WO2022027697A1

WO2022027697A1 - Resource selection method and device

Info

Publication number: WO2022027697A1
Application number: PCT/CN2020/108023
Authority: WO
Inventors: 董蕾; 苏宏家; 郭文婷; 卢磊
Original assignee: 华为技术有限公司
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-02-10

Abstract

A first terminal first detects first sidelink control information (SCI) in a first window, the first SCI comprising at least one second SCI, and the second SCI being used to indicate at least one resource; then, the first terminal determines a first resource set according to the first SCI, the first resource set comprising resources remaining in a second window after resource exclusion, and the second window being a window after the first window; and finally, the first terminal determines a transmission resource according to the first resource set. It can be determined that the first terminal can determine the first resource set according to the first SCI detected in the first window, so as to further determine the transmission resource according to the first resource set, reducing resource waste caused by over-reservation, and improving the utilization rate of a system resource.

Description

Resource selection method and device

technical field

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

Background technique

The 3rd Generation Partnership Project (3GPP) is committed to the formulation of communication protocol standards. Under the proposed Long Term Evolution (LTE) technology network, vehicles can communicate with anything (Vehicle-To-Everything). , V2X) vehicle networking technology, with the development of the fifth-generation mobile communication network 5G new air interface NR technology in the 3GPP standard organization, 5G NR-V2X will also be further developed. Among them, the existing communication protocol standards are aimed at the communication process. Mechanisms for selecting resources for data (including shared information, and/or control messages) transmission have been documented.

At present, in NR-V2X, there are two modes of resource allocation related to the sidelink, one is a resource allocation mode for the base station, and the other is a user self-selected resource mode. In the user-selected resource mode, the Physical Layer Sidelink Shared Channel (PSSCH) indicated by the Sidelink Control Information (SCI) should be paired within the resource listening window, and /or, listen to the physical layer sideline feedback channel PSFCH corresponding to the physical layer sidelink control channel (Physical Sidelink Control Channel, PSCCH), and determine whether to exclude the SCI in the resource selection window according to the listening result of the PSFCH. Reservation resources. However, according to the existing listening process, only the PSSCH indicated by the SCI in the listening window and/or the PSFCH corresponding to the PSCCH can be monitored. When the PSSCH indicated by the SCI and/or the PSFCH corresponding to the PSCCH is not in the existing listening window Within the listening window, information sharing and/or control message transmission cannot be performed using resources released by other terminals according to the listening result of the PSFCH.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a resource selection method and apparatus, so that a terminal can quickly and accurately select transmission resources, thereby improving the utilization rate of resources and avoiding resource waste caused by over-reservation.

In a first aspect, a resource selection method is provided, the method comprising:

The first terminal monitors the first side link control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

The first terminal determines a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion is performed, and the second window is after the first window. window;

The first terminal determines transmission resources according to the first resource set.

In this embodiment of the present application, the first terminal, first, listens to the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one a resource, and then determine a first resource set according to the first SCI, where the first resource set includes the remaining resources in the second window after the resource exclusion is performed, and the second window is after the first window. window, and finally, the transmission resource is determined according to the first resource set. It can be seen that the first terminal can listen to the first sidelink control information SCI according to the first window and determine the first resource set, so as to further determine the transmission resources according to the first resource set, so as to further determine the transmission resources according to the first resource set. The resource set determines transmission resources, reduces data waste caused by over-reservation, and improves the utilization of system resources.

In an optional example, the first resource set includes some or all of the following:

In the second window, resources not indicated by the first SCI;

In the second window, among the released resources indicated by the first SCI, the reference signal received power RSRP is greater than the first preset threshold;

In the second window, among the resources indicated by the first SCI, resources whose RSRP is less than or equal to the first preset threshold.

In an optional example, the first terminal determines the first resource set in the second window according to the first SCI, including:

The first terminal monitors first feedback information in the first window, the first feedback information includes at least one second feedback information, and the first feedback information is at least one resource indicated in the first SCI Correspondingly, and in the first window, the information transmitted on at least one PSFCH resource;

The first terminal determines the first resource set according to the first SCI and the first feedback information.

In an optional example, the first terminal determines the first resource set according to the first SCI and the first feedback information, including:

The first terminal determines a first time slot set according to the first SCI, where the first time slot set includes at least one resource corresponding to at least one resource indicated by the first SCI, and after the first window, at least a time slot of a PSFCH resource;

The first terminal monitors the information transmitted on the PSFCH resource in each time slot in the first time slot set, and obtains third feedback information, where the third feedback information includes at least one fourth feedback information;

The first terminal determines the first resource set according to the first SCI, the first feedback information and the third feedback information.

In an optional example, the first terminal determining the first resource set according to the first SCI, the first feedback information and the third feedback information includes:

When the first terminal triggers a resource selection request in a first time slot, the first resource set is determined according to the first SCI and the first feedback information, and the first time slot is after the first window the time slot before the second window;

The first terminal determines the first resource set according to the first SCI and the third feedback information in the second time slot, or the first terminal determines the first resource set in the second time slot according to the first SCI, The first feedback information and the third feedback information determine the first resource set, and the second time slot is after the last time slot in the first time slot set and after the first time slot time slot.

It can be seen that, in this resource selection method, the first terminal can determine the time slot where the PSFCH resource after the listening window is located based on the first SCI, which expands the scope of monitoring the PSFCH, and further clarifies the use of the released reserved resources by listening to the PSFCH. Time node, and finally trigger two resource exclusions according to this time node, and finally determine the resource selection result according to the results of the two resource exclusions, further improve the existing resource exclusion mechanism, improve the utilization of system resources, reduce Reduce the waste of data due to over-booking.

In an optional example, the first resource set according to the first SCI, the first feedback information and the third feedback information by the first terminal includes:

The first terminal determines to trigger a resource selection request in a first time slot, where the first time slot is a time slot after the first window and before the second window;

The first terminal determines the first resource set according to the first SCI, the first feedback information and the third feedback information in a second time slot, and the second time slot is the first time slot Slots after the last slot in the set of slots and after the first slot.

It can be seen that, in this resource selection method, the first terminal can determine the time slot where the PSFCH resource after the listening window is located based on the first SCI, which expands the scope of monitoring the PSFCH, and further clarifies the use of the released reserved resources by listening to the PSFCH. Time node, and by delaying the time of resource exclusion, only triggering resource exclusion once to monitor the PSFCH, and determine the final resource selection result according to the result of resource exclusion, which improves the utilization of system resources and reduces the Due to the waste of data caused by over-reservation, in addition, the resource exclusion process is only triggered once at the physical layer, which reduces the processing complexity of the system and improves the efficiency of resource exclusion processing.

In an optional example, the second time slot includes any one of the following:

a time slot after the last PSFCH resource in a preconfigured first range, where the first range is a range starting from the first time slot;

the time slot after the PSFCH resource corresponding to the last time slot included in the first window that belongs to the sidelink resource pool;

The time slot after the last PSFCH resource corresponding to at least one resource indicated by the first SCI detected in the first window.

The first terminal determines the first resource set according to the first SCI and the first feedback information in a third time slot, where the third time slot is a time slot after the first window and before the fourth time slot , the fourth time slot is a time slot of a first resource, and the first resource is a resource selected by the first terminal.

It can be seen that in this resource selection method, the terminal introduces PSFCH listening at the moment of re-evaluation, listens on the PSFCH within the scope of the listening window corresponding to the re-evaluation, and judges the received SCI in the listening window corresponding to the primary selection. Whether the reserved resources are released, it can be seen that the combination of the newly added PSFCH listening function and the existing technology improves the utilization rate of system resources and reduces the waste of data caused by excessive reservation. The selected transmission resources are evaluated, reducing the amount of data processing and saving time.

In an optional example, the first terminal performs the following operations to determine whether the resources in the second window indicated by the second SCI are released:

The first terminal determines the type of the fifth feedback information, the type includes a positive acknowledgement ACK and a negative acknowledgement NACK, and the fifth feedback information is any one PSFCH corresponding to at least one resource indicated by the second SCI Information heard on the resource;

If the fifth feedback information is ACK, the first terminal determines that the resources in the second window indicated by the second SCI have been released;

If the fifth feedback information is NACK, the first terminal determines that the resources in the second window indicated by the second SCI are not released.

In an optional example, the first terminal determines the first resource in the second window according to the first SCI, including:

The first terminal judges whether the destination identifier carried by the second SCI is the identifier of the first terminal;

If so, the first terminal, when determining that a third resource exists in the second resource, determines that the first resource set includes a fourth resource, and the second resource is the first resource indicated by the second SCI at least one resource in the window, the third resource is a resource that successfully decodes the transport block, and the fourth resource includes at least one resource indicated by the second SCI in the second window.

[Correction 17.08.2020 according to Rule 91]
It can be seen that in this resource selection method, the first terminal can consider the data sent to itself during the resource exclusion process, and judge whether the reserved retransmission resources are released according to the decoding result. The reserved retransmission resources may not be excluded when the It can be seen that in the process of resource exclusion, after the first terminal receives the data sent to itself by other terminals, it can judge whether the released retransmission resources are reused according to the result of data decoding, which improves the utilization of system resources rate, reducing the waste of data caused by over-booking.

In an optional example, the method further includes:

The first terminal determines that the transmission on the resource indicated by the second SCI is HARQ-based transmission and/or unicast transmission.

In an optional example, after the first terminal determines whether the destination identifier carried by the second SCI is the first terminal identifier, the method further includes:

If so, when determining that the third resource does not exist in the second resource, the first terminal determines that the fourth resource is not included in the first resource set.

The first terminal determines that the resource selected by the first terminal is not included in the first resource set.

It can be seen that in this example, on the basis of the resource selection mechanism in the user-selected resource mode of NR-V2X, when a high-level resource selection request is received and resource selection is performed, the previously selected resources can be excluded, reducing the number of The probability of resource collision improves the throughput rate of the system and further improves the overall design of the user-selected resource mode mechanism.

In an optional example, the second resource is a resource for one pair of transport blocks.

In a second aspect, a resource selection apparatus is provided, the apparatus comprising:

Applied to the first terminal, the resource selection device includes:

a listening unit, configured to listen to the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

a first determining unit, configured to determine a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion, and the second window is the first window the window after;

The second determining unit determines the transmission resource according to the first resource set.

In the second window, resources not indicated by the first SCI;

In an optional example, in the aspect of determining the first resource set in the second window according to the first SCI,

The listening unit is further configured to listen for first feedback information in the first window, where the first feedback information includes at least one second feedback information, and the first feedback information is indicated in the first SCI Information transmitted on at least one PSFCH resource corresponding to at least one resource of and in the first window;

The first determining unit is specifically configured to determine the first resource set according to the first SCI and the first feedback information.

In an optional example, in the aspect of determining the first resource set according to the first SCI and the first feedback information, the first determining unit is specifically configured to: determine the first resource set according to the first SCI A set of time slots, the first set of time slots includes at least one time slot of the PSFCH resource corresponding to at least one resource indicated by the first SCI and after the first window;

The listening unit is further configured to listen to the information transmitted on the PSFCH resource in each time slot in the first time slot set to obtain third feedback information, where the third feedback information includes at least one fourth feedback information;

The first determining unit is specifically configured to determine the first resource set according to the first SCI, the first feedback information and the third feedback information.

In an optional example, in the aspect of determining the first resource set according to the first SCI, the first feedback information and the third feedback information, the first determining unit is specifically configured to:

When the first time slot triggers a resource selection request, the first resource set is determined according to the first SCI and the first feedback information, and the first time slot is the second window after the first window the previous time slot;

The first resource set is determined according to the first SCI and the third feedback information in the second time slot, or according to the first SCI, the first feedback information and the third time slot in the second time slot The three feedback information determines the first resource set, and the second time slot is the time slot after the last time slot in the first time slot set and after the first time slot.

In an optional example, in the aspect of the first resource set according to the first SCI, the first feedback information and the third feedback information, the first determining unit is specifically configured to:

determining that a resource selection request is triggered in a first time slot, the first time slot being a time slot after the first window and before the second window;

The first resource set is determined according to the first SCI, the first feedback information and the third feedback information in a second time slot, where the second time slot is the last time slot in the first time slot set A slot after one slot and a slot after the first slot.

In an optional example, the second time slot includes any one of the following:

In an optional example, in the aspect of determining the first resource set according to the first SCI and the first feedback information, the first determining unit is specifically configured to:

The first resource set is determined according to the first SCI and the first feedback information in the third time slot, the third time slot is the time slot after the first window and before the fourth time slot, and the fourth time slot is the time slot before the fourth time slot after the first window. The time slot is a time slot of a first resource, and the first resource is a resource selected by the first terminal.

In an optional example, the first determining unit performs the following operations to determine whether the resources in the second window indicated by the second SCI are released:

Determine the type of the fifth feedback information, where the type includes a positive acknowledgement ACK and a negative acknowledgement NACK, and the fifth feedback information is detected on any resource corresponding to at least one resource indicated by the second SCI information;

If the fifth feedback information is ACK, determining that the resources in the second window indicated by the second SCI have been released;

If the fifth feedback information is NACK, it is determined that the resources in the second window indicated by the second SCI are not released.

In an optional example, in the aspect of determining the first resource in the second window according to the first SCI, the first determining unit is specifically configured to:

Determine whether the destination identifier carried by the second SCI is the first terminal identifier;

If so, when it is determined that a third resource exists in the second resource, it is determined that the first resource set includes a fourth resource, and the second resource is at least one of the first windows indicated by the second SCI resource, the third resource is a resource that successfully decodes the transport block, and the fourth resource includes at least one resource indicated by the second SCI in the second window.

In an optional example, the first determining unit is further configured to:

It is determined that the transmission on the resource indicated by the second SCI is a HARQ-based transmission, and/or a unicast transmission.

In an optional example, the first determining unit is further configured to:

After judging whether the destination identifier carried by the second SCI is the first terminal identifier, if so, when it is determined that the third resource does not exist in the second resource, it is determined that the first resource set does not include the third resource. Four resources.

In an optional example, in the aspect of determining the first resource set according to the first SCI and the first feedback information, the first determining unit is further configured to:

It is determined that the resource selected by the first terminal is not included in the first resource set.

In a third aspect, a resource selection device is provided, comprising: a processor and a memory, the processor and the memory being electrically coupled;

The processor invokes some or all of the computer program instructions stored in the memory to cause the resource selection apparatus to perform any of the methods described in the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, wherein computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer executes Any of the methods described in one aspect.

It can be understood that the resource selection apparatus described in the second aspect and the computer storage medium described in the third aspect provided above are all used to execute any of the methods provided in the first aspect. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects in the corresponding method, which will not be repeated here.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below.

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

FIG. 1B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

2 is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

3A is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

3B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

3C is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

4A is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

4B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

4C is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

5A is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

5B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

6A is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

6B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

7A is a schematic flowchart of a resource selection method provided by an embodiment of the present application;

FIG. 7B is a schematic diagram of a scenario of a resource selection method provided by an embodiment of the present application;

8 is a structural block diagram of a communication device according to an embodiment of the application;

FIG. 9 is a schematic block diagram of a resource selection apparatus provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

In order to facilitate the understanding of the solution, first, the functions of the network elements/modules involved in the present invention are described. Based on Uu (UTRAN-to-UE) air interface transmission, both parties of wireless communication include network equipment and user communication equipment; based on SL air interface transmission, wireless communication The sending and receiving ends of the communication are all user communication equipments.

The technical solutions of the embodiments of the present application can be applied to the user communication device 110 in the example communication system 100 shown in FIG. 1A , the example communication system 100 includes the user communication device 110 and the network device 120 , and the user communication device 110 and the network device 120 communication connection.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (Advanced Long Term Evolution, LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based Access to Unlicensed Spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based Access to Unlicensed Spectrum) system Unlicensed Spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

In general, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, communication systems will not only support traditional wireless communication systems, but also support devices such as device to device (D2D) communication, machine to machine (M2M) communication, machine type Communication (machine type communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc., so this embodiment can also be applied to the above communication system.

Specifically, the user communication equipment may be user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, intelligent terminal, wireless communication device, user agent or user device. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, relay devices, in-vehicle devices, wearable devices, next-generation communication systems such as terminals in NR networks or future evolution of public land mobile communication networks network, PLMN), etc., the embodiments of this application are not specifically limited, the user communication device may also be a vehicle communication module or other embedded communication modules, and the network element involved in the present invention is mainly VUE (Vehicle User Equipment).

Further, in this embodiment of the present application, the user communication device may be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it may also be deployed on water (such as ships, etc.); it may also be deployed in the air (such as airplanes) , balloons and satellites, etc.).

Further, the user communication device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, industrial Wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security Wireless terminal equipment in (transportation safety), wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), etc.

Specifically, the network device may be a traditional macro base station eNB (evolved node B) in a traditional UMTS/LTE (Universal Mobile Telecommunications System, Universal Mobile Telecommunications System/Long Term Evolution, Long Term Evolution) wireless communication system, and a HetNet (Heterogeneous Network, In the heterogeneous network) scenario, it can be a micro base station eNB, in the distributed base station scenario, it can be a baseband processing unit BBU (Base Band Unit, baseband unit) and a radio frequency unit RRU (Remote Radio Unit, radio remote unit), in CRAN (Cloud In the Radio Access Netowrk, cloud wireless access network) scenario, it can be the baseband pool BBU pool and the radio frequency unit RRU, and in the future wireless communication system, it can be the base station (gNB) in the NR communication system.

It should be noted that, in some network deployments, the gNB may include a centralized unit (centralized unit, CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, in this architecture, the high-level signaling (such as the RRC layer signaling) can also be considered to be sent by the DU. , or sent by DU+AAU. It can be understood that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.

Further, the network device may have mobile characteristics, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) ) satellite etc. Optionally, the network device may also be a base station set in a location such as land or water.

Further, the network device may provide services for a cell, and the terminal communicates with the network device through transmission resources (eg, spectrum resources) in the cell. The cell may be a cell corresponding to a network device (eg, a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (small cell). The small cell may include a metro cell (metro cell), a micro cell (micro cell), a pico cell (pico cell), a femto cell (femto cell), and the like. The cell has the characteristics of small coverage and low transmission power, and is suitable for providing high-speed data transmission services.

Next, the resource selection process of the NR-V2X in the prior art in the user-selected resource mode is described. In the user-selected resource mode, the listening UE listens to the PSFCH resource corresponding to the resource indicated by the SCI in the resource listening window, and determines whether it is within the resource selection window according to the listening result of the PSFCH resource. Resources reserved by other terminals indicated by the SCI. However, according to the existing listening mechanism, the listening UE can only listen to the information transmitted by the SCI and the PSFCH resource corresponding to the resource indicated by the SCI in the listening window. When the PSFCH resource corresponding to the resource indicated by the SCI is not in the listening window In this case, resources released by other UEs cannot be utilized according to the result of listening at the PSFCH resource.

Referring to FIG. 1B , when the listening UE (ie, the first terminal) receives a resource selection request from a higher layer at time slot n, the listening UE will trigger a resource exclusion process at the physical layer at the time slot n, and the listening UE will trigger a resource exclusion process at the physical layer at the time slot n. Listen to the listening results in the window and judge the listening window

Whether the resources in the resource selection window reserved by the SCIs in the listening window are released, if among the multiple resources indicated by the SCIs detected in a certain time slot, the corresponding When the feedback information of PSFCH resource transmission is ACK, in the process of resource exclusion, the resource in the resource selection window indicated by the SCI is not excluded, and the listening UE includes the result of resource exclusion in the set _SA and reports it to the upper layer, The upper layer makes the final resource selection according to the result of resource exclusion.

As shown in FIG. 1B , the listening UE receives a resource selection request from the upper layer in time slot n, and triggers the physical layer to perform resource exclusion. If the three resources indicated by the SCI received in time slot m1 are R1, R3 and R5. The three resources indicated by the SCI detected in time slot m2 are R2, R4 and R6.

The PSFCH resource corresponding to R1 is located in z1, located in the listening window

If ACK is detected in the PSFCH, it means that R3 and R5 are released.

When the listening UE performs resource exclusion, if a certain candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R3 and R5, and the measurement result of the RSRP of the reference signal received power corresponding to R1 When the threshold is higher than the preset threshold, the listening UE will not exclude R3 and R5 according to the result of PSFCH listening, that is, the candidate resources that overlap with R3 and R5 will still be regarded as the identified candidate resources. _The listening UE will report its inclusion in the set SA to higher layers.

[Correction 17.08.2020 according to Rule 91]
The PSFCH resource corresponding to R2 is located in z2, which is located in the listening window

After that, if an ACK is detected on the PSFCH resource on the time slot z2, it means that R4 and R6 are released, but due to the existing listening mechanism, the listening UE cannot listen to the PSFCH resource of this time slot. In the process of resource exclusion, when the RSRP measurement result corresponding to R2 is higher than the preset threshold, the R4 and R6 indicated by the SCI detected in the time slot m2 will be excluded, so that the selectable R4 and R6 will not be selected. , resulting in a waste of resources.

In view of the above problems, the present invention proposes to perform PSFCH resource listening outside the existing listening window, in order to further improve the utilization rate of the resources released by other UEs.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a resource selection method provided by an embodiment of the present application. As shown in FIG. 2, the method includes the following steps:

101. The first terminal monitors the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource.

The first terminal may be the user communication device 110 in the communication system 100 as shown in FIG. 1A .

The first window is the listening window, the first SCI refers to all SCIs heard in the first window, and the second SCI refers to a single SCI heard in the first window.

The single resource indicated by the second SCI includes PSSCH and/or PSCCH, and the single resource indicated by the second SCI may transmit physical layer sidelink sharing information (referred to as shared information) through PSSCH, and/or, transmit through PSCCH Physical layer side link control information (referred to as control information).

The at least one resource indicated by the second SCI may be a resource for transmitting the second SCI and at least one resource reserved by other terminals, and the at least one resource indicated by the second SCI may also be a resource for transmitting the second SCI. Among them, at least one resource reserved by other terminals may all be resources in the first window; at least one resource reserved by other terminals may also be all resources in the second window; at least one resource reserved by other terminals may also be partially is the resource in the first window, and part is the resource in the second window; the time slot of at least one resource reserved by other terminals is not specifically limited. In addition, at least one resource reserved by other terminals may be one resource, at least one resource reserved by other terminals may also be two resources, and at least one resource reserved by other terminals may also be other resources. The number of resources reserved by other terminals is not specifically limited.

102. The first terminal determines a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion is performed, and the second window is the first window window after.

The second window is a resource selection window. The resources in the first resource set are also the remaining candidate resources in the second window after the resource exclusion is performed.

103. The first terminal determines a transmission resource according to the first resource set.

The first terminal selects transmission resources from the first resource set to share information and/or control information transmission.

It should be noted that the resources involved in this application may be retransmission resources for one transport block TB. In a possible example, the first resource set includes some or all of the following:

In the second window, resources not indicated by the first SCI;

That is, the first resource set includes some or all of the following: in the second window, resources that are not reserved by other terminals; in the second window, resources that are reserved and released by other terminals in the second window, reference signal The resources whose received power RSRP is greater than the first preset threshold; in the second window, among the resources reserved by other terminals, the resources whose RSRP is less than or equal to the first preset threshold.

In a possible example, the first terminal determines the first resource set in the second window according to the first SCI, including:

The first terminal listens to the first feedback information in the first window, the first feedback information includes at least one second feedback information, and the first feedback information is corresponding to the resource indicated in the first SCI , and in the first window, the information transmitted on at least one PSFCH resource;

The first feedback information refers to the information transmitted on all the PSFCH resources in the first window corresponding to all the resources indicated by the first SCI, and the second feedback information refers to the information corresponding to the resources indicated by the first SCI. Information transmitted on a single PSFCH resource in the first window.

In a possible example, the first terminal determines the first resource set according to the first SCI and the first feedback information, including:

The first terminal monitors the information transmitted on the PSFCH resource in each timeslot in the first timeslot set to obtain data, and the third feedback information includes at least one fourth feedback information;

The first set of time slots refers to the time slots of all PSFCH resources corresponding to the resources indicated by the first SCI after the first window; the third feedback information refers to the resources indicated by the first SCI after the first window Information transmitted on all corresponding PSFCH resources; the fourth feedback information refers to information transmitted by any one of the PSFCH resources corresponding to the resources indicated by the first SCI after the first window.

In a possible example, the first terminal determining the first resource set according to the first SCI, the first feedback information and the third feedback information includes:

It should be noted that, in this example, the terminal will perform resource exclusion processing twice, the first time is when a resource selection request is triggered, and the second time is after the last time slot in the first time slot set and the first time slot set. After a time slot.

In this example, the time slot where the PSFCH resource after the listening window is located is determined based on the first SCI, the scope of monitoring the PSFCH is expanded, and the time node for utilizing the released reserved resources by listening to the PSFCH is clarified. Finally, according to the time The node triggers two resource exclusions. Finally, the resource selection result is determined according to the results of the two resource exclusions, which further improves the existing resource exclusion mechanism, improves the utilization of system resources, and reduces the problem caused by over-reservation. Data waste.

In a possible example, the first resource set by the first terminal according to the first SCI, the first feedback information and the third feedback information includes:

It should be noted that, in this example, the terminal will perform a resource exclusion process once, and the resource exclusion process is performed after the last time slot in the first time slot set and after the first time slot.

In this example, the time slot where the PSFCH resource after the listening window is located is determined based on the first SCI, the scope of monitoring the PSFCH is expanded, and the time node for utilizing the released reserved resources by listening to the PSFCH is clarified, and by delaying the resource At the time of exclusion, only one resource exclusion is triggered to monitor the implementation of PSFCH, and the final resource selection result is determined according to the result of resource exclusion, which improves the utilization of system resources and reduces data waste caused by over-reservation. , In addition, the resource exclusion process is only triggered once at the physical layer, which reduces the processing complexity of the system and improves the efficiency of resource exclusion processing.

In a possible example, the second time slot includes any one of the following: a time slot after the last PSFCH resource in a preconfigured first range, where the first range is based on the first time slot as the range of the starting time slot;

Wherein, the interval between the first time slot and the second time slot is configured by the high layer, which can be specifically configured by radio resource control (Radio Resource Control, RRC) dedicated signaling, system information block (System Information Block, SIB) message or pre-configured etc., that is, the first range can be obtained through high-level configuration.

It can be seen that, in this example, the terminal can determine the specific range of monitoring the PSFCH by defining an interval or by using the sidelink resources included in the listening window.

Wherein, after selecting the transmission resource, the first terminal may re-evaluate each selected transmission resource before sharing information and/or transmitting the control message through the selected transmission resource.

In this example, PSFCH listening is introduced at the moment of re-evluation or pre-emption check, and the listening window corresponding to re-evluation or pre-emption check The PSFCH within the range is monitored, and it is judged whether the resources reserved by the received SCI in the listening window corresponding to the primary selection are released. The utilization rate of system resources reduces the waste of data caused by over-reservation, and at the same time, the selected transmission resources are evaluated in a targeted manner, which reduces the amount of data processing and saves time.

In a possible example, the first terminal performs the following operations to determine whether the resources in the second window indicated by the second SCI are released:

The first terminal determines the type of the fifth feedback information, the type includes a positive acknowledgement ACK and a negative acknowledgement NACK, and the fifth feedback information is any one corresponding to the at least one resource indicated by the second SCI Information detected on PSFCH resources;

The fifth feedback information may be the second feedback information, and the fifth feedback information may also be the fourth feedback information, that is, the fifth feedback information refers to the first time slot of the first window and the last time slot in the first time slot set. Between a time slot, the feedback information transmitted on any PSFCH resource corresponding to the resource indicated by the first SCI.

It can be seen that, in this example, when the first terminal detects an ACK on any PSFCH resource corresponding to at least one resource indicated by the second SCI, it does not perform any resource selection process on the resources in the second window indicated by the second SCI during resource selection. exclude.

In a possible example, the first terminal determines the first resource in the second window according to the first SCI, including:

The first terminal judging whether the destination identifier carried by the second SCI is the first terminal identifier is the first terminal judging whether the first terminal is the receiving terminal of the data transmitted by the resource indicated by the second SCI.

[Correction 17.08.2020 according to Rule 91]
It can be seen that in this example, the first terminal can consider the data sent to itself during the resource exclusion process, and judge whether the reserved retransmission resources are released according to the result of decoding the transport block. If the decoding of the transport block is successful, Then, the reserved retransmission resources may not be excluded when the resources are excluded. It can be seen that in the process of resource exclusion, after receiving the data sent by other terminals to the first terminal, it can judge whether the released retransmission resources are reused according to the result of decoding the transport block, which improves the system resource utilization. The utilization rate is reduced, and the data waste caused by over-booking is reduced.

In a possible example, the method further includes:

The process of judging whether the transmission on the resource indicated by the second SCI is based on HARQ is: judging whether the HARQ in the resource pool where the resource pool is located is enabled; if the HARQ in the resource pool where the resource pool is located is enabled, then determine whether the Whether the HARQ feedback enabled/disabled indicator field indicates HARQ based transmission; if the HARQ feedback enabled/disabled indicator field in the second SCI indicates HARQ based transmission, it is determined that the transmission on the resource indicated by the second SCI is HARQ based transmission If the HARQ feedback enabled/disabled indicator field in the second SCI does not indicate HARQ based transmission, then determine that the transmission on the resource indicated by the second SCI is not the transmission based on HARQ; If the HARQ of the resource pool is not enabled , it is determined that the transmission on the resource indicated by the second SCI is not HARQ-based transmission.

In a possible example, after the first terminal determines whether the destination identifier carried by the second SCI is the identifier of the first terminal, the method further includes:

[Correction 17.08.2020 according to Rule 91]
It can be seen that in this example, the first terminal can consider the data sent to itself during the resource exclusion process, and judge whether the reserved retransmission resources are released according to the result of decoding the transport block. If the decoding of the transport block fails, Then, the reserved retransmission resources are excluded when the resources are excluded. It can be seen that in the process of resource exclusion, after receiving the data sent by other terminals to itself, the first terminal can judge whether the released retransmission resources are reused according to the result of decoding the transport block, which improves the efficiency of resource exclusion. accuracy.

In a possible example, the determining, by the first terminal, the first resource set according to the first SCI and the first feedback information includes: determining, by the first terminal, that the first resource set does not include The resource that has been selected by the first terminal.

That is, in this example, in the process of resource exclusion, the first terminal will exclude the resources selected by the first terminal, so as not to select the resources that it has selected when selecting transmission resources. If the resource selected by the first terminal coincides with any one of the currently selected group of periodic resources, the first resource set does not include the resources located in the second window in the currently selected group of periodic resources. It can be seen that in this example, on the basis of the resource selection mechanism in the user-selected resource mode of NR-V2X, when a high-level resource selection request is received and resource selection is performed, the previously selected resources can be excluded, reducing the number of The probability of resource collision improves the throughput rate of the system and further improves the overall design of the user-selected resource mode mechanism.

[Correction 17.08.2020 according to Rule 91]
Please refer to FIG. 3A . FIG. 3A is a schematic flowchart of another resource selection method provided by an embodiment of the present application. As shown in FIG. 3A , the method includes the following steps:

201. The first terminal monitors the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

202. The first terminal monitors first feedback information in the first window, where the first feedback information includes at least one second feedback information, and the first feedback information corresponds to the resource indicated by the first SCI. the information transmitted on the physical layer sideline feedback channel PSFCH resource in the first window, the first feedback information includes at least one second feedback information;

203. The first terminal determines a first time slot set according to the first SCI, where the first time slot set includes at least one resource corresponding to at least one resource indicated by the first SCI and after the first window. , the time slot of at least one PSFCH resource;

204. The first terminal monitors the information transmitted on the PSFCH resource in each timeslot in the first timeslot set, and obtains third feedback information, where the third feedback information includes at least one fourth feedback information;

205. When the first terminal triggers a resource selection request in a first time slot, it determines a first resource set according to the first SCI and the first feedback information, and the first time slot is after the first window the time slot before the second window, the first resource set includes the remaining resources in the second window after resource exclusion, and the second window is the window after the first window;

206. The first terminal determines the first resource set according to the first SCI and the third feedback information in a second time slot, where the second time slot is the last time slot in the first time slot set time slots after one time slot and after said first time slot;

207. The first terminal determines the first resource set according to the first SCI, the first feedback information, and the third feedback information in the second time slot;

208. The first terminal determines transmission resources according to the first resource set.

The first resource set includes some or all of the following: in the second window, resources not indicated by the first SCI; in the second window, resources indicated by the first SCI and released Among the resources, the RSRP of the reference signal received power is greater than the first preset threshold; in the second window, among the resources indicated by the first SCI, the RSRP is less than or equal to the first preset threshold.

Wherein, the first terminal performs the following operations to determine whether the resources in the second window indicated by the second SCI are released: the first terminal determines the type of the fifth feedback information, and the type includes a positive ACK and a negative NACK is allowed, and the fifth feedback information is information detected on any PSFCH resource corresponding to at least one resource indicated by the second SCI; if the fifth feedback information is ACK, the first terminal determines that The resources in the second window indicated by the second SCI have been released; if the fifth feedback information is NACK, the first terminal determines the resources in the second window indicated by the second SCI Not released.

Wherein, the second time slot includes any one of the following: a time slot after the last PSFCH resource in a pre-configured first range, and the first range is a time slot starting from the first time slot Scope; the time slot after the PSFCH resource corresponding to the last time slot belonging to the sidelink resource pool included in the first window; at least one resource indicated by the first SCI detected in the first window Correspondingly, the time slot after the last PSFCH resource.

In this example, after the listening window is determined based on the first SCI, the time slot in which the PSFCH resources are located expands the scope of monitoring the PSFCH resources, and further clarifies the time node for using the released reserved resources by listening to the PSFCH resources. At this time node, two resource exclusion processes are triggered, and finally, the resource selection result is determined according to the results of the two resource exclusion processes, which further improves the existing resource exclusion mechanism, improves the utilization rate of system resources, and reduces the Data waste caused by overbooking.

Please refer to Figure 3B and Figure 3C, the listening UE is in the listening window

Listening to the first SCI and the first feedback information, the listening UE determines the listening window based on the first SCI listening

outside the first set of time slots that need to be listened to, and listen to the listening window in each time slot in the first set of time slots

Other than the PSFCH resource corresponding to the resource indicated by the first SCI, the second feedback information is obtained.

When the listening UE (that is, the aforementioned first terminal) receives a resource selection request from the upper layer in time slot n, the listening UE will trigger two resource exclusion processing at the physical layer, the first time in time slot n, and the second time After the last PSFCH resource included in the n+Y ₁ range (ie, the aforementioned first range), or, in the listening window

In the time slot after the PSFCH resource corresponding to the last time slot included in the sidelink resource pool, the resource exclusion process is performed twice, and the listening UE determines the listening window.

Whether the resource reserved by the received SCI in the SCI is released, if among the multiple resources indicated by the SCI detected in a certain time slot, the feedback information of a certain PSFCH resource corresponding to a certain resource in the listening window is transmitted When it is ACK, in the process of resource exclusion processing, the resources in the resource selection window indicated by the SCI are not excluded, and the listening UE can include the results of the two resource exclusions in the set S _A and the set S _A' respectively. Report to the upper layer, in addition, the listening UE may also include the results of two resource exclusions in the same set _SA and report to the higher layer, and the higher layer performs final resource selection according to the results of the two resource exclusion processes.

In an application scenario, taking the monitoring of PSFCH resources in the range of n+Y ₁ as an example, as shown in Figure 3B, when the listening UE receives a resource selection request from a higher layer in time slot n, it triggers the physical layer to perform resource exclusion processing , if the three resources indicated by the SCI detected in the time slot m1 are R1, R3 and R5. The three resources indicated by the SCI received at time slot m2 are R2, R4 and R6.

The PSFCH resource corresponding to R1 is located in the time slot z1, and the time slot z1 is located in the listening window

If the detected feedback information of the PSFCH resource transmission corresponding to R1 is ACK, it means that R3 and R5 are released.

When the listening UE performs the resource exclusion process, if a certain candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R3 and R5, and the measurement result of the RSRP corresponding to R1 is higher than the predetermined value. Set the threshold, the listening UE will not exclude R3 and R5, that is, the candidate resources that overlap with R3 and R5 will still be regarded as the verified candidate resources, and the listening UE will include them in the corresponding set and report to the higher layer .

The PSFCH resource corresponding to R2 is located in z2, and the listening UE will listen to the PSFCH located in z2 within the range of n+Y _1. If the feedback information transmitted by the PSFCH resource corresponding to R2 is ACK, it means that R4 and R6 are freed.

When the listening UE performs the resource exclusion process, if a certain candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R4 and R6, and the measurement result of the RSRP corresponding to R2 is higher than the predetermined value. The set threshold, the listening UE does not exclude R4 and R6, that is, the candidate resources that overlap with R4 and R6 will still be regarded as the verified candidate resources, and the listening UE will include them in the corresponding set and report to the higher layer.

Finally, the upper layer selects transmission resources according to the results of two resource exclusion processes.

In addition, when the resource exclusion process is triggered at the physical layer for the second time, the

When the time slot after the PSFCH resource corresponding to the last time slot included in the sidelink resource pool is triggered, as shown in Figure 3C, the listening window

The last PSFCH resource corresponding to all the time slots included in the sidelink resource pool is located in time slot z2, and the listening UE will trigger the second resource exclusion process after time slot z2, such as at n1.

[Correction 17.08.2020 according to Rule 91]
Please refer to FIG. 4A. FIG. 4A is a schematic flowchart of another resource selection method provided by an embodiment of the present application. As shown in FIG. 4A, the method includes the following steps:

301. The first terminal monitors the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

302. The first terminal monitors first feedback information in the first window, where the first feedback information includes at least one second feedback information, and the first feedback information corresponds to the resource indicated by the first SCI. the information of the PSFCH resource transmission of the physical layer sideline feedback channel in the first window;

303. The first terminal determines a first set of time slots according to the first SCI, where the first set of time slots includes resources corresponding to at least one resource indicated by the first SCI and after the first window. , the time slot of at least one PSFCH resource;

304. The first terminal monitors the information transmitted on the PSFCH resource in each timeslot in the first timeslot set, and obtains third feedback information, where the third feedback information includes at least one fourth feedback information;

305. The first terminal determines to trigger a resource selection request in a first time slot, where the first time slot is a time slot after the first window and before the second window;

306. The first terminal determines the first resource set according to the first SCI, the first feedback information, and the third feedback information in the second time slot, and the second time slot is the first resource set. a time slot after the last time slot in a set of time slots and after the first time slot;

307. The first terminal determines transmission resources according to the first resource set.

Wherein, the first terminal performs the following operations to determine whether the resources in the second window indicated by the second SCI are released: the first terminal determines the type of the fifth feedback information, and the type includes a positive ACK and a negative NACK is allowed, and the fifth feedback information is information detected on any PSFCH resource corresponding to at least one resource indicated by the second SCI; if the fifth feedback information is ACK, the first terminal Determine that the resources in the second window indicated by the second SCI have been released; if the fifth feedback information is NACK, the first terminal determines that the resources indicated by the second SCI are in the second window The resources in are not released.

The second time slot includes at least one of the following: a time slot after the last PSFCH resource in a preconfigured first range, and the first range is a time slot starting from the first time slot. Scope; the time slot after the PSFCH resource corresponding to the last time slot belonging to the sidelink resource pool included in the first window; at least one resource indicated by the first SCI detected in the first window Correspondingly, the time slot after the last PSFCH resource.

In this example, after the listening window is determined based on the first SCI, the time slot where the PSFCH resource is located expands the scope of monitoring the PSFCH resource, and further clarifies the time node for utilizing the released reserved resources by listening to the PSFCH resource, and through Delay the time when the resource exclusion process is triggered, only trigger the resource exclusion process once, and determine the final resource selection result according to the result of the resource exclusion process, which improves the utilization of system resources and reduces the problem caused by over-reservation. In addition, the resource exclusion process is only triggered once at the physical layer, which reduces the processing complexity of the system and improves the efficiency of resource exclusion processing.

Please refer to Figure 4B and Figure 4C, the listening UE is in the listening window

When the listening UE (that is, the aforementioned first terminal) determines that it receives a resource selection request from the upper layer in time slot n, the listening UE will be the last one included in the range of n+Y ₁ (that is, the aforementioned first range) at the physical layer. After a PSFCH resource, or, in the listening window

The time slot after the PSFCH resource corresponding to the last time slot included in the sidelink resource pool is triggered, and the resource exclusion process is triggered, and the listening UE determines the listening window.

Whether the resource reserved by the received SCI in the SCI is released, if among the multiple resources indicated by the SCI detected in a certain time slot, the feedback information of a certain PSFCH resource corresponding to a certain resource in the listening window is transmitted When it is ACK, in the process of resource exclusion processing, the resources in the resource selection window indicated by the SCI are not excluded, and the listening UE can include the result of this resource exclusion in the set S _A and the set S _A' respectively. Report to the upper layer, in addition, the listening UE may also include the result of this resource exclusion in the same set _SA and report it to the higher layer, and the higher layer performs final resource selection according to the result of this resource exclusion process.

In an application scenario, taking the monitoring of PSFCH resources in the range of n+Y ₁ as an example, as shown in FIG. 4B , taking the monitoring of PSFCH resources in the range of n+Y ₁ as an example, the listening UE receives the data in time slot n. The resource selection request to the upper layer will be delayed until n+Y ₁ to trigger the resource selection. If the three resources indicated by the SCI detected in the time slot m1 are R1, R3 and R5, and the three resources detected in the time slot m2 The three resources indicated by the SCI are R2, R4 and R6.

The PSFCH resource corresponding to R1 is located in time slot z1. If an ACK is detected at this PSFCH resource in time slot z1, it means that R3 and R5 are released, and the PSFCH resource corresponding to R2 is located in time slot z2. If ACK is detected on the resource, it means that R4 and R6 are released.

When the listening UE performs resource exclusion, if a candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R3 and R5, and the measurement result of the RSRP corresponding to R1 is higher than the preset value , the listening UE will not exclude R3 and R5, that is, the candidate resources that overlap with R3 and R5 will still be regarded as verified candidate resources, and the listening UE will include R3 and R5 in the set S _A and report to the The upper layer, the upper layer will make the final transmission resource selection according to the reported result; similarly, if a candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R4 and R6, and the corresponding R2 If the measurement result of RSRP is higher than the preset threshold, the listening UE will not exclude R4 and R6, that is, the candidate resources that overlap with R4 and R6 will still be regarded as verified candidate resources, and the listening UE will combine R4 and R6 with R4 and R6. R6 includes reporting to the upper layer in the set _SA , and the higher layer will perform final transmission resource selection according to the reported result.

Please refer to FIG. 5A . FIG. 5A is a schematic flowchart of another resource selection method provided by an embodiment of the present application. As shown in FIG. 5A , the method includes the following steps:

401. The first terminal monitors the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

402. The first terminal determines the first resource set according to the first SCI and the first feedback information in a third time slot, where the third time slot is the time slot after the first window and before the fourth time slot. time slot, the fourth time slot is the time slot of the first resource, and the first resource is the resource selected by the first terminal;

403. The first terminal determines transmission resources according to the first resource set.

The resource selection method is applicable to the scenario where the first terminal has selected resources, and can be integrated into the resource exclusion mechanism in the existing user-selected resource mode of NR-V2X.

In this example, PSFCH listening is introduced at the moment of re-evaluation, and the PSFCH within the listening window corresponding to the re-evaluation is listened to, and it is judged whether the resources reserved by the received SCI in the listening window corresponding to the primary selection are used. Release, it can be seen that the newly added PSFCH listening function is combined with the existing technology, which improves the utilization rate of system resources and reduces the waste of data caused by over-reservation. At the same time, the selected transmission resources are targeted. Evaluations are performed, data processing is reduced, and time is saved.

In an application scenario, see Figure 5B, the listening UE is in the listening window

[Correction 17.08.2020 according to Rule 91]
When the listening UE (that is, the aforementioned first terminal) receives a resource selection request from the upper layer in time slot n, the listening UE will trigger two resource exclusion processing at the physical layer, the first time in time slot n, and the second time After the last PSFCH resource included in the n+Y ₁ range (ie, the aforementioned first range), or, in the listening window

As shown in FIG. 5B , the listening UE receives a resource selection request from a higher layer in time slot n, and triggers a resource exclusion process. If the three resources indicated by the SCI detected in the time slot m1 are R1, R4 and R5, the three resources indicated by the SCI received in the time slot m2 are R2, R6 and R8, and the PSFCH resource corresponding to R1 is located in the time slot m2. z1, in the listening window

within the range. And the feedback information detected by the listening UE in the PSFCH resource of the time slot z1 is ACK, which means that R4 and R5 are released.

When the listening UE performs resource exclusion, if a candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R4 and R5, and the measurement result of the RSRP corresponding to R1 is higher than the preset , the listening UE will not exclude R4 and R5, that is, the candidate resources that overlap with R4 and R5 will still be regarded as verified candidate resources.

The PSFCH resource corresponding to the yellow R2 is located in the time slot z2 and is not in the listening window

Within the range and after time slot n, the listening UE cannot obtain the listening result of the PSFCH located in time slot z2 in time slot n. Therefore, it is impossible to judge whether R6 and R8 are released, and R6 and R8 will be excluded.

After the listening UE completes the elimination process, it reports the remaining candidate resource set SA to the upper layer. _The candidate resource set _SA does not include R6 and R8. It is assumed that the candidate resource set _SA includes R4, R5 and R6. The final transmission resource selection is completed from the set _SA . If the upper layer of the listening UE selects three blue R4, R5 and R6 from the candidate resource set _SA , the listening UE will Re-evaluate the resource, if the selected R4 of the listening UE is located in the time slot m, the listening UE will trigger the resource selection again in the time slot n-T3, and complete the resource listening and exclusion process.

Specifically, the listening UE needs to monitor the listening window

The SCI within the SCI listens, and according to the result of the listening, the candidate resources included in the resource selection window [mT ₃ +T ₁ , mT ₃ +T ₂ ] are excluded, and the listening window

Listen to the PSFCH resources within the range and determine the listening window

Whether the resource reserved by the received SCI in the SCI is released, if among the multiple resources indicated by the SCI detected in a certain time slot, the feedback information of a certain PSFCH resource corresponding to a certain resource in the listening window is transmitted When it is ACK, the resource in the resource selection window indicated by the SCI is not excluded during the resource exclusion process.

Because the PSFCH resource corresponding to R2 is located in time slot z2 and is in the listening window

and the feedback information detected by the listening UE in the PSFCH of the time slot z2 is ACK, it means that R6 and R8 are released.

When the listening UE performs resource exclusion in the resource selection window [mT ₃ +T ₁ , mT ₃ +T ₂ ], if a candidate resource in the resource selection window [mT ₃ +T ₁ , mT ₃ +T ₂ ] matches the When R6 and R8 overlap, and the measurement result of the RSRP corresponding to R2 is higher than the preset threshold, the listening UE will not exclude R6 and R8, that is, the candidate resources that overlap with R6 and R8 will still be regarded as verified. Candidate resources, the listening UE will include it in the set _SA and report to higher layers. The upper layer will make the final transmission resource selection according to the reported result.

Please refer to FIG. 6A . FIG. 6A is a schematic flowchart of another resource selection method provided by an embodiment of the present application. As shown in FIG. 6A , the method includes the following steps:

501. The first terminal monitors the first side link control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one physical layer side link shared channel resource;

502. The first terminal determines whether the destination identifier carried by the second SCI is the first terminal identifier;

503. If yes, when determining that a third resource exists in the second resource, the first terminal determines that the first resource set includes a fourth resource, and the second resource is the second resource indicated by the second SCI. at least one resource in the first window, the third resource is a resource that successfully decodes the transport block, and the fourth resource includes at least one resource indicated by the second SCI in the second window;

504. If yes, when determining that the third resource does not exist in the second resource, the first terminal determines that the first resource set does not include the fourth resource.

[Correction 17.08.2020 according to Rule 91]
In this example, the first terminal can consider the data sent to itself during the resource exclusion process, and judge whether the reserved retransmission resources are released according to the result of decoding the transport block. When the resource is excluded, the reserved retransmission resource may not be excluded. It can be seen that in the process of resource exclusion, after receiving the data sent by other terminals to the first terminal, it can judge whether the released retransmission resources are reused according to the result of decoding the transport block, which improves the system resource utilization. The utilization rate is reduced, and the data waste caused by over-booking is reduced.

[Correction 17.08.2020 according to Rule 91]
In addition, in this example, the first terminal can consider the data sent to itself during the resource exclusion process, and judge whether the reserved retransmission resources are released according to the result of decoding the transport block. If the decoding of the transport block fails, Then, the reserved retransmission resources are excluded when the resources are excluded. It can be seen that in the process of resource exclusion, after receiving the data sent by other terminals to itself, the first terminal can judge whether the released retransmission resources are reused according to the result of decoding the transport block, which improves the efficiency of resource exclusion. accuracy.

Referring to Figure 6B, when the listening UE selects resources,

In the SCI received in the SCI, if the destination ID (destination ID) carried by the SCI is the listening UE itself, the listening UE decodes the transmission block according to the resources indicated by the SCI, and judges whether the resources reserved by the SCI are released. . When the transport block is successfully decoded on the resource indicated by the SCI, it is not excluded in the resource exclusion process.

As shown in Figure 6B, in an application scenario, the listening UE receives a resource selection request from a higher layer in time slot n, and triggers resource selection processing. If the resources indicated by the SCI received in the time slot m are R1, R2 and R3, and the destination ID (destination ID) indicated in the SCI is the identity of the listening UE, for the data transmitted on the resource R1 located in the time slot m Perform decoding. If the decoding is successful, it means that the UE sending the SCI will not continue to send data on resources R2 and R3, and the listening UE does not need to receive on R2 and R3, and R2 and R3 will be released by the corresponding sending UE. .

When the listening UE performs resource exclusion, if a candidate resource in the resource selection window [n+T ₁ , n+T ₂ ] coincides with R2 and R3, and the measurement result of the RSRP corresponding to R1 is higher than the preset The listening UE does not exclude R2 and R3, that is, the candidate resources that overlap with R2 and R3 will still be regarded as the identified candidate resources, and the listening UE will include them in the set S _A and report To the upper layer, the higher layer will make the final transmission resource selection according to the reported result.

Please refer to FIG. 7A . FIG. 7A is a schematic flowchart of another resource selection method provided by an embodiment of the present application. As shown in FIG. 7A , the method includes the following steps:

601. The first terminal monitors the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

602. The first terminal monitors first feedback information in the first window, where the first feedback information includes at least one second feedback information, and the first feedback information corresponds to the resource indicated by the first SCI. the information transmitted on the PSFCH resource in the first window;

603. When the first terminal determines the first resource set according to the first SCI and the first feedback information, it is determined that the first resource set does not include the resources selected by the first terminal, and the first resource set does not include the resources selected by the first terminal. A resource set includes resources remaining in a second window after resource exclusion, where the second window is a window after the first window.

It can be seen that in this example, the resource selection process in the user-selected resource mode of NR-V2X considers that when a resource selection request from a higher layer is received, the resource selection can be excluded from the resource selection, which reduces the resource collision. It improves the throughput rate of the system and further improves the overall design of the user-selected resource mode mechanism.

When the listening UE receives a resource selection request from a higher layer, it needs to exclude the resources previously selected by the listening UE itself when performing resource selection.

As shown in Figure 7B, in an application scenario, if the listening UE receives a resource selection request from a higher layer in time slot n, the listening UE will trigger resource exclusion processing at the physical layer, and the listening UE needs to check the listening window.

The SCI within the SCI listens, and excludes the candidate resources included in the resource selection window [n+T ₁ , n+T ₂ ] according to the listening result. During the process of resource exclusion, if the listening UE is in the The transmission resources selected by time slot n are R1, R3 and R5.

If the listening UE receives a high-level resource selection request again in time slot n+1, the listening UE will trigger the resource exclusion process again at the physical layer, and the listening UE needs to check the listening window.

All SCIs within the SCI listen, and the candidate resources included in the resource selection window [n+1+T ₁ , n+1+T ₂ ] are excluded according to the result of the listening, because the listening UE is already in time slot n R1, R3 and R5 are selected, so when selecting resources at time slot n+1, in addition to the prior art excluding according to the SCI reservation, it is also necessary to exclude the selected R1, R3 and R5 from the candidate resource set, and detect Listening to the UE will report the final excluded set _SA to the upper layer, and the higher layer will select the final transmission resource according to the reported result, such as the finally selected resources R2, R4 and R6.

FIG. 8 is a structural block diagram of a resource selection apparatus 800 according to an embodiment of the present application. It should be understood that the communication device 800 can perform each step performed by the first terminal in any of the methods in FIG. 2 , FIG. 3A , FIG. 4A , FIG. 5A , FIG. 6A , and FIG. 7A , in order to avoid repetition, details are not described here. . The communication device 800 includes: a processor 111 and a memory 113, and the processor 111 and the memory 113 are electrically coupled;

The memory 113 is used to store computer program instructions. Optionally, the memory 113 (Memory#1) is located in the device, and the memory 113 (Memory#2) is integrated with the processor 111, or the memory 113 (Memory#2) is integrated with the processor 111. The memory 113 (Memory#3) is located outside the device;

The processor 111 is configured to execute part or all of the computer program instructions in the memory, and when the part or all of the computer program instructions are executed, the apparatus executes the method described in any of the foregoing embodiments.

Optionally, the method further includes: a transceiver 112 for communicating with other terminals; for example, acquiring first information, where the first information includes reference position information and/or satellite-related information of the first terminal.

It should be understood that the communication device 800 shown in FIG. 8 may be a chip or a circuit. For example, a chip or circuit may be provided in a terminal device or a communication device. The transceiver 112 described above may also be a communication interface. Transceivers include receivers and transmitters. Further, the communication apparatus 800 may also include a bus system.

Among them, the processor 111, the memory 113, and the transceiver 112 are connected through a bus system, and the processor 111 is used to execute the instructions stored in the memory 113 to control the transceiver to receive and send signals, and complete the first implementation method involved in this application. The steps of the terminal or the second terminal. The memory 113 may be integrated in the processor 111 , or may be provided separately from the processor 111 .

As an implementation manner, the function of the transceiver 112 can be considered to be implemented by a transceiver circuit or a dedicated transceiver chip. The processor 111 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip. The processor can be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP. The processor may further include hardware chips or other general purpose processors. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general-purpose array logic (generic array logic, GAL) and other programmable logic devices , discrete gate or transistor logic devices, discrete hardware components, etc., or any combination thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

An embodiment of the present application provides a computer storage medium storing a computer program, where the computer program includes a method for executing the foregoing method.

Embodiments of the present application provide a computer program product containing instructions, which, when executed on a computer, cause the computer to execute the method provided above.

FIG. 9 is a resource selection apparatus 900 provided by an embodiment of the present application, which may be used to execute the above-mentioned resource selection method and specific embodiment applied to the first terminal, and the apparatus may be a communication terminal or a chip in the communication terminal. As shown in FIG. 9 , the apparatus includes a listening unit 121 , a first determining unit 122 and a second determining unit 123 .

a listening unit 121, configured to listen to the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

A first determining unit 122, configured to determine a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion, and the second window is the first resource window after window;

The second determining unit 123 determines the transmission resource according to the first resource set.

Since the specific methods and embodiments have been introduced above, the apparatus 900 is only used to execute the resource selection method applied to the first terminal, so the specific description of the configuration method, especially the functions of each unit, can refer to the corresponding embodiments. The relevant parts will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the device embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and in actual implementation, there may be Additional divisions, eg multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the mutual communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each unit in the embodiment of the apparatus of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

It can be understood that the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

The methods in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer-readable storage medium may be any available media that can be accessed by a computer or a data storage terminal such as a server integrating one or more available media. The usable medium can be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it can also be an optical medium, such as a CD-ROM, DVD; it can also be a semiconductor medium, such as a solid state disk (SSD), random Access memory (random access memory, RAM), read-only memory (read-only memory, ROM) and registers, etc.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, terminals (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing terminal to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing terminal produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

Claims

A resource selection method, comprising:

The first terminal monitors the first side link control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

The first terminal determines a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion is performed, and the second window is after the first window. window;

The first terminal determines transmission resources according to the first resource set.
The method according to claim 1, wherein the first resource set includes part or all of the following:

In the second window, resources not indicated by the first SCI;

In the second window, among the released resources indicated by the first SCI, the reference signal received power RSRP is greater than the first preset threshold;

In the second window, among the resources indicated by the first SCI, resources whose RSRP is less than or equal to the first preset threshold.
The method according to claim 1 or 2, wherein the first terminal determines the first resource set in the second window according to the first SCI, comprising:

The first terminal monitors first feedback information in the first window, the first feedback information includes at least one second feedback information, and the first feedback information is at least one resource indicated in the first SCI Correspondingly, and in the first window, the information transmitted on at least one PSFCH resource;

The first terminal determines the first resource set according to the first SCI and the first feedback information.
The method according to claim 3, wherein the determining, by the first terminal, the first resource set according to the first SCI and the first feedback information, comprises:

The first terminal determines a first time slot set according to the first SCI, where the first time slot set includes at least one resource corresponding to at least one resource indicated by the first SCI, and after the first window, at least a time slot of a PSFCH resource;

The first terminal monitors the information transmitted on the PSFCH resource in each time slot in the first time slot set, and obtains third feedback information, where the third feedback information includes at least one fourth feedback information;

The first terminal determines the first resource set according to the first SCI, the first feedback information and the third feedback information.
The method according to claim 4, wherein the determining, by the first terminal, the first resource set according to the first SCI, the first feedback information and the third feedback information, comprises:

When the first terminal triggers a resource selection request in a first time slot, the first resource set is determined according to the first SCI and the first feedback information, and the first time slot is after the first window the time slot before the second window;

The first terminal determines the first resource set according to the first SCI and the third feedback information in the second time slot, or the first terminal determines the first resource set in the second time slot according to the first SCI, The first feedback information and the third feedback information determine the first resource set, and the second time slot is after the last time slot in the first time slot set and after the first time slot time slot.
The method according to claim 4, wherein the first resource set of the first terminal according to the first SCI, the first feedback information and the third feedback information comprises:

The first terminal determines to trigger a resource selection request in a first time slot, where the first time slot is a time slot after the first window and before the second window;

The first terminal determines the first resource set according to the first SCI, the first feedback information and the third feedback information in a second time slot, and the second time slot is the first time slot Slots after the last slot in the set of slots and after the first slot.
The method according to claim 5 or 6, wherein the second time slot comprises any one of the following:

a time slot after the last PSFCH resource in a preconfigured first range, where the first range is a range starting from the first time slot;

the time slot after the PSFCH resource corresponding to the last time slot included in the first window that belongs to the sidelink resource pool;

The time slot after the last PSFCH resource corresponding to at least one resource indicated by the first SCI detected in the first window.
The method according to claim 3, wherein the determining, by the first terminal, the first resource set according to the first SCI and the first feedback information, comprises:

The first terminal determines the first resource set according to the first SCI and the first feedback information in a third time slot, where the third time slot is a time slot after the first window and before the fourth time slot , the fourth time slot is a time slot of a first resource, and the first resource is a resource selected by the first terminal.
The method according to claim 3 or 4, wherein the first terminal performs the following operations to determine whether the resources in the second window indicated by the second SCI are released:

The first terminal determines the type of the fifth feedback information, the type includes a positive acknowledgement ACK and a negative acknowledgement NACK, and the fifth feedback information is any one PSFCH corresponding to at least one resource indicated by the second SCI Information heard on the resource;

If the fifth feedback information is ACK, the first terminal determines that the resources in the second window indicated by the second SCI have been released;

If the fifth feedback information is NACK, the first terminal determines that the resources in the second window indicated by the second SCI are not released.
The method according to claim 1 or 2, wherein the determining, by the first terminal, the first resource in the second window according to the first SCI, comprises:

The first terminal judges whether the destination identifier carried by the second SCI is the identifier of the first terminal;

If so, the first terminal, when determining that a third resource exists in the second resource, determines that the first resource set includes a fourth resource, and the second resource is the first resource indicated by the second SCI at least one resource in the window, the third resource is a resource that successfully decodes the transport block, and the fourth resource includes at least one resource indicated by the second SCI in the second window.
The method of claim 10, wherein the method further comprises:

The first terminal determines that the transmission on the resource indicated by the second SCI is HARQ-based transmission and/or unicast transmission.
The method according to claim 10, is characterized in that, after described first terminal judges whether the target identification carried by described second SCI is first terminal identification, described method also comprises:

If so, when determining that the third resource does not exist in the second resource, the first terminal determines that the fourth resource is not included in the first resource set.
The method according to claim 1 or 2, wherein the determining, by the first terminal, the first resource set according to the first SCI and the first feedback information, comprises:

The first terminal determines that the resource selected by the first terminal is not included in the first resource set.
The method according to claim 1, wherein the second resource is a resource for a pair of transport blocks.
A resource selection apparatus, characterized in that, applied to a first terminal, the resource selection apparatus includes:

a listening unit, configured to listen to the first sidelink control information SCI in the first window, where the first SCI includes at least one second SCI, and the second SCI is used to indicate at least one resource;

a first determining unit, configured to determine a first resource set according to the first SCI, where the first resource set includes the remaining resources in a second window after resource exclusion, and the second window is the first window the window after;

The second determining unit determines the transmission resource according to the first resource set.
The apparatus according to claim 15, wherein the first resource set includes part or all of the following:

In the second window, resources not indicated by the first SCI;

In the second window, among the released resources indicated by the first SCI, the reference signal received power RSRP is greater than the first preset threshold;

In the second window, among the resources indicated by the first SCI, resources whose RSRP is less than or equal to the first preset threshold.
The apparatus according to claim 15 or 16, wherein, in the aspect of determining the first resource set in the second window according to the first SCI,

The listening unit is further configured to listen for first feedback information in the first window, where the first feedback information includes at least one second feedback information, and the first feedback information is indicated by the first SCI Information corresponding to at least one resource and transmitted on the PSFCH resource in the first window;

The first determining unit is specifically configured to determine the first resource set according to the first SCI and the first feedback information.
The apparatus according to claim 17, wherein, in the aspect of determining the first resource set according to the first SCI and the first feedback information,

The first determining unit is specifically configured to determine, according to the first SCI, a first set of time slots, where the first set of time slots includes at least one resource corresponding to at least one resource indicated by the first SCI, and is After the window, at least one time slot of the PSFCH resource;

The listening unit is further configured to listen to the information transmitted on the PSFCH resource in each time slot in the first time slot set to obtain third feedback information, where the third feedback information includes at least one fourth feedback information;

The first determining unit is specifically configured to determine the first resource set according to the first SCI, the first feedback information and the third feedback information.
The apparatus according to claim 18, wherein, in the aspect of determining the first resource set according to the first SCI, the first feedback information and the third feedback information, the first determining The unit is specifically used for:

When the first time slot triggers a resource selection request, the first resource set is determined according to the first SCI and the first feedback information, and the first time slot is the second window after the first window the previous time slot;

The first resource set is determined according to the first SCI and the third feedback information in the second time slot, or the first resource set is determined in the second time slot according to the first SCI and the third feedback information A set of resources, the second time slot is a time slot after the last time slot in the first time slot set and after the first time slot.
The apparatus according to claim 18, wherein, in the aspect of the first resource set according to the first SCI, the first feedback information and the third feedback information, the first determining unit Specifically for:

determining that a resource selection request is triggered in a first time slot, the first time slot being a time slot after the first window and before the second window;

The first resource set is determined according to the first SCI, the first feedback information and the third feedback information in a second time slot, where the second time slot is the last time slot in the first time slot set A slot after one slot and a slot after the first slot.
The apparatus according to claim 19 or 20, wherein the second time slot includes any one of the following:

a time slot after the last PSFCH resource in a preconfigured first range, where the first range is a range starting from the first time slot;

the time slot after the PSFCH resource corresponding to the last time slot included in the first window that belongs to the sidelink resource pool;

The time slot after the last PSFCH resource corresponding to at least one resource indicated by the first SCI detected in the first window.
The apparatus according to claim 17, wherein, in the aspect of determining the first resource set according to the first SCI and the first feedback information, the first determining unit is specifically configured to:

The first resource set is determined according to the first SCI and the first feedback information in the third time slot, the third time slot is the time slot after the first window and before the fourth time slot, and the fourth time slot is the time slot before the fourth time slot after the first window. The time slot is a time slot of a first resource, and the first resource is a resource selected by the first terminal.
The apparatus according to claim 17 or 18, wherein the first determining unit performs the following operations to determine whether the resources in the second window indicated by the second SCI are released:

Determine the type of the fifth feedback information, where the type includes a positive acknowledgement ACK and a negative acknowledgement NACK, and the fifth feedback information is detected on any PSFCH resource corresponding to at least one resource indicated by the second SCI Information;

If the fifth feedback information is ACK, determining that the resources in the second window indicated by the second SCI have been released;

If the fifth feedback information is NACK, it is determined that the resources in the second window indicated by the second SCI are not released.
The apparatus according to claim 15 or 16, wherein, in the aspect of determining the first resource in the second window according to the first SCI, the first determining unit is specifically configured to:

Determine whether the destination identifier carried by the second SCI is the first terminal identifier;

If so, when it is determined that a third resource exists in the second resource, it is determined that the first resource set includes a fourth resource, and the second resource is at least one of the first windows indicated by the second SCI resource, the third resource is a resource that successfully decodes the transport block, and the fourth resource includes at least one resource indicated by the second SCI in the second window.
The device according to claim 24, wherein the first determining unit is further configured to:

It is determined that the transmission indicated for the second SCI is a HARQ based transmission, and/or a unicast transmission.
The device according to claim 24, wherein the first determining unit is further configured to:

After judging whether the destination identifier carried by the second SCI is the first terminal identifier, if so, when it is determined that the third resource does not exist in the second resource, it is determined that the first resource set does not include the third resource. Four resources.
The apparatus according to claim 15 or 16, wherein, in terms of determining the first resource set according to the first SCI and the first feedback information, the first determining unit is further configured to:

It is determined that the resource selected by the first terminal is not included in the first resource set.
The method of claim 15, wherein the second resource is a resource for a pair of transport blocks.
A resource selection device, characterized in that:

Including: a processor and a memory, the processor and the memory are electrically coupled;

The processor invokes some or all of the computer program instructions stored in the memory to cause the resource selection apparatus to perform any of the methods of claims 1-14.
A computer-readable storage medium, characterized in that, computer-readable instructions are stored in the computer-storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any one of claims 1-14. a method.