CN114978451A

CN114978451A - Sidelink transmission method, device and terminal

Info

Publication number: CN114978451A
Application number: CN202210362378.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Nanjing Xingsi Semiconductor Co ltd
Current assignee: Nanjing Xingsi Semiconductor Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-08-30
Anticipated expiration: 2042-04-07
Also published as: CN114978451B

Abstract

The application discloses a method, a device and a terminal for Silelink transmission, which belong to the technical field of communication and comprise the following steps: the terminal determines a target transmission resource of a resource pool positioned in a shared frequency band according to a target rule, wherein the target transmission resource is used for the terminal to carry out Sidelink communication; the target rule includes at least one of: under the condition that the size of the resource pool is larger than the size of the LBT bandwidth, determining the LBT bandwidth which can be used for the terminal to carry out Sidelink communication in the resource pool based on the LBT monitoring result of each LBT bandwidth in the resource pool; under the condition that the size of the resource pool is smaller than or equal to the size of the LBT bandwidth, if the LBT monitoring of the resource pool is successful, determining that the resource pool can be used for the terminal to carry out the Sildelink communication; and under the condition that the size of the resource pool is smaller than or equal to the size of the LBT bandwidth, if the LBT monitoring of the resource pool fails, determining that the resource pool cannot be used for the terminal to carry out the Sildelink communication.

Description

Sidelink transmission method, device and terminal

Technical Field

The application belongs to the technical field of communication, and particularly relates to a method, a device and a terminal for Sidelink transmission.

Background

In Sidelink (SL) communication, a terminal can only transmit or transmit on a Resource pool within an active Bandwidth Part (BWP), the size of the Resource pool can be configured to be 10-275 Resource Blocks (RBs), each Resource pool contains 27 subchannels at most, and each Subchannel is a set of multiple (no less than 10) Physical Resource Blocks (PRBs) that are continuously non-overlapping in a single slot.

However, in the cpns, the size of the existing SL resource pool may exceed the Listen Before Talk (LBT) bandwidth, and if the behavior of the terminal in the cpns is not clear, the reliability of the terminal in the cpns may be low.

Disclosure of Invention

The embodiment of the application provides a method, a device and a terminal for Sidelink transmission, which can solve the problem that the reliability of Sidelink communication performed by the terminal on a shared frequency band is low.

In a first aspect, a Sidelink transmission method is provided, and is applied to a terminal, and the method includes:

determining target transmission resources of a resource pool positioned in a shared frequency band according to a target rule, wherein the target transmission resources are used for the terminal to carry out Sildelink communication;

wherein the target rule comprises at least one of a first rule, a second rule, and a third rule:

the first rule is: under the condition that the size of the resource pool is larger than the size of the listen before send LBT bandwidth, determining the LBT bandwidth which can be used for the terminal to carry out Sidelink communication in the resource pool based on the LBT monitoring result of each LBT bandwidth in the resource pool;

the second rule is: under the condition that the size of the resource pool is smaller than or equal to the size of an LBT bandwidth, if the LBT monitoring of the resource pool is successful, determining that the resource pool can be used for the terminal to carry out Sidelink communication;

the third rule is: and under the condition that the size of the resource pool is smaller than or equal to the size of the LBT bandwidth, if the LBT monitoring of the resource pool fails, determining that the resource pool cannot be used for the terminal to carry out the Sidelink communication.

In a second aspect, a Sidelink transmission apparatus is provided, which is applied to a terminal, and includes:

a determining module, configured to determine, according to a target rule, a target transmission resource of a resource pool located in a shared frequency band, where the target transmission resource is used for the terminal to perform Sidelink communication;

In a third aspect, there is provided a terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions when executed by the processor implementing the steps of the method according to the first aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to determine, according to a target rule, a target transmission resource of a resource pool located in a shared frequency band, where the target transmission resource is used for a Sidelink communication performed by the terminal, and the communication interface is configured to send second information, where the second information is used to indicate at least one of an LBT status corresponding to the resource pool and a channel occupancy time, COT, of the terminal performing the Sidelink communication in the resource pool, and the LBT status is used to characterize an LBT monitoring result corresponding to the resource pool.

In a fifth aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, implement the steps of the method according to the first aspect.

In a sixth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the steps of the method according to the first aspect.

In a seventh aspect, a computer program product stored in a storage medium is provided, the computer program product being executable by at least one processor to implement the steps of the method according to the first aspect.

In the embodiment of the application, a terminal determines a target transmission resource of a resource pool located in a shared frequency band according to a target rule, wherein the target transmission resource is used for performing Sidelink communication by the terminal; wherein the target rules include at least one of: determining an LBT bandwidth which can be used for the terminal to perform Sidelink communication in the resource pool based on an LBT monitoring result of each LBT bandwidth in the resource pool under the condition that the size of the resource pool is larger than the size of the listen before send LBT bandwidth; under the condition that the size of the resource pool is smaller than or equal to the size of an LBT bandwidth, if the LBT monitoring of the resource pool is successful, determining that the resource pool can be used for the terminal to carry out Sidelink communication; and under the condition that the size of the resource pool is smaller than or equal to the size of the LBT bandwidth, if the LBT monitoring of the resource pool fails, determining that the resource pool cannot be used for the terminal to carry out the Sidelink communication. Therefore, when the terminal performs the Sidelink communication in the shared frequency band, the problem of terminal transmission resource determination caused by an LBT mechanism in an SL system can be solved by determining the transmission resource of the terminal for performing the Sidelink communication in the resource pool of the shared frequency band, so that the reliability of performing the Sidelink communication in the shared frequency band by the terminal can be improved, and the congestion problem of the authorized spectrum can be relieved.

Drawings

Fig. 1 is one of the flow diagrams of a Sidelink transmission method provided in the embodiment of the present application;

fig. 2 is a second schematic flow chart of the Sidelink transmission method provided in the embodiment of the present application;

fig. 3 is a schematic structural diagram of a Sidelink transmission apparatus provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

fig. 5 is a schematic hardware structure diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and claims means at least one of connected objects, and a character "/" generally means that the former and latter related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes, for purposes of example, a New Radio (NR) system, and in much of the following description NR terminology is used, although the techniques are also applicableApplications other than NR system applications, e.g. 6 th generation (6) ^th Generation, 6G) communication system.

For convenience of understanding, some contents related to the embodiments of the present application are described below:

the Sidelink transmission provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings through some embodiments and application scenarios thereof.

Referring to fig. 1, fig. 1 is a schematic flow chart of a Sidelink transmission method provided in an embodiment of the present application, where the method is applied to a terminal, and as shown in fig. 1, the method includes the following steps:

step 101, determining a target transmission resource of a resource pool located in a shared frequency band according to a target rule, wherein the target transmission resource is used for the terminal to perform Sidelink communication;

In this embodiment, the shared frequency band may be understood as an unlicensed or unlicensed frequency band, and for a system operating in the shared frequency band, according to a design criterion of Rel-16 new wireless unlicensed (NR-U), a set of regulatory criteria and rules are set and unified as much as possible in different countries and regions to ensure that different systems reasonably coexist in the shared frequency band. The most important of these is to introduce the LBT mechanism, i.e. channel monitoring is necessary before data transmission, and access is available in case of ensuring that the target channel has no interference. However, the LBT mechanism introduces uncertainty in information transmission, so that transmission resources used by the terminal for communication in a resource pool located in the shared frequency band need to be specified based on LBT monitoring results.

The method can perform Sidelink communication on a shared frequency band, namely Sidelink-U, and the Sidelink is applied to the shared frequency band in consideration of large bandwidth on an unlicensed frequency band, so that the problem of resource congestion of licensed spectrum is relieved, and the throughput of a Sidelink system can be improved.

Sildelink also supports BWP configuration, and SL BWP is defined in a similar manner as BWP in NR systems. Further, it is necessary to determine, based on the LBT monitoring result, transmission resources used by the terminal for performing Sidelink communication in the resource pool located in the shared frequency band, so as to solve the problem of uncertainty of information transmission caused by the LBT mechanism.

On one carrier, up to one BWP may be configured or preconfigured and used for Sidelink transmission and reception at the same time. On the licensed spectrum, if a User Equipment (UE) is configured with SL BWP and uplink BWP at the same time, it is necessary to ensure that Sub-Carrier Spacing (SCS) on the two links is the same. The SL BWPs are configurable at subcarrier spacings of 15kHz, 30kHz, or 60kHz in Frequency Range 1(Frequency Range 1, FR1), and at subcarrier spacings of 60kHz or 120kHz in Frequency Range 2(Frequency Range 2, FR 2).

For each Sidelink UE, multiple Sidelink resource pools may be configured on each SL BWP. The resource pool configuration in SL BWP supports a maximum of 16 receive resource pools and 8 transmit resource pools. The resource pool is divided into a plurality of subchannels in the frequency domain, and the subchannels refer to a plurality of (not less than 10) PRBs (PRBs) which are continuously and non-overlapping in a single time slot, and the specific size of the subchannels is configured or preconfigured by a system. For example, the size of Subchannel can be determined by at least one of:

configuring network side equipment;

pre-configuring a terminal;

other terminal indications;

the terminal decides on its own.

The system defines different Channel resources to be used as resource pools of a Physical Sidelink Shared Channel (psch) and a Physical Sidelink Control Channel (PSCCH). The resource allocation, sensing and selection resources are in the minimum unit of Subchannel. The PSCCH occupied resource is the continuous PRB (no more than 25RB) with the minimum sequence number in each Subchannel allocated to the PSSCH, and the number of the PRBs is configured or preconfigured by the system. The transmission resource pool and the reception resource pool are configured separately.

Optionally, the resource pool is determined by at least one of:

configuring network side equipment;

pre-configuring a terminal;

other terminal indications;

the terminal decides itself.

In an optional embodiment, the network side device may configure a Resource pool for the UE through cell broadcast or dedicated Radio Resource Control (RRC) signaling, where the UE needs to monitor the Resource pool for Sidelink transmission.

Further, for each resource pool located in the shared frequency band, according to a target rule, based on an LBT monitoring result, a transmission resource used by the terminal for performing Sidelink communication in the resource pool is determined, so as to solve the problem of uncertainty of information transmission brought by an LBT mechanism.

Specifically, for a resource pool located in the shared frequency band, the terminal may determine, according to the following item, a target transmission resource that can be used for the terminal to perform the Sidelink communication in the resource pool.

Mode 1: when the size of the resource pool is not larger than, i.e., smaller than or equal to, the size of the LBT bandwidth, i.e., at least a portion of the resource pool is located within the LBT bandwidth, the terminal may determine whether transmission can be performed in the resource pool according to the LBT monitoring result corresponding to the resource pool, if LBT monitoring corresponding to the resource pool is successful, the entire resource pool may be used for transmission, and if LBT monitoring corresponding to the resource pool is failed, the entire resource pool may not be used for transmission.

It should be noted that, when the size of the resource pool is not larger than, i.e. smaller than or equal to, the size of the LBT bandwidth, the number of LBT bandwidths corresponding to the resource pool is usually 1.

Wherein the size dimension of the resource pool may be at least one of Hz, RB, RE, and Subchannel, and in an optional embodiment, when the size of the resource pool is not greater than, i.e., less than or equal to, the size of the LBT bandwidth, the number of RBs of the resource pool is not greater than the number of RBs of the LBT bandwidth.

In another alternative embodiment, when the size of the resource pool is not larger than, i.e. smaller than or equal to, the size of the LBT bandwidth, the bandwidth of the resource pool is not larger than the bandwidth of the LBT bandwidth.

In yet another alternative embodiment, when the size of the resource pool is not larger than, i.e. smaller than or equal to, the size of the LBT bandwidth, the number of subchannels of the source pool is not larger than the number of subchannels of the LBT bandwidth.

Optionally, when the size of the resource pool is not greater than, i.e., less than or equal to, the size of the LBT bandwidth, a guard bandwidth may be configured between the LBT bandwidths to prevent sildelink communication interference between different LBT bandwidths.

Optionally, the terminal may determine the LBT bandwidth by at least one of:

configuring network side equipment;

pre-configuring a terminal;

other terminal indications;

the terminal decides on its own.

Alternatively, the LBT bandwidth for the sildelink communication may be 20 MHz.

Mode 2: when the size of the resource pool is larger than the size of the LBT bandwidth, that is, the resource pool corresponds to at least two LBT bandwidths, the terminal may determine, according to the LBT monitoring result of each LBT bandwidth in the resource pool, the LBT bandwidth available for the terminal to perform Sidelink communication in the resource pool.

In an optional embodiment, when the size of the resource pool is larger than the size of the LBT bandwidth, the number of RBs of the resource pool is larger than the number of RBs of the LBT bandwidth.

In another alternative embodiment, when the size of the resource pool is larger than the size of the LBT bandwidth, the bandwidth of the resource pool is larger than the bandwidth of the LBT bandwidth.

In yet another alternative embodiment, when the size of the resource pool is larger than the size of the LBT bandwidth, the number of subchannels of the resource pool is larger than the number of subchannels of the LBT bandwidth.

Optionally, when the size of the resource pool is larger than the size of the LBT bandwidth, a guard bandwidth may be configured between the LBT bandwidths to prevent sildelink communication interference between different LBT bandwidths.

Optionally, the terminal may determine the LBT bandwidth by at least one of:

configuring network side equipment;

pre-configuring a terminal;

other terminal indications;

the terminal decides itself.

Alternatively, the LBT bandwidth for the sildelink communication may be 20 MHz.

In this embodiment, a terminal determines a target transmission resource of a resource pool located in a shared frequency band according to a target rule, where the target transmission resource is used for the terminal to perform Sidelink communication; wherein the target rules include at least one of: determining an LBT bandwidth which can be used for the terminal to perform Sidelink communication in the resource pool based on an LBT monitoring result of each LBT bandwidth in the resource pool under the condition that the size of the resource pool is larger than the size of the listen before send LBT bandwidth; under the condition that the size of the resource pool is smaller than or equal to the size of an LBT bandwidth, if the LBT monitoring of the resource pool is successful, determining that the resource pool can be used for the terminal to carry out Sidelink communication; and under the condition that the size of the resource pool is smaller than or equal to the size of the LBT bandwidth, if the LBT monitoring of the resource pool fails, determining that the resource pool cannot be used for the terminal to carry out the Sidelink communication. Therefore, when the terminal performs the Sidelink communication in the shared frequency band, the problem of determining the terminal transmission resource caused by an LBT mechanism in an SL system can be solved by determining the transmission resource of the terminal for performing the Sidelink communication in the resource pool of the shared frequency band, so that the reliability of performing the Sidelink communication on the shared frequency band by the terminal can be improved, and the congestion problem of the authorized spectrum can be relieved.

It should be noted that, when the terminal performs Sidelink communication in the shared frequency band, the LBT bandwidth may be set as a sub-channel to perform the Sidelink communication of the terminal, and thus, the transmission resource available for the Sidelink communication may be implicitly indicated by directly using the first-stage SCI.

Optionally, when the target rule includes the first rule, the determining, according to the target rule, the target transmission resource of the resource pool located in the shared frequency band includes:

if the LBT monitoring result of each LBT bandwidth in the resource pool is successful, determining that each LBT bandwidth in the resource pool can be used for the terminal to carry out Sidelink communication;

and/or the presence of a gas in the gas,

if the LBT monitoring results corresponding to the LBT bandwidths in the resource pool all fail, determining that the LBT bandwidths in the resource pool can not be used for the terminal to perform Sidelink communication;

and/or the presence of a gas in the gas,

if the LBT monitoring result of part of LBT bandwidths in the resource pool is successful or failed, determining that the LBT bandwidths successfully monitored in the resource pool can be used for the terminal to carry out Sidelink communication, and determining that the LBT bandwidths failed in the resource pool are not used for the terminal to carry out Sidelink communication; or, if the LBT monitoring result of a part of LBT bandwidths in the resource pool is successful or failed, determining that each LBT bandwidth in the resource pool can be used for the terminal to perform Sidelink communication under the condition that the ratio of the total size of LBT bandwidths successfully monitored in the resource pool to the size of the resource pool is not less than a preset threshold; or, if the LBT monitoring result of the partial LBT bandwidth in the resource pool is successful or failed, determining that the LBT bandwidth successful in LBT monitoring in the resource pool is available for the terminal to perform sildelink communication and determining that the LBT bandwidth failed in LBT monitoring in the resource pool is not available for the terminal to perform sildelink communication under the condition that the ratio of the total size of the LBT bandwidth successful in LBT monitoring in the resource pool to the size of the resource pool is not less than a preset threshold; or, if the LBT monitoring result of a part of LBT bandwidths in the resource pool succeeds or fails, determining that each LBT bandwidth in the resource pool is not available for the terminal to perform Sidelink communication.

In this embodiment, the terminal may determine, according to the LBT monitoring result of each LBT bandwidth in the resource pool, a transmission resource that can be used for Sidelink communication in the resource pool.

Case 1: if the LBT monitoring results corresponding to each LBT bandwidth in the resource pool are successful, the whole resource pool can be used for transmission.

Case 2: and if the LBT monitoring results corresponding to each LBT bandwidth in the resource pool all fail, the whole resource pool cannot be used for transmission.

Case 3: if the LBT monitoring result corresponding to a part of LBT bandwidths in the resource pool succeeds or fails, that is, LBT monitoring corresponding to a part of LBT bandwidths succeeds, LBT monitoring corresponding to another part of LBT bandwidths fails, for example, the resource pool includes 5 LBT bandwidths, which are LBT bandwidth 1, LBT bandwidth 2, LBT bandwidth 3, LBT bandwidth 4, and LBT bandwidth 5, respectively, LBT monitoring corresponding to LBT bandwidth 1, LBT bandwidth 3, LBT bandwidth 4, and LBT bandwidth 5 succeeds, and LBT monitoring corresponding to LBT bandwidth 2 fails, in this case, LBT bandwidth available for the terminal to perform sildenk communication in the resource pool may be determined in at least one of the following manners.

1) Only LBT bandwidth successfully monitored by LBT can be used for transmission;

2) when the ratio of the total size of LBT bandwidth successfully monitored by LBT to the size of the resource pool is not less than, i.e. greater than or equal to, the preset threshold, in an optional embodiment, it is determined that the entire resource pool can be used for transmission, so that the resource utilization rate can be improved. In another alternative embodiment, it is determined that only LBT bandwidth for which LBT monitoring was successful can be used for transmission. The preset threshold may be set according to actual conditions, for example, set to 90%, and is not specifically limited herein.

3) The entire pool of resources cannot be used for transmission.

In this embodiment, when the size of the resource pool is larger than the size of the LBT bandwidth, the terminal determines the LBT bandwidth that can be used for the terminal to perform the sildelink communication, so that the problem of determining the terminal transmission resource due to the LBT mechanism in the SL system can be solved, the transmission behavior of the terminal in the SL system is prevented from being affected, the reliability of the terminal performing the sildelink communication in the shared frequency band is improved, and the congestion problem of the authorized spectrum is alleviated.

Optionally, when the LBT monitoring result of a part of LBT bandwidths in the resource pool is successful or failed, and the LBT bandwidths that are successfully monitored by LBT in the resource pool are available for the terminal to perform the Sidelink communication, the LBT bandwidths for the terminal to perform the Sidelink communication need to be continuous in frequency domain.

Optionally, the method further includes:

based on the first information, adjusting target transmission resources which can be used for the terminal to perform the Sildelink communication in the resource pool;

the first information includes at least one of:

channel state information, CSI;

a channel busy rate CBR;

a channel occupancy rate CR;

quality of service, QoS;

a resource selection mode;

a coverage status;

a type of transmission;

a hybrid automatic repeat request, HARQ, type;

a transmission priority;

the type of service.

In this embodiment, when the size of the resource pool is larger than the size of the LBT bandwidth, the terminal may perform policy switching according to at least one of Channel State Information (CSI), Channel Busy Rate (CBR), Channel Occupancy rate (CR), Quality of Service (QoS), resource selection manner, coverage State, transmission type (cast type), Hybrid Automatic Repeat Request (HARQ) type, transmission priority, and Service type, so as to adjust a target transmission resource in the resource pool, which can be used for the terminal to perform Sidelink communication.

For example, if the LBT monitoring results corresponding to each LBT bandwidth in the resource pool are successful, when the CSI reflects that the current channel quality is better, or the CBR reflects that the channel is not busy, a policy "the whole resource pool can be used for transmission" may be adopted to specify the transmission resources used by the terminal for performing the Sidelink communication in the resource pool located in the shared frequency band. When the CSI reflects poor quality of the current channel or the CBR reflects busy channel, the policy may be switched to determine that the entire resource pool is unavailable for transmission.

In this embodiment, the target transmission resource available for the terminal to perform the Sidelink communication in the resource pool is adjusted based on the first information. Therefore, reliability and flexibility of the Sidelink communication on the shared frequency band can be improved.

Referring to fig. 2, fig. 2 is a second schematic flow chart of the Sidelink transmission method provided in the embodiment of the present application, and as shown in fig. 2, the method includes the following steps:

step 201, sending second information, where the second information is used to indicate at least one of an LBT status corresponding to the resource pool and a channel occupancy time COT for the terminal to perform Sidelink communication in the resource pool, and the LBT status is used to characterize an LBT monitoring result corresponding to the resource pool;

wherein the second information comprises at least one of:

first level sidelink control information SCI;

second level SCI.

In this embodiment, the terminal determines how to perform the LBT indication, and the terminal may perform the LBT indication through first-level Sidelink Control Information (SCI) and/or second-level SCI, and send second information carrying the LBT indication information to other terminals and/or network-side devices, where the LBT indication may include an LBT status corresponding to a resource pool and/or an indication of channel occupation time, so as to preempt frequency domain resources located in a shared frequency band.

The first level SCI may be SCI format1-A or a newly defined first level SCI, and the second level SCI may be SCI format2-A, SCI format 2-B or a newly defined second level SCI.

The indication of LBT status corresponding to the resource pool may include:

integrally indicating the LBT monitoring result of the resource pool under the condition that the size of the resource pool is not larger than the size of the LBT bandwidth;

and/or the presence of a gas in the gas,

when the size of the resource pool is larger than that of the LBT bandwidth, integrally indicating the LBT monitoring result of the resource pool; or, in case the size of the resource pool is larger than the size of the LBT bandwidth, indicating the LBT monitoring result of each LBT bandwidth in the resource pool.

In this embodiment, the terminal determines how to perform the LBT indication and sends the second information carrying the LBT indication information, so that preemption of the spectrum resources in the shared frequency band can be achieved, reliability of the terminal performing the Sidelink communication on the shared frequency band is improved, and a congestion problem of the authorized spectrum can be alleviated.

Optionally, the method further comprises any one of:

if the second information comprises a first-level SCI, indicating target LBT state information based on reserved indication information of an indication domain in the first-level SCI, wherein the reserved indication information is used for indicating a second-level SCI format, the target LBT state information is used for indicating that a target monitoring result is completely successful or partially successful, and the target monitoring result comprises an LBT monitoring result of each LBT bandwidth in the resource pool or the resource pool;

if the second information includes a first-level SCI, indicating an LBT status of each LBT bandwidth in the resource pool based on a first target bit in the first-level SCI, wherein the first target bit is located in: at least one of a frequency domain resource allocation indication field, a time domain resource allocation indication field, and a newly added first indication field, where in the case that the first-level SCI includes the target indication field, the first target bit is located at: a second indication domain newly added in the first-stage SCI, wherein the target indication domain is used for indicating the reserved frequency domain resources of the terminal, so that the terminal can perform Sidelink communication based on the reserved frequency domain resources;

if the second information includes a first-stage SCI, indicating, based on a frequency domain resource allocation indication field in the first-stage SCI, an LBT status of each LBT bandwidth in the resource pool when the first-stage SCI includes the target indication field and the LBT bandwidth for the terminal to perform Sidelink communication in the resource pool needs frequency domain continuity, where LBT bandwidth information that LBT monitoring is successful is: any one of the frequency domain resource with the largest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the frequency domain resource with the smallest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the union of the reserved frequency domain resources indicated by the first-stage SCI, and the intersection of the reserved frequency domain resources indicated by the first-stage SCI;

if the second information includes a second-level SCI, indicating an LBT status of each LBT bandwidth in the resource pool based on a second target bit in the second-level SCI, where the second target bit is located: a third indicator domain in the second-level SCI.

Optionally, in a case that the second information includes a first-level SCI and indicates, based on a first target bit in the first-level SCI, an LBT status of each LBT bandwidth in the resource pool, the first target bit satisfies at least one of the following:

when the LBT bandwidth of the terminal for performing the Sidelink communication in the resource pool needs to be continuous in frequency domain, the bit number for indicating the LBT state of each LBT bandwidth is equal to

Under the condition that the LBT bandwidth of the terminal for performing Sidelink communication in the resource pool does not need frequency domain continuity, the bit number used for indicating the LBT state of each LBT bandwidth in the resource pool is N;

wherein N is the number of LBT bandwidths in the resource pool; or,

in a case that the second information includes a second-level SCI and indicates, based on a second target bit in the second-level SCI, an LBT status of each LBT bandwidth in the resource pool, the second target bit satisfies at least one of:

indicating that the LBT bandwidth of the terminal for the Sidelink communication in the resource pool needs to be continuous in frequency domainThe number of bits of the LBT status of each LBT bandwidth is

wherein N is the number of LBT bandwidths in the resource pool.

In the present embodiment, the mode 1: the LBT monitoring results of the resource pool may be indicated as a whole.

In manner 1, target LBT status information for indicating LBT monitoring results of the resource pool as a whole may be indicated based on reservation indication information of an indication field in the first-level SCI for indicating a second-level SCI format.

In an alternative embodiment, table 1 is an indication field information table for indicating the second-level SCI format in the first-level SCI and indicating the LBT status, and the indication field for indicating the second-level SCI format is represented by Value of2nd-stage SCI format field, as shown in table 1, two indication information are reserved in the indication field for indicating the second-level SCI format in the first-level SCI, which are respectively the information indicated when the indication field is 10 and 11.

When the LBT monitoring result of the resource pool or the LBT monitoring result of each LBT bandwidth in the resource pool is completely successful, the Value of2nd-stage SCI format field in SCI format1-A can be set to 10; when the LBT monitoring result of the resource pool or the LBT monitoring result part of each LBT bandwidth in the resource pool is successful, the Value of2nd-stage SCI format field in SCI format1-A is set to 11.

Table 1 is a table of indication field information for indicating the format of the second-level SCI and indicating the LBT status in the first-level SCI

In another alternative embodiment, when the LBT monitoring result of the resource pool or the LBT monitoring result of each LBT bandwidth in the resource pool is all successful, the Value of2nd-stage SCI format field in SCI format1-a may be set to 11; when the LBT monitoring result of the resource pool or the LBT monitoring result part of each LBT bandwidth in the resource pool is successful, the Value of2nd-stage SCI format field in SCI format1-A is set to 10.

It should be noted that, when all of the LBT monitoring results of the resource pool or the LBT monitoring results of each LBT bandwidth in the resource pool fail, the Sidelink communication is not performed, so that the LBT instruction may not be performed.

Mode 2: in the case that the size of the resource pool is larger than the size of the LBT bandwidth, an LBT monitoring result corresponding to each LBT bandwidth may be indicated, where the number of LBT bandwidths in the resource pool is N.

In an alternative embodiment, the LBT monitoring result corresponding to each LBT bandwidth may be indicated by the first-level SCI (SCI format 1-a).

Optionally, in the case that SCI format1-a does not include the target indication field and the LBT bandwidth for transmission needs to be continuous in frequency domain, the first target bit in the first-level SCI may be utilized to indicate the LBT status of each LBT bandwidth in the resource pool. Wherein the first target bit may be located in at least one of a frequency domain resource allocation indication field, a time domain resource allocation indication field, and a first indication field newly added in SCI format 1-a. The target indication field is used for indicating the frequency domain resources reserved by the terminal, so that the terminal can perform Sidelink communication based on the reserved frequency domain resources, that is, the SCI format1-a cannot perform reservation of the frequency domain resources, that is, does not perform resource reservation.

That is, the first target bit may be a bit in the frequency domain resource allocation indication field or a bit in the time domain resource allocation indication field; alternatively, the first target bits may include at least some bits in a frequency domain resource allocation indication field and a time domain resource allocation indication field; alternatively, the first target bit may be a reserved bit in the first indication field, and the like, and is not particularly limited herein.

In the case that the LBT bandwidth for transmission needs to be continuous in the frequency domain, the number of bits corresponding to the first target bit may be

The LBT status of each LBT bandwidth in the resource pool may be indicated by indicating an LBT bandwidth initially available for transmission and a number of LBT bandwidths consecutively available for transmission. For example, the LBT status indicating LBT bandwidth 3, LBT bandwidth 4, and LBT bandwidth 5 that are available for transmission may indicate that the starting LBT bandwidth available for transmission is LBT bandwidth 3 and the number of LBT bandwidths available for transmission is 3.

For example, when N is 5, i.e. the resource pool corresponds to 5 LBT bandwidths, the bit number corresponding to the first target bit is passed

And the number is 4. The terminal may determine, based on the LBT status of each LBT bandwidth in the resource pool, a bit value of the first target bit by using a mapping relationship between a bit value corresponding to the bit number and the LBT status, which is obtained in advance, so as to indicate the LBT status of each LBT bandwidth in the resource pool. For example, when it is required to indicate that the initial LBT bandwidth available for transmission is LBT bandwidth 3 and the number of LBT bandwidths available for transmission is 3 consecutively, the mapping relationship is used to determine that the bit value of the first target bit is "XXXX".

Optionally, in a case that SCI format1-a does not include the target indication field and the LBT bandwidth used for transmission does not need frequency domain continuity, the first target bit in the first-level SCI may be utilized to indicate the LBT status of each LBT bandwidth in the resource pool. Wherein the first target bit may be located in at least one of a frequency domain resource allocation indication field, a time domain resource allocation indication field, and a first indication field newly added in SCI format 1-a.

In a case that the LBT bandwidth used for transmission does not need to be continuous in the frequency domain, the bit number corresponding to the first target bit may be N, and the LBT monitoring result of the LBT bandwidth may be indicated in a manner that one bit indicates the LBT monitoring result of one LBT bandwidth. For example, when the LBT monitoring of the LBT bandwidth is successful, the indication bit corresponding to the LBT bandwidth is set to 1, and when the LBT monitoring of the LBT bandwidth is failed, the indication bit corresponding to the LBT bandwidth is set to 0.

Optionally, in a case that SCI format1-a includes a target indication field, that is, SCI format1-a may indicate reserved frequency domain resources, and LBT bandwidths for transmission do not need frequency domain continuity, an LBT status of each LBT bandwidth in the resource pool may be indicated based on a first target bit in the first-level SCI. Wherein the first target bit is located at: a second indicator field newly added in the first level SCI. For example, the reserved bits in the second indication field newly added in the first-level SCI may be used to indicate the LBT status of each LBT bandwidth in the resource pool.

Optionally, when the SCI format1-a includes the target indication field, that is, the SCI format1-a may indicate the reserved frequency domain resources, and the LBT bandwidth used for transmission needs to be frequency domain contiguous, the LBT status of each LBT bandwidth in the resource pool may be implicitly indicated based on the frequency domain resource allocation indication field in the first-level SCI.

At this time, the size of the LBT bandwidth is (pre) configured as a subchannel, and LBT bandwidth information of LBT monitoring success is: any one of the frequency domain resource with the largest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the frequency domain resource with the smallest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the union of the reserved frequency domain resources indicated by the first-stage SCI, and the intersection of the reserved frequency domain resources indicated by the first-stage SCI.

For example, when the first-stage SCI indicates to reserve two additional frequency domain resources through the target indication domain, if it indicates that bandwidth 1 corresponds to a frequency domain resource in a frequency domain range and bandwidth 3, and bandwidth 4 and bandwidth 5 correspond to a frequency domain resource in a frequency domain range, bandwidth 3, bandwidth 4 and bandwidth 5 may be implicitly indicated as an LBT bandwidth for which LBT monitoring succeeds (i.e., LBT bandwidth information for which LBT monitoring succeeds is a frequency domain resource for which a corresponding frequency domain range in the reserved frequency domain resources is the largest), or bandwidth 1 may be an LBT bandwidth for which LBT monitoring succeeds (i.e., LBT bandwidth information for which LBT monitoring succeeds is a frequency domain resource for which a corresponding frequency domain range in the reserved frequency domain resources is the smallest), or bandwidth 1, bandwidth 3, bandwidth 4 and bandwidth 5 may be implicitly indicated as an LBT bandwidth for which LBT monitoring succeeds (i.e., LBT bandwidth information for which LBT monitoring succeeds is a union of the reserved frequency domain resources).

For another example, when the first-stage SCI indicates to reserve two additional frequency domain resources through the target indication domain, if the frequency domain resource in the frequency domain range corresponding to the bandwidth 1 and the frequency domain resource in the frequency domain range corresponding to the bandwidth 1, and the bandwidth 2 and the bandwidth 3, the bandwidth 1, the bandwidth 2 and the bandwidth 3 may be implicitly indicated as the LBT bandwidth for which LBT monitoring is successful, or the bandwidth 1 is the LBT bandwidth for which LBT monitoring is successful.

For another example, when the first-stage SCI indicates, through the target indication field, that two additional frequency domain resources are reserved, for example, frequency domain resources in a frequency domain range corresponding to bandwidth 3 and bandwidth 4 and frequency domain resources in a frequency domain range corresponding to bandwidth 1, bandwidth 2, and bandwidth 3, the first-stage SCI may implicitly indicate that bandwidth 3 is an LBT bandwidth for which LBT monitoring succeeds (i.e., LBT bandwidth information for which LBT monitoring succeeds is an intersection of reserved frequency domain resources).

In another alternative embodiment, the LBT monitoring result corresponding to each LBT bandwidth may be indicated by the second-level SCI.

Optionally, the LBT status of each LBT bandwidth in the resource pool may be indicated based on a second target bit in the second-level SCI, and the second target bit may be located at: a third indicator domain in the second-level SCI. For example, the reserved bits in the third indication field in the second-level SCI may be used to indicate the LBT status of each LBT bandwidth in the resource pool, and the bit number corresponding to the second target bit is set to be M.

In case the LBT bandwidth for transmission needs to be contiguous in the frequency domain,

In the case that the LBT bandwidth for transmission does not need frequency domain continuity, M ═ N, the LBT monitoring result of the LBT bandwidth may be indicated in a manner that one bit indicates the LBT monitoring result of one LBT bandwidth. For example, when the LBT monitoring of the LBT bandwidth is successful, the indication bit corresponding to the LBT bandwidth is set to 1, and when the LBT monitoring of the LBT bandwidth is failed, the indication bit corresponding to the LBT bandwidth is set to 0.

Alternatively, the second-level SCI may be SCI format2-A, SCI format 2-B, or a newly defined second-level SCI.

In this embodiment, how the terminal indicates the LBT status corresponding to the resource pool or the LBT status corresponding to each LBT bandwidth in the resource pool based on the first-level SCI and/or the second-level SCI is determined, so that the related behavior of the terminal during the sildelink communication on the shared frequency band can be determined, the reliability of the sildelink communication performed on the shared frequency band by the terminal can be further improved, and the congestion problem of the authorized spectrum can be alleviated.

Optionally, the method further comprises any one of:

if the second information comprises the first-level SCI, indicating the terminal in the resource pool to perform COT of Sidelink communication based on reserved indication information of an indication domain in the first-level SCI, wherein the reserved indication information is used for indicating the format of the second-level SCI;

if the second information comprises the first-level SCI, indicating the terminal in the resource pool to carry out COT of the Sidelink communication based on a newly added fourth indication domain in the first-level SCI;

and if the second information comprises a second-level SCI, indicating the terminal in the resource pool to carry out COT of the Sildelink communication based on a fifth indication domain in the second-level SCI.

In this embodiment, the COT may be obtained by at least one of:

configuring network side equipment;

pre-configuring;

other terminal indications;

the terminal decides itself.

In an optional embodiment, the terminal in the resource pool may be instructed to perform COT of Sidelink communication through the first-level SCI.

Optionally, the COT for performing Sidelink communication by the terminal in the resource pool may be indicated based on the reservation indication information in the indication field used for indicating the format of the second-level SCI in the first-level SCI. Table 2 is an indication field information table for indicating the second-level SCI format in the first-level SCI and indicating COT, wherein the indication field for indicating the second-level SCI format is represented by Value of2nd-stage SCI format field, as shown in table 2, two indication information are reserved in the indication field for indicating the second-level SCI format in the first-level SCI, which are respectively the information indicated when the indication field is 10 and 11.

Setting the Value of2nd-stage SCI format field in SCI format1-A to 10 when the channel occupation time is X; when the channel occupation time is Y, the Value of2nd-stage SCI format field in SCI format1-A is set to 11.

Table 2 is a table of indication field information in the first level SCI for indicating the format of the second level SCI and indicating COT

Value of 2nd-stage SCI format field	Second level SCI format
		00	SCI format 2-A
01	SCI format 2-B
		10	X
11	Y

In another optional embodiment, the terminal in the resource pool may be instructed to perform COT of Sidelink communication based on a fourth indication field newly added in the first-stage SCI. For example, the reserved bits in the fourth indication field newly added in the first-stage SCI may be used to indicate the COT for the Sidelink communication performed by the terminal in the resource pool, the number of bits corresponding to the indication COT may be R, and R may be set according to an actual situation, as shown in table 3, where table 3 is a COT indication table when R is 1.

COT indicator when R is 1

Indicating the value of the COT bit in the fourth indication field	COT
		0	5ms
1	10ms

In yet another alternative embodiment, the COT for the Sidelink communication performed by the terminal in the resource pool may be indicated based on a fifth indication field in the second-level SCI. For example, the reserved bits in the fifth indication field in the second-level SCI may be used to indicate the COT for the Sidelink communication performed by the terminal in the resource pool, the number of bits corresponding to the indication COT may be S, and S may be set according to an actual situation, as shown in table 4, where table 4 is a COT indication table when S is equal to 1.

COT indicator when S is 1

Indicating the value of the COT bit in the fifth indication field	COT
		0	5ms
1	10ms

In this embodiment, how the terminal indicates the COT for the Sidelink communication performed by the terminal in the resource pool based on the first-level SCI and/or the second-level SCI is determined, so that the relevant behavior of the terminal when performing the Sidelink communication on the shared frequency band can be determined, the reliability of performing the Sidelink communication on the shared frequency band by the terminal can be further improved, and the congestion problem of the authorized spectrum can be alleviated.

In the Sidelink transmission method provided in the embodiment of the present application, the execution main body may be a Sidelink transmission device. In the embodiment of the present application, a method for implementing a Sidelink transmission by a Sidelink transmission apparatus is taken as an example, and the Sidelink transmission apparatus provided in the embodiment of the present application is described.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a Sidelink transmission apparatus provided in an embodiment of the present application, and as shown in fig. 3, the apparatus includes:

a determining module 301, configured to determine, according to a target rule, a target transmission resource of a resource pool located in a shared frequency band, where the target transmission resource is used for the terminal to perform Sidelink communication;

Optionally, in a case that the target rule includes a first rule, the determining module 301 is specifically configured to:

if the LBT monitoring result of each LBT bandwidth in the resource pool is successful, determining that each LBT bandwidth in the resource pool can be used for the terminal to perform Sidelink communication; and/or the presence of a gas in the gas,

if the LBT monitoring results corresponding to the LBT bandwidths in the resource pool all fail, determining that the LBT bandwidths in the resource pool can not be used for the terminal to perform Sidelink communication; and/or the presence of a gas in the gas,

if the LBT monitoring result of part of LBT bandwidths in the resource pool is successful or failed, determining that the LBT bandwidth which is successfully monitored in the resource pool can be used for the terminal to perform Sidelink communication, and determining that the LBT bandwidth which is failed in the LBT monitoring in the resource pool is not used for the terminal to perform Sidelink communication; or,

if the LBT monitoring result of part of LBT bandwidths in the resource pool is successful or failed, determining that each LBT bandwidth in the resource pool can be used for the terminal to perform sildelink communication under the condition that the ratio of the total size of LBT bandwidths successfully monitored in the resource pool to the size of the resource pool is not less than a preset threshold value; or the like, or a combination thereof,

if the LBT monitoring result of the partial LBT bandwidth in the resource pool is successful or failed, determining that the LBT bandwidth successfully monitored in the resource pool can be used for the terminal to perform sildelink communication and determining that the LBT bandwidth failed to monitor in the resource pool is not used for the terminal to perform the sildelink communication under the condition that the ratio of the total size of the LBT bandwidth successfully monitored in the resource pool to the size of the resource pool is not smaller than a preset threshold value; or,

and if the LBT monitoring result of part of LBT bandwidths in the resource pool succeeds or fails, determining that each LBT bandwidth in the resource pool cannot be used for the terminal to carry out Sidelink communication.

Optionally, the apparatus further comprises:

an adjusting module, configured to adjust a target transmission resource, which is available for the terminal to perform Sidelink communication, in the resource pool based on the first information;

the first information includes at least one of:

channel state information, CSI;

a channel busy rate CBR;

a channel occupancy rate CR;

quality of service, QoS;

a resource selection mode;

a coverage status;

a transmission type;

a hybrid automatic repeat request, HARQ, type;

a transmission priority;

the type of service.

Optionally, the resource pool and/or LBT bandwidth is determined by at least one of:

configuring network side equipment;

pre-configuring;

other terminal indications;

the terminal decides itself.

Optionally, the apparatus further comprises:

a sending module, configured to send second information, where the second information is used to indicate at least one of an LBT status corresponding to the resource pool and a channel occupancy time COT for a Sidelink communication performed by the terminal in the resource pool, and the LBT status is used to characterize an LBT monitoring result corresponding to the resource pool;

wherein the second information comprises at least one of:

first level sidelink control information SCI;

second level SCI.

Optionally, the apparatus further comprises:

a first indicating module, configured to indicate target LBT status information based on reserved indication information in an indication field of a second-level SCI format in the first-level SCI if the second information includes a first-level SCI, where the target LBT status information is used to indicate that a target monitoring result is completely or partially successful, and the target monitoring result includes LBT monitoring results of LBT bandwidths in the resource pool or the resource pool;

a second indicating module, configured to indicate, based on a first target bit in the first-level SCI, an LBT status of each LBT bandwidth in the resource pool if the second information includes the first-level SCI, where the first target bit is located, under a condition that the first-level SCI does not include a target indication field: at least one of a frequency domain resource allocation indication field, a time domain resource allocation indication field, and a newly added first indication field, where in the case that the first-level SCI includes the target indication field, the first target bit is located at: a second indication domain newly added in the first-stage SCI, wherein the target indication domain is used for indicating the reserved frequency domain resources of the terminal, so that the terminal can perform Sidelink communication based on the reserved frequency domain resources;

a third indication module, configured to, if the second information includes a first-stage SCI, indicate, based on a frequency-domain resource allocation indication field in the first-stage SCI, an LBT status of each LBT bandwidth in the resource pool when the first-stage SCI includes the target indication field and the LBT bandwidth for the terminal to perform Sidelink communication in the resource pool needs frequency-domain continuity, where the LBT bandwidth successfully monitored by LBT is, when the LBT bandwidth is a subchannel, LBT bandwidth information is: any one of the frequency domain resource with the largest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the frequency domain resource with the smallest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-stage SCI, the union of the reserved frequency domain resources indicated by the first-stage SCI, and the intersection of the reserved frequency domain resources indicated by the first-stage SCI;

a fourth indicating module, configured to indicate, based on a second target bit in the second-level SCI, an LBT status of each LBT bandwidth in the resource pool if the second information includes the second-level SCI, where the second target bit is located: a third indicator domain in the second-level SCI.

wherein N is the number of LBT bandwidths in the resource pool; or,

wherein N is the number of LBT bandwidths in the resource pool.

Optionally, the method further comprises any one of:

Optionally, the LBT bandwidth is set as a subchannel to perform the Sidelink communication of the terminal.

The Sidelink transmission apparatus in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal.

The Sidelink transmission device provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 1 and fig. 2, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, as shown in fig. 4, an embodiment of the present application further provides a communication device 400, which includes a processor 401 and a memory 402, where the memory 402 stores a program or instructions that can be executed on the processor 401, for example, when the program or instructions are executed by the processor 401, the steps of the method embodiments in fig. 1 and fig. 2 are implemented, and the same technical effect can be achieved.

The embodiment of the present application further provides a terminal, including a processor and a communication interface, where the processor is configured to determine, according to a target rule, a target transmission resource of a resource pool located in a shared frequency band, where the target transmission resource is used for the terminal to perform Sidelink communication, and the communication interface is configured to send second information, where the second information is used to indicate at least one of an LBT status corresponding to the resource pool and a channel occupancy time COT for the terminal to perform the Sidelink communication in the resource pool, and the LBT status is used to characterize an LBT monitoring result corresponding to the resource pool. The terminal embodiment corresponds to the method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 5 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

The terminal 500 includes but is not limited to: at least some of the radio frequency unit 501, the network module 502, the audio output unit 503, the input unit 504, the sensor 505, the display unit 506, the user input unit 507, the interface unit 508, the memory 509, and the processor 510.

Those skilled in the art will appreciate that the terminal 500 may further include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 510 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 5 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or may combine some components, or may be arranged differently, and thus, the description thereof is omitted.

It should be understood that, in the embodiment of the present application, the input Unit 504 may include a Graphics Processing Unit (GPU) 5041 and a microphone 5042, and the Graphics processor 5041 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 507 includes at least one of a touch panel 5071 and other input devices 5072. A touch panel 5071, also referred to as a touch screen. The touch panel 5071 may include two parts of a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in further detail herein.

In this embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 501 may transmit the downlink data to the processor 510 for processing; in addition, the radio frequency unit 501 may send uplink data to the network side device. In general, radio frequency unit 501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 509 may be used to store software programs or instructions as well as various data. The memory 509 may mainly include a first storage area storing a program or an instruction and a second storage area storing data, wherein the first storage area may store an operating system, an application program or an instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 509 may include volatile memory or non-volatile memory, or the memory 509 may include both volatile and non-volatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM), a Static Random Access Memory (Static RAM, SRAM), a Dynamic Random Access Memory (Dynamic RAM, DRAM), a Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), a Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, ddr SDRAM), an Enhanced Synchronous SDRAM (ESDRAM), a Synchronous Link DRAM (SLDRAM), and a Direct bus RAM (DRRAM). The memory 509 in the embodiments of the subject application includes, but is not limited to, these and any other suitable types of memory.

Processor 510 may include one or more processing units; optionally, the processor 510 integrates an application processor, which mainly handles operations related to the operating system, user interface, and applications, and a modem processor, which mainly handles wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 510.

The terminal provided in the embodiment of the present application can implement each process implemented in the method embodiments of fig. 1 and fig. 2, and achieve the same technical effect, and is not described here again to avoid repetition.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the method embodiments in fig. 1 and fig. 2, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read only memory ROM, a random access memory RAM, a magnetic or optical disk, and the like.

An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the method embodiments in fig. 1 and fig. 2, and can achieve the same technical effect, and details are not repeated here to avoid repetition.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

An embodiment of the present application further provides a computer program product, where the computer program product is stored in a storage medium, and the computer program product is executed by at least one processor to implement the processes of the method embodiments in fig. 1 and fig. 2, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A Sidelink Sidelink transmission method is applied to a terminal and is characterized by comprising the following steps:

2. The method of claim 1, wherein in case that the target rule includes a first rule, the determining the target transmission resource of the resource pool located in the shared frequency band according to the target rule comprises:

if the LBT monitoring result of each LBT bandwidth in the resource pool is successful, determining that each LBT bandwidth in the resource pool can be used for the terminal to perform Sidelink communication;

and/or the presence of a gas in the gas,

if the LBT monitoring result of part of LBT bandwidths in the resource pool is successful or failed, determining that the LBT bandwidth which is successfully monitored in the resource pool can be used for the terminal to perform Sidelink communication, and determining that the LBT bandwidth which is failed in the LBT monitoring in the resource pool is not used for the terminal to perform Sidelink communication; or, if the LBT monitoring result of a part of LBT bandwidths in the resource pool is successful or failed, determining that each LBT bandwidth in the resource pool can be used for the terminal to perform Sidelink communication under the condition that the ratio of the total size of LBT bandwidths successfully monitored in the resource pool to the size of the resource pool is not less than a preset threshold; or, if the LBT monitoring result of the partial LBT bandwidth in the resource pool is successful or failed, determining that the LBT bandwidth successful in LBT monitoring in the resource pool is available for the terminal to perform sildelink communication and determining that the LBT bandwidth failed in LBT monitoring in the resource pool is not available for the terminal to perform sildelink communication under the condition that the ratio of the total size of the LBT bandwidth successful in LBT monitoring in the resource pool to the size of the resource pool is not less than a preset threshold; or, if the LBT monitoring result of a part of LBT bandwidths in the resource pool succeeds or fails, determining that each LBT bandwidth in the resource pool is not available for the terminal to perform Sidelink communication.

3. The method of claim 2, wherein if LBT monitoring results of a part of LBT bandwidths in the resource pool are successful or failed, and an LBT bandwidth in the resource pool for which LBT monitoring is successful is available for the terminal to perform sildenk communication, the LBT bandwidth for the terminal to perform sildenk communication needs to be contiguous in frequency domain.

4. The method of claim 2, further comprising:

the first information includes at least one of:

channel state information, CSI;

a channel busy rate CBR;

a channel occupancy rate CR;

quality of service, QoS;

a resource selection mode;

a coverage status;

a transmission type;

a hybrid automatic repeat request, HARQ, type;

a transmission priority;

the type of service.

5. The method of claim 1, wherein the resource pool and/or LBT bandwidth is determined by at least one of:

configuring network side equipment;

pre-configuring;

other terminal indications;

the terminal decides itself.

6. The method of claim 1, further comprising:

sending second information, where the second information is used to indicate at least one of an LBT status corresponding to the resource pool and a channel occupancy time, COT, of the terminal in the resource pool for performing Sidelink communication, and the LBT status is used to characterize an LBT monitoring result corresponding to the resource pool;

wherein the second information comprises at least one of:

first level sidelink control information SCI;

second level SCI.

7. The method of claim 6, further comprising any of:

if the second information includes a first-level SCI, indicating, based on a first target bit in the first-level SCI, an LBT status of each LBT bandwidth in the resource pool, where the first target bit is located, when a target indication field is not included in the first-level SCI: at least one of a frequency domain resource allocation indication field, a time domain resource allocation indication field, and a newly added first indication field, where in the case that the first-level SCI includes the target indication field, the first target bit is located at: a second indication domain newly added in the first-stage SCI, wherein the target indication domain is used for indicating the reserved frequency domain resources of the terminal, so that the terminal can perform Sidelink communication based on the reserved frequency domain resources;

if the second information includes a first-stage SCI, indicating, based on a frequency domain resource allocation indication field in the first-stage SCI, an LBT status of each LBT bandwidth in the resource pool when the first-stage SCI includes the target indication field and the LBT bandwidth for the terminal to perform Sidelink communication in the resource pool needs frequency domain continuity, where LBT bandwidth information that LBT monitoring is successful is: any one of the frequency domain resource with the largest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-level SCI, the frequency domain resource with the smallest corresponding frequency domain range in the reserved frequency domain resources indicated by the first-level SCI, the union of the reserved frequency domain resources indicated by the first-level SCI, and the intersection of the reserved frequency domain resources indicated by the first-level SCI;

8. The method of claim 7 wherein, if the second information includes a first level SCI and the LBT status of each LBT bandwidth in the resource pool is indicated based on a first target bit in the first level SCI, the first target bit satisfies at least one of:

wherein N is the number of LBT bandwidths in the resource pool;

or,

when the LBT bandwidth for the terminal to perform Sidelink communication in the resource pool needs frequency domain continuity, the bit number for indicating the LBT status of each LBT bandwidth is set as

wherein N is the number of LBT bandwidths in the resource pool.

9. The method of claim 6, further comprising any of:

10. The method of claim 1, further comprising:

and setting the LBT bandwidth as a subchannel to carry out Sidelink communication of the terminal.

11. A Sidelink transmission apparatus is applied to a terminal, and comprises:

the second rule is: under the condition that the size of the resource pool is smaller than or equal to the size of an LBT bandwidth, if LBT monitoring of the resource pool is successful, determining that the resource pool can be used for the terminal to carry out Sidelink communication;

12. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions when executed by the processor implementing the steps of the Sidelink transmission method as claimed in any one of claims 1 to 10.

13. A readable storage medium, storing thereon a program or instructions which, when executed by a processor, implements the Sidelink transmission method as claimed in any one of claims 1 to 10.