WO2022077520A1 - Method and device for communication - Google Patents

Abstract

Provided in the present application are a method and device for communication. The method comprises: a terminal device determines first resources in a resource selection window corresponding to an unmonitored slot in a resource monitoring window; the terminal device determines, on the basis of a first threshold of the first resources or a second threshold of a candidate resource set corresponding to the resource selection window, second resources in the candidate resource set, where the first threshold is used for expressing a threshold for the number of first resources, the second threshold is used for expressing a threshold for the number of remaining resources in the candidate resource set when the first resources are excluded, and the second resources are used for transmitting sidelink data and/or slidelink control information. Compared with the prior art, the present application avoids, in a resource selection process, the exclusion of an excessive amount of resources leading to reserved candidate resources not meeting a criterion on the proportion of candidate resources submitted to a high level.

Description

Communication method and device technical field

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

Background technique

Under the long term evolution (LTE) technology network proposed by the 3rd generation partnership project (3GPP), the vehicle-to-everything (V2X) vehicle networking technology It is proposed that V2X communication refers to the communication between vehicles and anything in the outside world, including vehicle-to-vehicle communication (V2V), vehicle-to-pedestrian communication (V2P), vehicle-to-infrastructure communication ( vehicle to infrastructure, V2I), vehicle to network communication (vehicle to network, V2N).

When V2X communication is performed, the terminal equipment on the vehicle needs to allocate the resources of the sidelink. The resource allocation of sidelink includes station allocation resource mode (mode-1) and user-selected resource mode (mode-2). In the user-selected resource mode, the resources of the sidelink do not depend on the base station to determine, but the terminal equipment selects the transmission resources for communication. In the resource selection process, the terminal device needs to continuously monitor the time slots in the resource monitoring window, and then exclude resources that have been reserved by other terminal devices from the resource selection window according to the monitoring result.

However, in the existing resource exclusion process, too many resources may be excluded, so that the reserved candidate resources cannot satisfy the ratio condition of the candidate resources reported to the higher layer.

SUMMARY OF THE INVENTION

In order to solve the above problem, the embodiments of the present application provide a communication method and device to solve the technical problem that the proportion of candidate resources reported to a higher layer cannot be satisfied due to the exclusion of too many resources in the resource exclusion process in the prior art.

A first aspect of the present application provides a communication method, which is applied to a terminal device. The method includes: the terminal device determines a first resource corresponding to an unmonitored time slot in a resource monitoring window in a resource selection window; A threshold or a second threshold of a candidate resource set corresponding to the resource selection window, the terminal device determines a second resource in the candidate resource set, where the first threshold is used to characterize the first resource The second threshold is used to represent the threshold of the number of remaining resources after excluding the first resource from the candidate resource set, and the second resource is used for transmitting sidelink data and/or Sidelink control information.

In an optional implementation manner, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device determines the candidate resource set in the candidate resource set. The second resource includes: the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or in the candidate resource set The number of remaining resources is less than the second threshold, the terminal device determines a third resource from the first resources, and the difference between the number of the first resources and the number of the third resources is less than or equal to the a first threshold; the terminal device adds the third resource to the candidate resource set; the terminal device determines the second resource in the candidate resource set after adding the third resource.

In an optional implementation manner, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device excludes all the candidate resources from the candidate resource set. The first resource includes: the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or the candidate resource set If the number of resources remaining in the set is less than the second threshold, the terminal device adds some or all of the first resources to the candidate resource set until the number of resources in the candidate resource set after adding some or all of the first resources is not less than the second threshold; the terminal device determines the second resource in the candidate resource set for adding part or all of the first resource.

In an optional implementation manner, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device determines the candidate resource set in the candidate resource set. The second resource includes: the terminal device excludes some or all of the first resources in the candidate resource set, until the number of excluded first resources is equal to the first threshold of the first resources, or, until the The number of resources remaining in the candidate resource set is equal to the second threshold; the terminal device determines the second resource in the candidate resource set after excluding some or all of the first resources.

In an optional implementation manner, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device determines the candidate resource set in the candidate resource set. The second resource includes: if the number of the first resources is greater than the first threshold, the terminal device excludes part or all of the first resources until the number of the first resources is less than or equal to the first threshold; the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; the terminal device determines the first resource from the candidate resource set after excluding the first resource Second resource.

In an optional implementation manner, the terminal device determining the third resource from the first resource includes: the terminal device randomly determining the third resource from the first resource, or, The terminal device determines the third resource from the first resource according to the time domain sequence of the candidate resources.

In an optional implementation manner, the first threshold is determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the higher layer, and the first parameter.

In an optional implementation manner, the terminal device determining the first resource corresponding to the non-monitored time slot in the resource monitoring window in the resource selection window includes: the terminal device indicates according to the non-monitored time slot and the high-level parameter indication. Determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window.

In an optional implementation manner, the method further includes: if the terminal device has made a periodic reservation for the fourth resource on the non-listening time slot in the resource monitoring window, the terminal device is in the The reservation period corresponding to the fourth resource is excluded from the first period set indicated by the high layer parameter.

In an optional implementation manner, the fourth resource is a resource corresponding to the preemption detection process.

In an optional implementation manner, the method further includes: the terminal device receives sidelink control information in a listening time slot within the resource monitoring window; the terminal device determines the sidelink control information The physical layer side link shared channel corresponding to the information; if the measured value of the reference signal received power of the physical layer side link shared channel corresponding to the side link control information is higher than the third threshold, the terminal equipment The resource corresponding to the sidelink control information is excluded from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, before the terminal device determines the second resource in the candidate resource set, the method further includes: if excluding the resource corresponding to the sidelink control information and/or The number of resources remaining in the candidate resource set after the first resource is less than the fourth threshold, the terminal device increases the third threshold; the terminal device uses the increased third threshold to re-select the resources corresponding to the resource selection window. The resources in the candidate resource set are excluded.

In an optional implementation manner, before the terminal device determines that the unmonitored time slot in the resource monitoring window is in the first resource corresponding to the resource selection window, the method further includes: the terminal device determines the resource selection Window and resource listener window.

In an optional implementation manner, before the terminal device determines that the unmonitored time slot in the resource monitoring window is in the first resource corresponding to the resource selection window, the method further includes: the terminal device determines that the resource selection window corresponds to the first resource. candidate resource set.

A second aspect of the present application provides a communication method, which is applied to a terminal device. The method includes: if the terminal device has made a periodic reservation for a fourth resource on an unlistened time slot in the resource monitoring window, the terminal device is The reservation period corresponding to the fourth resource is excluded from the first period set indicated by the high-level parameter; according to the first period set that excludes the reservation period corresponding to the fourth resource, the terminal device is in the resource selection window corresponding to the first period set. Resource exclusion is performed in the candidate resource set; the terminal device selects a second resource from the candidate resource set after the resource exclusion, and the second source is used for transmitting sidelink data and/or sidelink control data.

The fourth resource is a resource corresponding to the preemption detection process.

A third aspect of the present application provides a communication method, which is applied to a terminal device. The method includes: the terminal device performs resource exclusion from a candidate resource set in a resource selection window according to a fifth resource; selecting a second resource from the set; wherein the second resource is a transmission resource determined by the terminal device for the first transport block, and the fifth resource is determined by the terminal device for a transport block other than the first transport block H.

In an optional implementation manner, the method further includes: the terminal device excluding all candidate resources in the time slot where the fifth resource is located.

In an optional embodiment, the method further includes: the terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; the terminal device determines the candidate corresponding to the resource selection window in the resource selection window. The first resource is excluded from the resource set.

In an optional embodiment, the method further includes:

The method further includes: if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the number of resources remaining in the candidate resource set is less than a second threshold, then the terminal The device determines a third resource from the first resource and the fifth resource, and the difference between the sum of the quantity of the first resource and the quantity of the fifth resource and the quantity of the third resource is less than or equal to the first threshold; the terminal device adds the third resource to the candidate resource set.

In an optional implementation manner, the method further includes: if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, the terminal device adds part or all of the first resource and the fifth resource to the candidate resource set until part of the first resource and the fifth resource is added Or the number of resources in the entire candidate resource set is not less than the second threshold.

In an optional implementation manner, the terminal device performs resource exclusion in the candidate resource set of the resource selection window according to the fifth resource, including: the terminal device excludes the first resource and the candidate resource set from the candidate resource set. Part or all of the fifth resource until the sum of the number of excluded first resources and the number of excluded fifth resources is equal to the first threshold, or until the remaining resources in the candidate resource set The number is equal to the second threshold.

In an optional implementation manner, the terminal device performs resource exclusion in the candidate resource set of the resource selection window according to the fifth resource, including: if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold, the terminal device excludes part or all of the first resource and the fifth resource until the sum of the number of the first resource and the number of the fifth resource is less than or is equal to the first threshold; the terminal device excludes the first resource and the fifth resource from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the terminal device selecting the second resource from the resource-excluded candidate resource set includes: the terminal device is selecting the second resource from the candidate resource that has excluded the first resource and the fifth resource. The second resource is selected from the collection.

A fourth aspect of the present application provides a communication device, the device comprising:

a first determining module, configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window;

A second determining module, configured to determine a second resource in the candidate resource set according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, wherein the The first threshold is used to represent the threshold of the quantity of the first resource, the second threshold is used to represent the threshold of the quantity of remaining resources after excluding the first resource from the candidate resource set, the second resource Used to transmit sidelink data and/or sidelink control information.

In an optional implementation manner, the second determining module is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the number of the first resources A threshold or the number of resources remaining in the candidate resource set is less than a second threshold, then a third resource is determined from the first resources, and the difference between the number of the first resources and the number of the third resources is less than or equal to the first threshold; the third resource is added to the candidate resource set; the second resource is determined in the candidate resource set after adding the third resource.

In an optional implementation manner, the second determining module is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the number of the first resources A threshold or the number of resources remaining in the candidate resource set is less than a second threshold, add part or all of the first resources to the candidate resource set until the candidate resource set after adding part or all of the first resources The number of the remaining resources in the first resource is not less than the second threshold; the second resource is determined in the candidate resource set for adding part or all of the first resource.

In an optional implementation manner, the second determining module is specifically configured to exclude some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the number of the first resources. the first threshold, or until the number of resources remaining in the candidate resource set is equal to the second threshold; the second resource is determined in the candidate resource set after excluding some or all of the first resources.

In an optional implementation manner, the second determining module is specifically configured to exclude some or all of the first resources until the number of the first resources is greater than the first threshold. the quantity of the first resource is less than or equal to the first threshold; exclude the first resource from the candidate resource set corresponding to the resource selection window; determine the first resource from the candidate resource set after excluding the first resource the second resource.

In an optional implementation manner, the second determining module is specifically configured to randomly determine the third resource from the first resource, or select the first resource from the first resource according to the time domain order of the candidate resources. to determine the third resource.

In an optional implementation manner, the first threshold is determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the higher layer, and the first parameter.

In an optional implementation manner, the first determining module is specifically configured to determine, according to the non-monitoring time slot and the first period set indicated by the high-level parameter, that the non-monitoring time slot in the resource monitoring window is in the resource Select the first resource corresponding to the window.

In an optional implementation manner, the second determining module is further configured to indicate in the high-level parameter if the fourth resource has been periodically reserved on the non-listening time slot in the resource monitoring window. The reservation period corresponding to the fourth resource is excluded from the first period set of .

In an optional implementation manner, the fourth resource is a resource corresponding to the preemption detection process.

In an optional embodiment, the device further includes:

a receiving module, configured to receive sidelink control information in the monitoring time slot in the resource monitoring window;

The second determining module is further configured to determine the physical layer sidelink shared channel corresponding to the sidelink control information; if the physical layer sidelink shared channel corresponding to the sidelink control information is If the measured value of the received power of the reference signal is higher than the third threshold, the resource corresponding to the sidelink control information is excluded from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the second determining module is further configured to exclude the resource corresponding to the sidelink control information and/or the number of remaining resources in the candidate resource set after excluding the resource corresponding to the sidelink control information and/or the first resource. If the threshold is four, the third threshold is increased; the resources in the candidate resource set corresponding to the resource selection window are re-excluded by using the increased third threshold.

In an optional implementation manner, the first determining module is further configured to determine the resource selection window and the resource monitoring window.

In an optional implementation manner, the first determining module is further configured to determine a candidate resource set corresponding to the resource selection window.

A fifth aspect of the present application provides a communication device, the device comprising:

an exclusion module, configured to perform an over-periodic reservation on the fourth resource on the unlistened time slot in the resource monitoring window, then exclude the reservation period corresponding to the fourth resource in the first period set indicated by the high-level parameter;

A determination module, configured to perform resource exclusion in the candidate resource set corresponding to the resource selection window according to the first cycle set that excludes the reservation cycle corresponding to the fourth resource; Two resources, the second source is used for transmitting sidelink data and/or sidelink control data.

In an optional implementation manner, the fourth resource is a resource corresponding to the preemption detection process.

A sixth aspect of the present application provides a communication device, the device comprising:

an exclusion module, configured to exclude resources from the candidate resource set in the resource selection window according to the fifth resource;

a determining module, configured to select a second resource from the resource-excluded candidate resource set; wherein, the second resource is the transmission resource determined by the terminal device for the first transmission block, and the fifth resource is the terminal A resource determined by a transport block other than the first transport block by the device.

In an optional implementation manner, the exclusion module is further configured to exclude all candidate resources in the time slot where the fifth resource is located.

In an optional implementation manner, the determining module is further configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window;

The exclusion module is further configured to exclude the first resource from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the exclusion module is further configured to, if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the remaining resources in the candidate resource set. If the number of resources is less than the second threshold, a third resource is determined from the first resource and the fifth resource, and the sum of the number of the first resource and the number of the fifth resource is the same as the third resource. The difference in the number of resources is less than or equal to the first threshold; the third resource is added to the candidate resource set.

In an optional implementation manner, the exclusion module is further configured to, if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the remaining resources in the candidate resource set. if the number of resources is less than the second threshold, add part or all of the first resource and the fifth resource to the candidate resource set until part or all of the first resource and the fifth resource are added The number of resources in the latter candidate resource set is not less than the second threshold.

In an optional implementation manner, the exclusion module is further configured to exclude some or all of the first resource and the fifth resource from the candidate resource set, until the excluded first resource is The sum of the number and the number of excluded fifth resources is equal to the first threshold, or until the number of resources remaining in the candidate resource set is equal to the second threshold.

In an optional implementation manner, the exclusion module is further configured to exclude the first resource and the fifth resource if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold. Part or all of the fifth resources, until the sum of the number of the first resources and the number of the fifth resources is less than or equal to the first threshold; in the candidate resource set corresponding to the resource selection window The first resource and the fifth resource are excluded.

In an optional implementation manner, the determining module is specifically configured to select the second resource in a candidate resource set from which the first resource and the fifth resource are excluded.

A seventh aspect of the present application provides a communication device, including: a memory and a processor;

the memory for storing executable instructions of the processor;

The processor is configured to perform the method of any one of the first to third aspects.

An eighth aspect of the present application provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to execute the method of any one of the first to third aspects.

In the communication method and device provided by the embodiments of the present application, the terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; according to the first threshold of the first resource or the candidate resource set corresponding to the resource selection window The second threshold value, the terminal device determines the second resource in the candidate resource set, wherein the first threshold value is used to characterize the threshold of the quantity of the first resource, and the second threshold value is used to characterize the exclusion of the first resource from the candidate resource set After the threshold of the number of remaining resources, the second resource is used for transmitting sidelink data and/or sidelink control information. Compared with the prior art, the present application can avoid that the reserved candidate resources cannot meet the ratio condition of the candidate resources reported to the higher layer due to excluding too many resources in the resource selection process.

Description of drawings

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

2a-2c are system architecture diagrams of V2X communication according to an embodiment of the present application;

Fig. 3 is a kind of schematic flow chart of existing resource exclusion;

FIG. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

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

6 is a schematic flowchart of another communication method provided by an embodiment of the present application;

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

FIG. 8 is a schematic diagram of a resource exclusion provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of another resource exclusion provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of 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 fall within the protection scope of the present application.

It should be noted that "and/or" in the embodiment of the present application is only an association relationship describing the associated objects, which means that there may be three kinds of relationships. For example, A and/or B means: A alone exists, A and B exist at the same time, and B exists alone.

In the description and claims of the embodiments of the present application, "first" and "second" etc. are used to distinguish different objects, but are not used to describe the specific order of the objects, nor are they used to limit the specific quantity. For example, the first target object and the second target object are used to distinguish different target objects, not to describe a specific order of the target objects, nor to limit the specific number of the target objects.

In the embodiments of the present application, "exemplary" or "for example" and the like are used as examples, illustrations or descriptions. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

In the description of the embodiments of the present application, unless otherwise specified, the meaning of "plurality" refers to two or more.

The terms involved in the embodiments of the present application are first explained below.

则一个候选资源R _x,y可以被定义为在时域上位于资源选择窗口[n+T ₁，n+T ₂]内属于侧行链路资源池的时隙

在频域上位于子信道x+j的子信道集合。其中j＝0,...,L _subCH-1，即在频域上为长度等于L _subCH的一组连续子信道集合。因此，每个时隙上的候选资源总数为N _subCH-L _subCH+1。任何一组符合上述条件的长度等于L _subCH的连续子信道集合都被认为是一个候选资源R _x,y，全部候选资源的个数为M _total，定义包括全部M _total个候选资源的集合为S _A Candidate Resources: Available resources included in the resource selection window. Exemplarily, if the resource selection window is [[n+T ₁ , n+T ₂ ], the number of subchannels included in the frequency domain resources of the sidelink resource pool is N _subCH , and the corresponding set of subchannels is

Then a candidate resource R _x,y can be defined as a time slot belonging to the sidelink resource pool in the resource selection window [n+T ₁ , n+T ₂ ] in the time domain

A set of subchannels located on subchannels x+j in the frequency domain. where j=0, . . . , L _subCH -1, that is, in the frequency domain, it is a set of continuous sub-channels whose length is equal to L _subCH . Therefore, the total number of candidate resources on each slot is N _{subCH -} L _subCH +1. Any set of consecutive sub-channel sets that meet the above conditions and whose length is equal to L _subCH is regarded as a candidate resource R _x,y , the number of all candidate resources is M _total , and the set including all M _total candidate resources is defined as S _A

It should be understood that the above-mentioned L _subCH is the physical layer sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) and/or the physical layer sidelink control channel (Physical Sidelink Control Channel, PSCCH) corresponding to the data to be transmitted. The number of subchannels.

待传输数据所对应的PSSCH占用的子信道的个数L _subCH为2，则每个时隙上的候选资源总数为N _subCH-L _subCH+1＝7。 Exemplarily, FIG. 1 is a schematic diagram of a candidate resource provided by an embodiment of the present application. As shown in FIG. 1 , the maximum number of sub-channels N _subCH in the frequency domain resource pool is 8, and the corresponding set of sub-channels is

The number of subchannels L _subCH occupied by the PSSCH corresponding to the data to be transmitted is 2, and the total number of candidate resources in each time slot is N _{subCH -} L _subCH + 1=7.

其中，T ₀由高层参数(sl_SensingWindow)配置，

由表1配置。表1中的μ _SL为侧行链路带宽部分(bandwidth part，BWP)对应的子载波间隔(sub-carrier spacing，SCS)，μ _SL与子载波间隔的关系如表2所示。终端设备侦听资源侦听窗口内的属于侧行链路资源池的时隙 Resource monitoring window: If the terminal device receives a request from the upper layer to trigger the resource determination process in time slot n, the resource monitoring window can be set to

Among them, T ₀ is configured by the high-level parameter (sl_SensingWindow),

configured from Table 1. The μSL in Table 1 is the sub-carrier spacing (SCS) corresponding to the _sidelink bandwidth part (BWP), and the relationship between the _μSL and the subcarrier spacing is shown in Table 2. The terminal device listens to the time slots belonging to the sidelink resource pool within the listening resource listening window

Table 1

Table 2

_μSL Δf=2 ^μ ·15[kHz] 0 15 1 30 2 60 3 120

Resource selection window: In NR-V2X, the resource selection window can be understood as the range of resources that the terminal device can utilize when transmitting sidelink information. . Exemplarily, the resource selection window may be set as the time slot corresponding to [n+T ₁ , n+T ₂ ] after the resource selection is triggered, wherein T ₁ and T ₂ may be specifically set according to actual conditions.

定义为属于侧行链路资源池的时隙集合，终端设备自身在时隙

进行过传输，则未监听时隙为

时隙。 Non-monitoring time slot: a time slot that the terminal device does not monitor, specifically, a time slot that it has performed transmission or a time slot that is not monitored due to discontinuous reception (Discontinuous Reception, DRX) and other reasons. Exemplary,

Defined as a set of time slots belonging to the sidelink resource pool, the terminal equipment itself is in the time slot

has been transmitted, the unmonitored time slot is

time slot.

其中，

所对应的逻辑周期为P′ _{rsvp_TX}(即只包括sidelink资源池内的时隙的周期)。 High-level parameter (sl-ResourceReservePeriodList): used to indicate the resource reservation interval sent by the terminal device (resource reservation interval)

in,

The corresponding logical cycle is P' _{rsvp_TX} (that is, the cycle that only includes time slots in the sidelink resource pool).

其中，

所对应的逻辑周期(即在只包括侧行链路资源池内的时隙情况下的周期)为P′ _{rsvp_RX}。 The field "Resource reservation period" in the sidelink control information (SCI) is used to indicate the resource reservation interval (resource reservation interval) received by the terminal device

in,

The corresponding logical cycle (ie, the cycle in the case of only including time slots in the sidelink resource pool) is P' _{rsvp_RX} .

和P′ _{rsvp_TX}(P′ _{rsvp_RX})的转换关系如公式(1)所示： It should be noted,

The conversion relationship with P' _{rsvp_TX} (P' _{rsvp_RX} ) is shown in formula (1):

或

P′ _rsvp为P′ _{rsvp_TX}或P′ _{rsvp_RX}，在NR的时隙配置中，时隙配置的格式是以20ms为单位进行重复，一个时隙配置的周期为Pms，由tdd-UL-DL-ConfigurationCommon高层信令中的参数dl-UL-TransmissionPeriodicity提供。N表示在一定UL-DL时隙配置下，20ms内包括的可用于sidelink传输的时隙的个数。 Among them, P _rsvp is

or

P' _rsvp is P' _{rsvp_TX} or P' _{rsvp_RX} . In the time slot configuration of NR, the format of the time slot configuration is repeated in units of 20ms, and the period of one time slot configuration is Pms, which is determined by tdd-UL-DL-ConfigurationCommon The parameter dl-UL-TransmissionPeriodicity in higher layer signaling is provided. N represents the number of time slots available for sidelink transmission included in 20ms under a certain UL-DL time slot configuration.

The process of resource exclusion in the existing NR-V2X is described below.

Under the long term evolution (LTE) technology network proposed by the 3rd generation partnership project (3GPP), the vehicle-to-everything (V2X) vehicle networking technology Been proposed. Figures 2a-2c are system architecture diagrams of a V2X communication provided by an embodiment of the application. As shown in Figures 2a-2c, V2X communication refers to communication between a vehicle and anything in the outside world, including vehicle-to-vehicle communication. vehicle, V2V), vehicle to pedestrian (V2P), vehicle to infrastructure (V2I), vehicle to network (V2N) communication.

When V2X communication is performed, the terminal equipment on the vehicle needs to allocate the resources of the sidelink. The resource allocation of sidelink includes station allocation resource mode (mode-1) and user-selected resource mode (mode-2). Among them, the resource allocation mode of the base station is mainly used in V2X communication under the situation of network coverage. The base station uniformly allocates resources according to the buffer state report (BSR) report of the terminal equipment. In the user-selected resource mode, the transmission resources of the terminal device do not depend on the base station, and the terminal device selects the transmission resources for communication. This mode is not limited by network coverage. In the absence of network coverage, the terminal device can also use this mode to communicate . It should be noted that the above-mentioned resources include initial resources and/or retransmission resources.

In the resource selection process in the user-selected resource mode, the terminal device needs to continuously monitor the time slots in the resource monitoring window, and then exclude resources that have been reserved by other terminal devices from the resource selection window according to the monitoring result.

Exemplarily, FIG. 3 is a schematic flowchart of an existing resource exclusion. As shown in Figure 3, including steps S101-S103:

S101. The terminal device determines a resource selection window, and forms all candidate resources in the resource selection window into a candidate resource set.

S102. The terminal device determines a resource listening window.

S103: The terminal device performs resource exclusion on the resources in the candidate resource set according to the unmonitored time slot.

与资源选择窗口内的候选资源R _x,y在时域上满足公式(2)的条件，则将该时隙上的所有候选资源R _x,y全部进行排除。 Specifically, if the terminal device determines that it is not listening to the time slot

If the candidate resource Rx _,y in the resource selection window satisfies the condition of formula (2) in the time domain, all the candidate resources Rx _,y in the time slot are all excluded.

y+j×P′ _{rsvp_TX} =m+q×P′ _{rsvp_RX} (2)

Wherein, q=1, 2, ..., Q; j=0, 1, ..., _Cresel -1.

否则，Q＝1。T _scal为资源选择窗长T ₂对应的间隔，单位为ms。若时隙n属于侧行链路资源池，

否则

为时隙n之后第一个属于侧行链路资源池的时隙。 It should be noted that if P _{rsvp_RX} <T _scal and n′-m≤P′ _{rsvp_RX} , then

Otherwise, Q=1. T _scal is the interval corresponding to the resource selection window length T ₂ , in ms. If slot n belongs to the sidelink resource pool,

otherwise

is the first time slot belonging to the sidelink resource pool after time slot n.

However, in the existing resource exclusion method, since the terminal device does not receive the sidelink control information in the non-monitoring time slot, the specific indication of the reserved resources in the sidelink control information cannot be obtained, and can only be based on time domain conditions. Exclusion is performed without considering frequency conditions, that is, all sub-channels included in the frequency domain resources of the resource pool need to be excluded, which will result in too many excluded resources. In addition, since the sidelink control information is not received, it can only be completely excluded according to all the periods configured by the resource pool, and the high-level parameter (sl-ResourceReservePeriodList) can support up to 16 periods, and the value range of each period can be from Choose from 0ms, 1ms～99ms, 100ms, 200ms, ... 1000ms. Therefore, when the high-level parameter (sl-ResourceReservePeriodList) supports multiple periods and the value range of each period is small, it will also cause more resources to be excluded. According to the existing protocol, there is an upper limit for the exclusion of candidate resources. When too many candidate resources are excluded, so that the ratio of the set of candidate resources reported to the upper layer to the set of initial candidate resources is less than the threshold value, the candidate resources reported to the higher layer cannot be satisfied. ratio condition.

In order to solve the above problem, the embodiments of the present application provide a communication method and device to solve the technical problem that the proportion of candidate resources reported to a higher layer cannot be satisfied due to the exclusion of too many resources in the resource exclusion process in the prior art. In the present application, when the candidate resources to be excluded exceed a certain amount, a part of the candidate resources to be excluded are restored, so that the reserved candidate resources meet the ratio condition of the candidate resources reported to the higher layer.

It should be noted that the present application can be applied to an NR-V2X communication system, which can be applied not only to scenarios with network coverage, but also to communication scenarios without network coverage. Correspondingly, the resource allocation method may be a resource mode allocated by a base station, or a resource mode may be independently selected by a user, which is not limited in this embodiment of the present application.

The system architecture of the present application will be described below.

Continuing to refer to Figures 2a-2c, the terminal device can interact with the terminal device, and the terminal device can also interact with the network device. In the process of interaction between the terminal device and the terminal device, both parties in the wireless communication are user communication devices, and accordingly, side link air interface transmission can be used. In the process of interaction between the terminal device and the network device, the corresponding air interface (UTRAN-to-UE, UU) transmission can be used.

The network device may be a traditional macro base station (evolved node B, eNB) in a wireless communication system, a micro base station eNB in a heterogeneous network (Heterogeneous Network, HetNet) scenario, and a baseband processing in a distributed base station scenario. The unit (Base Band Unit, BBU) and the remote radio unit RRU (Remote Radio Unit, RRU) can be the baseband pool (BBU pool) and RRU in the cloud radio access network (Cloud Radio Access Netowrk, CRAN) scenario. In the future wireless communication system, it may be gNB.

The terminal device may be a communication device held by a user, which may include, but is not limited to, a mobile phone, a tablet computer, an e-reader, a remote control, a personal computer (PC), a notebook computer, and a personal digital assistant (PDA). , vehicle equipment, wearable devices, smart watches, smart bracelets and other devices. Alternatively, the terminal device may also be an in-vehicle terminal, an in-vehicle communication module or other embedded communication modules.

FIG. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 4 , the terminal device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, Antenna 1, Antenna 2, Mobile Communication Module 150, Wireless Communication Module 160, Audio Module 170, Speaker 170A, Receiver 170B, Microphone 170C, Headphone Interface 170D, Sensor Module 180, Key 190, Motor 191, Indicator 192, Camera 193, Display screen 194, and subscriber identification module (subscriber identification module, SIM) card interface 195 and so on. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (NPU) Wait.

Among them, the controller can be the nerve center and command module of the terminal device. The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 110 for storing instructions and data.

The charging management module 140 is used to receive charging input from the charger.

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 .

The wireless communication function of the terminal device may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, the baseband processor, and the like.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in a terminal device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.

The mobile communication module 150 may provide a wireless communication solution including 2G/3G/4G/5G, etc. applied on the terminal device.

The wireless communication module 160 receives the electromagnetic wave via the antenna 2, frequency modulates and filters the electromagnetic wave signal, and sends the processed signal to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110 , perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2 .

The terminal device realizes the display function through the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

Display screen 194 is used to display images, videos, and the like. Display screen 194 includes a display panel.

The terminal device can realize the shooting function through ISP, camera 193, video codec, GPU, display screen 194 and application processor.

The ISP is used to process the data fed back by the camera 193 . Camera 193 is used to capture still images or video.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the terminal device. The external memory card communicates with the processor 110 through the external memory interface 120 to realize the data storage function. For example to save files like music, video etc in external memory card.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The processor 110 executes various functional applications and data processing of the terminal device by executing the instructions stored in the internal memory 121 . The internal memory 121 may include a storage program area and a storage data area.

The terminal device can implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, and an application processor. Such as music playback, recording, etc.

The audio module 170 is used for converting digital audio information into analog audio signal output, and also for converting analog audio input into digital audio signal. Audio module 170 may also be used to encode and decode audio signals.

Speaker 170A, also referred to as a "speaker", is used to convert audio electrical signals into sound signals. The receiver 170B, also referred to as "earpiece", is used to convert audio electrical signals into sound signals. The microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. The earphone jack 170D is used to connect wired earphones.

The pressure sensor 180A is used to sense pressure signals, and can convert the pressure signals into electrical signals. The gyro sensor 180B can be used to determine the motion attitude of the terminal device. The air pressure sensor 180C is used to measure air pressure. The magnetic sensor 180D includes a Hall sensor. The terminal device can use the magnetic sensor 180D to detect the opening and closing of the flip holster. The acceleration sensor 180E can detect the magnitude of the acceleration of the terminal device in various directions (generally three axes). Distance sensor 180F for measuring distance. Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The ambient light sensor 180L is used to sense ambient light brightness. The fingerprint sensor 180H is used to collect fingerprints. The temperature sensor 180J is used to detect the temperature. Touch sensor 180K, also called "touch panel". The touch sensor 180K may be disposed on the display screen 194 , and the touch sensor 180K and the display screen 194 form a touch screen, also called a “touch screen”. The touch sensor 180K is used to detect a touch operation on or near it. The bone conduction sensor 180M can acquire vibration signals.

The keys 190 include a power-on key, a volume key, and the like. Motor 191 can generate vibrating cues. The motor 191 can be used for vibrating alerts for incoming calls, and can also be used for touch vibration feedback. The indicator 192 can be an indicator light, which can be used to indicate the charging state, the change of the power, and can also be used to indicate a message, a missed call, a notification, and the like. The SIM card interface 195 is used to connect a SIM card.

It can be understood that the structure illustrated in this application does not constitute a specific limitation on the terminal device. In other embodiments, the terminal device may include more or fewer components than shown, or some components may be combined, or some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

In this embodiment of the present application, the apparatus for executing the method on the side of the terminal device (or referred to as the terminal) may be the terminal device, or may be a device in the terminal device. Exemplarily, the device in the terminal device may be a chip system, a circuit, or a module, etc., which is not limited in this application. It can be understood that, in this embodiment of the present application, the sending end may be a device that executes the method on the side of the terminal device.

The technical solutions of the embodiments of the present application will be described in detail below by taking a terminal device as an example and using specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application. The execution subject of the embodiments of the present application is a terminal device, which may also be referred to as a sending user equipment (user equipment, UE), which involves a specific process of how the terminal device selects resources. As shown in Figure 5, the method includes:

S201. The terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window.

In this application, the terminal device needs to listen to the time slots belonging to the sidelink resource pool within the resource listening window. After the terminal device triggers the process of determining resources in a certain time slot, there are still time slots that the terminal device does not monitor in the resource listening window. Specifically, it may be a time slot in which the terminal device itself has transmitted or because of discontinuous reception. (Discontinuous Reception, DRX) and other reasons for not listening to the time slot. The terminal device will determine the candidate resources to be excluded according to the unmonitored time slots in the monitoring window. Wherein, according to the unmonitored time slot in the resource monitoring window, the terminal device may determine the first resource to be excluded from the candidate resource set corresponding to the resource selection window.

The first resource is first described below.

The quantity of the first resource may be one or multiple, and this embodiment of the present application does not limit the quantity of the first resource.

In an optional implementation manner, if the time slot corresponding to the unmonitored timeslot period in the resource selection window is in the sidelink resource pool, the first resource may be the unmonitored timeslot period in the resource selection window resources on the corresponding time slot. In another optional implementation manner, if the time slot corresponding to the non-monitored time slot periodically in the resource selection window is not in the sidelink resource pool, the first resource may be the non-monitored time slot and then the resource selection window after the non-monitored time slot. The first resource on the slot that belongs to the sidelink resource pool.

The following describes how to determine the first resource. In an optional implementation manner, the terminal device may determine the first resource corresponding to the non-monitored time slot in the resource monitoring window in the resource selection window according to the non-monitored time slot and the period indicated by the high-level parameter.

与候选资源R _x,y在时域上满足y+j×P′ _{rsvp_TX}＝m+q×P′ _{rsvp_RX}，则可以确定该候选资源为第一资源。其中，q＝1，2，…，Q；j＝0，1，…，C _resel-1。 Exemplary, if no listening slot

If the candidate resource R _x,y satisfies y+j×P′ _{rsvp_TX} =m+q×P′ _{rsvp_RX} in the time domain, the candidate resource can be determined as the first resource. Wherein, q=1, 2, ..., Q; j=0, 1, ..., _Cresel -1.

否 则，Q＝1。T _scal为资源选择窗长T ₂对应的间隔，单位为ms。若时隙n属于侧行链路资源池，

否则

为时隙n之后第一个属于侧行链路资源池的时隙。 It should be noted that if P _{rsvp_RX} <T _scal and n′-m≤P′ _{rsvp_RX} , then

Otherwise, Q=1. T _scal is the interval corresponding to the resource selection window length T ₂ , in ms. If slot n belongs to the sidelink resource pool,

otherwise

is the first time slot belonging to the sidelink resource pool after time slot n.

In addition, it should be noted that the above non-monitored time slot may have a corresponding first resource in the resource selection window, or may not have a corresponding first resource in the resource selection window, which is not limited in this embodiment of the present application.

S202. According to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device determines the second resource in the candidate resource set, and the second resource is used for transmitting sidelink data and/or or sidelink control information.

In some embodiments, after triggering the process of determining resources, the terminal device determines the candidate resource set SA according to the method of determining the candidate resource set mentioned in the embodiment of the present application, and the candidate resource set _SA that has not undergone the resource exclusion process may be regarded as the candidate resource set _SA The initial set of candidate resources. Subsequently, after the terminal device determines that the unmonitored time slot in the resource monitoring window is the first resource corresponding to the resource selection window, the first resource can be excluded from the candidate resource set corresponding to the resource selection window, and the candidate resource after the resource exclusion is completed. A second resource is determined from the resource set.

Exemplarily, if the initial candidate resources in the resource selection window correspond to fourteen time slots in total, the candidate resource set before resource exclusion is the candidate resource set including the above fourteen time slots. When the first resource determined by the terminal device corresponds to eight time slots in the resource selection window, the candidate resources on the eight time slots may be excluded from the candidate resource set, so that only the remaining six remain in the candidate resource set. The candidate resources on the slot are selected, so that the second resource is determined from the candidate resources on the remaining six time slots.

It should be noted that, considering the proportion of candidate resources reported to higher layers, when excluding resources from the candidate resource set in this embodiment of the present application, it is also necessary to refer to the first threshold of the first resource or the second threshold of the candidate resource set.

Exemplarily, four available resource exclusion methods are provided below.

In the first manner, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. If the number of the first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, the terminal device determines the third resource from the first resources. Wherein, the difference between the quantity of the first resource and the quantity of the third resource is less than or equal to the first threshold. Subsequently, the terminal device adds the third resource to the candidate resource set. Finally, the terminal device determines the second resource in the candidate resource set after adding the third resource.

It should be understood that the embodiments of the present application do not limit how to determine the third resource from the first resource. In an optional implementation manner, the terminal device may randomly determine the third resource from the first resource. In another optional implementation manner, the terminal device may determine the third resource from the first resource according to the time domain sequence of the candidate resources.

In the second manner, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. If the number of first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, add some or all of the first resources to the candidate resource set, until the candidate resource after adding some or all of the first resources The number of resources in the resource set is not less than the second threshold. Subsequently, the terminal device determines the second resource in the candidate resource set to which part or all of the first resource is added.

Wherein, adding part or all of the first resources to the candidate resource set can be understood as adding the first resources that have been excluded from the candidate resource set to the candidate resource set one by one, until the number of remaining resources in the candidate resource set does not When the value is less than the second threshold, stop adding the first resource to the candidate resource set.

This embodiment of the present application does not limit some or all of the first resources added to the candidate resource set. In an optional implementation manner, the terminal device may randomly determine some or all of the resources from the first resources. In another optional implementation manner, the terminal device may determine some or all of the resources from the first resources according to the time domain sequence of the candidate resources.

In a third manner, the terminal device excludes some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the first threshold of the first resources, or until the remaining resources in the candidate resource set The number is equal to the second threshold. Subsequently, the terminal device determines the second resource in the candidate resource set after excluding part or all of the first resource.

In a fourth manner, if the number of the first resources is greater than the first threshold, the terminal device excludes some or all of the first resources until the number of the first resources is less than or equal to the first threshold. Subsequently, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. Finally, the terminal device determines the second resource in the candidate resource set after excluding the first resource.

First, the first threshold and the second threshold will be described below.

The first threshold is used to represent the threshold of the number of first resources. It should be understood that the first threshold may be the maximum number of first resources allowed to be excluded, and the number of first resources cannot exceed the first threshold. The second threshold is used to represent the threshold of the number of remaining resources after excluding the first resource from the candidate resource set. It should be understood that the second threshold is the minimum number of remaining resources in the candidate resource set after excluding the first resource. The candidate resource set is in The number of remaining resources after excluding the first resource cannot be less than the second threshold. The sum of the first threshold and the second threshold may be the total number of all candidate resources included in the initial candidate resource set. It should be noted that the first threshold and/or the second threshold may be pre-configured in the terminal device, or may be delivered to the terminal device by the network device through configuration signaling. The configuration signaling may be system message block (System Information Block SIB), radio resource control (Radio Resource Control RRC) signaling, or physical layer control information, which is not limited in this embodiment of the present application.

In some embodiments, the first threshold and/or the second threshold may be determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the upper layer, and the first parameter, where the first parameter It can be pre-configured on the terminal device, or can be delivered to the terminal device by the network device through configuration signaling. The configuration signaling may be system message block (System Information Block SIB), radio resource control (Radio Resource Control RRC) signaling, or physical layer control information, which is not limited in this embodiment of the present application.

Several ways of determining the first threshold are provided below.

In an optional implementation manner, the first threshold may be (1-X) · M _total · Y, where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is reported to the high-level The ratio of candidate resources to be guaranteed, Y<=1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc.

Exemplarily, if the value of Y is 0.5, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-X) · M _total · Y, the value of the first threshold can be determined. The value is 3.5. When the number of the first resources exceeds 3.5, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the higher layer cannot be satisfied.

In another optional implementation manner, the first threshold may also be (1-Y)·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, Y<1, Y is The first parameter, and Y>=X, X is the ratio of the guaranteed candidate resources reported to the upper layer. The embodiments of the present application do not limit the values of X and Y, for example, X may be 0.2, 0.3, 0.35, and Y may be 0.7, 0.8, 0.9, and the like.

Exemplarily, if the value of Y is 0.8, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-Y)·M _total , the value of the first threshold can be determined. is 2.8. When the number of the first resources exceeds 2.8, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the higher layer cannot be satisfied.

In another optional implementation manner, the first threshold may also be (1-Y·X)·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the number of resources reported to The ratio of candidate resources to be guaranteed by the high layer, Y≥1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 5, 4, 3, 2, 2.5, 1.5, 1.75, etc. . Exemplarily, if the value of Y is 1.2, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-YX)·M _total , the value of the first threshold can be determined. is 5.6. When the number of the first resources exceeds 5.6, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the upper layer cannot be satisfied.

Several ways of determining the second threshold are provided below.

In an optional implementation manner, the second threshold may be M _total -(1-X) · M _total · Y, where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the report The ratio of candidate resources to be guaranteed to the upper layer, Y<=1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc.

Exemplarily, if the value of Y is 0.5, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to M _total -(1-X) · M _total · Y, the first The value of the second threshold is 10.5. After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 10.5, it is determined that the first resource is excluded from the candidate resource set when too many resources are excluded, and the ratio of the candidate resources reported to the higher layer cannot be satisfied. condition.

In another optional implementation manner, the second threshold may also be Y·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, Y<1, Y is the first parameter, Y>=X, X is the ratio of candidate resources reported to the high-level to be guaranteed. The embodiments of the present application do not limit the values of X and Y, for example, X may be 0.2, 0.3, 0.35, 0.5, and Y may be 0.7, 0.8, 0.9, and the like.

Exemplarily, if the value of Y is 0.8, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to Y·M _total , the value of the second threshold can be determined to be 11.2. After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 11.2, it is determined that the first resource is excluded from the candidate resource set when too many resources are excluded, and the ratio of the candidate resources reported to the higher layer cannot be satisfied. condition.

In another optional implementation manner, the second threshold may also be Y·X·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the guarantee required for reporting to the higher layer The ratio of candidate resources, Y≥1, Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 5, 4, 3, 2, 2.5, 1.5, 1.75, etc. .

Exemplarily, if the value of Y is 1.2, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to Y·X·M _total , it can be determined that the value of the second threshold is 8.4 . After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 8.4, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the upper layer cannot be satisfied. .

In the present application, after the terminal device completes the resource exclusion in the candidate resource set, the terminal device may select the second resource from the candidate resource set after the resource exclusion is completed.

In some embodiments, the terminal device may report the remaining candidate resource set to the upper layer after completing the resource exclusion, and the higher layer then selects the second resource from the remaining candidate resource set.

In addition, in an optional implementation manner, before selecting the second resource, if the terminal device makes a periodic reservation for the fourth resource on the non-listening time slot in the resource monitoring window, the terminal device can also The reservation period corresponding to the fourth resource is excluded from the first period set indicated by the parameter. The fourth resource is a resource corresponding to the preemption detection process.

In the communication method provided by the embodiment of the present application, the terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; Two thresholds, the terminal device determines the second resource in the candidate resource set, wherein the first threshold is used to represent the threshold of the quantity of the first resource, and the second threshold is used to represent the remaining resources after excluding the first resource from the candidate resource set Threshold for the number of resources, the second resource is used for transmitting sidelink data and/or sidelink control information. Compared with the prior art, the present application can avoid that the reserved candidate resources cannot meet the ratio condition of the candidate resources reported to the higher layer due to excluding too many resources in the resource selection process.

On the basis of the foregoing embodiment, FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application. As shown in Figure 6, the method includes:

S301. The terminal device determines a resource selection window, and determines a candidate resource set corresponding to all candidate resources belonging to the sidelink resource pool in the resource selection window.

S302. The terminal device determines a resource listening window.

S303. The terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window.

In this application, the terminal device needs to listen to the time slots belonging to the sidelink resource pool within the resource listening window. After the terminal device triggers the process of determining resources in a certain time slot, there are still time slots that the terminal device does not monitor in the resource listening window. Specifically, it may be a time slot in which the terminal device itself has transmitted or because of discontinuous reception. (Discontinuous Reception, DRX) and other reasons for not listening to the time slot. The terminal device will determine the candidate resources to be excluded according to the unmonitored time slots in the monitoring window. Wherein, according to the unmonitored time slot in the resource monitoring window, the terminal device may determine the first resource to be excluded from the candidate resource set corresponding to the resource selection window.

The first resource is first described below.

The quantity of the first resource may be one or multiple, and this embodiment of the present application does not limit the quantity of the first resource.

In an optional implementation manner, if the time slot corresponding to the unmonitored timeslot period in the resource selection window is in the sidelink resource pool, the first resource may be the unmonitored timeslot period in the resource selection window resources on the corresponding time slot. In another optional implementation manner, if the time slot corresponding to the non-monitored time slot periodically in the resource selection window is not in the sidelink resource pool, the first resource may be the non-monitored time slot and then the resource selection window after the non-monitored time slot. The first resource on the slot that belongs to the sidelink resource pool.

The following describes how to determine the first resource. In an optional implementation manner, the terminal device may determine the first resource corresponding to the non-monitored time slot in the resource monitoring window in the resource selection window according to the non-monitored time slot and the period indicated by the high-level parameter.

与候选资源R _x，y在时域上满足y+j×P′ _{rsvp_TX}＝m+q×P′ _{rsvp_RX}，则可以确定该候选资源为第一资源。其中，q＝1，2，…，Q；j＝0，1，…，C _resel-1。 Exemplary, if no listening slot

If the candidate resource R _x,y satisfies y+j×P′ _{rsvp_TX} =m+q×P′ _{rsvp_RX} in the time domain, the candidate resource can be determined as the first resource. Wherein, q=1, 2, ..., Q; j=0, 1, ..., _Cresel -1.

否则，Q＝1。T _scal为资源选择窗长T ₂对应的间隔，单位为ms。若时隙n属于侧行链路资源池，

否则

为时隙n之后第一个属于侧行链路资源池的时隙。 It should be noted that if P _{rsvp_RX} <T _scal and n′-m≤P′ _{rsvp_RX} , then

Otherwise, Q=1. T _scal is the interval corresponding to the resource selection window length T ₂ , in ms. If slot n belongs to the sidelink resource pool,

otherwise

is the first time slot belonging to the sidelink resource pool after time slot n.

In addition, it should be noted that the above non-monitored time slot may have a corresponding first resource in the resource selection window, or may not have a corresponding first resource in the resource selection window, which is not limited in this embodiment of the present application.

S304. According to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device performs resource exclusion in the candidate resource set, where the first threshold is used to represent the threshold of the number of the first resources , the second threshold is used to represent the threshold of the number of remaining resources after excluding the first resource from the candidate resource set, and the second resource is used to transmit sidelink data and/or sidelink control information.

In some embodiments, after triggering the process of determining resources, the terminal device determines the candidate resource set SA according to the method of determining the candidate resource set mentioned in the embodiment of the present application, and the candidate resource set _SA that has not undergone the resource exclusion process may be regarded as the candidate resource set _SA The initial set of candidate resources. Subsequently, after the terminal device determines that the unmonitored time slot in the resource monitoring window is the first resource corresponding to the resource selection window, the first resource can be excluded from the candidate resource set corresponding to the resource selection window, and the candidate resource after the resource exclusion is completed. A second resource is determined from the resource set.

Exemplarily, if the initial candidate resources in the resource selection window correspond to fourteen time slots in total, the candidate resource set before resource exclusion is the candidate resource set including the above fourteen time slots. When the first resource determined by the terminal device corresponds to eight time slots in the resource selection window, the candidate resources on the eight time slots may be excluded from the candidate resource set, so that only the remaining six remain in the candidate resource set. The candidate resources on the slot are selected, so that the second resource is determined from the candidate resources on the remaining six time slots.

It should be noted that, considering the proportion of candidate resources reported to higher layers, when excluding resources from the candidate resource set in this embodiment of the present application, it is also necessary to refer to the first threshold of the first resource or the second threshold of the candidate resource set.

Exemplarily, four available resource exclusion methods are provided below.

In the first manner, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. If the number of the first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, the terminal device determines the third resource from the first resources. Wherein, the difference between the quantity of the first resource and the quantity of the third resource is less than or equal to the first threshold. Subsequently, the terminal device adds the third resource to the candidate resource set. Finally, the terminal device determines the second resource in the candidate resource set after adding the third resource.

It should be understood that the embodiments of the present application do not limit how to determine the third resource from the first resource. In an optional implementation manner, the terminal device may randomly determine the third resource from the first resource. In another optional implementation manner, the terminal device may determine the third resource from the first resource according to the time domain sequence of the candidate resources.

In the second manner, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. If the number of first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, add some or all of the first resources to the candidate resource set, until the candidate resource after adding some or all of the first resources The number of resources in the resource set is not less than the second threshold. Subsequently, the terminal device determines the second resource in the candidate resource set to which part or all of the first resource is added.

Wherein, adding part or all of the first resources to the candidate resource set can be understood as adding the first resources that have been excluded from the candidate resource set to the candidate resource set one by one, until the number of remaining resources in the candidate resource set does not When the value is less than the second threshold, stop adding the first resource to the candidate resource set.

This embodiment of the present application does not limit some or all of the first resources added to the candidate resource set. In an optional implementation manner, the terminal device may randomly determine some or all of the resources from the first resources. In another optional implementation manner, the terminal device may determine some or all of the resources from the first resources according to the time domain sequence of the candidate resources.

In a third manner, the terminal device excludes some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the first threshold of the first resources, or until the remaining resources in the candidate resource set The number is equal to the second threshold. Subsequently, the terminal device determines the second resource in the candidate resource set after excluding part or all of the first resource.

In a fourth manner, if the number of the first resources is greater than the first threshold, the terminal device excludes some or all of the first resources until the number of the first resources is less than or equal to the first threshold. Subsequently, the terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. Finally, the terminal device determines the second resource in the candidate resource set after excluding the first resource.

First, the first threshold and the second threshold will be described below.

The first threshold is used to represent the threshold of the number of first resources. It should be understood that the first threshold may be the maximum number of first resources allowed to be excluded, and the number of first resources cannot exceed the first threshold. The second threshold is used to represent the threshold of the number of remaining resources after excluding the first resource from the candidate resource set. It should be understood that the second threshold is the minimum number of remaining resources in the candidate resource set after excluding the first resource. The candidate resource set is in The number of remaining resources after excluding the first resource cannot be less than the second threshold. The sum of the first threshold and the second threshold may be the total number of all candidate resources included in the initial candidate resource set.

It should be noted that the first threshold and/or the second threshold may be pre-configured in the terminal device, or may be delivered to the terminal device by the network device through configuration signaling. The configuration signaling may be system message block (System Information Block SIB), radio resource control (Radio Resource Control RRC) signaling, or physical layer control information, which is not limited in this embodiment of the present application.

In some embodiments, the first threshold and/or the second threshold may be determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the upper layer, and the first parameter, where the first parameter It can be pre-configured on the terminal device, or can be delivered to the terminal device by the network device through configuration signaling. The configuration signaling may be system message block (System Information Block SIB), radio resource control (Radio Resource Control RRC) signaling, or physical layer control information, which is not limited in this embodiment of the present application.

Several ways of determining the first threshold are provided below.

In an optional implementation manner, the first threshold may be (1-X) · M _total · Y, where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is reported to the high-level The ratio of candidate resources to be guaranteed, Y<=1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc.

Exemplarily, if the value of Y is 0.5, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-X) · M _total · Y, the value of the first threshold can be determined. The value is 3.5. When the number of the first resources exceeds 3.5, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the higher layer cannot be satisfied.

In another optional implementation manner, the first threshold may also be (1-Y)·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, Y<1, Y is The first parameter, and Y>=X, X is the ratio of the guaranteed candidate resources reported to the upper layer. The embodiments of the present application do not limit the values of X and Y, for example, X may be 0.2, 0.3, 0.35, and Y may be 0.7, 0.8, 0.9, and the like.

Exemplarily, if the value of Y is 0.8, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-Y)·M _total , the value of the first threshold can be determined. is 2.8. When the number of the first resources exceeds 2.8, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the higher layer cannot be satisfied.

In another optional implementation manner, the first threshold may also be (1-Y·X)·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the number of resources reported to The ratio of candidate resources to be guaranteed by the high layer, Y≥1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 5, 4, 3, 2, 2.5, 1.5, 1.75, etc. .

Exemplarily, if the value of Y is 1.2, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-YX)·M _total , the value of the first threshold can be determined. is 5.6. When the number of the first resources exceeds 5.6, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the upper layer cannot be satisfied.

Several ways of determining the second threshold are provided below.

In an optional implementation manner, the second threshold may be M _total -(1-X) · M _total · Y, where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the report The ratio of candidate resources to be guaranteed to the upper layer, Y<=1, and Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc.

Exemplarily, if the value of Y is 0.5, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to M _total -(1-X) · M _total · Y, the first The value of the second threshold is 10.5. After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 10.5, it is determined that the first resource is excluded from the candidate resource set when too many resources are excluded, and the ratio of the candidate resources reported to the higher layer cannot be satisfied. condition.

In another optional implementation manner, the second threshold may also be Y·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, Y<1, Y is the first parameter, Y>=X, X is the ratio of candidate resources reported to the high-level to be guaranteed. The embodiments of the present application do not limit the values of X and Y, for example, X may be 0.2, 0.3, 0.35, 0.5, and Y may be 0.7, 0.8, 0.9, and the like.

Exemplarily, if the value of Y is 0.8, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to Y·M _total , the value of the second threshold can be determined to be 11.2. After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 11.2, it is determined that the first resource is excluded from the candidate resource set when too many resources are excluded, and the ratio of the candidate resources reported to the higher layer cannot be satisfied. condition.

In another optional implementation manner, the second threshold may also be Y·X·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, and X is the guarantee required for reporting to the higher layer The ratio of candidate resources, Y≥1, Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 5, 4, 3, 2, 2.5, 1.5, 1.75, etc. .

Exemplarily, if the value of Y is 1.2, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to Y·X·M _total , it can be determined that the value of the second threshold is 8.4 . After the terminal device excludes the first resource, when the number of remaining resources in the candidate resource set is less than 8.4, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the upper layer cannot be satisfied. .

S305. The terminal device determines the sidelink control information received in the listening time slot within the resource monitoring window.

S306. The terminal device determines the physical layer sidelink shared channel corresponding to the sidelink control information.

In the present application, after receiving the sidelink control information (SCI) in the monitoring time slot in the resource monitoring window, the terminal device can decode from the Resource reservation period field and the Priority field indicated in the SCI according to the Resource reservation period field and the Priority field. out P _{rsvp_RX} and prio _RX .

Wherein, P _{rsvp_RX} and prio _RX are the resource reservation period and priority of the physical layer shared sidelink (physical sidelink shared channel, PSSCH) corresponding to the SCI. According to the Time resource assignment field, the frequency resource assignment field and the Resource reservation period field indicated in the SCI, the resource corresponding to the SCI can be determined, and the resource is the resource reserved by other terminal devices through the SCI for sidelink transmission.

S307. If the measured value of the reference signal received power of the physical layer sidelink shared channel corresponding to the sidelink control information is higher than the third threshold, the terminal device excludes the sidelink from the candidate resource set corresponding to the resource selection window The resource corresponding to the route control information.

The third threshold may be a threshold Th _{prioTX,prioRX} of reference signal received power (Reference Signal Received Power, RSRP). Exemplarily, the third threshold is a function of the priority corresponding to the data indicated in the received SCI and the priority corresponding to the data to be sent of the terminal device. In some embodiments, the third threshold may be preconfigured.

时隙收到的SCI所确定的时频资源(即SCI对应的资源)与候选资源

重合，则可以排除该候选资源。 Exemplarily, after determining the PSSCH corresponding to the SCI, the terminal device may perform RSRP measurement on the PSSCH corresponding to the SCI, or perform RSRP measurement on the PSCCH corresponding to the PSSCH, when the measured value of RSRP is higher than the third threshold, and it is expected that

The time-frequency resources (that is, the resources corresponding to the SCI) determined by the SCI received in the time slot and the candidate resources

If they coincide, the candidate resource can be excluded.

Wherein, q=1, 2, ..., Q; j=0, 1, ..., _Cresel -1.

否则，Q＝1。T _scal为资源选择窗长T ₂对应的间隔，单位为ms。此外，若时隙n属于侧行链路资源池，

否则

为时隙n之后第一个属于sidelink资源池的时隙。 It should be noted that if P _{rsvp_RX} ≤T _scal and n′-m≤P′ _{rsvp_RX} , then

Otherwise, Q=1. T _scal is the interval corresponding to the resource selection window length T ₂ , in ms. In addition, if slot n belongs to the sidelink resource pool,

otherwise

is the first time slot belonging to the sidelink resource pool after time slot n.

S308. According to whether the number of resources remaining in the candidate resource set after excluding the resources corresponding to the sidelink control information and/or the first resource is less than the fourth threshold, the terminal device determines whether to increase the third threshold,

If yes, the terminal device uses the increased third threshold to perform step S303; if not, the terminal device performs step S309.

The fourth threshold may be set according to the size of the initial candidate resource set, which is not limited in this embodiment of the present application.

Exemplarily, the fourth threshold may be set as M _total · X, where X represents the ratio of the remaining resources in the candidate resource set after resource exclusion to all the candidate resources, for example, X may be 20%, 35%, 50% .

Exemplarily, if the fourth threshold is M _total 50%, then when the resources corresponding to the sidelink control information and/or the remaining resources in the candidate resource set after excluding the first resource are less than M _total 50%, it is necessary to The third threshold is increased, so that after the resource exclusion is performed again, the number of resources remaining in the candidate resource set after the resource exclusion is increased to satisfy the fourth threshold or greater.

This embodiment of the present application also does not limit the magnitude of the increased third threshold. In some embodiments, if the remaining candidate resources in the candidate resource set SA are less than the fourth threshold _{M total} .X%, the third threshold may be Threshold RSRP threshold Th _{prioTX, prioRX} increased 3dB.

It should be noted that another method for determining the first threshold is provided below.

The first threshold may also be (1-Y·X)·M _total , where M _total is the size of the initial candidate resource set, that is, the number of all candidate resources, X is the ratio of the candidate resources reported to the higher level to be guaranteed, and Y ≥1, Y is the first parameter. The embodiments of the present application do not limit the values of X and Y. For example, X may be 0.2, 0.3, 0.35, 0.4, 0.5, etc., and Y may be 5, 4, 3, 2, 2.5, 1.5, 1.75, etc. .

When the first threshold is (1-Y·X)·M _total , it means that the candidate resources excluded according to the unmonitored time slot cannot exceed (1-Y·X)·M _total , and the fourth threshold is X· M _total , indicating that according to The sum of the candidate resources excluded by the SCI reservation of other terminal equipment and the candidate resources excluded according to the unmonitored time slot cannot exceed (1-X)·M _total . Therefore, the candidate resources excluded according to the SCI reservation can be expressed as (1-X)·M _total -(1-Y·X)·M _total =(Y-1)X·M _total . And the candidate resources excluded according to the SCI reservation of other terminal equipment should be smaller than the sum of the excluded resources according to the above two principles, namely (Y-1)X·M _total ≤(1-X)·M _total , that is, Y≤1+ (1-X)/X, when X=0.2; Y≤5, when X=0.35, Y≤20/7; when X=0.5, Y≤2.

Assuming that the candidate resources excluded according to the SCI reservation are equal to the candidate resources excluded according to the unmonitored time slot, that is (1-Y·X)·M _total =(Y-1)X·M _total , then Y=(1+X )/2X, a possible value of X and Y is: when X=0.2; Y=3, when X=0.35, Y=27/14; when X=0.5, Y=1.5.

If it is necessary to ensure that the candidate resources excluded by the SCI reservation are larger than the candidate resources excluded according to the unmonitored time slot, that is (1-Y·X)·M _total <(Y-1)X·M _total , then Y>(1+ X)/2X, a possible value of X and Y is: when X=0.2; Y=4, when X=0.35, Y=2.5; when X=0.5, Y=1.75.

If it is necessary to ensure that the candidate resources excluded by the SCI reservation are smaller than the candidate resources excluded according to the unmonitored time slot, that is, (1-Y·X)·M _total >(Y-1)X·M _total , then Y<(1+ X)/2X, a possible value of X and Y is: when X=0.2; Y=2, when X=0.35, Y=1.5; when X=0.5, Y=1.2.

Exemplarily, if the value of Y is 1.2, the value of X is 0.5, and the value of the initial candidate resource M _total is 14, at this time, according to (1-YX)·M _total , the value of the first threshold can be determined. is 5.6. When the number of the first resources exceeds 5.6, it is determined that too many resources are excluded when the first resource is excluded from the candidate resource set, and the ratio condition of the candidate resources reported to the upper layer cannot be satisfied.

S309: The terminal device selects a second resource from the candidate resource set after resource exclusion, where the second resource is used for transmitting sidelink data and/or sidelink control information.

The technical terms, technical effects, technical features, and optional implementations of S309 can be understood with reference to S205 shown in FIG. 5 , and repeated content will not be repeated here.

In the prior art, NR-V2X also supports the preemption of reserved resources, that is, when a terminal device selects resources, it listens to resources reserved by other terminal devices, and the priority corresponding to the reserved resources is lower than that of the terminal device. the current transmission priority, the terminal device preempts the reservation. In order to reduce the impact of the preemption mechanism on system interference, NR-V2X also supports the preemption detection function, that is, for each reserved resource, it is necessary to detect whether the resource is preempted by other terminal devices before the time corresponding to the resource. Specifically, Preemption can be determined by detecting whether reserved resources are excluded. Therefore, in addition to data transmission triggering the resource exclusion process, preemption detection for a reserved resource also triggers the resource exclusion process. If the current resource exclusion process is triggered for preemption detection, and the resource corresponding to the current preemption detection is reserved periodically, that is, the resource corresponding to the cycle before the resource is reserved for the current resource. Then, regardless of whether other UEs preempt the detection resources currently to be preempted in other time slots, according to the existing protocol process, the resources to be detected will be directly excluded according to the period configured by the high-level parameter (sl-ResourceReservePeriodList). This not only leads to inaccurate preemption detection results, but also introduces more frequent reselection processes, increases system complexity, and introduces greater processing and transmission delays.

In order to solve the above problem, in the embodiment of the present application, it is also possible to detect whether the resources corresponding to the preemption detection process have been periodically reserved on the unlistened time slot, so as to perform resource exclusion in the candidate resource set corresponding to the resource selection window. FIG. 7 is a schematic flowchart of still another communication method provided by an embodiment of the present application. As shown in FIG. 7 , the method includes:

S401. If the terminal device has made a periodic reservation for the fourth resource on the unlistened time slot in the resource monitoring window, the terminal device excludes the reservation period corresponding to the fourth resource from the first period set indicated by the high-level parameter.

In this application, if the process of excluding a certain group of resources is triggered for preemption detection, and the group of resources is periodically reserved by the terminal device on the non-listening time slot in the resource monitoring window, the When the resource is excluded from the slot, the reservation period of the group of resources needs to be excluded from the first period set indicated by the high-level parameter, so as to ensure that the group of resources will not be excluded.

The fourth resource is a resource corresponding to the preemption detection process. The high-level parameter can be sl-ResourceReservePeriodList.

对资源R2进行抢占检测时，针对未监听时隙

进行资源排除时，需要将资源R2对应的周期从高层参数指示的第一周期集合中排除。 FIG. 8 is a schematic diagram of a resource exclusion provided by an embodiment of the present application. As shown in FIG. 8 , the resource R2 to be detected is located in the time slot m, and the preemption detection of the resource R2 is triggered in the time slot m-T3, and the resource R2 passes through the resource R1. Periodic reservation is performed, and the period is T, that is, the terminal device performs data transmission on the resource R1 in the time slot mT, and reserves the resource R2. At this time, in the time slot

When preemption detection of resource R2 is performed, for unmonitored time slots

When performing resource exclusion, the period corresponding to the resource R2 needs to be excluded from the first period set indicated by the high layer parameter.

S402. According to the first period set of the reservation period corresponding to the fourth resource that has been excluded, the terminal device performs resource exclusion in the candidate resource set corresponding to the resource selection window.

In this application, when the terminal device performs resource exclusion in the candidate resource set corresponding to the resource selection window, the reservation period corresponding to the fourth resource has been excluded from the first period set, so that the fourth resource will not be excluded from the candidate resource set. Four resources.

S403. The terminal device selects a second resource from the resource-excluded candidate resource set, and the second source is used for transmitting sidelink data and/or sidelink control data.

The technical terms, technical effects, technical features, and optional implementations of S403 can be understood with reference to S205 shown in FIG. 5 , and repeated content will not be repeated here.

It should be noted that, the embodiment shown in FIG. 7 may be executed independently, or may be combined with the embodiment shown in FIG. 5 or FIG. 6 , which is not limited in this application.

The communication method provided by the embodiment of the present application can avoid the resources to be preempted from being directly excluded, thereby increasing the accuracy of the preemption detection result, avoiding the introduction of more frequent reselection processes, thereby avoiding the increase of system complexity and greater processing and transmission delays.

In the prior art, after a terminal device receives multiple resource selection requests from a higher layer, if the selected resources are not excluded each time resource selection is performed, transmission conflicts will be caused and the efficiency of resource selection will be reduced. If the selected resources are excluded, it may also cause that the candidate resources finally reported to the upper layer cannot meet a certain proportion condition.

In order to solve the above problem, when performing resource exclusion, it is also possible to refer to the resources in the selected resource set provided by the high layer. FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application. As shown in FIG. 9 , the method includes:

S501. The terminal device performs resource exclusion in the candidate resource set in the resource selection window according to the fifth resource.

The second resource is a transmission resource determined by the terminal device for the first transmission block, and the fifth resource is a resource determined by the terminal device for transmission blocks other than the first transmission block.

In some embodiments, the fifth resource may be provided by higher layers. The terminal device may exclude all candidate resources on the time slot where the fifth resource is located.

This embodiment of the present application does not limit how the terminal device performs resource exclusion in the candidate resource set of the resource selection window according to the fifth resource. Exemplarily, the terminal device can determine whether the time slot corresponding to the fifth resource is excluded. Excluded, the candidate resource on the time slot corresponding to the resource is excluded.

进行监听，并在资源选择窗口[n+T ₁，n+T ₂]内进行资源排除后，最终选择在时隙n选择R1、R2和R3候选资源，则R1、R2和R3可以为上述第五资源。随后，终端设备在时隙n+1再次收到高层的资源选择请求，在资源监听窗口

进行监听，并在资源选择窗口[n+1+T ₁，n+1+T ₂]内进行资源排除。由于终端设备已经选择了R1、R2和R3候选资源，因此在时隙n+1选择资源时，除了现有技术中根据SCI的预约进行排除，还需要从候选资源集合中将已经选择的三个资源R1,R2和R3排除。 在完成资源排除后，终端设备可以将排除后的候选资源集合上报给高层进行资源选择，例如，选择R4、R5和R6。 FIG. 10 is a schematic diagram of another resource exclusion provided by an embodiment of the present application. As shown in FIG. 10 , the terminal device receives a resource selection request from a higher layer in time slot n, and the terminal device receives a resource selection request from a high-level

After monitoring and resource exclusion in the resource selection window [n+T ₁ , n+T ₂ ], the candidate resources of R1, R2 and R3 are finally selected in time slot n, then R1, R2 and R3 can be the above-mentioned Five resources. Subsequently, the terminal device receives the resource selection request from the upper layer again in the time slot n+1, and in the resource monitoring window

Monitoring is performed, and resource exclusion is performed in the resource selection window [n+1+T ₁ , n+1+T ₂ ]. Since the terminal equipment has already selected the R1, R2 and R3 candidate resources, when selecting the resources in the time slot n+1, in addition to the prior art excluding according to the reservation of the SCI, it is also necessary to select the three selected resources from the candidate resource set. Resources R1, R2 and R3 are excluded. After completing the resource exclusion, the terminal device may report the excluded candidate resource set to the upper layer for resource selection, for example, select R4, R5 and R6.

It should be noted that, the fifth resource may or may not exist in the present application, which is not limited in this embodiment of the present application.

S502. The terminal device selects a third resource from the resource-excluded candidate resource set.

The technical terms, technical effects, technical features, and optional implementations of S502 can be understood with reference to S205 shown in FIG. 5 , and repeated content will not be repeated here.

It should be noted that, the embodiment shown in FIG. 9 may be executed independently, or may be combined with the embodiment shown in FIG. 5 to FIG. 8 , which is not limited in this application.

Exemplarily, if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold or the number of resources remaining in the candidate resource set is less than the second threshold, the terminal device determines from the first resource and the fifth resource. For the third resource, the difference between the sum of the quantity of the first resource and the quantity of the fifth resource and the quantity of the third resource is less than or equal to the first threshold; the terminal device adds the third resource to the candidate resource set.

Exemplarily, if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, the terminal device will use the part or part of the first resource and the fifth resource or All are added to the candidate resource set until the number of resources in the candidate resource set after adding part or all of the first resource and the fifth resource is not less than the second threshold.

Exemplarily, the terminal device excludes part or all of the first resource and the fifth resource in the candidate resource set until the sum of the number of the excluded first resources and the number of the excluded fifth resources is equal to the first threshold, or , until the number of resources remaining in the candidate resource set is equal to the second threshold.

Exemplarily, if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold, the terminal device excludes some or all of the resources of the first resource and the fifth resource until the number of the first resource and the fifth resource The sum of the numbers is less than or equal to the first threshold; the terminal device excludes the first resource and the fifth resource from the candidate resource set corresponding to the resource selection window.

It should be noted that, some or all of the first resources and the fifth resources involved in the embodiments of this application may include all of the first resources, all of the fifth resources, some of the first resources, and the fifth Part of the resource, part of the first resource and all of the fifth resource, all of the first resource and part of the fifth resource, part of the first resource and part of the fifth resource, the first resource All resources of , and all resources of Fifth Resource.

In the communication method provided by the embodiment of the present application, in the resource selection process, it is considered that when multiple resource selection requests from a higher layer are received, each time resource selection is performed, the resource previously selected by itself needs to be excluded, thereby reducing the probability of resource collision. , which improves the throughput of the system.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program information, and the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

FIG. 11 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The communication apparatus may be implemented by software, hardware, or a combination of the two, so as to execute the communication methods in the above-mentioned embodiments. As shown in FIG. 11 , the communication apparatus 600 includes: a first processing module 601 , a second processing module 602 and a receiving module 603 .

A first determining module 601, configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window;

The second determination module 602 is configured to determine the second resource in the candidate resource set according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, wherein the first threshold is used to represent the first threshold A threshold of the number of resources, the second threshold is used to represent the threshold of the number of remaining resources after excluding the first resource from the candidate resource set, and the second resource is used to transmit sidelink data and/or sidelink control information .

In an optional implementation manner, the second determination module 602 is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or the remaining resources in the candidate resource set If the number of resources is less than the second threshold, the third resource is determined from the first resources, and the difference between the number of the first resources and the number of the third resources is less than or equal to the first threshold; the third resource is added to the candidate resource set ; Determine the second resource in the candidate resource set after adding the third resource.

In an optional implementation manner, the second determination module 602 is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or the remaining resources in the candidate resource set If the number of resources is less than the second threshold, add some or all of the first resources to the candidate resource set, until the number of remaining resources in the candidate resource set after adding the part or all of the first resources is not less than the second threshold; The second resource is determined from the candidate resource set of part or all of the first resource.

In an optional implementation manner, the second determining module 602 is specifically configured to exclude some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the first threshold of the first resources, or , until the number of remaining resources in the candidate resource set is equal to the second threshold; the second resource is determined in the candidate resource set after excluding some or all of the first resources.

In an optional implementation manner, the second determining module 602 is specifically configured to exclude part or all of the first resources if the number of the first resources is greater than the first threshold, until the number of the first resources is less than or equal to a first threshold; exclude the first resource in the candidate resource set corresponding to the resource selection window; determine the second resource in the candidate resource set after excluding the first resource.

In an optional implementation manner, the second determining module 602 is specifically configured to randomly determine the third resource from the first resource, or determine the third resource from the first resource according to the time domain sequence of the candidate resources.

In an optional implementation manner, the first threshold is determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the upper layer, and the first parameter.

In an optional implementation manner, the first determination module 601 is specifically configured to determine, according to the unlistened time slot and the first period set indicated by the high-level parameter, the unlistened time slot in the resource monitoring window is the first time slot corresponding to the resource selection window. a resource.

In an optional implementation manner, the second determining module 602 is further configured to, if the fourth resource has been periodically reserved on the non-listening time slot in the resource monitoring window, set the first periodic set indicated by the high-level parameter in the resource monitoring window. The reservation period corresponding to the fourth resource is excluded.

In an optional implementation manner, the fourth resource is a resource corresponding to the preemption detection process.

In an optional embodiment, the device further includes:

a receiving module 603, configured to receive sidelink control information in the monitoring time slot in the resource monitoring window;

The second determining module 602 is further configured to determine the physical layer sidelink shared channel corresponding to the sidelink control information; if the received power of the reference signal of the physical layer sidelink shared channel corresponding to the sidelink control information is If the measured value is higher than the third threshold, the resource corresponding to the sidelink control information is excluded from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the second determining module 602 is further configured to: if the resource corresponding to the sidelink control information and/or the remaining resource quantity in the candidate resource set after excluding the resource corresponding to the sidelink control information and/or the first resource is less than the fourth threshold, Then, the third threshold is increased; the resources in the candidate resource set corresponding to the resource selection window are re-excluded by using the increased third threshold.

In an optional implementation manner, the first determining module 601 is further configured to determine a resource selection window and a resource monitoring window.

In an optional implementation manner, the first determining module 601 is further configured to determine a candidate resource set corresponding to the resource selection window.

The communication device provided in the embodiment of the present application can perform the actions of the communication method in the above-mentioned embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

Embodiments of the present application further provide yet another communication device. The communication apparatus may be implemented by software, hardware, or a combination of the two, so as to execute the communication methods in the above-mentioned embodiments. The communication device includes:

an exclusion module, configured to perform an over-periodic reservation on the fourth resource on the unlistened time slot in the resource monitoring window, then exclude the reservation period corresponding to the fourth resource in the first period set indicated by the high-level parameter;

The determining module is configured to perform resource exclusion in the candidate resource set corresponding to the resource selection window according to the first cycle set corresponding to the reservation cycle corresponding to the fourth resource has been excluded; select the second resource from the candidate resource set after the resource exclusion, the The second source is used to transmit sidelink data and/or sidelink control data.

In an optional implementation manner, the fourth resource is a resource corresponding to the preemption detection process.

The communication device provided in the embodiment of the present application can perform the actions of the communication method in the above-mentioned embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

The embodiment of the present application further provides another communication device. The communication apparatus may be implemented by software, hardware, or a combination of the two, so as to execute the communication methods in the above-mentioned embodiments. The communication device includes:

an exclusion module, configured to exclude resources from the candidate resource set in the resource selection window according to the fifth resource;

A determination module, configured to select a second resource from the candidate resource set after resource exclusion; wherein, the second resource is the transmission resource determined by the terminal device for the first transmission block, and the fifth resource is the terminal device except the first transmission block. The resource identified by the transport block.

In an optional implementation manner, the exclusion module is further configured to exclude all candidate resources in the time slot where the fifth resource is located.

In an optional implementation manner, the determining module is further configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window;

The exclusion module is further configured to exclude the first resource from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the exclusion module is further configured to, if the sum of the number of the first resources and the number of the fifth resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, remove the A third resource is determined from the first resource and the fifth resource, and the difference between the sum of the quantity of the first resource and the quantity of the fifth resource and the quantity of the third resource is less than or equal to the first threshold; the third resource is added to the candidate in the resource collection.

In an optional implementation manner, the exclusion module is further configured to remove the first resource if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold. Part or all of a resource and a fifth resource are added to the candidate resource set until the number of resources in the candidate resource set after adding part or all of the first resource and the fifth resource is not less than the second threshold.

In an optional embodiment, the exclusion module is further configured to exclude part or all of the first resource and the fifth resource in the candidate resource set, until the number of the excluded first resources and the number of the excluded fifth resources. The sum of the numbers is equal to the first threshold, or until the number of resources remaining in the candidate resource set is equal to the second threshold.

In an optional implementation manner, the exclusion module is further configured to exclude part or all of the first resource and the fifth resource if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold, until The sum of the number of the first resource and the number of the fifth resource is less than or equal to the first threshold; the first resource and the fifth resource are excluded from the candidate resource set corresponding to the resource selection window.

In an optional implementation manner, the determining module is specifically configured to select the second resource from the candidate resource set from which the first resource and the fifth resource have been excluded.

The communication device provided in the embodiment of the present application can perform the actions of the communication method in the above-mentioned embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 14, the electronic device may include: a processor 71 (eg, a CPU), a memory 72, a receiver 73 and a transmitter 74; the receiver 73 and the transmitter 74 are coupled to the processor 71, and the processor 71 controls the receiver 73 , and the processor 71 controls the sending operation of the transmitter 74 . The memory 72 may include a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, and various information may be stored in the memory 72 for completing various processing functions and implementing the methods of the embodiments of the present application. step. Optionally, the electronic device involved in the embodiment of the present application may further include: a power supply 75 , a communication bus 76 and a communication port 77 . The receiver 73 and the transmitter 74 may be integrated in the transceiver of the electronic device, or may be independent transceiver antennas on the electronic device. A communication bus 76 is used to enable communication connections between the elements. The above-mentioned communication port 77 is used to realize connection and communication between the electronic device and other peripheral devices.

In this embodiment of the present application, the above-mentioned memory 72 is used to store computer-executable program codes, and the program codes include information; when the processor 71 executes the information, the information causes the processor 71 to perform the processing actions in the above method embodiments, so that the transmitter 74 performs the sending action in the foregoing method embodiment, so that the receiver 73 performs the receiving action in the foregoing method embodiment, the implementation principle and technical effect thereof are similar, and are not repeated here.

An embodiment of the present application further provides a chip, including a processor and an interface. The interface is used to input and output data or instructions processed by the processor. The processor is configured to execute the methods provided in the above method embodiments. The chip can be applied to the above-mentioned terminal equipment.

The present invention also provides a computer-readable storage medium, the computer-readable storage medium may include: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory) ), a magnetic disk or an optical disk and other media that can store program codes. Specifically, the computer-readable storage medium stores program information, and the program information is used for the above communication method.

The embodiment of the present application further provides a program, which is used to execute the communication method provided by the above method embodiment when the program is executed by the processor.

Embodiments of the present application further provide a program product, such as a computer-readable storage medium, where instructions are stored in the program product, and when the program product runs on a computer, the computer executes the communication method provided by the above method embodiments.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, the procedures or functions according to embodiments of the present invention result in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center via wired ( For example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes one or more available media integrated. Useful media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (50)

A communication method, characterized in that the method comprises: The terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; According to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device determines the second resource in the candidate resource set, wherein the first threshold a threshold for characterizing the quantity of the first resource, and the second threshold for characterizing a threshold for the quantity of remaining resources after excluding the first resource from the candidate resource set, the second resource is used for transmission Sidelink data and/or sidelink control information. The method according to claim 1, wherein, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device is in the candidate resource The second resource is determined in the set, including: The terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; If the number of the first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, the terminal device determines a third resource from the first resources, and the The difference between the quantity of the first resource and the quantity of the third resource is less than or equal to the first threshold; adding, by the terminal device, the third resource to the candidate resource set; The terminal device determines the second resource in the candidate resource set after adding the third resource. The method according to claim 1, wherein, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device is in the candidate resource The first resource is excluded from the collection, including: The terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; If the number of the first resources is greater than the first threshold or the number of resources remaining in the candidate resource set is less than a second threshold, the terminal device adds part or all of the first resources to the candidate resource set , until the number of resources in the candidate resource set after adding some or all of the first resources is not less than the second threshold; The terminal device determines the second resource in a candidate resource set for adding part or all of the first resource. The method according to claim 1, wherein, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device is in the candidate resource The second resource is determined in the set, including: The terminal device excludes some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the first threshold of the first resources, or until the remaining resources in the candidate resource set The number of resources is equal to the second threshold; The terminal device determines the second resource in a candidate resource set after excluding part or all of the first resource. The method according to claim 1, wherein, according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, the terminal device is in the candidate resource The second resource is determined in the set, including: If the quantity of the first resources is greater than the first threshold, the terminal device excludes part or all of the first resources until the quantity of the first resources is less than or equal to the first threshold; The terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window; The terminal device determines the second resource in the candidate resource set after excluding the first resource. The method according to claim 2, wherein the terminal device determines a third resource from the first resource, comprising: The terminal device randomly determines the third resource from the first resource, or the terminal device determines the third resource from the first resource according to the time domain sequence of candidate resources. The method according to any one of claims 1-6, wherein the first threshold is determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the upper layer, and the first a parameter. The method according to any one of claims 1-6, wherein the terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window, comprising: The terminal device determines, according to the non-monitored time slot and the first period set indicated by the high-level parameter, the first resource corresponding to the non-monitored time slot in the resource monitoring window in the resource selection window. The method according to claim 8, wherein the method further comprises: If the terminal device has made a periodic reservation for the fourth resource on the non-listened time slot in the resource monitoring window, the terminal device excludes the fourth resource from the first periodic set indicated by the high-level parameter The reservation period corresponding to the resource. The method according to claim 9, wherein the fourth resource is a resource corresponding to a preemption detection process. The method according to claim 1, wherein the method further comprises: receiving, by the terminal device, sidelink control information in a listening time slot within the resource monitoring window; determining, by the terminal device, a physical layer sidelink shared channel corresponding to the sidelink control information; If the measured value of the reference signal received power of the physical layer sidelink shared channel corresponding to the sidelink control information is higher than the third threshold, the terminal device is in the candidate resource set corresponding to the resource selection window The resource corresponding to the sidelink control information is excluded. The method according to claim 11, wherein before the terminal device determines the second resource in the candidate resource set, the method further comprises: If the number of resources remaining in the candidate resource set after excluding the resource corresponding to the sidelink control information and/or the first resource is less than the fourth threshold, the terminal device increases the third threshold; The terminal device uses the increased third threshold to exclude resources from the candidate resource set corresponding to the resource selection window again. The method according to any one of claims 1-12, characterized in that, before the terminal device determines that the unmonitored time slot in the resource monitoring window is in the first resource corresponding to the resource selection window, the method further comprises: The terminal device determines the resource selection window and the resource monitoring window. The method according to any one of claims 1-12, wherein before the terminal device determines that the unmonitored time slot in the resource monitoring window is in the first resource corresponding to the resource selection window, the method further comprises: The terminal device determines a candidate resource set corresponding to the resource selection window. A communication method, characterized in that the method comprises: If the terminal device performs an over-periodic reservation for the fourth resource on the unlistened time slot in the resource monitoring window, the terminal equipment excludes the reservation period corresponding to the fourth resource from the first period set indicated by the high-level parameter; According to the first period set that excludes the reservation period corresponding to the fourth resource, the terminal device performs resource exclusion in the candidate resource set corresponding to the resource selection window; The terminal device selects a second resource from the resource-excluded candidate resource set, where the second resource is used for transmitting sidelink data and/or sidelink control data. The method according to claim 15, wherein the fourth resource is a resource corresponding to a preemption detection process. A communication method, characterized in that the method comprises: The terminal device performs resource exclusion in the candidate resource set in the resource selection window according to the fifth resource; The terminal device selects a second resource from the resource-excluded candidate resource set; wherein, the second resource is a transmission resource determined by the terminal device for the first transport block, and the fifth resource is the terminal device Resources determined for transport blocks other than the first transport block. The method of claim 17, wherein the method further comprises: The terminal device excludes all candidate resources on the time slot where the fifth resource is located. The method according to claim 17 or 18, wherein the method further comprises: The terminal device determines the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; The terminal device excludes the first resource from the candidate resource set corresponding to the resource selection window. The method of claim 19, wherein the method further comprises: If the sum of the number of the first resources and the number of the fifth resources is greater than a first threshold or the number of resources remaining in the candidate resource set is less than a second threshold, the terminal device selects the first resource from the sum of A third resource is determined from the fifth resource, and the difference between the sum of the quantity of the first resource and the quantity of the fifth resource and the quantity of the third resource is less than or equal to the first threshold; The terminal device adds the third resource to the candidate resource set. The method according to claim 19, characterized in that, the method further comprises: If the sum of the number of the first resources and the number of the fifth resources is greater than a first threshold or the number of resources remaining in the candidate resource set is less than a second threshold, the terminal device will use the first resource and the Part or all of the fifth resource is added to the candidate resource set, until the number of resources in the candidate resource set after adding part or all of the first resource and the fifth resource is not less than the second resource threshold. The method according to claim 19, wherein the terminal device performs resource exclusion in the candidate resource set of the resource selection window according to the fifth resource, comprising: The terminal device excludes some or all of the first resource and the fifth resource from the candidate resource set until the sum of the number of the excluded first resources and the number of the excluded fifth resources is equal to The first threshold, or until the number of resources remaining in the candidate resource set is equal to the second threshold. The method according to claim 19, wherein the terminal device performs resource exclusion in the candidate resource set of the resource selection window according to the fifth resource, comprising: If the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold, the terminal device excludes part or all of the first resource and the fifth resource until the first resource The sum of the number of one resource and the number of the fifth resource is less than or equal to the first threshold; The terminal device excludes the first resource and the fifth resource from the candidate resource set corresponding to the resource selection window. The method according to any one of claims 19-23, wherein the terminal device selects the second resource from the resource-excluded candidate resource set, comprising: The terminal device selects the second resource in a candidate resource set from which the first resource and the fifth resource are excluded. A communication device, characterized in that the device comprises: a first determining module, configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; A second determining module, configured to determine a second resource in the candidate resource set according to the first threshold of the first resource or the second threshold of the candidate resource set corresponding to the resource selection window, wherein the The first threshold is used to represent the threshold of the quantity of the first resource, the second threshold is used to represent the threshold of the quantity of remaining resources after excluding the first resource from the candidate resource set, the second resource Used to transmit sidelink data and/or sidelink control information. The apparatus according to claim 25, wherein the second determining module is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or the number of resources remaining in the candidate resource set is less than the second threshold, then determine a third resource from the first resources, the number of the first resources and the difference between the third resources The difference between the numbers is less than or equal to the first threshold; the third resource is added to the candidate resource set; the second resource is determined in the candidate resource set after adding the third resource. The apparatus according to claim 25, wherein the second determining module is specifically configured to exclude the first resource from the candidate resource set corresponding to the resource selection window; if the number of the first resources is greater than the first threshold or the number of remaining resources in the candidate resource set is less than the second threshold, add some or all of the first resources to the candidate resource set until after adding the part or all of the first resources The number of resources in the candidate resource set is not less than the second threshold; the second resource is determined in the candidate resource set for adding part or all of the first resources. The apparatus according to claim 25, wherein the second determining module is specifically configured to exclude some or all of the first resources in the candidate resource set until the number of excluded first resources is equal to the The first threshold of the first resource, or until the number of resources remaining in the candidate resource set is equal to the second threshold; the second threshold is determined in the candidate resource set after excluding some or all of the first resources resource. The apparatus according to claim 25, wherein the second determining module is specifically configured to exclude part or all of the first resources if the number of the first resources is greater than the first threshold resources until the number of the first resources is less than or equal to the first threshold; the first resource is excluded from the candidate resource set corresponding to the resource selection window; the candidate resource set after the first resource is excluded to determine the second resource. The apparatus according to claim 26, wherein the second determining module is specifically configured to randomly determine the third resource from the first resource, or select the third resource from the selected resource according to the time domain order of the candidate resources. The third resource is determined from the first resource. The apparatus according to any one of claims 25-30, wherein the first threshold is determined by at least one of the following: the size of the initial candidate resource set, the ratio of the guaranteed candidate resources reported to the upper layer, and the first a parameter. The apparatus according to any one of claims 25-30, wherein the first determining module is specifically configured to determine the resource monitoring according to the unmonitored time slot and a first period set indicated by a high-level parameter The unmonitored time slot in the window is the first resource corresponding to the resource selection window. The apparatus according to claim 32, wherein the second determining module is further configured to: if the fourth resource has been periodically reserved on the non-listening time slot in the resource listening window, The reservation period corresponding to the fourth resource is excluded from the first period set indicated by the high layer parameter. The apparatus according to claim 33, wherein the fourth resource is a resource corresponding to a preemption detection process. The apparatus of claim 25, wherein the apparatus further comprises: a receiving module, configured to receive sidelink control information in the monitoring time slot in the resource monitoring window; The second determining module is further configured to determine the physical layer sidelink shared channel corresponding to the sidelink control information; if the physical layer sidelink shared channel corresponding to the sidelink control information is If the measured value of the received power of the reference signal is higher than the third threshold, the resource corresponding to the sidelink control information is excluded from the candidate resource set corresponding to the resource selection window. The apparatus according to claim 35, wherein the second determining module is further configured to exclude the resources corresponding to the sidelink control information and/or the remaining resources in the candidate resource set after the first resource is excluded If the number of resources is less than the fourth threshold, the third threshold is increased; and the resources in the candidate resource set corresponding to the resource selection window are re-excluded by using the increased third threshold. The apparatus according to any one of claims 25-36, wherein the first determining module is further configured to determine the resource selection window and the resource monitoring window. The apparatus according to any one of claims 25-36, wherein the first determining module is further configured to determine a candidate resource set corresponding to the resource selection window. A communication device, characterized in that the device comprises: an exclusion module, configured to perform an over-periodic reservation on the fourth resource on the unlistened time slot in the resource monitoring window, then exclude the reservation period corresponding to the fourth resource in the first period set indicated by the high-level parameter; A determination module, configured to perform resource exclusion in the candidate resource set corresponding to the resource selection window according to the first cycle set that excludes the reservation cycle corresponding to the fourth resource; Two resources, the second resources are used for transmitting sidelink data and/or sidelink control data. The apparatus according to claim 39, wherein the fourth resource is a resource corresponding to a preemption detection process. A communication device, characterized in that the device comprises: an exclusion module, configured to exclude resources from the candidate resource set in the resource selection window according to the fifth resource; A determination module, configured to select a second resource from the resource-excluded candidate resource set; wherein, the second resource is the transmission resource determined for the first transmission block, and the fifth resource is the terminal equipment except the first resource Resources determined by transport blocks other than transport blocks. The apparatus according to claim 41, wherein the exclusion module is further configured to exclude all candidate resources in the time slot where the fifth resource is located. The apparatus according to claim 41 or 42, wherein the determining module is further configured to determine the first resource corresponding to the unmonitored time slot in the resource monitoring window in the resource selection window; The exclusion module is further configured to exclude the first resource from the candidate resource set corresponding to the resource selection window. The apparatus according to claim 43, wherein the exclusion module is further configured to, if the sum of the number of the first resources and the number of the fifth resources is greater than a first threshold or in the candidate resource set The number of remaining resources is less than the second threshold, then a third resource is determined from the first resource and the fifth resource, and the sum of the number of the first resource and the number of the fifth resource is the same as the number of the fifth resource. The difference in the number of third resources is less than or equal to the first threshold; the third resource is added to the candidate resource set. The apparatus according to claim 43, wherein the exclusion module is further configured to, if the sum of the number of the first resources and the number of the fifth resources is greater than a first threshold or in the candidate resource set If the number of remaining resources is less than the second threshold, part or all of the first resource and the fifth resource are added to the candidate resource set until part of the first resource and the fifth resource are added Or the number of resources in the entire candidate resource set is not less than the second threshold. The apparatus according to claim 43, wherein the exclusion module is further configured to exclude some or all of the first resource and the fifth resource from the candidate resource set until the excluded resources are The sum of the number of first resources and the number of excluded fifth resources is equal to the first threshold, or until the number of resources remaining in the candidate resource set is equal to the second threshold. The apparatus according to claim 43, wherein the exclusion module is further configured to exclude the first resource if the sum of the number of the first resource and the number of the fifth resource is greater than the first threshold Part or all of the first resource and the fifth resource, until the sum of the number of the first resource and the number of the fifth resource is less than or equal to the first threshold; the candidate resource corresponding to the resource selection window The first resource and the fifth resource are excluded from the set. The apparatus according to any one of claims 43-47, wherein the determining module is specifically configured to select the second resource in a candidate resource set from which the first resource and the fifth resource have been excluded resource. A communication device, comprising: a memory and a processor; the memory for storing executable instructions of the processor; The processor is configured to perform the method of any of claims 1-24 by executing the executable instructions. A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to perform the method of any one of claims 1-24.

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