the resource occupancy information of some time units in the sensing window; then, the first device sends the sideline resources to the second device on the sideline resources. Control information (sidelink control information, SCI), wherein the SCI includes first indication information, and the first indication information is used to indicate that the reservation status of the sidelink resource is unreserved.

Based on the above technical solutions, because the first device does not completely monitor the resource occupancy information of all time units in the sensing window during the process of selecting sideline resources through random selection or partial sensing, that is, the first device does not monitor enough In this case, the first device sends the SCI carrying the first indication information to the second device in the sidelink communication on the sidelink resource, and the first indication information is used to indicate that the reservation status of the sidelink resource is unreserved , so that the second device determines that the sideline resource is an unreserved resource, which can prevent the first device and the second device from preempting the sideline resource, so that the first device selects the sideline resource through a random selection method or a partial sensing method, The power consumption of the first device can be saved, and transmission collision caused by insufficient monitoring of the first device can be avoided, thereby improving communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the selecting, by the first device, the sideline resource in a random selection manner or a partial sensing manner includes: A sideline resource is selected on the pool, wherein the reservation of inter-cycle data packet transmission is activated or enabled on the first resource pool.

Wherein, the first resource pool may be determined by the first device according to the configuration and/or pre-configuration from the network device, and the first resource pool includes a plurality of sideline resources for SL communication. The first resource pool may indicate activation or enablement of the reservation of data packet transmission between cycles in various ways. For example, when the sideline resource is used to transmit the first data packet, the reservation may indicate that the first data packet is in The second data packet is reserved in one cycle, and the reservation can also instruct the retransmission of the first data packet in different cycles to be reserved, and the reservation can also instruct the first data packet to be reserved in other ways of transmission. stay, not limited here.

Based on the above technical solution, after the first device performs the process of randomly selecting or partially sensing the sidelink resource on the resource pool in which periodic reservation is activated or enabled, the first device indicates the reservation of the sidelink resource through the first indication information. The state is unreserved, so that the second device determines that the sideline resource is an unreserved resource, which can prevent the first device and the second device from preempting the sideline resource, so as to reduce interference between UEs doing full sensing resource selection , which improves the performance of the system.

It should be noted that, in the implementation process of the first aspect of the embodiments of the present application, the time unit may specifically indicate a radio frame, subframe, time slot, symbol, or other time unit, etc., which is not specifically limited here.

In a possible implementation manner of the first aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

Based on the above technical solution, the reservation status of the sideline resource indicated by the first indication information carried in the SCI is unreserved or reserved; wherein, when the reservation status is unreserved, it can indicate where the SCI is located The resource after the time unit is not reserved; when the reservation status is reserved, it may indicate the reservation of at least one resource after the time unit where the SCI is located. Various implementation manners of the reservation state are provided, so that the first device can indicate to the second device various reservation states of the sideline resource, which improves the implementability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the reservation of the at least one resource includes the reservation of the first data packet resource and/or the reservation of the second data packet resource. Wherein, the second data packet may be other data packets related to the first data packet, for example, the second data packet may be a retransmission data packet of the first data packet, or the second data packet may also be A service data packet different from the first data packet, or the second data packet may also be other data packets, which is not limited in this application.

Based on the above technical solution, the first indication information in the SCI can be used to indicate that the reservation status of the sideline resource is reserved, that is, to indicate the reservation of at least one resource after the time unit where the SCI is located, wherein the sideline resource is used for for transmitting the first data packet. The first data packet may be used to transmit periodic services, the reservation of the at least one resource may indicate the reservation of the resource of the first data packet in different periods, and/or the at least one resource may also indicate the same period , the reservation of the retransmission data packet of the first data packet, that is, the reservation of the resource of the first data packet. In addition, the at least one resource may also indicate reservation of the second data by the first data packet during different periods, where the second data packet may be a retransmission data packet of the first data packet, or the first data packet may be a retransmission data packet of the first data packet. The second data packet may also be a different service data packet from the first data packet, or, the second data packet may also be another data packet associated with the first data packet, which is not limited in this application. This implementation provides a specific implementation when the first indication information is used to indicate that the reservation status of the sideline resource is to indicate the reservation of at least one resource after the time unit where the SCI is located, which improves the implementability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first indication information is a reserved bit field and/or a resource reservation period field in the SCI.

Based on the above technical solutions, the first indication information can be carried by a designated field in the SCI, that is, the first indication information can be carried by a reserved bit field and/or a resource reservation period field in the SCI, thereby providing the first indication information The specific implementation method in SCI improves the achievability of the scheme.

In a possible implementation manner of the first aspect of the embodiment of the present application, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool.

Optionally, in the SCI, the period value corresponding to the reservation state in the resource reservation period field is 0.

Based on the above technical solution, the first resource pool may be determined by the first device according to the configuration and/or pre-configuration from the network device. The first resource pool includes a plurality of sideline resources for SL communication, the first indication information may be a resource reservation period field, and the period value corresponding to the reservation state in the resource reservation period field does not belong to the first resource The period value or the value of 0 configured in the pool is used to indicate that the reservation status of the sideline resource is unreserved, thereby providing a specific implementation method of the resource reservation period field to improve the implementability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the value corresponding to the reservation status in the SCI is any one or more of the following values: [Nr, Nr+1, , ceil (log2(Nr))-1], where Nr is the number of cycles configured in the first resource pool, which is a positive integer, ceil means rounding up, log2 means taking the logarithm with the base 2, "[" and "]" to indicate multiple values listed.

Based on the above technical solution, the value corresponding to the reserved state in the SCI is any one or more of the following values: [Nr, Nr+1, ..., ceil(log2(Nr))-1], at this time, Indicates that the reservation state of the sideline resource is reserved, thereby providing a specific implementation manner when the reservation state is reserved, and improving the implementability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the reserved state of the sideline resource includes the state value of the time domain resource and/or the state value of the frequency domain resource in the SCI. When the value of the state of the resource and/or the state of the frequency domain resource is 0 or a value other than the preset value, the reservation state of the sideline resource is unreserved.

Optionally, the pre-designed value of the state value of the time domain resource may be: any value from 1 to 496, or any value from 1 to 991. That is, optionally, when the state of the time domain resource is an integer other than 496 or 992, the reservation state of the sideline resource is unreserved. For example, the state of the time domain resource takes a value of 0, or values such as 497, 498, or 993, 994, indicating that the reservation state of the sideline resource is unreserved.

Based on the above technical solutions, the reservation state of the sideline resources can be determined by the state value of the time domain resource and/or the state value of the frequency domain resource in the SCI, thereby providing the reservation state of the sideline resources in the SCI. The specific implementation method improves the achievability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the method further includes:

When the first parameter satisfies the preset condition, the first device determines that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode, wherein the first parameter includes at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

Received Signal Strength Indication RSSI;

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.

Based on the above technical solution, when the first parameter satisfies the preset condition, the first device determines that the resource selection mode in the sidelink is the random selection mode or the partial sensing mode, which is different from the first device only based on the network device's resource selection mode. Compared with a single resource selection mode determined by a single configuration, the first device can more flexibly determine a resource selection mode in the SL according to the first parameter, so as to adapt to different scenarios and further improve communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the method further includes that, according to the first parameter, the first device determines that the reservation status of the sidelink resource is unreserved or reserved.

Optionally, the reservation includes intra-period reservation or inter-period reservation.

Based on the above technical solution, when the first parameter satisfies the preset condition, the first device determines that the resource selection mode in the sidelink is a random selection mode or a partial sensing mode, and the first device can further select the resource according to the first parameter It is determined that the reservation status of the sideline resource is unreserved or reserved, that is, it is determined whether to reserve or periodically reserve the sideline resource. This implementation can determine whether to reserve subsequent resources when sending the SCI according to the value of the first parameter, and can make decisions based on different services or channel conditions, thereby reducing the blindness of whether to reserve or not. , in order to better match the needs of the service and the state of the channel, thereby improving the performance of the system.

The first device acquires second indication information, where the second indication information is used to indicate at least two resource selection manners.

Based on the above technical solution, the first device may acquire second indication information for indicating at least two resource selection modes, and the first device may determine the resource selection mode of the SL among the at least two resource selection modes, and the first device may Compared with a single resource selection mode that can only be determined according to a single configuration of the network device, a more flexible resource selection mode can be provided for the first device.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the first parameter satisfies a preset condition, the first device determines that the resource selection mode of the SL is a random selection mode or a partial sensing mode, including:

When the first parameter satisfies the preset condition, the first device determines that the resource selection mode of the SL is a random selection mode or a partial sensing mode among at least two resource selection modes, wherein the at least two resource selection modes include the following at least Two kinds:

Random selection of resource reservation enable between different transport blocks;

Partial awareness of resource reservation enablement between different transport blocks;

Random selection of resource reservation off between different transport blocks;

Partial awareness of resource reservation off between different transport blocks;

A complete perception mode, in which the first device selects resources according to resource occupation information of all time units that can be detected in the perception window.

Based on the above technical solution, when the first parameter satisfies the preset condition, the first device can determine the resource selection mode of the SL in the process of determining the resource selection mode of the SL in the at least two resource selection modes. Compared with a single resource selection method determined by a single configuration of the first device, a more flexible resource selection method can be provided for the first device.

In a possible implementation manner of the first aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

Based on the above solution, the SCI sent by the first device to the second device may also carry third indication information for indicating the resource selection mode of the first device, so that the second device can select resources according to the first device The data transmission resources of the second device are determined in a way, which can reduce the transmission collision between the second device and the first device to a certain extent, and further improve the communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first device determines the reservation state of the sideline resource according to fourth indication information, where the fourth indication information is configuration information from the network device and/or or preconfigured information.

Optionally, the pre-configuration information may be configured by the network device, or may be pre-configured in the first device in advance, which is not limited in this application.

Based on the above solution, the first device may determine, according to the configuration and/or pre-configured fourth indication information from the network device, that the reservation status of the sideline resource is unreserved or reserved, providing the first device to determine the The specific implementation of the reserved state of the sideline resources improves the achievability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, before the first device selects the sideline resource through random selection or partial sensing, the method further includes:

The first device acquires fifth indication information, where the fifth indication information is used to indicate that the resource selection mode of the first device is random resource or partial sensing, and the fifth indication information is configuration information and/or pre-configuration from the network device information.

Based on the above solution, the first device may determine the resource selection mode of the first device according to the configuration and/or pre-configured fifth indication information from the network device, and provide the resources of the first device on the SL of the first device The specific implementation method of the selection method is selected to improve the achievability of the scheme.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first resource pool is a resource pool that multiplexes a full sensing mode and a partial sensing mode, or the first resource pool is a full sensing mode and a random selection mode Multiplexed resource pool.

Based on the above technical solutions, the process of selecting the sideline resources by the first device in a random selection manner or a partial sensing manner may specifically include that the first device selects sidelink resources from the first resource pool in a random selection manner or a partial sensing manner, wherein, The first resource pool may be determined according to the configuration and/or pre-configuration from the network device. The first resource pool includes a plurality of sideline resources for SL communication, and the first resource pool may be a resource pool multiplexing a full sensing mode and a partial sensing mode. Alternatively, the first resource pool may be a resource pool that multiplexes the full perception mode and the random selection mode, so that the solution can be applied to a variety of different network environments, and the flexibility of the solution implementation is improved.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the first priority is higher than the second priority, the first device preempts the reserved resources indicated by the sideline control information from the second device , wherein the first priority is used to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, and the second priority is used to indicate the sideline control information from the second device. The priority indicated by the priority information.

Optionally, the resource selection mode of the second device is a fully aware mode.

Based on the above technical solution, when the first device determines that the first priority is higher than the second priority, it can preempt the reserved resources indicated by the sideline control information of the second device, so that high-priority services can use other low-priority services The reserved resource transmission corresponding to the high-priority service improves the success rate of data transmission corresponding to the higher-priority service.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the first A device preempts the reserved resources indicated by the sideline control information from the second device.

Based on the above technical solutions, the first device may preempt the reserved resources indicated by the sideline control information from the second device only when the preset conditions are met. Wherein, the preset condition includes when the detected signal quality of the first device is lower than the first threshold and/or the first priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

A second aspect of an embodiment of the present application provides a sidelink communication method. The method is applied to a second device. In the method, the second device receives sidelink control information SCI from the first device on the sidelink resource. , wherein the SCI includes first indication information, where the first indication information is used to indicate that the reservation status of the sideline resource is unreserved.

Based on the above technical solutions, after the first device selects the sideline resource through random selection or partial sensing, it sends the SCI to the second device, so that the second device receives the sideline control from the first device on the sideline resource. Information SCI, wherein the SCI includes first indication information, the first indication information is used to indicate that the reservation status of the sideline resource is unreserved, and the partial sensing method is that the first device is based on the partial time in the sensing window The resource occupancy information of the unit selects the resource. Because the first device does not completely monitor the resource occupancy information of all time units in the sensing window during the process of selecting sideline resources through random selection or partial sensing, that is, when the first device does not monitor enough, the first device By carrying the SCI of the first indication information, the second device determines that the sideline resource is an unreserved resource. It can be avoided that the first device and the second device preempt the sideline resource, that is, the second device determines the reservation state of the sideline resource through the SCI sent by the first device, and the second device determines the reservation state of the sideline resource through detection. Compared with the method of the first device, the power consumption of the second device can be reduced, and the transmission collision caused by insufficient monitoring of the first device can be avoided, and the communication efficiency can be improved.

It should be noted that, in the implementation process of the second aspect of the embodiments of the present application, the time unit may specifically indicate a radio frame, subframe, time slot, symbol, or other time unit, etc., which is not specifically limited here.

In a possible implementation manner of the second aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

Based on the above technical solution, the reservation status of the sideline resource indicated by the first indication information carried in the SCI is unreserved or reserved. Wherein, when the reservation status is unreserved, it may indicate that the resource after the time unit where the SCI is located is not reserved; when the reservation status is reserved, it may indicate the reservation of at least one resource after the time unit where the SCI is located . Multiple implementations of the reservation state are provided, so that the second device can determine the multiple reservation states of the sideline resource through the SCI, which improves the implementability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the reservation of the at least one resource includes the reservation of the first data packet resource and/or the reservation of the second data packet resource. Wherein, the second data packet may be other data packets related to the first data packet, for example, the second data packet may be a retransmission data packet of the first data packet, or the second data packet may also be This application does not limit the service data package that is different from the first data package.

Based on the above technical solutions, the first indication information in the SCI can be used to indicate that the reservation status of the sideline resource is reserved, that is, when indicating the reservation of at least one resource after the time unit where the SCI is located, wherein the sideline resource is reserved. for transmitting the first data packet. The first data packet may be used to transmit periodic services, the reservation of the at least one resource may indicate the reservation of the resource of the first data packet in different periods, and/or the at least one resource may also indicate the same period , the reservation of the retransmission data packet of the first data packet, that is, the reservation of the resource of the first data packet. In addition, the at least one resource may also indicate reservation of the second data by the first data packet during different periods, where the second data packet may be a retransmission data packet of the first data packet, or the first data packet may be a retransmission data packet of the first data packet. The second data packet may also be a different service data packet from the first data packet, or, the second data packet may also be another data packet associated with the first data packet, which is not limited in this application. This implementation provides a specific implementation when the first indication information is used to indicate that the reservation status of the sideline resource is to indicate the reservation of at least one resource after the time unit where the SCI is located, which improves the implementability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first indication information is a reserved bit field and/or a resource reservation period field in the SCI.

Based on the above technical solution, the first indication information may be carried by a designated field in the SCI, that is, the first indication information may be carried by a reserved bit field and/or a resource reservation period field in the SCI. Thus, a specific implementation manner of the first indication information in the SCI is provided, and the implementability of the solution is improved.

In a possible implementation manner of the second aspect of the embodiment of the present application, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool.

Based on the above technical solution, the first resource pool may be determined by the first device according to the configuration and/or pre-configuration from the network device. The first resource pool includes a plurality of sideline resources for SL communication. When the first indication information is a resource reservation period field, the period value corresponding to the reservation state in the resource reservation period field does not belong to the first resource reservation period field. The period value or value set in the resource pool is 0, so as to indicate that the reservation status of the sideline resource is unreserved. Therefore, a specific implementation manner of the resource reservation period field is provided to improve the implementability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the value corresponding to the reservation status in the SCI is any one or more of the following values: [Nr, Nr+1, ..., ceil (log2(Nr))-1], where Nr is the number of cycles configured in the first resource pool, which is a positive integer, ceil means rounding up, log2 means taking the logarithm with the base 2, "[" and "]" to indicate multiple values listed.

Based on the above technical solution, the value corresponding to the reserved state in the SCI is any one or more of the following values: [Nr, Nr+1, ..., ceil(log2(Nr))-1], indicating that the side The reservation status of the row resource is reserved. Therefore, a specific implementation manner when the reservation state is reserved is provided, which improves the implementability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the reserved state of the sideline resource includes the state value of the time domain resource and/or the state value of the frequency domain resource in the SCI. When the state value and/or the state value of the frequency domain resource is: 0 or a value other than the preset value, the reservation state of the sideline resource is unreserved.

In a possible implementation manner of the second aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

Based on the above solution, the SCI received by the second device from the first device may also carry third indication information for indicating the resource selection mode of the first device, so that the second device can The resource selection method determines the data transmission resources of the second device, which can reduce the transmission collision between the second device and the first device to a certain extent, and further improve the communication efficiency.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first resource pool is a resource pool that multiplexes a full sensing mode and a partial sensing mode, or the first resource pool is a full sensing mode and a random selection. Resource pool for reuse.

Based on the above technical solutions, the process of selecting the sidelink resource by the first device in a random selection manner or a partial sensing manner may specifically include that the first device selects the sidelink resource on the first resource pool by a random selection manner or a partial sensing manner. Wherein, the first resource pool may be determined according to the configuration and/or pre-configuration from the network device, the first resource pool includes a plurality of side resources for SL communication, and the first resource pool may be fully aware The resource pool multiplexed with the partial sensing mode, or the first resource pool can be a resource pool multiplexed with the full sensing mode and the random selection mode, so that the solution can be applied to a variety of different network environments and improve the flexibility of the solution implementation sex.

In a possible implementation manner of the second aspect of the embodiment of the present application, the sideline resource selection manner of the second device is a partial sensing manner or a random selection manner.

When the second priority is higher than the first priority, the second device preempts the reserved resources indicated by the sideline control information from the first device, where the first priority is used to indicate the sideline from the first device The priority indicated by the priority indication information in the line control information, and the second priority is used to indicate the priority indicated by the priority indication information in the sideline control information sent by the second device.

Optionally, the resource selection mode of the first device is a fully aware mode.

Based on the above technical solution, when the second device determines that the second priority is higher than the first priority, it can preempt the reserved resources indicated by the sideline control information of the first device, so that the high-priority service can use other low-priority services The reserved resource transmission corresponding to the service improves the success rate of data transmission corresponding to the higher priority service.

In a possible implementation manner of the second aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the second priority is higher than a second threshold, the first device The second device preempts the reserved resources indicated by the sideline control information from the first device.

Based on the above technical solution, the second device can preempt the reserved resources indicated by the sideline control information from the first device only when the preset conditions are met. Wherein, the preset condition includes when the detected signal quality of the first device is lower than the first threshold and/or the first priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the second device and avoiding the influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

A third aspect of the embodiments of the present application provides a sidelink communication method, and the method is applied to a first device. In the method, the first device determines a resource selection mode of the sidelink SL according to a first parameter; thereafter , the first device determines a sidelink resource according to the resource selection mode of the sidelink SL, and the sidelink resource is used to send the transmission data of the SL.

Based on the above technical solution, the first device can determine the resource selection mode in the sidelink according to the first parameter. Compared with the first device that can only determine a single resource selection mode according to a single configuration of the network device, the first device can make the first The device can more flexibly and autonomously determine the resource selection mode in the SL according to the first parameter, so as to adapt to different scenarios and improve communication efficiency.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first parameter includes channel quality information and/or service attributes of the transmission data of the SL.

Based on the above technical solution, the first device determines the resource selection mode in the sidelink based on the first parameter, where the first parameter can be specifically used to indicate the channel quality information of the communication channel, and/or the first parameter The service attribute of the data to be transmitted by a device on the SL. Therefore, the resource selection mode determined by the first device according to the first parameter can be adapted to the current communication channel and/or the data to be transmitted. While providing the specific implementation mode of the first parameter, the first device can be Adapting to different scenarios or different network environments can further improve communication efficiency.

In a possible implementation manner of the third aspect of the embodiment of the present application, the service attribute of the transmission data of the SL is at least one of the following:

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

SL's transmission reliability requirements for transmission data.

The channel quality information is at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

The received signal strength indicates RSSI.

Based on the above implementation scheme, the channel quality information and/or the service attribute of the transmission data of the SL can be implemented in the above-mentioned various manners, and a more specific implementation manner of the first parameter is provided to improve the implementability of the scheme.

In a possible implementation manner of the third aspect of the embodiment of the present application, the resource selection manner includes at least one of the following:

Totally perceptual way.

Or, the resource selection method includes at least one of the following:

random selection;

part of perception;

full perception;

Wherein, the random selection method is that the first device randomly selects resources with a certain probability in the resource selection window, and the partial sensing method is that the first device selects resources according to the resource occupancy information of some time units in the sensing window, the complete The perception is that the first device selects resources according to the resource occupation information of all time units that can be detected in the perception window.

Based on the above technical solution, the first device determines the resource selection mode of the SL among the above-mentioned multiple resource selection modes. Compared with the first device that can only determine a single resource selection mode according to a single configuration of the network device, it can provide the first device with more Choose a way for flexible resources.

In a possible implementation manner of the third aspect of the embodiment of the present application, after the first device determines the sidelink resource in the first resource pool according to the resource selection method of the sidelink, the method further includes:

The first device determines the reservation state of the sideline resource;

The first device sends the sideline control information SCI to the second device according to the sideline resource, where the SCI includes first indication information, where the first indication information is used to indicate the reservation state of the sideline resource.

Based on the above technical solution, the reservation status of the sideline resource may specifically be reserved or unreserved. The first device indicates the reservation status of the sidelink resource to the second device through the SCI, so that the second device can further determine the reservation status of the sidelink resource through the SCI. Compared with the second device detecting and determining the reserved state of the sideline resources by itself, the power consumption of the second device can be reduced.

In a possible implementation manner of the third aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

Based on the above technical solution, the reservation status of the sideline resource indicated by the first indication information carried in the SCI is unreserved or reserved, wherein, when the reservation status is unreserved, it can indicate where the SCI is located Resources after the time unit are not reserved. When the reservation state is reserved, it can indicate the reservation of at least one resource after the time unit where the SCI is located, and multiple implementations of the reservation state are provided, which enables the second device to determine the sideline through the SCI Multiple reservation states of resources improve the achievability of the solution.

In a possible implementation manner of the third aspect of the embodiment of the present application, the method further includes:

The first device acquires second indication information, where the second indication information is used to indicate that the resource selection manner includes at least two resource selection manners, and the at least two resource selection manners include:

Totally perceptual way.

Based on the foregoing technical solution, the first device may acquire second indication information for indicating that the resource selection manner includes at least two resource selection manners. In the process that the first device determines the resource selection mode of the SL among the at least two resource selection modes, compared with the first device that can only determine a single resource selection mode according to a single configuration of the network device, it can provide the first device with more Choose a way for flexible resources.

In a possible implementation manner of the third aspect of the embodiment of the present application, when the measured value of the channel quality information is smaller than the first threshold value, or when the service attribute of the transmission data of the SL satisfies a preset condition: the side The resource selection mode of the uplink is a random selection mode of enabling resource reservation between different transport blocks; or a partial sensing mode of enabling resource reservation between different transport blocks.

Based on the above technical solutions, in the above at least two resource selection methods, when the measured value of the channel quality information is less than the first threshold, that is, when the first device determines that the current channel is relatively idle, the first device can determine the The resource selection mode of the sidelink is a random selection mode of enabling resource reservation between different transport blocks, or a partial sensing mode of enabling resource reservation between different transport blocks. Or, when the service attribute of the transmission data of the SL meets the preset condition, that is, the first device determines that the current channel is relatively idle or the service attribute of the transmission data of the SL has a higher priority/lower latency requirement/lower communication distance requirement/ When the transmission reliability requirement is low, it can be determined that the resource selection mode of the sidelink is a random selection mode of enabling resource reservation between different transport blocks, or a mode of enabling resource reservation between different transport blocks. part of perception. Compared with other resource selection methods, the channel utilization can be improved by enabling resource reservation between different transport blocks while reducing the power consumption of the first device.

In a possible implementation manner of the third aspect of the embodiment of the present application, the measured value of the channel quality information is greater than the second threshold value, and/or when the service attribute of the transmission data of the SL does not meet the preset condition, The resource selection method of the sidelink includes one of the following at least two methods:

Random selection of resource reservation off between different transport blocks; or,

Partially aware way of resource reservation off between different transport blocks; or,

Totally perceptual way.

Optionally, the second threshold value may be greater than or equal to the first threshold value.

Based on the above technical solutions, in the above at least two resource selection methods, when the measured value of the channel quality information is greater than the second threshold, that is, when the first device determines that the current channel is busy, the first device can determine the The resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or a partial sensing mode or a complete sensing mode in which the resource reservation between different transport blocks is turned off. Or, when the service attribute of the transmission data of the SL does not meet the preset condition, that is, the first device determines that the current channel is relatively busy or the service attribute of the transmission data of the SL has a lower priority/higher delay requirement/higher communication distance requirement / When the transmission reliability requirement is high, it can be determined that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or the part where the resource reservation between different transport blocks is turned off Perceived way, or fully sensed way. Compared with other resource selection methods, the channel utilization can be improved by enabling resource reservation between different transport blocks while reducing the power consumption of the first device.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first threshold value and/or the second threshold value and the priority in the sideline control information sent and/or received by the first device level indication information.

Based on the above technical solution, the first threshold value may be specifically associated with the priority indication information in the sideline control information SCI sent and/or received by the first device, so that the information sent and/or received by the first device The priority indication information in the SCI determines the first threshold value, and provides a specific implementation manner of the first threshold value. Alternatively, the second threshold value may be specifically associated with the priority indication information in the sideline control information SCI sent and/or received by the first device, so that the information in the SCI sent and/or received by the first device The priority indication information determines the second threshold value, provides a specific implementation manner of the second threshold value, and improves the implementability of the solution.

In a possible implementation manner of the third aspect of the embodiment of the present application, the numerical value of the priority indication information in the sideline control information sent and/or received by the first device is negative to the value of the first threshold value related.

Based on the above technical solution, when the value of the priority indication information in the sideline control information SCI sent by the first device is larger, the priority indicated by the SCI is lower, and a smaller first threshold value is used. Wherein, a smaller first threshold value may make the first device more likely to determine that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or , a partial perceptual mode in which resource reservations between different transport blocks are turned off, or a fully perceptual mode, thereby reducing transmission collisions.

On the contrary, the smaller the value of the priority indication information in the sideline control information SCI sent by the first device is, the higher the priority indicated by the SCI is, and a larger first threshold value is used. Wherein, a larger first threshold value can make the first device more likely to determine that the resource selection mode of the sidelink is a random selection mode of resource reservation enablement between different transport blocks, Or the possibility of a partially perceptual manner in which resource reservation between different transport blocks is enabled, thereby improving the success rate of data transmission.

In a possible implementation manner of the third aspect of the embodiment of the present application, the numerical value of the priority indication information in the sideline control information sent by the first device is positively correlated with the size of the second threshold value.

Based on the above technical solution, when the value of the priority indication information in the sideline control information SCI sent by the first device is larger, the priority indicated by the SCI is lower, and a larger second threshold value is used. Wherein, a larger second threshold value can make the first device have a greater possibility to determine that the resource selection mode of the sidelink is a random selection mode of resource reservation enablement between different transport blocks, Or a partial sensing method of enabling resource reservation between different transport blocks, thereby improving the success rate of data transmission.

On the contrary, the smaller the value of the priority indication information in the sideline control information SCI sent by the first device is, the higher the priority indicated by the SCI is, and the smaller second threshold value is used. Wherein, a smaller second threshold value can make the first device have a greater possibility to determine that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or , the possibility of a partially perceptual approach, or a fully perceptual approach, where resource reservations between different transport blocks are turned off, thereby reducing transmission collisions.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first threshold and/or the second threshold are pre-configured.

Based on the above technical solutions, the first threshold value and/or the second threshold value may be pre-configured, or may be configured from a network device, providing the first threshold value and/or the second threshold value The specific implementation of the limit value improves the achievability of the scheme.

The first device sends the sideline control information SCI to the second device according to the sideline resource, where the SCI includes second indication information, and the second indication information is used to indicate that the resource selection mode of the sideline resource includes the following at least two ways one of:

Totally perceptual way.

Based on the above technical solution, the SCI sent by the first device to the second device may further carry second indication information for indicating the resource selection mode of the sideline resource. Therefore, the second device can determine the data transmission resource of the second device according to the resource selection mode of the sideline resource, which can reduce the transmission collision between the second device and the first device, and further improve the communication efficiency.

In a possible implementation manner of the third aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

Based on the above technical solution, the SCI sent by the first device to the second device may further carry third indication information for indicating the resource selection mode of the first device. Therefore, the second device can determine the data transmission resources of the second device according to the resource selection method of the first device, which can reduce the transmission collision between the second device and the first device, and further improve the communication efficiency.

In a possible implementation manner of the third aspect of the embodiment of the present application, the sideline resource selection manner of the first device is a partial sensing manner or a random selection manner.

When the first priority is higher than the second priority, the first device preempts the reserved resources indicated by the sideline control information from the second device, where the first priority is used to indicate the The priority level in the sideline control information indicates the priority level, and the second priority level is used to indicate the priority level indicated by the priority level indication information in the sideline control information from the second device.

Based on the above technical solution, when the first device determines that the first priority is higher than the second priority, it can preempt the reserved resources indicated by the sideline control information of the second device, so that the high-priority service can use other low-priority services The reserved resource transmission corresponding to the service improves the success rate of data transmission corresponding to the higher priority service.

In a possible implementation manner of the third aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a third threshold and/or when the first priority is higher than a fourth threshold, the A device preempts the reserved resources indicated by the sideline control information from the second device.

Based on the above technical solutions, the first device may preempt the reserved resources indicated by the sideline control information from the second device only when the preset conditions are met. Wherein, the preset condition includes when the detected signal quality of the first device is lower than the third threshold and/or the first priority is higher than the fourth threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

A fourth aspect of the embodiments of the present application provides a sidelink communication method, and the method is applied to a first device. In the method, the first device acquires first indication information, where the first indication information is used to indicate the at least two resource selection modes in the first device; then, the first device determines a target resource selection mode among the at least two resource selection modes according to the first indication information; thereafter, the first device selects a target resource mode according to the target resource Identify sideline resources.

Based on the above technical solutions, after acquiring the first indication information for indicating at least two resource selection modes, the first device may determine a target resource selection mode among the at least two resource selection modes, and further according to the target resource selection mode Identify sideline resources. Compared with the fact that the first device can only determine a single resource selection mode according to a single configuration of the network device, a more flexible resource selection mode can be provided for the first device.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the at least two resource selection manners include the following at least two:

Totally perceptual way.

Wherein, the random selection method is that the first device randomly selects resources with a certain probability in the resource selection window, and the partial sensing method is that the first device selects resources according to the resource occupancy information of some time units in the sensing window, and the complete sensing method The perception is that the first device selects resources according to the resource occupation information of all time units that can be detected in the perception window.

Based on the above technical solutions, in the at least two resource selection methods, there may be multiple resource reservation situations between different transport blocks in the random selection method and the partial selection method, and the process of determining the target resource selection method for the first device A variety of specific implementation methods are provided to improve the achievability of the solution.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, after the first device determines the side-traffic resource according to the target resource selection method, the method further includes: the first device determines a preset of the side-traffic resource. After that, the first device sends the first sideline control information SCI to the second device according to the sideline resource, where the SCI includes a first indication, and the first indication is used to indicate the reservation state of the sideline resource.

Based on the above technical solution, the reservation status of the sideline resource may specifically be reserved or unreserved. The first device indicates the reservation state of the sideline resource to the second device through the first SCI, so that the second device can further determine the reservation state of the sideline resource through the first SCI, and the second device can detect and determine by itself. Compared with the reserved state of the sideline resources, the power consumption of the second device can be reduced.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, after the first device determines the side-traffic resource according to the target resource selection method, the method further includes: the first device forwards the side-traffic resource to the first device according to the side-traffic resource. The second device sends the second sideline control information SCI, where the SCI includes second indication information, and the second indication information is used to indicate that the resource selection mode of the sideline resource includes one of the following at least two ways:

Totally perceptual way.

Based on the above solution, the second SCI sent by the first device to the second device may further carry second indication information for indicating the resource selection mode of the sideline resource. Therefore, the second device can determine the resource selection mode of the sideline resource, and further determine the data transmission resource of the second device according to the resource selection mode of the sideline resource, which can reduce the number of the second device and the first device to a certain extent. Transmission collision between devices further improves communication efficiency.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, after the first device determines the side-traffic resource according to the target resource selection method, the method further includes: the first device forwards the side-traffic resource to the first device according to the side-traffic resource. The second device sends third sideline control information SCI, where the SCI further includes third indication information, where the third indication information is used to indicate the resource selection mode of the first device.

Based on the above solution, the third SCI sent by the first device to the second device may further carry third indication information for indicating the resource selection mode of the first device. Therefore, the second device can determine the data transmission resources of the second device according to the resource selection mode of the first device, which can reduce the transmission collision between the second device and the first device to a certain extent, and further improve the communication efficiency.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the sideline resource selection manner of the first device is a partial sensing manner or a random selection manner.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the first A device preempts the reserved resources indicated by the sideline control information from the second device.

A fifth aspect of the embodiments of the present application provides a sidelink communication method, and the method is applied to a second device. In the method, the second device receives first sideline control information SCI from the first device, and the second device receives the first sideline control information SCI from the first device. An SCI includes first indication information, and the first indication information is used to indicate the sideline resource selection mode of the first device; the second device determines the data transmission resources of the second device according to the first indication information.

Based on the above solution, the SCI sent by the first device to the second device may carry first indication information for indicating the resource selection mode of the first device, so that the second device can select the resource according to the resource selection mode of the first device. A data transmission resource of the second device is determined. Compared with the second device determining the data transmission resources of the second device through detection, while reducing the power consumption of the second device, it can also reduce the transmission collision between the second device and the first device to a certain extent, and improve the performance of the second device. communication efficiency.

In a possible implementation manner of the fifth aspect of the embodiment of the present application, the second device determining the data transmission resource of the second device according to the first indication information includes:

The second device determines whether to preempt the reserved resources indicated by the first SCI according to the priority indication information in the SCI to be sent, and/or the received priority indication information in the SCI from the first device, wherein,

The resource selection mode of the first device is a fully aware mode, and the resource selection mode of the second device is a random selection mode; or,

The resource selection mode of the first device is a full perception mode, and the resource selection mode of the second device is a partial perception selection mode; or,

The resource selection mode of the first device is a partial sensing mode, and the resource selection mode of the second device is a random selection mode; or,

The resource selection mode of the first device is random selection, and the resource selection mode of the second device is partial sensing mode;

Optionally, the received SCI from the first device may include the first SCI.

Based on the above technical solution, the second device can dynamically determine whether it can preempt the reserved resources of the second device according to the service priority of the SCI to be sent by the second device and the service priority of the SCI received from the first device, so as to improve the The targeted preemption prevents low-priority services from preempting the reserved resources of high-priority services.

When the second device determines that the priority indicated by the priority indication information in the to-be-sent SCI is greater than the preset threshold, the second device preempts the reserved resource indicated by the first SCI.

Optionally, the received SCI from the first device may include the first SCI.

Based on the above technical solution, since the numerical value of the priority indication information in the SCI is negatively correlated with the service priority of the SCI, that is, the larger the numerical value of the priority indication information in the SCI, the lower the service priority of the SCI; otherwise , the smaller the value of the priority indication information in the SCI, the higher the service priority of the SCI. Wherein, when the second device determines that the priority indicated by the priority indication information in the to-be-sent SCI is greater than the preset threshold, that is, when the second device determines that the service priority of the to-be-sent SCI is higher, the first Only the second device preempts the reserved resources indicated by the SCI from the first device. Therefore, in the second device, when the service priority of the to-be-sent SCI is higher, the transmission success rate of the data corresponding to the to-be-sent SCI is improved.

When the signal quality threshold of the SCI and/or data received from the first device is higher than a preset threshold, and the second device determines that the priority indicated by the priority indication information in the SCI to be sent is greater than the preset threshold When the threshold is set, the second device preempts the reserved resources indicated by the first SCI.

Optionally, the received SCI from the first device may include the first SCI.

Based on the above technical solution, when the second device determines that the received signal quality threshold of the SCI and/or data from the first device is higher than the preset threshold, it determines that the transmission resources used by the first device are relatively idle, and the second device determines that the transmission resources used by the first device are relatively idle. Preempting the transmission resource used by the first device by the device will not affect the first device. Therefore, on the premise of not affecting the communication of other devices, the utilization rate of the reserved resources indicated by the first SCI is improved.

When the priority indicated by the priority indication information in the SCI to be sent is higher than the priority indicated by the priority indication information in the SCI received from the first device, the second device preempts the priority indicated by the first SCI Reserve resources.

Optionally, the received SCI from the first device may include the first SCI.

Based on the above technical solution, when the second device determines that the priority indicated by the indication information of the SCI to be sent is higher than the priority indicated by the priority indication information in the SCI received from the first device, the second device can determine the SCI to be sent. The service priority of is higher than the service priority of the SCI received from the first device. Therefore, the second device preempts the reserved resource indicated by the first SCI, so that data corresponding to a higher service priority can be transmitted using the reserved resource, improves the utilization rate of the reserved resource indicated by the first SCI, and improves the The transmission success rate of the data corresponding to the SCI to be sent.

In a possible implementation manner of the fifth aspect of the embodiment of the present application, the sideline resource selection manner of the first device includes at least one of the following:

Totally perceptual way.

Or, the sideline resource selection manner of the first device includes at least one of the following:

random selection;

part of perception;

full perception;

In a possible implementation manner of the fifth aspect of the embodiment of the present application, the first indication information includes a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information .

Based on the above technical solutions, the first indication information can be implemented in various ways, that is, in the reserved field in the first-level sideline control information and/or the reserved field in the second-level sideline control information in the SCI, to achieve The bearing of the first indication information provides a specific implementation manner of the first indication information, and improves the implementability of the solution.

In a possible implementation manner of the fifth aspect of the embodiment of the present application, the sideline resource selection manner of the second device is a partial sensing manner or a random selection manner;

In a possible implementation manner of the fifth aspect of the embodiment of the present application, when the detected signal quality of the second device is lower than a first threshold and/or when the second priority is higher than a second threshold, the first The second device preempts the reserved resources indicated by the sideline control information from the first device.

Based on the above technical solutions, the second device may preempt the reserved resources indicated by the sideline control information from the first device only when the preset conditions are met. Wherein, the preset condition includes when the detected signal quality of the second device is lower than the first threshold and/or the second priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the second device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

A sixth aspect of the embodiments of the present application provides a sidelink communication method, which is applied to a first device. In the method, the first device sends first sideline control information SCI to a second device, and the first device sends first sidelink control information SCI to a second device. The SCI includes first indication information, where the first indication information is used to indicate a sideline resource selection mode of the first device.

Based on the above solution, the SCI sent by the first device to the second device may carry first indication information for indicating the resource selection mode of the first device, so that the second device can select the resource according to the resource selection mode of the first device. Determining the data transmission resources of the second device, compared with the second device determining the data transmission resources of the second device through detection, while reducing the power consumption of the second device, can also reduce the second device and the second device to a certain extent. The transmission collision between the first devices improves the communication efficiency.

In a possible implementation manner of the sixth aspect of the embodiment of the present application, the sideline resource selection manner of the first device includes at least one of the following:

Totally perceptual way.

Or, the resource selection manner of the first device includes at least one of the following:

random selection;

part of perception;

full perception;

In a possible implementation manner of the sixth aspect of the embodiment of the present application, the first indication information includes a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information .

Based on the above technical solutions, the first indication information can be implemented in various ways, that is, in the reserved field in the first-level sideline control information and/or the reserved field in the second-level sideline control information in the SCI to realize the first indication The bearer of the indication information provides a specific implementation manner of the first indication information, and improves the implementability of the solution.

In a possible implementation manner of the sixth aspect of the embodiment of the present application, the sideline resource selection manner of the second device is a partial sensing manner or a random selection manner;

In a possible implementation manner of the sixth aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the A device preempts the reserved resources indicated by the sideline control information from the second device.

A seventh aspect of an embodiment of the present application provides a communication device, including:

a processing unit, configured to select a sideline resource through a random selection method or a partial sensing method, where the partial sensing method is that the first device selects resources according to resource occupation information of a partial time unit in the sensing window;

A transceiver unit, configured to send the sideline control information SCI to the second device on the sideline resource, wherein the SCI includes first indication information, and the first indication information is used to indicate the preset of the sideline resource. The reservation status is unreserved.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the processing unit is specifically configured to: select a sideline resource on a first resource pool by a random selection method or a partial sensing method, wherein the activation on the first resource pool is Or the reservation of inter-cycle packet transmissions is enabled.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the reservation of the at least one resource includes the reservation of the first data packet resource, and/or,

Reservation of resources for a second data packet, where the second data packet may be another data packet associated with the first data packet, for example, the second data packet may be a retransmission data packet of the first data packet, or , the second data packet may also be a service data packet different from the first data packet, or the second data packet may also be other data packets, which is not limited in this application.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the first indication information is a reserved bit field and/or a resource reservation period field in the SCI.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the value corresponding to the reservation state in the SCI is any one or more of the following values: [Nr, Nr+1, , ceil (log2(Nr))-1], where Nr is the number of cycles configured in the first resource pool, which is a positive integer, ceil means rounding up, log2 means taking the logarithm with the base 2, "[" and "]" to indicate multiple values listed.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the reserved state of the sideline resource includes the state value of the time domain resource and/or the state value of the frequency domain resource in the SCI. The state value and/or the state value of the frequency domain resource is: 0 or a value other than the preset value, and the reservation state of the sideline resource is unreserved.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the processing unit is further configured to:

When the first parameter satisfies the preset condition, it is determined that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode, where the first parameter includes at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

Received Signal Strength Indication RSSI;

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the processing unit is further configured to determine, according to the first parameter, that the reservation status of the sideline resource is unreserved or reserved.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the transceiver unit is further configured to:

Obtain second indication information, where the second indication information is used to indicate at least two resource selection modes.

When the first parameter satisfies the preset condition, determining that the resource selection mode of the SL is the random selection mode or the partial sensing mode includes:

When the first parameter satisfies the preset condition, the resource selection mode of the SL is determined to be a random selection mode or a partial sensing mode among the at least two resource selection modes, wherein the at least two resource selection modes include at least two of the following:

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the first device determines the reservation state of the sideline resource according to fourth indication information, where the fourth indication information is configuration information from the network device and/or or preconfigured information.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, before the first device selects the sideline resource through random selection or partial sensing, the transceiver unit is further configured to:

Obtain fifth indication information, where the fifth indication information is used to indicate that the resource selection mode of the first device is random resource or partial sensing, and the fifth indication information is configuration information and/or pre-configuration information from the network device.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, the first resource pool is a resource pool that multiplexes a full sensing mode and a partial sensing mode, or the first resource pool is a full sensing mode and a random selection mode Multiplexed resource pool.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, when the first priority is higher than the second priority, the first device preempts the reserved resources indicated by the sideline control information from the second device , wherein the first priority is used to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, and the second priority is used to indicate the sideline control information from the second device. The priority indicated by the priority information.

In a possible implementation manner of the seventh aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the A device preempts the reserved resources indicated by the sideline control information from the second device.

For the specific implementation steps of the seventh aspect of the present application and various possible implementations of the seventh aspect, as well as the beneficial effects brought by each possible implementation, reference may be made to the descriptions in the various possible implementations in the first aspect , and will not be repeated here.

An eighth aspect of an embodiment of the present application provides a communication device, including:

a transceiver unit, configured to receive, on the sideline resource, the sideline control information SCI sent by the first device, wherein the SCI includes first indication information, and the first indication information is used to indicate the sideline resource of the sideline resource. The reservation status is unreserved.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the reservation of the at least one resource includes the reservation of the first data packet resource, and/or,

Reservation of resources for a second data packet, where the second data packet may be another data packet associated with the first data packet, for example, the second data packet may be a retransmission data packet of the first data packet, or , the second data packet may also be a different service data packet from the first data packet, which is not limited in this application.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the first indication information is a reserved bit field and/or a resource reservation period field in the SCI.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the value corresponding to the reservation status in the SCI is any one or more of the following values: [Nr, Nr+1, . . . , ceil (log2(Nr))-1], where Nr is the number of cycles configured in the first resource pool, which is a positive integer, ceil means rounding up, log2 means taking the logarithm with the base 2, "[" and "]" to indicate multiple values listed.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the reserved status of the sideline resources includes the status value of the time domain resource and/or the status value of the frequency domain resource in the SCI. The state value and/or the state value of the frequency domain resource is: 0 or a value other than the preset value, and the reservation state of the sideline resource is unreserved.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the first resource pool is a resource pool that multiplexes a full sensing mode and a partial sensing mode, or the first resource pool is a full sensing mode and a random selection Resource pool for reuse.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, the communication apparatus further includes a processing unit, and a sideline resource selection manner of the communication apparatus is a partial sensing manner or a random selection manner;

When the second priority is higher than the first priority, the processing unit is configured to control the transceiver unit to preempt the reserved resource indicated by the sideline control information from the first device, where the first priority is used to indicate the resource from the first device The priority indicated by the priority indication information in the sideline control information of a device, and the second priority is used to indicate the priority indicated by the priority indication information in the sideline control information sent by the second device.

In a possible implementation manner of the eighth aspect of the embodiment of the present application, when the detected signal quality of the second device is lower than the first threshold and/or when the first priority is higher than the second threshold, the processing The unit is configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the second device.

For the specific implementation steps of the eighth aspect of the present application and various possible implementations of the eighth aspect, as well as the beneficial effects brought by each possible implementation, reference may be made to the descriptions in the various possible implementations in the second aspect , and will not be repeated here.

A ninth aspect of an embodiment of the present application provides a communication device, including:

a processing unit, configured to determine a resource selection mode of the sidelink SL according to the first parameter;

The processing unit is further configured to determine a sidelink resource according to the resource selection mode of the sidelink SL, where the sidelink resource is used to send the transmission data of the SL.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the first parameter includes at least one of the following: channel quality information and/or a service attribute of the transmission data of the SL;

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the service attribute of the transmission data of the SL is at least one of the following:

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.

The channel quality information is at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

The received signal strength indicates RSSI.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the resource selection manner includes at least one of the following:

Totally perceptual way.

Or, the resource selection method includes at least one of the following:

random selection;

part of perception;

full perception;

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the processing unit is further configured to determine the reservation state of the sideline resource;

The transceiver unit is configured to send the sideline control information SCI to the second device according to the sideline resource, where the SCI includes first indication information, and the first indication information is used to indicate the reservation state of the sideline resource.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved , the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the transceiver unit is further configured to acquire second indication information, where the second indication information is used to indicate that the resource selection manner includes at least two resource selection manners, The at least two resource selection methods include:

Totally perceptual way.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, when the measured value of the channel quality information is smaller than the first threshold value, or when the service attribute of the transmission data of the SL satisfies a preset condition: the side The resource selection mode of the uplink is a random selection mode of enabling resource reservation between different transport blocks; or a partial sensing mode of enabling resource reservation between different transport blocks.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the measured value of the channel quality information is greater than the second threshold value, and/or when the service attribute of the transmission data of the SL does not meet the preset condition, The resource selection method of the sidelink includes one of the following at least two methods:

Totally perceptual way.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the first threshold value and/or the second threshold value and the priority in the sideline control information sent and/or received by the first device level indication information.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the numerical value of the priority indication information in the sideline control information sent and/or received by the first device is negative with the size of the first threshold value related.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the numerical value of the priority indication information in the sideline control information sent by the first device is positively correlated with the size of the second threshold value.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the first threshold and/or the second threshold are pre-configured.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the transceiver unit is further configured to send sideline control information SCI to the second device according to the sideline resource, where the SCI includes second indication information, and the first The second indication information is used to indicate that the resource selection method of the sideline resource includes one of the following at least two methods:

Totally perceptual way.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

In a possible implementation manner of the ninth aspect of the embodiment of the present application, the sidelink resource selection manner of the communication device is a partial sensing manner or a random selection manner;

When the first priority is higher than the second priority, the processing unit is further configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the second device, where the first priority is used to indicate The priority indicated by the priority indication information in the sideline control information sent by the first device, and the second priority is used to indicate the priority indicated by the priority indication information in the sideline control information from the second device .

In a possible implementation manner of the ninth aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a third threshold and/or when the first priority is higher than a fourth threshold, the processing The unit is specifically configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the second device.

For the specific implementation steps of the ninth aspect of the present application and various possible implementations of the ninth aspect, as well as the beneficial effects brought by each possible implementation, reference may be made to the descriptions in the various possible implementations in the third aspect , and will not be repeated here.

A tenth aspect of the embodiments of the present application provides a communication device, including:

a transceiver unit, configured to acquire first indication information, where the first indication information is used to indicate at least two resource selection modes in the first device;

and a processing unit, configured to determine a target resource selection mode among the at least two resource selection modes according to the first indication information; and determine a sideline resource according to the target resource selection mode.

In a possible implementation manner of the tenth aspect of the embodiment of the present application, the at least two resource selection manners include the following at least two:

full perception;

In a possible implementation manner of the tenth aspect of the embodiment of the present application, after the first device determines the sideline resource according to the target resource selection method, the processing unit is further configured to determine the reservation state of the sideline resource ;

The transceiver unit is further configured to send the first sideline control information SCI to the second device according to the sideline resource, where the SCI includes a first indication, and the first indication is used to indicate the reservation state of the sideline resource.

In a possible implementation manner of the tenth aspect of the embodiment of the present application, after the first device determines the sideline resource according to the target resource selection manner, the transceiver unit is further configured to:

Send second sideline control information SCI to the second device according to the sideline resource, where the SCI includes second indication information, and the second indication information is used to indicate that the resource selection mode of the sideline resource includes at least two of the following ways. A sort of:

Totally perceptual way.

Send third sideline control information SCI to the second device according to the sideline resource, where the SCI further includes third indication information, where the third indication information is used to indicate the resource selection mode of the first device.

In a possible implementation manner of the tenth aspect of the embodiment of the present application, the target resource selection manner is a partial sensing manner or a random selection manner;

In a possible implementation manner of the tenth aspect of the embodiment of the present application, when the signal quality of the first device detected by the transceiver unit is lower than the first threshold and/or when the first priority is higher than the second threshold, The processing unit is specifically configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the second device.

For the specific implementation steps of the tenth aspect of the present application and various possible implementations of the tenth aspect, as well as the beneficial effects brought by each possible implementation, reference may be made to the descriptions in the various possible implementations in the fourth aspect , and will not be repeated here.

An eleventh aspect of the embodiments of the present application provides a communication device, including:

A transceiver unit, configured to receive first sideline control information SCI from a first device, where the first SCI includes first indication information, and the first indication information is used to indicate a sideline resource selection mode of the first device ;

and a processing unit, configured to determine the data transmission resource of the second device according to the first indication information.

In a possible implementation manner of the eleventh aspect of the embodiment of the present application, the processing unit is specifically configured to:

According to the priority indication information in the SCI to be sent and/or the priority indication information in the SCI received from the first device, it is determined whether to preempt the reserved resources indicated by the first SCI, wherein,

Optionally, the received SCI from the first device may include the first SCI.

When it is determined that the priority indication information in the SCI to be sent is smaller than a preset threshold, the reserved resource indicated by the first SCI is preempted.

Optionally, the received SCI from the first device may include the first SCI.

The threshold of the measured value of the received SCI and/or data signal quality information from the first device is higher than the preset threshold, and it is determined that the priority indicated by the priority indication information in the SCI to be sent is greater than When the preset threshold is reached, the reserved resources indicated by the first SCI are preempted.

Optionally, the received SCI from the first device may include the first SCI.

When the priority indicated by the priority indication information in the SCI to be sent is higher than the priority indicated by the priority indication information in the SCI received from the first device, the transceiver unit is controlled to preempt the priority indicated by the first SCI Reserve resources.

Optionally, the received SCI from the first device may include the first SCI.

In a possible implementation manner of the eleventh aspect of the embodiment of the present application, the sideline resource selection manner of the first device includes at least one of the following:

Totally perceptual way.

random selection;

part of perception;

full perception;

In a possible implementation manner of the eleventh aspect of the embodiment of the present application, the first indication information includes a reserved field in the first-level sideline control information and/or a reservation in the second-level sideline control information field.

In a possible implementation manner of the eleventh aspect of the embodiment of the present application, the sidelink resource selection manner of the communication device is a partial sensing manner or a random selection manner;

When the second priority is higher than the first priority, the processing unit is further configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the first device, where the first priority is used to indicate the priority indicated by the priority indication information in the sideline control information from the first device, and the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information sent by the second device .

In a possible implementation manner of the eleventh aspect of the embodiment of the present application, when the detected signal quality of the first device is lower than a first threshold and/or when the second priority is higher than a second threshold, the The processing unit is specifically configured to control the transceiver unit to preempt the reserved resources indicated by the sideline control information from the first device.

For the specific implementation steps of the eleventh aspect and various possible implementations of the eleventh aspect of the present application, and the beneficial effects brought by each possible implementation, reference may be made to the various possible implementations in the fifth aspect. description, which will not be repeated here.

A twelfth aspect of an embodiment of the present application provides a communication device, including:

a sending unit, configured to send the first sideline control information SCI to the second device, where the first SCI includes first indication information, and the first indication information is used to indicate a sideline resource selection mode of the first device;

In a possible implementation manner of the twelfth aspect of the embodiment of the present application, the sideline resource selection manner of the first device includes at least one of the following:

Totally perceptual way.

random selection;

part of perception;

full perception;

The random selection method is that the first device randomly selects resources with a certain probability in the resource selection window, and the partial sensing method is that the first device selects resources according to the resource occupation information of part of the time unit in the sensing window The complete perception is that the first device selects resources according to resource occupation information of all time units that can be detected in the perception window.

In a possible implementation manner of the twelfth aspect of the embodiment of the present application, the first indication information includes a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information field.

In a possible implementation manner of the twelfth aspect of the embodiment of the present application, the sidelink resource selection manner of the communication device is a partial sensing manner or a random selection manner;

For the specific implementation steps of the twelfth aspect of the present application and various possible implementations of the twelfth aspect, as well as the beneficial effects brought by each possible implementation, reference may be made to the various possible implementations in the sixth aspect. description, which will not be repeated here.

A thirteenth aspect of an embodiment of the present application provides a communication device, and the communication device may specifically be a first device or a second device, wherein the communication device includes a processor and a communication interface, and the communication interface is coupled to the processor, The processor is used to run a computer program or instructions, so that the method described in the foregoing first aspect or any possible implementation manner of the first aspect is executed, or, enabling the foregoing second aspect or any one possible implementation of the second aspect The method described in the method is executed, or, the method described in the foregoing third aspect or any one possible implementation manner of the third aspect is executed, or, the foregoing fourth aspect or any one possible implementation manner of the fourth aspect is caused. The method described in the method is performed, or, the method described in the fifth aspect or any possible implementation manner of the fifth aspect is performed, or, the sixth aspect or any possible implementation manner of the sixth aspect is performed. The method described is executed.

A fourteenth aspect of an embodiment of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the first aspect or any of the first aspects. A possible implementation manner, or the processor executes the method described in the second aspect or any of the possible implementation manners of the second aspect, or the processor executes the third aspect or any of the third aspect. The method described in a possible implementation manner, or the processor executes the method described in the fourth aspect or any possible implementation manner of the fourth aspect, or the processor executes the fifth aspect or The method described in any possible implementation manner of the fifth aspect, or the processor executes the method described in the sixth aspect or any possible implementation manner of the sixth aspect.

A fifteenth aspect of the embodiments of the present application provides a computer program product (or computer program) that stores one or more computers. When the computer program product is executed by the processor, the processor executes the first aspect or the first aspect above. On the one hand, any possible implementation manner, or, the processor executes the method described in the second aspect or any possible implementation manner of the second aspect, or the processor executes the third aspect or the method described above. The method described in any possible implementation manner of the third aspect, or the processor executes the method described in the fourth aspect or any possible implementation manner of the fourth aspect, or the processor executes the method described in the foregoing fourth aspect. The method described in the fifth aspect or any possible implementation manner of the fifth aspect, or the processor executes the method described in the sixth aspect or any possible implementation manner of the sixth aspect.

A sixteenth aspect of an embodiment of the present application provides a chip system, where the chip system includes a processor, configured to support an access network device to implement the first aspect or any possible implementation manner of the first aspect, or to implement the above-mentioned first aspect Any possible implementation manner of the second aspect or the second aspect, or any possible implementation manner of the third aspect or the third aspect, or any possible implementation manner of the fourth aspect or the fourth aspect, Either implement the fifth aspect or any possible implementation manner of the fifth aspect, or implement the functions involved in the sixth aspect or any possible implementation manner of the sixth aspect. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the access network device. The chip system may be composed of chips, or may include chips and other discrete devices.

A seventeenth aspect of an embodiment of the present application provides a communication system, where the communication system includes at least one communication device from the seventh aspect to the thirteenth aspect and any possible implementation manners thereof.

Wherein, for the technical effects brought by the seventh to seventeenth aspects or any of the possible implementations, please refer to the first aspect or the technical effects brought by different possible implementations of the first aspect, or, refer to the second aspect or the technical effects brought by different possible implementations of the second aspect, or refer to the third aspect or the technical effects brought by different possible implementations of the third aspect, or, refer to the fourth aspect or the different possible implementations of the fourth aspect For the technical effect brought by the implementation manner, or refer to the technical effect brought by the fifth aspect or different possible implementation manners of the fifth aspect, or refer to the sixth aspect or the technical effect brought by different possible implementation manners of the sixth aspect The technical effect will not be repeated here.

It can be seen from the above technical solutions that, in some embodiments provided in this application, in this method, the first device selects the sideline resources through a random selection method or a partial sensing method, and the partial sensing method is that the first device selects the side-line resource according to the sensing window. The resource occupancy information of part of the time unit in the selection resource; then, the first device sends the sideline control information SCI to the second device on the sideline resource, wherein the SCI includes first indication information, the first indication information It is used to indicate that the reservation status of the sideline resource is unreserved. Because the first device does not completely monitor the resource occupancy information of all time units in the sensing window during the process of selecting sideline resources through random selection or partial sensing, that is, when the first device does not monitor enough, the first device Send the SCI carrying the first indication information to the second device in the sidelink communication on the sidelink resource, where the first indication information is used to indicate that the reservation status of the sidelink resource is unreserved, so that the second device Determining that the sideline resource is an unreserved resource can prevent the first device and the second device from preempting the sideline resource. Therefore, the first device selects the sideline resource through random selection or partial sensing, which can save the first device power consumption, and avoid transmission collision caused by insufficient monitoring of the first device, and improve communication efficiency.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

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

3 is a schematic diagram of another communication system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a sidelink communication method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application;

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

FIG. 9 is a schematic diagram of another communication apparatus provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1. The terminal devices involved in this application include devices that provide users with voice, devices that provide users with data connectivity, and devices that provide users with voice and data connectivity. For example, it may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. It can also be referred to simply as a terminal. The terminal can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal may include user equipment (UE), wireless terminal, mobile terminal, device-to-device (D2D) terminal, vehicle-to-everything (V2X) terminal, roadside unit ( road side unit, RSU), machine-to-machine/machine-type communications (M2M/MTC) terminal, Internet of things (IoT) terminal, subscriber unit (subscriber unit), Subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent, or user device, etc. This may include mobile telephones (or "cellular" telephones), computers with mobile terminals, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like. It may include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants), PDA), etc. Also includes constrained devices, devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. Information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners can be included.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminals described above, if they are located on the vehicle, for example, placed in the vehicle or installed in the vehicle, can be regarded as on-board terminals, and the on-board terminal is also called an on-board unit (OBU).

In this embodiment of the present application, the device for implementing the function of the terminal may be the terminal, or may be a circuit capable of supporting the terminal to implement the function, for example, a circuit that may be applied to a chip system, and the chip system may be installed in the terminal. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the functions of the terminal as a terminal as an example.

2. The network devices involved in this application may include radio access network (radio access network, RAN) devices, such as base stations (eg, access points). It can refer to a device in the access network that communicates with a terminal device through an air interface, or a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU). The base station may be used to convert received air frames to and from IP packets, acting as a router between the terminal and the rest of the access network, which may include the IP network. The RSU may be a fixed infrastructure entity supporting V2X applications, exchanging messages with other entities supporting V2X applications. The network devices may also coordinate attribute management for the air interface. For example, the network equipment may include an evolved base station (evolutional Node B, NodeB or eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system or long term evolution-advanced (LTE-A), Alternatively, it may also include the next generation nodes in the evolved packet core (EPC), the fifth generation communication technology (5G), and the new radio (NR) system (also referred to as the NR system for short). B (next generation node B, gNB) or including a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in a cloud radio access network (Cloud RAN) system, implemented in this application Examples are not limited. The network equipment may also include core network equipment, and the core network equipment includes, for example, an access and mobility management function (access and mobility management function, AMF) and the like. For the RSU, it should be noted that it may be a network RSU or a terminal equipment RSU. When acting as a network class RSU, it performs the functions of a network class device; when acting as a terminal device class RSU, it executes the functions of a terminal device.

Wherein, the network device can send configuration information (for example, carried in a scheduling message and/or an instruction message) to the terminal device, and the terminal device further performs network configuration according to the configuration information, so that the network configuration between the network device and the terminal device is aligned; or , through the network configuration preset in the network device and the network configuration preset in the terminal device, the network configuration between the network device and the terminal device is aligned. Specifically, "alignment" refers to the determination of the carrier frequency for sending and receiving the interaction message, the determination of the type of the interaction message, the meaning of the field information carried in the interaction message, or the The understanding of other configurations of interactive messages is consistent.

In addition, in other possible cases, the network device may be other devices that provide wireless communication functions for the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For convenience of description, the embodiments of the present application are not limited.

The network equipment may also include core network equipment, and the core network equipment includes, for example, an AMF, a user plane function (user plane function, UPF), or a session management function (session management function, SMF), and the like.

In this embodiment of the present application, the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.

3. Sidelink (SL)

In V2X, end devices can communicate in two ways. The first way is to communicate between terminal devices through the Uu interface. The Uu interface refers to the wireless interface between the terminal device and the network device, and the communication between the terminal devices needs to be forwarded by nodes such as the network device. The second way is to perform sideline communication between terminal devices, that is, to perform direct communication between terminal devices without forwarding by network devices. At this time, the links directly connected to each other between terminal devices are called side links.

Generally, terminal devices in Sidelink technology can directly connect information through PC5 interfaces between each other. In this application, the side link can be expressed in English Sidelink, or it can be expressed in side link, both of which have the same meaning and are both the English expression of the side link in this application. This technology can not only provide information exchange within the coverage service range of network equipment, but also can carry out information exchange in places not covered by network equipment. Terminal equipment authorized for special communication can adopt Sidelink communication. Of course, Sidelink communication can be used to transmit service data of intelligent transportation, and can also be used to transmit mobile Internet services, which is not limited in this application.

4. Sidelink control information (SCI)

Sidelink control information includes sidechain scheduling information or necessary indication information for sideline transmission, such as indication information of time-frequency resource blocks used in transmission, modulation and coding scheme, source ID and target ID, etc. . In NR, sidelink control information for V2X is sent in two stages. The first stage SCI (the first stage SCI) is carried on the physical sidelink control channel (PSCCH) and contains information for sensing operations and information about PSSCH resource allocation. The first stage SCI can also be called the first stage SCI,

The second stage SCI is carried on the physical Sidelink shared channel (PSSCH), and the second stage SCI (the second stage SCI) carries the identification and/or decoding of the associated Sidelink shared channel (SL-SCH) The required information, as well as the indication information of the hybrid automatic repeat request (HARQ), and the trigger information of the channel state information (channel state information, CSI) feedback, etc. Stage 2 SCI may also be referred to as Stage 2 SCI.

5. Resource pool

In V2X, network devices can configure resource pools for SL communication of V2X terminal devices, and a resource pool is a collection of time-frequency resources. Two resource allocation modes are defined in V2X:

Mode 1 (mode 1): The network device schedules or configures Sidelink resources to the terminal device for Sidelink transmission;

Mode 2 (mode 2): Terminal equipment autonomous resource selection.

5-1. Mode 2 (mode 2)

The basic way is that the UE senses in a (pre)configured resource pool which resources are not used by other UEs, and selects an appropriate number of such resources for its own transmission. V2X supports resource sensing and selection or reselection process in mode 2. The sensing process can also be based on demodulating SCI information of other terminal devices or other Sidelink measurement results, and the demodulated SCI information reflects the resource usage on the Sidelink. . The resource selection or reselection process may decide resources for Sidelink transmission based on the above sensing process results.

6. Time slot (slot)

In an NR system, a time slot is the smallest scheduling unit of time. The time is divided into periodic frames, and each frame is divided into several time slots. No matter whether the frames or time slots are non-overlapping, each time slot is a basic unit of communication. The duration of the time slot is determined by the subcarrier spacing used for transmission. For example, for a 15 kHz subcarrier spacing, the duration of one slot may be 1 ms. For another example, the duration of one time slot interval for a subcarrier of 30 kHz may be 0.5 ms. For another example, for a subcarrier of 60 kHz, the duration of one time slot may be 0.25 ms. For another example, for a subcarrier of 120 kHz, the duration of one time slot may be 0.125 ms. Optionally, when a time slot is used as a basic scheduling unit, all symbols in a time slot may be used for transmission, or some symbols in a time slot may be used for transmission, which is not limited in the present invention. For example, the number of symbols in one slot may be 12 symbols or 14 symbols. In the 14-symbol example, the first symbol can be used to transmit and receive converted symbols, and only 13 symbols are used for sideline transmission.

7. Channel busy ratio (CBR)

CBR may be defined as: taking the definition or description of CBR on a resource pool as an example, among all subchannels in a resource pool, the ratio of the number of unavailable subchannels to the number of all subchannels. Wherein, the unavailable sub-channel can be determined in the following manner: the terminal device measures the sub-channel, and the measured value exceeds the configured or pre-configured preset threshold, indicating that the sub-channel is unavailable, and the measured value is lower than the preset threshold, then Indicates that the subchannel is available. The above-mentioned measurement value is, for example, a value of a received signal strength indicator (received signal strength indicator, RSSI) or a reference signal received power (reference signal received power, RSRP).

For example, if the measured RSRP or RSSI on a subchannel is higher than a preset threshold, it indicates that the subchannel is unavailable, and if the RSRP or RSSI of a subchannel is lower than the preset threshold, it indicates that the subchannel is available. The larger the value of CBR, the more crowded the resource pool, and the lower the reliability of transmission. The smaller the value of CBR, the more idle the resource pool, and the higher the reliability of transmission.

8. Business priorities

The service priority refers to the priority of the service to be transmitted, and the value of this priority can be determined by the service quality requirements of the service. The requirements for quality of service include: one or more of delay requirements, communication distance requirements, reliability requirements, and rate requirements. The higher the business priority, the more important the business is. Business priority can be reflected by the priority of logical information. In the sending message indicating the service data packet, the signaling in the SCI can be used to indicate the priority of the service. The smaller the value of the signaling of the priority indicated by the SCI is, the higher the priority of the service is. For example, when the priority indicated in the SCI is 1 (or 0), the priority of the corresponding service data is the highest; when the priority indicated in the SCI is 8 (or 7), the priority of the corresponding service data is the lowest.

9. The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: LTE system, worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system, Such as NR, and future communication systems such as 6G systems.

10. Configuration and pre-configuration

In the present invention, both configuration and pre-configuration are used. Configuration means that the base station or server sends configuration information or parameter values of some parameters to the terminal through messages or signaling, so that the terminal can determine communication parameters or resources during transmission according to these values or information. Pre-configuration is similar to configuration. It can be the way that the base station or server sends parameter information or values to the terminal through another link or carrier different from the sideline; it can also be to define the corresponding parameters or parameter values, or By writing the relevant parameters or values to the terminal device in advance. The present invention does not limit this. Further, these values and parameters can be changed or updated.

11. The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or importance of multiple objects degree.

The present application can be applied to a long term evolution (long term evolution, LTE) system, a new radio (new radio, NR) system, or other communication systems, wherein the communication system includes network equipment and terminal equipment, and the network equipment is used as a configuration The information sending entity, and the terminal device acts as the configuration information receiving entity. Specifically, an entity in the communication system sends configuration information to another entity, and sends data to another entity, or receives data sent by another entity; another entity receives the configuration information, and sends the configuration information to the configuration information according to the configuration information. The entity sends data, or receives data sent by the configuration information sending entity. Wherein, the present application can be applied to a terminal device in a connected state or an active state (active), and can also be applied to a terminal device in an inactive state (inactive) or an idle state (idle).

1 is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in the figure, the configuration information sending entity may be a network device, wherein the network device is described by taking a base station as an example, and the configuration information receiving entity may be For UE1-UE6, at this time, the base station and UE1-UE6 form a communication system. In this communication system, UE1-UE6 can send uplink data to network equipment, and the network equipment needs to receive the uplink data sent by UE1-UE6. At the same time, the network device may send configuration information to UE1-UE6. For example, in a cellular link (cellular link), the transmitting device may be a base station and the receiving device may be a terminal; or, the transmitting device may be a terminal and the receiving device may be a base station.

FIG. 2 is a schematic diagram of another communication system provided by an embodiment of the present application. Further, as shown in the figure, in a sidelink (sidelink, SL), generally speaking, the transmitting device and the receiving device may be of the same type The user equipment or network equipment of the device can also be a roadside unit (RSU) and a user terminal, where the RSU is a roadside station or a roadside unit from a physical point of view, and a terminal from a functional point of view. The device may also be a network device, which is not limited in this application. That is, the transmitting device is a user terminal, and the receiving device is also a user terminal; or, the transmitting device is a roadside station, and the receiving device is also a user terminal; or, the transmitting device is a user terminal, and the receiving device is also a roadside station. In addition, the sidelink may also be the same type or different types of base station equipment, and the function of the sidelink at this time is similar to that of the relay link, but the air interface technology used may be the same or different.

Exemplarily, a terminal device can communicate with another terminal device through the transfer of the network device, or can directly communicate with another terminal device without going through the network device. When a terminal device directly communicates with another terminal device without going through the network device , the communication link between the two terminal devices may be referred to as a sidelink or a straight-through link.

In the sidelink communication of the terminal device, specifically the single configuration of the network device determines the single resource selection method that the terminal device is allowed to use on the sidelink SL. For example, when the terminal device and the network device are configured by default, the terminal device can be implemented. There are three types of resource selection methods, namely full sensing method, random selection method, partial sensing method, etc. The network device can configure an index value corresponding to these three resource selection methods to the specified For example, the above three resource selection modes are identified by means of ABC, XYZ, 123, etc., respectively, and then the terminal device uses the resource selection mode corresponding to the index value to select sideline resources on the SL.

The random selection method may be that the terminal device randomly selects resources with a certain probability in the resource selection window. The partial sensing mode may be that the terminal device selects resources according to the resource occupation information of partially continuous or discontinuous time units in the sensing window. The complete sensing mode may be that the terminal device selects resources according to the resource occupation information of all time units that can be detected in the sensing window. Optionally, "capable of detection" here refers to detection in all time units except for the time units that cannot be detected by the terminal device due to some special restrictions. These special limitations include: Because of the half-duplex limitation, the terminal equipment cannot perform reception detection on the time unit in which it is transmitting. For another example, these special limitations include: when multi-carrier operation is supported, due to the limitation of the terminal radio frequency, when the terminal device transmits on one carrier, it causes different reception and detection on the same time unit on another carrier.

It should be noted that, in this embodiment of the present application, the time unit may specifically indicate a radio frame, a subframe, a time slot, a symbol, or other time units, etc., which is not specifically limited here.

In addition, during the sidelink communication process, sidelink resources may be reserved for data to be transmitted by a certain terminal device (for example, the data to be transmitted is a retransmission service, periodic service, etc.). When other terminal devices select sideline resources through the resource selection method of full sensing, they can obtain all detectable sideline resource information in the sensing window. When it is determined that the sidelink resource information includes the reservation information of the reserved sidelink resource, other terminal devices use other sidelink resources different from the reserved sidelink resource to transmit data to avoid transmission collision.

In the above implementation solution, there are at least the following technical problems:

Question 1. The above-mentioned fully-aware resource selection method has high complexity and will increase the power consumption of the terminal device. In other resource selection methods that can reduce the terminal power consumption, how to solve the transmission collision of reserved sideline resources is a problem. Problems to be solved;

Problem 2. During the above-mentioned process of determining the resource selection mode by the terminal device, the terminal device can only determine a single resource selection mode according to a single configuration of the network device. However, the resource selection method indicated by the network device is not necessarily suitable for the current network environment of the terminal device. For example, the network device may configure the terminal device with a fully aware resource selection method based on the problem of reducing transmission collisions. At this time, the power consumption of the terminal device is likely to be too high, and the utilization rate of the channel is greatly reduced. Therefore, how to make the terminal device use a resource selection method adapted to the terminal device on the SL is also an urgent problem to be solved.

Problem 3. During the SL communication process, the terminal device can only determine which resource selection method to use to determine the sideline resource according to the instruction of the network device. The communication situation of other terminal devices cannot be sensed. If the network device needs to obtain the communication situation that may affect each other between multiple terminal devices at the same time, it is also a great challenge to the performance and power consumption of the network device. Therefore, how to make the terminal device use data transmission resources adapted to the terminal device on the SL is also an urgent problem to be solved.

In order to solve the above problem, the embodiments of the present application provide various solutions, which can be implemented from different perspectives of solving the problem, which will be introduced in detail below.

FIG. 4 is a schematic diagram of a sidelink communication method provided by an embodiment of the present application. As shown in the figure, the sidelink communication method includes the following steps.

S101. The first device selects a sideline resource in a random selection manner or a partial sensing manner.

In this embodiment, the first device selects sideline resources in a random selection manner or a partial sensing manner, where the partial sensing manner is that the first device selects resources according to resource occupation information of a partial time unit in a sensing window.

In a possible implementation manner, in step S101 , the first device selects the sideline resource in a random selection manner or a partial sensing manner. The process may specifically include that the first device selects a sideline resource from a first resource pool in a random selection manner or a partial sensing manner, wherein the first resource pool may be determined according to a configuration and/or a pre-configured manner from the network device. . The first resource pool includes a plurality of sideline resources used for SL communication, and the first resource pool may be a resource pool multiplexed with a full-sensing mode and a partial-sensing mode, or the first resource pool may be a full-sensing mode and a A resource pool that is reused by random selection. The solution can be applied to a variety of different network environments, and the flexibility of solution implementation is improved.

The random selection method may be that the first device randomly selects resources with a certain probability in the resource selection window. The partial sensing mode may be that the first device selects the resource according to the resource occupation information of the partial time unit in the sensing window. The full sensing mode may be that the first device selects resources according to resource occupation information of all time units that can be detected in the sensing window. It should be noted that, in this embodiment and subsequent embodiments, the time unit may specifically indicate a radio frame, subframe, time slot, symbol, or other time unit, etc., which is not specifically limited here.

Optionally, reservation of data packet transmission between cycles is activated or enabled on the first resource pool. Wherein, the first resource pool may indicate activation or enable the reservation of data packet transmission between cycles in various ways. For example, when the sideline resource is used to transmit the first data packet, the reservation may indicate the first data packet The second data packet is reserved in the first period, and the reservation can also indicate the retransmission of the first data packet in different periods to be reserved, and the reservation can also indicate the transmission of the first data packet in other ways Make a reservation, which is not limited here.

Before step S101, the first device may pre-determine a resource selection manner in which the first device selects sideline resources. Specifically, when the first parameter satisfies the preset condition, the first device determines that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode, where the first parameter includes at least one of the following: channel Quality information and business service quality information. The channel quality information includes one or more of the following: channel occupancy ratio (CR), channel busy ratio (CBR), reference signal received power (RSRP), Received signal strength indicator (RSSI). The service quality information includes one or more of the following: the priority of the SL's transmission data, the delay requirement of the SL's transmission data, the communication distance requirement of the SL's transmission data, and the transmission reliability requirement of the SL's transmission data. Optionally, the preset condition or parameters in the preset condition may be configured or preconfigured. That is, when the first parameter satisfies the preset condition, the first device determines that the resource selection mode in the sidelink is the random selection mode or the partial sensing mode. Compared with the first device that can only determine a single resource selection mode according to a single configuration of the network device, the first device can more flexibly determine the resource selection mode in the SL according to the first parameter, so as to adapt to different scenarios and further improve communication. efficient.

Optionally, the resource selection method is random selection, and the above-mentioned CR, CBR, RSRP, RSSI, etc., which describe the channel quality information, are measured on the resource pool. It may also be obtained from a message sent by a network device, or obtained from a message sent by other user equipment.

Optionally, the resource selection method is a partial perceptual selection, and the above-mentioned CR, CBR, RSRP, RSSI, etc., which describe the channel quality information, are measured on the resource pool. It can also be obtained from a message sent by a network device, or obtained from a message sent by other user equipment, or obtained by detection in all or part of the time unit used for partial sensing.

For the various implementations of the first parameter, it can be roughly divided into two categories according to the different parameters indicated by the first parameter, including:

1. The service attribute of the transmission data not related to the SL.

Wherein, the first parameter includes channel quality information, that is, any one or more of CR, CBR, RSRP, and RSSI.

When CR is less than the threshold corresponding to CR, or CBR is less than the threshold corresponding to CBR, or RSRP is less than the threshold corresponding to RSRP, or RSSI is less than the threshold corresponding to RSSI, the first device can determine that the current channel is relatively idle. That is, the probability of transmission collision is small. In order to reduce the terminal power consumption of the first device, at this time, it may be determined that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode. On the contrary, the first device may use other resource selection manners, such as a complete perception manner or other resource selection manners, which are not limited here.

Optionally, the above-mentioned thresholds corresponding to CR, CBR, RSRP, RSSI, etc. describing the channel quality information are configured or pre-configured.

Exemplarily, taking the first parameter including CR as an example, the first device may detect the CR on the first resource pool on the first resource pool, and at this time, the first device may obtain the first threshold associated with the CR, wherein , the first threshold may be determined in a pre-configured manner, or determined by the first device receiving a configuration from a network device. Thereafter, when the CR is lower than the first threshold, the first device determines that the first parameter satisfies the preset condition, that is, determines that the resource selection mode used in step S101 is a random selection mode or a partial sensing mode. Similarly, the situation where the first device determines that the first parameter satisfies the preset condition may also include any one or more of the following: the CBR is less than the threshold associated with the CBR, the RSRP is less than the threshold associated with the RSRP, and the RSSI is less than the threshold associated with the RSRP. Threshold for this RSSI.

2. The service attribute of the transmission data associated with the SL.

The first parameter includes service quality information, that is, the priority of the SL's transmission data, the SL's transmission data delay requirements, the SL's transmission data communication distance requirements, and the SL's transmission data transmission reliability requirements. The first device determines that the priority of the transmission data of the SL is lower than the corresponding priority threshold, or the delay requirement of the transmission data of the SL is lower than the corresponding delay requirement threshold, or the communication distance requirement of the transmission data of the SL is higher than that of the corresponding communication The distance requirement threshold, or the transmission reliability requirement of the transmission data of the SL is lower than the corresponding reliability requirement threshold, and the first device determines that the transmission failure of part of the transmission data of the SL can be tolerated. In order to reduce the terminal power consumption of the first device, at this time, it may be determined that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode. On the contrary, the first device may use other resource selection manners, such as a complete perception manner or other resource selection manners, which are not limited here.

Optionally, the threshold values corresponding to the service attribute parameters (such as priority, delay requirement, communication distance, reliability requirement) of the above-described transmission data are configured or pre-configured.

Exemplarily, taking the first parameter including the priority of the transmission data of the SL as an example, the first parameter includes the priority of the transmission data of the SL, the first device may determine the priority of the transmission data of the SL that needs to be transmitted on the sideline resource. class.

Wherein, the higher the priority of the transmission data of the SL, the smaller the value of the priority indication information indicated in the SCI.

Optionally, the SCI has 3 bits to indicate the priority of the service, and the values of these priorities are 1 to 8 or 0 to 7.

Optionally, the smaller the value indicated by the SCI priority field, the higher the priority of the service; the larger the value indicated by the SCI priority field, the lower the priority of the service.

Optionally, the priority indicated in the SCI may be the priority of the logical channel in the data channel, or the one with the smallest priority or the one with the largest priority among the multiple logical channels included in the data channel.

At this time, the first device may acquire a second threshold associated with the priority, where the second threshold may be determined in a pre-configured manner, or determined by the first device receiving a configuration from a network device. When the priority of the transmission data of the SL is higher than the second threshold, the first device determines that the first parameter satisfies the preset condition, that is, determines that the resource selection mode used in step S101 is a random selection mode or a partial sensing mode . Similarly, the situation where the first device determines that the first parameter satisfies the preset condition may also include any one or more of the following: the delay requirement of the SL transmission data is lower than the corresponding delay requirement threshold, the communication of the SL transmission data The distance requirement is higher than the corresponding communication distance requirement threshold, and the transmission reliability requirement of the transmission data of the SL is higher than the corresponding reliability requirement threshold. When these conditions are met, it indicates that the sideline data to be sent is a higher priority, more important or urgent service. Using random selection or partial sensing for these services can reduce the time delay and power consumption when these services are transmitted.

In addition, before step S101, the method may further include: the first device first obtains second indication information, where the second indication information is used to indicate at least two resource selection modes; when the first parameter satisfies a preset condition, the first A device determines that the resource selection mode of the SL is a random selection mode or a partial sensing mode. The implementation process includes: when the first parameter satisfies a preset condition, the first device determines, among the at least two resource selection modes, that the resource selection mode of the SL is a random selection mode or a partial sensing mode. Wherein, the at least two resource selection methods include at least two of the following methods:

random selection;

part of perception;

Totally perceptual way.

Or, wherein, the at least two resource selection manners include at least two of the following manners:

Totally perceptual way.

The enabling or disabling of resource reservation between different transport blocks means that the reservation status of the sideline resource determined by the corresponding resource selection method is reserved or unreserved. Specifically, the unreserved may indicate that the resource after the time unit where the sideline resource is located is not reserved, and the reservation may indicate the reservation of at least one resource after the time unit where the sideline resource is located. Therefore, the first device may acquire the second indication information for indicating at least two resource selection modes before step S101, and when the first parameter satisfies the preset condition, the first device is in the at least two resource selection modes In the process of determining how SL's resources are selected. Compared with the fact that the first device can only determine a single resource selection mode according to a single configuration of the network device, a more flexible resource selection mode can be provided for the first device. Therefore, the aforementioned problem 2 is solved, that is, the terminal device (ie the first device) can determine the resource selection mode of the first device according to at least two resource selection modes, so as to use the resource selection mode adapted to the terminal device on the SL .

In addition, based on the implementation process of the first parameter, the first device may further determine, according to the first parameter, that the reservation status of the sidelink resource is unreserved or reserved in step S101. Optionally, the reservation includes intra-period reservation or inter-period reservation. That is, when the first parameter satisfies the preset condition, the first device determines that the resource selection method in the sidelink is a random selection method or a partial sensing method, and the first device can further determine the sidelink according to the first parameter. The reservation status of the resource is unreserved or reserved, that is, it is determined whether to reserve or periodically reserve the sideline resource.

For example, if CR is less than the threshold corresponding to CR, or CBR is less than the threshold corresponding to CBR, or RSRP is less than the threshold corresponding to RSRP, or RSSI is less than the threshold corresponding to RSSI, the first device can determine that the current channel is relatively idle, and at this time, the first device according to the first parameter It is determined that the reservation status of the sideline resource is reserved. In addition, for the process that the first device determines that the reservation status of the sideline resource is unreserved or reserved according to the first parameter, reference may also be made to the implementation manner in the foregoing embodiment, which will not be repeated here. This implementation can determine whether to reserve subsequent resources when sending the SCI according to the value of the first parameter, and can make decisions based on different services or channel conditions, thereby reducing the blindness of whether to reserve or not. , in order to better match the needs of the service and the state of the channel, thereby improving the performance of the system.

In a possible implementation manner, in the implementation process of step S101, the first device may determine according to the configuration and/or pre-configuration from the network device, and determine that the reservation status of the lateral resource is unreserved or reserved.

In a possible implementation manner, in step S101, before the first device selects the sideline resource through random selection or partial sensing, the method further includes: the first device acquires fifth indication information, the fifth indication information The resource selection mode used to indicate the first device is random resource or partial sensing, and the fifth indication information is configured and/or pre-configured from the network device. Therefore, the first device may determine the resource selection manner of the first device according to the configuration and/or pre-configured fifth indication information from the network device.

S102. The first device sends the sideline control information SCI to the second device on the sideline resource.

In this embodiment, the first device sends the sideline control information SCI to the second device on the sideline resource. Correspondingly, in step S102, the second device receives the SCI from the first device; wherein the SCI includes First indication information, where the first indication information is used to indicate that the reservation status of the sideline resource is unreserved.

In a possible implementation manner, the reservation status of the sideline resource may specifically include the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved, and the reserved It is used to indicate the reservation of at least one resource after the time unit where the SCI is located. That is to say, the reservation status of the sideline resource indicated by the first indication information carried in the SCI is unreserved or reserved, and multiple implementations of the reservation status are provided, so that the first device can The second device indicates various reservation states of the sideline resource.

Optionally, in step S101, after the first device performs a process of selecting sideline resources in a random selection mode or a partial sensing mode on the resource pool in which the periodic reservation is activated or enabled, in step S102, the first device passes the first indication information. Indicates that the reservation status of the sideline resource is unreserved, so that the second device determines that the sideline resource is an unreserved resource, which can prevent the first device and the second device from preempting the sideline resource, thereby reducing the need for complete The interference between the sensing resource selection UEs improves the performance of the system.

In addition, when the reservation status of the sideline resource is reserved, the reservation of at least one resource after the time unit where the SCI is located is indicated. The reservation of the at least one resource includes the reservation of a first data packet resource and/or the reservation of a second data packet resource, wherein the second data packet may be other data associated with the first data packet packet, for example, the second data packet may be a retransmission data packet of the first data packet, or the second data packet may also be a service data packet different from the first data packet, or the second data packet It can also be other data packets, which is not limited in this application.

Specifically, the first indication information in the SCI is used to indicate that the reservation status of the sideline resource is reserved, that is, when indicating the reservation of at least one resource after the time unit where the SCI is located, wherein the sideline resource is used for transmission first packet. The first data packet may be used to transmit periodic services, the reservation of the at least one resource may indicate the reservation of the resource of the first data packet in different periods, and/or the at least one resource may also indicate the same period , the reservation of the retransmission data packet of the first data packet, that is, the reservation of the resource of the first data packet. In addition, the at least one resource may also indicate reservation of the second data by the first data packet during different periods, where the second data packet may be a retransmission data packet of the first data packet, or the first data packet may be a retransmission data packet of the first data packet. The second data packet may also be a different service data packet from the first data packet, or, the second data packet may also be another data packet associated with the first data packet, which is not limited in this application.

Exemplarily, the reservation of at least one resource may indicate the reservation of retransmission resources of the same data packet, and may also indicate the reservation of this periodic data packet between different periods. For example, the sideline resource is used to transmit the first data packet, taking the transport block (TB) 1 in another communication system provided in FIG. 3 as the first data packet as an example. The currently transmitted data is the transport block TB1. During sidelink communication, TB1 needs to be retransmitted multiple times. The terminal can reserve sidelink resources corresponding to multiple retransmissions of TB1 for the TB1 in the current period (T1). TB1 is used to carry periodic services or there are new and different data packets to be transmitted in the future. The terminal can also reserve the sideline resources corresponding to TB2 in the next period (T2) for this TB1, and can further reserve the corresponding resources of TB2. The sideline resources corresponding to the initial transmission and multiple retransmissions. Optionally, the period sizes of T1 and T2 are the same.

In a possible implementation manner, the first indication information may be a reserved bit field and/or a resource reservation period field in the SCI. That is to say, the first indication information may be carried by a designated field in the SCI, that is, the first indication information may be carried by a reserved bit field and/or a resource reservation period field in the SCI.

The first indication information may use a special value or a reserved state in the period field in the SCI, such as a value of 0, a value greater than 99, or a value greater than 1000 or a reserved state (such as radio resource control (radio resource control). , the value not configured in RRC)) to indicate. That is, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool. Specifically, the first resource pool may be determined according to the configuration and/or pre-configuration from the network device, the first resource pool includes a plurality of sideline resources for SL communication, and the first indication information is resource pre-configuration Reservation period field, the period value corresponding to the reservation status in the resource reservation period field does not belong to the period value configured in the first resource pool, so as to indicate that the reservation status of the sideline resource is unreserved.

Optionally, one or more bits may be used in the SCI to indicate the reservation status of the currently selected sideline resource for the next cycle, where the signaling of the one-bit or more-bit SCI may be the one in the first-level SCI. reserved bits or fields to indicate.

In a possible implementation manner, the reservation status in the period field in the first-level SCI is used to indicate that no resource reservation is made. The reservation status of the period field in this SCI can be any one or more of the following values:

[Nr,Nr+1,...,ceil(log2(Nr))-1], or,

[Nr,Nr+1,...,M-1].

Among them, Nr is the number of cycles configured in the first resource pool, which is a positive integer, ceil means rounding up, log2 means taking the logarithm with the base 2, "[" and "]" are used to indicate that the list of multiple values. M is a value corresponding to the number of bits used to indicate the reserved state. For example, if 2 bits, M=4, 3 bits, M=8, and 4 bits, M=16. At this time, it indicates that the reservation status of the sideline resource is reserved. For example, if Nr=10, the value is any one of 10, 11, 12, . . . , 15, indicating that the resource is not reserved.

In another possible implementation manner, the reserved status of the sideline resources includes the status value of the time domain resource and/or the status value of the frequency domain resource in the SCI, and the status value of the time domain resource and/or the status value of the frequency domain resource. The status value of the domain resource is: 0 or a value other than the preset value, and the reservation status of the sideline resource is unreserved.

In a possible implementation manner, in step S102, the SCI sent by the first device to the second device may also carry third indication information for indicating the resource selection mode of the first device, so that the second device The device can determine the data transmission resources of the second device according to the resource selection method of the first device, thereby solving the aforementioned problem 3, reducing the transmission collision between the second device and the first device to a certain extent, and further improving the communication efficient.

In a possible implementation manner, when the first priority is higher than the second priority, the first device preempts the reserved resources indicated by the sideline control information from the second device, where the first priority is used In order to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information from the second device priority. Optionally, the resource selection mode of the second device is a fully aware mode.

Therefore, high-priority services can be transmitted using reserved resources corresponding to other low-priority services, and the success rate of data transmission corresponding to higher-priority services is improved.

Further, the first device may preempt the reserved resources indicated by the sideline control information from the second device only when a preset condition is met, wherein the preset condition includes the detected signal quality of the first device Below the first threshold and/or the first priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

In this embodiment, the first device selects sideline resources through random selection or partial sensing, where the first device selects resources according to resource occupancy information of partial time units in the sensing window. Then, the first device sends the sideline control information SCI to the second device on the sideline resource, where the SCI includes first indication information, and the first indication information is used to indicate that the reservation status of the sideline resource is: Not reserved. Because the first device does not completely monitor the resource occupancy information of all time units in the sensing window during the process of selecting the sideline resources in a random selection manner or a partial sensing manner. That is, in the case of insufficient monitoring by the first device, the first device sends the SCI carrying the first indication information to the second device in the sidelink communication on the sidelink resource, and the first indication information is used to indicate the sidelink. The reservation state of the resource is unreserved, so that the second device determines that the lateral resource is an unreserved resource, which can prevent the first device and the second device from preempting the lateral resource. Therefore, the aforementioned problem 1 is solved, that is, the first device selects the sideline resources by random selection or partial sensing, which can save the power consumption of the first device, and avoid transmission collisions caused by insufficient monitoring by the first device, thereby improving communication efficiency. .

FIG. 5 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application. As shown in the figure, the sidelink communication method includes the following steps.

S201. The first device determines the resource selection mode of the sidelink SL according to the first parameter.

In this embodiment, in step S201, the first device determines a resource selection mode for communication on the SL according to the first parameter.

In a possible implementation manner, the first parameter includes at least one of the following: channel quality information and/or service quality of service information. At this time, in step S201, the basis for the first device to determine the resource selection mode in the sidelink is a first parameter, where the first parameter may specifically be used to indicate the channel quality of the communication channel, and/or, The service attribute of the data to be transmitted by the first device on the SL. Therefore, the resource selection mode determined by the first device according to the first parameter can be adapted to the current communication channel and/or the data to be transmitted. While providing the specific implementation mode of the first parameter, the first device can be Adapt to different scenarios or different network environments.

1. The first parameter includes channel quality information.

Wherein, the first parameter includes channel quality information, that is, any one or more of CR, CBR, RSRP, and RSSI;

If CR is less than the threshold corresponding to CR, or CBR is less than the threshold corresponding to CBR, the first device can determine that the current channel is relatively idle, that is, the probability of transmission collision is small. In order to reduce the terminal power consumption of the first device, it can determine the side link The resource selection mode of SL is random selection mode or partial sensing mode. Alternatively, the first device may determine that when the current channel is relatively busy, that is, the probability of transmission collision is high, in order to avoid transmission collision, it may determine that the resource selection mode of the sidelink SL is the full sensing mode at this time.

If the RSRP is less than the threshold corresponding to RSRP or the RSSI is less than the threshold corresponding to RSSI, the first device can determine that the current channel is relatively idle, that is, the probability of transmission collision is small. In order to reduce the terminal power consumption of the first device, the sidelink SL can be determined at this time. The resource selection method is random selection method or partial perception method. Alternatively, the first device may determine that when the current channel is relatively busy, that is, the probability of transmission collision is high, in order to avoid transmission collision, it may determine that the resource selection mode of the sidelink SL is the full sensing mode at this time.

Exemplarily, taking the first parameter including the CR as an example, for example, the first device may detect the CR on the first resource pool on the first resource pool. At this time, the first device may acquire a first threshold associated with the CR, where the first threshold may be determined in a pre-configured manner, or determined by the first device receiving a configuration from a network device. Thereafter, when the CR is lower than the first threshold, the first device determines that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode; or, the first device determines the resource selection mode of the sidelink SL for full perception. Wherein, when the first parameter includes CBR, RSRP or RSSI, the first device may also refer to the implementation manner of CR, which will not be repeated here.

Optionally, the thresholds corresponding to the channel quality information in the following three situations may be the same or different, which is not limited in the present invention: the first device switches from random resource selection to the full sensing mode; the first device switches from random resource selection to the full sensing mode; Select to switch to the partially aware resource selection mode; the first device switches from the partially aware resource selection to the fully aware mode.

2. The first parameter includes the service attribute of the transmission data of the SL.

The first parameter includes service quality information, that is, the priority of the SL's transmission data, the SL's transmission data delay requirements, the SL's transmission data communication distance requirements, and the SL's transmission data transmission reliability requirements. one or more. The data that the first device needs to transmit on the sideline resource is the transmission data of the SL. When the first device determines that the priority of the transmission data of the SL is lower than the corresponding priority threshold, or the delay requirement of the transmission data of the SL is low When the corresponding delay requirement threshold, or the communication distance requirement of the SL's transmission data is higher than the corresponding communication distance requirement threshold, or when the transmission reliability requirement of the SL's transmission data is lower than the corresponding reliability requirement threshold, the first device It is determined that the transmission failure of the transmission data of the partial SL can be tolerated. In order to reduce the terminal power consumption of the first device, at this time, it may be determined that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode. Or, the first device determines that the transmission failure of the transmission data of the partial SL cannot be tolerated. In order to increase the transmission success rate of the transmission data of the SL, the resource selection mode of the sidelink SL may be determined to be a full sensing mode or a partial sensing mode at this time.

Optionally, the thresholds for priorities in the following situations may be the same or different: the first device switches from random resource selection to a fully aware mode; the first device switches from random resource selection to a partially aware resource selection mode; the first The device switches from partially aware resource selection to fully aware mode.

Exemplarily, taking the first parameter including the priority of the transmission data of the SL as an example, the first device may determine the priority of the transmission data of the SL that needs to be transmitted on the sideline resource.

At this time, the first device may acquire a second threshold associated with the priority, where the second threshold may be determined in a pre-configured manner, or determined by the first device receiving a configuration from a network device. Thereafter, when the priority of the transmission data of the SL is lower than the second threshold, the first device determines that the first parameter satisfies the preset condition, that is, determines that the resource selection mode used in step S201 is a random selection mode or a partial selection mode way of perception. Or, the first device determines that the first parameter does not meet the preset condition, and determines that the resource selection mode used in step S201 is the full perception mode. Similarly, when the first parameter includes the time delay requirement of SL's transmission data, the communication distance requirement of SL's transmission data, or the transmission reliability requirement of SL's transmission data, the first device can also refer to the implementation of CR, here No longer.

In a possible implementation manner, the first device determines the resource selection manner according to the preconfigured configuration information, including at least one of the following:

Totally perceptual way.

Or, the first device determines, according to the preconfigured configuration information, that the resource selection manner includes at least one of the following:

random selection;

part of perception;

full perception;

The enabling or disabling of resource reservation between different transport blocks refers to that the reservation status of the sideline resource determined by the corresponding resource selection method is reserved or unreserved. Specifically, The unreserved may indicate that the resource after the time unit where the sideline resource is located is not reserved, and the reservation may indicate the reservation of at least one resource after the time unit where the sideline resource is located.

Therefore, the first device may, in step S201, in the process of determining the resource selection mode of the SL among the above-mentioned multiple resource selection modes, the first device and the first device can only determine a single resource selection according to a single configuration of the network device. Compared with the method, a more flexible resource selection method can be provided for the first device. Therefore, the aforementioned problem 2 is solved, that is, the terminal device (ie, the first device) can determine the resource selection mode of the first device according to multiple resource selection modes, so as to use the resource selection mode adapted to the terminal device on the SL.

In another possible implementation manner, before step S201, the method further includes: acquiring, by the first device, second indication information, where the second indication information is used to indicate that the resource selection manner includes at least two resource selection manners, The at least two resource selection methods include:

Totally perceptual way.

Or, the at least two resource selection methods include:

random selection;

part of perception;

full perception;

At this time, the first device may acquire second indication information for indicating that the resource selection mode includes at least two resource selection modes, and the first device determines the resource selection mode of the SL in the process of determining the resource selection mode of the SL among the at least two resource selection modes , compared with that the first device can only determine a single resource selection mode according to a single configuration of the network device, a more flexible resource selection mode can be provided for the first device.

In a possible implementation manner, in step S201, the first device may determine different resource selection manners of the sidelink SL according to the difference of the first parameter, which specifically includes:

1. The measured value of the channel quality information is smaller than the first threshold value, or, the service attribute of the transmission data of the SL satisfies a preset condition, and the resource selection mode of the sidelink is resource reservation between different transmission blocks Random selection of enabled; or partial awareness of resource reservation enabled between different transport blocks.

Specifically, in the above at least two resource selection methods, when the measured value of the channel quality information is less than the first threshold, that is, when the first device determines that the current channel is relatively idle, the first device can determine the sideline The resource selection mode of the link is a random selection mode of enabling resource reservation between different transport blocks, or a partial sensing mode of enabling resource reservation between different transport blocks. Or, when the service attribute of the transmission data of the SL meets a preset condition, that is, the first device determines that the current channel is relatively idle or that the service attribute of the transmission data of the SL has a higher priority/lower latency requirement/lower communication distance requirement/ When the transmission reliability requirement is low, it can be determined that the resource selection mode of the sidelink is a random selection mode of enabling resource reservation between different transport blocks, or a mode of enabling resource reservation between different transport blocks. part of perception.

Therefore, compared with other resource selection methods, while reducing the power consumption of the first device, channel utilization can be improved by enabling resource reservation between different transport blocks.

2. The measured value of the channel quality information is greater than the second threshold value, and/or, the service attribute of the transmission data of the SL does not meet the preset condition, and the resource selection method of the sidelink includes at least two of the following methods A kind of:

Totally perceptual way.

Specifically, in the above at least two resource selection methods, when the measured value of the channel quality information is greater than the second threshold, that is, when the first device determines that the current channel is busy, the first device can determine the sideline The resource selection mode of the link is a random selection mode in which the resource reservation between different transport blocks is turned off, or a partial sensing mode or a complete sensing mode in which the resource reservation between different transport blocks is turned off. Or, when the service attribute of the transmission data of the SL does not meet the preset condition, that is, the first device determines that the current channel is relatively busy or the service attribute of the transmission data of the SL has a lower priority/higher delay requirement/higher communication distance requirement / When the transmission reliability requirement is high, it can be determined that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or the part where the resource reservation between different transport blocks is turned off Perceived way, or fully sensed way. Compared with other resource selection methods, the channel utilization can be improved by enabling resource reservation between different transport blocks while reducing the power consumption of the first device.

In addition, the first threshold value and/or the second threshold value may be specifically associated with the priority indication information in the sideline control information SCI sent and/or received by the first device.

Specifically, the first threshold value may be associated with the priority indication information in the sideline control information SCI sent and/or received by the first device, so that the information in the SCI sent and/or received by the first device The priority indication information determines the first threshold value, and provides a specific implementation manner of the first threshold value. Alternatively, the second threshold value may be associated with the priority indication information in the sideline control information SCI sent and/or received by the first device, so that the priority in the SCI sent and/or received by the first device The second threshold value is determined by the level indication information.

In a possible implementation manner, the numerical value of the priority indication information in the sideline control information sent and/or received by the first device is negatively correlated with the size of the first threshold value.

Specifically, when the value of the priority indication information in the sideline control information SCI sent by the first device is larger, the priority indicated by the SCI is lower, and a smaller first threshold value is used. Wherein, a smaller first threshold value may make the first device more likely to determine that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or , a partial perceptual mode in which resource reservations between different transport blocks are turned off, or a fully perceptual mode, thereby reducing transmission collisions.

Alternatively, the smaller the value of the priority indication information in the sideline control information SCI sent by the first device is, the higher the priority indicated by the SCI is, and a larger first threshold value is used. Wherein, a larger first threshold value can make the first device more likely to determine that the resource selection mode of the sidelink is a random selection mode of resource reservation enablement between different transport blocks, Or the possibility of a partially perceptual manner in which resource reservation between different transport blocks is enabled, thereby improving the success rate of data transmission.

Similarly, the magnitude of the priority indication information in the sideline control information sent by the first device is positively correlated with the magnitude of the second threshold value.

Specifically, when the value of the priority indication information in the sideline control information SCI sent by the first device is larger, the priority indicated by the SCI is lower, and a larger second threshold value is used. Wherein, a larger second threshold value can make the first device have a greater possibility to determine that the resource selection mode of the sidelink is a random selection mode of resource reservation enablement between different transport blocks, Or a partial sensing method of enabling resource reservation between different transport blocks, thereby improving the success rate of data transmission.

Alternatively, the smaller the value of the priority indication information in the sideline control information SCI sent by the first device is, the higher the priority indicated by the SCI is, and a smaller second threshold value is used. Wherein, a smaller second threshold value can make the first device have a greater possibility to determine that the resource selection mode of the sidelink is a random selection mode in which the resource reservation between different transport blocks is turned off, or , the possibility of a partially perceptual approach, or a fully perceptual approach, where resource reservations between different transport blocks are turned off, thereby reducing transmission collisions.

In addition, the first threshold value and/or the second threshold value may be pre-configured, or may be configured from a network device, which is not limited herein.

S202. The first device determines sidelink resources according to the resource selection mode of the sidelink SL.

In this embodiment, the first device determines the sidelink resource according to the resource selection mode on the sidelink SL determined in step S201, where the sidelink resource is used to send the transmission data of the SL.

In a possible implementation manner, after the first device determines the sidelink resource in the first resource pool according to the resource selection method of the sidelink in step S202, the method further includes: the first device determines the sidelink resource. The reservation state of the sideline resource; after that, the first device sends the sideline control information SCI to the second device according to the sideline resource, where the SCI includes first indication information, and the first indication information is used to indicate the sideline resource. reservation status.

Specifically, the reservation status of the sidelink resource may be reserved or unreserved, and the first device indicates the reservation status of the sidelink resource to the second device through the SCI, so that the second device can use the SCI to further Determine the reservation status of the sideline resource. Compared with the second device detecting and determining the reserved state of the sideline resources by itself, the power consumption of the second device can be reduced.

In addition, the reservation state includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved, and the reservation is used to indicate that at least the resource after the time unit where the SCI is located is not reserved A reservation of a resource. Wherein, the reservation state of the sideline resource indicated by the first indication information carried in the SCI is unreserved or reserved, wherein, when the reservation state is unreserved, it can indicate that the time unit where the SCI is located after the The resource is not reserved; when the reservation status is reserved, it can indicate the reservation of at least one resource after the time unit where the SCI is located. Various implementations of the reservation state are provided, so that the second device can determine various reservation states of the sideline resource through the SCI. In addition, the first device may indicate the reservation status of the sideline resource in various ways in the SCI. For details, reference may be made to the implementation process of step S102 in the embodiment shown in FIG. 4 , which will not be repeated here.

In a possible implementation manner, after the first device determines the sidelink resource in the first resource pool according to the resource selection method of the sidelink in step S202, the method further includes: the first device according to the sidelink resource The sideline resource sends sideline control information SCI to the second device that carries second indication information, where the second indication information is used to indicate that the resource selection mode of the sideline resource includes one of the following at least two ways:

Totally perceptual way.

Specifically, the SCI sent by the first device to the second device may further carry second indication information for indicating the resource selection mode of the sideline resource. It can enable the second device to determine the resource selection mode of the sideline resource, and further determine the data transmission resource of the second device according to the resource selection mode of the sideline resource, which can reduce the number of the second device and the first device to a certain extent. Therefore, the aforementioned problem 3 is solved, and the communication efficiency is further improved.

In a possible implementation manner, the SCI sent by the first device to the second device may further carry third indication information for indicating the resource selection mode of the first device. This enables the second device to determine the data transmission resources of the second device according to the resource selection mode of the first device, further reduces the probability of transmission collision between the second device and the first device, and further improves communication efficiency.

In a possible implementation manner, the sideline resource selection mode of the first device is a partial sensing mode or a random selection mode; after that, when the first device determines that the first priority is higher than the second priority, it can preempt the The reserved resources indicated by the sideline control information of the second device. The first priority level is used to indicate the priority level indicated by the priority indication information in the sideline control information sent by the first device, and the second priority level is used to indicate the priority level in the sideline control information from the second device. The priority indicates the priority indicated by the information. Therefore, high-priority services can be transmitted using reserved resources corresponding to other low-priority services, and the success rate of data transmission corresponding to higher-priority services is improved. Optionally, the resource selection mode of the second device is a fully aware mode.

Wherein, the higher the first priority, the smaller the value of the priority indication information in the sideline control information sent by the first device; or, the lower the first priority, the lower the value of the sideline control information sent by the first device. The value of the priority indication information in the control information is larger. Similarly, the higher the second priority, the smaller the value of the priority indication information in the sideline control information from the second device; or, the lower the second priority, the lower the sideline control information from the second device. The greater the priority indication information in .

Further, the first device may preempt the reserved resources indicated by the sideline control information from the second device only when a preset condition is met. Wherein, the preset condition may include when the detected signal quality of the first device is lower than the third threshold and/or the first priority is higher than the fourth threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

In this embodiment, the first device determines the resource selection method of the sidelink SL according to the first parameter; after that, the first device determines the sidelink resource according to the resource selection method of the sidelink SL, and the sidelink resource uses It is used to send the transmission data of SL. Wherein, the first device may determine a resource selection manner in the sidelink according to the first parameter. Compared with the fact that the first device can only determine a single resource selection mode according to a single configuration of the network device, the first device can be made to determine the resource selection mode in the SL more flexibly and autonomously according to the first parameter, thereby solving the aforementioned problem 2 and adapting to the Different scenarios to improve communication efficiency.

FIG. 6 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application. As shown in the figure, the sidelink communication method includes the following steps.

S301. The first device acquires first indication information.

In this embodiment, the first device acquires first indication information, where the first indication information is used to indicate at least two resource selection modes in the first device.

In a possible implementation manner, the at least two resource selection manners include at least two of the following:

Totally perceptual way.

Or, the at least two resource selection methods include at least two of the following:

random selection;

part of the way of perception;

full perception;

Wherein, the random selection method is that the first device randomly selects a resource with a certain probability in the resource selection window. The partial sensing manner is that the first device selects resources according to resource occupation information of partial time units in the sensing window. The complete perception is that the first device selects resources according to resource occupation information of all time units that can be detected in the perception window.

S302. The first device determines a target resource selection mode among the at least two resource selection modes according to the first indication information.

In this embodiment, the first device determines a target resource selection mode among the at least two resource selection modes according to the first indication information obtained in step S301.

S303. The first device determines a sideline resource according to the target resource selection method.

In this embodiment, after the first device determines the target resource selection method in step S302, in step S303, the first device determines the sideline resource according to the target resource selection method.

In a possible implementation manner, after the first device determines the sideline resource on the first resource pool according to the target resource selection method in step S303, the method further includes: the first device determines the preset resource of the sideline resource. After that, the first device sends the first sideline control information SCI to the second device according to the sideline resource, where the SCI includes a first indication, and the first indication is used to indicate the reservation state of the sideline resource.

Specifically, the reservation status of the sidelink resource may be reserved or unreserved, and the first device indicates the reservation status of the sidelink resource to the second device through the first SCI, so that the second device can pass the reservation status of the sidelink resource. The first SCI further determines the reservation status of the sideline resource. Compared with the second device detecting and determining the reserved state of the sideline resources by itself, the power consumption of the second device can be reduced.

In a possible implementation manner, after the first device determines the sideline resource on the first resource pool according to the target resource selection method in step S303, the method further includes: the first device forwards the sideline resource to the first device according to the sideline resource. The second device sends the second sideline control information SCI, wherein the second SCI includes second indication information, and the second indication information is used to indicate that the resource selection mode of the sideline resource includes one of the following at least two ways:

Totally perceptual way.

Or, the resource selection manner used by the second indication information to indicate the sideline resource includes one of the following at least two manners:

random selection;

part of perception;

Totally perceptual way.

The enabling or disabling of resource reservation between different transport blocks means that the reservation status of the sideline resource determined by the corresponding resource selection method is reserved or unreserved.

Specifically, the unreserved may indicate that the resource after the time unit where the sideline resource is located is not reserved, and the reservation may indicate the reservation of at least one resource after the time unit where the sideline resource is located. Therefore, in the second SCI sent by the first device to the second device, it can also carry second indication information for indicating the resource selection mode of the sideline resource, so that the second device can determine the resource selection of the sideline resource. method, and further determine the data transmission resource of the second device according to the resource selection method of the sideline resource. Therefore, the aforementioned problem 3 can be solved, the transmission collision between the second device and the first device can be reduced to a certain extent, and the communication efficiency can be further improved.

In a possible implementation manner, after the first device determines the sideline resource on the first resource pool according to the target resource selection method in step S303, the method further includes: the first device according to the sideline resource direction The second device sends third sideline control information SCI, where the third SCI further includes third indication information, where the third indication information is used to indicate the resource selection mode of the first device.

Specifically, the third SCI sent by the first device to the second device may also carry third indication information for indicating the resource selection mode of the first device, so that the second device can The selection method determines the data transmission resources of the second device, which can reduce the transmission collision between the second device and the first device to a certain extent, and further improve the communication efficiency.

In a possible implementation manner, the sideline resource selection mode of the first device is a partial sensing mode or a random selection mode; when the first device determines that the first priority is higher than the second priority, it can preempt the first priority. The reserved resources indicated by the sideline control information of the second device. The first priority level is used to indicate the priority level indicated by the priority indication information in the sideline control information sent by the first device, and the second priority level is used to indicate the priority level in the sideline control information from the second device. The priority indicates the priority indicated by the information. Therefore, high-priority services can be transmitted using reserved resources corresponding to other low-priority services, and the success rate of data transmission corresponding to higher-priority services is improved. Optionally, the resource selection mode of the second device is a fully aware mode.

Further, the first device may preempt the reserved resources indicated by the sideline control information from the second device only when a preset condition is met. Wherein, the preset condition includes when the detected signal quality of the first device is lower than the first threshold and/or the first priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

In this embodiment, the first device acquires first indication information, where the first indication information is used to indicate at least two resource selection modes in the first device; A target resource selection mode is determined among the two resource selection modes; after that, the first device determines a sideline resource according to the target resource selection mode.

Wherein, after acquiring the first indication information for indicating at least two resource selection modes, the first device may determine a target resource selection mode among the at least two resource selection modes, and further determine a side row according to the target resource selection mode resource. Therefore, the aforementioned problem 2 is solved, and a more flexible resource selection method can be provided for the first device compared with the first device only being able to determine a single resource selection method according to a single configuration of the network device.

FIG. 7 is a schematic diagram of another sidelink communication method provided by an embodiment of the present application. As shown in the figure, the sidelink communication method includes the following steps.

S401. The first device sends the first sideline control information SCI to the second device.

In this embodiment, the first device sends the first sideline control information SCI to the second device, where the first SCI includes first indication information, and the first indication information is used to indicate the sideline resource selection mode of the first device; Correspondingly, the second device receives the first SCI from the first device in step S401.

In a possible implementation manner, the sideline resource selection manner of the first device includes at least one of the following:

Totally perceptual way.

random selection;

part of perception;

full perception;

In addition, the enabling or disabling of resource reservation between different transport blocks means that the reservation status of the lateral resource determined by the corresponding resource selection method is reserved or unreserved.

Specifically, the unreserved may indicate that the resource after the time unit where the sideline resource is located is not reserved, and the reservation may indicate the reservation of at least one resource after the time unit where the sideline resource is located. Therefore, the first device determines the resource selection mode of the SL among the above-mentioned multiple resource selection modes. Compared with the first device that can only determine a single resource selection mode according to a single configuration of the network device, it can provide the first device with more flexible options. How resources are selected.

In a possible implementation manner, the first indication information includes a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information. Specifically, the first indication information can be implemented in various ways, that is, the first indication is implemented in a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information in the SCI. The bearer of the indication information provides multiple possible implementation manners of the first indication information, and improves the implementability of the solution.

S402. The second device determines data transmission resources of the second device according to the first indication information.

In this embodiment, after obtaining the first SCI in step S401, the second device determines the data transmission resource of the second device in step S402 according to the first indication information in the first SCI.

In a possible implementation manner, in step S402, the process of the second device determining the data transmission resources of the second device according to the first indication information may specifically include: the second device according to the to-be-sent SCI in the process The priority indication information and/or the received priority indication information in the SCI from the first device determines whether to preempt the reserved resources indicated by the first SCI. Wherein, the resource selection mode of the first device is a fully aware mode, and the resource selection mode of the second device is a random selection mode; or, the resource selection mode of the first device is a fully aware mode, and the resource selection mode of the second device is Partial sensing selection mode; or, the resource selection mode of the first device is a full sensing mode, and the resource selection mode of the second device is a random selection mode; or, the resource selection mode of the first device is a partial sensing mode, and the second device The resource selection mode of the device is a random selection mode; or, the resource selection mode of the first device is random selection, and the resource selection mode of the second device is a partial sensing mode.

Optionally, in this embodiment and subsequent embodiments, the received SCI from the first device may include the first SCI sent by the first device in step S401.

In the above technical solution, the second device can dynamically determine whether it can preempt the reserved resources of the second device according to the service priority of the SCI to be sent by the second device and the service priority of the SCI received from the first device, so as to Improve the pertinence of preemption, preventing low-priority services from preempting reserved resources for high-priority services.

In a possible implementation manner, the process of determining, by the second device, the data transmission resources of the second device according to the first indication information may further include: determining, by the second device, a priority indication in the to-be-sent SCI When the information is less than the preset threshold, the second device preempts the reserved resource indicated by the first SCI.

Specifically, since the numerical value of the priority indication information in the SCI is negatively correlated with the service priority of the SCI, that is, the larger the numerical value of the priority indication information in the SCI, the lower the service priority of the SCI; or, the SCI The smaller the value of the priority indication information in , the higher the service priority of the SCI. Wherein, when the second device determines that the priority indication information in the to-be-sent SCI is less than the preset threshold, that is, when the second device determines that the service priority of the to-be-sent SCI is higher, the second device preempts the incoming The reserved resource indicated by the SCI of the first device. Therefore, in the second device, when the service priority of the SCI to be sent is higher, the transmission success rate of the data corresponding to the SCI to be sent is improved.

In another possible implementation manner, the second device determining the data transmission resource of the second device according to the first indication information may further include: in the received SCI and/or data signal from the first device The quality threshold is higher than the preset threshold, and when the second device determines that the priority indication information in the SCI to be sent is smaller than the preset threshold, the second device preempts the reserved resources indicated by the first SCI.

Specifically, when the second device determines that the received signal quality threshold of the SCI and/or data from the first device is higher than the preset threshold, it determines that the transmission resource used by the first device is relatively idle, and the second device preempts The transmission resource used by the first device will not affect the first device. Therefore, on the premise of not affecting the communication of other devices, the utilization rate of the reserved resources indicated by the first SCI is improved.

In a possible implementation manner, the second device determining the data transmission resource of the second device according to the first indication information may further include: the priority indication information in the SCI to be sent is lower than the received information from the When the priority in the SCI of the first device indicates the information, the second device preempts the reserved resources indicated by the first SCI.

Specifically, when the second device determines that the indication information of the SCI to be sent is lower than the priority indication information in the SCI received from the first device, the second device may determine that the priority of the service of the SCI to be sent is higher than that received from the first device. The business priority of the device's SCI. Therefore, the second device preempts the reserved resource indicated by the first SCI, so that data corresponding to a higher service priority can be transmitted using the reserved resource, improves the utilization rate of the reserved resource indicated by the first SCI, and improves the The transmission success rate of the data corresponding to the SCI to be sent.

In a possible implementation manner, the sideline resource selection mode of the second device is a partial sensing mode or a random selection mode; when the second device determines that the second priority is higher than the first priority, it can preempt the first priority. Reserved resources indicated by sideline control information of a device. The first priority level is used to indicate the priority level indicated by the priority indication information in the sideline control information from the first device, and the second priority level is used to indicate the priority level in the sideline control information sent by the second device. The priority indicates the priority indicated by the information. Therefore, high-priority services can be transmitted using reserved resources corresponding to other low-priority services, and the success rate of data transmission corresponding to higher-priority services is improved.

Further, the second device may preempt the reserved resources indicated by the sideline control information from the second device only when a preset condition is met. Wherein, the preset condition includes when the detected signal quality of the first device is lower than the first threshold and/or the first priority is higher than the second threshold. Therefore, under the premise of restricting the preemption condition of the first device and avoiding influence on the communication of other devices, the success rate of data transmission corresponding to the high-priority service is improved.

In this embodiment, the second device receives the first sideline control information SCI from the first device, where the first SCI includes first indication information, and the first indication information is used to indicate the sideline resource selection mode of the first device and thereafter, the second device determines the data transmission resource of the second device according to the first indication information. The SCI sent by the first device to the second device may carry first indication information for indicating the resource selection mode of the first device, so that the second device can determine the resource selection mode of the first device according to the resource selection mode of the first device. Data transmission resources of the second device. Therefore, the aforementioned problem 3 is solved. Compared with the second device determining the data transmission resources of the second device through detection, while reducing the power consumption of the second device, the relationship between the second device and the first device can also be reduced to a certain extent. between transmission collisions, improve communication efficiency.

The embodiments of the present application are described above from the perspective of methods, and the following describes the communication devices in the embodiments of the present application from the perspective of specific device implementation.

Referring to FIG. 8 , an embodiment of the present application provides a schematic diagram of a communication apparatus 800 , where the communication apparatus 800 at least includes a processing unit 802 and a possible transceiving unit 801 .

In a possible implementation manner, the communication apparatus 800 includes:

A processing unit 802, configured to select a sideline resource by a random selection method or a partial perception method, where the partial perception method is that the first device selects resources according to resource occupation information of a partial time unit in the perception window;

The transceiver unit 801 is configured to send the sideline control information SCI to the second device on the sideline resource, wherein the SCI includes first indication information, and the first indication information is used to indicate the information of the sideline resource. The reservation status is unreserved.

In a possible implementation manner, the processing unit 802 is specifically configured to: select a sideline resource on a first resource pool by a random selection method or a partial sensing method, wherein the inter-cycle data is activated or enabled on the first resource pool Reservation for packet transmission.

In a possible implementation manner, the reservation status includes the unreserved and reserved, wherein the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved, and the reserved is used to indicate that the resource is not reserved. Reservation of at least one resource after the time unit where the SCI is located.

In one possible implementation,

The reservation of the at least one resource includes the reservation of the first data packet resource, and/or,

In a possible implementation manner, the first indication information is a reserved bit field and/or a resource reservation period field in the SCI.

In a possible implementation manner, the period value corresponding to the reservation state in the resource reservation period field does not belong to the period value configured in the first resource pool.

In a possible implementation manner, the corresponding value of the reserved state in the SCI is any one or more of the following values: [Nr, Nr+1, ..., ceil(log2(Nr))-1 [ Multiple values listed.

In a possible implementation manner, the reserved status of the sideline resource includes the status value of the time domain resource and/or the status value of the frequency domain resource in the SCI, for example, the status value of the time domain resource and/or The value of the state of the frequency domain resource is: 0 or a value other than the preset value, and the reservation state of the sideline resource is unreserved.

In a possible implementation manner, the processing unit 802 is further configured to:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

Received Signal Strength Indication RSSI;

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.

In a possible implementation manner, the processing unit 802 is further configured to determine, according to the first parameter, that the reservation status of the sideline resource is unreserved or reserved.

In a possible implementation manner, the transceiver unit 801 is further used for:

When the first parameter satisfies the preset condition, the resource selection mode of the SL is determined to be a random selection mode or a partial sensing mode among at least two resource selection modes, wherein the at least two resource selection modes include at least two of the following:

In a possible implementation manner, the SCI further includes third indication information, where the third indication information is used to indicate a resource selection manner of the first device.

In a possible implementation manner, the first device determines the reservation state of the sideline resource according to fourth indication information, where the fourth indication information is configuration information and/or pre-configuration information from the network device.

In a possible implementation manner, before the first device selects the sideline resource through random selection or partial sensing, the transceiver unit 801 is further configured to:

In a possible implementation manner, the first resource pool is a resource pool that multiplexes the full sensing mode and the partial sensing mode, or the first resource pool is a resource pool that multiplexes the full sensing mode and the random selection mode.

In a possible implementation manner, when the first priority is higher than the second priority, the first device preempts the reserved resources indicated by the sideline control information from the second device, where the first priority is used In order to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information from the second device priority.

In a possible implementation manner, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the first device preempts the signal from the second device The reserved resources indicated by the sideline control information.

It should be noted that, for details such as the information execution process of the units of the communication apparatus 800, reference may be made to the descriptions in the method embodiments (eg, the embodiment shown in FIG. 4 ) shown in the foregoing application, which will not be repeated here.

In another possible implementation manner, the communication apparatus 800 includes:

A transceiver unit 801, configured to receive, on the sideline resource, sideline control information SCI sent by a first device, where the SCI includes first indication information, and the first indication information is used to indicate the sideline resource The reservation status is Unreserved.

In a possible implementation manner, the reservation of the at least one resource includes the reservation of the first data packet resource, and/or,

In a possible implementation manner, the reserved status of the sideline resource includes the status value of the time domain resource and/or the status value of the frequency domain resource in the SCI, for example, the status value of the time domain resource and/or When the value of the state of the frequency domain resource is: 0 or a value other than the preset value, the reservation state of the sideline resource is unreserved.

In a possible implementation manner, the first resource pool is a resource pool that multiplexes a full sensing mode and a partial sensing mode, or the first resource pool is a resource pool that multiplexes a full sensing mode and a random selection mode.

In a possible implementation manner, the communication apparatus further includes a processing unit 802, and the sideline resource selection manner of the communication apparatus is a partial sensing manner or a random selection manner;

When the second priority is higher than the first priority, the processing unit 802 is configured to control the transceiver unit 801 to preempt the reserved resources indicated by the sideline control information from the first device, wherein the first priority is used to indicate the priority indicated by the priority indication information in the sideline control information from the first device, and the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information sent by the second device .

In a possible implementation manner of the second aspect of the embodiment of the present application, when the detected signal quality of the second device is lower than the first threshold and/or when the first priority is higher than the second threshold, the processing The unit 802 controls the transceiver unit 801 to preempt the reserved resources indicated by the sideline control information from the second device.

a processing unit 802, configured to determine a resource selection mode of the sidelink SL according to the first parameter;

The processing unit 802 is further configured to determine a sidelink resource according to the resource selection mode of the sidelink SL, where the sidelink resource is used to send the transmission data of the SL.

In a possible implementation manner, the first parameter includes at least one of the following: channel quality information and/or service attributes of the transmission data of the SL;

In a possible implementation manner, the service attribute of the transmission data of the SL is at least one of the following:

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.

The channel quality information is at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

The received signal strength indicates RSSI.

In a possible implementation manner, the resource selection manner includes at least one of the following:

Totally perceptual way.

Or, the resource selection method includes at least one of the following:

random selection;

part of perception;

full perception;

In a possible implementation manner, the processing unit 802 is further configured to determine the reservation status of the sideline resource.

The transceiver unit 801 is further configured to send the sideline control information SCI to the second device according to the sideline resource, where the SCI includes first indication information, and the first indication information is used to indicate the reservation state of the sideline resource.

Acquire second indication information, where the second indication information is used to indicate that the resource selection manner includes at least two resource selection manners, and the at least two resource selection manners include:

Totally perceptual way.

In a possible implementation manner, when the measured value of the channel quality information is less than the first threshold value, or when the service attribute of the transmission data of the SL satisfies a preset condition: the resource selection method of the sidelink is as follows: A random selection method of resource reservation enable between different transport blocks; or a partial perception method of resource reservation enable between different transport blocks.

In a possible implementation manner, the measured value of the channel quality information is greater than the second threshold value, and/or when the service attribute of the transmission data of the SL does not meet the preset condition, the resource selection of the sidelink The method includes at least one of the following two methods:

Totally perceptual way.

In a possible implementation manner, the first threshold value and/or the second threshold value is associated with priority indication information in the sideline control information sent and/or received by the first device.

In a possible implementation manner, the numerical value of the priority indication information in the sideline control information sent by the first device is positively correlated with the size of the second threshold value.

In a possible implementation manner, the first threshold and/or the second threshold are preconfigured.

Send the sideline control information SCI to the second device according to the sideline resource, where the SCI includes second indication information, and the second indication information is used to indicate that the resource selection mode of the sideline resource includes one of the following at least two ways :

Totally perceptual way.

In a possible implementation manner, the sideline resource selection manner of the communication apparatus 800 is a partial sensing manner or a random selection manner;

When the first priority is higher than the second priority, the processing unit 802 is further configured to control the transceiver unit 801 to preempt the reserved resources indicated by the sideline control information from the second device, wherein the first priority is In order to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information from the second device priority.

In a possible implementation manner, when the detected signal quality of the first device is lower than a third threshold and/or when the first priority is higher than a fourth threshold, the processing unit 802 is specifically configured to control the The transceiver unit 801 preempts the reserved resources indicated by the sideline control information from the second device.

It should be noted that, for details such as the information execution process of the units of the communication device 800, reference may be made to the descriptions in the method embodiments (eg, the embodiment shown in FIG. 5 ) previously shown in this application, and details are not repeated here.

A transceiver unit 801, configured to acquire first indication information, where the first indication information is used to indicate at least two resource selection modes in the first device;

The processing unit 802 is configured to determine a target resource selection mode among the at least two resource selection modes according to the first indication information; and determine a sideline resource according to the target resource selection mode.

full perception;

In a possible implementation manner, after the first device determines the sideline resource according to the target resource selection manner, the processing unit 802 is further configured to determine the reservation state of the sideline resource.

The transceiver unit 801 is further configured to send the first sideline control information SCI to the second device according to the sideline resource, where the SCI includes a first indication, and the first indication is used to indicate the reservation state of the sideline resource.

In a possible implementation manner, after the first device determines the sideline resource according to the target resource selection manner, the transceiver unit 801 is further configured to:

Totally perceptual way.

In a possible implementation manner, the sideline resource selection mode of the communication device 800 is a partial sensing mode or a random selection mode;

When the first priority is higher than the second priority, the processing unit 802 is further configured to control the transceiver unit 801 to preempt the reserved resources indicated by the sideline control information from the second device, where the first priority is In order to indicate the priority indicated by the priority indication information in the sideline control information sent by the first device, the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information from the second device priority.

In a possible implementation manner, when the detected signal quality of the first device is lower than a first threshold and/or when the first priority is higher than a second threshold, the processing unit 802 is specifically configured to control the transceiving The unit 801 preempts the reserved resources indicated by the sideline control information from the second device.

It should be noted that, for details such as the information execution process of the units of the communication device 800, reference may be made to the descriptions in the method embodiments (eg, the embodiment shown in FIG. 6 ) previously shown in this application, which will not be repeated here.

A transceiver unit 801, configured to receive first sideline control information SCI from a first device, where the first SCI includes first indication information, and the first indication information is used to indicate sideline resource selection of the first device Way;

The processing unit 802 is configured to determine data transmission resources of the second device according to the first indication information.

In a possible implementation manner, the processing unit 802 is specifically used for:

Optionally, the received SCI from the first device may include the first SCI.

When the second device determines that the priority indication information in the to-be-sent SCI is smaller than a preset threshold, it preempts the reserved resource indicated by the first SCI.

Optionally, the received SCI from the first device may include the first SCI.

In a possible implementation manner, the processing unit 802 is specifically configured to control the transceiver unit 801:

When the signal quality threshold of the SCI and/or data received from the first device is higher than a preset threshold, and the second device determines that the priority indicated by the priority indication information in the SCI to be sent is greater than the preset threshold When the threshold is set, the reserved resources indicated by the first SCI are preempted.

Optionally, the received SCI from the first device may include the first SCI.

When the priority indicated by the priority indication information in the SCI to be sent is higher than the priority indicated by the priority indication information in the SCI received from the first device, preempt the reserved resources indicated by the first SCI .

Optionally, the received SCI from the first device may include the first SCI.

Totally perceptual way.

random selection;

part of perception;

full perception;

In a possible implementation manner, the first indication information includes a reserved field in the first-level sideline control information and/or a reserved field in the second-level sideline control information.

When the second priority is higher than the first priority, the processing unit 802 is further configured to control the transceiver unit 801 to preempt the reserved resources indicated by the sideline control information from the first device, where the first priority is In order to indicate the priority indicated by the priority indication information in the sideline control information from the first device, the second priority is used to indicate the priority level indicated by the priority indication information in the sideline control information sent by the second device. priority.

In a possible implementation manner, when the detected signal quality of the second device is lower than a first threshold and/or when the first priority is higher than a second threshold, the processing unit 802 is specifically configured to control the The transceiver unit 801 preempts the reserved resources indicated by the sideline control information from the second device.

It should be noted that, for details such as the information execution process of the units of the communication device 800, reference may be made to the descriptions in the method embodiments (eg, the embodiment shown in FIG. 7 ) previously shown in this application, and details are not repeated here.

A transceiver unit 801, configured to send first sideline control information SCI to a second device, where the first SCI includes first indication information, and the first indication information is used to indicate a sideline resource selection mode of the first device ;

Totally perceptual way.

random selection;

part of perception;

full perception;

Please refer to FIG. 9 , which is a possible schematic diagram of the communication apparatus 900 involved in the above-mentioned embodiments provided for the embodiment of the present application. The communication apparatus may specifically be the first device or the second device in the foregoing embodiment. The communication device 900 may include, but is not limited to, a processor 901 , a communication port 902 , a memory 903 , and a bus 904 . In this embodiment of the present application, the processor 901 is configured to control and process actions of the communication device 900 .

Furthermore, the processor 901 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

It should be noted that the communication apparatus shown in FIG. 9 can be specifically used to implement the functions of the steps performed by the first device or the second device in the method embodiments corresponding to FIGS. 4 to 7 , and to implement the corresponding functions of the first device or the second device For the specific implementation of the communication device shown in FIG. 9 , reference may be made to the descriptions in the respective method embodiments corresponding to FIG. 4 to FIG. 7 , which will not be repeated here.

Embodiments of the present application further provide a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the possible implementations of the communication device in the foregoing embodiments. method, wherein the communication device may specifically be the first device or the second device in the method embodiments corresponding to the foregoing FIG. 4 to FIG. 7 .

Embodiments of the present application further provide a computer program product that stores one or more computers. When the computer program product is executed by the processor, the processor executes the method for possible implementations of the above communication device, wherein the communication device may specifically be It is the first device or the second device in the method embodiments corresponding to FIG. 4 to FIG. 7 .

An embodiment of the present application further provides a chip system, where the chip system includes a processor, which is configured to support the communication apparatus to implement the functions involved in the possible implementation manners of the foregoing communication apparatus. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips, or may include chips and other discrete devices, wherein the communication device may specifically be the first device or the second device in the method embodiments corresponding to FIG. 4 to FIG. 7 .

An embodiment of the present application further provides a network system architecture, where the network system architecture includes the foregoing communication apparatus, and the communication apparatus may specifically be the first device and/or the second device in the method embodiments corresponding to FIG. 4 to FIG. 7 .

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Claims

A sidelink communication method, comprising:

The first device selects the sideline resources through a random selection method or a partial perception method, where the partial perception method is that the first device selects resources according to resource occupancy information of a partial time unit in the perception window;

The first device sends the sideline control information SCI to the second device on the sideline resource, wherein the SCI includes first indication information, and the first indication information is used to indicate the preset of the sideline resource. The reservation status is unreserved.
The method according to claim 1, wherein the reservation status includes the unreserved and reserved,

The unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved, and the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.
The method according to claim 1 or 2, characterized in that,

The first indication information is a reserved bit field and/or a resource reservation period field in the SCI.
The method according to any one of claims 1 to 3, wherein the method further comprises:

When the first parameter satisfies the preset condition, the first device determines that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode, where the first parameter includes at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

Received Signal Strength Indication RSSI;

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.
The method according to any one of claims 1 to 4, wherein the method further comprises:

The first device acquires second indication information, where the second indication information is used to indicate at least two resource selection modes.
The method according to claim 4 or 5, wherein, when the first parameter satisfies a preset condition, the first device determines that the resource selection mode of the SL is a random selection mode or a partial sensing mode, comprising:

When the first parameter satisfies a preset condition, the first device determines, in at least two resource selection modes, that the resource selection mode of the SL is a random selection mode or a partial sensing mode, wherein the at least two resource selection modes are The selection methods include at least two of the following:

Random selection of resource reservation enable between different transport blocks;

Partial awareness of resource reservation enablement between different transport blocks;

Random selection of resource reservation off between different transport blocks;

Partial awareness of resource reservation off between different transport blocks;

A complete sensing mode, where the first device selects resources according to resource occupation information of all time units that can be detected in the sensing window.
The method according to any one of claims 1 to 6, wherein the SCI further comprises third indication information, wherein the third indication information is used to indicate a resource selection mode of the first device.
A communication device, comprising:

a processing unit, configured to select a sideline resource by a random selection method or a partial perception method, where the partial perception method is that the first device selects resources according to resource occupation information of a partial time unit in the perception window;

A transceiver unit, configured to send the sideline control information SCI to the second device on the sideline resource, wherein the SCI includes first indication information, and the first indication information is used to indicate the preset of the sideline resource. The reservation status is unreserved.
The apparatus according to claim 8, wherein the reservation status includes the unreserved and reserved,

Wherein, the unreserved is used to indicate that the resource after the time unit where the SCI is located is not reserved, and the reservation is used to indicate the reservation of at least one resource after the time unit where the SCI is located.
The device according to claim 8 or 9, characterized in that,

The first indication information is a reserved bit field and/or a resource reservation period field in the SCI.
The device according to any one of claims 8 to 10, characterized in that:

The processing unit is specifically configured to determine that the resource selection mode of the sidelink SL is a random selection mode or a partial sensing mode when the first parameter satisfies a preset condition, wherein the first parameter includes at least one of the following:

Channel occupancy ratio CR;

Channel busy than CBR;

reference signal received power RSRP;

Received Signal Strength Indication RSSI;

SL's priority of transmitting data;

SL's delay requirements for data transmission;

Communication distance requirements for SL's data transmission;

The transmission reliability requirements of SL's transmission data.
The device according to any one of claims 8 to 11, characterized in that:

The transceiver unit is further configured to acquire second indication information, where the second indication information is used to indicate at least two resource selection modes.
The device according to claim 11 or 12, characterized in that:

The processing unit is specifically configured to, when the first parameter satisfies a preset condition, determine, among at least two resource selection modes, that the resource selection mode of the SL is a random selection mode or a partial sensing mode, wherein the at least two resource selection modes are Resource selection methods include at least two of the following:

Random selection of resource reservation enable between different transport blocks;

Partial awareness of resource reservation enablement between different transport blocks;

Random selection of resource reservation off between different transport blocks;

Partial awareness of resource reservation off between different transport blocks;

A complete sensing mode, where the first device selects resources according to resource occupation information of all time units that can be detected in the sensing window.
The apparatus according to any one of claims 8 to 13, wherein the SCI further comprises third indication information, where the third indication information is used to indicate a resource selection mode of the first device.
A communication device, characterized in that the device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the method as claimed in the claims The method of any one of 1 to 7.
A communication device, characterized by comprising at least one processor and an interface circuit, wherein

the interface circuit for providing programs or instructions for the at least one processor;

The at least one processor is configured to execute the program or instructions such that the communication device implements the method of any one of claims 1 to 7.
A computer-readable storage medium having instructions stored thereon which, when executed by a computer, implements the method of any one of claims 1 to 7.