WO2022077384A1

WO2022077384A1 - Resource selection method and apparatus

Info

Publication number: WO2022077384A1
Application number: PCT/CN2020/121293
Authority: WO
Inventors: 纪鹏宇; 张健; 王昕�; 张磊
Original assignee: 富士通株式会社; 纪鹏宇; 张健; 王昕�; 张磊
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2022-04-21

Abstract

Provided are a resource selection method and apparatus. The resource selection method comprises: a second terminal device receiving a resource set sent by a first terminal device; and during resource selection or reselection, performing resource exclusion on candidate resources in a candidate resource set according to the resource set sent by the first terminal device.

Description

Resource selection method and device

technical field

The embodiments of the present application relate to the field of communication technologies.

Background technique

In Rel-15 and previous versions of the Internet of Vehicles (V2X, Vehicle to Everything) communication, two allocation methods of side link (Sidelink) resources are supported: Mode 1 and Mode 2. For Mode 1, side link resources are allocated by network equipment (such as base stations) and obtained; for Mode 2, terminal equipment autonomously selects transmission resources, that is, transmission resources are obtained through sensing or detection-resource selection process.

On the other hand, New Radio (NR, New Radio) V2X is one of the research projects of Rel-16 standardization. Compared with Long Term Evolution (LTE, Long Term Evolution) V2X, NR V2X needs to support many new scenarios and new services ( For example, remote driving, autonomous driving and fleet driving, etc.), need to meet higher technical indicators (high reliability, low latency, high data rate, etc.).

It should be noted that the above description of the technical background is only for the convenience of clearly and completely describing the technical solutions of the present application and facilitating the understanding of those skilled in the art. It should not be assumed that the above-mentioned technical solutions are known to those skilled in the art simply because these solutions are described in the background section of this application.

SUMMARY OF THE INVENTION

The inventor found that: due to the limited sensing range of terminal devices, there may be problems with hidden nodes, which may lead to resource collisions and reduce the reliability of V2X; in addition, there may be problems of exposed nodes, resulting in excessive resource exclusion. It also affects system performance.

To address at least one of the above problems, embodiments of the present application provide a resource selection method and apparatus.

According to an aspect of the embodiments of the present application, a resource selection method is provided, including:

The second terminal device receives the resource set sent by the first terminal device; and

When performing resource selection or reselection, the second terminal device performs resource exclusion on candidate resources in the candidate resource set according to the resource set sent by the first terminal device.

According to another aspect of the embodiments of the present application, a resource selection apparatus is provided, which is configured in a second terminal device, and the apparatus includes:

a receiving unit, which receives the resource set sent by the first terminal device; and

An exclusion unit, which, when performing resource selection or reselection, performs resource exclusion on candidate resources in the candidate resource set according to the resource set sent by the first terminal device.

According to another aspect of the embodiments of the present application, a resource selection method is provided, including:

The second terminal device determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal device signal strength; and

When performing resource selection or reselection, the second terminal device determines, according to the distance or position or the signal strength, whether the candidate resource in the candidate resource set overlaps with the resource indicated or reserved by the third terminal device. to be excluded.

a determining unit, which determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal device signal strength; and

An exclusion unit, which, when performing resource selection or reselection, determines whether candidate resources in the candidate resource set that overlap with the resources indicated or reserved by the third terminal device are excluded according to the distance or the position or the signal strength .

According to another aspect of the embodiments of the present application, a communication system is provided, including:

a first terminal device, which performs resource awareness and generates a resource set for reporting to the second terminal device;

A second terminal device, which receives the resource set sent by the first terminal device; and when performing resource selection or reselection, selects a candidate resource set according to the resource set sent by the first terminal device. Resource for resource exclusion.

One of the beneficial effects of the embodiments of the present application is that: when the second terminal device performs resource selection or reselection, resource exclusion is performed on candidate resources in the candidate resource set according to the resource set sent by the first terminal device. In this way, the probability of resource collision can be reduced, and the reliability of side link transmission can be increased.

With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application may be employed. It should be understood that the embodiments of the present application are not thereby limited in scope. Embodiments of the present application include many changes, modifications and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

Elements and features described in one figure or embodiment of the present application may be combined with elements and features shown in one or more other figures or embodiments. Furthermore, in the figures, like reference numerals refer to corresponding parts throughout the several figures, and may be used to designate corresponding parts that are used in more than one embodiment.

1 is a schematic diagram of a communication system according to an embodiment of the present application;

2 is a schematic diagram of a terminal device performing side link resource selection;

Fig. 3 is a scene example diagram of the hidden node problem of the embodiment of the present application;

FIG. 4 is an example diagram of a scenario of an exposed node problem according to an embodiment of the present application;

5 is a schematic diagram of a resource selection method according to an embodiment of the present application;

FIG. 6 is an example diagram of resource selection according to an embodiment of the present application;

7 is another schematic diagram of a resource selection method according to an embodiment of the present application;

FIG. 8 is another example diagram of resource selection according to an embodiment of the present application;

9 is a schematic diagram of a resource selection apparatus according to an embodiment of the present application;

FIG. 10 is another schematic diagram of a resource selection apparatus according to an embodiment of the present application;

11 is a schematic diagram of a network device according to an embodiment of the present application;

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

Detailed ways

The foregoing and other features of the present application will become apparent from the following description with reference to the accompanying drawings. In the specification and drawings, specific embodiments of the present application are specifically disclosed, which are indicative of some embodiments in which the principles of the present application may be employed, it being understood that the present application is not limited to the described embodiments, on the contrary, the present The application includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of appellation, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be referred to by these terms restricted. The term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "comprising", "including", "having", etc. refer to the presence of stated features, elements, elements or components, but do not preclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of the present application, the singular forms "a", "the", etc. include the plural forms, and should be broadly understood as "a" or "a class" rather than being limited to the meaning of "an"; in addition, the term "the" "" is understood to include both the singular and the plural, unless the context clearly dictates otherwise. In addition, the term "based on" should be understood as "at least in part based on..." and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.

In this embodiment of the present application, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Long Term Evolution Enhanced (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access) and so on.

Moreover, the communication between devices in the communication system can be carried out according to communication protocols at any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.

In this embodiment of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network devices may include but are not limited to the following devices: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobility management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) and so on.

The base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include a remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (eg femeto, pico, etc.). And the term "base station" may include some or all of their functions, each base station may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present application, the term "User Equipment" (UE, User Equipment) or "Terminal Equipment" (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services. A terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.

Wherein, the terminal device may include but is not limited to the following devices: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.

For another example, in scenarios such as the Internet of Things (IoT, Internet of Things), the terminal device may also be a machine or device that performs monitoring or measurement, such as but not limited to: Machine Type Communication (MTC, Machine Type Communication) terminals, In-vehicle communication terminals, device-to-device (D2D, Device to Device) terminals, machine-to-machine (M2M, Machine to Machine) terminals, etc.

In addition, the term "network side" or "network device side" refers to one side of the network, which may be a certain base station, and may also include one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the side of a user or terminal, which may be a certain UE, or may include one or more terminal devices as above. Unless otherwise specified in this document, "equipment" may refer to network equipment or terminal equipment.

The following describes the scenarios of the embodiments of the present application by using examples, but the present application is not limited thereto.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates the case of a terminal device and a network device as an example. As shown in FIG. 1 , a communication system 100 may include a network device 101 and

terminal devices

102 and 103 . For simplicity, FIG. 1 only takes two terminal devices and one network device as an example for description, but the embodiment of the present application is not limited to this.

In this embodiment of the present application, existing services or services that can be implemented in the future may be sent between the network device 101 and the

terminal devices

102 and 103 . For example, these services may include, but are not limited to: Enhanced Mobile Broadband (eMBB, enhanced Mobile Broadband), Massive Machine Type Communication (mMTC, massive Machine Type Communication), and Ultra-Reliable and Low Latency Communication (URLLC, Ultra-Reliable and Low). -Latency Communication), etc.

It is worth noting that FIG. 1 shows that both

terminal devices

102 and 103 are within the coverage of the network device 101, but the present application is not limited to this. Both

terminal devices

102, 103 may be outside the coverage of the network device 101, or one terminal device 102 may be within the coverage of the network device 101 and the other end device 103 may be outside the coverage of the network device 101.

In this embodiment of the present application, side link transmission may be performed between the two

terminal devices

102 and 103 . For example, the two

terminal devices

102 and 103 can both perform side link transmission within the coverage of the network device 101 to implement V2X communication, or both can perform side link transmission outside the coverage of the network device 101 to implement V2X For communication, it is also possible that one terminal device 102 is within the coverage of the network device 101 and another terminal device 103 is outside the coverage of the network device 101 to perform side link transmission to implement V2X communication.

In this embodiment of the present application, the terminal devices 102 and/or 103 can autonomously select side link resources (ie, adopt Mode 2), and in this case, the side link transmission can be independent of the network device 101, that is, the network device 101 is optional of. Of course, the embodiment of the present application may also combine the autonomous selection of side link resources (that is, using Mode 2) and the allocation of side link resources by the network device (that is, using Mode 1); the embodiment of the present application does not limit this.

In LTE V2X, terminal equipment can obtain side link transmission resources through the process of sensing detection + resource selection, in which sensing can be continuously performed to obtain the occupancy of resources in the resource pool. For example, the terminal device can estimate the resource occupancy in a later period of time (called a selection window) according to the resource occupancy in a previous period of time (called a perception window).

Figure 2 is a schematic diagram of a terminal device performing side link resource selection. As shown in Figure 2, the terminal device, for example, passes the (n-1000)th to (n-1)th subframes or time slots (that is, the sensing window, sensing window). ) in the side link control information (SCI, Sidelink Control Information) and the detection of time-frequency resource reference signals at different locations, the resource occupancy situation of the perception window can be obtained, and then the (n+T1) to ( resource occupancy of n+T2) subframes or time slots (ie selection window, selection window).

For example, when there is side link data to be sent, the physical layer of the terminal device obtains the granularity R _x,y of resource selection from a higher layer (eg, a medium access control (MAC, Media Access Control) layer); the granularity may represent a subframe A series of consecutive sub-channels within the sub-channel, each sub-channel includes more than one consecutive Physical Resource Block (PRB, Physical Resource Block), the number of PRBs can be determined by the resource pool, and the resource pool is configured or pre-configured by network devices (such as base stations). Configuration; the set of resources of size R _x,y in all subframes in the entire selection window (hereinafter referred to as Rx _,y candidate resources) is initially defined as Set A.

The terminal device may exclude some candidate resources in Set A (candidate resource set) according to the result of detection within the sensing window before the data to be sent arrives. For example, in Rel-16's NR V2X, the following R _x,y candidate resources need to be excluded:

- in time slot

The SCI is detected, and the indicated reservation period P _{rsvp_RX} and the indicated priority prio _RX of the corresponding data are obtained from the corresponding SCI format 1-A;

——Demodulation Reference Signal (DMRS, De-modulation Reference Signal) or Physical Sidelink Shared Channel (PSSCH) of the Physical Sidelink Control Channel (PSCCH) corresponding to the detected SCI format 1-A , the measurement result of the Reference Signal Receiving Power (RSRP) of the DMRS (depending on the configuration of the resource pool) of the Physical Sidelink Shared Channel) is greater than Th(prio _RX ); among them, Th(prio _RX ) takes the value corresponding to The high layer parameter ThresRSRP_pi_pj, p _j is the priority of the data to be sent by the current UE indicated by the high layer, and p _i is the detected priority of other UEs indicated in the SCI;

- The resources indicated by the corresponding SCI format 1-A and the resources of the next cycle that may be reserved (for example, for short cycles less than 100ms, may include multiple resources), and the resources in the currently sent candidate set Set A

There is an overlap, j=0,1,...,C _resel +1. The resources here refer to the candidate resources of set A in the current selection window, and the resources at the periodic positions that may be reserved in the subsequent cycles of the periodic service.

If after the above resource exclusion, the number of R _x,y candidate resources remaining in Set A is less than X% (for example, 20%) of the initial total, then increase the RSRP threshold by 3dB, from the initial Set Re-exclude in A until the number of R _x,y candidate resources remaining in Set A is greater than or equal to 20% of the initial total.

Put the R _x,y candidate resources in Set A into Set B, where Set B is an initially empty set.

Then, the physical layer of the terminal device can report Set B to the MAC layer, and the MAC layer randomly selects in Set B and selects a candidate resource for data transmission. In addition, select a modulation and coding scheme (MCS, Modulation and Coding Scheme) in the indicated resources for data transmission.

It is worth noting that the above only schematically illustrates the process of perceptual detection + resource selection in NR V2X. For the specific content of the above process, you can also refer to the content in Section 14.1.1.6 and so on in 3GPP TS 36.213 V15.2.0.

In Rel-16NR V2X, due to the limited sensing range of terminal devices, there may be a problem of hidden nodes, which leads to resource collisions and reduces the reliability of V2X. In addition, the problem of exposed nodes may also occur, resulting in excessive resource exclusion, which also affects system performance.

Figure 3 is an example of a scenario of the hidden node problem in the embodiment of the present application. As shown in Figure 3, UE B wants to send side link data to UE A, and there is a UE C near UE A that UE B cannot perceive. Since UE B and UE C cannot perceive each other, the resources selected by UE B may overlap with the resources selected by UE C, so that the data sent by UE B to UE A and the data sent by UE C to UE A will be different. cause interference. That is, UE C, as a hidden node of UE B, may interfere with the data transmission from UE B to UE A.

In this case, the resource occupancy and reservation of UE C can be obtained by UE A through the sensing process. If UE A can send UE C's resource usage as a resource set (assistance information) to UE B, UE B can exclude these resources occupied by UE C in its resource selection process, which can reduce resources The probability of collision increases the reliability of side link transmission. In the following embodiments of the first aspect, the hidden node scene shown in FIG. 3 will be used as an example for further description.

FIG. 4 is an example diagram of a scenario of the exposed node problem in the embodiment of the present application. As shown in FIG. 4 , UE B wants to send side link data to UE A, and UE B can detect the sending of UE C. According to the current existing solution, if the corresponding RSRP measurement result is greater than the RSRP threshold, UE B will exclude the resources occupied by UE C from the candidate resource set. However, due to the long distance between UE C (or UE D) and UE A, there is basically no interference between the data sent by UE B to UE A and the data sent by UE C to UE D. If UE B excludes the resources occupied by UE C, but the resources are actually available to UE B, this will result in excessive exclusion of resources, reduce resource utilization, and increase the probability of resource collision, reducing system performance.

In this case, UE A can send a resource set (assistance information) and related indication information to UE B to assist UE B in the resource selection process; UE B can use or Resource selection/exclusion is performed with reference to the received resource set and related indication information. In the following embodiments of the second aspect, the exposed node scenario shown in FIG. 4 will be used as an example for further description.

In the embodiment of the present application, the side link is described by taking V2X as an example, but the present application is not limited to this, and can also be applied to a side link transmission scenario other than V2X. In the following description, the terms "side link" and "V2X" are interchangeable, the terms "PSFCH" and "side link feedback channel" are interchangeable, and the terms "PSCCH" and " "Sidelink Control Channel" or "Sidelink Control Information" are interchangeable, as are the terms "PSSCH" and "Sidelink Data Channel" or "Sidelink Data".

In addition, transmitting or receiving PSCCH can be understood as sending or receiving side link control information carried by PSCCH; sending or receiving PSSCH can be understood as sending or receiving side link data carried by PSSCH; sending or receiving PSFCH can be understood as sending or receiving side link feedback information carried by PSFCH. Sidelink transmission (also called sidelink transmission) can be understood as PSCCH/PSSCH transmission or sidelink data/information transmission.

Embodiments of the first aspect

The embodiment of the present application provides a resource selection method, which is described from the second terminal device. The second terminal device may send side link data to the first terminal device, so the second terminal device needs to perform resource selection to determine a resource for sending side link data. From the perspective of side link data transmission, the second terminal device in this embodiment of the present application is a transmitting device, and the first terminal device is a receiving device.

In addition, the first terminal device may send a resource set (which may also be referred to as resource information) to the second terminal device. The resource set may indicate the side link resource itself, or may indicate information related to the side link resource, such as priority, RSRP measurement result, and the like. In the following description, the terms "resource set" and "side information" or "resource information" are interchangeable without causing confusion.

FIG. 5 is a schematic diagram of a resource selection method according to an embodiment of the present application. As shown in FIG. 5 , the method includes:

501. The second terminal device receives the resource set (assistance information) sent by the first terminal device; and

502. When performing resource selection or reselection, the second terminal device performs resource exclusion on candidate resources in a candidate resource set (eg, Set A) according to the resource set sent by the first terminal device.

It should be noted that the above FIG. 5 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto. For example, the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced. Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 5 .

In this embodiment of the present application, the second terminal device may perform side link resource selection or reselection, which is called (re-)selection. The resource reselection may be triggered by the result of resource re-evaluation or preemption detection performed by the second terminal device, and "resource selection or reselection" may also be referred to as "resource selection/resource reselection/resource re-evaluation/preemption detection". For the specific content of resource selection/resource reselection/resource re-evaluation/preemption detection, reference may be made to related technologies, which will not be repeated here.

When the second terminal device triggers the corresponding resource selection/reselection/re-evaluation/preemption detection process, during the corresponding resource exclusion process, if the second terminal device has obtained the resource set (auxiliary) reported by the first terminal device information), in addition to its own perception result, the second terminal device also considers the resource set reported by the first terminal device, and/or, the second terminal device performs its own perception result according to the reported resource set. renew.

In the embodiment of the present application, taking the hidden node scenario described in FIG. 3 as an example, the resource occupation and reservation situation of UE C can be obtained by UE A through the perception process; UE A takes the resource usage situation of UE C as the resource set ( auxiliary information) to UE B, then UE B can exclude these resources occupied by UE C in its resource selection process. In this way, the probability of resource collision can be reduced, and the reliability of side link transmission can be increased.

In some embodiments, the resource set reported by the first terminal device may include one or more resources (for example, an indication of time-frequency resources), and each resource may be reported together with the corresponding RSRP measurement result and priority; for example, The reported resource set (auxiliary information) includes multiple combinations of {resource, RSRP value, priority value}. Optionally, it can also contain the corresponding UE Source ID. In addition, the resource set may indicate the resources in the selection window, or may indicate reservation information that reserves the resources in the selection window.

In some embodiments, if the resource set (assistance information) does not include the first resource indicated or reserved by a sidelink control information (SCI) perceived by the second terminal device, the second The terminal device determines, according to the side link control information, whether candidate resources in the candidate resource set overlapping with the first resource are excluded.

For example, if UE B perceives an SCI used for resource reservation, but the resource set reported by UE A does not include the resources reserved in this SCI, UE B can follow the aforementioned Rel-16 related technology, according to its own The sensing result of determines whether the corresponding candidate resource that overlaps with this resource needs to be excluded.

In some embodiments, when the signal strength (RSRP) is greater than a signal strength threshold, the second terminal device excludes candidate resources in the candidate resource set that overlap with the first resource; wherein the signal strength ( RSRP) is the signal strength of the demodulation reference signal (DMRS) in the physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) corresponding to the sidelink control information; the signal strength threshold is determined by the The priority of the data to be sent by the second terminal device and the priority indicated by the side link control information are determined.

For example, the RSRP specifically used as the judgment basis is the RSRP of the PSCCH/PSSCH DMRS perceived by UE B; the RSRP threshold is determined by the priority indicated by the SCI and the priority of the data to be sent by UE B.

In some embodiments, in the case where the resource set (assistance information) includes the second resource indicated or reserved by a piece of sidelink control information perceived by the second terminal device, the second terminal device according to the The resource set and the side link control information determine whether candidate resources in the candidate resource set that overlap with the second resource are excluded.

For example, if UE B perceives an SCI for resource reservation, and the resource set reported by UE A also includes one or more resources reserved in the SCI (for example, it can be determined by the source ID in the resource set whether For the resource indicated or reserved by the SCI, if the source ID corresponding to one or more resources in the resource set is the same as the source ID indicated in the SCI, it can be considered that the resource in the resource set is the same as the resource indicated or reserved by the SCI. resources are the same), then for one or more resources included in the resource set that is reserved by the SCI perceived by UE B and reported by UE A, it is also necessary to determine whether the corresponding candidate resource overlapping with this resource needs to be exclude.

In some embodiments, when the signal strength (RSRP) is greater than the signal strength threshold, the second terminal device excludes candidate resources that overlap with the second resource in the candidate resource set; wherein the signal strength (RSRP) is the The signal strength corresponding to the second resource included in the resource set and the physical sidelink control channel (PSCCH) or the physical sidelink shared channel (PSSCH) corresponding to the sidelink control information. DMRS); the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the priority indicated by the side link control information.

For example, the RSRP specifically used as the judgment basis is the corresponding RSRP reported together with the resource and the maximum value among the RSRPs of the PSCCH/PSSCH DMRS perceived by UE B; the corresponding priority reported by UE A should be the same as that perceived by UE B itself. The priorities indicated in the SCI are equal, and the RSRP threshold is determined by the priority indicated by the SCI (that is, the corresponding priority reported by UE A) and the priority of the data to be sent by UE B.

In some embodiments, when the resource set includes a third resource that is not perceived by the second terminal device, the second terminal device determines, according to the resource set, the candidate resource set that is the same as the resource set. Whether candidate resources with overlapping third resources are excluded.

For example, if the resource reported by UE A includes a resource reserved by an SCI that is not perceived by UE B, UE B also needs to determine whether the corresponding candidate resource overlapping with the resource needs to be excluded at this time.

In some embodiments, when the signal strength (RSRP) is greater than a signal strength threshold, the second terminal device excludes the candidate resource that overlaps with the third resource in the candidate resource set; wherein the signal strength (RSRP) is the signal strength corresponding to the third resource included in the resource set; the signal strength threshold corresponds to the priority of the data to be sent by the second terminal device and the third resource included in the resource set priority is determined.

For example, the RSRP specifically used as the judgment basis is the corresponding RSRP reported together with the resource; the RSRP threshold is determined by the corresponding priority reported by UE A and the priority of the data to be sent by UE B.

In some embodiments, when the second terminal device performs the resource selection/reselection/re-evaluation/preemption detection process, if the candidate resources (or subsequent period reserved resources) in a selection window are different from the above three resources (the first If any one of the resource, the second resource, and the third resource) overlaps and the corresponding RSRP value is greater than or equal to the threshold, the candidate resource is excluded from the candidate resource set.

In some embodiments, the resources included in the resource set reported by UE A may be the subsequent resources after the time slot in which UE A reports the resource set, which directly indicates that UE B needs to be considered during resource exclusion; The resource reservation information of the SCI corresponding to the sent resource, the resource reserved by the SCI needs to be considered by the UE B when the resource is excluded.

In some embodiments, when the data to be sent is an aperiodic service, the second terminal device determines a candidate resource in the resource selection time period of the second terminal device that overlaps with the resources in the resource set is excluded.

For example, if the current transmission of UE B is an aperiodic service, only some resources within the selection window determined by UE B in the resource set reported by UE A or the reservation information need to be considered. In addition, if UE A can know that the data packet to be sent by UE B is an aperiodic service, it can only notify UE B of the resource occupancy in the selection window, which can save signaling overhead.

In some embodiments, when the data to be sent is a periodic service, the second terminal device determines whether candidate resources that overlap with the resources in the resource set in the current cycle or in the next or more cycles are excluded.

For example, if the current transmission of UE B is a periodic service, in addition to considering some resources in the selection window determined by UE B in the resource set reported by UE A, it is also necessary to consider the resources indicated or reserved by UE A after the selection window. H.

FIG. 6 is an example diagram of resource selection according to an embodiment of the present application, which shows the situation that UE B considers the resources reported by UE A when excluding resources. As shown in Figure 6, for the reserved resources perceived by both UE A and UE B, the measurement results and thresholds are based on the reporting results of UE A (such as the combination of {resources, RSRP value, priority value}) and UE A's The sensing result of B is updated; for the reserved resources that are sensed by UE A but not sensed by UE B, the measurement result and threshold are updated based on the reporting result of UE A.

The above description takes two terminal devices as an example. The embodiment of the present application can be extended to a scenario where multiple terminal devices (A1, A2, A3...) report resource sets to UE B. A3... For the resources included in the reported resource set, UE B needs to consider and determine whether to exclude them when excluding resources. Further, if multiple UE A report the resources reserved by the same SCI, UE B needs to take the maximum value of the result that it perceives and the corresponding RSRP reported by A1, A2, A3....

The following is a schematic description of how to use resources. In the following description, the candidate resources that overlap with the resources perceived by the second terminal device but not included in the reported resource set are the first type of resources; those that are not perceived by the second terminal device but are included in the resource set The candidate resources that overlap with the resources of the second terminal device are the second type of resources; the candidate resources that overlap with the resources that are both perceived by the second terminal device and included in the resource set are the third type of resources.

For example, the second type of resource may be a candidate resource that overlaps with the reserved resource detected by the first terminal device, for example, it is included in the resource set and is not recommended for use by the second terminal device; the second type of resource may also be the same as that of the first terminal device. Candidate resources for which resource overlap for which resource reservation is not detected are, for example, included in the resource set to be recommended for use by the second terminal device.

For another example, if the remaining candidate resources after resource exclusion are less than X%, perform +3dB operation for all the above three types of resources, corresponding to the RSRP threshold, and then re-determine whether the RSRP is greater than the RSRP threshold. This process can be performed multiple times until the remaining candidate resources reach X%, and the candidate resource set is reported to the MAC layer; if the remaining candidate resources after resource exclusion is greater than or equal to X%, the candidate resource set is directly reported to the MAC layer.

In some embodiments, when the resources in the resource set (assistance information) are resources recommended by the first terminal device, and the resource set includes the signal strength (RSRP) corresponding to the resources, the second terminal The device preferentially selects resources in the resource set when performing resource selection or reselection.

For example, when the resource granularity in the resource set is the same as the resource granularity (R _x,y ) when the second terminal device performs resource selection or reselection, the second terminal device preferentially selects the resource set resources in .

For another example, the second terminal device also preferentially selects the resources included in the resource set when the resource granularity in the resource set is different from the resource granularity when the second terminal device performs resource selection or reselection. A candidate resource within the time-frequency range of the resource, or a candidate resource that overlaps with the resource in the resource set is preferentially selected.

In some embodiments, when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, the second terminal device increases the second type of resources and/or Signal strength threshold for the third type of resources and continue with resource selection or reselection.

For example, if the resource set reported by UE A is marked as "preferred", when performing the +3dB operation, the RSRP threshold of this part of the resources (which can be the second or third type of resources) is preferentially increased. If the remaining candidate resources reach X%, the candidate resource set is reported to the MAC layer.

For example, the second type of resources can also be candidate resources that overlap with reserved resources that are not detected by the first terminal device. In this case, the corresponding RSRP can be considered as negative infinity or infinitesimal; UE A can use the special RSRP value or reserved value to indicate this.

In some embodiments, the second terminal device increases the signal of the first type of resource when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement intensity threshold and proceed with resource selection or reselection.

For example, if the remaining candidate resources that have been excluded after increasing the RSRP threshold still do not reach X%, then continue to perform +3dB operation on the RSRP threshold of the resources not included in the set (the first type of resources). When the candidate resource reaches X%, the candidate resource set is reported to the MAC layer.

For example, the RSRP threshold can be increased by 3dB each time in the above process. You can first increase the RSRP threshold corresponding to the second or third type of resources. If the requirements are not met, then increase the RSRP threshold of the first type of resources; if the requirements are still not met, first increase the second or third type of resources. The corresponding RSRP threshold, if the requirements are not met, then increase the RSRP threshold for the first type of resources; if the requirements are still not met, first increase the RSRP threshold corresponding to the second or third type of resources, and if the requirements are not met and then increase the RSRP threshold for the first type of resources. Such a process can be performed multiple times until the remaining candidate resources reach X%, and then the candidate resource set is reported to the MAC layer.

In some embodiments, when the resources in the resource set (assistance information) are resources not recommended by the first terminal device, and the resource set includes the signal strength (RSRP) corresponding to the resources, the second The terminal device preferentially excludes resources in the resource set when performing resource selection or reselection.

For example, the second terminal device also preferentially excludes resources in the resource set when the resource granularity in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection.

For another example, if the resource granularity in the resource set is different from the resource granularity when the second terminal device performs resource selection or reselection, the second terminal device preferentially excludes the resource. Candidate resources included in the time-frequency range of the resources in the resource set, or candidate resources overlapping with the resources in the resource set are preferentially excluded.

In some embodiments, when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, the second terminal device increases the number of resources other than the resource set signal strength threshold and proceed with resource selection or reselection.

For example, if the resource set reported by UE A is marked as "not preferred", when performing the +3dB operation, the RSRP threshold of the remaining resources (hereinafter referred to as the remaining resources) except for the resources in the set is preferentially increased. If the remaining candidate resources reach X%, the candidate resource set is reported to the MAC layer.

In some embodiments, when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, the second terminal device increases the number of resources in the resource set signal strength threshold and proceed with resource selection or reselection.

For example, if the remaining candidate resources that have been excluded after increasing the RSRP threshold still do not reach X%, continue to perform the +3dB operation on the RSRP threshold of the resources included in the set (the second type of resources or the third type of resources). When the remaining candidate resources excluded reach X%, the candidate resource set is reported to the MAC layer.

For example, the RSRP threshold can be increased by 3dB each time in the above process. You can first increase the RSRP threshold corresponding to the remaining resources. If the requirements are not met, then increase the RSRP threshold for the second or third type of resources; if the requirements are still not met, first increase the RSRP threshold corresponding to the remaining resources. If the requirements are met, then increase the RSRP threshold of the second or third type of resources; if the requirements are still not met, first increase the RSRP threshold corresponding to the remaining resources, and if the requirements are not met, then increase the second or third type of resources. RSRP threshold for class resources. Such a process can be performed multiple times until the remaining candidate resources reach X%, and then the candidate resource set is reported to the MAC layer.

In some embodiments, when the resources in the resource set are resources recommended by the first terminal device, the second terminal device determines that the second type of resources is idle, that is, does not exclude the first type of resources. secondary resources.

For example, the resource set reported by UE A does not contain the RSRP measurement result corresponding to each resource (this can save overhead); if the resource set reported by UE A is marked as "preferred", UE B considers the second type of resource For idle, make sure not to exclude.

In some embodiments, the second terminal device increases the signal strength of the third type of resources when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement threshold and proceed with resource selection or reselection.

For example, for the third type of resource, the +3dB operation is preferentially performed on the RSRP threshold of this part of the resource (this time can only be based on the RSRP result perceived by UE B itself), and if the remaining candidate resources after execution reach X%, the report will be reported. The candidate resource set is given to the MAC layer.

For another example, the +3dB operation is only performed on the RSRP threshold of the resources in the resource set reported by UE A, until the remaining candidate resources that have been excluded reach X%. If the priority corresponding to the resource is not notified in the resource set, the priority corresponding to the third type of resource in the above process is obtained by the perceived SCI, which can further save overhead.

In some embodiments, when the resources in the resource set are resources not recommended by the first terminal device, the second terminal device determines to exclude the second type of resources.

For example, the resource set reported by UE A does not include the RSRP measurement result corresponding to each resource (this can save overhead); if the resource set reported by UE A is marked as "not preferred", UE B determines to exclude the second class resource.

For example, the +3dB operation is preferentially performed on the RSRP threshold of the remaining resources except the resources in the set. If the remaining candidate resources excluded after execution reach X%, the candidate resource set will be reported to the MAC layer; otherwise, continue to be included in the set. The RSRP threshold of the resource performs a +3dB operation (at this time, it can only be based on the RSRP result perceived by UE B itself). If the remaining candidate resources after the execution reaches X%, the candidate resource set is reported to the MAC layer.

For another example, the +3dB operation is only performed on the RSRP threshold of the resources not included in the resource set reported by UE A, until the remaining candidate resources that have been excluded reach X%. If the priority corresponding to the resource is not notified in the resource set, the priority corresponding to the third type of resource in the above process is obtained by the perceived SCI, which can further save overhead.

In some embodiments, the second terminal device increases the signal of the third type of resource when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement intensity threshold and proceed with resource selection or reselection.

The use of the resource set is schematically described above, and the resource granularity of the resource set is schematically described below.

In some embodiments, the resource granularity in the resource set (assistance information) is determined by the first terminal device according to the candidate resource granularity (R _x,y ) when the second terminal device performs resource selection, and/or, by the first terminal device The device determines according to the indication of one or more side link control information when the first terminal device performs resource sensing.

For example, the resource reported by UE A may be the resource indicated by the SCI it perceives, and the resource granularity indicated by the SCI is the granularity of the reported resource. For another example, the resource reported by UE A may also be a resource obtained by combining the resources indicated by one or more perceived SCIs after the resources are combined by UE A; The granularity of the combined larger block resource is the granularity of the reported resource. For another example, the granularity (R _x,y ) of resource selection by UE B is used as the granularity of the reported resource.

In some embodiments, the signal strength corresponding to the resource in the resource set (assistance information) is a Physical Sidelink Control Channel (PSCCH) or Physical Sidelink Control Channel (PSCCH) corresponding to one or more sidelink control information that contains or overlaps the resource. The maximum value of the signal strength of the demodulation reference signal (DMRS) in the channel shared channel (PSSCH), the priority corresponding to the resource is the minimum value among the priorities indicated by the one or more side link control information .

For example, if the granularity of the combined larger block resource is used as the granularity of the reported resource, the corresponding reported RSRP is the highest value among the RSRPs of the PSCCH or PSSCH DMRS corresponding to all the overlapping resources, and the corresponding reported priority is the overlapping The minimum value among the priority values indicated by the corresponding SCI among all the resources of the value (the smaller the value, the higher the priority).

In this embodiment of the present application, after receiving the resource set reported by the first terminal device, the second terminal device can take into account the perception result of the second terminal device itself and the resources and related information reported by the first terminal device when excluding resources. The first terminal device only needs to notify the second terminal device of the corresponding resources and related information, and the decision of resource exclusion is all performed by the second terminal device. Therefore, based on the ability to solve the hidden node problem, the impact on the behavior of the terminal device is relatively small.

The above embodiments merely illustrate the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications can also be made on the basis of the above embodiments. For example, each of the above-described embodiments may be used alone, or one or more of the above-described embodiments may be combined.

It can be known from the above embodiments that, when performing resource selection or reselection, the second terminal device performs resource exclusion on the candidate resources in the candidate resource set according to the resource set sent by the first terminal device. In this way, the probability of resource collision can be reduced, and the reliability of side link transmission can be increased.

Embodiments of the Second Aspect

This embodiment of the present application provides a resource selection method, which is described from the second terminal device, and the same content as the embodiment of the first aspect will not be repeated. The embodiments of the second aspect may be executed in combination with the embodiments of the first aspect, or may be executed independently.

FIG. 7 is a schematic diagram of a resource selection method according to an embodiment of the present application. As shown in FIG. 7 , the method includes:

701. The second terminal device determines the distance between the first terminal device and the third terminal device, or the positions of the first terminal device and the third terminal device, or the first terminal device and the third terminal device. the signal strength (RSRP) of the end device; and

702. When performing resource selection or reselection, the second terminal device determines, according to the distance or position, or the signal strength, to indicate or reserve with the third terminal device in a candidate resource set (for example, Set A) Whether or not candidate resources whose resources overlap are excluded.

It should be noted that the above FIG. 7 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto. For example, the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced. Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 7 .

In this embodiment of the present application, the second terminal device may receive the resource set reported by the first terminal device, and perform resource selection/resource exclusion according to the resource set. For the content of the resource set, refer to the embodiments of the first aspect and related technologies.

In some embodiments, when performing resource selection or reselection, the second terminal device further determines the resources indicated or reserved by the third terminal device in the candidate resource set according to the resource set reported by the first terminal device Whether overlapping candidate resources are excluded.

In some embodiments, the second terminal device further determines the distance between the second terminal device and the fourth terminal device, or the location of the fourth terminal device; and the second terminal device is conducting resource During selection or reselection, it is further determined according to the distance between the second terminal device and the fourth terminal device, or the position of the fourth terminal device, in the candidate resource set, the indication or preset with the third terminal device is determined. Whether the reserved resources overlap candidate resources to be excluded.

In some embodiments, when the distance between the first terminal device and the third terminal device is greater than the first threshold value, or the first terminal device and the third terminal device are located in different areas, the second terminal device will The signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device is replaced with the signal strength corresponding to the resource reported by the first terminal device.

In some embodiments, when the distance between the first terminal device and the third terminal device is greater than the first threshold value, or the first terminal device and the third terminal device are located in different areas, the second terminal device determines that the This resource does not trigger resource preemption or resource re-evaluation.

In some embodiments, when the distance between the first terminal device and the third terminal device is greater than the first threshold value, or the first terminal device and the third terminal device are located in different areas, the second terminal device determines that the A candidate resource in the set of candidate resources that overlaps with the resource indicated or reserved by the third terminal device can be selected.

In some embodiments, the distance between the first terminal device and the third terminal device is greater than the first threshold value or the first terminal device and the third terminal device are located in different areas, and the second terminal device and the fourth terminal device When the distance between them is greater than the first threshold value or the second terminal device and the fourth terminal device are located in different areas, the second terminal device corresponds to the resource indicated or reserved by the third terminal device sensed by the second terminal device. The signal strength of is replaced with the signal strength corresponding to the resource reported by the first terminal device.

In some embodiments, the distance between the first terminal device and the third terminal device is greater than the first threshold value or the first terminal device and the third terminal device are located in different areas, and the second terminal device and the fourth terminal device When the distance between them is greater than the first threshold value or the second terminal device and the fourth terminal device are located in different areas, the second terminal device determines that the resource does not trigger resource preemption or resource re-evaluation.

In some embodiments, the distance between the first terminal device and the third terminal device is greater than the first threshold value or the first terminal device and the third terminal device are located in different areas, and the second terminal device and the fourth terminal device In the case where the distance between them is greater than the first threshold value or the second terminal device and the fourth terminal device are located in different areas, the second terminal device determines that the resource set in the candidate resource set is the same as that indicated or reserved by the third terminal device. Candidate resources with overlapping resources can be selected.

In the embodiment of the present application, taking the exposed node scenario shown in FIG. 4 as an example, UE B sends side link data to UE A, and UE C sends side link data to UE D. Based on the RSRP detection result or geographic location information, UE B can determine whether UE C (or the group corresponding to UE C) is an exposed node.

For example, if UE B determines that UE A and UE C are far away (or in different areas), UE B may consider UE C to be an exposed node; or if UE B determines that UE A and UE C are far away (or in different areas) area) and UE B and UE D are far away (or in different areas), then UE B can consider UE C to be an exposed node. For details on how to determine the distance and position, refer to the following embodiments. If UE C is determined to be an exposed node, UE B may consider the overlapping candidate resources to be idle for the resources indicated or reserved by UE C.

That is, the candidate resource is not excluded in the resource exclusion process; alternatively, UE B can also use the RSRP result of the resource indicated or reserved by UE C reported by UE A (or the maximum value among the RSRPs reported by A1, A2, A3... ) replaces the RSRP result of the resource obtained by UE B perception; alternatively, UE B can also consider that the RSRP threshold of the resource is preferentially executed in the +3dB process; alternatively, UE B can also consider that the resource will not trigger the physical layer Report the re-evaluation/pre-emption indication to the MAC layer. In this way, the possibility of excessive resource exclusion due to the existence of exposed nodes can be reduced, so that UE B has more candidate resources, which can increase resource utilization and reduce resource congestion and collision probability.

In some embodiments, the second terminal device determines the distance between the first terminal device and the third terminal device according to sidelink control information from the first terminal device and the third terminal device or location information or area identification in the resource set Whether the distance is greater than the first threshold value, or determine whether the first terminal device and the third terminal device are located in different areas.

In some embodiments, the center position of the second terminal device in the nearest area indicated by the location information or the area identifier in the sidelink control information or resource set from the first terminal device and the sidelink from the third terminal device In the case where the distance between the center positions of the nearest areas indicated by the location information or the area identifier in the control information or the resource set is greater than the predetermined distance or the communication range requirement in the side link control information, determine that the first terminal device and the The distance between the third terminal devices is greater than the first threshold value.

In some embodiments, the second terminal device is in the area indicated by the area identifier in the sidelink control information from the first terminal device and the area indicated by the area identifier in the sidelink control information from the third terminal device In different cases, it is determined that the first terminal device and the third terminal device are located in different areas.

In some embodiments, the second terminal device determines whether the distance between the second terminal device and the fourth terminal device is greater than the first a threshold value, or determine whether the second terminal device and the fourth terminal device are located in different areas.

In some embodiments, the distance between the central location of the second terminal device in its own area and the central location of the nearest area indicated by the location information or area identifier in the sidelink control information or resource set from the fourth terminal device When the distance is greater than the predetermined distance or the communication range requirement in the side link control information, it is determined that the distance between the second terminal device and the fourth terminal device is greater than the first threshold value.

In some embodiments, the second terminal device determines that the second terminal device and the fourth terminal device are located in different locations in the case that its own area is different from the area indicated by the area identifier in the side link control information from the fourth terminal device area.

For example, in the scenario shown in Figure 4, UE B obtains the geographic location information of UE A and UE C, and judges that the distance between them is greater than a threshold; optionally, UE B also obtains the geographic location of UE D Location information, judging that the distance between itself and UE D is greater than a threshold value.

For another example, UE B obtains the SCI of UE A and UE C through perception, and obtains the geographic location information of UE A and UE C through the indication of the SCI; further, the geographic location information of UE D can be obtained by UE C through the resource set (assisted information) to UE B.

For another example, UE B obtains the resource set (auxiliary information) sent by UE A, and obtains the geographic location information of UE A through the resource set (auxiliary information); UE B also obtains the SCI or resource set (auxiliary information) sent by UE C, The geographic location information of UE C is obtained through the SCI or resource set (auxiliary information); thus the distance between them can be judged.

In some embodiments, for the resource indicated or reserved by the side link control information sent by the third terminal device, the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the second gate When the limit value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or when the resource corresponding to the resource sensed by the second terminal device In the case where the signal strength of the resource is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device determines that the candidate resource set in the candidate resource set is the same as that indicated or reserved by the third terminal device. A candidate resource with overlapping resources is idle, that is, the candidate resource can be selected.

In some embodiments, for the resource indicated or reserved by the side link control information sent by the third terminal device, the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the second gate When the limit value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or when the resource corresponding to the resource sensed by the second terminal device In the case that the signal strength of the resource is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device indicates or predicts the third terminal device sensed by the second terminal device. The signal strength corresponding to the reserved resource is replaced with the signal strength corresponding to the resource reported by the first terminal device.

In some embodiments, for the resource indicated or reserved by the side link control information sent by the third terminal device, the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the second gate When the limit value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or when the resource corresponding to the resource sensed by the second terminal device When the signal strength of the resource is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device determines that the resource does not trigger resource preemption or resource re-evaluation.

For example, for the same resource reserved by the SCI sent by UE C (the resource reported by UE A also needs to include a corresponding UE Source ID), the RSRP value obtained by UE B through perception is greater than or equal to the threshold, and/or , the RSRP value corresponding to the resource reported by UE A is less than the threshold, and/or the RSRP value obtained by UE B through perception is greater than or equal to the RSRP value corresponding to the resource reported by UE A, then UE B can perform resource exclusion for the resource. The above-mentioned corresponding processing is performed.

For another example, the threshold here may be different from the threshold used for resource exclusion, and may be a separate RSRP threshold. Optionally, UE B perceives that the RSRP corresponding to the reserved resources of UE D is smaller than the threshold, or UE C determines that UE C uses its own perception of UE B and the resource set (auxiliary information) reported to it by UE D. B is far away from UE D, and then reports this message to UE B through the resource set (auxiliary information).

FIG. 8 is another example diagram of resource selection according to an embodiment of the present application, which shows a situation in which UE B considers the resources reported by UE A when excluding resources. As shown in Figure 8, if a certain resource (such as the resource shown in the dotted box in Figure 8) is indicated or reserved by the exposed node UE C, and the resource is sensed by both UE A and UE B, UE A is used The reported RSRP result is used as the RSRP of the resource.

In some embodiments, the second terminal device determines the priority of the data to be sent and/or the priority corresponding to the resource indicated or reserved by the third terminal device; and the priority of the data to be sent is higher than the priority of the third terminal device. When the three thresholds and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold, and/or when the priority of the data to be sent is high In the case of the priority corresponding to the resource indicated or reserved by the third terminal device, the second terminal device determines the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device. The resource is free, ie the candidate resource can be selected.

In some embodiments, the second terminal device determines the priority of the data to be sent and/or the priority corresponding to the resource indicated or reserved by the third terminal device; and the priority of the data to be sent is higher than the priority of the third terminal device. When the three thresholds and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold, and/or when the priority of the data to be sent is high In the case of the priority corresponding to the resources indicated or reserved by the third terminal equipment, the second terminal equipment corresponds to the resources indicated or reserved by the third terminal equipment perceived by the second terminal equipment. is replaced with the signal strength corresponding to the resource reported by the first terminal device.

For example, whether UE B can perform the above processing on the reserved resources of UE C may also depend on the priority of the data to be sent by UE B itself, and/or the SCI corresponding to the reserved resources of UE C detected by UE B. indicated priority.

For example, the priority of the data to be sent by UE B is higher than the threshold, and/or the priority indicated by the SCI corresponding to the reserved resources of UE C is lower than the threshold, and/or the priority of the data to be sent by UE B is higher than the threshold Only when the priority indicated by the SCI corresponding to the reserved resources of UE C, UE B can consider that UE C is an exposed node and perform the above processing on the resources reserved by UE C.

It can be known from the above-mentioned embodiments that the second terminal device according to the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the signal of the first terminal device and the third terminal device Strength, to determine whether candidate resources in the candidate resource set that overlap with the resources indicated or reserved by the third terminal device are excluded. In this way, excessive exclusion of resources can be avoided to a certain extent, and the probability of collision and the possibility of channel congestion can be reduced, thereby improving system performance.

Embodiments of the third aspect

Embodiments of the present application provide a resource selection apparatus. The apparatus may be, for example, a terminal device (eg, the aforementioned second terminal device), or may be one or some components or components configured in the terminal device, and the same content as the embodiment of the first aspect will not be repeated.

FIG. 9 is a schematic diagram of a resource selection apparatus according to an embodiment of the present application. As shown in FIG. 9, the resource selection apparatus 900 includes:

a receiving unit 901, which receives the resource set sent by the first terminal device; and

An exclusion unit 902, which, when performing resource selection or reselection, performs resource exclusion on candidate resources in the candidate resource set according to the resource set sent by the first terminal device.

In some embodiments, in the case that the resource set does not include the first resource indicated or reserved by a piece of sidelink control information perceived by the second terminal device, according to the sidelink control information to determine whether candidate resources in the candidate resource set that overlap with the first resource are excluded;

Wherein, when the signal strength is greater than the signal strength threshold, the exclusion unit 902 excludes the candidate resource overlapping the first resource in the candidate resource set; wherein the signal strength corresponds to the side link control information The signal strength of the demodulation reference signal in the physical side link control channel or the physical side link shared channel; the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the side link control information. The indicated priority is determined.

In some embodiments, when the resource set includes a second resource indicated or reserved by a piece of sidelink control information perceived by the second terminal device, according to the resource set and the The side link control information determines whether candidate resources in the candidate resource set that overlap with the second resource are excluded;

Wherein, when the signal strength is greater than the signal strength threshold, the exclusion unit 902 excludes candidate resources in the candidate resource set that overlap with the second resource; wherein, the signal strength is all the resources included in the resource set The signal strength corresponding to the second resource and the maximum value of the signal strength of the demodulation reference signal in the physical side link control channel or the physical side link shared channel corresponding to the side link control information; the signal strength threshold is determined by The priority of the data to be sent by the second terminal device and the priority indicated by the side link control information are determined.

In some embodiments, in the case that the resource set includes a third resource that is not perceived by the second terminal device, it is determined according to the resource set that the candidate resource set overlaps with the third resource Whether the candidate resource of ? is excluded;

Wherein, when the signal strength is greater than the signal strength threshold, the exclusion unit 902 excludes candidate resources in the candidate resource set that overlap with the third resource; wherein the signal strength is all the resources included in the resource set the signal strength corresponding to the third resource; the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the priority corresponding to the third resource included in the resource set.

In some embodiments, the exclusion unit 902 is further configured to: in the case that the data to be sent is aperiodic service, determine the resource selection time period of the second terminal device that overlaps with the resources in the resource set Whether the candidate resource is excluded; if the data to be sent is a periodic service, determine whether the candidate resource that overlaps with the resource in the resource set in the current cycle or the next or more cycles is excluded.

In some embodiments, candidate resources that overlap with resources perceived by the second terminal device but not included in the resource set are resources of the first type; and resources not perceived by the second terminal device but included in the resource set The candidate resources in which the resources in the resource set overlap are the second type of resources; the candidate resources which overlap with the resources both perceived by the second terminal device and included in the resource set are the third type of resources.

In some embodiments, when the resources in the resource set are resources recommended by the first terminal device, and the resource set includes the signal strength corresponding to the resources, when performing resource selection or reselection Preferentially select the resources in the resource set;

In the case that the resource granularity in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection, the resources in the resource set are preferentially selected, or, in the resource set, the resources in the resource set are preferentially selected. When the resource granularity is different from the resource granularity when the second terminal device performs resource selection or reselection, the candidate resources within the time-frequency range of the resources included in the resource set are preferentially selected, or the candidate resources that are the same as the selected resources are preferentially selected. A candidate resource whose resources in the resource set overlap.

In some embodiments, the exclusion unit 902 is further configured to: in the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the resources of the second type and/or the signal strength threshold of the third type of resources and proceed with resource selection or reselection;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the first type of resources and continue to perform resource selection or reselection .

In some embodiments, when the resources in the resource set are resources not recommended by the first terminal device, and the resource set includes the signal strength (RSRP) corresponding to the resources, the resource selection is performed Or preferentially exclude the resources in the resource set during reselection;

In the case that the resource granularity in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection, the resources in the resource set are preferentially excluded, or, in the resource set, the resources in the resource set are preferentially excluded. When the resource granularity is different from the resource granularity when the second terminal device performs resource selection or reselection, the second terminal device preferentially excludes candidate resources within the time-frequency range of the resources included in the resource set , or preferentially exclude candidate resources that overlap with resources in the resource set.

In some embodiments, the excluding unit 902 is further configured to: in the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the number of resources except the resource set the signal strength threshold of the resource and continue with resource selection or reselection;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the resources in the resource set and continue to perform resource selection or reset select.

In some embodiments, when the resources in the resource set are resources recommended by the first terminal device, and the resource set does not include the signal strength corresponding to the resources, determine the second type of resources for free;

In the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the signal strength threshold of the third type of resources and continue to perform resource selection or reselection;

In some embodiments, when the resources in the resource set are resources not recommended by the first terminal device, and the resource set does not include the signal strength corresponding to the resources, it is determined to exclude the second terminal device. class resource;

In the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the signal strength threshold of resources other than the resource set and continue to perform resource selection or reset select;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the third type of resources and continue to perform resource selection or reselection .

In some embodiments, the resource granularity in the resource set is determined by the first terminal device according to the candidate resource granularity when the second terminal device selects the resource, and/or, the first terminal device according to Determining the indication of one or more side link control information when the first terminal device performs resource sensing;

The signal strength corresponding to the resource in the resource set is the signal strength of the demodulation reference signal in the physical sidelink control channel or the physical sidelink shared channel corresponding to one or more sidelink control information that contains or overlaps the resource The maximum value among the priorities, the priority corresponding to the resource is the minimum value among the priorities indicated by the one or more side link control information.

It is worth noting that the above only describes each component or module related to the present application, but the present application is not limited thereto. The resource selection apparatus 900 may further include other components or modules, and for the specific content of these components or modules, reference may be made to the related art.

In addition, for the sake of simplicity, FIG. 9 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc. The implementation of this application does not limit this.

It can be known from the above embodiments that, when performing resource selection or reselection, the second terminal device performs resource exclusion on the candidate resources in the candidate resource set according to the resource set sent by the first terminal device. Therefore, the probability of resource collision can be reduced, and the reliability of side link transmission can be increased.

Embodiments of the fourth aspect

Embodiments of the present application provide a resource selection apparatus. The apparatus may be, for example, a terminal device (eg, the aforementioned second terminal device), or one or some components or components configured in the terminal device, and the same content as the embodiment of the second aspect will not be repeated.

FIG. 10 is a schematic diagram of a resource selection apparatus according to an embodiment of the present application. As shown in FIG. 10 , the resource selection apparatus 1000 includes:

Determining unit 1001, which determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal the signal strength of the device; and

Excluding unit 1002, which, when performing resource selection or reselection, determines candidate resources in the candidate resource set that overlap with resources indicated or reserved by the third terminal device according to the distance or position or the signal strength is excluded.

In some embodiments, when the distance between the first terminal device and the third terminal device is greater than a first threshold value, or the first terminal device and the third terminal device are located in different areas Down,

The exclusion unit 1002 replaces the signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device with the signal strength corresponding to the resource reported by the first terminal device,

Alternatively, the exclusion unit 1002 determines that the resource does not trigger resource preemption or resource re-evaluation,

Alternatively, the exclusion unit 1002 determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle, that is, the candidate resource can be selected.

In some embodiments, the determining unit 1001 determines the first terminal device and the all determine whether the distance between the third terminal equipment is greater than a first threshold value, or determine whether the first terminal equipment and the third terminal equipment are located in different areas.

In some embodiments, the center position of the nearest area indicated by the location information or area identification in the set of sidelink control information or resources from the first terminal device and the sidelink from the third terminal device In the case where the distance between the center positions of the nearest area indicated by the position information in the control information is greater than a predetermined distance or the communication range requirement in the side link control information, determine that the first terminal device and the third The distance between the terminal devices is greater than the first threshold value; and/or,

When the area indicated by the area identifier in the sidelink control information or resource set from the first terminal device is different from the area indicated by the area identifier in the sidelink control information from the third terminal device Next, it is determined that the first terminal device and the third terminal device are located in different areas.

In some embodiments, for the resource indicated or reserved by the side link control information sent by the third terminal device, the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the second gate When the limit value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or when the resource corresponding to the resource sensed by the second terminal device When the signal strength of the resource is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device,

The exclusion unit 1002 determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle, that is, the candidate resource can be selected,

Alternatively, the exclusion unit 1002 replaces the signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device with the signal strength corresponding to the resource reported by the first terminal device;

Alternatively, the exclusion unit 1002 determines that the resource does not trigger resource preemption or resource re-evaluation.

In some embodiments, the determining unit 1001 further determines the priority of the data to be sent and/or the priority corresponding to the resource indicated or reserved by the third terminal device; and

In the case that the priority of the data to be sent is higher than a third threshold value and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold value, and/or Or, when the priority of the data to be sent is higher than the priority corresponding to the resource indicated or reserved by the third terminal device,

The exclusion unit 1002 determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle, that is, the candidate resource can be selected, or the second terminal device perceives The signal strength corresponding to the resource indicated or reserved by the third terminal equipment is replaced with the signal strength corresponding to the resource reported by the first terminal equipment.

It is worth noting that the above only describes each component or module related to the present application, but the present application is not limited thereto. The resource selection apparatus 1000 may also include other components or modules, and for the specific content of these components or modules, reference may be made to related technologies.

In addition, for the sake of simplicity, FIG. 10 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc. The implementation of this application does not limit this.

Embodiments of the Fifth Aspect

An embodiment of the present application further provides a communication system, and reference may be made to FIG. 1 , and the same content as the embodiments of the first aspect to the fourth aspect will not be repeated.

In some embodiments, the communication system 100 may include at least:

the first terminal device 102, which performs resource awareness and generates a resource set for reporting to the second terminal device;

The second terminal device 103, which receives the resource set sent by the first terminal device; and when performing resource selection or reselection, compares the resource set in the candidate resource set according to the resource set sent by the first terminal device. Candidate resources are subject to resource exclusion.

In some embodiments, the communication system 100 may include at least:

The second terminal device 103, which determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal device. Three signal strengths of the terminal equipment; and when performing resource selection or reselection, determining candidates in the candidate resource set that overlap with the resources indicated or reserved by the third terminal equipment according to the distance or location or the signal strength Whether the resource is excluded.

The embodiment of the present application also provides a network device, which may be, for example, a base station, but the present application is not limited to this, and may also be other network devices.

FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in FIG. 11, the network device 1100 may include: a processor 1110 (eg, a central processing unit CPU) and a memory 1120; the memory 1120 is coupled to the processor 1110. The memory 1120 can store various data; in addition, the program 1130 for information processing is also stored, and the program 1130 is executed under the control of the processor 1110 .

In addition, as shown in FIG. 11 , the network device 1100 may further include: a transceiver 1140, an antenna 1150, etc.; wherein, the functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the network device 1100 does not necessarily include all the components shown in FIG. 11 ; in addition, the network device 1100 may also include components not shown in FIG. 11 , and reference may be made to the prior art.

The embodiment of the present application also provides a terminal device, but the present application is not limited to this, and may also be other devices.

FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 12 , the terminal device 1200 may include a processor 1210 and a memory 1220 ; the memory 1220 stores data and programs, and is coupled to the processor 1210 . Notably, this figure is exemplary; other types of structures may be used in addition to or in place of this structure to implement telecommunication functions or other functions.

For example, the processor 1210 may be configured to execute a program to implement the resource selection method described in the embodiment of the first aspect. For example, the processor 1210 may be configured to perform the following controls: receive the resource set sent by the first terminal device; and when performing resource selection or reselection, compare the candidate resource set according to the resource set sent by the first terminal device The candidate resources in the resource are excluded.

For another example, the processor 1210 may be configured to execute a program to implement the resource selection method described in the embodiments of the second aspect. For example, the processor 1210 may be configured to control the following: determine the distance between the first terminal device and the third terminal device, or the positions of the first terminal device and the third terminal device, or the first terminal device and the third terminal device. the signal strength (RSRP) of the terminal equipment and the third terminal equipment; and when performing resource selection or reselection, determining the relationship with the third terminal equipment in the candidate resource set according to the distance or position, or the signal strength Indicates whether candidate resources for which the indicated or reserved resources overlap are excluded.

As shown in FIG. 12 , the terminal device 1200 may further include: a communication module 1230 , an input unit 1240 , a display 1250 , and a power supply 1260 . The functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the terminal device 1200 does not necessarily include all the components shown in FIG. 12 , and the above components are not required; in addition, the terminal device 1200 may also include components not shown in FIG. 12 . There is technology.

An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the resource selection method according to the embodiment of the first aspect.

The embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables the terminal device to execute the resource selection method described in the embodiment of the first aspect.

The embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the resource selection method according to the embodiment of the second aspect.

The embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program causes the terminal device to execute the resource selection method described in the embodiment of the second aspect.

The apparatuses and methods above in the present application may be implemented by hardware, or may be implemented by hardware combined with software. The present application relates to a computer-readable program that, when executed by logic components, enables the logic components to implement the above-described apparatus or constituent components, or causes the logic components to implement the above-described various methods or steps. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.

The method/apparatus described in conjunction with the embodiments of this application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figures and/or one or more combinations of the functional block diagrams may correspond to either software modules or hardware modules of the computer program flow. These software modules may respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by, for example, solidifying these software modules using a Field Programmable Gate Array (FPGA).

A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor, such that the processor can read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and storage medium may reside in an ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) adopts a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

For one or more of the functional blocks and/or one or more combinations of the functional blocks described in the figures, it can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof. One or more of the functional blocks and/or one or more combinations of the functional blocks described with respect to the figures can also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors processor, one or more microprocessors in communication with the DSP, or any other such configuration.

The present application has been described above with reference to the specific embodiments, but those skilled in the art should understand that these descriptions are all exemplary and do not limit the protection scope of the present application. Those skilled in the art can make various variations and modifications to the present application according to the spirit and principles of the present application, and these variations and modifications are also within the scope of the present application.

Regarding the implementations including the above embodiments, the following additional notes are also disclosed:

Addendum 1. A resource selection method, comprising:

Supplement 2. The method according to Supplement 1, wherein the resource set does not include the first resource indicated or reserved by one side link control information (SCI) perceived by the second terminal device In the case of the resource, the second terminal device determines, according to the side link control information, whether a candidate resource in the candidate resource set that overlaps with the first resource is excluded.

Supplement 3. The method according to Supplement 2, wherein, when the signal strength (RSRP) is greater than a signal strength threshold, the second terminal device removes the resource that overlaps with the first resource in the candidate resource set Candidate resource exclusion;

Wherein, the signal strength (RSRP) is the signal strength of the demodulation reference signal (DMRS) in the physical sidelink control channel (PSCCH) or the physical sidelink shared channel (PSSCH) corresponding to the sidelink control information; The signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the priority indicated by the side link control information.

Supplement 4. The method according to Supplement 1, wherein in the case that the resource set includes a second resource indicated or reserved by one side link control information sensed by the second terminal device , the second terminal device determines, according to the resource set and the side link control information, whether candidate resources in the candidate resource set that overlap with the second resource are excluded.

Supplement 5. The method according to Supplement 4, wherein, when the signal strength (RSRP) is greater than a signal strength threshold, the second terminal device, in the candidate resource set, overlaps with the second resource Candidate resource exclusion;

The signal strength (RSRP) is a physical sidelink control channel (PSCCH) or physical sidelink corresponding to the signal strength corresponding to the second resource included in the resource set and the sidelink control information. The maximum value in the signal strength of the demodulation reference signal (DMRS) in the shared channel (PSSCH); the signal strength threshold is indicated by the priority of the data to be sent by the second terminal device and the side link control information Priority is determined.

Supplement 6. The method according to Supplement 1, wherein, in the case that the resource set includes a third resource that is not perceived by the second terminal device, the second terminal device uses the resource according to the The set determines whether candidate resources in the set of candidate resources that overlap with the third resource are excluded.

Supplement 7. The method according to Supplement 6, wherein, when the signal strength (RSRP) is greater than a signal strength threshold, the second terminal device removes the resource overlapping the third resource in the candidate resource set Candidate resource exclusion;

The signal strength (RSRP) is the signal strength corresponding to the third resource included in the resource set; the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the resource set The priority corresponding to the third resource included in is determined.

Supplement 8. The method according to any one of Supplementary Notes 1 to 7, wherein the method further comprises:

In the case that the data to be sent is an aperiodic service, the second terminal device determines whether the candidate resources in the resource selection time period of the second terminal device that overlap with the resources in the resource set are excluded;

In the case that the data to be sent is a periodic service, it is determined whether candidate resources that overlap with the resources in the resource set in the current cycle or in the next or more cycles are excluded.

Supplement 9. The method according to any one of Supplementary Notes 1 to 8, wherein the candidate resources that overlap with the resources perceived by the second terminal device but not included in the resource set are the first type of resources; A candidate resource that overlaps with a resource not perceived by the second terminal device but included in the resource set is a second type of resource; and a resource that is both perceived by the second terminal device and included in the resource set The overlapping candidate resources are the third type of resources.

Supplement 10. The method according to Supplement 9, wherein the resources in the resource set are resources recommended by the first terminal device, and the resource set includes the signal strength (RSRP) corresponding to the resources In the case of , the second terminal device preferentially selects resources in the resource set when performing resource selection or reselection.

Supplement 11. The method according to Supplement 10, wherein the resource granularity of the second terminal device in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection In this case, the resources in the resource set are preferentially selected.

Supplement 12. The method according to Supplement 10, wherein the resource granularity of the second terminal device in the resource set is different from the resource granularity when the second terminal device performs resource selection or reselection In the case of , the candidate resources within the time-frequency range of the resources included in the resource set are preferentially selected, or the candidate resources that overlap with the resources in the resource set are preferentially selected.

Supplementary Note 13. The method according to any one of Supplementary Notes 10 to 12, wherein the method further comprises:

The second terminal device increases the second type of resources and/or the third type of resources when the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement the signal strength threshold and proceed with resource selection or reselection.

Supplement 14. The method according to Supplement 13, wherein the method further comprises:

When the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, the second terminal device increases the signal strength threshold of the first type of resources and continues. Perform resource selection or reselection.

Supplement 15. The method according to Supplement 9, wherein the resources in the resource set are resources not recommended by the first terminal device, and the resource set includes the signal strength (RSRP) corresponding to the resource ), the second terminal device preferentially excludes resources in the resource set when performing resource selection or reselection.

Supplement 16. The method according to Supplement 15, wherein the resource granularity of the second terminal device in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection In this case, the resources in the resource set are preferentially excluded.

Supplement 17. The method according to Supplement 15, wherein the resource granularity of the second terminal device in the resource set is different from the resource granularity when the second terminal device performs resource selection or reselection In the case of , the second terminal device preferentially excludes candidate resources within the time-frequency range of the resources included in the resource set, or preferentially excludes candidate resources that overlap with the resources in the resource set.

Supplementary Note 18. The method according to any one of Supplementary Notes 15 to 17, wherein the method further comprises:

When the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, the second terminal device increases the signal strength threshold of resources other than the resource set and Continue with resource selection or reselection.

Supplement 19. The method according to Supplement 18, wherein the method further comprises:

When the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, the second terminal device increases the signal strength threshold of the resources in the resource set and increases the signal strength threshold of the resources in the resource set. Continue with resource selection or reselection.

Supplement 20. The method according to Supplement 9, wherein, in the case that the resources in the resource set are resources recommended by the first terminal device, the second terminal device determines the second type of resources for free.

Supplement 21. The method according to Supplement 20, wherein the resource set does not include a signal strength (RSRP) corresponding to the resource.

Supplement 22. The method according to Supplement 20, wherein the method further comprises:

In the case where the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, the second terminal device increases the signal strength threshold of the third type of resources and continues the process. Resource selection or reselection.

Supplement 23. The method according to Supplement 22, wherein the method further comprises:

Supplement 24. The method according to Supplement 9, wherein, in the case that the resources in the resource set are resources not recommended by the first terminal device, the second terminal device determines to exclude the second terminal device class resource.

Supplement 25. The method according to Supplement 24, wherein the resource set does not include a signal strength (RSRP) corresponding to the resource.

Supplement 26. The method according to Supplement 24, wherein the method further comprises:

Supplement 27. The method according to Supplement 26, wherein the method further comprises:

When the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, the second terminal device increases the signal strength threshold of the third type of resources and continues. Perform resource selection or reselection.

Supplement 28. The method according to any one of Supplementary Notes 1 to 27, wherein the resource granularity in the resource set is determined by the candidate resource granularity when the first terminal device performs resource selection according to the second terminal device Determined, and/or determined by the first terminal device according to an indication of one or more sidelink control information when the first terminal device performs resource sensing.

Supplement 29. The method according to any one of Supplementary Notes 1 to 28, wherein the signal strength corresponding to the resources in the resource set is the physical signal strength corresponding to one or more side link control information of the included or overlapping resources. The maximum value of the signal strength of the demodulation reference signal (DMRS) in the sidelink control channel (PSCCH) or the physical sidelink shared channel (PSSCH), the priority corresponding to the resource is the one or more sidechains The minimum value among the priorities indicated by the route control information.

Addendum 30. A resource selection method, comprising:

The second terminal device determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal device Signal Strength (RSRP) of ; and

Supplement 31. The method according to Supplement 30, wherein the method further comprises:

The second terminal device receives the resource set reported by the first terminal device, so as to perform resource selection/resource exclusion according to the resource set.

Supplement 32. The method according to Supplement 31, wherein when performing resource selection or reselection, the second terminal device further determines the candidate resource set according to the resource set reported by the first terminal device. Whether candidate resources overlapping the resources indicated or reserved by the third terminal device are excluded.

Supplement 33. The method according to any one of Supplements 30 to 32, wherein the distance between the first terminal device and the third terminal device is greater than a first threshold value, or the first When the terminal device and the third terminal device are located in different areas, the second terminal device replaces the signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device with The signal strength corresponding to the resource reported by the first terminal device.

Supplement 34. The method according to any one of Supplements 30 to 32, wherein the distance between the first terminal device and the third terminal device is greater than a first threshold value, or the first When the terminal device and the third terminal device are located in different areas, the second terminal device determines that the resource does not trigger resource preemption or resource re-evaluation.

Supplement 35. The method according to any one of Supplements 30 to 32, wherein the distance between the first terminal device and the third terminal device is greater than a first threshold value, or the first When the terminal device and the third terminal device are located in different areas, the second terminal device determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle.

Supplement 36. The method according to any one of Supplementary Notes 30 to 35, wherein the second terminal device is based on the side link control information or resource set from the first terminal device and the information from the third terminal side link control information of the device or the location information or area identifier in the resource set to determine whether the distance between the first terminal device and the third terminal device is greater than a first threshold value, or to determine whether the first terminal device Whether a terminal device and the third terminal device are located in different areas.

Supplement 37. The method according to any one of Supplementary Notes 30 to 35, wherein the location information or area identifier of the second terminal device in the sidelink control information or resource set from the first terminal device The distance between the indicated central location of the nearest area and the central location of the nearest area indicated by the side link control information or the location information in the resource set or the area identifier from the third terminal device is greater than the predetermined distance or the In the case of the communication range requirement in the side link control information, it is determined that the distance between the first terminal device and the third terminal device is greater than a first threshold value.

Supplement 38. The method according to any one of Supplements 30 to 35, wherein the second terminal device is indicated by the area identifier in the side link control information or resource set from the first terminal device When the area is different from the area indicated by the area identifier in the side link control information from the third terminal device, it is determined that the first terminal device and the third terminal device are located in different areas.

Supplement 39. The method according to any one of Supplementary Notes 30 to 32, wherein, for the resources indicated or reserved by the side link control information sent by the third terminal device, the second terminal device perceives When the signal strength corresponding to the resource is greater than or equal to the second threshold value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or, In the case that the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device determines the candidate resource The candidate resources in the set that overlap with the resources indicated or reserved by the third terminal device are idle.

Supplement 40. The method according to any one of Supplements 30 to 32, wherein, for the resources indicated or reserved by the side link control information sent by the third terminal device, the second terminal device perceives When the signal strength corresponding to the resource is greater than or equal to the second threshold value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or, In the case that the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device The signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the terminal device is replaced with the signal strength corresponding to the resource reported by the first terminal device.

Supplement 41. The method according to any one of Supplements 30 to 32, wherein, for the resources indicated or reserved by the side link control information sent by the third terminal device, the second terminal device perceives When the signal strength corresponding to the resource is greater than or equal to the second threshold value and/or the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or, In the case that the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device, the second terminal device determines that the resource is not Trigger resource preemption or resource re-evaluation.

Supplement 42. The method according to any one of Supplementary Notes 30 to 41, wherein the method further comprises:

The second terminal device determines the priority of the data to be sent and/or the priority corresponding to the resource indicated or reserved by the third terminal device; and

In the case that the priority of the data to be sent is higher than a third threshold value and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold value, and/or Or, in the case that the priority of the data to be sent is higher than the priority corresponding to the resource indicated or reserved by the third terminal device, the second terminal device determines that the candidate resource set is the same as the third terminal device. The candidate resources whose resources indicated or reserved by the three terminal equipments overlap are idle.

Supplement 43. The method according to any one of Supplementary Notes 30 to 41, wherein the method further comprises:

In the case that the priority of the data to be sent is higher than a third threshold value and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold value, and/or Or, in the case that the priority of the data to be sent is higher than the priority corresponding to the resource indicated or reserved by the third terminal device, the second terminal device The signal strength corresponding to the resource indicated or reserved by the third terminal device is replaced with the signal strength corresponding to the resource reported by the first terminal device.

Supplement 44. The method according to any one of Supplementary Notes 30 to 43, wherein the method further comprises:

the second terminal device determines the distance between the second terminal device and the fourth terminal device, or the location of the fourth terminal device, or the signal strength (RSRP) of the fourth terminal device; and

When the second terminal device performs resource selection or reselection, it is also based on the distance between the second terminal device and the fourth terminal device, or the location of the fourth terminal device, or the fourth terminal device. The signal strength (RSRP) of , determines whether candidate resources in the set of candidate resources that overlap with resources indicated or reserved by the third terminal device are excluded.

Supplement 45. A terminal device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to realize the resource according to any one of Supplementary Notes 1 to 44 Method of choosing.

Claims

A resource selection apparatus, configured in a second terminal device, the apparatus comprising:

a receiving unit, which receives the resource set sent by the first terminal device; and

An exclusion unit, which, when performing resource selection or reselection, performs resource exclusion on candidate resources in the candidate resource set according to the resource set sent by the first terminal device.
The apparatus according to claim 1, wherein in the case that the resource set does not include the first resource indicated or reserved by one side link control information sensed by the second terminal device, according to the The side link control information determines whether candidate resources in the candidate resource set that overlap with the first resource are excluded;

Wherein, when the signal strength is greater than the signal strength threshold, the exclusion unit excludes the candidate resource overlapping the first resource in the candidate resource set; wherein the signal strength is the side link control information The signal strength of the demodulation reference signal in the corresponding physical side link control channel or physical side link shared channel; the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the side link control information The indicated priority is determined.
The apparatus according to claim 1, wherein in the case that the resource set includes a second resource indicated or reserved by one side link control information perceived by the second terminal device, according to the The resource set and the side link control information determine whether candidate resources in the candidate resource set overlapping the second resource are excluded;

Wherein, when the signal strength is greater than a signal strength threshold, the exclusion unit excludes candidate resources in the candidate resource set that overlap with the second resource; wherein the signal strength is a value included in the resource set the signal strength corresponding to the second resource and the maximum value of the signal strength of the demodulation reference signal in the physical sidelink control channel or the physical sidelink shared channel corresponding to the sidelink control information; the signal strength threshold It is determined by the priority of the data to be sent by the second terminal device and the priority indicated by the side link control information.
The apparatus according to claim 1, wherein in the case that the resource set includes a third resource that is not perceived by the second terminal device, determining the candidate resource set that is the same as the selected resource set according to the resource set whether the candidate resources whose third resource overlaps are excluded;

Wherein, when the signal strength is greater than a signal strength threshold, the exclusion unit excludes candidate resources in the candidate resource set that overlap with the third resource; wherein the signal strength is a value included in the resource set the signal strength corresponding to the third resource; the signal strength threshold is determined by the priority of the data to be sent by the second terminal device and the priority corresponding to the third resource included in the resource set.
The apparatus according to claim 1, wherein the exclusion unit is further configured to: in the case that the data to be sent is an aperiodic service, determine that the second terminal equipment overlaps with the resources in the resource set and is in the second terminal device Whether the candidate resources in the resource selection time period are excluded;

In the case that the data to be sent is a periodic service, it is determined whether candidate resources that overlap with the resources in the resource set in the current cycle or in the next or more cycles are excluded.
The apparatus according to claim 1, wherein the candidate resources that overlap with the resources perceived by the second terminal device but not included in the resource set are the first type of resources; The candidate resources that are perceived but included in the resource set overlap the resources of the second type; the candidate resources that overlap with the resources both perceived by the second terminal device and included in the resource set are the third type of resources .
The apparatus according to claim 6, wherein, in the case that the resources in the resource set are resources recommended by the first terminal device, and the resource set includes the signal strength corresponding to the resources, performing the resource When selecting or reselection, the resources in the resource set are preferentially selected;

In the case that the resource granularity in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection, the resources in the resource set are preferentially selected, or, in the resource set, the resources in the resource set are preferentially selected. When the resource granularity is different from the resource granularity when the second terminal device performs resource selection or reselection, the candidate resources within the time-frequency range of the resources included in the resource set are preferentially selected, or the candidate resources that are the same as the selected resources are preferentially selected. A candidate resource whose resources in the resource set overlap.
The apparatus according to claim 7, wherein the exclusion unit is further configured to: in the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the number of the signal strength threshold of the second type of resources and/or the third type of resources and continue to perform resource selection or reselection;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the first type of resources and continue to perform resource selection or reselection .
The apparatus according to claim 6, wherein in the case that the resources in the resource set are resources not recommended by the first terminal device, and the resource set includes the signal strength corresponding to the resources, performing The resources in the resource set are preferentially excluded during resource selection or reselection;

In the case that the resource granularity in the resource set is the same as the resource granularity when the second terminal device performs resource selection or reselection, the resources in the resource set are preferentially excluded, or, in the resource set, the resources in the resource set are preferentially excluded. When the resource granularity is different from the resource granularity when the second terminal device performs resource selection or reselection, the second terminal device preferentially excludes candidate resources within the time-frequency range of the resources included in the resource set , or preferentially exclude candidate resources that overlap with resources in the resource set.
The apparatus according to claim 9, wherein the exclusion unit is further configured to: in the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the number of Signal strength thresholds for resources other than the resource set and proceed with resource selection or reselection;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the resources in the resource set and continue to perform resource selection or reset select.
The apparatus according to claim 6, wherein, when the resources in the resource set are resources recommended by the first terminal device, it is determined that the second type of resources is idle;

In the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the signal strength threshold of the third type of resources and continue to perform resource selection or reselection;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the first type of resources and continue to perform resource selection or reselection .
The apparatus according to claim 6, wherein, in the case that the resources in the resource set are resources not recommended by the first terminal device, it is determined to exclude the second type of resources;

In the case that the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window does not meet the requirement, increase the signal strength threshold of resources other than the resource set and continue to perform resource selection or reset select;

If the ratio of the number of candidate resources in the candidate resource set to the number of all candidate resources in the selection window still does not meet the requirement, increase the signal strength threshold of the third type of resources and continue to perform resource selection or reselection .
The apparatus according to claim 1, wherein the resource granularity in the resource set is determined by the first terminal device according to the candidate resource granularity when the second terminal device performs resource selection, and/or by the The first terminal device determines according to the indication of one or more side link control information when the first terminal device performs resource sensing;

The signal strength corresponding to the resource in the resource set is the signal strength of the demodulation reference signal in the physical sidelink control channel or the physical sidelink shared channel corresponding to one or more sidelink control information that contains or overlaps the resource The priority corresponding to the resource is the minimum value among the priorities indicated by the one or more side link control information.
A resource selection apparatus, configured in a second terminal device, the apparatus comprising:

a determining unit, which determines the distance between the first terminal device and the third terminal device, or the position of the first terminal device and the third terminal device, or the first terminal device and the third terminal device signal strength; and

An exclusion unit, which, when performing resource selection or reselection, determines whether candidate resources in the candidate resource set that overlap with the resources indicated or reserved by the third terminal device are excluded according to the distance or the position or the signal strength .
The apparatus of claim 14, wherein a distance between the first terminal device and the third terminal device is greater than a first threshold value, or the first terminal device and the third terminal device in different regions,

The exclusion unit replaces the signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device with the signal strength corresponding to the resource reported by the first terminal device,

Alternatively, the exclusion unit determines that the resource does not trigger resource preemption or resource re-evaluation,

Alternatively, the exclusion unit determines that the candidate resources in the candidate resource set that overlap with the resources indicated or reserved by the third terminal device are idle.
The apparatus according to claim 15, wherein the determining unit is based on the resource set of side link control information or report from the first terminal device and the side link control information or report from the third terminal device to determine whether the distance between the first terminal device and the third terminal device is greater than the first threshold value, or to determine whether the distance between the first terminal device and the third terminal device is greater than the first threshold value. Whether the three terminal devices are located in different areas.
17. The apparatus of claim 16, wherein the center position of the nearest area indicated by the location information or the area identifier in the sidelink control information or resource set from the first terminal device and the center position from the third terminal Determine if the distance between the center positions of the nearest area indicated by the side link control information of the device or the location information in the resource set or the area identifier is greater than the predetermined distance or the communication range requirement in the side link control information The distance between the first terminal device and the third terminal device is greater than a first threshold value; and/or,

The area indicated by the area identifier in the sidelink control information or resource set from the first terminal device and the area indicated by the area identifier in the sidelink control information or resource set from the third terminal device In different cases, it is determined that the first terminal device and the third terminal device are located in different areas.
The apparatus according to claim 14, wherein, for the resource indicated or reserved by the side link control information sent by the third terminal device, the signal strength corresponding to the resource sensed by the second terminal device is greater than or equal to the second threshold value and/or when the signal strength corresponding to the resource reported by the first terminal device is less than the second threshold value, and/or when the second terminal device senses When the signal strength corresponding to the resource is greater than or equal to the signal strength corresponding to the resource reported by the first terminal device,

The exclusion unit determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle,

Alternatively, the exclusion unit replaces the signal strength corresponding to the resource indicated or reserved by the third terminal device sensed by the second terminal device with the signal strength corresponding to the resource reported by the first terminal device;

Alternatively, the exclusion unit determines that the resource does not trigger resource preemption or resource re-evaluation.
The apparatus according to claim 14, wherein the determining unit further determines the priority of the data to be sent and/or the priority corresponding to the resource indicated or reserved by the third terminal device; and

In the case that the priority of the data to be sent is higher than a third threshold value and/or the priority corresponding to the resource indicated or reserved by the third terminal device is lower than the third threshold value, and/or Or, when the priority of the data to be sent is higher than the priority corresponding to the resource indicated or reserved by the third terminal device,

The exclusion unit determines that the candidate resource in the candidate resource set that overlaps with the resource indicated or reserved by the third terminal device is idle, or indicates the third terminal device sensed by the second terminal device. Or the signal strength corresponding to the reserved resource is replaced with the signal strength corresponding to the resource reported by the first terminal device.
A communication system comprising:

a first terminal device, which performs resource awareness and generates a resource set for reporting to the second terminal device;

A second terminal device, which receives the resource set sent by the first terminal device; and when performing resource selection or reselection, selects a candidate resource set according to the resource set sent by the first terminal device. resource for resource exclusion.