WO2024138343A1

WO2024138343A1 - Resource selection method and apparatus, sidelink communication method and apparatus, device and storage medium

Info

Publication number: WO2024138343A1
Application number: PCT/CN2022/142100
Authority: WO
Inventors: 丁伊; 赵振山; 张世昌; 马腾
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2024-07-04

Abstract

A resource selection method and apparatus, a sidelink communication method and apparatus, a device and a storage medium, relating to the technical field of communications. The resource selection method comprises: according to a corresponding relationship between a spatial domain transmission filter and a candidate resource set or candidate resources, a terminal device determining a transmission resource corresponding to the first spatial domain transmission filter (910). The method achieves a combination of transmission using spatial domain transmission filters (or referred to as beams) and a resource selection mechanism, so as to allow a sidelink transmission resource selection mechanism to be applicable to high-frequency communications, thus avoiding resource conflicts between terminal devices operating at high frequencies, and improving the reliability of sidelink transmission.

Description

Resource selection method, side communication method, device, equipment and storage medium

Technical Field

The embodiments of the present application relate to the field of communication technology, and in particular to a resource selection method, a side communication method, an apparatus, a device and a storage medium.

Background technique

When the SL (Sidelink) system operates at high frequencies, it is bound to introduce beams (or spatial transmission filters) for transmission and reception. On this basis, further research is needed on SL communication.

Summary of the invention

The embodiments of the present application provide a resource selection method, a side communication method, an apparatus, a device and a storage medium. The technical solution is as follows:

According to one aspect of an embodiment of the present application, a resource selection method is provided, the method being executed by a terminal device, the method comprising:

According to the correspondence between the spatial domain transmission filter and the candidate resource set or the candidate resources, the transmission resource corresponding to the first spatial domain transmission filter is determined.

According to one aspect of an embodiment of the present application, a sideline communication method is provided, the method being executed by a terminal device, the method comprising:

Determining a first time unit according to the selected resource of the terminal device or the side control information received by the terminal device;

A spatial domain transmission filter is used for reception during the first time unit.

According to one aspect of an embodiment of the present application, a resource selection device is provided, the device comprising:

The determination module is used to determine the transmission resources corresponding to the first spatial domain transmission filter according to the corresponding relationship between the spatial domain transmission filter and the candidate resource set or the candidate resources.

According to one aspect of an embodiment of the present application, a side communication device is provided, the device comprising:

A determination module, configured to determine a first time unit according to a selected resource of a terminal device or side control information received by the terminal device;

A receiving module is used to receive using a spatial domain transmission filter within the first time unit.

According to one aspect of an embodiment of the present application, a terminal device is provided, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-mentioned resource selection method or side communication method.

According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is used to be executed by a processor to implement the above-mentioned resource selection method or side communication method.

According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and/or program instructions. When the chip is running, it is used to implement the above-mentioned resource selection method or side communication method.

According to one aspect of an embodiment of the present application, a computer program product is provided, which includes computer instructions stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned resource selection method or side communication method.

The technical solution provided by the embodiments of the present application may have the following beneficial effects:

On the one hand, the terminal device determines the transmission resources corresponding to a certain spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set or the candidate resources, thereby combining the transmission using the spatial transmission filter (or beam) with the resource selection mechanism, making the side transmission resource selection mechanism suitable for high-frequency communication, avoiding resource conflicts between terminal devices working at high frequencies, and improving the reliability of side transmission.

On the other hand, the terminal device determines the first time unit according to the selected resources or the received side control information, and uses the spatial transmission filter for reception within the first time unit, thereby combining the reception using the spatial transmission filter (or beam) with the resource selection mechanism, making the side transmission resource selection mechanism suitable for high-frequency communication, avoiding resource conflicts between terminal devices working at high frequencies, and improving the reliability of side transmission.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

FIG2 is a schematic diagram of a physical layer structure of SL communication provided by an embodiment of the present application;

FIG3 is a schematic diagram of time-frequency resource location reservation provided by an embodiment of the present application;

FIG4 is a schematic diagram of resource monitoring and resource selection provided by an embodiment of the present application;

FIG5 is a schematic diagram of a re-evaluation mechanism provided by an embodiment of the present application;

FIG6 is a schematic diagram of a resource preemption mechanism provided by an embodiment of the present application;

FIG7 is a schematic diagram of a system not using analog beams and a system using analog beams provided by an embodiment of the present application;

FIG8 is a schematic diagram of beam-based transceiver provided by an embodiment of the present application;

FIG9 is a flow chart of a resource selection method provided by an embodiment of the present application;

FIG10 is a schematic diagram of a correspondence between beams and candidate resource sets provided by an embodiment of the present application;

FIG11 is a schematic diagram of a correspondence between beams and candidate resources provided by an embodiment of the present application;

FIG12 is a flow chart of a side communication method provided by an embodiment of the present application;

13 is a schematic diagram of a terminal device determining a time slot corresponding to a receiving beam according to selected resources provided by an embodiment of the present application;

14 is a schematic diagram of a terminal device determining a time slot corresponding to a receiving beam according to received side control information provided by an embodiment of the present application;

FIG15 is a block diagram of a resource selection device provided by an embodiment of the present application;

FIG16 is a block diagram of a side communication device provided by an embodiment of the present application;

FIG. 17 is a schematic diagram of the structure of a terminal device provided in one embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Please refer to FIG1 , which shows a schematic diagram of a network architecture provided by an embodiment of the present application. The network architecture may include: a core network 11 , an access network 12 , and a terminal device 13 .

The core network 11 includes several core network devices. The functions of the core network devices are mainly to provide user connection, user management and service bearing, and to provide an interface to the external network as a bearer network. For example, the core network of the 5G (5th Generation) NR (New Radio) system may include AMF (Access and Mobility Management Function) entity, UPF (User Plane Function) entity and SMF (Session Management Function) entity and other devices.

The access network 12 includes several access network devices 14. The access network in the 5G NR system can be called NG-RAN (New Generation-Radio Access Network). The access network device 14 is a device deployed in the access network 12 to provide wireless communication functions for the terminal device 13. The access network device 14 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in the 5G NR system, it is called gNodeB or gNB. With the evolution of communication technology, the name "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 13 are collectively referred to as access network devices.

The number of terminal devices 13 is usually multiple, and one or more terminal devices 13 can be distributed in each cell managed by an access network device 14. The terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (Mobile Station, MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The access network device 14 and the core network device communicate with each other through some air technology, such as the NG interface in the 5G NR system. The access network device 14 and the terminal device 13 communicate with each other through some air technology, such as the Uu interface. In the embodiments of the present application, the terminal device and UE (User Equipment) express the same meaning, and the two are usually used interchangeably, but those skilled in the art can understand their meanings.

Terminal devices 13 and terminal devices 13 (for example, vehicle-mounted devices and other devices (such as other vehicle-mounted devices, mobile phones, RSU (Road Side Unit), etc.)) can communicate with each other through a direct communication interface (such as a PC5 interface). Accordingly, the communication link established based on the direct communication interface can be called a direct link or SL. SL transmission is the direct communication and data transmission between terminal devices through a side link. Unlike the traditional cellular system in which communication data is received or sent through an access network device, SL transmission has the characteristics of short delay and low overhead, and is suitable for communication between two terminal devices with close geographical locations (such as vehicle-mounted devices and other peripheral devices with close geographical locations). It should be noted that in Figure 1, only the vehicle-to-vehicle communication in the V2X (vehicle to everything) scenario is taken as an example, and SL technology can be applied to scenarios in which various terminal devices communicate directly with each other. In other words, the terminal device in this application refers to any device that communicates using SL technology.

The "5G NR system" in the embodiment of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art may understand its meaning. The technical solution described in the embodiment of the present application may be applicable to a 5G NR system or to a subsequent evolution system of the 5G NR system.

Before introducing the technical solution of this application, some background technical knowledge involved in this application is first introduced and explained. The following related technologies can be combined arbitrarily with the technical solution of the embodiment of this application as optional solutions, and they all belong to the protection scope of the embodiment of this application. The embodiment of this application includes at least part of the following contents.

1.SL transmission

Regarding SL transmission, 3GPP defines two transmission modes: Mode A and Mode B.

Mode A: The transmission resources of the terminal device are allocated by the access network device (such as a base station). The terminal device transmits communication data on the side link according to the transmission resources allocated by the access network device. The access network device can allocate transmission resources for a single transmission to the terminal device, or allocate transmission resources for a semi-static transmission to the terminal device.

Mode B: The terminal device selects transmission resources from the resource pool to transmit communication data. Specifically, the terminal device can select transmission resources from the resource pool by listening, or by random selection.

Next, we will mainly introduce the SL communication in the NR V2X system and the method of terminal equipment autonomously selecting resources (that is, the above-mentioned mode B).

2.NR V2X physical layer structure

The physical layer structure of SL communication in the NR V2X system is shown in Figure 2. The first symbol in the time slot shown in Figure 2 is an AGC (Automatic Gain Control) symbol. When the SL UE receives, the receiving power can be adjusted in the symbol to a power suitable for demodulation. When the SL UE transmits, the content of the symbol after the AGC symbol is repeatedly transmitted on the AGC symbol. In Figure 2, PSCCH (Physical Sidelink Control Channel) is used to carry the first sidelink control information, and PSSCH (Physical Sidelink Shared Channel) is used to carry data and the second sidelink control information. PSCCH and PSSCH are sent in the same time slot. The first sidelink control information and the second sidelink control information can be two sidelink control information with different functions. For example, the first sidelink control information is carried in PSCCH, which mainly includes fields related to resource listening, so that other terminal devices can exclude and select resources after decoding. In addition to data, the PSSCH also carries the second side control information, which mainly includes fields related to data demodulation, so that other terminal devices can demodulate the data in the PSSCH. In a certain time slot, there may also be symbols corresponding to the PSFCH, which is used to transmit HARQ feedback information. Depending on the resource pool configuration, the symbols corresponding to the PSFCH may appear once every 1, 2, or 4 time slots. When there is no symbol corresponding to the PSFCH in a time slot, for example, the GAP symbol between the PSSCH and the PSFCH in Figure 2, the AGC used to receive the PSFCH, and the PSFCH symbol are all used to carry the PSSCH. Normally, the last symbol in the time slot is the GP (Guard Period) symbol, i.e., the GAP. In other words, the next symbol after the last symbol carrying the PSSCH or PSFCH is the GP symbol. The SL UE performs transceiver conversion within the GP symbol and does not transmit. When there are PSFCH resources in the time slot, there are also GP symbols between the PSSCH and PSFCH symbols. This is because the UE may transmit on PSSCH and receive on PSFCH, and GP symbols are also needed for transmission and reception conversion.

3. Resource reservation in NR V2X

In the NR V2X system, in the above-mentioned mode B, the terminal device selects transmission resources to send data on its own. Resource reservation is the prerequisite for resource selection.

Resource reservation means that the terminal device sends the first side control information in the PSCCH to reserve the resources to be used next. In the NR V2X system, resource reservation within a TB (Transport Block) is supported, as well as resource reservation between TBs.

As shown in FIG3 , the terminal device sends the first side control information, and uses the "Time resource assignment" and "Frequency resource assignment" fields to indicate the N time-frequency resources of the current TB (including the resources used for the current transmission). Where N≤Nmax, in NR V2X, Nmax is equal to 2 or 3. At the same time, the above N indicated time-frequency resources should be distributed in W time slots. In NR V2X, W is equal to 32. For example, in TB1 shown in FIG3 , the terminal device sends the first side control information in PSCCH while sending the initial transmission data in PSSCH, and uses the above two fields to indicate the time-frequency resource positions of the initial transmission and retransmission 1 (that is, N=2 at this time), that is, the time-frequency resources for retransmission 1 are reserved. Moreover, the initial transmission and retransmission 1 are distributed in 32 time slots in the time domain. Similarly, in TB1 shown in FIG3 , the terminal device uses the first sidelink control information sent in the PSCCH of retransmission 1 to indicate the time-frequency resource locations of retransmission 1 and retransmission 2, and retransmission 1 and retransmission 2 are distributed in 32 time slots in the time domain.

At the same time, when the terminal device sends the first sidelink control information, it uses the "Resource reservation period" field to reserve resources between TBs. For example, in FIG3 , when the terminal device sends the first sidelink control information of the initial transmission of TB1, it uses the "Time resource assignment" and "Frequency resource assignment" fields to indicate the time-frequency resource positions of the initial transmission and retransmission 1 of TB1, which are recorded as {(t ₁ ,f ₁ ),(t ₂ ,f ₂ )}. Among them, t ₁ and t ₂ represent the time domain positions of the initial transmission and retransmission 1 resources of TB1, and f ₁ and f ₂ represent the corresponding frequency domain positions. If the value of the "Resource reservation period" field in the first sidelink control information is 100 milliseconds, then the SCI (Sidelink Control Information) simultaneously indicates the time-frequency resources {(t ₁ +100,f ₁ ),(t ₂ +100,f ₂ )}, and these two resources are used for the transmission of the initial transmission and retransmission 1 of TB2. Similarly, the first side control information sent in TB1 retransmission 1 also reserves the time and frequency resources for TB2 retransmission 1 and retransmission 2 using the "Resource reservation period" field. In NR V2X, the possible values of the "Resource reservation period" field are 0, 1-99, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 milliseconds, which is more flexible than LTE (Long Term Evaluation) V2X. However, in each resource pool, only e values are configured, and the terminal device determines the possible values to be used based on the resource pool used. The e values in the resource pool configuration are recorded as the resource reservation period set M. Exemplarily, e is less than or equal to 16.

In addition, through network configuration or pre-configuration, the above-mentioned reservation between TBs can be activated or deactivated in units of resource pools. When the reservation between TBs is activated, the first side control information includes the "Resource reservation period" field. When the reservation between TBs is deactivated, the first side control information does not include the "Resource reservation period" field. When activating the reservation between TBs, under normal circumstances, before triggering resource reselection, the value of the "Resource reservation period" field used by the terminal device, that is, the resource reservation period, will not change. Each time the terminal device sends the first side control information, it uses the "Resource reservation period" field therein to reserve the resources of the next period for the transmission of another TB, thereby achieving periodic semi-continuous transmission.

When the terminal device operates in the above-mentioned mode B, the terminal device can obtain the first sideline control information sent by other terminal devices by listening to the PSCCH sent by other terminal devices, thereby knowing the resources reserved by other terminal devices. When the terminal device selects resources, it will exclude the resources reserved by other terminal devices to avoid resource collision.

4. Resource selection method for NR V2X listening

In the NR V2X system, in the above mode B, the terminal device needs to select resources by itself.

As shown in FIG4 , the terminal device triggers resource selection or reselection in time slot n or time slot n is the time slot in which the high layer triggers the physical layer to report the candidate resource set. The resource selection window 10 starts from n+T ₁ and ends at n+T _2. 0<=T ₁ <=T _proc,1 , when the subcarrier spacing is 15, 30, 60, 120kHz, T _proc,1 is 3, 5, 9, 17 time slots. _{T 2min} <=T ₂ <=remaining delay budget of the service, the value set of T _2min is {1,5,10,20}*2 ^μ time slots, where μ=0,1,2,3 corresponds to the case where the subcarrier spacing is 15, 30, 60, 120kHz, and the terminal device determines T _2min from the value set according to the priority of its own data to be sent. For example, when the subcarrier spacing is 15kHz, the terminal device determines T _2min from the set {1,5,10,20} according to the priority of its own data to be sent. When T _2min is greater than or equal to the remaining delay budget of the service, T ₂ is equal to the remaining delay budget of the service. The remaining delay budget is the difference between the corresponding time of the data delay requirement and the current time. For example, the delay requirement of a data packet arriving at time slot n is 50 milliseconds. Assuming that a time slot is 1 millisecond, if the current time is time slot n, the remaining delay budget is 50 milliseconds. If the current time is time slot n+20, the remaining delay budget is 30 milliseconds.

The terminal device performs resource listening from nT ₀ to nT _proc,0 (excluding nT _proc,0 ), and the value of T ₀ is 100 or 1100 milliseconds. When the subcarrier spacing is 15, 30, 60, 120kHz, T _proc,0 is 1, 1, 2, 4 time slots. Optionally, the terminal device performs resource listening in the time slot belonging to the resource pool used by it within the resource listening window. Optionally, the terminal device listens to the first side control information sent by other terminal devices in each time slot (except its own transmission time slot). When time slot n triggers resource selection or reselection, the terminal device uses the result of resource listening from nT ₀ to nT _proc,0 .

Step 1: The terminal device uses all available resources in the resource pool used by the terminal device in the resource selection window 10 as resource set A. Any resource in set A is recorded as R(x, y), where x and y indicate the frequency domain position and time domain position of the resource, respectively. The initial number of resources in set A is recorded as M _total . The terminal device excludes resources in resource set A based on the unlistened time slots in the resource listening window 20 (Step 1-1) and/or the resource listening results in the resource listening window 20 (Step 1-2). The terminal device determines whether the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y) overlaps with the time slot determined in Step 1-1 based on the unlistened time slot or the resource determined in Step 1-2 based on the first side control information heard. If so, the resource R(x, y) is excluded from resource set A.

Step 1-1: If the terminal device sends data in time slot _tm within the resource listening window 20 and does not listen, the terminal device will determine the corresponding Q time slots based on the time slot _tm and each allowed resource reservation period in the resource pool used by the terminal device, with the resource reservation period as the interval. If the Q time slots overlap with the resource R(x,y) or a series of periodic resources corresponding to the resource R(x,y), the resource R(x,y) is excluded from the resource set A. The above Q = 1 or

(represents rounding up). Tscal is equal to the value of T ₂ converted to milliseconds. Prx is one of the resource reservation periods allowed by the resource pool used by the terminal device. Optionally, a series of periodic resources corresponding to the resource R(x,y) is R(x,y+j*Ptxlg), j=0,1,2,…,Cresel-1. Among them, Cresel is related to the random count value generated by the terminal device, and Ptxlg is the number after Ptx is converted into logical time slots. Ptx is the resource reservation period of the terminal device. For example, in sub-figure (a) of Figure 4, Cresel is 3, indicating 3 periodic resources corresponding to the resource R(x,y) (including R(x,y)).

For example, in sub-graph (a) in FIG4, the terminal device does not listen in time slot _tm , and excludes resources according to each resource reservation period in the resource reservation period set M in the resource pool configuration used. For a certain resource reservation period 1, assuming that the Q value is calculated as 2, the corresponding Q time slots are the next two time slots marked with horizontal line shadows mapped from time slot _tm in sub-graph (a) of FIG4 with resource reservation period 1 as an interval. For a certain resource reservation period 2, assuming that the Q value is calculated as Q=1, the corresponding Q time slots are the next one time slot marked with dotted shadows mapped from time slot _tm in sub-graph (a) of FIG4 with resource reservation period 2 as an interval.

The terminal device will determine whether the Q time slots corresponding to each reserved period overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). If so, the resource R(x, y) will be excluded from the resource set A.

Optionally, when the resource pool used by the terminal device deactivates the reservation between TBs, the terminal device may not execute the above Step 1-1.

Optionally, after executing Step 1-1, if the remaining resources in resource set A are less than M _total *X, resource set A is initialized to all available resources belonging to the resource pool used by the terminal device in the resource selection window 10 and then executing Step 1-2.

Step 1-2: If the terminal device detects the first sidelink control information transmitted in the PSCCH within the time slot t _m of the resource listening window 20, it measures the SL-RSRP (Sidelink Reference Signal Received Power) of the PSCCH or the SL-RSRP of the PSSCH scheduled by the PSCCH (i.e., the SL-RSRP of the PSSCH sent in the same time slot as the PSCCH).

If the measured SL-RSRP is greater than the SL-RSRP threshold, and the first sideline control information received by the terminal device contains the "Resource reservation period" field, the terminal device will determine the corresponding Q time slots based on the time slot _tm and the resource reservation period carried in the detected first sideline control information, with the resource reservation period as the interval. The terminal device assumes that the first sideline control information with the same content is also received in the Q time slots. The terminal device will determine whether the resources indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the first sideline control information received in time slot _tm and these assumed Q first sideline control information are overlapped with the resource R(x,y) or a series of periodic resources corresponding to the resource R(x,y). If they overlap, the corresponding resource R(x,y) is excluded from the set A. The above Q=1 or

(represents rounding up). Tscal is equal to the value of T ₂ converted to milliseconds. Prx is the resource reservation period carried in the first side control information detected. Optionally, a series of periodic resources corresponding to the resource R(x,y) is R(x,y+j*Ptxlg), j=0,1,2,…,Cresel-1. Among them, Cresel is related to the random count value generated by the terminal device, and Ptxlg is the number after Ptx is converted into logical time slots. Ptx is the resource reservation period of the terminal device. For example, in sub-figure (b) of Figure 4, Cresel is 3, which means 3 periodic resources corresponding to the resource R(x,y) (including R(x,y)).

For example, in sub-figure (b) of FIG4 , when the first sideline control information received by the terminal device includes the "Resource reservation period" field, if the terminal device detects the first sideline control information in the PSCCH on the resource E(v, m) in the time slot t _m , the resource reservation period in the first sideline control information is Prx, and assuming that the Q value is calculated to be 1, the terminal device will assume that the first sideline control information with the same content is also received in the time slot t _m+Prxlg . The terminal device will determine whether the

resources

1, 2, 3, 4, 5, 6 indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the first sideline control information received in the time slot t _m and the first sideline control information assumed to be received in the time slot _{t m+Prxlg} overlap with the resource R(x, y) or a series of periodic resources corresponding to the resource R(x, y). If they overlap and the RSRP condition is met, the resource R(x, y) is excluded from the resource set A.

If the SL-RSRP measured by the terminal device is greater than the SL-RSRP threshold, and the first sideline control information received by the terminal device does not contain the "Resource reservation period" field, the terminal device only determines whether the resources indicated by the "Time resource assignment" and "Frequency resource assignment" fields of the first sideline control information received in time slot _t m overlap with the resource R(x, y) or a series of resources corresponding to the resource R(x, y). If they overlap, the resource R(x, y) is excluded from the resource set A.

For example, in subfigure (b) of Figure 4, when the first sideline control information received by the terminal device does not contain the "Resource reservation period" field, if the terminal device detects the first sideline control information in the PSCCH on the time slot _tm resource E(v,m), the terminal device determines whether the

resources

1, 2, 3 indicated by the "Time resource assignment" and "Frequency resource assignment" fields in the first sideline control information overlap with the resource R(x,y) or a series of periodic resources corresponding to the resource R(x,y). If they overlap and the RSRP condition is met, the resource R(x,y) is excluded from the resource set A.

If the remaining resources in resource set A after the above resource exclusion are less than M _total *X, the SL-RSRP threshold is raised by 3dB and Step 1 is re-executed. The physical layer reports the resource set A after resource exclusion as a candidate resource set to the upper layer.

Step 2: The upper layer randomly selects resources from the reported candidate resource set to send data. That is, the terminal device randomly selects resources from the candidate resource set to send data.

have to be aware of is:

(1) The above RSRP threshold is determined by the priority P1 carried in the PSCCH detected by the terminal device and the priority P2 of the data to be sent by the terminal device. The configuration of the resource pool used by the terminal device includes a SL-RSRP threshold table, which contains the SL-RSRP thresholds corresponding to all priority combinations. The configuration of the resource pool can be network configuration or pre-configured.

For example, as shown in Table 1, assuming that the optional values of the priority levels of P1 and P2 are both 0-7, the SL-RSRP thresholds corresponding to different priority combinations are represented by γ _ij , where i in γ _ij is the value of the priority level P1, and j is the value of the priority level P2.

Table 1: SL-RSRP threshold table

When the terminal device detects the PSCCH sent by other terminal devices, it obtains the priority P1 and the priority P2 of the data to be sent carried in the first sideline control information transmitted in the PSCCH, and determines the SL-RSRP threshold by looking up Table 1.

(2) Whether the terminal device uses the measured PSCCH-RSRP or the PSSCH-RSRP scheduled by the PSCCH to compare with the SL-RSRP threshold depends on the resource pool configuration of the resource pool used by the terminal device. The resource pool configuration can be network configuration or pre-configured.

(3) The possible values of X, X are {20%, 35%, 50%}. The configuration of the resource pool used by the terminal device includes the correspondence between the priority and the above possible values. The terminal device determines the value of X according to the priority of the data to be sent and the correspondence. The resource pool configuration can be configured by the network or pre-configured.

The above introduction is a SL communication method in NR-V2X, that is, the terminal device autonomously selects transmission resources through resource listening and transmits data on the side link. This SL communication method can also be applied to various SL communications such as direct communication between handheld terminals and direct communication between pedestrians and vehicles.

5. Re-evaluation and Pre-emption mechanisms in NR V2X

NR-V2X also supports re-evaluation of resources that have been selected but not indicated by sending the first side control information after completing resource selection.

As shown in FIG5 , resources x, y, z, u, and v are time-frequency resources that the terminal device has selected in time slot n, and resource y is located in time slot m. For resources z and u that the terminal device is about to send the first side control information in resource y for the first indication (resource y has been previously indicated by the first side control information in resource x), the terminal device performs the above Step 1 at least once in time slot mT ₃ , that is, at least in time slot mT ₃ , the resource selection window 10 and the resource listening window 20 are determined as described above, and the above Step 1 is performed to exclude the resources in the resource selection window 10 to obtain a candidate resource set. If resource z and/or u are not in the candidate resource set, the terminal device performs the above Step 2 to reselect the time-frequency resources in resource z and u that are not in the candidate resource set. Depending on the implementation of the terminal device, the terminal device may also reselect any resource that has been selected but not indicated by sending the first side control information, such as any one or more resources among resources z, u, and v. The above T ₃ is equal to T _proc,1 . In FIG5 , the dotted arrow indicates that the first sideways control information indication is about to be sent, and the solid arrow indicates that the first sideways control information indication has been sent.

In addition, NR-V2X also supports resource preemption mechanism. In NR-V2X, the conclusion about resource preemption mechanism is described from the perspective of the preempted terminal. After completing resource selection, the terminal device still continues to listen to the first side control information. If the resource that has been selected and indicated by sending the first side control information meets the following three conditions, it means that the resource is preempted by other terminal devices, and the terminal device triggers resource reselection for the resource:

1. The resource selected and indicated by the terminal device is not in the candidate resource set.

2. The resources indicated in the first sideline control information detected overlap with the resources selected and indicated by the terminal device, and the SL-RSRP of the PSCCH corresponding to the first sideline control information detected or the SL-RSRP of the PSSCH scheduled by the PSCCH is greater than the SL RSRP threshold.

3. The priority carried in the first side control information intercepted is higher than the priority of the data to be sent by the terminal device. Or the priority carried in the first side control information intercepted is higher than the priority of the data to be sent by the terminal device, and the priority carried in the first side control information intercepted is higher than the threshold value U, U depends on the resource pool configuration, and the resource pool can be configured or pre-configured by the network.

As shown in FIG6 , resources w, x, y, z, and v are time-frequency resources that the terminal device has selected in time slot n, and resource x is located in time slot m. For resources x and y that the terminal device is about to send the first side control information indicated on resource x and that have been indicated by the first side control information sent by the terminal device before, the terminal device performs the above Step 1 at least once in time slot mT ₃ , that is, at least in time slot mT ₃ , the resource selection window 10 and the resource listening window 20 are determined as described above, and the above Step 1 is performed to exclude the available resources in the resource selection window 10 to determine the candidate resource set. If resource x and/or y meet the above three conditions, the terminal device performs Step 2 to reselect the time-frequency resources that meet the above three conditions in resources x and y. In addition, after triggering resource reselection, depending on the implementation of the terminal device, the terminal device can reselect any resource that has been selected but not indicated by sending the first side control information, such as any of resources z and v. The above T ₃ is equal to T _proc,1 .

6. Multi-beam system

The design goals of the NR/5G system include high-bandwidth communications in high-frequency bands (e.g., bands above 6 GHz). When the operating frequency becomes higher, the path loss during transmission will increase, thus affecting the coverage capability of the high-frequency system. In order to effectively ensure the coverage of the high-frequency band NR system, an effective technical solution is based on massive antenna arrays (Massive MIMO) to form a shaped beam with greater gain, overcome propagation loss, and ensure system coverage.

Millimeter-wave antenna arrays, due to their shorter wavelengths, smaller antenna array spacing and apertures, can allow more physical antenna arrays to be integrated into a two-dimensional antenna array of limited size. At the same time, due to the limited size of the millimeter-wave antenna array, digital beamforming cannot be used due to factors such as hardware complexity, cost overhead, and power consumption. Instead, analog beamforming is usually used, which can reduce the complexity of device implementation while enhancing network coverage.

In the existing 2/3/4G typical system, a cell (sector) uses a wider beam to cover the entire cell. Therefore, at every moment, UEs within the cell coverage area have the opportunity to obtain transmission resources allocated by the system.

The NR/5G Multi-beam system covers the entire cell with different beams. That is, each beam covers a smaller area, and the effect of multiple beams covering the entire cell is achieved through time sweeping.

Figure 7 shows a schematic diagram of a system without beamforming and one with beamforming. The left sub-figure (a) is a traditional LTE and NR system without beamforming, and the right sub-figure (b) is an NR system with beamforming:

In the left sub-figure (a), the LTE/NR network side uses a wide beam to cover the entire cell, and terminal devices 1-5 can receive network signals at any time.

In contrast, in the right sub-figure (b), the network side uses narrower beams (such as beams 1-4 in the figure), and uses different beams at different times to cover different areas in the cell. For example, at time 1, the NR network side covers the area where terminal device 1 is located through beam 1; at time 2, the NR network side covers the area where terminal device 2 is located through beam 2; at time 3, the NR network side covers the area where

terminal devices

3 and 4 are located through beam 3; at time 4, the NR network side covers the area where terminal device 5 is located through beam 4.

In the right sub-figure (b), because the network uses narrower beams, the transmission energy can be more concentrated, so it can cover a longer distance; at the same time, because the beams are narrow, each beam can only cover a part of the cell, so analog beamforming is "trading time for space."

Analog beamforming can be used not only in network devices but also in terminal devices. At the same time, analog beamforming can be used not only for sending signals (called transmit beam) but also for receiving signals (called receive beam).

Relevant standards are discussing issues related to SL systems operating at high frequencies. When SL systems operate at high frequencies, beams are inevitably introduced, such as using a transmit beam for transmission or a receive beam for reception. As shown in Figure 8, in sub-figure (a), terminal device 1 uses a transmit beam for transmission, and terminal device 2 uses a receive beam for reception. When the transmit beam is aligned with the receive beam, the corresponding gain can be obtained. This mode is more suitable for unicast scenarios. Alternatively, in sub-figure (b), terminal device 1 uses a transmit beam for transmission, and terminal device 2 performs omnidirectional reception. This mode is suitable for broadcast or multicast scenarios.

When the terminal device triggers resource selection, it is possible that the terminal device has not yet determined the beam to be used. At this time, how to determine the candidate resource set for resource selection remains to be further studied. At the same time, which time slots the terminal device uses beams for directional reception and which time slots for omnidirectional reception also need further study.

It should be noted that in this application, the "beam" mentioned is also called "spatial domain transmission filter", and the two express the same meaning. Correspondingly, the "receiving beam" is also called "spatial domain transmission filter for receiving" and the "transmitting beam" is also called "spatial domain transmission filter for transmitting".

Please refer to Figure 9, which shows a flow chart of a resource selection method provided by an embodiment of the present application. The method can be applied to the network architecture shown in Figure 1, for example, the method can be executed by a terminal device. The method may include the following steps 910:

Step 910: The terminal device determines the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set or the candidate resources.

The above step 910 includes two parallel schemes, which are referred to as Scheme 1 and Scheme 2 for ease of explanation.

For Solution 1: the terminal device determines the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set.

In some embodiments, the correspondence between the above-mentioned spatial transmission filters and the candidate resource sets includes: the correspondence between at least one spatial transmission filter and at least one candidate resource set. Exemplarily, one spatial transmission filter corresponds to one candidate resource set. In other words, the correspondence between the spatial transmission filter and the candidate resource set is a one-to-one correspondence. Of course, in some embodiments, multiple (or at least two) spatial transmission filters may correspond to one candidate resource set, which is not limited in this application.

Optionally, the above correspondence may be understood as: a corresponding candidate resource set may be determined according to a spatial transmission filter, and conversely, a corresponding spatial transmission filter may also be determined according to a candidate resource set.

In some embodiments, different candidate resource sets include different candidate resources. For example, there are candidate resource set 1 and candidate resource set 2, candidate resource set 1 and candidate resource set 2 are two different candidate resource sets, the candidate resources included in candidate resource set 1 do not belong to candidate resource set 2; similarly, the candidate resources included in candidate resource set 2 do not belong to candidate resource set 1. In other words, there are no identical or overlapping candidate resources in different candidate resource sets. Of course, in some other embodiments, there may also be identical or overlapping candidate resources in different candidate resource sets, and this application does not limit this.

In some embodiments, the terminal device initializes at least one candidate resource set based on the candidate resources in the resource selection window, each candidate resource set including at least one candidate resource. The terminal device excludes resources from the at least one candidate resource set based on the listening result and/or the non-listening time unit in the resource listening window.

Exemplarily, the terminal device initializes multiple candidate resource sets based on the candidate resources in the resource selection window, and each candidate resource set includes at least one candidate resource. Optionally, a spatial transmission filter corresponds to a candidate resource set, and different spatial transmission filters correspond to different candidate resource sets. Optionally, different candidate resource sets include different candidate resources. The terminal device performs resource exclusion on the above-mentioned multiple candidate resource sets based on the listening results and/or non-listening time units in the resource listening window. Optionally, resource exclusion on the above-mentioned multiple candidate resource sets includes: excluding multiple candidate resource sets respectively according to the listening results and/or non-listening time units. That is, for each candidate resource set in the multiple candidate resource sets, resource exclusion according to the listening results and/or non-listening time units is performed respectively.

Exemplarily, the terminal device excludes resources from at least one of the above-mentioned candidate resource sets according to the listening results and/or unlistened time units in the resource listening window, which can be as follows: any candidate resource in any candidate resource set is recorded as R(x, y), and x and y respectively indicate the frequency domain position and time domain position of the candidate resource. The terminal device excludes the candidate resources in the candidate resource set (i.e., the candidate resource set to which R(x, y) belongs) according to the listening results and/or unlistened time units in the resource listening window. The terminal device determines whether the candidate resource R(x, y) or a series of periodic resources corresponding to the candidate resource R(x, y) overlaps with the resource determined according to the first side control information detected and meeting the RSRP threshold condition or the time unit determined according to the unlistened time unit. If there is an overlap, the candidate resource R(x, y) is excluded from the candidate resource set. For specific details, please refer to the above description, which will not be repeated here. In addition, the above-mentioned "time unit" can be a time slot, a subframe, or other time units, which is not limited in this application. For the "time unit" mentioned elsewhere in this article, you can refer to this explanation and will not repeat it.

In some embodiments, for any candidate resource set, when the number of candidate resources remaining in the candidate resource set after resource exclusion is less than the first threshold value, the first signal quality threshold is raised, the candidate resource set is reinitialized, and the candidate resource set is re-excluded. Optionally, the first threshold value is E*M _total , where M _total is the initial number of candidate resources in the candidate resource set, and E is greater than 0 and less than 1. Optionally, E is configured by the network, or pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device. The E corresponding to each candidate resource set may be the same or different. The M _total corresponding to each candidate resource set may be the same or different. In addition, the above-mentioned first signal quality threshold may be a first RSRP threshold, or other thresholds related to channel quality, which is not limited in this application.

In some embodiments, the terminal device determines the transmission resources corresponding to the first spatial domain transmission filter according to the correspondence between the spatial domain transmission filter and the candidate resource set, including: the terminal device determines the first spatial domain transmission filter, and selects the transmission resources corresponding to the first spatial domain transmission filter from the candidate resource set corresponding to the first spatial domain transmission filter. In this embodiment, the terminal device first determines the first spatial domain transmission filter, and the first spatial domain transmission filter can be any spatial domain transmission filter, and selects the transmission resources corresponding to the first spatial domain transmission filter from the candidate resource set corresponding to the first spatial domain transmission filter according to the correspondence between the spatial domain transmission filter and the candidate resource set. For example, the terminal device randomly selects a candidate resource from the candidate resource set corresponding to the first spatial domain transmission filter after resource exclusion as the transmission resource corresponding to the first spatial domain transmission filter.

In some embodiments, the terminal device determines the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set, including: the terminal device selects candidate resources from each candidate resource set to obtain the correspondence between the spatial transmission filter and the selected candidate resource; after determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resource, the transmission resource corresponding to the first spatial transmission filter is determined. In this embodiment, the terminal device first selects candidate resources from each candidate resource set after resource exclusion, for example, randomly selects candidate resources, and obtains the correspondence between the spatial transmission filter and the selected candidate resource. After determining the first spatial transmission filter, the first spatial transmission filter can be any spatial transmission filter, and the terminal device determines the transmission resource corresponding to the first spatial transmission filter based on the correspondence between the spatial transmission filter and the selected candidate resource. For example, the terminal device determines the selected candidate resource corresponding to the first spatial transmission filter as the transmission resource corresponding to the first spatial transmission filter. Alternatively, the terminal device randomly selects a candidate resource from the selected candidate resource corresponding to the first spatial transmission filter as the transmission resource corresponding to the first spatial transmission filter.

Exemplarily, the first spatial domain transmission filter is a spatial domain transmission filter used by the terminal device for data transmission or sending.

Exemplarily, as shown in FIG10 , the terminal device determines a resource selection window of n+T ₁ to n+T ₂ , and a resource listening window of nT ₀ to nT _proc,0. Time slot n is the time slot in which the terminal device triggers resource selection or reselection or the higher layer triggers the physical layer to report the candidate resource set. For other parameters, see the above description. The terminal device initializes a candidate resource set for transmit beam 1, denoted as set A (set A), and set A includes candidate resources in the resource selection window. The terminal device excludes resources from set A according to the listening results and/or unlistened time slots in the resource listening window. If the remaining resources after set A is excluded are less than E*M _total , the RSRP threshold is raised by 3dB, and set A is initialized to exclude set A again until the remaining resources after exclusion are greater than or equal to E*M _total , where E is configured by the network and M _total is the initial number of candidate resources in set A. Similarly, the terminal device initializes a candidate resource set for transmit beam 2, denoted as set B (set B), and similarly excludes its resources. For transmit beam 3 and set C, transmit beam 4 and set D, the operations are the same as those of set A above and will not be repeated here. The terminal device finally obtains the excluded set AD corresponding to the four transmit beams. Optionally, assuming that the transmit beam finally determined by the terminal device is beam 4, the terminal device randomly selects transmission resources in the excluded set D. Optionally, the terminal devices randomly select candidate resources in set AD, then transmit beams 1-4 each correspond to a selected candidate resource. Assuming that the transmit beam finally determined by the terminal device is beam 4, the selected candidate resource corresponding to beam 4 can be determined as the transmission resource corresponding to beam 4.

For Solution 2: the terminal device determines the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resources.

In some embodiments, the correspondence between the spatial transmission filter and the candidate resources includes: one spatial transmission filter corresponds to at least one candidate resource. That is, one spatial transmission filter may correspond to one candidate resource or to multiple candidate resources.

Optionally, the above correspondence may be understood as: the corresponding candidate resource may be determined according to the spatial transmission filter, and conversely, the corresponding spatial transmission filter may also be determined according to the candidate resource.

In some embodiments, different spatial transmission filters correspond to different candidate resources. For example, there are spatial transmission filter 1 and spatial transmission filter 2, and spatial transmission filter 1 and spatial transmission filter 2 are two different spatial transmission filters. The candidate resources corresponding to spatial transmission filter 1 are different from the candidate resources corresponding to spatial transmission filter 2, or in other words, the candidate resources corresponding to spatial transmission filter 1 and the candidate resources corresponding to spatial transmission filter 2 do not have the same or overlapping candidate resources. Of course, in some other embodiments, the candidate resources corresponding to different spatial transmission filters may also have the same or overlapping partial candidate resources, and this application does not limit this.

In some embodiments, the terminal device initializes a candidate resource set according to the candidate resources in the resource selection window, and the candidate resource set includes at least one candidate resource. The terminal device excludes resources from the candidate resource set according to the listening result and/or the non-listening time unit in the resource listening window. It can be understood that the resource exclusion of the candidate resource set means excluding the candidate resources corresponding to each spatial transmission filter.

Exemplarily, the terminal device excludes resources from the candidate resource set based on the listening results and/or unlistened time units within the resource listening window, as follows: any candidate resource in the candidate resource set is denoted as R(x,y), where x and y respectively indicate the frequency domain position and time domain position of the candidate resource. The terminal device excludes candidate resources from the candidate resource set based on the listening results and/or unlistened time units within the resource listening window. The terminal device determines whether the candidate resource R(x,y) or a series of periodic resources corresponding to the candidate resource R(x,y) overlaps with the resource determined based on the first side control information detected and meeting the RSRP threshold condition or the time unit determined based on the unlistened time unit. If there is an overlap, the candidate resource R(x,y) is excluded from the candidate resource set. For specific details, please refer to the above description, which will not be repeated here.

In some embodiments, for any spatial transmission filter, when the number of remaining candidate resources corresponding to the spatial transmission filter after resource exclusion is less than the second threshold value, the second signal quality threshold is raised, the candidate resource set is reinitialized, or the candidate resources corresponding to the spatial transmission filter are reinitialized, and the candidate resource set is re-excluded. Optionally, the second threshold value is F*M _total , M _total is the initial number of candidate resources corresponding to the spatial transmission filter, and F is greater than 0 and less than 1. Optionally, F is configured by the network, or preconfigured, or is a preset value specified by the standard, or depends on the implementation of the terminal device. Optionally, the second threshold value is W, and W is a positive integer. Optionally, W is configured by the network, or preconfigured, or is a preset value specified by the standard, or depends on the implementation of the terminal device. The F corresponding to each spatial transmission filter may be the same or different. The M _total corresponding to each spatial transmission filter may be the same or different. The W corresponding to each spatial transmission filter may be the same or different. In addition, the above-mentioned second signal quality threshold may be a second RSRP threshold, or other thresholds related to channel quality, which is not limited in this application.

In some embodiments, the terminal device determines the transmission resources corresponding to the first spatial domain transmission filter according to the correspondence between the spatial domain transmission filter and the candidate resources, including: the terminal device determines the first spatial domain transmission filter, and selects the transmission resources corresponding to the first spatial domain transmission filter from the candidate resources corresponding to the first spatial domain transmission filter. In this embodiment, the terminal device first determines the first spatial domain transmission filter, and the first spatial domain transmission filter can be any spatial domain transmission filter, and selects the transmission resources corresponding to the first spatial domain transmission filter from the candidate resources corresponding to the first spatial domain transmission filter according to the correspondence between the spatial domain transmission filter and the candidate resources. For example, the terminal device randomly selects a candidate resource from the candidate resources corresponding to the first spatial domain transmission filter after resource exclusion as the transmission resource corresponding to the first spatial domain transmission filter.

In some embodiments, the terminal device determines the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resources, including: the terminal device selects candidate resources from the candidate resources corresponding to each spatial transmission filter, and obtains the correspondence between the spatial transmission filter and the selected candidate resources; after determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resources, the transmission resources corresponding to the first spatial transmission filter are determined. In this embodiment, the terminal device first selects candidate resources from the candidate resources corresponding to each spatial transmission filter after resource exclusion, such as randomly selecting candidate resources, to obtain the correspondence between the spatial transmission filter and the selected candidate resources. After determining the first spatial transmission filter, the first spatial transmission filter can be any spatial transmission filter, and the terminal device determines the transmission resources corresponding to the first spatial transmission filter based on the correspondence between the spatial transmission filter and the selected candidate resources. For example, the terminal device determines the selected candidate resources corresponding to the first spatial transmission filter as the transmission resources corresponding to the first spatial transmission filter. Or, the terminal device randomly selects candidate resources from the selected candidate resources corresponding to the first spatial transmission filter as the transmission resources corresponding to the first spatial transmission filter.

Exemplarily, as shown in FIG11 , the terminal device determines a resource selection window of n+T ₁ to n+T ₂ , and a resource listening window of nT ₀ to nT _proc,0. Time slot n is the time slot in which the terminal device triggers resource selection or reselection or the high layer triggers the physical layer to report the candidate resource set. For other parameters, see the above description. The terminal device initializes the candidate resource set set A (set A), which includes the candidate resources in the resource selection window. As shown in FIG11 , set A includes candidate resources corresponding to beams 1-4, and the candidate resources corresponding to beams 1-4 are different from each other. The terminal device excludes resources from set A according to the listening results and/or unlistened time slots in the resource listening window. If the number of remaining candidate resources corresponding to beam 1 after exclusion is less than a threshold value W, W is based on the network configuration or pre-configuration or depends on the terminal implementation. Optionally, the terminal device raises the RSRP threshold by 3dB, initializes set A, that is, initializes the candidate resources corresponding to beams 1-4, and re-excludes resources from set A. Optionally, the terminal device raises the RSRP threshold by 3dB, initializes the candidate resources corresponding to beam 1, that is, set A includes the candidate resources corresponding to beam 1, and the candidate resources that are not excluded from the candidate resources corresponding to beams 2-4, and continues to exclude resources from set A. The terminal device may repeat the above exclusion operation until at least the number of remaining candidate resources corresponding to beam 1 is greater than or equal to the threshold W. Finally, set A includes the remaining candidate resources corresponding to beams 1-4. Optionally, assuming that the terminal device finally determines the transmission beam to be beam 4, the terminal device randomly selects transmission resources from the remaining candidate resources corresponding to beam 4. Optionally, the terminal device randomly selects candidate resources from the remaining candidate resources corresponding to beams 1-4, then transmission beams 1-4 each correspond to the selected candidate resources. Assuming that the terminal device finally determines the transmission beam to be beam 4, the selected candidate resources corresponding to beam 4 can be determined as the transmission resources corresponding to beam 4.

The technical solution provided in the embodiment of the present application determines the transmission resources corresponding to a certain spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set or the candidate resources by the terminal device, thereby combining the transmission using the spatial transmission filter (or beam) with the resource selection mechanism, making the side transmission resource selection mechanism suitable for high-frequency communication, avoiding resource conflicts between terminal devices working at high frequencies, and improving the reliability of side transmission.

Please refer to Figure 12, which shows a flow chart of a side communication method provided by an embodiment of the present application. The method can be applied to the network architecture shown in Figure 1, for example, the method can be executed by a terminal device. The method may include at least one of the following steps 1210 to 1220:

Step 1210: The terminal device determines the first time unit according to the selected resources or the received side control information.

Step 1220: The terminal device uses a spatial domain transmission filter for reception within a first time unit.

In some embodiments, the selected resource refers to the selected resource of the terminal device. The received side control information refers to the side control information received by the terminal device. The receiving can also be understood as listening. For example, in the scenario of resource listening, receiving the side control information can be understood as listening to the side control information.

In some embodiments, the first time unit is the Mth time unit before the selected resource and the time unit within the first time period before the selected resource, and M is a positive integer. Exemplarily, the first time unit is the Mth time unit before the selected resource belonging to the resource pool and the time unit within the first time period before the selected resource belonging to the resource pool. For the convenience of the following description, it is recorded as option 1 here.

Optionally, taking the time unit as a time slot, and the first time unit as the first time slot as an example, the first time slot is the Mth time slot before the selected resource, and the time slot within the first time length before the selected resource, where M is a positive integer. Alternatively, the first time slot is the Mth time slot before the selected resource that belongs to the resource pool, and the time slot within the first time length before the selected resource that belongs to the resource pool.

In some embodiments, the first time unit is a time unit within the first time length before the selected resource from the second time unit. Exemplarily, the first time unit is a time unit belonging to the resource pool within the first time length before the selected resource from the second time unit. The second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a candidate resource set. For the convenience of the following description, it is recorded as option 2 here.

Optionally, the time unit is a time slot, the first time unit is a first time slot, the second time unit is a time slot n, and time slot n is a time slot for triggering resource selection, or triggering resource reselection, or a high-level triggering physical layer to report a candidate resource set. The first time slot is a time slot within the first time length before the selected resource from time slot n. Alternatively, the first time slot is a time slot belonging to the resource pool within the first time length before the selected resource from time slot n.

Exemplarily, the first duration is T _proc,0 or T _proc,1 or T _proc,0 +T _proc,1 . Exemplarily, the first duration is the length of a physical time slot.

Exemplarily, M is equal to 31 or 32.

Exemplarily, whether the above-mentioned first time unit is determined according to option 1 or option 2 depends on the time domain positions of the Mth time unit belonging to the resource pool and the second time unit before the selected resource. When the time domain position of the Mth time unit belonging to the resource pool is later, option 1 is adopted, and when the time domain position of the second time unit is later, option 2 is adopted.

Exemplarily, the spatial domain transmission filter used for receiving in the first time unit covers the spatial domain transmission filter used for sending on the selected resources. For example, a receive beam is used for reception in the first time slot, and the receive beam can cover the transmit beam used by the terminal device. Optionally, the receive beam covers the transmit beam, which may also mean that the width of the receive beam is greater than or equal to the width of the transmit beam. Exemplarily, as shown in Figure 13, the receive beam of the terminal device is shown as filled with vertical lines in the figure, and the transmit beam is shown as filled with dots in the figure, and the receive beam covers the transmit beam.

Exemplarily, there is a corresponding relationship between the spatial domain transmission filter (or transmission beam) used by the terminal device for sending and the spatial domain transmission filter (or reception beam) used for receiving. The corresponding relationship can be one-to-one, or many-to-one, or one-to-many, or many-to-many, and this application does not limit this. The spatial domain transmission filter used for receiving in the first time unit is the spatial domain transmission filter used for receiving corresponding to the spatial domain transmission filter used by the terminal device for sending. For example, a receiving beam is used for reception in the first time slot, and the receiving beam is the receiving beam corresponding to the transmitting beam of the terminal device. For example, the transmitting beam of the terminal device is a beam used for transmitting on selected resources.

Exemplarily, the selected resources do not include initial transmission resources selected by the terminal device.

Exemplarily, as shown in FIG13, resources x, y, and z are selected resources of the terminal device, and time slot n is a time slot that triggers resource selection or the high-level triggers the physical layer to report a set of candidate resources. The terminal device uses a receiving beam for reception in the first time slot, and the receiving beam can cover the transmitting beam used by the terminal device on resources x, y, and z. The first time slot includes: time slots belonging to the resource pool from time slot n to the first time length before resource x; time slots belonging to the resource pool from the Mth time slot before resource y to the first time length before resource y; time slots belonging to the resource pool from the Mth time slot before resource z to the first time length before resource z. In other words, as shown in FIG13, the first time slot includes time slots belonging to the resource pool in the slash-filled area. It should be noted that there may be time slots that do not belong to the resource pool in the slash-filled area. For the Mth time slot belonging to the resource pool before the selected resource, the time slot refers to the time slot from the time slot where the selected resource is located, which is continuously calculated to the Mth time slot belonging to the resource pool in the time slot set of the resource pool.

Optionally, the terminal device adopts omnidirectional transmission on resource x, i.e., the initial transmission resource. Therefore, the terminal device adopts a receiving beam for reception in the first time slot, and the first time slot only includes the time slots belonging to the resource pool in the area filled with the slashes before resources y and z.

In the example shown in FIG13 , before the terminal device wants to use a transmit beam to transmit in a certain direction, it first listens in that direction to obtain the side control information in that direction so as to determine the resource to avoid conflict. To this end, the terminal device can adopt the above method to determine the time unit corresponding to the receive beam used for resource listening, and then use the receive beam to receive the side control information within the determined time unit.

In some embodiments, the terminal device determines the first time unit based on the selected resources or the received side control information, including: when it is determined that the receiving end of the data scheduled by the first side control information includes the terminal device according to the second side control information scheduled by the first side control information, the terminal device determines the time unit where the retransmission resources indicated by the first side control information are located as the first time unit. The first side control information is the side control information carried on the PSCCH, and the first side control information mainly includes the domain related to resource listening. The second side control information is the side control information carried on the PSSCH, and the second side control information mainly includes the domain related to data demodulation. Exemplarily, the first side control information is used to indicate the resources for SL transmission, such as for indicating the resources that need to be reserved. For detailed descriptions of the first side control information and the second side control information, please refer to the above.

Optionally, the spatial domain transmission filter used for reception in the first time unit is indicated by the first sidelink control information or the second sidelink control information scheduled by the first sidelink control information.

Exemplarily, when it is determined according to the second sideline control information scheduled by the first sideline control information that the receiving end of the data scheduled by the first sideline control information includes the terminal device, the terminal device determines the time slot where the retransmission resource indicated by the first sideline control information is located as the first time slot. Optionally, the receiving beam in the first time slot is indicated by the first sideline control information or the second sideline control information scheduled by the first sideline control information.

Exemplarily, as shown in FIG14 , the terminal device receives the first side control information and the second side control information and data scheduled by it in resource x. For example, the terminal device determines whether the terminal device is the receiving end of the data according to the transmission type Casttype indication field or the destination ID indication field in the second side control information. Optionally, if the transmission type indication field is broadcast, the terminal device is the receiving end of the data. Optionally, if the destination ID matches the terminal device, the terminal device is the receiving end of the data. If the terminal device determines that the receiving end of the data includes the terminal device according to the second side control information, the terminal device uses a receiving beam to receive in the time slot (time slot m and k) where the retransmission resources (resources y and z) indicated by the first side control information are located. Optionally, the above-mentioned receiving beam is indicated by the first side control information or the second side control information.

In the example shown in FIG14 , when the terminal device determines, based on the second side row control information scheduled by the first side row control information, that the receiving end of the data scheduled by the first side row control information includes the terminal device, the terminal device uses a receiving beam to receive in the time slot where the retransmission resource indicated by the first side row control information is located, thereby realizing data reception using a receiving beam.

The technical solution provided in the embodiment of the present application determines the first time unit through the terminal device according to the selected resources or the received side control information, and uses the spatial transmission filter for reception within the first time unit, thereby combining the reception using the spatial transmission filter (or beam) with the resource selection mechanism, making the side transmission resource selection mechanism suitable for high-frequency communication, avoiding resource conflicts between terminal devices operating at high frequencies, and improving the reliability of side transmission.

It should be noted that the above-mentioned embodiments of the resource selection method and the embodiments of the sideline communication method can be combined. For example, in the first time unit within the resource listening window of the previous embodiment, the terminal device uses a spatial transmission filter for reception, and the first time unit can be determined according to the latter embodiment.

The following are device embodiments of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

Please refer to Figure 15, which shows a block diagram of a resource selection device provided by an embodiment of the present application. The device has the function of implementing the above-mentioned resource selection method example, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the terminal device introduced above, or it can be set in the terminal device. As shown in Figure 15, the device 1500 may include: a determination module 1510.

The determination module 1510 is used to determine the transmission resources corresponding to the first spatial transmission filter according to the correspondence between the spatial transmission filter and the candidate resource set or the candidate resources.

In some embodiments, the correspondence between the spatial transmission filter and the candidate resource set includes: one spatial transmission filter corresponds to one candidate resource set.

In some embodiments, different candidate resource sets include different candidate resources.

In some embodiments, as shown in Figure 15, the device 1500 also includes an exclusion module 1520, which is used to: initialize at least one candidate resource set based on the candidate resources within the resource selection window, each candidate resource set including at least one candidate resource; and exclude resources from the at least one candidate resource set based on the listening results and/or non-listening time units within the resource listening window.

In some embodiments, the exclusion module 1520 is also used to raise the first signal quality threshold, reinitialize the candidate resource set, and re-exclude resources from the candidate resource set for any candidate resource set when the number of candidate resources remaining in the candidate resource set after resource exclusion is less than a first threshold value.

In some embodiments, the first threshold value is E*M _total , where M _total is the initial number of candidate resources in the candidate resource set, and E is greater than 0 and less than 1.

In some embodiments, E is configured by the network, or is preconfigured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.

In some embodiments, the determination module 1510 is used to: determine the first spatial domain transmission filter; and select a transmission resource corresponding to the first spatial domain transmission filter from a set of candidate resources corresponding to the first spatial domain transmission filter.

In some embodiments, the determination module 1510 is used to: select candidate resources from each of the candidate resource sets to obtain the correspondence between the spatial domain transmission filter and the selected candidate resources; after determining the first spatial domain transmission filter, determine the transmission resource corresponding to the first spatial domain transmission filter based on the correspondence between the spatial domain transmission filter and the selected candidate resources.

In some embodiments, the correspondence between the spatial transmission filter and the candidate resources includes: one spatial transmission filter corresponds to at least one candidate resource.

In some embodiments, different spatial transmission filters correspond to different candidate resources.

In some embodiments, as shown in Figure 15, the device 1500 also includes an exclusion module 1520, which is used to: initialize a candidate resource set based on the candidate resources in the resource selection window, and the candidate resource set includes at least one candidate resource; and exclude resources from the candidate resource set based on the listening results and/or non-listening time units in the resource listening window.

In some embodiments, the exclusion module 1520 is also used to raise the second signal quality threshold for any spatial transmission filter, reinitialize the candidate resource set, or reinitialize the candidate resources corresponding to the spatial transmission filter, and re-exclude resources from the candidate resource set when the number of remaining candidate resources corresponding to the spatial transmission filter after resource exclusion is less than a second threshold value.

In some embodiments, the second threshold value is F*M _total , where M _total is the initial number of candidate resources corresponding to the spatial domain transmission filter, and F is greater than 0 and less than 1.

In some embodiments, F is configured by the network, or is pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.

In some embodiments, the determination module 1510 is used to: determine the first spatial domain transmission filter; and select a transmission resource corresponding to the first spatial domain transmission filter from candidate resources corresponding to the first spatial domain transmission filter.

In some embodiments, the determination module 1510 is used to: select candidate resources from the candidate resources corresponding to each of the spatial domain transmission filters, and obtain the correspondence between the spatial domain transmission filter and the selected candidate resources; after determining the first spatial domain transmission filter, determine the transmission resource corresponding to the first spatial domain transmission filter based on the correspondence between the spatial domain transmission filter and the selected candidate resources.

Please refer to FIG. 16, which shows a block diagram of a side communication device provided by an embodiment of the present application. The device has the function of implementing the above-mentioned side communication method example, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the terminal device introduced above, or it can be set in the terminal device. As shown in FIG. 16, the device 1600 may include: a determination module 1610 and a receiving module 1620.

The determination module 1610 is used to determine the first time unit according to the selected resources of the terminal device or the side control information received by the terminal device.

The receiving module 1620 is configured to receive using a spatial domain transmission filter within the first time unit.

In some embodiments, the first time unit is the Mth time unit before the selected resource, and the time unit within the first time period before the selected resource, where M is a positive integer.

In some embodiments, the first time unit is the Mth time unit belonging to the resource pool before the selected resource, and the time unit belonging to the resource pool within the first time period before the selected resource.

In some embodiments, the first time unit is a time unit within a first time period from the second time unit to the selected resource; wherein, the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a set of candidate resources.

In some embodiments, the first time unit is a time unit belonging to the resource pool from the second time unit to the first time period before the selected resource; wherein, the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or the high layer triggers the physical layer to report a set of candidate resources.

In some embodiments, the spatial transmission filter used for receiving in the first time unit overrides the spatial transmission filter used for sending on the selected resources.

In some embodiments, the spatial domain transmission filter used for receiving in the first time unit is a spatial domain transmission filter used for receiving that corresponds to the spatial domain transmission filter used for sending by the terminal device.

In some embodiments, the selected resources do not include initial transmission resources selected by the terminal device.

In some embodiments, the determination module 1610 is used to determine the time unit where the retransmission resource indicated by the first side control information is located as the first time unit when it is determined based on the second side control information scheduled by the first side control information that the receiving end of the data scheduled by the first side control information includes the terminal device.

In some embodiments, the spatial domain transmission filter used for reception in the first time unit is indicated by the first sidelink control information or second sidelink control information scheduled by the first sidelink control information.

It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

Regarding the device in the above embodiment, the specific way in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

Please refer to FIG17 , which shows a schematic diagram of the structure of a terminal device provided by an embodiment of the present application. The terminal device 1700 may include: a processor 1701 , a transceiver 1702 , and a memory 1703 .

The processor 1701 includes one or more processing cores. The processor 1701 executes various functional applications and information processing by running software programs and modules.

The transceiver 1702 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as a same wireless communication component, and the wireless communication component may include a wireless communication chip and a radio frequency antenna.

The memory 1703 may be connected to the processor 1701 and the transceiver 1702 .

The memory 1703 may be used to store a computer program executed by the processor, and the processor 1701 is used to execute the computer program to implement each step in the above method embodiment.

In an exemplary embodiment, the processor 1701 is configured to determine the transmission resource corresponding to the first spatial transmission filter according to a correspondence between the spatial transmission filter and the candidate resource set or the candidate resources.

In another exemplary embodiment, the processor 1701 is used to determine a first time unit according to selected resources of the terminal device or sideline control information received by the terminal device; and use a spatial domain transmission filter for reception within the first time unit.

For details not described in detail in this embodiment, please refer to the above embodiments, which will not be described in detail here.

In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned resource selection method, or to implement the above-mentioned side communication method. Optionally, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disks, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

An embodiment of the present application also provides a chip, which includes a programmable logic circuit and/or program instructions. When the chip is running, it is used to implement the above-mentioned resource selection method, or to implement the above-mentioned side communication method.

An embodiment of the present application also provides a computer program product, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned resource selection method, or implement the above-mentioned side communication method.

It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship of indication and being indicated, configuration and being configured, etc.

In some embodiments of the present application, "predefined" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

In some embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, which is not limited in the present application.

The term "multiple" as used herein refers to two or more than two. "And/or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the related objects are in an "or" relationship.

The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order to that shown in the figure. The embodiments of the present application are not limited to this.

Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

A resource selection method, characterized in that the method is executed by a terminal device, and the method comprises:

According to the correspondence between the spatial domain transmission filter and the candidate resource set or the candidate resources, the transmission resource corresponding to the first spatial domain transmission filter is determined.
The method according to claim 1 is characterized in that the correspondence between the spatial domain transmission filter and the candidate resource set includes: one spatial domain transmission filter corresponds to one candidate resource set.
The method according to claim 1 or 2 is characterized in that different candidate resource sets include different candidate resources.
The method according to any one of claims 1 to 3, characterized in that the method further comprises:

Initialize at least one candidate resource set according to the candidate resources in the resource selection window, each candidate resource set including at least one candidate resource;

According to the listening result and/or the non-listening time unit in the resource listening window, the at least one candidate resource set is excluded.
The method according to claim 4, characterized in that the method further comprises:

For any candidate resource set, when the number of candidate resources remaining in the candidate resource set after resource exclusion is less than a first threshold value, the first signal quality threshold is raised, the candidate resource set is reinitialized, and resource exclusion is performed again on the candidate resource set.
The method according to claim 5 is characterized in that the first threshold value is E*M total , M total is the initial number of candidate resources in the candidate resource set, and E is greater than 0 and less than 1.
The method according to claim 6 is characterized in that E is configured by the network, or is pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.
The method according to any one of claims 1 to 7, characterized in that the determining, according to the correspondence between the spatial domain transmission filter and the candidate resource set, the transmission resource corresponding to the first spatial domain transmission filter comprises:

determining the first spatial domain transmission filter;

From the candidate resource set corresponding to the first spatial domain transmission filter, select the transmission resource corresponding to the first spatial domain transmission filter.
The method according to any one of claims 1 to 7, characterized in that the determining, according to the correspondence between the spatial domain transmission filter and the candidate resource set, the transmission resource corresponding to the first spatial domain transmission filter comprises:

Selecting a candidate resource from each of the candidate resource sets to obtain a corresponding relationship between the spatial domain transmission filter and the selected candidate resource;

After determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resources, a transmission resource corresponding to the first spatial transmission filter is determined.
The method according to claim 1 is characterized in that the correspondence between the spatial transmission filter and the candidate resources includes: one spatial transmission filter corresponds to at least one candidate resource.
The method according to claim 1 or 10 is characterized in that different spatial transmission filters correspond to different candidate resources.
The method according to any one of claims 1, 10 to 11, characterized in that the method further comprises:

Initializing a candidate resource set according to the candidate resources in the resource selection window, wherein the candidate resource set includes at least one candidate resource;

The candidate resource set is excluded according to the listening result and/or the non-listening time unit within the resource listening window.
The method according to claim 12, characterized in that the method further comprises:

For any spatial transmission filter, when the number of remaining candidate resources corresponding to the spatial transmission filter after resource exclusion is less than the second threshold value, the second signal quality threshold is raised, the candidate resource set is reinitialized, or the candidate resources corresponding to the spatial transmission filter are reinitialized, and the candidate resources are excluded again for the candidate resource set.
The method according to claim 13 is characterized in that the second threshold value is F*M total , M total is the initial number of candidate resources corresponding to the spatial domain transmission filter, and F is greater than 0 and less than 1.
The method according to claim 14 is characterized in that F is configured by the network, or is pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.
The method according to any one of claims 1, 10 to 15, characterized in that the determining, according to the correspondence between the spatial domain transmission filter and the candidate resources, the transmission resource corresponding to the first spatial domain transmission filter comprises:

determining the first spatial domain transmission filter;

Among the candidate resources corresponding to the first spatial domain transmission filter, a transmission resource corresponding to the first spatial domain transmission filter is selected.
The method according to any one of claims 1, 10 to 15, characterized in that the determining, according to the correspondence between the spatial domain transmission filter and the candidate resources, the transmission resource corresponding to the first spatial domain transmission filter comprises:

Selecting a candidate resource from the candidate resources corresponding to each of the spatial domain transmission filters, and obtaining a corresponding relationship between the spatial domain transmission filter and the selected candidate resource;

After determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resources, a transmission resource corresponding to the first spatial transmission filter is determined.
A sideline communication method, characterized in that the method is executed by a terminal device, and the method comprises:

Determining a first time unit according to the selected resource of the terminal device or the side control information received by the terminal device;

A spatial domain transmission filter is used for reception during the first time unit.
The method according to claim 18 is characterized in that the first time unit is the Mth time unit before the selected resource, and the time unit within the first time period before the selected resource, and M is a positive integer.
The method according to claim 19 is characterized in that the first time unit is the Mth time unit belonging to the resource pool before the selected resource, and the time unit belonging to the resource pool within the first time period before the selected resource.
The method according to claim 18 is characterized in that the first time unit is a time unit within a first time period from the second time unit to the selected resource; wherein the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a set of candidate resources.
The method according to claim 21 is characterized in that the first time unit is a time unit belonging to the resource pool within the first time period from the second time unit to the selected resource; wherein the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a set of candidate resources.
The method according to any one of claims 18 to 22 is characterized in that the spatial domain transmission filter used for receiving in the first time unit covers the spatial domain transmission filter used for sending on the selected resources.
The method according to any one of claims 18 to 22 is characterized in that the spatial domain transmission filter used for receiving in the first time unit is a spatial domain transmission filter used for receiving corresponding to the spatial domain transmission filter used for sending by the terminal device.
The method according to any one of claims 18 to 24 is characterized in that the selected resources do not include initial transmission resources selected by the terminal device.
The method according to claim 18, characterized in that determining the first time unit according to the selected resource of the terminal device or the side control information received by the terminal device comprises:

When it is determined according to the second sidelink control information scheduled by the first sidelink control information that the receiving end of the data scheduled by the first sidelink control information includes the terminal device, the time unit where the retransmission resource indicated by the first sidelink control information is located is determined as the first time unit.
The method according to claim 26 is characterized in that the spatial domain transmission filter used for reception within the first time unit is indicated by the first sideline control information or the second sideline control information scheduled by the first sideline control information.
A resource selection device, characterized in that the device comprises:

The determination module is used to determine the transmission resources corresponding to the first spatial domain transmission filter according to the corresponding relationship between the spatial domain transmission filter and the candidate resource set or the candidate resources.
The device according to claim 28 is characterized in that the correspondence between the spatial domain transmission filter and the candidate resource set includes: one spatial domain transmission filter corresponds to one candidate resource set.
The device according to claim 28 or 29 is characterized in that different candidate resource sets include different candidate resources.
The device according to any one of claims 28 to 30, characterized in that the device further comprises an exclusion module, which is used to:

Initialize at least one candidate resource set according to the candidate resources in the resource selection window, each candidate resource set including at least one candidate resource;

According to the listening result and/or the non-listening time unit in the resource listening window, the at least one candidate resource set is excluded.
The device according to claim 31, characterized in that

The exclusion module is also used to raise the first signal quality threshold, reinitialize the candidate resource set, and re-exclude resources from any candidate resource set when the number of candidate resources remaining in the candidate resource set after resource exclusion is less than a first threshold value.
The device according to claim 32 is characterized in that the first threshold value is E*M total , M total is the initial number of candidate resources in the candidate resource set, and E is greater than 0 and less than 1.
The device according to claim 33 is characterized in that E is configured by the network, or pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.
The device according to any one of claims 28 to 34, characterized in that the determination module is used to:

determining the first spatial domain transmission filter;

From the candidate resource set corresponding to the first spatial domain transmission filter, select the transmission resource corresponding to the first spatial domain transmission filter.
The device according to any one of claims 28 to 34, characterized in that the determination module is used to:

Selecting a candidate resource from each of the candidate resource sets to obtain a corresponding relationship between the spatial domain transmission filter and the selected candidate resource;

After determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resources, a transmission resource corresponding to the first spatial transmission filter is determined.
The device according to claim 28 is characterized in that the correspondence between the spatial domain transmission filter and the candidate resources includes: one spatial domain transmission filter corresponds to at least one candidate resource.
The device according to claim 28 or 37 is characterized in that different spatial transmission filters correspond to different candidate resources.
The device according to any one of claims 28, 37 to 38, characterized in that the device further comprises an exclusion module for:

Initializing a candidate resource set according to the candidate resources in the resource selection window, wherein the candidate resource set includes at least one candidate resource;

The candidate resource set is excluded according to the listening result and/or the non-listening time unit within the resource listening window.
The device according to claim 39, characterized in that

The exclusion module is also used to raise the second signal quality threshold, reinitialize the candidate resource set, or reinitialize the candidate resources corresponding to the spatial transmission filter, and re-exclude the candidate resource set for any spatial transmission filter when the number of remaining candidate resources corresponding to the spatial transmission filter after resource exclusion is less than a second threshold value.
The device according to claim 40 is characterized in that the second threshold value is F*M total , M total is the initial number of candidate resources corresponding to the spatial domain transmission filter, and F is greater than 0 and less than 1.
The device according to claim 41 is characterized in that F is configured by the network, or pre-configured, or is a preset value specified by the standard, or depends on the implementation of the terminal device.
The device according to any one of claims 28, 37 to 42, characterized in that the determining module is used to:

determining the first spatial domain transmission filter;

Among the candidate resources corresponding to the first spatial domain transmission filter, a transmission resource corresponding to the first spatial domain transmission filter is selected.
The device according to any one of claims 28, 37 to 42, characterized in that the determining module is used to:

Selecting a candidate resource from the candidate resources corresponding to each of the spatial domain transmission filters, and obtaining a corresponding relationship between the spatial domain transmission filter and the selected candidate resource;

After determining the first spatial transmission filter, based on the correspondence between the spatial transmission filter and the selected candidate resources, a transmission resource corresponding to the first spatial transmission filter is determined.
A side communication device, characterized in that the device comprises:

A determination module, configured to determine a first time unit according to a selected resource of a terminal device or side control information received by the terminal device;

A receiving module is used to receive using a spatial domain transmission filter within the first time unit.
The device according to claim 45 is characterized in that the first time unit is the Mth time unit before the selected resource, and the time unit within the first time period before the selected resource, and M is a positive integer.
The device according to claim 46 is characterized in that the first time unit is the Mth time unit belonging to the resource pool before the selected resource, and the time unit belonging to the resource pool within the first time period before the selected resource.
The device according to claim 45 is characterized in that the first time unit is a time unit within a first time period from the second time unit to the selected resource; wherein the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a set of candidate resources.
The device according to claim 48 is characterized in that the first time unit is a time unit belonging to the resource pool within the first time period from the second time unit to the selected resource; wherein the second time unit is a time unit that triggers resource selection, or triggers resource reselection, or a high-level triggering physical layer to report a set of candidate resources.
The device according to any one of claims 45 to 49 is characterized in that the spatial domain transmission filter used for receiving in the first time unit covers the spatial domain transmission filter used for sending on the selected resources.
The apparatus according to any one of claims 45 to 49 is characterized in that the spatial domain transmission filter used for receiving in the first time unit is a spatial domain transmission filter used for receiving corresponding to the spatial domain transmission filter used for sending by the terminal device.
The apparatus according to any one of claims 45 to 51 is characterized in that the selected resources do not include initial transmission resources selected by the terminal device.
The device according to claim 45, characterized in that

The determination module is used to determine the time unit where the retransmission resource indicated by the first side control information is located as the first time unit when it is determined according to the second side control information scheduled by the first side control information that the receiving end of the data scheduled by the first side control information includes the terminal device.
The device according to claim 53 is characterized in that the spatial domain transmission filter used for reception within the first time unit is indicated by the first sideline control information or the second sideline control information scheduled by the first sideline control information.
A terminal device, characterized in that the terminal device includes a processor and a memory, the memory stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 27.
A computer-readable storage medium, characterized in that a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 27.
A chip, characterized in that the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 27.
A computer program product, characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 27.