Method and apparatus for allocating resources for sidelink transmissions

Abstract

The present disclosure relates to methods and devices for allocating resources for sidelink transmissions between communication terminals in a wireless communication network. In one implementation, the method can include obtaining a first configuration message regarding allocation of sidelink resources for sidelink transmissions between user equipments. The method can also include determining to act as an anchor user equipment based on the first configuration message. The anchor user equipment can represent a type of user equipment that allocates sidelink resources for other user equipments. The method further includes transmitting a resource allocation message to a second user equipment regarding allocation of sidelink resources for the second user equipment.

Description

Technical Field

[0001] This disclosure generally relates to wireless communications, and more particularly to the allocation of resources for sidelink transmissions between communication terminals, including vehicles. Background Technology

[0002] Sidelink is a unilateral wireless communication service, i.e., communication between communication terminals. Vehicle networking (V2X) refers to a large-scale system for wireless communication and information exchange between vehicles, pedestrians, roadside equipment, and the internet, based on agreed-upon communication protocols and data exchange standards. V2X communication enables vehicles to achieve driving safety, improve traffic efficiency, and access convenient or entertaining information. Based on the object of wireless communication, V2X communication can be divided into three types: vehicle-to-vehicle (V2V) communication; vehicle-to-infrastructure / vehicle-to-network (V2I / V2N) communication; and vehicle-to-pedestrian (V2P) communication. These types of communication are collectively referred to as vehicle-to-everything (V2X) communication.

[0003] In the 3GPP's V2X communication research, sidelinks based on V2X communication methods between user equipment are one way to implement the V2X standard. In this method, traffic data is transmitted directly from the source user equipment to the destination user equipment via the air interface, without the need for base station and core network forwarding. Figure 1 As shown. This V2X communication is referred to as PC5-based V2X communication or V2X side link communication.

[0004] With technological advancements and development in the automation industry, V2X communication scenarios are becoming increasingly diverse and demanding higher performance. Advanced V2X services include vehicle platooning, extended sensors, advanced driver assistance (semi-autonomous and fully autonomous driving), and remote driving. Expected performance requirements may include: support for data packets ranging from 50 to 12,000 bytes, transmission rates of 2 to 50 messages per second, a maximum end-to-end latency of 3 to 500 milliseconds, reliability of 90% to 99.999%, data rates of 0.5 to 1,000 Mbps, and a transmission range of 50 to 1,000 meters. Summary of the Invention

[0005] This disclosure relates to methods, systems, and apparatuses related to wireless communication, and more specifically to methods, systems, and apparatuses for allocating resources for sidelink transmissions between communication terminals.

[0006] In one embodiment, a method performed by a first user equipment (UE) in a wireless communication network is disclosed. The method may include: acquiring a first configuration message regarding the allocation of sidelink resources for sidelink transmissions between UEs. The method may further include: determining, based on the first configuration message, an anchor UE. The anchor UE may represent a type of UE assisting in allocating sidelink resources for other UEs. The method may further include: transmitting a resource allocation message regarding the allocation of sidelink resources for a second UE.

[0007] In one embodiment, a method performed by a second user equipment (UE) in a wireless communication network is disclosed. The method may include: acquiring a second configuration message regarding the allocation of sidelink resources for sidelink transmissions between UEs. The method may further include: determining, based on the second configuration message, that a sidelink resource allocation is obtained via an anchor UE. The anchor UE may represent a type of UE assisting in allocating sidelink resources for other UEs. The method may further include: receiving a resource allocation message from a first UE acting as the anchor UE regarding the allocation of sidelink resources for the second UE.

[0008] In another embodiment, a device for wireless communication may include a memory storing instructions and processing circuitry communicating with the memory. When the processing circuitry executes the instructions, it is configured to implement the methods described above.

[0009] In another embodiment, a computer-readable medium includes instructions that, when executed by a computer, cause the computer to perform the methods described above.

[0010] The above and other aspects, as well as embodiments thereof, are described in more detail in the accompanying drawings, description, and claims below. Attached Figure Description

[0011] Figure 1 Example diagrams illustrating wireless communication networks according to various embodiments are provided.

[0012] Figure 2 A flowchart illustrating a method for allocating resources for sidelink transmission according to an embodiment is provided.

[0013] Figures 3A-3C A flowchart illustrating a method for allocating resources for sidelink transmission according to an embodiment is provided.

[0014] Figure 4 A flowchart illustrating a method for allocating resources for sidelink transmission according to another embodiment is provided.

[0015] Figure 5A flowchart illustrating a method for allocating resources for sidelink transmission according to another embodiment is provided. Detailed Implementation

[0016] The techniques and examples of the implementations and / or embodiments in this disclosure can be used to improve the performance of wireless communication systems. The term "exemplary" is used to mean "an example of..." and, unless otherwise stated, does not imply an ideal or preferred example, implementation, or embodiment. Section headings are used in this disclosure for ease of understanding and not to limit the techniques disclosed in a section to that section. However, it should be noted that these implementations can be embodied in a variety of different forms, and therefore, the covered or claimed subject matter is intended to be construed as not being limited to any of the embodiments set forth below. It should also be noted that implementations can be embodied as methods, apparatus, components, or systems. Therefore, embodiments of this disclosure can take the form of, for example, hardware, software, firmware, or any combination thereof.

[0017] A radio access network provides network connectivity between a user equipment (UE) and an information or data network, such as a text, voice, or video communication network, the Internet, etc. Example radio access networks may be based on cellular technology, which may also be based on, for example, 4G LTE or 5G NR technology and / or formats. Figure 1 An example system diagram of a wireless communication network 100 according to various embodiments is shown, including UEs 102, 124, and 126 and wireless access network nodes (WANNs) 104 and 128. UEs 102, 124, and 126 may include, but are not limited to: mobile phones, smartphones, tablets, laptops, in-vehicle communication devices, roadside communication devices, smart electronic products or appliances (including air conditioners, televisions, refrigerators, ovens), or other devices capable of wireless communication over the network. UEs may communicate directly with each other via sidelinks. Taking UE 102 as an example, UE 102 may include transceiver circuitry 106 coupled to antenna 108 to enable wireless communication with wireless access network node 104. Transceiver circuitry 106 may also be coupled to processor 110, which may also be coupled to memory 112 or other storage devices. Memory 112 may store instructions or code therein that, when read and executed by processor 110, cause processor 110 to perform one of the various methods described herein.

[0018] Similarly, WANNs 104 and 128 may include base stations or other wireless network access points capable of wirelessly communicating with one or more UEs via a network. WANNs may include: 4G LTE base stations, 5G NR base stations, 5G central unit base stations, or 5G distributed unit base stations. Each type of WANN can be configured to perform a corresponding set of wireless network functions. The set of wireless network functions may differ between different types of wireless access network nodes. However, the set of wireless network functions may functionally overlap between different types of wireless access network nodes. Taking WANN 104 as an example, WANN 104 may include transceiver circuitry 114 coupled to antenna 116, which may include antenna towers 118 of various types to enable wireless communication with UEs 102, 124, or 126. Transceiver circuitry 114 may also be coupled to one or more processors 120, which may also be coupled to memory 122 or other storage devices. Memory 122 may store instructions or code therein that, when read and executed by processor 120, cause processor 120 to perform one of the various methods described herein.

[0019] For simplicity and clarity, only two WANNs and three UEs are shown in the wireless communication network 100. It should be understood that multiple WANNs can exist in the wireless communication network, and each WANN can serve one or more UEs simultaneously. For example, WANN 118 is serving UEs 102, 124, and 126. As another example, WANN 118 is serving UEs 102 and 126, while WANN 128 is serving UE 124. In addition to UEs and WANNs, network 100 may also include any other network nodes with different functions, such as network nodes in the core network of wireless communication network 100. Furthermore, although various embodiments will be discussed in the context of the specific example wireless communication network 100, the basic principles apply to other applicable wireless communication networks.

[0020] In sidelink communication, such as V2X communication between UEs, the UE needs to frequently monitor its sidelink transmission resource pool, for example, through sensing, to obtain sidelink transmission resources from the pool. This results in significant power consumption and inefficiency. One objective of this disclosure is to reduce the power consumption of the UE when obtaining sidelink transmission resources. For example, the UE can request another UE acting as the anchor user equipment to assist in allocating sidelink resources for that UE. In this way, the other UE acting as the anchor user equipment can, for example, be responsible for sensing the UE's sidelink transmission resource pool. Therefore, the UE does not need to frequently sense the sidelink transmission resource pool, thereby saving related power consumption.

[0021] First Embodiment

[0022] Figure 2 An exemplary implementation 200 for allocating resources for sidelink transmissions of user equipment is described. (See reference...) Figure 1 and Figure 2 Various operations of a first user equipment (such as UE 102) are described, which acts as an anchor user equipment to assist in allocating sidelink resources for other user equipment.

[0023] Specifically, UE 102 can obtain a first configuration message (210) regarding the allocation of sidelink resources for sidelink transmissions between user equipments. For example, UE 102 can obtain the first configuration message from a WANN (such as WANN 118). Alternatively, UE 102 can pre-configure the first configuration message. As a result, UE 102 can obtain the first configuration message locally.

[0024] Then, UE 102 can determine the anchor user equipment (220) based on the first configuration message. The anchor user equipment can represent the type of user equipment that assists in allocating sidelink resources for other user equipments.

[0025] The first configuration message can provide the conditions that UE 102 is eligible to act as an anchor user equipment to assist in allocating sidelink resources for other user equipment or specific user equipment (such as UE 124). The first configuration message may include, for example, the following items:

[0026] • Does WANN 118 support an indication of whether user equipment assists in allocating sidelink resources for other users?

[0027] • The first channel quality threshold indicates that UE 102 can act as an anchor user equipment only when the channel quality between UE 102 and the cell serving UE 102 is higher than or equal to the first channel quality threshold.

[0028] • The second channel quality threshold indicates that UE 102 can act as an anchor user equipment to assist in allocating sidelink resources to UE 124 only when the channel quality between UE 102 and UE 124 is higher than or equal to the second channel quality threshold.

[0029] • Geographic distance threshold: This indicates that UE 102 can act as an anchor user equipment to assist in allocating sidelink resources to UE 124 only when the geographic distance between UE 102 and UE 124 is less than or equal to the geographic distance threshold.

[0030] • The regional difference threshold indicates that UE 102 can act as an anchor user equipment to assist in allocating sidelink resources to UE 124 only when the regional difference between UE 102 and UE 124 is less than or equal to the regional difference threshold.

[0031] • Indication on whether UE 102 and UE 124 are served in the same cell.

[0032] • Indication regarding whether UE 102 and UE 124 are located in the same area.

[0033] • Indication regarding whether UE 102 and UE 124 belong to the same side of the crosslink communication group.

[0034] • UE 102 can only act as an indicator of anchor user equipment when it acts as a relay user equipment or a roadside unit user equipment, and

[0035] • UE 102 can only assist in indicating the allocation of sidelink resources to user equipment that has already established a unicast or multicast connection with UE 102.

[0036] The above items can be used individually or in any suitable combination to determine whether UE 102 is eligible to act as an anchor user equipment. For example, if UE 102 acts as a relay user equipment or a roadside unit user equipment, i.e., supports relay or roadside unit functions, then UE 102 can be determined to act as an anchor user equipment to assist in allocating sidelink resources for other user equipment. As another example, when UE 102 and UE 124 are served in the same cell and the channel quality between UE 102 and UE 124 is higher than a second channel quality threshold, the UE can be determined to act as an anchor user equipment to assist in allocating sidelink resources for UE 124.

[0037] The thresholds included in the first configuration message (such as a first channel quality threshold, a second channel quality threshold, a geographical distance threshold, and a regional difference threshold) can represent the entry threshold that qualifies UE 102 to act as an anchor user equipment. Therefore, the first configuration message may also include a corresponding release threshold to disqualify UE 102 from acting as an anchor user equipment. For example, UE 102 may be disqualified from acting as an anchor user equipment if the channel quality between UE 102 and the cell serving UE 102 is lower than the first channel quality release threshold. Typically, the release threshold is less than the corresponding entry threshold. For example, the release threshold may be equal to the corresponding entry threshold minus / plus a positive / negative offset.

[0038] Alternatively, the first configuration message can explicitly instruct UE 102 to act as the anchor user equipment to assist in allocating sidelink resources for other user equipment.

[0039] For example, the first configuration message may indicate to UE 102 which specific user equipments (UEs) can assist in allocating sidelink resources. For each specific UE, the first configuration message may include, for example,

[0040] • User equipment identifier;

[0041] • Identification index, indicating the user equipment index in the set of user equipment reported by UE 102 to WANN 118;

[0042] • Transmission type, indicating that UE 102 can assist in allocating sidelink resources for user equipment sidelink transmissions in this transmission type, which may include, for example, unicast, multicast and broadcast;

[0043] • Destination identifier or destination identifier index, indicating that UE 102 can utilize the destination identifier or destination identifier index to assist in allocating sidelink resources for user equipment sidelink transmissions; and

[0044] • Sidelink service quality information, indicating that UE 102 can use sidelink service quality information to assist in allocating sidelink resources for user equipment sidelink transmissions.

[0045] In this way, UE 102 can automatically act as an anchor user equipment to assist in allocating sidelink resources for a specific user equipment.

[0046] For example, instead of directly indicating a specific user equipment (UE), the first configuration message may indicate multiple source / destination identifiers, each of which may identify one or more UEs for which UE 102 can assist in allocating sidelink resources. The source / destination identifier may refer to, for example, the type of sidelink traffic between two UEs in unicast or between multiple UEs in multicast. For example, a destination identifier for a sidelink transmission in unicast may identify a single destination UE, while a destination identifier for a sidelink transmission in multicast may identify multiple destination UEs. For each source / destination identifier, the first configuration message may also include, for example,

[0047] • Source / destination identifier

[0048] • Destination Identifier Index, indicating the index of the destination identifier in the set of destination identifiers reported by UE 102 to WANN 118.

[0049] • Transmission type, indicating that UE 102 is capable of allocating sidelink resources for sidelink transmissions of the user equipment identified by the source / destination identifier in this transmission type.

[0050] • Sidelink service quality information, indicating that UE 102 can use sidelink service quality information to assist in allocating sidelink resources for sidelink transmissions of user equipment identified by the source / destination identifier.

[0051] Optionally, UE 102 may need to receive a message from WANN 118 regarding the transport resource pool for sidelink communication. If UE 102 fails to receive such a message via system messages and UE 102 is in an idle state, UE 102 may determine not to act as an anchor user equipment. Alternatively, UE 102 may enter a Radio Resource Control (RRC) connected state to act as an anchor user equipment.

[0052] refer to Figure 2 If UE 102 determines that it can act as an anchor user equipment to assist in allocating side link resources for a second user equipment (such as UE 124), UE 102 may transmit a resource allocation message (230) to UE 124 regarding the allocation of side link resources for UE 124.

[0053] The resource allocation message may include, for example, an indication of whether the allocated sidelink resources can only be used to carry sidelink traffic to UE102; a destination identifier or destination identifier index indicating that the sidelink traffic of a second user equipment having a destination identifier or destination identifier index can use the allocated sidelink resources; a transmission type indicating that the sidelink traffic of a second user equipment having that transmission type can use the allocated sidelink resources; and sidelink service quality information indicating that the sidelink traffic of a second user equipment having sidelink service quality information can use the allocated sidelink resources.

[0054] In exemplary implementation 200, UE 102 can assist in allocating sidelink resources for UE 124 in the following three ways: (1) UE 102 can directly allocate sidelink resources; (2) UE 102 can forward sidelink resources allocated by WANN (such as WANN 118); and (3) UE 102 can transmit resource allocation assistance information to UE 124, enabling UE 124 to allocate its own sidelink resources. These three methods will be referred to respectively. Figures 3A-3C Describe it.

[0055] refer to Figure 3AUE 102 can directly allocate sidelink resources for UE 124. Specifically, UE 102 can allocate sidelink resources for UE 124 from UE 124's transport resource pool (2310). Information about the transport resource pool can be received from WANN 118. Then, UE 102 can, for example, transmit a resource allocation message (2312) indicating the allocated sidelink resources to UE 124 via a PC5RRC message. For example, the resource allocation message may include authorization configuration information for the sidelink configuration.

[0056] refer to Figure 3B UE 102 can forward the sidelink resources allocated by WANN 118 to UE 124. Specifically, UE 102 can receive a resource allocation message from WANN 118, which indicates that WANN 118 will allocate sidelink resources for UE 124 (2320). UE 102 can then transmit the resource allocation message to UE 124 (2322).

[0057] refer to Figure 3C UE 102 can obtain resource allocation assistance information for UE 124 to allocate side-link resources for itself in UE 124's transport resource pool (2330). UE 102 can then transmit a resource allocation message (2332) to UE 124, including the resource allocation assistance information. The resource allocation assistance information may indicate, for example, a list of available side-link resources or a list of unavailable side-link resources. The list of available side-link resources may be sorted in descending order of channel quality, i.e., from high quality to low quality.

[0058] Return to Figure 2 Optionally, before receiving the first configuration message from WANN 118 (210), UE 102 may transmit first auxiliary information to WANN 118 to facilitate WANN 118 in generating the first configuration message. The first auxiliary information may include, for example, an indication that UE 102 has the capability to act as an anchor user equipment to assist in allocating sidelink resources for other user equipments, an indication of whether UE 102 is interested in assisting in allocating sidelink resources for other user equipments, and an indication that UE 102 is a group header of a multicast communication group.

[0059] The first auxiliary information may also include, for example, an indication of the set of member information for individual user equipment in the sidelink communication group. The member information for user equipment in the sidelink communication group may include, for example,

[0060] • User equipment identifier;

[0061] • Auxiliary information about user equipment may include, for example, traffic cycle, timing offset, message size, sidelink destination index, and sidelink quality of service flow identifier;

[0062] • Sidelink information of the user equipment, which may include, for example, a list of information on frequencies of interest, destination identifiers, transmission types, and a list of sidelink quality of service information;

[0063] • Power saving information for user equipment;

[0064] • An indication of whether the user equipment supports a mode in which the user equipment assists in allocating sidelink resources for other user equipment; and

[0065] • Whether to support an indication of resources scheduled via user equipment.

[0066] Optionally, before transmitting a resource allocation message (230) to UE 124 regarding the allocation of sidelink resources for UE 124, UE 102 may receive auxiliary information about UE 124 from UE 124 to facilitate UE 102's allocation of sidelink resources for UE 124. The auxiliary information may include, for example, traffic period, timing offset, message size, sidelink destination identifier or identifier index, frequency of interest, transmission type, sidelink quality of service flow identifier, and power-saving information for UE 124.

[0067] Second Embodiment

[0068] Figure 4 An exemplary implementation 400 for allocating sidelink transmission resources for user equipment is described. (See reference...) Figure 1 and Figure 4 Various operations of a second user equipment (e.g., UE 124) are described, which obtains sidelink resources for its sidelink transmissions via an anchor user equipment.

[0069] Specifically, UE 124 can obtain a second configuration message (410) regarding the allocation of sidelink resources for sidelink transmissions between user equipments. For example, UE 124 can obtain the second configuration message from a WANN (such as WANN 118). Alternatively, UE 124 can pre-configure the second configuration message. As a result, UE 124 can obtain the second configuration message locally.

[0070] Then, UE 124 can determine, based on the second configuration message, the side traversal resource allocation obtained via the anchor user equipment (420). The anchor user equipment can represent the type of user equipment that assists in allocating the side traversal resource allocation for other user equipments. Then, UE 124 can receive a resource allocation message (430) from UE 102, which acts as the anchor user equipment, regarding the allocation of side traversal resource allocation for UE 124.

[0071] The second configuration message can provide conditions that allow UE 124 to obtain sidelink resource allocation via the anchor user equipment or a specific user equipment (such as UE 102) acting as the anchor user equipment. The second configuration message may include, for example, the following items:

[0072] • Does WANN 118 support an indication of whether user equipment assists in allocating sidelink resources for other users?

[0073] • The first channel quality threshold indicates that UE 124 can only obtain sidelink resource allocation via the anchor user equipment if the channel quality between UE 124 and the cell serving UE 124 is lower than or equal to the first channel quality threshold.

[0074] • The second channel quality threshold indicates that UE 124 can only obtain sidelink resource allocation via UE 102 if the channel quality between UE 102 and UE 124 is higher than or equal to the second channel quality threshold.

[0075] • Geographic distance threshold: This indicates that UE 124 can only obtain sidelink resource allocation via UE 102 if the geographic distance between UE 102 and UE 124 is less than or equal to the geographic distance threshold.

[0076] • The regional difference threshold indicates that UE 124 can only obtain sidelink resource allocation via UE 102 if the regional difference between UE 102 and UE 124 is less than or equal to the regional difference threshold.

[0077] • Indication on whether UE 102 and UE 124 are served in the same cell.

[0078] • Indication regarding whether UE 102 and UE 124 are located in the same area, or

[0079] • Indication of whether UE 102 and UE 124 belong to the same side of the crosslink communication group.

[0080] The above items can be used individually or in any suitable combination to determine whether UE 124 can obtain sidelink resource allocation for its sidelink transmission via the anchor user equipment. For example, if the channel quality between UE 124 and the cell serving UE 124 is below a first channel quality threshold, then UE 124 can obtain sidelink resource allocation via the anchor user equipment. As another example, when UE 102 and UE 124 are served in the same cell and the geographical distance between UE 102 and UE 124 is below a geographical distance threshold, UE 124 can determine that it can obtain sidelink resource allocation via UE 102, which acts as the anchor user equipment.

[0081] Alternatively, the second configuration message can explicitly instruct UE 124 to obtain sidelink resource allocation via the anchor user equipment.

[0082] For example, the second configuration message may indicate which specific user equipments (UEs) acting as anchor UEs can assist in allocating sidelink resources for UE 124. For each specific UE, the second configuration message may include, for example,

[0083] • User equipment identifier;

[0084] • Identification index, indicating the index of a user equipment in the set of user equipment reported by UE 124 to WANN 118;

[0085] • Transmission type, indicating that the user equipment is able to assist in allocating sidelink resources for the user equipment's sidelink transmissions in this transmission type, and the transmission type may include, for example, unicast, multicast and broadcast;

[0086] • Destination index, indicating that the user equipment can utilize the destination index to assist in allocating sidelink resources for UE 124's sidelink transmissions; and

[0087] • Sidelink service quality information indicates that the user equipment can use the sidelink service quality information to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0088] For example, instead of indicating a specific user equipment (UE), the second configuration message can indicate multiple source identifiers or destination identifiers, each of which can identify one or more UEs acting as anchor UEs, in order to facilitate the allocation of sidelink resources for UE 124. As mentioned above, the source / destination identifier can refer to the type of sidelink traffic, such as sidelink traffic between two UEs in unicast and sidelink traffic between multiple UEs in multicast. The source / destination identifier can identify one or more source / destination UEs.

[0089] For each source / destination identifier, the second configuration message may include, for example,

[0090] • Source identifier / Destination identifier

[0091] • Identifier index, indicating the source / destination identifier index in the source / destination identifier set reported by UE 124 to WANN 118.

[0092] • Transmission type, indicating that the user equipment identified by the source / destination identifier is able to assist in allocating sidelink resources for UE 124's sidelink transmissions in this transmission type, and

[0093] • Sidelink service quality information, indicating that the user equipment identified by the source / destination identifier can use the sidelink service quality information to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0094] The data structure for sidelink service quality information can be defined as follows, using an example:

[0095]

[0096] Optionally, before receiving the second configuration message for WANN 118, UE 124 may transmit second auxiliary information to WANN 118 to facilitate the WANN generating the second configuration message. The second auxiliary information may include, for example, an indication that UE 124 has the capability to obtain sidelink resource allocation via the anchor user equipment, an indication that UE 124 will obtain sidelink resource allocation via the anchor user equipment, an indication that UE 124 is a member of a sidelink multicast communication group, an identifier of the sidelink multicast communication group of its member, an indication that UE 124 is a set of member information for individual user equipment in the sidelink communication group of its member, an indication of the group header of the sidelink communication group of its member, and power-saving requirements of UE 124.

[0097] The second auxiliary information may also include, for example, indication information for a set of candidate user equipments (User Equipments) acting as anchor User Equipments (AUEs) to assist in the allocation of sidelink resources to UE 124. The indication information for the set of candidate AUEs may include, for example, identifiers of the candidate AUEs; source / destination identifiers of the candidate AUEs; indications of whether the candidate AUEs support a mode in which AUEs assist in the allocation of sidelink resources to other AUEs; channel quality information between the candidate AUEs and UE 124; channel quality information between the candidate AUEs and the cells serving the candidate AUEs; the current load rate of the candidate AUEs; the channel busy rate (CBR) of the candidate AUEs' transport resource pool; the resource utilization rate of the resources to be allocated by the candidate AUEs; the amount of resources to be allocated by the candidate AUEs; the number of AUEs for which the candidate AUEs are acting as anchor User Equipments to assist in the allocation of sidelink resources; and the geographical location identifier of the candidate AUEs.

[0098] Third Embodiment

[0099] This embodiment will discuss the communication process between UE 102 and UE 124 by way of example, so that UE 102 assists in allocating sidelink resources for UE 124, which will refer to Figure 5 Describe it.

[0100] Specifically, UE 102 can transmit a sidelink message (502) indicating that UE 102 is acting as an anchor user equipment. The sidelink message can be carried in a sidelink broadcast message, a sidelink multicast message, a sidelink RRC message, a PC5-MIB message, or a sidelink control information message. Therefore, the sidelink message can be transmitted to UE 124 via broadcast, multicast, or unicast.

[0101] In some implementations, the sidelink message may include, for example, access control information about UE 102. The access control information may include, for example, the channel quality between UE 102 and the cell serving UE 102, the current load rate of UE 102, the number of user equipments for which UE 102 is assisting in allocating sidelink resources, the geographic location identifier of UE 102, and the quality of service supported by UE 102.

[0102] Alternatively or additionally, the sidelink message may include, for example, an indication that UE 102 supports relay or roadside unit functionality, and a resource allocation mode for UE 102 (which may include, for example, a radio access network node scheduling resource mode and a user equipment selection resource mode). The sidelink message may also include, for example, a destination identifier indicating that UE 102 can utilize the destination identifier to assist in allocating sidelink resources for UE 124's sidelink transmission; quality of service information indicating that UE 102 can utilize quality of service information to assist in allocating sidelink resources for UE 124's sidelink transmission; a transmission type indicating that UE 102 can assist in allocating sidelink resources for UE 124's sidelink transmission in that transmission type; a serving cell identifier indicating the cell serving UE 124; the amount of allocable resources in the transmission resource pool; the CBR of the transmission resource pool; and a resource utilization rate indicating the ratio of allocated resources to allocable resources in the transmission resource pool.

[0103] UE 124 may receive a sidelink message indicating that UE 102 is acting as an anchor user equipment (504). Upon receiving the sidelink message, UE 124 may transmit a request message to UE 102 requesting assistance in allocating sidelink resources for UE 124 (506). The request message may include, for example, the identifier of UE 124, power-saving information of UE 124, the sidelink destination index or destination identifier used by UE 124 in sidelink transmission, the sidelink source index or source identifier used by UE 124 in sidelink transmission, the sidelink quality of service information used by UE 124 in sidelink transmission, coverage status information indicating whether UE 124 is within or outside the coverage area of ​​any radio access network node, the serving cell identifier indicating the cell serving UE 124, a list of frequency information to be used by UE 124 in sidelink transmission, and the sidelink transmission type to be used by UE 124 in sidelink transmission.

[0104] UE 102 can receive a request message (508) from UE 124. In response to the request message, UE 102 can send a response message (510) to UE 124 indicating whether to assist in allocating sidelink resources for UE 124.

[0105] UE 124 can receive a response message (512) from UE 102. If the response message indicates that UE 102 will assist in allocating sidelink resources for UE 124, the response message may include information such as the following to facilitate UE 124 obtaining sidelink resource allocation via UE 102:

[0106] • Scheduling request configuration set information, indicating the resource configuration used by UE 124 to transmit the scheduling request to UE 102.

[0107] • Destination identifier list, which indicates that UE 102 can utilize one or more destination identifiers in the destination identifier list to assist in allocating sidelink resources for sidelink transmissions of the second user equipment.

[0108] • Quality of Service (QoS) information, which indicates that UE 102 can utilize QoS information to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0109] • Transmission type, which indicates that UE 102 is able to assist in allocating sidelink resources for UE 124's sidelink transmission in this transmission type, and

[0110] • The range of the HARQ process ID list indicates that UE 102 can utilize the HARQ process IDs within the range of the HARQ process ID list to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0111] Optionally, the response message may also include, for example, information about the transport resource pool of UE 124.

[0112] Optionally, if the response message indicates that UE 102 will assist in allocating sidelink resources for UE 124, UE 102 may transmit scheduling request configuration information (514) to UE 124 separately.

[0113] UE 124 can receive scheduling request configuration information from UE 102 (516). Then, when UE 124 needs to perform a side link transmission, UE 124 can generate a scheduling request for the side link transmission based on the received scheduling request configuration information (518) and transmit the scheduling request to UE 102 (520).

[0114] In response to receiving a scheduling request (522), UE 102 may, for example, allocate sidelink resources in the transmission resource pool of UE 124 (524) and transmit a resource allocation message (526) to UE 124 including information on the allocated sidelink resources.

[0115] Alternatively, UE 102 may transmit buffer status report configuration information to UE 124. UE 124 may then generate a buffer status report based on the buffer status report configuration information and transmit the buffer status report to UE 102. In response to receiving the buffer status report, UE 102 may, for example, allocate sidelink resources (524) from UE 124's transport resource pool and transmit a resource allocation message (526) to UE 124 including information about the allocated sidelink resources.

[0116] Optionally, before transmitting a request message to UE 102 requesting assistance in allocating sidelink resources for UE 124 (506), if UE 124 is covered by a WANN (such as WANN 118), UE 124 may transmit an RRC message to WANN 118. The RRC message may carry, for example, the identifier of UE 124, the identifier of the cell serving UE 124, power saving information of UE 124, the sidelink destination index or destination identifier to be used by UE 124 in sidelink transmission, the sidelink quality of service information to be used by UE 124 in sidelink transmission, the list of frequency information to be used by UE 124 in sidelink transmission, and the sidelink transmission type to be used by UE 124 in sidelink transmission.

[0117] Then, UE 124 can receive RRC messages from WANN 118. The RRC message can indicate whether UE 124 is allowed to obtain sidelink resource allocation via UE 102.

[0118] Optionally, the RRC message may include, for example, information about the transport resource pool, indicating the range of the transport resource pool for UE 124. The RRC message may also include, for example,

[0119] • Transmission type, indicating that UE 102 can assist in allocating sidelink resources for user equipment sidelink transmissions in this transmission type;

[0120] • Destination identifier, indicating that UE 102 can use the destination identifier to assist in allocating sidelink resources for UE 124's sidelink transmission;

[0121] • Sidelink service quality information, indicating that UE 102 can utilize the sidelink service quality information to assist in allocating sidelink resources for UE 124's sidelink transmission; and

[0122] • The range of the HARQ process ID list indicates that UE 102 can utilize the HARQ process IDs within the range of the HARQ process ID list to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0123] Optionally, before transmitting a response message to UE 124 indicating whether to assist in allocating sidelink resources for UE 124 (510), UE 102 may transmit Radio Resource Control (RRC) signaling to WANN 118 to request authorization to assist in allocating sidelink resources for UE 124. The RRC signaling may include, for example, one or more identification information of UE 124; power saving information of UE 124; a sidelink destination index or destination identifier of interest to UE 124 in sidelink transmissions; sidelink quality of service information to be used by UE 124 in sidelink transmissions; a list of frequency information of interest to UE 124 in sidelink transmissions; and a sidelink transmission type to be used by UE 124 in sidelink transmissions.

[0124] Then, UE 102 can receive an RRC message from WANN 118, which indicates whether UE 102 is authorized or permitted to assist in allocating sidelink resources for UE 124. The RRC message may also include, for example,

[0125] • User equipment identification information, indicating that UE 102 can assist in allocating sidelink resources for user equipment.

[0126] Information regarding the transport resource pool indicates that UE 102 assists in allocating sidelink resources within the transport resource pool.

[0127] • Scheduling request configuration set information, used to configure scheduling request resources for UE 124.

[0128] • The range of the Hybrid Automatic Repeat Request (HARQ) process ID list indicates that UE 102 can utilize HARQ process IDs within the range of the HARQ process ID list to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0129] • Destination identifier, indicating that UE 102 can use the destination identifier to assist in allocating sidelink resources for UE 124's sidelink transmission.

[0130] • Quality of Service (QoS) information indicates that UE 102 can utilize QoS information to assist in allocating sidelink resources for UE 124's sidelink transmissions.

[0131] • Transmission type, indicating that UE 102 can assist in allocating sidelink resources for UE 124's sidelink transmission in this transmission type, and

[0132] • A list of sidelink radio bearers (SLRBs) or logical channels, indicating that UE 102 can assist in allocating sidelink resources for UE 124's sidelink radio bearers or logical channels.

[0133] Fourth embodiment

[0134] By way of example, this embodiment will discuss how UE 124 selects a specific user equipment (such as UE 102) to assist in the allocation of sidelink resources to UE 124 when multiple user equipments are available to act as anchor user equipments to assist in the allocation of sidelink resources to UE 124.

[0135] UE 124 can receive sidelink messages from multiple user equipments (such as UEs 102, 126, and 130). The sidelink messages can indicate that a user equipment is acting as an anchor user equipment and can include information indicating its eligibility to act as an anchor user equipment. For example, the sidelink messages can include an indication of whether a user equipment is a group header of a sidelink communication group. Based on the sidelink messages, UE 124 can then identify which of the multiple user equipments serves as the group header of the sidelink communication group to which UE 124 is a member. If such a user equipment is identified, UE 124 can directly select that user equipment to assist in allocating sidelink resources for UE 124.

[0136] Alternatively or additionally, UE 124 may first select candidate user equipments from multiple user equipments that meet predetermined candidate criteria based on sidelink messages. Predetermined candidate criteria may include, for example, the following items:

[0137] • The load rate of user equipment is lower than the load rate threshold.

[0138] The number of user equipments assisting in allocating sidelink resources to user equipment is below a certain threshold.

[0139] • The channel quality of the user equipment is higher than the channel quality threshold.

[0140] • The QoS range supported by the user equipment includes the QoS of the sidelink data that UE 124 needs to transmit.

[0141] • The availability of resources allocated to user equipment is greater than the resource availability threshold.

[0142] • The resource utilization rate of the resources to be allocated to the user equipment is lower than the resource utilization rate threshold.

[0143] • The CBR of the user equipment's transmission resource pool is lower than the CBR threshold.

[0144] The sidelink group communication destination identifier list includes the sidelink group communication destination identifiers for the sidelink data that UE 124 wants to transmit.

[0145] The user equipment and UE 124 belong to the same side-link communication group.

[0146] • The geographical distance between the user equipment and UE 124 is less than the geographical distance threshold, or

[0147] • User equipment and UE 124 are served in the same cell.

[0148] Then, when a candidate user equipment meets predetermined selection criteria, UE 124 can select one of the candidate user equipment to assist in allocating sidelink resources for UE 124. The predetermined selection criteria may include, for example, the following:

[0149] • Candidate user equipment is the group header of the side link communication group.

[0150] • The candidate user equipment has the best channel quality between the candidate user equipment and the cell serving the candidate user equipment, or between the candidate user equipment and UE 124.

[0151] Candidate user equipment and UE 124 belong to the same side-link communication group.

[0152] • Candidate user equipment and UE 124 are served in the same cell.

[0153] The resource allocation mode for candidate user equipment is the radio access network node scheduling mode.

[0154] The candidate user equipment has the most allocable resources.

[0155] • The candidate user equipment has the lowest resource utilization relative to the resources to be allocated to it.

[0156] • The candidate user equipment's transmission resource pool has the lowest channel busy rate.

[0157] • The candidate user equipment supports roadside unit functionality, or

[0158] • Candidate user equipment supports relay functionality.

[0159] Optionally, UE 124 may receive predetermined criteria from WANN 118 before selecting candidate user equipments that meet predetermined criteria from multiple user equipments. For example, UE 124 may receive metrics from WANN 118, such as load rate threshold, quantity threshold, channel quality threshold, service quality range supported by user equipment, and geographical distance threshold. Alternatively, the metrics may be pre-configured in UE 124.

[0160] Fifth Embodiment

[0161] When UE 124 is covered by a WANN (such as WANN 118) and is in an RRC idle state, UE 124 can determine whether to select UE 102 to assist in allocating sidelink resources for UE 124 based on the configuration in WANN 118.

[0162] Specifically, UE 124 can receive configuration information from WANN 118, which may include, for example, an indication of whether UE 124 supports UEs that assist in allocating sidelink resources for other UEs, an indication of whether UE 102 and UE 124 must be served in the same cell, an indication of whether UE 102 and UE 124 must be located in the same area, and an indication of whether UE 102 and UE 124 must belong to the same V2X communication group.

[0163] If the configuration requires that UE 102 and UE 124 must be served in the same cell, then UE 124 can only select UE 102 to assist in allocating sidelink resources for UE 124 if UE 124 and UE 102 are served in the same cell. Thus, the sidelink messages transmitted from UE 102 to UE 124 may also include, for example, the identifier of the access cell of UE 102 or the Public Land Mobile Network (PLMN) identifier.

[0164] If the configuration requires UE 102 and UE 124 to be served in different cells, then UE 102 must know the range of the transport resource pool that can be allocated to UE 124, and allocate sidelink resources for UE 124 based on the transport resource pool.

[0165] Subsequently, UE 124 may transmit a request message to UE 102 requesting sidelink resource allocation. This request message may also include, for example, UE 124's transport resource pool. After transmitting a response message, UE 102 may allocate sidelink resources for UE 124 within the scope of UE 124's transport resource pool.

[0166] Sixth Embodiment

[0167] If UE 124 is located outside the coverage area of ​​any WANN, UE 124 can indicate to UE 102 in a request message sent to UE 102 that UE 124 is outside the coverage area of ​​any WANN. In this way, UE 102 can allocate sidelink resources for UE 124 based on UE 102's transport resource pool.

[0168] Specifically, UE 102 can transmit a sidelink message to UE 124 indicating that UE 102 is acting as an anchor user equipment. This sidelink message may include, for example, access control information.

[0169] Upon receiving a sidelink message, UE 124 may transmit a request message to UE 102 requesting sidelink resource allocation. This request message may include, for example, coverage status information indicating that UE 124 is outside the coverage area.

[0170] Upon receiving the request message, UE 102 may transmit a response message indicating that UE 102 will assist in allocating sidelink resources for UE 124, or UE 102 will refuse to assist in allocating sidelink resources for UE 124.

[0171] After transmitting a response message indicating that UE 102 will assist in allocating sidelink resources for UE 124, UE 102 can directly allocate sidelink resources for UE 124 and transmit information about the allocated sidelink resources to UE 124.

[0172] Seventh Embodiment

[0173] A regular user equipment (such as UE 124) can select an anchor user equipment to obtain sidelink resources for UE 124's sidelink transmissions via the anchor user equipment. The anchor user equipment can assist in allocating sidelink resources based on the results of sensing the available transmission resources in the transmission resource pool. Therefore, the regular user equipment does not need to perform sensing. Nevertheless, the regular user equipment must pre-configure its own sidelink resources to send scheduling requests to the anchor user equipment, which will be considered in the context of the following two scenarios:

[0174] Scenario 1: A group header UE or a UE designated by the WANN can act as an anchor UE, relative to UEs communicating within a sidelink group. In this case, group information is required to be available at the access layer (AS), and the anchor UE can only allocate sidelink resources to UEs within the group.

[0175] Specifically, during the establishment of a sidelink communication group, each newly joined UE may need to notify the group header UE whether it requires the anchor UE to allocate sidelink resources for it. Typically, if the UE is outside coverage or in an idle state, and the UE has power-saving requirements, the UE may require the anchor UE's assistance in allocating sidelink resources. In this case, the group header UE may consider assisting in allocating sidelink resources for the UE under the following circumstances:

[0176] 1) When the group header UE meets predetermined conditions and is in RRC connected state, the group header UE can assist in allocating sidelink resources for other UEs. Predetermined conditions may include: the UE will assist in allocating sidelink resources for other UEs; the UE will assist in allocating sidelink resources for other UEs; the UE's channel quality is above a threshold when the group header UE is within coverage area; and the geographical distance between the UE allocating sidelink resources and the UE to be allocated sidelink resources is less than a threshold. For example, they are located in the same or adjacent areas and are served by the same cell. If the geographical distance is large, the sensing results may be inaccurate. If the two UEs are not covered by the same cell, the scheduling of radio access network nodes may interfere with both UEs.

[0177] The group header UE can report group information to the serving WANN. This group information may include the UEs in the group and the UEs for which the group header UE needs assistance in allocating sidelink resources. After receiving authorization from the serving WANN, the group header UE requests sidelink resources for the UEs within the group. For example, the group header UE can report its assistance information, and the WANN dynamically schedules or semi-persistently allocates resources. The WANN can accurately allocate sidelink resources for each UE to be scheduled. Alternatively, the WANN can allocate a transport resource pool for the group header UE, so that the group header UE can allocate sidelink resources for other UEs in the group based on the transport resource pool. The WANN can dynamically allocate the transport resource pool or semi-persistently schedule the transport resource pool.

[0178] 2) If the group header UE does not meet the predetermined conditions, the group header UE can designate another UE in the group to act as the anchor user equipment to assist in allocating sidelink resources for other UEs in the group.

[0179] This means that if the group header UE cannot act as the anchor UE to assist in allocating sidelink resources for other UEs in the group, the group header UE can notify the UE that it does not support the mode of UE assisting in allocating sidelink resources for other UEs, and the UE can obtain sidelink resources in the normal manner. Alternatively, the group header UE can query whether other UEs in the group meet predetermined conditions and will act as the anchor UE. If such a UE exists, the group header UE can designate that UE to act as the anchor UE to assist in allocating sidelink resources for other UEs in the group. Upon receiving this designation, the UE acting as the anchor UE can report to the WANN, for example, which other UEs require resource scheduling, obtain authorization from the WANN, etc.

[0180] 3) When a group-head UE meets predetermined conditions but is in an RRC idle state or outside the coverage area of ​​any WANN, the group-head UE can assist in allocating sidelink resources in two ways: (a) the group-head UE can obtain sidelink resources through sensing and allocate them to other UEs; (b) the group-head UE can designate another UE within the group to allocate sidelink resources to other UEs within the group. Additionally, even if the group-head UE is within the coverage area of ​​the WANN, the WANN can configure the group-head UE to allocate sidelink resources for other UEs through sensing.

[0181] Scenario 2: WANN can specify a UE to act as an anchor user equipment, such as a trunk UE, an RSU UE, and other UEs that will act as anchor user equipment.

[0182] The UE can report its ability to act as an anchor user equipment in the capability information to the WANN, and indicate in the sidelink UE information that the UE will assist in allocating sidelink resources for other UEs. The WANN can then configure the conditions that a UE must meet to act as an anchor user equipment. These conditions may include, for example, that the UE's channel quality is above a threshold when the UE is within coverage area, and that the geographical distance between the UE allocating sidelink resources and the UE to be allocated sidelink resources is less than a threshold. For example, they may be located in the same or adjacent areas, and be served by the same cell. If the geographical distance is large, the sensing results may be inaccurate. If the two UEs are not in the same cell, the scheduling of the radio access network node may interfere with both UEs.

[0183] When a UE determines that it can act as an anchor user equipment to assist in allocating sidelink resources for other UEs, the UE can transmit an indication that it is acting as an anchor user equipment via SCI or PC5-MIB messages. When nearby UEs with power-saving needs receive the indication, these UEs can establish unicast connections with the anchor UE and exchange relevant configuration information via PC5-RCC, such as PC5 SR configuration information and receive resource pool information. Receive resource pool information may include, for example, the range of resource pools used for transmitting sidelink grants, and the range of resource pools used to monitor sidelink grants after the UE transmits the PC5 SR.

[0184] When a UE acting as the anchor user equipment (such as UE 102) is in an RRC connection state, the UE can transmit a request message to request the WANN serving the UE (such as WANN 118) to configure SR resources used for other UEs as sidelink resources to be allocated, and to notify the other UEs of the configured SR resources. This request message may include, for example, the number of UEs to be allocated sidelink resources, the UE's identifier, etc. Furthermore, UE 102 can allocate multiple SR resources to each UE according to traffic type. Specifically, when UE 102 determines it is acting as the anchor user equipment, WANN 118 can pre-allocate multiple SR resources for UE 102. Thus, when other UEs establish a connection with UE 102, UE 102 can allocate SR resources to those other UEs. Alternatively, UE 102 can request WANN 118 to allocate PC5 SR resources only when a UE establishes a connection with UE 102 to request sidelink resource allocation.

[0185] When a UE (such as UE 124) to be allocated sideline resources is in an RRC connected state, the WANN serving that UE (such as WANN 128) can configure a PC5 SR for that UE. Then, WANN 128 can notify the PC5 SR to the UE (such as UE 102) that assisted in allocating sideline resources for UE 124.

[0186] Optionally, the release threshold can be configured to disqualify a UE (such as UE 102) from acting as an anchor user equipment, or to disqualify a UE (such as UE 124) from obtaining sidelink resource allocation via another UE acting as an anchor user equipment. Specifically, when the release threshold is met, the connection between UE 102 and UE 124 can be released. UE 102 or UE 124 can command the connection release.

[0187] Optionally, in addition to assisting in allocating sidelink resources for other UEs, a UE acting as an anchor user equipment can forward SLRB configurations configured by the WANN for other UEs.

[0188] Throughout this specification and claims, terms may have subtle meanings implied or suggested by the context, in addition to their expressly stated meanings. Similarly, the phrase "in one embodiment / implementation" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation" as used herein does not necessarily refer to a different embodiment. For example, the subject matter intended for the claims may include all or part of the exemplary embodiments.

[0189] Generally, terms can be understood, at least in part, from their usage in context. For example, terms such as “and,” “or,” and “and / or,” as used herein, can include a variety of meanings that can depend, at least in part, on the context in which they are used. Typically, if “or” is used to relate a list such as A, B, or C, it is intended to mean A, B, and C as used herein in an inclusive sense, and A, B, or C as used herein in an exclusive sense. Additionally, the term “one or more,” as used herein, depends, at least in part on the context, and can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, terms such as “a,” “an,” or “the” can be understood to convey a singular usage or a plural usage, at least in part on the context. Furthermore, the term “based on” can be understood to not necessarily convey an exclusive set of factors, but can similarly depend, at least in part on the context, to allow for the existence of additional factors that are not necessarily explicitly described.

[0190] Throughout this specification, references to features, advantages, or similar language do not imply that all features and advantages achievable using this solution should be or are included in any single implementation thereof. Rather, language relating to features and advantages is to be understood as meaning that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of this solution. Therefore, throughout this specification, the discussion of features and advantages, and similar language, may, but do not necessarily, refer to the same embodiments.

[0191] Furthermore, the features, advantages, and characteristics described in this solution can be combined in any suitable manner in one or more embodiments. Those skilled in the art will recognize that, based on the description herein, this solution can be practiced without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages may be recognized in some embodiments that may not be present in all embodiments of this solution.

Claims

1. A method performed by a first user equipment in a vehicle-to-everything (V2X) communication, comprising: Obtain a first configuration message regarding the allocation of sidelink resources for sidelink transmissions between user equipments, wherein the first configuration message includes satisfying conditions for a user equipment to be eligible to act as an anchor user equipment, the anchor user equipment representing a user equipment type that assists in allocating sidelink resources for other user equipments; In response to the first user equipment satisfying the condition in the first configuration message, it is determined to act as the anchor user equipment; as well as A resource allocation message is transmitted to a second user equipment regarding the allocation of sidelink resources for the second user equipment. Transmitting the resource allocation message includes: transmitting a resource allocation message to the second user equipment including resource allocation assistance information, so that the second user equipment selects sidelink resources based on the resource allocation assistance information to perform sidelink transmission. The resource allocation assistance information is obtained based on the anchor user equipment's knowledge of the second user equipment's sidelink transmission resource pool, and the resource allocation assistance information indicates a list of available sidelink resources or a list of unavailable sidelink resources.

2. The method according to claim 1, wherein obtaining the first configuration message includes: Receive the first configuration message from the wireless access network node; or Obtain the first configuration message pre-configured in the first user equipment.

3. The method according to claim 2, further comprising: Transmit a sidelink message, the sidelink message indicating that the first user equipment acts as the anchor user equipment; Receive a request message from the second user equipment, the request message requesting assistance in allocating sidelink resources for the second user equipment; as well as In response to the request message, a response message is transmitted to the second user equipment, the response message indicating whether to assist in allocating sidelink resources for the second user equipment.

4. The method according to claim 3, wherein, The response message also includes at least one of the following: The scheduling request configuration set information indicates the resource configuration used by the second user equipment to transmit the scheduling request to the first user equipment. A destination identifier list, which indicates that the first user equipment can utilize one or more destination identifiers in the destination identifier list to assist in allocating sidelink resources for the sidelink transmission of the second user equipment. Quality of Service (QoS) indicates that the first user equipment (UE) is able to utilize the QoS to assist in allocating sidelink resources for sidelink transmissions of the second UE, and A transmission type, which indicates that the first user equipment is able to assist in allocating sidelink resources for the second user equipment's sidelink transmissions in the transmission type, wherein the transmission type includes at least one of unicast, multicast, and broadcast.

5. The method according to claim 3, wherein, The sidelink message also includes at least one of the following: Access control information, which includes at least one of the following: The channel quality between the first user equipment and the cell serving the first user equipment. The current load rate of the first user equipment, The first user equipment is assisting in allocating sidelink resources to the number of user equipments available for it. The geolocation identifier of the first user equipment, and The quality of service supported by the first user equipment; The first user equipment supports an indication of relay function or roadside unit function; The resource allocation mode for the first user equipment includes a radio access network node scheduling resource mode or a user equipment selection resource mode. A destination identifier, which indicates that the first user equipment can use the destination identifier to assist in allocating sidelink resources for the sidelink transmission of the second user equipment; Quality of Service (QoS) indicates that the first user equipment is able to use the QoS to assist in allocating sidelink resources for the sidelink transmission of the second user equipment. Transmission type, which indicates that the first user equipment is able to assist in allocating sidelink resources for the second user equipment's sidelink transmission in the transmission type; Serving cell identifier, which indicates the cell serving the first user equipment; The number of allocatable resources in the transmission resource pool; The channel busy rate of the transmission resource pool; Resource utilization rate indicates the ratio of allocated resources to available resources.

6. The method according to claim 3, wherein, The sidelink messages are carried in sidelink broadcast messages, sidelink multicast messages, sidelink radio resource control messages, PC5-MIB messages, or sidelink control information messages.

7. The method according to claim 3, further comprising: Before transmitting the response message to the second user equipment, radio resource control signaling is transmitted to the radio access network node, the radio resource control signaling including at least one of the following: One or more identification information of the second user equipment, Power saving information for the second user equipment The second user equipment is interested in the sidelink destination index or destination identifier during sidelink transmission. The quality of service (QoS) of the sidelink used by the second user equipment in sidelink transmission. The second user equipment's list of frequency information of interest in sidelink transmission, and The sidelink transmission type to be used by the second user equipment in sidelink transmission; and Receive a radio resource control message from the radio access network node, the radio resource control message including at least one of the following: Whether to authorize or permit the first user equipment to assist in allocating sidelink resources for the second user equipment. The user equipment identification information indicates that the first user equipment can assist in allocating sidelink resources for the user equipment. Information regarding the transport resource pool indicates that the first user equipment can assist in allocating sidelink resources within the transport resource pool. The scheduling request configuration set information is used to configure scheduling request resources for the second user equipment. A destination identifier, which indicates that the first user equipment can use the destination identifier to assist in allocating sidelink resources for the sidelink transmission of the second user equipment. Quality of Service (QoS) information indicates that the first user equipment (UE) can utilize the QoS information to assist in allocating sidelink resources for the sidelink transmission of the second UE. The transmission type indicates that the first user equipment is capable of assisting in allocating sidelink resources for the second user equipment's sidelink transmissions in that transmission type, and A list of sidelink radio bearers or logical channels indicating that the first user equipment is capable of assisting in allocating sidelink resources for the sidelink radio bearers or logical channels of the second user equipment.

8. The method according to claim 3, wherein, The first configuration message includes at least one of the following: Indication regarding whether the radio access network node supports a mode in which user equipment assists in allocating sidelink resources for other user equipment. A first channel quality threshold indicates that the first user equipment (UE) can act as the anchor UE only if the channel quality between the first UE and the cell serving the first UE is higher than or equal to the first channel quality threshold. A second channel quality threshold indicates that the first user equipment (UE) can act as the anchor UE to assist in allocating sidelink resources to the second UE only if the channel quality between the first UE and the second UE is higher than or equal to the second channel quality threshold. A geographic distance threshold indicates that the first user equipment can act as the anchor user equipment to assist in allocating sidelink resources to the second user equipment only when the geographic distance between the first user equipment and the second user equipment is less than or equal to the geographic distance threshold. A regional difference threshold indicates that the first user equipment (UE) can act as the anchor UE to assist in allocating sidelink resources to the second UE only if the regional difference between the first UE and the second UE is less than or equal to the regional difference threshold. An indication of whether the first user equipment and the second user equipment are served in the same cell. An indication of whether the first user equipment and the second user equipment are located in the same area. An indication of whether the first user equipment and the second user equipment belong to the same side of the cross-link communication group. The first user equipment can only act as an indicator of an anchor user equipment when it acts as a relay user equipment or a roadside unit user equipment. The first user equipment can only assist in indicating the allocation of sidelink resources to user equipment that has already established a unicast or multicast connection with the first user equipment.

9. The method according to claim 2, wherein, The first configuration message instructs the first user equipment to act as an anchor user equipment.

10. The method according to claim 9, wherein, The first configuration message also indicates that the first user equipment can assist in allocating sidelink resources to multiple user equipments, and for each of the multiple user equipments, the first configuration message further includes at least one of the following: The identifier of the user equipment. An identifier index, which indicates the user equipment index in the set of user equipment reported by the first user equipment to the radio access network node. The transmission type indicates that the first user equipment is capable of assisting in allocating sidelink resources for sidelink transmissions of the user equipment in the transmission type, wherein the transmission type includes at least one of unicast, multicast, and broadcast. A destination identifier or destination identifier index, which indicates that the first user equipment can utilize the destination identifier or destination identifier index to assist in allocating sidelink resources for the user equipment's sidelink transmissions. The sidelink service quality information indicates that the first user equipment can utilize the sidelink service quality information to assist in allocating sidelink resources for the user equipment's sidelink transmission.

11. The method according to claim 9, wherein, The first configuration message also indicates a plurality of source identifiers or destination identifiers, each of which identifies one or more user equipments for which the first user equipment can assist in allocating sidelink resources, and for each of the plurality of source identifiers or destination identifiers, the first configuration message further includes at least one of the following: Source identifier or destination identifier, A destination identifier index, which indicates the index of the destination identifier in the set of destination identifiers reported by the first user equipment to the radio access network node. A transmission type, indicating that the first user equipment is capable of assisting in allocating sidelink resources for sidelink transmissions of the user equipment identified by the source identifier or destination identifier in the transmission type, wherein the transmission type includes at least one of unicast, multicast, and broadcast. Sidelink quality of service information, which indicates that the first user equipment can utilize the sidelink quality of service information to assist in allocating sidelink resources for sidelink transmissions of the user equipment identified by the source identifier or destination identifier.

12. The method according to claim 2, further comprising: In response to the failure to receive information about the transmission resource pool for sidelink communication from the radio access network node via system messages and the first user equipment being in an idle state, it is determined not to act as the anchor user equipment, or to enter a radio resource control connection state to act as the anchor user equipment.

13. The method according to claim 1, further comprising: Transmit scheduling request configuration information to the second user equipment; as well as Transmitting the resource allocation message includes: In response to receiving a scheduling request for sidelink transmission from the second user equipment, the resource allocation message is transmitted to the second user equipment.

14. The method according to claim 1, further comprising: Transmit buffer status report configuration information to the second user equipment; as well as Transmitting the resource allocation message includes: In response to receiving a buffer status report from the second user equipment, the resource allocation message is transmitted to the second user equipment.

15. The method according to claim 2, further comprising: Before receiving the first configuration message from the radio access network node, first auxiliary information is transmitted to the radio access network node, the first auxiliary information including at least one of the following: The first user equipment has an indication that it has the ability to act as an anchor user equipment to assist in allocating sidelink resources for other user equipment. Instructions on whether the first user equipment is interested in assisting with the allocation of sidelink resources for other user equipment. The first user equipment is an indication of the group header of the multicast communication group, and An indication of the set of member information for individual user equipment in a sidelink communication group.

16. The method according to claim 15, wherein, Membership information for user equipment in a sidelink communication group includes at least one of the following: The identifier of the user equipment. The auxiliary information of the user equipment includes at least one of the following: traffic cycle, timing offset, message size, sidelink destination index, and sidelink quality of service flow identifier. The user equipment's sidelink information includes at least one of the following: a list of frequencies of interest, a destination identifier, a transmission type, and a list of sidelink quality of service information. The power-saving information of the user equipment. Indication regarding whether the user equipment supports a mode in which the user equipment assists in allocating sidelink resources for other user equipment, and Indicator of whether resources scheduled via user equipment are supported.

17. The method according to claim 1, further comprising: Before transmitting the resource allocation message to the second user equipment, auxiliary information about the second user equipment is received from the second user equipment, wherein the auxiliary information includes at least one of the following: the second user equipment's traffic cycle, timing offset, message size, sidelink destination identifier or identifier index, frequency of interest, transmission type, sidelink quality of service flow identifier, and power saving information.

18. The method according to claim 1, wherein, The resource allocation message includes at least one of the following: Whether the allocated sidelink resources can only be used to carry indications of sidelink traffic to the first user equipment. A destination identifier or destination identifier index that indicates that sidelink traffic from a second user equipment utilizing the destination identifier or destination identifier index can use the allocated sidelink resources. The transmission type indicates that the sidelink traffic of the second user equipment utilizing the transmission type can use the allocated sidelink resources, and Sidelink service quality indicates that the sidelink traffic of a second user equipment utilizing the sidelink service quality can use the allocated sidelink resources.

19. A method performed by a second user equipment in a vehicle-to-everything (V2X) communication, comprising: Obtain a second configuration message regarding the allocation of sidelink resources for sidelink transmission between user equipments, wherein the second configuration message includes conditions that allow a user equipment to obtain the satisfaction of sidelink resource allocation via an anchor user equipment, the anchor user equipment representing a user equipment type that assists in allocating sidelink resources for other user equipments; In response to the second user equipment satisfying the condition in the second configuration message, it is determined that side link resource allocation is obtained via the anchor user equipment; as well as The anchor user equipment receives a resource allocation message regarding the allocation of sidelink resources for the second user equipment, wherein receiving the resource allocation message includes: receiving a resource allocation message from the first user equipment including resource allocation assistance information to select sidelink resources for performing sidelink transmission based on the resource allocation assistance information, wherein the resource allocation assistance information is obtained based on the anchor user equipment knowing the sidelink transmission resource pool of the second user equipment, and the resource allocation assistance information indicates a list of available sidelink resources or a list of unavailable sidelink resources.

20. The method according to claim 19, wherein obtaining the second configuration message includes: Receive the second configuration message from the wireless access network node; or Obtain the second configuration message pre-configured in the second user equipment.

21. The method of claim 20, further comprising: Receive a sidelink message from the first user equipment, the sidelink message indicating that the first user equipment acts as the anchor user equipment; In response to receiving the sidelink message, a request message is transmitted to the first user equipment, the request message requesting assistance in allocating sidelink resources for the second user equipment; as well as A response message is received from the first user equipment, the response message indicating whether to assist in allocating sidelink resources for the second user equipment.

22. The method of claim 21, wherein the request message further comprises at least one of the following: The identifier of the second user equipment, Power saving information for the second user equipment The sidelink destination index or destination identifier that the second user equipment will use in sidelink transmission. The sidelink source index or source identifier that the second user equipment will use in sidelink transmission. The quality of service (QoS) of the sidelink that the second user equipment will use in sidelink transmission. Coverage status information, which indicates whether the second user equipment is within or outside the coverage area of ​​the radio access network node. Serving cell identifier, which indicates the cell serving the second user equipment. The list of frequency information to be used by the second user equipment in sidelink transmission, and The sidelink transmission type that the second user equipment will use in sidelink transmission.

23. The method of claim 21, wherein the request message further includes information about the transmission resource pool of the second user equipment.

24. The method according to claim 21, wherein, The second configuration message includes: Indication regarding whether the radio access network node supports the mode of user equipment assisting in the allocation of sidelink resources. A first channel quality threshold indicates that the second user equipment (UE) can only obtain sidelink resource allocation via the anchor UE if the channel quality between the UE and the cell serving the UE is lower than or equal to the first channel quality threshold. The second channel quality threshold indicates that the second user equipment can only obtain sidelink resource allocation through the first user equipment if the channel quality between the first user equipment and the second user equipment is higher than or equal to the second channel quality threshold. A geographical distance threshold indicates that the second user equipment can only obtain sidelink resource allocation via the first user equipment if the geographical distance between the first user equipment and the second user equipment is less than or equal to the geographical distance threshold. The regional difference threshold indicates that the second user equipment can only obtain sidelink resource allocation via the first user equipment if the regional difference between the first user equipment and the second user equipment is less than or equal to the regional difference threshold. An indication of whether the first user equipment and the second user equipment are served in the same cell. An indication of whether the first user equipment and the second user equipment are located in the same area, and An indication of whether the first user equipment and the second user equipment belong to the same side of the cross-link communication group.

25. The method of claim 20, further comprising: Receive scheduling request configuration information from the first user equipment; In response to the need for side link transmission, a scheduling request for the side link transmission is generated based on the scheduling request configuration information; as well as The scheduling request is transmitted to the first user equipment.

26. The method of claim 20, wherein, The second configuration message instructs the second user equipment to obtain sidelink resource allocation via the anchor user equipment.

27. The method according to claim 26, wherein, The second configuration message also indicates that multiple user equipments acting as the anchor user equipment can assist in allocating sidelink resources for the second user equipment, and for each of the multiple user equipments, the second configuration message includes at least one of the following: The identifier of the user equipment. An identifier index, which indicates the index of a user equipment in the set of user equipment reported by the second user equipment to the radio access network node. A transmission type, indicating that the user equipment is capable of allocating sidelink resources for the second user equipment's sidelink transmissions in that transmission type, wherein the transmission type includes at least one of unicast, multicast, and broadcast. A destination index, which indicates that the user equipment can utilize the destination index to assist in allocating sidelink resources for the sidelink transmission of the second user equipment, and Sidelink service quality information, which indicates that the user equipment can use the sidelink service quality information to assist in allocating sidelink resources for the sidelink transmission of the second user equipment.

28. The method according to claim 26, wherein, The second configuration message also indicates a plurality of source identifiers or destination identifiers, each of which identifies one or more user equipments acting as anchor user equipment that can assist in allocating sidelink resources for the second user equipment, and for each of the plurality of source identifiers or destination identifiers, the second configuration message includes at least one of the following: Source identifier or destination identifier, An identifier index, which indicates the index of a source identifier or destination identifier in the set of source identifiers or destination identifiers reported by the second user equipment to the radio access network node. A transmission type indicating that the user equipment identified by the source identifier or destination identifier is capable of assisting in allocating sidelink resources for the second user equipment's sidelink transmissions in the transmission type, wherein the transmission type includes at least one of unicast, multicast, and broadcast. Sidelink quality of service information, which indicates that the user equipment identified by the source identifier or destination identifier can use the sidelink quality of service information to assist in allocating sidelink resources for the sidelink transmission of the second user equipment.

29. The method of claim 20, further comprising: Before receiving the second configuration message from the radio access network node, second auxiliary information is transmitted to the radio access network node, the second auxiliary information including at least one of the following: The second user equipment has an indication of its ability to obtain sidelink resource allocation via the anchor user equipment. Whether the second user equipment will receive instructions on sidelink resource allocation via the anchor user equipment. The second user equipment is an indication of the membership of the side link multicast communication group. The second user equipment is the identifier of its member's sidelink multicast communication group. The second user equipment is an indication of the set of member information of individual user equipment in the side-link communication group of its members. The second user equipment is an indication of the group header of its member's side-link communication group. The power saving requirements of the second user equipment, and The candidate user equipment set acts as anchor user equipment to assist in the allocation of sidelink resources for the second user equipment.

30. The method according to claim 29, wherein, For each of the candidate user equipment sets, the indication information of the candidate user equipment set includes at least one of the following: Identifiers of candidate user equipment The source identifier or destination identifier of the candidate user equipment. An indication of whether the candidate user equipment supports a mode in which user equipment assists in allocating sidelink resources for other user equipment. The channel quality information between the candidate user equipment and the second user equipment. The channel quality information between the candidate user equipment and the cell serving the candidate user equipment. The current load rate of the candidate user equipment. The channel busy rate of the transmission resource pool of the candidate user equipment. The resource utilization rate of the resources to be allocated to the candidate user equipment. The amount of resources to be allocated to the candidate user equipment. The candidate user equipment is acting as an anchor user equipment to assist in allocating sidelink resources to the number of user equipments, and The geographic location identifier of the candidate user equipment.

31. The method of claim 20, further comprising: Receive sidelink messages from multiple user equipments instructing the multiple user equipments to act as anchor user equipments; Based on the sidelink messages, candidate user equipment that meets predetermined conditions is selected from the plurality of user equipments; and In response to at least one of the following, one of the candidate user equipment is selected as the first user equipment: The candidate user equipment is the group header of the side link communication group. The candidate user equipment has optimal channel quality between the candidate user equipment and the cell serving the candidate user equipment, or between the candidate user equipment and the second user equipment. The candidate user equipment and the second user equipment belong to the same side of the link communication group. The candidate user equipment and the second user equipment are served in the same cell. The resource allocation mode for the candidate user equipment is the radio access network node scheduling mode. The candidate user equipment has the most allocatable resources. The candidate user equipment has the lowest resource utilization rate relative to the resources to be allocated to it. The candidate user equipment's transmission resource pool has the lowest channel busy rate. The candidate user equipment supports roadside unit functionality, and The candidate user equipment supports relay functionality.

32. The method according to claim 31, wherein, The predetermined conditions include at least one of the following: The user's device load rate is lower than the load rate threshold. The user equipment is assisting in allocating sidelink resources to the number of user equipments. The channel quality of the user equipment is higher than the channel quality threshold. The quality of service range supported by the user equipment includes the quality of service for the sidelink data to be transmitted by the second user equipment. The availability of resources allocated by the user equipment is greater than the resource availability threshold. The resource utilization rate of the resources to be allocated to the user equipment is lower than the resource utilization rate threshold. The channel busy rate of the transmission resource pool of the user equipment is lower than the channel busy rate threshold. The sidelink group communication destination identifier list includes the sidelink group communication destination identifiers for the sidelink data to be transmitted by the second user equipment. The user equipment and the second user equipment belong to the same side of the cross-link communication group. The geographical distance between the user equipment and the second user equipment is less than a geographical distance threshold, and The user equipment and the second user equipment are served in the same cell.

33. A wireless communication device, comprising a processor and a memory, wherein the processor is configured to read computer code from the memory to implement the method according to any one of claims 1 to 32.

34. A computer-readable medium comprising instructions that, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 32.

Images