Method for executing a2x communication and user equipment

Abstract

Provided is a method for a user equipment to execute aircraft-to-everything (A2X) communication. The method comprises: receiving an A2X resource pool configuration, the A2X resource pool configuration comprising at least one sidelink (SL) resource pool; and, for an A2X communication service to be executed, on the basis of whether each SL resource pool has an A2X service information identifier and of the A2X service information identifier in the case of having the A2X service information identifier, selecting from among the at least one SL resource pool an SL resource pool for the A2X communication service, the A2X communication service comprising either of a BRID service and a DAA service.

Description

Method for performing A2X communication and user equipment Technical Field

[0001] The present invention relates to the technical field of wireless communications, and more particularly, to a method for performing A2X communication executed by a user equipment and a corresponding user equipment. Background Art

[0002] In recent years, drone applications have attracted increasing attention, such as multi-drone joint operations, personal entertainment applications, and cargo delivery. These drone applications can be realized or enhanced in terms of service performance based on wireless technology.

[0003] LTE version 15 has been enhanced for drones to meet their data transmission and mobility needs.

[0004] NR supports drone functionality in Release 18. This includes support for A2X communication, which includes, but is not limited to, the transmission and reception of Broadcast Remote Identifiers (BRIDs) and Detect and Avoid (DAA) signaling between drone devices. This remote identification allows for better control of drone flight trajectory, flight safety, and compliance with legal and regulatory constraints. DAA signaling exchanges enable drones to effectively detect obstacles and perform avoidance maneuvers.

[0005] The present invention discusses how a drone device transmits BRID and DAA signaling when the drone device supports the A2X communication function. Summary of the Invention

[0006] In order to solve at least part of the above problems, the present invention provides a method for performing A2X communication by a user equipment and the user equipment.

[0007] According to one aspect of the present invention, a method for performing aircraft-to-everything A2X communication by a user equipment is provided, comprising: receiving an A2X resource pool configuration, the A2X resource pool configuration including at least one sidelink communication (SL) resource pool; and for an A2X communication service to be executed, selecting an SL resource pool for the A2X communication service from at least one of the SL resource pools based on whether each of the SL resource pools has an A2X service information identifier and the A2X service information identifier when having the A2X service information identifier, the A2X communication service including any one of a BRID service and a DAA service.

[0008] Optionally, the selection of the SL resource pool for the A2X communication service includes: when it is determined that the first condition indicating that there is an SL resource pool with the A2X service information identifier matching the A2X communication service among at least one of the SL resource pools is met, the SL resource pool with the A2X service information identifier matching the A2X communication service is selected as the SL resource pool for the A2X communication service.

[0009] Optionally, when it is determined that the SL data in the logical channel is available for the A2X communication service, a determination is performed as to whether the first condition is met.

[0010] Optionally, in the case where the A2X communication service is a BRID service, the selection of the SL resource pool for the A2X communication service includes: when it is determined that the first condition indicating that there is an SL resource pool with the A2X service information identifier matching the A2X communication service in at least one of the SL resource pools is not met, the selection is performed in any one of the following ways: selecting any SL resource pool from the SL resource pool configured with the UE; selecting the SL resource pool for the BRID service from the SL resource pool that does not have the A2X service information identifier in at least one of the SL resource pools; selecting the SL resource pool for the BRID service from the SL pool source pool other than the SL pool source pool with the A2X service information identifier matching the DAA service in at least one of the SL resource pools; selecting the SL resource pool for the BRID service from the SL resource pool other than the A2X resource pool in the resource pool configured with the UE.

[0011] Optionally, in the case where the A2X communication service is a DAA service, the selection of the SL resource pool for the A2X communication service includes: when it is determined that the first condition indicating that there is an SL resource pool with the A2X service information identifier matching the A2X communication service in at least one of the SL resource pools is not met, the selection is performed in any one of the following ways: selecting any SL resource pool from the SL resource pool configured with the UE; selecting the SL resource pool for the DAA service from the SL resource pool that does not have the A2X service information identifier in at least one of the SL resource pools; selecting the SL resource pool for the DAA service from the SL pool source pools other than the SL pool source pool with the A2X service information identifier matching the BRID service in at least one of the SL resource pools; selecting the SL resource pool for the DAA service from the SL resource pools other than the A2X resource pool in the resource pool configured with the UE.

[0012] Optionally, after selecting the SL resource pool for the A2X communication service, if there is new data transmission, the method also includes: when the new data transmission is an SL authorization associated with the selected SL resource pool, determining the target of the new data transmission based on the wireless resource information indicated by the SL authorization and the SL resource pool associated with the SL authorization.

[0013] Optionally, determining the target of the new data transmission includes at least one of the following: selecting any target related to A2X communication; if the selected SL resource pool has the A2X service information identifier, then based on the A2X service information identifier, selecting a target related to A2X communication corresponding to the A2X communication service type of the new data transmission; if the selected SL resource pool does not have the A2X service information identifier, then selecting a target associated with any one of unicast, multicast and broadcast.

[0014] Optionally, when it is determined that the second condition is met, the selection of the SL resource pool for the A2X communication service includes any one of the following: selecting a public SL resource pool as the SL resource pool for the A2X communication service; selecting an SL resource pool that does not have the A2X service information identifier as the SL resource pool for the A2X communication service, and the second condition indicates that there is an SL resource pool that does not have the A2X service information identifier, or the A2X service information identifier of the SL resource pool with the A2X service information identifier does not match the A2X communication service.

[0015] According to another aspect of the present invention, a user equipment is provided, comprising: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.

[0016] According to the present invention, the user equipment can enable the UE to correctly select the resource pool and target for transmitting BRID and DAA signaling, thereby effectively utilizing wireless resources and enabling the BRID and DAA services of A2X communication to proceed normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a flowchart illustrating a method for performing A2X communication according to an embodiment of the present invention.

[0018] FIG2 is a flowchart illustrating a method for performing A2X communication according to a specific embodiment of the present invention.

[0019] FIG3 is a flowchart illustrating a method for performing A2X communication according to another embodiment of the present invention.

[0020] FIG4 is a flowchart illustrating a method for performing A2X communication according to another embodiment of the present invention.

[0021] FIG5 is a simplified structural block diagram of a user equipment UE according to the present invention. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention is not limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion in understanding the present invention.

[0023] The following describes some of the terms involved in this invention. The specific meanings of the terms can be found in the latest 3GPP standards.

[0024] UE: User Equipment

[0025] NR: New Radio, a new generation of wireless technology

[0026] PHY: physical layer, physical layer

[0027] MAC: Medium Access Control, multimedia access control

[0028] RLC: Radio Link Control

[0029] SDAP: Service Data Adaptation Protocol

[0030] PDCP: Packet Data Convergence Protocol, Packet Data Convergence Protocol

[0031] RRC: Radio Resource Control

[0032] RRC_CONNECTED: RRC connected state

[0033] RRC_INACTIVE: RRC inactive state

[0034] RRC_IDLE: RRC idle state

[0035] RAN: Radio Access Network

[0036] NG-RAN: Next-generation radio access network

[0037] gNB: the next Generation Node B

[0038] Sidelink: Sidelink communication, sidelink

[0039] SL: Sidelink, side communication, side link

[0040] SCI: Sidelink Control Information, sidelink communication control information

[0041] AS: Access Stratum, access layer

[0042] IE: Information Element

[0043] CE: Control Element

[0044] MIB: Master Information Block

[0045] SIB: System Information Block

[0046] DCI: Downlink Control Information, downlink control information

[0047] RB: radio bearer

[0048] DRB: Data Radio Bearer

[0049] SRB: Signaling Radio Bearer

[0050] Uu: air interface

[0051] ProSe: Proximity based Services

[0052] A2X: Aircraft-to-Everything

[0053] NAS: Non-Access-Stratum

[0054] PC5-S: PC5 signalling, PC5 signaling

[0055] L2: Layer 2, layer 2 architecture

[0056] SpCell: Special Cell, including PCell and PSCell

[0057] PCell: Primary Cell

[0058] PSCell: Primary SCG Cell, SCG main cell

[0059] L2-ID: Layer-2 ID (identity), layer 2 identification

[0060] 3GPP: 3rd Generation Partnership Project

[0061] UAV: Uncrewed Aerial Vehicle

[0062] BRID: Broadcast Remote Identification, broadcast remote identification

[0063] DAA: Detect And Avoid

[0064] In the present invention, network (network or NW), base station (base station or gNB or eNB) and RAN are used interchangeably. The network may be a Long Term Evolution LTE network, a New Radio Access Technology (New RAT, NR) network, an enhanced Long Term Evolution eLTE network, or other networks defined in subsequent evolution versions of 3GPP. The base station in the present invention may be any type of base station, including Node B, enhanced base station eNB, 5G communication system base station gNB; or micro base station, pico base station, macro base station, home base station, etc.; the network generally refers to a base station or a cell. The cell may also be a cell under any of the above-mentioned types of base stations. Unless otherwise specified, the cell, beam, and transmission point (TRP) may be interchangeable, and the base station may also be a central unit (gNB-Central Unit, gNB-CU) or a distributed unit (gNB-Distributed Unit, gNB-DU) constituting the base station.

[0065] In the present invention, the user equipment (UE) may refer to the NR device supporting the UAV function described in the background technology, or the NR device supporting A2X communication, or the UAV device supporting A2X communication, or the NR device supporting the A2X dedicated resource pool, or other types of NR devices or LTE devices.

[0066] In the present invention, "UE", "UAV", "UAV UE", "Aerial", "Aerial UE", "flying UE", "UAV system" and other names representing devices (or systems) with drone functions can be used interchangeably.

[0067] In the present invention, "UAV identification", "(UAV) Remote identification", "(UAV) BRID" and other names representing drone identification can be used interchangeably.

[0068] In the present invention, SL, sidelink, and PC5 can be used interchangeably.

[0069] In the present invention, "DAA" and "DDAA (Direct Detect And Avoid)" and other names representing detection and avoidance based on the PC5 interface can be used interchangeably.

[0070] In the present invention, “A2X communication” and “A2X service” can be used interchangeably.

[0071] In the present invention, "change" and "update" can be used interchangeably.

[0072] In the present invention, "configure", "set", "present" and "include" can be used interchangeably.

[0073] In the present invention, "not configured" and "absent" can be used interchangeably.

[0074] In the present invention, “used,” “available,” “active,” “applied,” “performed,” and “enabled” may be used interchangeably.

[0075] In the present invention, “use,” “make available,” “apply,” “implement,” “enable,” “activate,” “perform,” “do,” etc. may be used interchangeably.

[0076] In the present invention, "feedback", "submit", "report", "send", "transmit or transport or transmission", "inform", "indicate" and "provide" can be used interchangeably.

[0077] In the present invention, "trigger" and "initiate" can be used interchangeably.

[0078] In the present invention, "associate", "correspond" and "map" can be used interchangeably.

[0079] In the present invention, the upper layer may refer to the A2X layer, or the V2X layer, or the NAS layer, or the PC5-S protocol layer, or a layer above the RRC layer. In the present invention, the A2X layer, the V2X layer, the NAS layer, and the PC5-S protocol layer may be used interchangeably.

[0080] In the present invention, unless otherwise specified, a resource pool may refer to one or more resource pools.

[0081] It should be noted that in this specification, two things connected by "and", "or", or "and / or" may represent different ways of expressing the same meaning in different application scenarios. There may be a relationship of inclusion and being included between the two, and they do not necessarily refer to completely different content.

[0082] Hereinafter, a description is given of related technologies of the present invention.

[0083] PC5 interface

[0084] The PC5 interface is used for control and user plane sidelink communication between UEs. For sidelink unicast, a PC5-RRC connection is a logical connection at the AS layer between a source Layer 2 ID and a target Layer 2 ID. The upper layer establishes a PC5 unicast link for sidelink unicast communication. Each established PC5 unicast link corresponds to a corresponding PC5-RRC connection.

[0085] PC5 interface transmission

[0086] The transmission modes of the PC5 interface are unicast, multicast, and broadcast. The transmission of the PC5 interface is generally sidelink transmission.

[0087] Unicast refers to communication transmission between two UEs. For unicast communication, the upper layer(s) establish a PC5 unicast link for unicast communication. Each PC5 unicast link establishment corresponds to a PC5-RRC connection. A PC5-RRC connection is an AS-layer logical connection between a source layer 2 ID and a target layer 2 ID. Different UEs may correspond to different source layer 2 IDs and target layer 2 IDs.

[0088] Multicast refers to communication transmission between a group of UEs. The multicast method can use a target layer 2 ID for a group of UEs, and all UEs in the group can receive multicast information of the service through the target layer 2 ID.

[0089] Broadcast mode refers to communication transmission between multiple UEs. The broadcast mode can use one target layer 2 ID for one service, and multiple UEs can receive the broadcast information of the service through the target layer 2 ID.

[0090] The UE may be in one of the following three scenarios when transmitting based on the PC5 interface:

[0091] 1) Within coverage: The UE is within the coverage area;

[0092] 2) Out of coverage: The UE is out of coverage;

[0093] 3) Partial coverage: Among a UE and another or other UEs communicating with it, at least one UE is within the coverage area, and at least one UE is out of the coverage area.

[0094] The coverage range mentioned here refers to whether the UE is within the coverage range of the base station or outside the coverage range.

[0095] UEs communicating over the PC5 interface require the use of PC5 radio resources. There are generally two resource allocation modes: one in which the network allocates resources, and the other in which the UE selects resources from a resource pool. The UE can obtain resource pool configurations through system messages sent by the network or RRC-specific signaling, or through pre-configuration. In NR, sidelink resource allocation mode 1 corresponds to network resource allocation, while sidelink resource allocation mode 2 corresponds to UE resource selection from a resource pool.

[0096] Sidelink communication transmission

[0097] In NR, if the frequency used for sidelink communication is included in RRC dedicated signaling (such as RRCReconfiguration message) (or if the UE is in RRC connected state) and the UE is configured to select resources by itself, the underlying layer is configured to execute resource allocation mode 2, that is, transmission resources are selected from the transmission resource pool configured by RRC dedicated signaling; if the frequency used for sidelink communication is in the system message (such as SIB12 message) (or if the UE is in RRC idle state or RRC inactive state), the underlying layer is configured to execute sidelink resource allocation mode 2, that is, transmission resources are selected from the transmission resource pool configured in the system message; if the frequency used for sidelink communication is neither included in RRC dedicated signaling nor in the system message (that is, the UE is out of coverage), the UE configures the underlying layer to execute sidelink resource allocation mode 2, that is, transmission resources are selected from the transmission resource pool configured by pre-configuration.

[0098] Sidelink communication reception

[0099] In NR, if the frequency used for sidelink communication is included in RRC dedicated signaling (such as RRCReconfiguration message with synchronization reconfiguration) (or if the UE is in RRC connected state), the bottom layer is configured to use the receiving resource pool configured in the RRC dedicated signaling to monitor the sidelink control information and corresponding data, that is, select the receiving resources in the receiving resource pool configured by the RRC dedicated signaling; if the frequency used for sidelink communication is in the system message (such as SIB12 message) (or if the UE is in RRC idle state or RRC inactive state), the bottom layer is configured to use the receiving resource pool configured in the system message to monitor the sidelink control information and corresponding data, that is, select the receiving resources in the receiving resource pool configured by the system message; if the frequency used for sidelink communication is neither included in the RRC dedicated signaling nor in the system message (that is, the UE is out of coverage), the bottom layer is configured to use the receiving resource pool configured in the pre-configuration to monitor the sidelink control information and corresponding data, that is, select the receiving resources in the receiving resource pool configured by the pre-configuration.

[0100] BRID

[0101] The UAV identifier can be a remote identifier Remote ID (ID: identification), which can be used to identify the UAV device. The Remote ID can be known to other UAV UEs, control terminals (equipment or personnel), and third-party devices through broadcasting and other means, thereby achieving tracking of the UAV UE, control of the UAV UE, and control of the UAV UE's flight trajectory, flight safety, and legal and regulatory constraints on flight. The Remote ID may contain various information such as the UAV UE's session identifier, serial number, location information of the ground base station, emergency status indication, compliance information, etc. The method of transmitting and receiving the Remote ID by broadcasting is called BRID (Broadcast Remote Identification), which is a service of A2X communication. The BRID service can be transmitted and received through the PC5 interface.

[0102] DAA

[0103] DAA signaling may include obstacle detection information, collision warning information, and trajectory correction information. By transmitting and receiving DAA signaling, UAV UEs can effectively obtain obstacle information and guidance on obstacle avoidance, thereby effectively avoiding obstacles and collisions with other UAV UEs. DAA is an A2X communication service and can be transmitted and received over the PC5 interface.

[0104] BRID and DAA based on PC5 interface

[0105] To support transmission of BRID services and / or DAA services on the PC5 interface, the UAV UE may transmit BRID and / or DAA through resource allocation mode 2, i.e., by selecting resources from a network-configured resource pool or a pre-configured resource pool.

[0106] First, the UE can obtain the A2X resource pool configuration by receiving network configuration or through pre-configuration. The A2X resource pool configuration can be included in the RRC-specific signaling sent by the network (for example, RRC reconfiguration RRCReconfiguration message), and / or included in the system message sent by the network (for example, system message 12, SIB12). The A2X resource pool configuration can be represented by the sl-BWP-PoolConfigA2X information element in the RRC-specific signaling, and / or the sl-BWP-PoolConfigCommonA2X information element in the system message (or pre-configuration). The A2X resource pool configuration can include a transmission resource pool configuration (for example, sl-TxPoolSelectedNormal), and the transmission resource pool configuration can include one or more SL resource pools for transmission. Each SL resource pool used for transmission can include A2X service information (for example, sl-A2X-Service) to identify whether the resource pool is used for BRID service, DAA service, or both BRID and DAA services.

[0107] Regarding the A2X resource pool configuration, the first possible interpretation is that the configured A2X resource pool is exclusive to A2X communication, meaning that all resource pools configured in the A2X resource pool configuration cannot be used for communications other than A2X communication. A second possible interpretation is that only when A2X service information exists in a certain SL resource pool is the resource pool exclusive to A2X communication; otherwise (i.e., if A2X service information does not exist in the SL resource pool), the resource pool is shared by all communications, meaning that the resource pool can be used for communications other than A2X communication. Regarding the second possible interpretation, all resource pools configured in the A2X resource pool configuration may fall into three situations: all resource pools are shared, some resource pools are shared while others are exclusive to A2X communication, or all resource pools are exclusive to A2X communication.

[0108] This invention discusses how to select resource pools and targets for transmitting BRIDs and DAA signaling to support A2X communication. This invention enables the UE to correctly select resource pools and targets for transmitting BRIDs and DAA signaling, effectively utilizing radio resources and ensuring the normal operation of BRID and DAA services in A2X communication.

[0109] First, the outline of the present invention will be described with reference to Fig. 1. Fig. 1 is a flowchart illustrating a method for performing A2X communication according to an embodiment of the present invention.

[0110] As shown in Figure 1, in step 101, an A2X resource pool configuration is received, wherein the A2X resource pool configuration includes at least one sidelink communication SL resource pool. Details of the A2X resource pool configuration are described in the following embodiments.

[0111] In step 103, for the A2X communication service to be executed, an SL resource pool for the A2X communication service is selected from at least one SL resource pool based on whether each SL resource pool has an A2X service information identifier and the A2X service information identifier if the SL resource pool has an A2X service information identifier. In this specification, the A2X communication service may include either a BRID service or a DAA service.

[0112] Step 103 includes selecting the SL resource pool for the A2X communication service based on the judgment result that the SL resource pool does not have the A2X service information identifier, and also includes selecting the SL resource pool for the A2X communication service based on the judgment result that the SL resource pool has the A2X service information identifier and the A2X service information identifier it has when the SL resource pool has the A2X service information identifier.

[0113] Hereinafter, several embodiments of the present invention for solving the above problems are described in detail.

[0114] Example 1

[0115] FIG2 is a flowchart illustrating a method for performing A2X communication according to a specific embodiment of the present invention.

[0116] Optionally, as shown in Figure 2, in step 201, the UE receives an A2X resource pool configuration. Optionally, the A2X resource pool configuration may be included in RRC-specific signaling sent by the network (e.g., an RRCReconfiguration message), or in a system message sent by the network (e.g., System Message 12, SIB12), or in a pre-configuration. For example, the A2X resource pool configuration included in the RRC-specific signaling is sl-BWP-PoolConfigA2X, and / or the A2X resource pool configuration included in a system message or pre-configuration is sl-BWP-PoolConfigCommonA2X.

[0117] Optionally, the A2X resource pool configuration includes a transmission resource pool configuration (e.g., sl-TxPoolSelectedNormal), which may include one or more SL resource pools for transmission (e.g., sl-ResourcePool). Optionally, each SL resource pool for transmission may include A2X service information (e.g., sl-A2X-Service) to identify whether the SL resource pool is used for BRID service (the value of the A2X service information is brid), or DAA service (the value of the A2X service information is daa), or both BRID and DAA services (the value of the A2X service information is bridandDAA).

[0118] Optionally, in step 203, the UE selects a resource pool for transmitting the BRID service of the A2X communication.

[0119] Optionally, the UE determines at least one of the following conditions (an example of the first condition):

[0120] - A2X service information in at least one (configured) resource pool exists;

[0121] - The A2X service information in at least one (configured) resource pool is indicated as brid or bridandDAA;

[0122] -A2X service information indication is brid or bridandDAA.

[0123] Optionally, the UE only determines the above judgment conditions when the SL data in the logical channel is available, and / or the SL data in the logical channel is available for A2X communication, and / or the SL data in the logical channel is available for the BRID service of A2X communication.

[0124] Optionally, when at least one of the above judgment conditions is met, the UE performs at least one of the following operations to select (SL data for transmitting A2X communication) and / or (SL data for transmitting BRID service of A2X communication):

[0125] - Select the resource pool, which is the (configured) resource pool that meets the above judgment conditions;

[0126] -Select the resource pool indicated by the A2X service information as brid or bridandDAA.

[0127] Optionally, otherwise (that is, if any one of the above judgment conditions is not met), the UE judges at least one of the following first resource pool judgment conditions:

[0128] - A2X service information does not exist in some (configured) resource pools, while A2X service information exists in other (configured) resource pools;

[0129] - A2X service information does not exist in one or some (configured) resource pools, while A2X service information exists in another or some (configured) resource pools;

[0130] - A2X service information does not exist in at least one (configured) resource pool;

[0131] - Not all (configured) resource pools do not contain A2X service information, nor does all (configured) resource pools contain A2X service information.

[0132] Optionally, when at least one of the first resource pool judgment conditions is met, the UE performs at least one of the following operations to select (SL data) for transmitting A2X communication and / or (SL data) for transmitting BRID service of A2X communication:

[0133] - Select any resource pool among the (configured) resource pools;

[0134] -Select any resource pool from the resource pools where no A2X service information exists;

[0135] - If the resource pool indicated by the A2X service information as daa is configured, select any resource pool from the (configured) resource pools other than the resource pool indicated by the A2X service information as daa;

[0136] - If an A2X resource pool is configured, select any resource pool among the (configured) resource pools other than the A2X resource pool.

[0137] Optionally, in this instance, the resource pool refers to an A2X resource pool, or a transmission resource pool, or an SL resource pool, or a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in an A2X resource pool configuration.

[0138] Optionally, in this embodiment, the judgment and operation performed by the UE may specifically be the judgment and operation performed by the MAC entity of the UE.

[0139] Example 2

[0140] According to embodiment 1, optionally, step 301 is the same as step 201 .

[0141] Optionally, in step 303, the UE selects a resource pool for transmitting the DAA service of the A2X communication.

[0142] Optionally, the UE determines at least one of the following conditions (an example of the first condition):

[0143] - A2X service information in at least one (configured) resource pool exists;

[0144] - The A2X service information in at least one (configured) resource pool is indicated as DAA or Brid and DAA;

[0145] -A2X service information indication is daa or bridandDAA.

[0146] Optionally, the UE only determines the above judgment conditions when the SL data in the logical channel is available, and / or the SL data in the logical channel is available for A2X communication, and / or the SL data in the logical channel is available for the DAA service of A2X communication.

[0147] Optionally, when at least one of the above judgment conditions is met, the UE performs at least one of the following operations to select (SL data for transmitting A2X communication) and / or (SL data for transmitting DAA service of A2X communication):

[0148] - Select the resource pool, which is the (configured) resource pool that meets the above judgment conditions;

[0149] -Select the resource pool indicated by the A2X service information as daa or bridandDAA.

[0150] Optionally, otherwise (i.e., any one of the above judgment conditions is not met), the UE judges at least one of the following first resource pool judgment conditions (the first resource pool judgment condition is the same as the first resource pool judgment condition in Example 1).

[0151] Optionally, when at least one of the first resource pool judgment conditions is met, the UE performs at least one of the following operations to select (SL data) for transmitting A2X communication and / or (SL data) for transmitting DAA services of A2X communication:

[0152] - Select any resource pool among the (configured) resource pools;

[0153] -Select any resource pool from the resource pools where no A2X service information exists;

[0154] - If the resource pool indicated by the A2X service information as brid is configured, select any resource pool from the (configured) resource pools other than the resource pool indicated by the A2X service information as brid;

[0155] - If an A2X resource pool is configured, select any resource pool among the (configured) resource pools other than the A2X resource pool.

[0156] Optionally, in this instance, the resource pool refers to an A2X resource pool, or a transmission resource pool, or an SL resource pool, or a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in an A2X resource pool configuration.

[0157] Optionally, in this embodiment, the judgment and operation performed by the UE may specifically be the judgment and operation performed by the MAC entity of the UE.

[0158] Example 3

[0159] To transmit data, the UE must simultaneously transmit the SCI information, which carries the control information required for data transmission. Data transmission can be divided into new transmission and retransmission. Certain data requires sidelink radio resources (i.e., sidelink grants) for transmission. When data transmission is determined, the target corresponding to the SCI (i.e., the target L2-ID carried in the SCI) is selected based on the radio resources associated with the data (e.g., a radio resource in the resource pool selected by the UE), and the logical channel (or channels) to be used for data transmission is selected.

[0160] According to embodiment 1, optionally, step 401 is the same as step 201 .

[0161] Optionally, in step 403, for each new transmission, the UE selects a target carried in the SCI (Sidelink Control Information). The SCI is control information between two UEs over the PC5 interface, used to control data and signaling transmission / reception of traffic channels. Optionally, (if a new transmission is associated with a sidelink grant in a (configured) resource pool), the UE performs at least one of the following operations:

[0162] -Select a destination associated with A2X communication, that is, arbitrarily select a destination associated with A2X communication;

[0163] -If A2X service information exists in the resource pool, select a destination associated with the A2X communication;

[0164] - Based on the service type of A2X communication corresponding to the SL data, select a target associated with A2X communication, or select a target associated with BRID or DAA;

[0165] -If there is no A2X service information in the resource pool, select a target associated with one of unicast, multicast, and broadcast;

[0166] -If there is no A2X service information in the resource pool, select a target associated with A2X communication based on the service type of A2X communication corresponding to the SL data, or select a target associated with BRID or DAA;

[0167] -If the A2X service information indicates bridAndDAA (i.e., the corresponding resource pool can be used for both BRID and DAA), based on the service type of A2X communication corresponding to the SL data, select a target associated with A2X communication, or select a target associated with BRID or DAA.

[0168] Optionally, a specific implementation method of "the service type of A2X communication corresponding to the SL data" can be: if the service type of A2X communication corresponding to the SL data is BRID, then select a target associated with BRID; if the service type of A2X communication corresponding to the SL data is DAA, then select a target associated with DAA.

[0169] Optionally, “SL data” refers to SL data used for A2X communication, and the SL data is available for transmission.

[0170] Optionally, the target may be represented by a target L2-ID.

[0171] Optionally, the sidelink authorization refers to radio resource information used to transmit SL data. After the opposite UE obtains the sidelink authorization information, it can determine how to transmit / receive SL data.

[0172] Optionally, in this instance, the resource pool refers to an A2X resource pool, or a transmission resource pool, or an SL resource pool, or a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in an A2X resource pool configuration.

[0173] In this embodiment, determining the target may refer to determining the target L2-ID to which the message is sent. For unicast transmission, this may be the unspecified L2-ID of a specific peer UE; for broadcast transmission, this may be different target L2-IDs corresponding to different service types specified in the protocol. This embodiment corresponds to the selection of a resource pool and resources. However, when data is actually transmitted, the target L2-ID must be determined again based on the selected resource pool service type. For example, if a dedicated resource pool is selected, the target L2-ID cannot be entered arbitrarily; it must be consistent with the resource pool service type. If a public resource pool is selected, a service type consistent with the data type can be selected.

[0174] Example 4

[0175] Optionally, the UE receives an A2X resource pool configuration. Optionally, the A2X resource pool configuration may be included in RRC-specific signaling sent by the network (e.g., an RRCReconfiguration message), or in a system message sent by the network (e.g., System Message 12, SIB12), or in a pre-configuration. For example, the A2X resource pool configuration included in the RRC-specific signaling is sl-BWP-PoolConfigA2X, and / or the A2X resource pool configuration included in the system message or pre-configuration is sl-BWP-PoolConfigCommonA2X.

[0176] Optionally, the A2X resource pool configuration includes a transmission resource pool configuration (e.g., sl-TxPoolSelectedNormal), which may include one or more SL resource pool configuration information for transmission. Optionally, each SL resource pool used for transmission may include A2X service information (e.g., sl-A2X-Service), which is used to identify whether the SL resource pool is used for BRID service (the value of the A2X service information is brid), or DAA service (the value of the A2X service information is daa), or both BRID and DAA services (the value of the A2X service information is bridandDAA).

[0177] Optionally, the UE determines at least one of the following conditions (an example of the second condition):

[0178] - A2X service information does not exist in some (configured) resource pools, while A2X service information exists in other (configured) resource pools;

[0179] - A2X service information does not exist in one or some (configured) resource pools, while A2X service information exists in another or some (configured) resource pools;

[0180] - A2X service information does not exist in at least one (configured) resource pool;

[0181] - Not all (configured) resource pools do not contain A2X service information, nor does all (configured) resource pools contain A2X service information;

[0182] - (Except the resource pool in which no A2X service information exists) A2X service information exists in other (configured) resource pools, and the A2X service information (the value) does not match the service type of the UE's A2X communication.

[0183] Optionally, when at least one of the above conditions is met, the UE performs at least one of the following first operations:

[0184] - (Can) select a shared (or non-dedicated) resource pool for A2X communication (transmission);

[0185] -(Can) select a resource pool that does not have A2X service information for A2X communication (transmission);

[0186] - Only (only) resource pools without A2X service information can be selected for A2X communication (transmission).

[0187] Optionally, in this instance, the resource pool may refer to an A2X resource pool, or a transmission resource pool, or an SL resource pool, or a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in a transmission resource pool in an A2X resource pool configuration, or an SL resource pool in an A2X resource pool configuration.

[0188] Optionally, in this embodiment, the judgment and operation performed by the UE may specifically be the judgment and operation performed by the MAC entity of the UE.

[0189] Example 5

[0190] According to another implementation of Example 4.

[0191] The differences from Example 4 are described below.

[0192] Optionally, the UE determines at least one of the following conditions:

[0193] -A2X resource pool configuration is configured;

[0194] - A2X service information exists in at least one (configured) resource pool;

[0195] -The A2X service information (its value) matches the service type of the UE's A2X communication.

[0196] Optionally, when at least one of the above conditions is met, the UE performs at least one of the following operations:

[0197] -Selecting a resource pool in the A2X resource pool configuration for A2X communication (transmission);

[0198] -Selecting a resource pool whose A2X service information (value) matches the service type of the UE's A2X communication for A2X communication (transmission);

[0199] - Only the resource pools in the A2X resource pool configuration can be selected for A2X communication (transmission);

[0200] -Only the resource pool whose A2X service information (value) matches the service type of the UE's A2X communication can be selected for A2X communication (transmission).

[0201] Optionally, otherwise (ie, any one of the above conditions is not met), the UE performs at least one of the following first operations, where the first operation is the same as the first operation in Example 4.

[0202] Example 6

[0203] Optionally, the UE receives an A2X resource pool configuration. Optionally, the A2X resource pool configuration may be included in RRC-specific signaling sent by the network (e.g., an RRCReconfiguration message), or in a system message sent by the network (e.g., System Message 12, SIB12), or in a pre-configuration. For example, the A2X resource pool configuration included in the RRC-specific signaling is sl-BWP-PoolConfigA2X, and / or the A2X resource pool configuration included in the system message or pre-configuration is sl-BWP-PoolConfigCommonA2X.

[0204] Optionally, the A2X resource pool configuration includes a transmission resource pool configuration (e.g., sl-TxPoolSelectedNormal), which may include one or more SL resource pools for transmission. Optionally, each SL resource pool for transmission may include A2X service information (e.g., sl-A2X-Service) to identify whether the SL resource pool is used for BRID service (the value of the A2X service information is brid), or DAA service (the value of the A2X service information is daa), or both BRID and DAA services (the value of the A2X service information is bridandDAA).

[0205] Optionally, if the (configured) transmission resource pool configuration is included in the A2X resource pool configuration, the A2X service information is mandatory (i.e., the A2X service information must be included in the SL resource pool); otherwise, the A2X service information does not exist (i.e., the A2X service information is not included in the SL resource pool).

[0206] Alternatively, optionally, if the (configured) SL resource pool is included in the transmission resource pool configuration in the A2X resource pool configuration, the A2X service information is mandatory (i.e., the A2X service information must be included in the SL resource pool); otherwise, the A2X service information does not exist (i.e., the A2X service information is not included in the SL resource pool).

[0207] Alternatively, optionally, if the (configured) SL resource pool is included in the A2X resource pool configuration, the A2X service information is mandatory (i.e., the A2X service information must be included in the SL resource pool); otherwise, the A2X service information does not exist (i.e., the A2X service information is not included in the SL resource pool).

[0208] Figure 5 is a simplified block diagram of the user equipment (UE) according to the present invention. As shown in Figure 5, the user equipment (UE) 500 includes a processor 501 and a memory 502. The processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 502 may include, for example, a volatile memory (such as a random access memory (RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory. The memory 502 stores program instructions. When executed by the processor 501, these instructions may execute the above-described method performed by the user equipment as described in detail in the present invention.

[0209] The program running on the device according to the present invention can be a program that controls the central processing unit (CPU) to enable the computer to implement the functions of the embodiments of the present invention. The program or the information processed by the program can be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems.

[0210] The program for realizing each embodiment of the present invention function can be recorded on a computer-readable recording medium. Can realize corresponding function by making a computer system read the program recorded on the recording medium and executing these programs. So-called "computer system" herein can be the computer system embedded in the device, can include operating system or hardware (such as peripheral device). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-term dynamic storage program recording medium or any other recording medium that is computer-readable.

[0211] The various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., single-chip or multi-chip integrated circuits). The circuits designed to perform the functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In the event that new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

[0212] Furthermore, the present invention is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0213] As described above, embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above-described embodiments, and the present invention also includes any design changes that do not deviate from the main purpose of the present invention. In addition, various modifications can be made to the present invention within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, components with the same effect described in the above embodiments can be replaced with each other.

Claims

1. A method for a user equipment to perform aircraft-to-everything A2X communication, comprising: Receiving an A2X resource pool configuration, where the A2X resource pool configuration includes at least one sidelink communication SL resource pool; And For an A2X communication service to be performed, based on whether each of the SL resource pools has an A2X service information identifier and the A2X service information identifier in the case of having the A2X service information identifier, select an SL resource pool for the A2X communication service from at least one of the SL resource pools, The A2X communication service includes any one of a BRID service and a DAA service.

2. The method according to claim 1, wherein, The selection of the SL resource pool for the A2X communication service includes: In the case of determining that a first condition indicating that there is an SL resource pool among at least one of the SL resource pools having an A2X service information identifier matching the A2X communication service is satisfied, select the SL resource pool having the A2X service information identifier matching the A2X communication service as the SL resource pool for the A2X communication service.

3. The method according to claim 2, further comprising: When it is determined that SL data in a logical channel is available for the A2X communication service, determine whether the first condition is satisfied.

4. The method according to any one of claims 1 to 3, wherein In the case where the A2X communication service is a BRID service, the selection of the SL resource pool for the A2X communication service includes: In the case of determining that the first condition indicating that there is an SL resource pool among at least one of the SL resource pools having an A2X service information identifier matching the A2X communication service is not satisfied, perform the selection by any one of the following methods: Select an arbitrary SL resource pool from the SL resource pools configured for the UE; Select an SL resource pool for the BRID service from the SL resource pools among at least one of the SL resource pools that do not have the A2X service information identifier; Select an SL resource pool for the BRID service from the SL resource pools among at least one of the SL resource pools other than the SL pool source having an A2X service information identifier matching the DAA service; Select an SL resource pool for the BRID service from the SL resource pools other than the A2X resource pool among the resource pools configured for the UE.

5. The method according to any one of claims 1 to 3, wherein In the case where the A2X communication service is a DAA service, the selection of the SL resource pool for the A2X communication service includes: In the case of determining that the first condition indicating that there is an SL resource pool among at least one of the SL resource pools having an A2X service information identifier matching the A2X communication service is not satisfied, perform the selection by any one of the following methods: Select an arbitrary SL resource pool from the SL resource pools configured for the UE; Select an SL resource pool for the DAA service from the SL resource pools among at least one of the SL resource pools that do not have the A2X service information identifier; Select an SL resource pool for the DAA service from among the SL pool sources in at least one of the SL resource pools other than the SL pool source having the A2X service information identifier that matches the BRID service; Select an SL resource pool for the DAA service from among the SL resource pools in the resource pool configured for the UE other than the A2X resource pool.

6. The method according to any one of claims 1 to 3, wherein After selecting an SL resource pool for the A2X communication service, if there is new data transmission, the method further includes: When the new data transmission is an SL grant associated with the selected SL resource pool, determine the target of the new data transmission based on the radio resource information indicated by the SL grant and the SL resource pool associated with the SL grant.

7. The method according to claim 6, wherein Determining the target of the new data transmission includes at least one of the following: Select any target related to A2X communication; If the selected SL resource pool has the A2X service information identifier, based on the A2X service information identifier, select one target related to A2X communication corresponding to the A2X communication service type of the new data transmission; If the selected SL resource pool does not have the A2X service information identifier, select one target associated with any one of unicast, multicast, and broadcast.

8. The method according to claim 1, wherein When it is determined that the second condition is satisfied, the selection of the SL resource pool for the A2X communication service includes any one of the following: Select a common SL resource pool as the SL resource pool for the A2X communication service; Select an SL resource pool that does not have the A2X service information identifier as the SL resource pool for the A2X communication service, The second condition indicates that there is an SL resource pool that does not have the A2X service information identifier, or the A2X service information identifier of the SL resource pool having the A2X service information identifier does not match the A2X communication service.

9. A user equipment, comprising: A processor; And A memory storing instructions, Wherein, the instructions, when run by the processor, execute the method according to any one of claims 1 to 8.

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