TW202025801A - Method and apparatus of new radio v2x cluster management - Google Patents

Abstract

Various examples and schemes pertaining to New Radio (NR) vehicle-to-everything (V2X) cluster management are described. An apparatus, implemented in a user equipment (UE) of a V2X cluster in an NR V2X communication environment, receives a scheduling request from a member of the V2X cluster. The apparatus transmits a resource grant to the member to allocate a resource of one or more resources to the member responsive to the receiving of the scheduling request. The one or more resources are either: (a) preconfigured by a wireless network, or (b) granted by the wireless network responsive to the UE transmitting a resource request to the wireless network upon receiving the scheduling request.

Description

New radio vehicle networking cluster management method and device

The present disclosure generally relates to mobile communications, and more specifically, to the technology of vehicle to everything (V2X) cluster management by New Radio (New Radio).

Unless otherwise indicated herein, the methods described in this section are not prior art to the scope of patent applications listed below, and are not recognized as prior art by being included in this section.

Under the 3rd Generation Partnership Project (The 3rd Generation Partnership Project, 3GPP) specifications, vehicle platooning (vehicle platooning) can support specific user equipment (UE) (which supports V2X applications) and up to 19 support V2X applications Reliable vehicle-to-vehicle (V2V) communication between other UEs. In addition, under the 3GPP specification, in the NR side link (Sidelink), multiple UEs can be grouped into a cluster, and the cluster head (also called "Scheduler UE") in the cluster is the cluster Schedule time-frequency resources for other UEs. The scheduling performed by the cluster head is a centralized scheduling solution. Compared with distributed scheduling, centralized scheduling is more reliable and more suitable for traffic congestion. For centralized scheduling, the cluster head can sense its local environment, and accordingly, schedule available resources faster than base stations (such as gNB). Currently, some details about V2X cluster management are still to be defined, including: cluster architecture, resource scheduling, scheduler UE selection, member check-in and check-out The process, the cluster head is switched to a member, the member is switched to another cluster, how to deal with the disappearance of the scheduler UE (disappearance) and cluster dissolution (dissolution).

The following summary is only illustrative and not intended to be limiting in any way. That is, the following inventive content is provided to introduce the concepts, highlights, benefits, and advantages of the novel and non-obvious technologies described herein. The selected implementation is further described in the detailed description below. Therefore, the following summary is not intended to identify the essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter.

This disclosure aims to propose concepts, solutions, technologies, designs, methods and devices related to NR V2X cluster management. Specifically, the purpose of this disclosure is to propose the cluster architecture, resource scheduling, scheduler UE selection, member check-in and check-out process, cluster head switch to member, member switch to another cluster, and how to handle scheduling The disappearance of the device UE and the dissolution of the cluster.

In one aspect, a method may include a processor of a device implemented in a user equipment (UE) in a V2X cluster in a New Radio (NR) vehicle to everything (V2X) communication environment, from the V2X Members of the cluster receive scheduling requests. The method may further include: in response to the reception of the scheduling request, the processor sends a resource grant to the member to allocate one or more resources to the member. The one or more resources are: (a) pre-configured by the wireless network, or (b) in response to the UE sending a resource request to the wireless network after receiving the scheduling request, the Granted by the wireless network.

In one aspect, a method may include a processor of a device implemented in a user equipment (UE) detecting a scheduler UE in a new NR V2X communication environment. The method may further include in response to the detection and at least one of the following, selecting, by the processor, the scheduler UE to join the V2X cluster associated with the scheduler UE: (a) the NR V2X The channel occupancy rate in the communication environment is greater than a predetermined threshold; (b) the throughput of the UE is greater than the predetermined throughput; (c) the size of the data to be sent by the UE is greater than the predetermined size.

It is worth noting that although the description provided here can be in the context of certain radio access technologies, networks and network topologies, such as NR V2X and V2V, the proposed concepts, solutions and any variants/derivatives thereof can be In, used for, and achieved through other types of radio access technologies, networks and network topologies, such as but not limited to 5G, Long-Term Evolution (LTE), LTE-A, LTE-A Pro, and any future Development of communication/network technology. Therefore, the scope of the present disclosure is not limited to the examples described herein.

Detailed embodiments and implementations of the claimed subject matter are disclosed herein. However, it should be understood that the disclosed detailed embodiments and implementations are merely examples of the claimed subject matter in various forms. However, the present disclosure can be embodied in a variety of different forms, and should not be construed as limited to the exemplary embodiments and implementations. These exemplary embodiments and implementations are provided so that the description of the present disclosure is comprehensive and complete and can fully convey the scope of the present disclosure to those with ordinary knowledge in the art. In the following description, details of known features and technologies are omitted to avoid unnecessarily obscuring the embodiments and implementation of the present invention. Overview

The implementation of the present disclosure relates to various technologies, methods, solutions and/or solutions related to NR V2X cluster management. According to the present disclosure, many possible solutions can be implemented individually or jointly. That is, although these possible solutions can be described separately below, two or more of these possible solutions can be implemented in one combination or another combination.

Figure 1 shows an example network environment 100 in which various solutions and methods according to the present disclosure can be implemented. Fig. 2A, Fig. 2B and Fig. 3 respectively show example scenes 200A, 200B, and 300 according to the implementation of the present disclosure. Each of the scenarios 200 and 300 can be implemented in the network environment 100. The following descriptions of various proposed solutions are provided with reference to Figures 1 to 3.

Referring to Figure 1, the network environment 100 may involve a UE 110. The UE 110 acts as a scheduler through a base station or a network node 135 (for example, eNB, gNB, or transmit-receive point (TRP)) and The wireless network 130 performs wireless communication. In addition, the UE 110 may also communicate wirelessly with one or more members represented by the UE 120 in the NR V2X cluster via a sidelink interface. UE 120 may also perform wireless communication with one or more other UEs represented by UE 125, and these other UEs may or may not be members of the cluster. It is worth noting that although Figure 2 shows a given number of member UEs, in the actual implementation of the various proposed solutions of the present disclosure, the number of member UEs may be different (for example, more than one). In the network environment 100, as described below, the UE 110 and at least one of the one or more member UEs (for example, the UE 120) may implement various solutions related to NR V2X cluster management according to the present disclosure.

In NR V2X, platooning is an important use case. The platoon lead in the fleet can use unicast and/or multicast to communicate with fleet members. For reference, in LTE V2X, distributed scheduling is used for resource configuration in mode 4. Under medium and low traffic load conditions, decentralized scheduling has good performance and low conflict probability. However, when the local traffic load is high, the performance of distributed scheduling is often worse than that of centralized scheduling. Therefore, clusters can be formed when the traffic load is high, and in the clusters, the scheduler UE can help schedule resources to avoid conflicts with high probability.

Under the proposed solution for the NR V2X cluster architecture according to the present disclosure, the resource scheduling performed by the UE 110 may take any of two forms, depending on the degree of participation of the network node 135. In the first form, the UE 110 may request resources to be used for scheduling from the network node 135, and in response, the UE 110 may receive a grant of resources from the network node 135 via a Uu interface (Uu interface). ). In the second form, the UE 110 can use resources pre-configured by the network node 135 for scheduling. In either form, the UE 110 is responsible for notifying the resource configuration to the UE 120 that needs resources for transmission via a sidelink interface. In the case of partial-coverage, it can be expected that the UE 110 is within the cell coverage of the network node 135, while the UE 120 may not be within the cell coverage of the network node 135. In this case, resources can be allocated to UE 120 (and UE 125), and UE 120 (and UE 125) can use the allocated resources to perform control/data transmission through the side link interface. Under the proposed scheme, whether a given UE can act as a scheduler UE (eg, UE 110) or otherwise act as a scheduler UE (eg, UE 110) depends on its capabilities.

Referring to FIG. 2A, under the proposed solution for resource scheduling according to the present disclosure, UE 110 may send a resource request to network node 135, and then, network node 135 may grant resources for UE 110 to use . Then, the UE 120 may send a scheduling request (scheduling request) with a buffer status report (BSR) to the UE 110. In response, UE 110 may grant resources to UE 120. Therefore, the UE 120 can use the granted resources to perform control/data transmission to the UE 125.

Referring to FIG. 2B, under the proposed solution regarding resource scheduling according to the present disclosure, UE 120 may send a scheduling request with BSR to UE 110. Then, the UE 110 may send a resource request to the network node 135, and the network node 135 may grant resources for the UE 110 to use. In response, UE 110 may grant resources to UE 120. Therefore, the UE 120 can use the granted resources to perform control/data transmission to the UE 125.

Referring to FIG. 3, under another proposed solution for resource scheduling according to the present disclosure, the network node 135 may pre-configure resources for the UE 110 to use for resource scheduling. UE 120 may send a scheduling request with BSR to UE 110. In response, UE 110 may grant resources to UE 120. Therefore, the UE 120 can use the granted resources to perform control/data transmission to the UE 125.

Under the proposed scheme for selecting a scheduler UE according to the present disclosure, the UE (for example, UE 120 or UE 125) may perform one or more operations in the process of selecting the scheduler UE. For example, the UE may measure the channel occupancy ratio (channel occupancy ratio) around it in the network environment 100 to determine whether the channel occupancy ratio is greater than a predetermined threshold. Alternatively or additionally, the UE may determine whether it has high throughput or whether it needs to send large-sized packets. When the determination is a positive result (for example, the channel occupancy rate is greater than a predetermined threshold, the UE has high throughput and/or the UE needs to send large packets), the UE may detect that there is a scheduler UE.

In the case where multiple scheduler UEs are detected, the UE (for example, UE 120) can select one scheduler UE with the largest reference signal received power (RSRP) among the multiple scheduler UEs, Alternatively, the UE may randomly select one of multiple scheduler UEs. After selecting one of the multiple scheduler UEs, the UE may send a scheduling request with BSR to the selected scheduler UE (for example, UE 110) to request resources. After receiving the scheduling request, the selected scheduler UE may request resources from the network node 135. After receiving the grant from the network node 135 or having the resources pre-configured by the network node 135, the selected scheduler UE may grant resources to the requesting UE (requesting UE). Therefore, the UE (for example, UE 120) can use the granted resources to send data.

In a case where only one scheduler UE (for example, UE 110) is detected, the UE (for example, UE 120) may send a scheduling request with BSR to the scheduler UE to request resources. The scheduler UE may request resources from the network node 135 after receiving the scheduling request. After receiving the grant from the network node 135 or having resources pre-configured by the network node 135, the scheduler UE may grant resources to the requesting UE. Therefore, the UE (for example, UE 120) can use the granted resources to send data.

In the event that the scheduler UE is not detected, the UE (eg, UE 110 or UE 120) may determine whether it has sufficient capabilities to become, function as, or otherwise act as a scheduler UE. In the case that the UE is capable of acting as a scheduler UE, the UE can randomly select a cluster identity (ID). In the case that the UE is in the cellular coverage of the network node 135, the UE may send information to the network node 135 to request to become a scheduler UE. If the network node 135 grants the request, the UE can therefore be promoted to the status of the scheduler UE. In addition, when the request is granted, the network node 135 can assign a cluster ID to the new scheduler UE. Otherwise, if the network node 135 does not approve the request or the UE does not receive permission from the network node 135, the UE can continue to operate in its current transmission mode. When the UE is capable of becoming a scheduler UE but is not within the cell coverage of the network node 135, the UE may adopt the scheduler UE state and start to function as a scheduler UE. For example, the new scheduler UE can randomly select the cluster ID and broadcast the cluster ID (and any related information). In addition, this new scheduler UE can use any pre-configured resources for resource scheduling. However, in the case that the UE does not have the ability to become a scheduler UE, the UE may continue to operate in its current transmission mode.

Under the proposed solution for member UE sign-in according to the present disclosure, the cluster head (for example, UE 110) may periodically broadcast a discovery signal with cluster information to notify other UEs that there is a cluster head associated with the cluster head. Cluster. In order to join the cluster, the UE (for example, the UE 120 or the UE 125) may report the percentage (for example, X%) of the communication resources currently occupied by it to the cluster head (the cluster head of the cluster). As the scheduler UE, the cluster head can fully control the communication resources reported by its members in the cluster. After signing in, the member UE (for example, UE 120) cannot perform resource selection on the communication resources shared with the cluster, because the use of the shared communication resources is controlled and allocated by the cluster head.

Under the proposed scheme regarding member UE checkout according to the present disclosure, the UE (for example, UE 120) may send a checkout signal to notify the cluster head (for example, UE 110) that it will leave the cluster. The UE may take (for example, be allocated and then used) some communication resources before leaving the cluster. Under the proposed solution, if the UE does not send a scheduling request or cannot be contacted after a predetermined period of time, the UE can be deemed to have passively checked out. In this case, the cluster head (eg, UE 110) may assume or otherwise determine that the UE has checked out.

Under the proposed solution for switching the cluster head to a member UE according to the present disclosure, when the current scheduler UE detects that the RSRP of a certain percentage (for example, X%) of the cluster members is lower than a predetermined threshold, the current scheduler The UE (eg, UE 110) may select a cluster member (eg, UE 120) to act as the next scheduler UE. Under the proposed solution, the next scheduler UE can be selected based on one or more of the following parameters: receiving RSRP, location, moving speed, and processing capacity.

Under the proposed solution for a member UE to switch to another cluster according to the present disclosure, when a member UE (for example, UE 120) detects another cluster different from the cluster that the UE currently belongs to, the UE can decide whether to join and switch To this other cluster. The UE may decide whether to join another cluster based on information such as but not limited to RSRP, the position and speed of the cluster head of another cluster. In the case that the UE decides to join the other cluster, the UE may perform multiple operations as described below to switch to the other cluster. First, the UE can start a timer. Second, the UE can send a leave command to its current scheduler UE, and follow the checkout procedure described above to leave the current cluster. Third, the UE can send the join command to the scheduler UE of another cluster, and join the other cluster according to the above-mentioned sign-in procedure. If the UE receives permission for the leave command or satisfies one or more leave conditions, the UE may join the new cluster in response to the UE having received permission for the join command. Otherwise, in the event that the timer expires, the UE can return to its initial transmission mode. In the case that the UE decides not to join another cluster, or in the case that the UE does not receive permission for the leave command, the UE can maintain its connection with the current scheduler UE of the current cluster.

Under the proposed solution on how to handle the disappearance of the scheduler UE according to the present disclosure, in response to the member UE (for example, UE 120) having not received any signal from the scheduler UE, the member UE can set a timer and then monitor the scheduler UE.程器UE. In the case where the UE receives a signal from the scheduler UE, the UE may consider itself to be still a member of the cluster associated with the scheduler UE. Otherwise, if the UE does not receive any signal from the scheduler UE and the timer has expired, the UE can leave the cluster. In the case that the UE does not receive any signal from the scheduler UE and the timer has not expired, the UE can consider itself to be a member of the cluster associated with the scheduler UE.

Under the proposed solution for cluster dissolution according to the present disclosure, after the scheduler UE determines that the cluster is to be dissolved, the scheduler UE (for example, UE 110) may send a dissolution signal to notify the member UEs of the cluster. The cluster will be disbanded. Under the proposed solution, because the scheduler UE detects that its channel busy rate is lower than a predetermined threshold, or because the scheduler UE cannot find a suitable member to act as the scheduler UE, the scheduler UE can determine to disband the cluster. Under the proposed scheme, the scheduler UE can perform the final resource configuration before disbanding. Exemplary implementation

Figure 4 shows an example communication system 400 including an example device 410 and an example device 420 according to an implementation of the present disclosure. Both the device 410 and the device 420 can perform various functions to implement the solutions, techniques, processes, and methods for NR V2X cluster management described herein, including the various solutions described above and the processes described below.

Both the device 410 and the device 420 may be a part of an electronic device, and the electronic device may be a UE such as a vehicle, a portable or mobile device, a wearable device, a wireless communication device, or a computing device. For example, both the device 410 and the device 420 can be used in an electronic control unit (ECU) of a vehicle, a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing device such as a tablet computer, a laptop computer, or a notebook computer. Implemented in equipment. Both the device 410 and the device 420 may also be part of a machine-type device, which may be an IoT or NB-IoT device such as an immobile or fixed device, a home device, a wired communication device, or a computing device. For example, both the device 410 and the device 420 can be implemented in a smart thermostat, a smart refrigerator, a smart door lock, a wireless speaker, or a home control center. Alternatively, both the device 410 and the device 420 may be implemented in the form of one or more integrated-circuit (IC) chips, such as but not limited to, one or more single-core processors, one or more multi-core processors , One or more reduced-instruction-set-computing (RISC) processors or one or more complex-instruction-set-computing (CISC) processors. Both the device 410 and the device 420 may include at least some of those elements shown in Figure 4, for example, the processor 412, the processor 422, and the like. Both the device 410 and the device 420 may include one or more other elements (for example, internal power supply, display device and/or user interface equipment) that are not related to the proposed solution of the present disclosure, and therefore, for simplicity and conciseness, the following Figure 4 does not describe these elements of the device 410 and the device 420.

In some implementations, at least one of the device 410 and the device 420 may be a part of an electronic device, such as a vehicle, a roadside unit, a network node, or a base station (e.g., eNB, gNB, or TRP). ), small cell (cell), router or gateway. For example, at least one of the device 410 and the device 420 may be in a vehicle in a V2V or V2X network, or in an eNodeB in an LTE, LTE-A, or LTE-A Pro network, or in a 5G, NR, IoT, or NB -Implemented in gNB in IoT network. Alternatively, at least one of the device 410 and the device 420 may be implemented in the form of one or more IC chips, such as but not limited to, one or more single-core processors, one or more multi-core processors, one or more RISC Processor, or one or more CISC processors.

In one aspect, each of the processor 412 and the processor 422 may be one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISC processors. The form of realization. That is, even though the singular term "processor" is used herein to refer to the processor 412 and the processor 422, each of the processor 412 and the processor 422 may include multiple processors in some implementations according to the present disclosure. And in other implementations, a single processor may be included. On the other hand, each of the processor 412 and the processor 422 may be implemented in the form of hardware (and optionally, firmware). The electronic components of the hardware include, for example, but not limited to, one or more electronic components. Crystals, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors configured and arranged to achieve a specific purpose (memristors) and / Or one or more varactor diodes. In other words, in at least some embodiments, each of the processor 412 and the processor 422 may be a dedicated device that is specifically designed, arranged, and configured to perform specific tasks (including NR) according to various embodiments of the present disclosure. V2X cluster management).

In some implementations, the device 410 may also include a transceiver 416 coupled to the processor 412 and capable of wirelessly sending and receiving data. In some implementations, the device 410 may further include a memory 414, which is coupled to the processor 412 and can access data therein by the processor 412. In some implementations, the device 420 may also include a transceiver 426 coupled to the processor 422 and capable of wirelessly sending and receiving data. In some implementations, the device 420 may further include a memory 424, which is coupled to the processor 422 and can access data therein by the processor 422. Therefore, the device 410 and the device 420 can wirelessly communicate with each other via the transceiver 416 and the transceiver 426, respectively.

In order to help better understand, the following description of the operation, function and performance of each of the device 410 and the device 420 is based on the NR V2X communication environment, where the device 410 is in a wireless communication device, a communication device, or a scheduler UE (For example, the UE 110) is implemented in or is implemented as a wireless communication device, a communication device, or a scheduler UE, and the device 420 is implemented in a member UE (for example, the UE 120) or is implemented as a member UE.

In an aspect of NR V2X cluster management according to the present disclosure, the processor 412 of the device 410 is implemented in a UE (for example, UE 110) in a V2X cluster in an NR V2X communication environment (for example, communication environment 100), and may be implemented via a transceiver 416 receives scheduling requests from members of the V2X cluster (for example, with or without BSR). In addition, the processor 412 may send a resource grant (grant) to the member via the transceiver 416 in response to receiving the scheduling request, so as to allocate one or more resources to the member. In some implementations, one or more resources may be: (a) pre-configured by the wireless network, or (b) in response to the device 410 sending a resource request to the wireless network after receiving the scheduling request, and the wireless network Road grant.

In some embodiments, the processor 412 may perform additional operations. For example, the processor 412 may broadcast a discovery signal with cluster information via the transceiver 416 as a notification of the existence of the V2X cluster. In addition, in response to the broadcast of the discovery signal, the processor 412 may receive a report of the percentage of resource occupancy used for communication from another UE via the transceiver 416. In addition, in response to receiving the report, the processor 412 may determine the other UE as a new member of the V2X cluster.

In some implementations, the processor 412 may perform additional operations. For example, the processor 412 may receive a sign-out signal from the member via the transceiver 416. In addition, the processor 412 may determine that the member is checked out from the V2X cluster in response to receiving the sign-out signal.

In some implementations, the processor 412 may perform additional operations. For example, the processor 412 may respond to at least one of the following to determine that a member has checked out from the V2X cluster: (1) The first predetermined time period has passed, and no further scheduling request has been received from the member; (2) The member cannot be connected within the second predetermined period of time.

In some implementations, the processor 412 may perform additional operations. For example, the processor 412 may detect through the transceiver 416 that the RSRP of a predetermined percentage of the members of the V2X cluster is lower than a predetermined threshold. In addition, in response to the detection, the processor 412 may select one of a plurality of members to act as the scheduler UE. In some implementations, when selecting one of the plurality of members, the processor 412 may select one of the plurality of members based on one or more of the plurality of parameters about each member of the plurality of members, wherein the plurality of parameters Including: (a) receiving RSRP level; (b) position; (c) speed; (d) processing capacity. In some implementations, the processor 412 may perform further operations. For example, in response to a predetermined period of time that has not found a suitable V2X cluster member to act as the scheduler UE, the processor 412 may send a disband signal via the transceiver 416 to notify each member of the V2X cluster that the V2X cluster is to be disbanded . Moreover, the processor 412 may optionally perform another resource configuration on one or more members of the plurality of members before disbanding.

In some implementations, the processor 412 may perform additional operations. For example, the processor 412 may detect that a predetermined condition exists via the transceiver 416. Moreover, the processor 412 may send a disband signal via the transceiver 416 in response to the detection to notify each member of the V2X cluster that the V2X cluster is to be disbanded. In addition, the processor 412 may optionally perform another resource configuration on one or more members of the multiple members of the V2X cluster before disbanding. In some implementations, the predetermined condition may include at least one of the following: (1) the channel busy rate of the device 410 is lower than a predetermined threshold; and (2) passing through without finding a suitable V2X cluster member to act as the scheduler UE The scheduled time.

In some implementations, before receiving the scheduling request and sending the resource grant, the processor 412 may determine that the apparatus 410 has the ability to act as a scheduler UE. In some implementations, in response to determining that the apparatus 410 has the ability to act as a scheduler UE, the processor 412 may perform additional operations. For example, the processor 412 may send a request to a network node of the wireless network via the transceiver 416 to request to be used as a scheduler UE. In addition, the processor 412 may obtain the cluster ID of the V2X cluster associated with the scheduler UE in any of the following ways: (a) selecting the first ID to be used as the cluster ID of the V2X cluster; (b) via the transceiver 416 A message permitting the request is received from the network node, the message indicating the second ID used as the cluster ID of the V2X cluster.

In an aspect of NR V2X cluster management according to the present disclosure, the processor 422 of the device 420 implemented in the UE (for example, the UE 120) may measure the channel occupancy rate in the NR V2X communication environment via the transceiver 426. In addition, the processor 422 may select a scheduler UE to join the V2X cluster associated with the scheduler UE based on the measurement result or one or more other factors. In some embodiments, when selecting a scheduler UE to join the V2X cluster associated with the scheduler UE based on a measurement result or one or more other factors, the processor 422 may select in response to at least one of the following Scheduler UE: (1) the measured channel occupancy rate is greater than a predetermined threshold; (2) the throughput of the device 420 has a throughput greater than the predetermined throughput; (3) the data to be sent by the device 420 (for example, one or The data size of multiple packets) is greater than the predetermined size. Alternatively, the processor 422 of the apparatus 420 implemented in the UE (for example, the UE 120) may detect the scheduler UE (for example, the apparatus 410) via the transceiver 426 in the NR V2X communication environment. In addition, the processor 422 may respond to detection and at least one of the following: (1) the channel occupancy rate in the NR V2X communication environment is greater than a predetermined threshold; (2) the throughput of the device 420 has a throughput greater than the predetermined throughput; and ( 3) The data size of the data to be sent of the device 420 is greater than the predetermined size, and the scheduler UE is selected to join the V2X cluster associated with the scheduler UE.

In some implementations, when the scheduler UE is selected, the processor 422 may perform certain operations. For example, the processor 422 may measure the respective RSRP of each scheduler UE among the plurality of scheduler UEs. In addition, the processor 422 may select the scheduler UE by performing any of the following operations: (a) Select the scheduler UE among the plurality of scheduler UEs that has the largest RSRP compared to other scheduler UEs among the plurality of scheduler UEs. One scheduler UE serves as the scheduler UE; or (b) randomly selects one scheduler UE among multiple scheduler UEs as the scheduler UE.

In some implementations, the processor 422 may perform additional operations. For example, the processor 422 may send a scheduling request with BSR to the scheduler UE via the transceiver 426. In addition, the processor 422 may receive the resource grant from the scheduler UE via the transceiver 426, and the scheduler UE allocates resources of one or more resources to the device 420 in response to the sent scheduling request. In addition, the processor 422 may use the allocated resources to send data via the transceiver 426.

In some implementations, the processor 422 may perform additional operations. For example, the processor 422 may determine that the device 420 has the ability to act as a new scheduler UE. In some implementations, the processor 422 may perform certain operations when the device 420 is in the cellular coverage of a network node of the wireless network. For example, the processor 422 may send a request to the network node via the transceiver 426 to request the UE as a new scheduler. In the case of a network node permission request, the processor 422 may receive a message from the network node through the transceiver 426, the message indicating that the request is permitted, and obtain the cluster of the V2X cluster associated with the scheduler UE by any of the following methods Identification (ID): (a) select the first ID as the cluster ID of the V2X cluster; or (b) receive a message from the network node that permits the request, which indicates the second ID used as the cluster ID of the V2X cluster . In the case that the network node does not approve the request or does not receive permission from the network node, the processor 422 can maintain the current transmission mode.

In some implementations, the processor 422 may perform additional operations when the device 420 is not within the cellular coverage of a network node of the wireless network. For example, the processor 422 may broadcast a discovery signal with cluster information via the transceiver 426 as a notification of the existence of a new V2X cluster. In addition, the processor 422 can allocate resources for members of the new V2X cluster.

In some implementations, the processor 422 may perform additional operations. For example, the processor 422 may detect another scheduler UE of another V2X cluster via the transceiver 426. In addition, the processor 422 may determine whether to join the other V2X cluster in response to the detection. In addition, the processor 422 may perform a switching process through the transceiver 426 to join the other V2X cluster in response to determining to join another V2X cluster. In some implementations, the handover process may involve the processor 422 to perform certain operations. The operations include: (a) starting a timer; (b) sending a leave signal to the scheduler UE to notify the scheduler UE about slave V2X cluster (C) Send a join signal to another scheduler UE to join the other V2X cluster; (d) In response to the permission for the departure received from the scheduler UE, perform any of the following operations: ( i) In the case of receiving permission to join another V2X cluster from another scheduler UE before the timer expires, join another V2X cluster, or (ii) if there is no transfer from another scheduler before the timer expires When the scheduler UE receives permission to join another V2X cluster, it returns to the initial transmission mode; or (e) in response to not receiving permission for leaving from the scheduler UE, maintains the connection with the scheduler UE.

In some implementations, the processor 422 may perform additional operations. For example, the processor 422 may start a timer. In addition, the processor 422 may determine whether any signal is received from the scheduler UE before the timer expires. In addition, the processor 422 may perform one of the following operations: (a) in the event that at least one signal is received from the scheduler UE before the timer expires, determining that the device 420 is still a member of the V2X cluster; and (b) If no signal is received from the scheduler UE before the timer expires, it is determined that the device 420 is no longer a member of the V2X cluster; (c) if no signal is received from the scheduler UE before the timer expires , It is determined that the device 420 is still a member of the V2X cluster. Exemplary process

Figure 5 shows an example process 500 according to an implementation of the present disclosure. The process 500 may be an example implementation of the above-mentioned proposed solution regarding NR V2X cluster management according to the present disclosure. The process 500 may represent the implementation of multiple features of the apparatus 410 and the apparatus 420. Process 500 may include one or more operations, actions, or functions as shown in one or more of blocks 510 and 520. Although shown as discrete blocks, depending on the desired implementation, the various blocks of process 500 may be divided into additional blocks, combined into fewer blocks, or eliminated. In addition, the blocks of process 500 may be executed in the order shown in Figure 5, or may be executed in a different order. The process 500 may be implemented by the apparatus 410, the apparatus 420, or any suitable wireless communication equipment, UE, roadside unit, base station, or machine type equipment. For illustrative purposes only and not limitation, the process 500 is described below with the device 410 as the scheduler UE (for example, UE 110) and the device 420 as the member UE (for example, UE 120) in the network environment 100 as a background. The process 500 starts at block 510.

At 510, the process 500 may involve the processor 412 of the device 410 implemented in the UE (eg, UE 110) of the V2X cluster in the NR V2X communication environment (eg, communication environment 100), receiving via the transceiver 416 from the V2X cluster member Schedule requests (for example, with or without BSR). The process 500 may proceed from 510 to 520.

At 520, the process 500 may involve the processor 412 in response to receiving the scheduling request, sending a resource grant to the member via the transceiver 416 to allocate one or more resources to the member. In some implementations, one or more resources may be: (a) pre-configured by the wireless network, or (b) in response to the device 410 sending a resource request to the wireless network after receiving the scheduling request, and the wireless network Granted by the road.

In some implementations, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 broadcasting a discovery signal with cluster information via the transceiver 416 as a notification of the existence of the V2X cluster. In addition, the process 500 may involve the processor 412 in response to the broadcast of the discovery signal receiving a report of the percentage of resources occupied by the current communication from another UE via the transceiver 416. In addition, the process 500 may involve the processor 412 in response to receiving the report to determine that another UE is a new member of the V2X cluster.

In some implementations, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 receiving a sign-out signal from a member via the transceiver 416. Additionally, the process 500 may involve the processor 412 in response to receiving the sign-out signal, determining that the member is to be checked out from the V2X cluster.

In some implementations, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 in response to at least one of the following to determine that a member has checked out from the V2X cluster: (1) The first predetermined period of time has passed, and no further scheduling request has been received from the member; (2) The member cannot be contacted within the second predetermined period of time.

In some implementations, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 via the transceiver 416 detecting that the RSRP of a predetermined percentage of the members of the V2X cluster is below a predetermined threshold. Furthermore, the process 500 may involve in response to the detection, the processor 412 selecting one of a plurality of members to act as a scheduler UE. In some implementations, when selecting one of the plurality of members, the process 500 may involve the processor 412 selecting one of the plurality of members based on one or more of the plurality of parameters regarding each member of the plurality of members, where Multiple parameters include: (a) the level of RSRP received; (b) position; (c) speed; (d) processing capacity. In some implementations, the process 500 may involve the processor 412 to perform further operations. For example, the process 500 may involve responding that a predetermined period of time has passed but no suitable V2X cluster member is found to act as the scheduler UE, the processor 412 sends a disband signal via the transceiver 416 to notify each member of the V2X cluster of the V2X cluster. To be dissolved. Moreover, the process 500 may involve the processor 412 optionally performing another resource configuration on one or more of the plurality of members before disbanding.

In some implementations, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 via the transceiver 416 detecting that a predetermined condition exists. Moreover, the process 500 may involve the processor 412 in response to the detection, sending a disband signal via the transceiver 416 to notify each member of the V2X cluster that the V2X cluster is to be disbanded. In addition, the process 500 may involve the processor 412 optionally performing another resource configuration on one or more of the members of the V2X cluster before disbanding. In some implementations, the predetermined condition may include at least one of the following: (1) the channel busy rate of the device 410 is lower than a predetermined threshold; and (2) passing through without finding a suitable V2X cluster member to act as the scheduler UE The scheduled time.

In some implementations, before receiving a scheduling request and sending a resource grant, the process 500 may involve the processor 412 determining that the apparatus 410 has the ability to act as a scheduler UE. In some implementations, in response to determining that the apparatus 410 has the capability to act as a scheduler UE, the process 500 may involve the processor 412 to perform additional operations. For example, the process 500 may involve the processor 412 sending a request to a network node of the wireless network via the transceiver 416 to request to act as a scheduler UE. In addition, the process 500 may involve the processor 412 obtaining the cluster ID of the V2X cluster associated with the scheduler UE in any of the following ways: (a) selecting the first ID to be used as the cluster ID of the V2X cluster; (b) via The transceiver 416 receives a message permitting the request from the network node, the message indicating the second ID used as the cluster ID of the V2X cluster.

Figure 6 shows an example process 600 according to an implementation of the present disclosure. The process 600 may be an example implementation of the above-mentioned proposed solution regarding NR V2X cluster management according to the present disclosure. The process 600 may represent the implementation of multiple features of the apparatus 410 and the apparatus 420. Process 600 may include one or more operations, actions, or functions as shown in one or more of blocks 610 and 620. Although shown as discrete blocks, depending on the desired implementation, the various blocks of process 600 may be divided into additional blocks, combined into fewer blocks, or eliminated. In addition, the blocks of process 600 may be executed in the order shown in Figure 5, or may be executed in a different order. The process 600 may be implemented by the apparatus 410, the apparatus 420, or any suitable wireless communication equipment, UE, roadside unit, base station, or machine type equipment. For illustrative purposes only and not limitation, the process 600 is described below with the device 410 as the scheduler UE (for example, UE 110) and the device 420 as the member UE (for example, UE 120) in the network environment 100 as a background. The process 600 starts at block 610.

At 610, the process 600 may involve the processor 422 of the device 420 implemented in the UE (eg, the UE 120) to detect the scheduler UE (eg, the device 410) in the NR V2X communication environment through the transceiver 426. The process 600 may proceed from 610 to 620.

At 620, the process 600 may involve the processor 422 selecting a scheduler UE to join the V2X cluster associated with the scheduler UE. In some implementations, when selecting a scheduler UE to join the V2X cluster associated with the scheduler UE, the process 600 may involve the processor 422 selecting the scheduler UE in response to detection and at least one of the following:( 1) The channel occupancy rate in the NR V2X communication environment is greater than a predetermined threshold; (2) the throughput of the device 420 is greater than the predetermined throughput; (3) the data size of the data to be sent of the device 420 is greater than the predetermined size.

In some implementations, the process 600 may involve the processor 422 to perform certain operations when selecting the scheduler UE. For example, the process 600 may involve the processor 422 measuring the respective RSRP of each of the plurality of scheduler UEs. In addition, the process 600 may involve the processor 422 selecting the scheduler UE by performing any of the following operations: (a) Selecting a plurality of scheduler UEs compared with other scheduler UEs among the plurality of scheduler UEs One scheduler UE with the largest RSRP is used as the scheduler UE; or (b) one scheduler UE among multiple scheduler UEs is randomly selected as the scheduler UE.

In some implementations, the process 600 may involve the processor 422 to perform additional operations. For example, the process 600 may involve the processor 422 sending a scheduling request with BSR to the scheduler UE via the transceiver 426. In addition, the process 600 may involve the processor 422 receiving a resource grant from the scheduler UE via the transceiver 426, and the scheduler UE allocates one or more resources to the device 420 in response to the sent scheduling request. . Additionally, the process 600 may involve the processor 422 using the allocated resources to send data via the transceiver 426.

In some implementations, the process 600 may involve the processor 422 to perform additional operations. For example, the process 600 may involve the processor 422 determining that the device 420 has the ability to act as a new scheduler UE. In some implementations, when the device 420 is in the cellular coverage of a network node of a wireless network, the process 600 may involve the processor 422 to perform certain operations. For example, the process 600 may involve the processor 422 sending a request to the network node via the transceiver 426 to request the UE as a new scheduler. In the case of a network node permission request, the process 600 may involve the processor 422 receiving a message from the network node through the transceiver 426 indicating that the request is permitted and obtaining the V2X associated with the scheduler UE by any of the following methods The cluster identifier (ID) of the cluster: (a) Select the first ID as the cluster ID of the V2X cluster; or (b) receive a message from the network node that permits the request, which indicates the cluster ID used as the V2X cluster The second ID. In the event that the network node does not approve the request or has not received permission from the network node, the process 600 may involve the processor 422 maintaining the current transmission mode.

In some implementations, where the device 420 is not within the cellular coverage of a network node of the wireless network, the process 600 may involve the processor 422 to perform additional operations. For example, the process 600 may involve the processor 422 broadcasting a discovery signal with cluster information via the transceiver 426 as a notification of the existence of a new V2X cluster. Additionally, the process 600 may involve the processor 422 configuring resources for members of the new V2X cluster.

In some implementations, the process 600 may involve the processor 422 to perform additional operations. For example, the process 600 may involve the processor 422 via the transceiver 426 to detect another scheduler UE of another V2X cluster. In addition, the process 600 may involve the processor 422 in response to the detection to determine whether to join the other V2X cluster. In addition, the process 600 may involve the processor 422 in response to determining to join another V2X cluster, performing a switching process via the transceiver 426 to join the other V2X cluster. In some implementations, the handover process may involve the processor 422 to perform certain operations. The operations include: (a) starting a timer; (b) sending a leave signal to the scheduler UE to notify the scheduler UE about slave V2X cluster (C) Send a join signal to another scheduler UE to join the other V2X cluster; (d) In response to the permission for the departure received from the scheduler UE, perform any of the following operations: ( i) In the case of receiving permission to join another V2X cluster from another scheduler UE before the timer expires, join another V2X cluster, or (ii) if there is no transfer from another scheduler before the timer expires When the scheduler UE receives permission to join another V2X cluster, it returns to the initial transmission mode; or (e) in response to not receiving permission for leaving from the scheduler UE, maintains the connection with the scheduler UE.

In some implementations, the process 600 may involve the processor 422 to perform additional operations. For example, the process 600 may involve the processor 422 starting a timer. Additionally, the process 600 may involve the processor 422 determining whether any signals are received from the scheduler UE before the timer expires. In addition, the process 600 may involve the processor 422 performing one of the following operations: (a) in the event that at least one signal is received from the scheduler UE before the timer expires, determining that the device 420 is still a member of the V2X cluster; and ( b) In the event that no signal is received from the scheduler UE before the timer expires, it is determined that the device 420 is no longer a member of the V2X cluster; (c) no signal is received from the scheduler UE before the timer expires In the case of, it is determined that the device 420 is still a member of the V2X cluster. Supplement

The subject matter described herein sometimes exemplifies different components contained within or connected to different other components. It is understood that these depicted architectures are only examples, and many other architectures that achieve the same function can actually be implemented. In a conceptual sense, any arrangement of components that achieve the same function is effectively "associated" so that the desired function is achieved. Therefore, independent of the architecture or intermediate components, any two components combined to achieve a specific function herein can be regarded as being "associated" with each other so that the desired function can be achieved. Similarly, any two components so associated can also be regarded as being "operably connected" or "operably coupled" to each other to achieve the desired function, and any two components that can be so associated can also be regarded as each other "Operately coupleable" to achieve the desired function. Specific examples of operations that can be coupled include, but are not limited to, physically compatible and/or physically interactive components and/or wirelessly interactive and/or wirelessly interactive components and/or logically interactive and/or logical On the interactive components.

In addition, with regard to the extensive use of any plural and/or singular terms herein, those with ordinary knowledge in the art can convert from the plural to the singular and/or from the singular to the plural according to the context and/or application needs. For the sake of clarity, various singular/plural reciprocities can be clearly stated in this article.

In addition, those with ordinary knowledge in the art will understand that, generally, the terms used herein, and especially the terms used in the scope of the appended patent application (for example, the subject of the scope of the appended patent application) usually mean "open" terms, For example, the term "comprising" should be interpreted as "including but not limited to", the term "having" should be interpreted as "at least having", the term "including" should be interpreted as "including but not limited to", and so on. Those with ordinary knowledge in the field will also understand that if the specific number of the cited scope of patent application is intentional, the intention will be clearly listed in the scope of patent application, and there is no such case when such a list does not exist. intention. For example, as an aid to understanding, the scope of the attached patent application may include the use of the introductory phrases "at least one" and "one or more" listed in the scope of the patent application. However, the use of this phrase should not be construed as implying that the enumeration of the scope of patent application through the introduction of the indefinite article "a" or "one" limits the scope of any particular application that includes such an enumeration of the introduced patent scope to only Include one such enumerated implementation, even when the same patent application includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (for example, "a and When/or “a” should be interpreted as meaning “at least one” or “one or more”), the same applies to the use of definite articles used to introduce the enumerated claims. In addition, even if a specific number of the introduced patent scope list is explicitly listed, those skilled in the art will recognize that this list should be interpreted as meaning at least the number listed (for example, without other modifiers) In this case, the unobstructed list of "two lists" means at least two lists or two or more lists). In addition, in those cases where a convention similar to "at least one of A, B, and C, etc." is used, in the sense that those skilled in the art will understand this convention, it usually means this interpretation (for example, "has A The system of at least one of, B and C" shall include but not limited to having A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B and C, etc.). In those cases where a convention similar to "at least one of A, B, C, etc." is used, those skilled in the art will understand this convention in the sense that it usually means such an interpretation (for example, "having A, B Or a system of at least one of C" will include but not limited to having A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A together, B and C, etc.). Those skilled in the art will also understand that, whether in the specification, the scope of the patent application or the drawings, any transition words and/or phrases that actually present two or more alternative items should be construed as contemplated to include these items The possibility of one, any of these items, or both. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."

Based on the foregoing, it will be appreciated that various implementations of the present disclosure have been described herein for illustrative purposes, and various modifications can be made without departing from the scope and spirit of the present disclosure. Therefore, the various implementations disclosed in this article are not intended to be restrictive, and the true scope and spirit are indicated by the appended patent scope.

100: network environment 110, 120, 125: UE 130: wireless network 135: network node 200A, 200B, 300: scene 400: Communication system 410: device 420: device 412, 422: Processor 416, 426: Transceiver 414, 424: Memory 500, 600: process 510, 520, 610, 620: frame

The accompanying drawings are included to provide a further understanding of the present disclosure, are incorporated into and constitute a part of the present invention. The accompanying drawings illustrate the implementation of the present disclosure, and together with the description are used to explain the principle of the present disclosure. It can be understood that the drawings are not necessarily to scale, because in order to clearly illustrate the concept of the present invention, some elements may be shown to be out of proportion to the size in the actual implementation. Figure 1 is a schematic diagram of an example network environment in which various solutions and methods according to the present disclosure can be implemented. Figure 2A shows a schematic diagram of an example scenario according to an implementation of the present disclosure. Figure 2B shows a schematic diagram of an example scenario according to an implementation of the present disclosure. Figure 3 shows a schematic diagram of an example scenario according to an implementation of the present disclosure. Figure 4 is a block diagram of an example communication system according to an implementation of the present disclosure. Figure 5 is a flowchart of an example process according to an implementation of the present disclosure. Figure 6 is a flowchart of an example process according to an implementation of the present disclosure.

110, 120, 125: UE

135: network node

200A: scene

Claims (20)

A method includes: a processor of a device implemented in a user equipment (UE) of a V2X cluster in a New Radio (NR) vehicle to everything (V2X) communication environment, receiving from a member of the V2X cluster Scheduling requests; and In response to the reception of the scheduling request, the processor sends a resource grant to the member to allocate one or more of the resources to the member, The one or more resources are: Pre-configured by the wireless network, or Granted by the wireless network in response to the UE sending a resource request to the wireless network after receiving the scheduling request. The method described in item 1 of the scope of patent application also includes: The processor broadcasts a discovery signal with cluster information as a notification of the existence of the V2X cluster; In response to the broadcast of the discovery signal, the processor receives a report of the percentage of resources currently occupied by the communication from another UE; and In response to receiving the report, the processor determines that the other UE is a new member of the V2X cluster. The method described in item 1 of the scope of patent application also includes: Receiving a sign-out signal from the member by the processor; and In response to receiving the check-out signal, the processor determines that the member is checked out from the V2X cluster. The method described in item 1 of the scope of patent application also includes: In response to at least one of the following, the processor determines that the member is checked out from the V2X cluster: The first predetermined period of time has passed and no further scheduling request has been received from the member; and The member cannot be connected within the second predetermined period of time. The method described in item 1 of the scope of patent application also includes: It is detected by the processor that reference signal received power (RSRP) of a predetermined percentage of the members of the V2X cluster is lower than a predetermined threshold; and In response to the detection, one of the plurality of members is selected by the processor to act as a scheduler UE. The method according to claim 5, wherein selecting one of the plurality of members includes selecting the plurality of members based on one or more of a plurality of parameters related to each member of the plurality of members One of the members, wherein the multiple parameters include: The level of receiving RSRP; position; speed; Processing power. The method described in item 5 of the scope of patent application also includes: In response to a predetermined period of time that has not found a suitable member in the V2X cluster to act as the scheduler UE, the processor sends a disband signal to notify each member in the V2X cluster of the V2X cluster To be disbanded, and Before disbanding, the processor optionally performs another resource configuration on one or more of the plurality of members. The method described in item 1 of the scope of patent application also includes: The processor detects that a predetermined condition exists; In response to the detection, the processor sends a disband signal to notify each member of the V2X cluster that the V2X cluster is to be disbanded; and Before disbanding, the processor performs another resource configuration on one or more members of the multiple members of the V2X cluster. The method described in item 8 of the scope of patent application, wherein the predetermined condition may include at least one of the following: The channel busy rate of the UE is lower than a predetermined threshold; and A predetermined period of time has passed without finding a suitable member in the V2X cluster to act as the scheduler UE. The method described in item 1 of the scope of patent application also includes: Before receiving the scheduling request and sending the resource grant, the processor determines that the UE has the ability to act as a scheduler UE. The method described in item 10 of the scope of patent application also includes: In response to determining that the UE has the ability to act as a scheduler UE: The processor sends a request to the network node of the wireless network to request to be used as a scheduler UE; and The processor obtains the cluster identification (ID) of the V2X cluster associated with the scheduler UE by any of the following methods: Select the first ID to be used as the cluster ID of the V2X cluster; or A message permitting the request is received from the network node, the message indicating the second ID used as the cluster ID of the V2X cluster. One method includes: The processor of the device implemented in the user equipment (UE) detects the scheduler UE in the New Radio (NR) vehicle to everything (V2X) communication environment; and In response to the detection and at least one of the following, the processor selects the scheduler UE to join the V2X cluster associated with the scheduler UE: The channel occupancy rate in the NR V2X communication environment is greater than a predetermined threshold; The throughput of the UE is greater than a predetermined throughput; The data size of the data to be sent of the UE is greater than a predetermined size. The method described in item 12 of the scope of patent application, wherein selecting the scheduler UE includes: Measure the respective RSRP of each scheduler UE among multiple scheduler UEs; and Perform any of the following operations to select the scheduler UE: Selecting one of the multiple scheduler UEs that has the largest RSRP compared to other scheduler UEs among the multiple scheduler UEs as the scheduler UE; or One scheduler UE among the plurality of scheduler UEs is randomly selected as the scheduler UE. The method described in item 12 of the scope of patent application also includes: Sending, by the processor, a scheduling request with a buffer status report (BSR) to the scheduler UE; The processor receives the resource grant from the scheduler UE, and the scheduler UE configures the resources of one or more resources to the UE in response to the sending of the scheduling request; and The UE uses the allocated resources to send data. The method described in item 12 of the scope of patent application also includes: The processor determines that the UE has the ability to act as a new scheduler UE. The method described in item 15 of the scope of patent application also includes: When the UE is in the cellular coverage area of a network node of a wireless network: Sending, by the processor, a request to the network node to request the UE as the new scheduler; In the case that the network node permits the request: Receiving, by the processor, a message permitting the request from the network node; and The processor obtains the cluster identification (ID) of the V2X cluster associated with the scheduler UE in any of the following ways: selecting a first ID as the cluster ID of the V2X cluster; or from the network The node receives a message permitting the request, the message indicating the second ID used as the cluster ID of the V2X cluster; and In the case that the network node does not permit the request or does not receive permission from the network node, the processor maintains the current transmission mode. The method described in item 15 of the scope of patent application also includes: When the UE is not within the cellular coverage of the network node of the wireless network: The processor broadcasts a discovery signal with cluster information as a notification of the existence of the new V2X cluster; and The processor allocates resources for the members of the new V2X cluster. The method described in item 12 of the scope of patent application also includes: Detecting another scheduler UE of another V2X cluster by the processor; In response to the detection, the processor determines whether to join the other V2X cluster; and In response to determining to join the other V2X cluster, the processor executes a switching process to join the other V2X cluster. The method described in item 18 of the scope of patent application, wherein the handover process includes: Start the timer Sending a leave signal to the scheduler UE to notify the scheduler UE about leaving from the V2X cluster; Sending a join signal to the other scheduler UE to join the other V2X cluster; In response to receiving the permission to leave from the scheduler UE, perform any of the following operations: In the case of receiving permission to join the other V2X cluster from the another scheduler UE before the timer expires, join the other V2X cluster, or Returning to the initial transmission mode in the case that the permission to join the other V2X cluster is not received from the other scheduler UE before the timer expires; and In response to not receiving the permission for the departure from the scheduler UE, the connection with the scheduler UE is maintained. The method described in item 12 of the scope of patent application also includes: Starting a timer by the processor; Determining by the processor whether any signal is received from the scheduler UE before the timer expires; and One of the following operations is performed by the processor: In the case of receiving at least one signal from the scheduler UE before the timer expires, determining that the UE is still a member of the V2X cluster; In the case that no signal is received from the scheduler UE before the timer expires, determining that the UE is no longer a member of the V2X cluster; and In the case that no signal is received from the scheduler UE before the timer expires, it is determined that the UE is still a member of the V2X cluster.

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