WO2020001539A1 - 一种小区切换判决方法、装置、设备和边缘计算节点 - Google Patents

一种小区切换判决方法、装置、设备和边缘计算节点 Download PDF

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Publication number
WO2020001539A1
WO2020001539A1 PCT/CN2019/093276 CN2019093276W WO2020001539A1 WO 2020001539 A1 WO2020001539 A1 WO 2020001539A1 CN 2019093276 W CN2019093276 W CN 2019093276W WO 2020001539 A1 WO2020001539 A1 WO 2020001539A1
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Prior art keywords
vehicle
cell
user equipment
handover
information
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PCT/CN2019/093276
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English (en)
French (fr)
Inventor
黄梅青
黄强
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南京中兴软件有限责任公司
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Publication of WO2020001539A1 publication Critical patent/WO2020001539A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • Embodiments of the present disclosure relate to, but are not limited to, cell handover technologies, and in particular, to a cell handover decision method, device, device, edge computing node, and computer storage medium.
  • V2X messages can be transmitted in the following two ways: 1) Based on user equipment (User Equipment, (UE) to UE (Device-to-Device, D2D) direct discovery / communication (sidelink, ProSe) supports broadcast transmission of V2X messages through the PC5 interface; 2) broadcast transmission based on a separate carrier frequency network (Multimedia Broadcast Broadcast Multicast Service Service Over a Single Frequency Network mode and a single cell point-to-multipoint (SC-PTM) transmission method, which supports broadcast transmission of V2X messages through a Uu interface.
  • UE User Equipment
  • D2D Direct discovery / communication
  • sidelink, ProSe sidelink
  • SC-PTM single cell point-to-multipoint
  • the cell switching scheme is only for general mobile terminals such as mobile phones, and the handover decision is usually performed based on wireless network information.
  • the target cell can be switched according to service priorities or cell radio signal quality. s Choice.
  • This cell switching scheme does not take into account the unique laws of vehicle movement, and therefore cannot meet the unique needs of V2X communication services for cell switching methods.
  • An aspect of the present disclosure provides a cell handover decision method, the method comprising: acquiring communication quality information of a V2X user equipment and traffic information of a vehicle in which the V2X user equipment is located; and according to the communication of the V2X user equipment The quality information and the traffic information of the vehicle in which the V2X user equipment is located determine a handover decision result, where the handover decision result indicates whether a cell handover is initiated and a target cell to which the handover is to be performed when the cell handover is initiated.
  • the device includes an acquisition module and a decision module, wherein the acquisition module is configured to acquire communication quality information of a V2X user equipment and a location where the V2X user equipment is located. Traffic information of a vehicle; a judgment module, configured to determine a handover decision result based on the communication quality information of the V2X user equipment and the traffic information of the vehicle in which the V2X user equipment is located, where the handover decision result indicates whether to initiate a cell Handover and determining a target cell to which handover is required when initiating a cell handover.
  • the device includes a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used when running the computer program. , Performing any one of the foregoing cell handover decision methods.
  • Another aspect of the present disclosure provides an edge computing node, where the edge computing node includes any one of the above-mentioned cell switching decision devices.
  • Another aspect of the present disclosure provides a computer storage medium having a computer program stored thereon.
  • the processor executes the steps of any one of the foregoing cell handover decision methods.
  • FIG. 1 is a flowchart of a cell switching method according to an embodiment of the present disclosure
  • FIG. 2 is a signaling diagram of a cell switching method according to an embodiment of the present disclosure
  • FIG. 3 illustrates an application scenario of a cell handover decision method according to an embodiment of the present disclosure
  • FIG. 4 illustrates another application scenario of a cell handover decision method according to an embodiment of the present disclosure
  • FIG. 5 illustrates another application scenario of a cell handover decision method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a cell handover decision device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of a hardware structure of a cell handover decision device according to an embodiment of the present disclosure.
  • V2X communication refers to Vehicle-To-Vehicle (V2V), Vehicle-To-Pedestrian (V2P), and Vehicle-Infrastructure (Vehicle- To-Infrastructure (V2I) and communication between vehicles and the Internet (Vehicle-To-Network (V2N)).
  • V2X communication can send and receive information such as position, speed, and vehicle status based on 3GPP technology, and complete message interaction, so that users can obtain road environmental information in a timely manner, collaborate to perceive road dangerous conditions, optimize traffic, and prevent traffic safety accidents .
  • V2V communication can be used for information exchange and reminding between vehicles, for example, for anti-collision safety systems between vehicles.
  • V2I communication allows vehicles to communicate with roads and / or roadside units (RSUs) to obtain road management information such as traffic light signal timing. RSUs include, for example, traffic lights, roadblocks, and so on.
  • RSUs include, for example, traffic lights, roadblocks, and so on.
  • V2N communication is currently the most widely used form of vehicle-to-vehicle communication. It is used to connect vehicles to a cloud server through a mobile network to use navigation, entertainment, anti-theft and other application functions provided by the cloud server.
  • V2P communication can be used to provide safety warnings to pedestrians or non-motorized vehicles on the road.
  • V2X communication services have unique communication requirements for wireless communication networks.
  • vehicles that perform V2X communication services generally have higher driving speeds.
  • the driving speed of a vehicle can range from a low speed of 15km / h to a high speed of 250km / h. Therefore, a wireless communication network is required to support high-speed communication;
  • Second, most of the vehicles carrying V2X communication services are distributed on the road, and their topology shows a certain regularity.
  • V2X communication services have high requirements on delay. For example, in V2X communication services, data packets The delay cannot exceed 100ms.
  • V2X communication services For some special V2X communication services, the data packet delay needs to be controlled within 50ms, or even within 20ms. Fourth, V2X communication services are generally used to achieve secure communication. Therefore, for communication Reliability requirements are higher. For example, the success rate of receiving data packets in a certain range of V2X communication needs to be above 90%.
  • the target cell is mainly considered in consideration of, for example, service priority and cell radio quality.
  • V2X user equipment needs to perform cell switching, there are some problems. For example, when a V2X user equipment travels to the boundary of a serving cell, it is usually necessary to switch cells due to the degradation of the communication quality of the serving cell. If there are two cells with overlapping coverage areas in the user's driving direction, it is usually from these two cells. The cell with the higher communication quality is selected as the target cell for handover. When the V2X user equipment continues to drive, the communication quality of the cell with the better communication quality is getting worse and worse, and the cell with the poor communication quality is getting better and better. , Which leads to the need to switch again.
  • the vehicle's current serving cell (cell 1) communicates.
  • the quality is reduced.
  • the communication quality of cell 2 is higher than that of cell 3.
  • the service cell of the vehicle is switched from cell 1 to cell 2.
  • the vehicle turns left, it continues to drive and leaves the coverage area of cell 2.
  • the service cell of the vehicle needs to be switched from cell 2 to cell 3 again.
  • Such a situation of excessive cell handover caused by selecting a wrong target cell may cause a risk that the vehicle in which the V2X user equipment is located may experience QoS degradation during the movement process.
  • V2X user equipments when too many V2X user equipments cause network congestion, it is usually necessary to select some V2X user equipments to switch to other cells. If V2X user equipments that are about to leave the congested cell are selected for cell switching to switch to the neighbors of the congested cell, Area, as the V2X user equipment continues to drive and exits the neighbouring area, it needs to perform another cell handover. For example, in the application scenario shown in FIG. 4, there are too many vehicles in the coverage area of cell 1 causing cell 1 to be congested.
  • FIG. 1 is a flowchart of a cell handover method according to an embodiment of the present disclosure. As shown in FIG. 1, the process may include steps 101 and 102.
  • step 101 communication quality information of a V2X user equipment and traffic information of a vehicle in which the V2X user equipment is located are acquired.
  • the V2X user equipment is a user equipment for performing a V2X communication service, and the V2X user equipment is usually located in a vehicle.
  • the serving cell of the V2X user equipment is used to indicate a cell currently accessed by the V2X user equipment.
  • the serving cell of the V2X user equipment may have multiple neighboring cells.
  • the communication parameters of the serving cell of the V2X user equipment include, but are not limited to, the radio signal quality parameters of the serving cell of the V2X user equipment and the load of the serving cell of the V2X user equipment.
  • the communication parameters of the neighboring cells of the serving cell of the V2X user equipment include, but are not limited to, the radio signal quality parameters of the neighboring cells of the serving cell of the V2X user equipment and the load of the neighboring cells of the serving cell of the V2X user equipment.
  • the radio signal quality parameter of the cell is used to indicate the radio signal quality of the cell
  • the load of the cell is used to indicate the amount of user equipment traffic carried by the cell. The higher the value of the radio signal quality parameter of the cell, the higher the radio signal quality of the cell, the higher the load on the cell, and the higher the congestion level of the cell.
  • the communication quality information of the V2X user equipment includes at least one of the following: communication parameters of a serving cell of the V2X user equipment, and communication parameters of a neighboring cell of the serving cell of the V2X user equipment.
  • the traffic information of the vehicle in which the V2X user equipment is located may include, but is not limited to: the geographic location information of the vehicle in which the V2X user equipment is located, road map information, traffic signal information in the road area where the vehicle in which the V2X user equipment is located, and Driving information of the vehicle in which the V2X user equipment is located.
  • the traffic light information of the road area where the V2X user equipment is located can be obtained from a traffic information server.
  • the traffic light information is at least used to indicate the status and duration of the traffic light at each intersection of the road.
  • Road map information can be obtained from the cloud, road management department, or surveying and mapping department.
  • the driving information of the vehicle where the V2X user equipment is located includes the driving track information of the vehicle where the V2X user equipment is located.
  • the driving information of the vehicle where the V2X user equipment is located includes the driving speed of the vehicle where the V2X user equipment is located. .
  • the position of the vehicle where the V2X user equipment is located on the road can be obtained according to the road map information and the geographic location information of the V2X user equipment.
  • a handover decision result is determined according to the communication quality information of the V2X user equipment and the traffic information of the vehicle in which the V2X user equipment is located.
  • the handover decision result indicates whether to initiate a cell handover and when a cell handover is initiated. The target cell to be switched to.
  • the cell switching conditions can be set according to actual needs.
  • the cell switching conditions may include: the value of the radio signal quality parameter of the serving cell of the V2X user equipment is less than or equal to a set threshold, The value of the wireless signal quality parameter is greater than the set threshold; or, the cell switching condition may include: the load of the serving cell of the V2X user equipment is greater than or equal to the set load threshold, and the load of any neighboring cell of the serving cell of the V2X user equipment is less than Set the load threshold.
  • the handover decision result is determined according to the traffic information of the vehicle in which the V2X user equipment is located.
  • an initial target cell set is obtained, and the initial target cell set is used to indicate that the communication quality information of the V2X user equipment meets the cell switching condition of a neighboring cell. set.
  • a target cell to be handed over may be selected from the initial target cell set.
  • the cell handover decision method can implement the control of the cell handover process of 3GPP-based V2X user equipment. Specifically, when making a cell handover decision, it is necessary to consider the vehicle in which the V2X user equipment is located. Traffic information, and the traffic information of the vehicle in which the V2X user equipment is located can reflect the existence of vehicle movement. In this way, the target cell selected according to the traffic information of the vehicle in which the V2X user equipment is located can meet the V2X communication service to cell switching The unique needs of the way. That is to say, the method for cell handover decision according to the embodiment of the present disclosure can satisfy the demand for the cell handover mode of the V2X communication service, can effectively guarantee the quality of the V2X communication service, and reduce the risk of communication interruption.
  • the following will describe in detail a method for determining a handover decision result according to traffic information of a vehicle in which a V2X user equipment is located when a value of a wireless signal quality parameter of a serving cell of the V2X user equipment is less than or equal to a set threshold.
  • the waiting time of the vehicle may be determined according to the traffic signal information of the intersection ahead of the vehicle included in the traffic information of the vehicle. For example, if the traffic signal at the intersection in front of the vehicle is green, you can consider that the waiting time of the vehicle before passing the intersection is zero. If the traffic signal at the intersection in front of the vehicle is red, you can determine whether the vehicle is at the red light remaining time. How long to wait before passing the intersection ahead. For example, the remaining time of the red light may be used as the waiting time of the vehicle before passing the intersection, or the waiting time of the vehicle before the passing of the intersection is greater than the remaining time of the red light.
  • the distance between the vehicle and the intersection in front may be determined according to the geographic location information of the vehicle and the road map information included in the traffic information.
  • the waiting time of the vehicle is greater than or equal to the set duration, it means that the vehicle needs a long time to pass the intersection ahead.
  • other traffic information of the vehicle may not be considered, for example, the vehicle may not be considered.
  • the distance from the intersection in front and the driving information of the vehicle determines that a cell handover is initiated to the V2X user equipment, and the target cell to be handed over may be determined according to the communication quality information of the V2X user equipment in the vehicle.
  • a cell in the initial target cell set, a cell can be arbitrarily selected as the target cell to be handed over, or in the initial target cell set, a cell with the highest radio signal quality or the cell with the least load can be selected as the target to be handed over Community.
  • a switching judgment result may be determined according to a distance between the vehicle and a forward intersection and driving information of the vehicle. It can be seen that the result of the handover decision is not only related to the distance between the vehicle and the intersection in front, but also the driving information of the vehicle. That is to say, the result of the handover decision needs to be determined according to the law of vehicle movement. Unique requirements for switching methods. When determining the initiation of a cell handover, an appropriate target cell can be selected according to the law of vehicle movement to avoid redundant handover caused by selecting the wrong target cell and the degradation of service quality caused by redundant handover.
  • the initial target cell set can be selected to drive with the vehicle after passing the intersection Cells with matching trajectories are used as target cells to be switched to.
  • the trajectory of the vehicle passing through the front intersection includes, but is not limited to: the vehicle can go straight through the front intersection, the vehicle can make a U-turn through the front intersection, and the vehicle can make non-U-turn turns (for example, turn left and right) through the front intersection.
  • the vehicle can go straight through the intersection, or when the vehicle makes non-turn-around driving through the front intersection, it can be considered that the vehicle needs to make non-turn-through driving through the front intersection.
  • the neighborhood can be considered to be consistent with the vehicle trajectory after passing the intersection;
  • a cell having the largest overlap between the coverage area and the driving trajectory of the vehicle after passing the intersection may be selected as the target cell to be switched to.
  • the vehicle's driving information indicates that the vehicle needs to make a U-turn through the intersection
  • the target cell to be switched to may be determined according to the communication quality information of the V2X user equipment. For example, in the initial target cell set, a cell can be arbitrarily selected as the target cell to be switched to; or, in the initial target cell set, a cell with the highest radio signal quality or the cell with the least load can be selected as the target to be switched to Community.
  • the following will describe in detail a method for determining a handover decision result according to traffic information of a vehicle in which a V2X user equipment is located when a load of a serving cell of the V2X user equipment is greater than or equal to a set load threshold.
  • the serving cell of the V2X user equipment is a congested cell, and a determination result is obtained. For example, when the load of the serving cell of the V2X user equipment exceeds the set load threshold, the determination result is: the serving cell of the V2X user equipment is a congested cell; when the load of the serving cell of the V2X user equipment does not exceed the set load threshold, the determination is made The result is that the serving cell of the V2X user equipment is not a congested cell.
  • the traffic signal information of the intersection ahead of the vehicle may be acquired, and the waiting time of the vehicle may be determined according to the traffic signal information. Determining the distance between the vehicle and the intersection in front of the vehicle according to the geographic location information of the vehicle and the road map information. A switching decision result is obtained according to the determination result, the waiting time of the vehicle, and the distance between the vehicle and the intersection in front.
  • the handover decision result may be determined according to the waiting time of the vehicle and the distance between the vehicle and the intersection in front. For example, when the waiting time of the vehicle is greater than or equal to the set duration, it is determined to initiate a cell handover, and the target cell to be handed over is determined according to the communication quality information of the V2X user equipment; when the waiting time of the vehicle is less than the set duration , Determine a switching decision result according to the distance between the vehicle and the intersection in front.
  • the serving cell of the V2X user equipment is a congested cell, and the distance between the vehicle and the intersection in front is less than the set distance, and the waiting time of the vehicle is shorter than the set time, it means that the vehicle will pass in a short time
  • the intersection ahead that is, the vehicle needs to wait for a short time to pass through the intersection before keeping access to the serving cell of the V2X user equipment.
  • blind switching to a congested cell can be avoided, that is, it is possible to Avoid redundant handovers caused by selecting the wrong target cell and service quality degradation caused by redundant handovers.
  • steps 101 to 102 may be implemented by an edge computing node in a V2X service deployment scenario.
  • the edge computing node may include devices such as a memory and a processor.
  • Edge computing nodes can provide low-latency and highly reliable communication services for user equipment. Specifically, it is possible to provide information technology service environment and cloud computing capabilities at the edge of the network, close to mobile users, and push content distribution to users (such as base stations) to deploy applications, services, and content at a high level. In a distributed environment, it can better support low-latency and high-bandwidth service requirements in 5G networks.
  • the use of edge computing technology combined with traditional wireless methods can more optimally solve the problem of V2X communication service switching.
  • handover instruction information may be sent to a base station corresponding to a serving cell of a V2X user equipment, the handover instruction information being used to indicate whether to initiate a cell handover to the V2X user equipment, and Determine the target cell to be handed over when initiating the cell handover.
  • the base station may determine whether to perform cell handover according to the handover instruction information, and when determining to perform handover, handover the serving cell of the V2X user equipment to the target cell.
  • the time range to which the handover instruction information is applicable may also be sent to a base station corresponding to the serving cell of the V2X user equipment. After receiving the handover instruction information and the time range for which the handover instruction information is applicable, the base station can determine whether the current time is within the time range where the handover instruction information is applicable. If the current time is within the time range where the handover instruction information is applicable, the base station can The handover instruction information is operated. If the current time has exceeded the time range to which the handover instruction information is applicable, the base station can ignore the handover instruction information.
  • the applicable time range of the switching instruction information may be determined according to the traffic signal time of the intersection in front of the vehicle.
  • the applicable time range of the switching instruction information may be a time period from the current time to the next red light time.
  • the base station may be an integrated base station, a central unit (CU) in a transfer control (C ⁇ U) separation mode, or a distribution unit (DU) in a C ⁇ U separation mode, or the like.
  • CU central unit
  • DU distribution unit
  • FIG. 2 is a signaling diagram of a cell switching method according to an embodiment of the present disclosure.
  • the edge computing node can be connected to a base station, a traffic light information server, and a road information server, respectively.
  • the traffic light information server is used to store road traffic light information
  • the road information server is used to store road map information.
  • the connection mode between the edge computing node and the traffic light information server and the road information server may be a direct connection mode or an indirect connection mode.
  • the flow of the cell switching method may include steps 200 to 230.
  • the edge computing node obtains traffic signal information of the road area where the vehicle where the V2X user equipment is located from the traffic light information server, and obtains road map information from the road information server.
  • V2X user equipment can also report vehicle driving information to edge computing nodes.
  • the information received by the edge computing nodes can be used as the basis for the cell handover decision.
  • step 210 the base station sends the communication quality information of the V2X user equipment to the edge computing node.
  • the base station can monitor the communication parameters of the serving cell of the V2X user equipment to predict whether the quality of service (QoS) of the V2X communication service will change.
  • QoS quality of service
  • the base station may send wireless information related to the V2X communication service (that is, communication quality information of the V2X user equipment) to the edge computing node.
  • step 220 the edge computing node makes a cell handover decision based on the received information.
  • step 230 the edge computing node sends handover instruction information to the base station.
  • the handover instruction information may indicate whether the base station performs a cell handover.
  • the handover instruction information instructs the base station to perform a cell handover, it may also indicate a target cell to which the V2X user equipment is to be handed over.
  • step 240 after receiving the handover instruction information for instructing the cell handover, the base station performs the cell handover according to the handover instruction information.
  • FIG. 3 illustrates an application scenario of a cell handover decision method according to an embodiment of the present disclosure.
  • the V2X user equipment on the vehicle is currently connected to cell 1.
  • the direction of the vehicle is covered by cell 2.
  • the direction of the left turn of the vehicle is covered by cell 2 and cell 3.
  • the intersection area is in cell 1, cell 2, and cell. 3's common coverage.
  • the edge computing node described above can be set near the intersection.
  • the wireless communication quality of cell 1 starts to decrease.
  • the wireless network The system can make a handover decision and select a suitable handover target cell for the V2X user equipment on the vehicle.
  • the cell handover decision may be performed on the V2X user equipment by using the above cell handover decision method.
  • the edge computing node updates the latest road information and traffic signal information in real time.
  • the V2X user equipment can detect the wireless signal quality parameters of the serving cell and each neighboring area, and report the detected wireless signal quality parameters to the base station.
  • the base station determines that the value of the radio signal quality parameter of the current serving cell (cell 1) of the V2X user equipment is less than the set threshold, it indicates that the QoS of the V2X communication service may be affected.
  • the base station may send a message to the edge computing node to instruct the edge computing node to start a cell handover decision for the V2X user equipment, and the message sent by the base station to the edge computing node may also include the current serving cell of the V2X user equipment.
  • Radio signal quality parameters radio signal quality parameters of neighboring cells of the current serving cell of the V2X user equipment, and geographic location information of the V2X user equipment.
  • the values of the wireless signal quality parameters of the cells 2 and 3 are greater than the set threshold, and the values of the wireless signal quality parameters of the cell 2 are greater than the wireless values of the cell 3 The value of the signal quality parameter.
  • the edge computing node makes a handover decision based on the obtained information (including communication quality information of the V2X user equipment and traffic information of the vehicle in which the V2X user equipment is located).
  • the edge computing node uses the geographic location information of the V2X user equipment to map the geographic location of the vehicle in which the V2X user equipment is located to the real-time road map.
  • the vehicle is calculated based on the mapping result to determine that the vehicle is located at the intersection, further integration is required.
  • the traffic signal information of the intersection is judged for switching.
  • the green light at the current crossroads area facing the vehicle is illuminated, or the red light at the crossroads area is illuminated toward the vehicle, and the remaining time of the red light is less than the set duration (for example, 5s), it is necessary to further switch according to the direction of the vehicle judgment.
  • map according to the coverage of each cell and the wireless coverage area of the road after the left turn and determine the road after the left turn (or the driving trajectory after the left turn) and the coverage of the cell 3.
  • There is the largest overlapping portion so that it is determined that the cell 3 is a cell consistent with the driving trajectory of the vehicle, and therefore, the cell 3 can be selected as the handover target cell.
  • the red light towards the vehicle at the current intersection area lights up and the remaining time of the red light is longer than the set duration, the cell with the largest wireless signal quality parameter (ie cell 2) can be selected as the handover target cell.
  • the edge computing node sends handover instruction information to the base station, and the handover decision result is carried in the handover instruction information. That is, the handover instruction information is used to instruct the base station to operate according to the obtained handover decision result.
  • the edge computing node may also send the time range to which the handover instruction information is applicable.
  • the time range to which the handover instruction information is applicable may be : The time period from the current time to the next red light time.
  • the base station may perform corresponding operations according to the received handover instruction information and a time range to which the handover instruction information is applicable. Specifically, if the base station receives the handover instruction information, the current time is no longer within the time range to which the handover instruction information is applicable, or when the handover execution is expected to be no longer within the time range to which the handover instruction information applies, the handover may be ignored. Indication information, otherwise, cell handover may be performed according to the handover instruction information. If the base station ignores the handover instruction information, the base station may send a handover decision request to the edge computing node to request the edge computing node to make a handover decision, or the base station may perform the handover by itself judgment.
  • FIG. 4 illustrates another application scenario of a cell handover decision method according to an embodiment of the present disclosure.
  • the V2X user equipment on the vehicle is currently accessing cell 1.
  • cell 1 is a congested cell.
  • Cell 1 and cell 2 have the same or similar coverage, and the V2X user equipment on the vehicle is in cell 1 at the same time.
  • V-ue1 is the vehicle at the head of the team, near the intersection
  • V-ue2 is the vehicle at the end of the team, which is far from the intersection.
  • the edge computing nodes described above can be set near the intersection.
  • the wireless network system determines that cell 1 is a congested cell, it can start congestion control. It plans to switch some V2X user equipment from cell 1 to other cells. At this time, the wireless network system starts to initiate a handover decision and selects the appropriate V2X user equipment as the handover. Object.
  • the edge computing node updates the latest road information and traffic signal information in real time.
  • the base station corresponding to each cell respectively sends to the edge computing node the radio signal quality parameters of the current corresponding cell, the congestion indication information of the corresponding cell, and the list of V2X user equipment in the corresponding cell. 2.
  • the congestion indication information of cell 1 indicates that cell 1 is a congested cell
  • the congestion indication information of cell 2 indicates that cell 2 is not a congested cell
  • the congestion indication information of cell 3 indicates that cell 3 is not a congested cell.
  • the edge computing node makes a handover decision based on the obtained information (radio signal quality parameters of each cell, congestion indication information, list of V2X user equipment, and geographic location information of V2X user equipment).
  • the edge computing node uses the list of V2X user equipments in cell 1 as the user equipment list for handover candidates.
  • the edge computing node uses the geographic location information of the V2X user equipment to map the geographic locations of the vehicles of the V2X user equipment in the user equipment candidate list to the real-time road map, and calculates the distance between each vehicle and the intersection according to the mapping result. If the distance between the vehicle and the intersection is less than the set distance, it is considered that the vehicle is near the intersection, and it is necessary to further combine the traffic signal information of the intersection to make a switching decision.
  • the vehicle near the intersection is considered to be passing the intersection.
  • the system does not need to initiate a cell handover for it, so V2X user equipment in the vehicle is excluded from the handover candidate user equipment list. That is, at the current moment, the V2X user equipment in the vehicle is not switched to the cell, and access to the original serving cell is maintained.
  • the V2X user equipment in the vehicle can be switched to other communities To reduce the load of the current serving cell of the V2X user equipment.
  • the V2X user equipment in the vehicle may be switched to another cell to reduce the load of the current serving cell of the V2X user equipment. That is, according to the distance between the vehicle and the intersection, the V2X user equipment that currently needs to perform cell switching can be selected from the user equipment candidate list of handover candidates.
  • vehicles that are far away from the intersection are preferred because these vehicles take a relatively long time to leave the congested area, and the wireless congestion situation of cell 1 will not be automatically reduced for a period of time.
  • the edge computing node sends handover instruction information to the base station, and the handover instruction information indicates the V2X user equipment that currently needs to perform cell handover.
  • the base station may perform cell handover on the V2X user equipment in the vehicle V-ue2.
  • the edge computing node may also send the time range to which the handover instruction information is applicable, for example, the time range to which the handover instruction information is applicable may be a time period from the current time to the next red light time.
  • the base station may perform corresponding operations according to the received handover instruction information and a time range to which the handover instruction information is applicable. Specifically, if the base station receives the handover instruction information, the current time is no longer within the time range to which the handover instruction information is applicable, or when the handover execution is expected to be no longer within the time range to which the handover instruction information applies, the handover may be ignored Instruction information, otherwise, cell handover may be performed according to the handover instruction information. If the base station ignores the handover instruction information, the base station may send a handover decision request to the edge computing node to request the edge computing node to make a handover decision, or the base station may also make a handover decision by itself.
  • FIG. 5 illustrates another application scenario of a cell switching method according to an embodiment of the present disclosure.
  • the V2X user equipment on the vehicle is currently accessing cell 1 and the vehicle is directly covered by cell 2 in the direction of the vehicle.
  • the intersection area is within the common coverage area of cell 1 and cell 2.
  • the above-mentioned edge computing node is deployed near the intersection, and the base stations where cell 1 and cell 2 are located access the edge computing node.
  • the edge computing node can also receive the traffic signal information of the road, and can obtain the road information of the intersection from the cloud or the local traffic management department server.
  • the wireless signal quality of cell 1 starts to decline, and the wireless network system starts to initiate a handover decision to select a suitable handover target cell for it.
  • the edge computing node updates the latest road information and traffic signal information in real time; when the vehicle approaches the intersection, the V2X user equipment can detect the wireless signal quality parameters of the serving cell and each neighboring area, and report the detected wireless signal quality parameters to the base station.
  • the base station determines that the value of the wireless signal quality parameter of the current serving cell (cell 1) of the V2X user equipment is less than the set threshold, it indicates that the QoS of the V2X communication service may be affected.
  • the base station may send a message to the edge computing node to indicate the edge
  • the computing node begins to make a handover decision for the V2X user equipment, and the message sent by the base station to the edge computing node may also carry the radio signal quality parameters of the current serving cell of the V2X user equipment, and the neighboring cells of the current serving cell of the V2X user equipment. And the geographic location information of the V2X user equipment, where the value of the radio signal quality parameter of cell 2 is greater than a set threshold.
  • the edge computing node makes a cell handover decision based on the obtained information (including communication quality information of the V2X user equipment and traffic information of the vehicle in which the V2X user equipment is located). Specifically, the edge computing node uses the geographic location information of the V2X user equipment to map the geographic location of the vehicle where the V2X user equipment is located to the real-time road map. When determining that the vehicle is located at the intersection area, it is necessary to further combine the intersection Traffic light information is used to make a switch decision. When the green light at the crossroads area facing the vehicle is on, or the red light at the crossroads area is facing the vehicle, and the remaining time of the red light is less than the set time (for example, 5s), it is necessary to further combine the direction of the vehicle for the community.
  • the set time for example, 5s
  • the V2X user equipment of the vehicle is considered to be within the coverage of cell 1 for a certain period of time.
  • the wireless signal quality of cell 1 may change, it is not performed on the V2X user equipment in the vehicle Cell switching, keeping access to the current serving cell.
  • the cell with the highest wireless signal quality parameter (such as cell 2) can be selected as the handover target cell.
  • the edge computing node sends handover instruction information to the base station, and the handover instruction information includes the determined cell handover decision result, that is, the handover instruction information is used to instruct the base station to perform an operation according to the obtained handover decision result.
  • the edge computing node may also send the time range to which the handover instruction information is applicable, for example, the time range to which the handover instruction information is applicable may be a time period from the current time to the next red light time.
  • the base station may perform corresponding operations according to the received handover instruction information and a time range to which the handover instruction information is applicable. Specifically, if the base station receives the handover instruction information, the current time is no longer within the time range to which the handover instruction information is applicable, or when the handover execution is expected to be no longer within the time range to which the handover instruction information is applicable, the handover may be ignored. Instruction information, otherwise, cell handover may be performed according to the handover instruction information. If the base station ignores the handover instruction information, the base station may send a handover decision request to the edge computing node to request the edge computing node to make a handover decision, or the base station may also make a handover decision by itself.
  • FIG. 6 is a schematic structural diagram of a cell handover decision device according to an embodiment of the present disclosure. As shown in FIG. 6, the apparatus includes an obtaining module 601 and a decision module 602.
  • the obtaining module 601 is configured to obtain communication quality information of a V2X user equipment and traffic information of a vehicle in which the V2X user equipment is located.
  • the decision module 602 is configured to determine a handover decision result according to the traffic quality information of the V2X user equipment when the preset cell switching conditions are met, and the handover decision result indicates whether to initiate a cell handover based on the traffic information of the vehicle in which the V2X user equipment is located. , And the target cell to be handed over when initiating a cell handover.
  • the above acquisition module 601 and decision module 602 may each be a central processing unit (CPU), a microprocessor (Micro Processor Unit, MPU), a digital signal processor (DSP), Or Field Programmable Gate Array (FPGA).
  • CPU central processing unit
  • MPU Micro Processor Unit
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • the functional modules in this embodiment may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional modules.
  • the integrated unit is implemented in the form of a software functional module and is not sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of this embodiment is essentially or It is said that a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for making a computer device (can It is a personal computer, a server, or a network device) or a processor (processor) to perform all or part of the steps of the method described in this embodiment.
  • the foregoing storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or optical disks and other media that can store program codes.
  • the computer program instructions corresponding to a cell switching decision method in this embodiment may be stored on a storage medium such as an optical disc, a hard disk, a USB flash drive, and the like, when the computer in the storage medium corresponds to a cell switching decision method
  • a storage medium such as an optical disc, a hard disk, a USB flash drive, and the like
  • the program instructions are read or executed by an electronic device, the steps of any one of the cell handover decision methods of the foregoing embodiments are implemented.
  • FIG. 7 is a schematic diagram of a hardware structure of a cell handover decision device according to an embodiment of the present disclosure.
  • the cell switching decision device 70 may include: a memory 71, a processor 72, and a bus 73.
  • the bus 73 is used to connect the memory 71 and the processor 72 and to transmit communication data between the memory 71 and the processor 72.
  • the memory 71 is configured to store a computer program and data.
  • the processor 72 is configured to execute a computer program stored in the memory to implement the steps of any one of the cell handover decision methods in the foregoing embodiments.
  • the foregoing memory 71 may be volatile memory (for example, RAM); or non-volatile memory (for example, ROM, flash memory, hard disk). Drive (HDD) or Solid-State Drive (SSD); or a combination of the above types of memory, and provides instructions and data to the processor 72.
  • the processor 72 may be an Application Specific Integrated Circuit (ASIC), a DSP, a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), an FPGA, a CPU, At least one of a controller, a microcontroller, and a microprocessor. It can be understood that, for different devices, the electronic device for realizing the processor function may be other, which is not specifically limited in the embodiments of the present disclosure.
  • An embodiment of the present disclosure further provides an edge computing node, and the edge computing node includes any one of the cell switching decision devices described above.
  • the embodiments of the present disclosure may be provided as a method, a system, or a computer program product. Therefore, the present disclosure may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) containing computer-usable program code therein.
  • computer-usable storage media including, but not limited to, magnetic disk storage, optical storage, and the like
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
  • the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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Abstract

本公开实施例提供了一种小区切换判决方法、设备、装置和计算机存储介质。所述小区切换判决方法包括：获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息；根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及确定发起小区切换时待切换到的目标小区。

Description

一种小区切换判决方法、装置、设备和边缘计算节点 技术领域
本公开实施例涉及但不限于小区切换技术，尤其涉及一种小区切换判决方法、装置、设备、边缘计算节点和计算机存储介质。
背景技术
随着车联网越来越受到大家的重视，基于第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)蜂窝技术的车联网技术正在成为研究的热点，从3GPP Release14开始，一直在进行车联网相关技术的研究。基于3GPP R14长期演进(Long Term Evolution，LTE)的车联网技术中，车-万物(Vehicle-To-Everything，V2X)的消息的传输可以采用以下两种方式：1)基于用户设备(User Equipment，UE)到UE(Device-to-Device，D2D)的直接发现/通信(sidelink，ProSe)支持通过PC5接口进行V2X消息的广播传输；2)基于单独载频网络的广播传输(Multimedia Broadcast Multicast Service over a Single Frequency Network)方式以及单小区点对多点(Single Cell Point to Multipoint，SC-PTM)的传输方式，支持通过Uu接口进行V2X消息的广播传输。在基于3GPP R15的车联网技术中，又引入了5G的边缘计算、网络切片等技术。
与一般的移动终端如手机相比，车辆运动存在独特的规律，使V2X通信业务对无线通信网络具有独特的通信需求。相关技术中，小区切换方案仅仅是针对一般的移动终端如手机得出的，通常是基于无线网络信息来执行切换判决的，例如，可以根据业务优先级或小区无线信号质量等来进行切换目标小区的选择。这种小区切换方案并没有考虑车辆运动存在的独特的规律，因而不能满足V2X通信业务对小区切换方式的独特的需求。
发明内容
本公开的一方面提供了一种小区切换判决方法，所述方法包括： 获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息；根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及确定发起小区切换时待切换到的目标小区。
本公开的另一方面提供了一种小区切换判决装置，所述装置包括：获取模块和判决模块，其中，获取模块，用于获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息；判决模块，用于根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及确定发起小区切换时需要切换到的目标小区。
本公开的另一方面提供了一种小区切换判决设备，所述设备包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述任意一种小区切换判决方法。
本公开的另一方面提供了一种边缘计算节点，所述边缘计算节点包括上述任意一种小区切换判决设备。
本公开的另一方面提供了一种计算机存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时，所述处理器执行上述任意一种小区切换判决方法的步骤。
附图说明
图1为根据本公开的实施例的小区切换方法的流程图；
图2为根据本公开的实施例的小区切换方法的信令图；
图3示出了根据本公开的实施例的小区切换判决方法的应用场景；
图4示出了根据本公开的实施例的小区切换判决方法的另一应用场景；
图5示出了根据本公开的实施例的小区切换判决方法的另一应 用场景；
图6为根据本公开的实施例的小区切换判决装置的组成结构示意图；
图7为根据本公开的实施例的小区切换判决设备的硬件结构示意图。
具体实施方式
以下结合附图及实施例，对本公开进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本公开，并不用于限定本公开。
在V2X业务部署场景中，V2X通信指的是车车之间(Vehicle-To-Vehicle，V2V)、车与行人之间(Vehicle-To-Pedestrian，V2P)、车与基础设施之间(Vehicle-To-Infrastructure，V2I)以及车与互联网(Vehicle-To-Network，V2N)之间的通信。V2X通信可以基于3GPP技术进行位置、速度、车辆状态等信息的发送与接收，完成消息的交互，从而使得用户及时获取道路环境信息，协作感知道路危险状况，优化交通，并防止交通安全事故的发生。
下面对V2X通信中几类通信方式进行说明：V2V通信可以用于在车辆间进行信息交互和提醒，例如，用于车辆间防碰撞安全系统。V2I通信允许车辆可以与道路和/或路边单元(Road Side Unit，RSU)进行通信以获取交通灯信号时序等道路管理信息，RSU包括例如交通灯、路障等。V2N通信是目前应用最广泛的车联网通信形式，其用于使车辆通过移动网络连接到云服务器，以使用云服务器提供的导航、娱乐、防盗等应用功能。V2P通信可以用于向道路上的行人或非机动车提供安全警告。
与一般的移动终端如手机相比，车辆运动存在独特的规律，使V2X通信业务对无线通信网络具有独特的通信需求。具体地，第一，进行V2X通信业务的车辆通常具有较高的行驶速度，例如，车辆的行驶速度可以从低速的15km/h一直到高速的250km/h，因此需要无线 通信网络支持高速通信；第二，进行V2X通信业务的车辆中的大部分都分布在道路上，其拓扑结构呈现一定的规律性；第三，V2X通信业务对时延要求较高，例如，V2X通信业务中，数据包的时延不能超过100ms，对于一些特殊的V2X通信业务，数据包时延需要控制在50ms内，甚至需要控制在20ms以内；第四，V2X通信业务一般用于实现安全通信，因此，对于通信的可靠性要求更高，例如，在一定范围的V2X通信的数据包接收成功率需要在90％以上。
当前的无线网络的切换处理策略中，主要考虑例如业务优先级、小区无线质量等来切换目标小区。在当前的无线网络下，在V2X用户设备需要进行小区切换时，存在一些问题。例如，在V2X用户设备行驶到服务小区的边界时，由于服务小区的通信质量下降通常需要切换小区，如果用户行驶方向上存在覆盖区域部分重叠的两个小区，通常情况下是从这两个小区中选择通信质量较高的小区作为目标小区进行切换，V2X用户设备继续行驶时，该通信质量较好的小区的通信质量越来越差，原通信质量较差的小区的通信质量越来越好，这就导致了需要再次进行切换。例如，在图3所示的应用场景中，车辆的左转方向上存在覆盖区域部分重叠的小区2和小区3，在车辆行驶到十字路口位置时，车辆的当前服务小区(小区1)的通信质量下降，小区2的通信质量高于小区3的通信质量，通常情况下是将车辆的服务小区从小区1切换到小区2，然而，当车辆左转后继续行驶并驶离小区2的覆盖区域时，需要再次将车辆的服务小区从小区2切换到小区3。这种选择错误目标小区带来的过多的小区切换的情况可能导致V2X用户设备所处在的车辆在移动过程中出现QoS下降的风险。此外，在V2X用户设备过多导致网络拥塞时，通常需要选择部分V2X用户设备切换到其他小区，如果选择了即将驶出该拥塞小区的V2X用户设备进行小区切换以切换到拥塞小区邻近位置的邻区，则随着V2X用户设备继续行驶并驶出该邻区时，还需要再进行一次小区切换。例如，在图4所示的应用场景中，小区1的覆盖区域内车辆过多导致小区1拥塞，如果将靠近十字路口或等待通过十字路口的时间较短的车辆V-ue1的服务小区从小区1切换到小区2以解决拥塞，那么在车辆V-ue1 驶出小区1时，还需要将V-ue1的服务小区从小区2切换到小区3。这种冗余切换也可能导致V2X用户设备的QoS下降。
基于上述记载的V2X通信业务部署场景、以及V2X通信业务对无线通信网络具有独特的通信需求，提出以下实施例。
本公开实施例提出了一种小区切换判决方法，图1为根据本公开的实施例的小区切换方法的流程图。如图1所示，该流程可以包括步骤101和步骤102。
在步骤101，获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息。
这里，V2X用户设备为用于执行V2X通信业务的用户设备，V2X用户设备通常位于车辆中。
V2X用户设备的服务小区用于表示V2X用户设备当前接入的小区，V2X用户设备的服务小区可以具有多个邻区。V2X用户设备的服务小区的通信参数包括但不限于：V2X用户设备的服务小区的无线信号质量参数和V2X用户设备的服务小区的负荷。V2X用户设备的服务小区的邻区的通信参数包括但不限于：V2X用户设备的服务小区的邻区的无线信号质量参数和V2X用户设备的服务小区的邻区的负荷。小区的无线信号质量参数用于表示小区的无线信号质量，小区的负荷用于表示小区所承载的用户设备的业务量的多少。小区的无线信号质量参数的值越高，说明小区的无线信号质量越高，小区的负荷越高，说明小区的拥塞程度越高。
所述V2X用户设备的通信质量信息包括以下至少一项：V2X用户设备的服务小区的通信参数、V2X用户设备的服务小区的邻区的通信参数。V2X用户设备所处在的车辆的交通信息可以包括但不限于：V2X用户设备所处在的车辆的地理位置信息、道路地图信息、V2X用户设备所处在的车辆所在道路区域的交通信号灯信息和V2X用户设备所处在的车辆的行驶信息。
V2X用户设备所处在的车辆所在道路区域的交通信号灯信息可以从交通信息服务器获取，交通信号灯信息至少用于表示道路的每个路口的交通信号灯的状态和状态持续时间。道路地图信息可以从云端、 道路管理部门或者测绘部门获取。V2X用户设备所处在的车辆的行驶信息包括V2X用户设备所处在的车辆的行驶轨迹信息，例如，V2X用户设备所处在的车辆的行驶信息包括V2X用户设备所处在的车辆的行驶速度。可以根据道路地图信息、以及V2X用户设备的地理位置信息，得出V2X用户设备所处在的车辆在道路上的位置。
在步骤102，根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及发起小区切换时待切换到的目标小区。
小区切换条件可以根据实际需求设置，例如，小区切换条件可以包括：V2X用户设备的服务小区的无线信号质量参数的值小于或等于设定门限，且V2X用户设备的服务小区的任意一个邻区的无线信号质量参数的值大于设定门限；或者，小区切换条件可以包括：V2X用户设备的服务小区的负荷大于或等于设定负荷门限，且V2X用户设备的服务小区的任意一个邻区的负荷小于设定负荷门限。
当V2X用户设备的通信质量信息满足预设的小区切换条件时，根据V2X用户设备所处在的车辆的交通信息，确定切换判决结果。
当V2X用户设备的通信质量信息满足预设的小区切换条件时，得出初始目标小区集合，所述初始目标小区集合用于表示V2X用户设备的通信质量信息满足所述小区切换条件的邻区的集合。当确定对V2X用户设备发起小区切换时，可以在初始目标小区集合中选取待切换到的目标小区。
通过根据本公开的实施例的小区切换判决方法可以实现对基于3GPP的V2X的用户设备的小区切换过程的控制，具体地，在进行小区切换判决时，需要考虑V2X用户设备所处在的车辆的交通信息，而V2X用户设备所处在的车辆的交通信息可以反映车辆运动存在的规律，如此，根据V2X用户设备所处在的车辆的交通信息选择的目标小区，能够满足V2X通信业务对小区切换方式的独特的需求。也就是说，根据本公开的实施例的小区切换判决的方法可以满足V2X通信业务对小区切换方式的需求，能够有效地保证V2X通信业务质量，降低通 信中断危险。
当V2X用户设备的通信质量信息不满足预设的小区切换条件时，不对V2X用户设备发起小区切换，V2X用户设备保持接入当前的服务小区。
下面将进行详细描述当V2X用户设备的服务小区的无线信号质量参数的值小于或等于设定门限时，根据V2X用户设备所处在的车辆的交通信息，确定切换判决结果的方法。
根据本公开的实施例，可以根据所述车辆的交通信息中包括的所述车辆的前方路口的交通信号灯信息，确定所述车辆的等待时长。例如，如果车辆的前方路口的交通信号灯为绿灯，则可以认为车辆在通过前方路口前的等待时长为零，如果车辆的前方路口的交通信号灯为红灯，可以根据红灯的剩余时间确定车辆在通过前方路口前的等待时长。例如，可以将红灯的剩余时间作为车辆在通过前方路口前的等待时长，或者，车辆在通过前方路口前的等待时长大于红灯的剩余时间。
可以根据所述交通信息中包括的所述车辆的地理位置信息和所述道路地图信息，确定所述车辆与前方路口的距离。当所述车辆的等待时长大于或等于设定时长时，说明车辆还需要较长的时间才能通过前方路口，此时，可以不考虑所述车辆的其他交通信息，例如，可以不考虑所述车辆与前方路口的距离和所述车辆的行驶信息，确定对V2X用户设备发起小区切换，并且可以根据车辆中的所述V2X用户设备的通信质量信息，确定待切换到的目标小区。例如，可以在初始目标小区集合中，任意选择一个小区作为待切换到的目标小区，或者，可以在初始目标小区集合中，选择无线信号质量最高的小区或负荷最小的小区作为待切换到的目标小区。
当所述车辆的等待时长小于设定时长时，可以根据所述车辆与前方路口的距离、以及所述车辆的行驶信息，确定切换判决结果。可以看出，切换判决结果不仅与车辆与前方路口的距离有关，而且与车辆的行驶信息有关，也就是说，需要根据车辆运动的规律，确定切换判决结果，进而，能够满足V2X通信业务对小区切换方式的独特的需 求。在确定发起小区切换时，可以根据车辆运动的规律，选择合适的目标小区，避免选择错误的目标小区带来的冗余切换、以及冗余切换带来的业务质量下降。
下面将详细描述当所述车辆的等待时长小于预设时长时，根据所述车辆与前方路口的距离、以及所述车辆的行驶信息，得出切换判决结果的方法。
当车辆与前方路口的距离小于设定距离，且所述车辆的行驶信息表征所述车辆需要通过前方路口进行非掉头行驶时，可以在初始目标小区集合中，选择与通过前方路口后的车辆行驶轨迹相符合的小区，作为待切换到的目标小区。
可以理解的是，车辆通过前方路口的行驶轨迹包括但不限于：车辆可以通过前方路口直行、车辆通过前方路口掉头行驶、车辆通过前方路口进行非掉头拐弯行驶(例如，左拐和右拐)。这里，车辆可以通过前方路口直行，或者，车辆通过前方路口进行非掉头拐弯行驶时，可以认为车辆需要通过前方路口进行非掉头行驶。
在确定车辆需要通过前方路口进行非掉头行驶时，如果一个邻区的覆盖范围与通过前方路口后的车辆行驶轨迹存在重叠，则可以认为该邻区与通过前方路口后的车辆行驶轨迹相符合；示例性地，可以在与通过前方路口后的车辆行驶轨迹相符合的小区中，选择覆盖范围与通过前方路口后的车辆行驶轨迹的重叠部分最多的小区，作为待切换到的目标小区。
可以看出，在车辆需要通过前方路口进行非掉头行驶时，不是仅从通信质量的角度考虑目标小区的选择，而时将车辆的行驶轨迹作为选择目标小区的考虑因素，如此，可以根据车辆运动的规律，选择合适的目标小区，避免选择错误的目标小区带来的冗余切换、以及冗余切换带来的业务质量下降。
当车辆与前方路口的距离小于设定距离，且车辆的行驶信息表征车辆需要通过前方路口掉头行驶时，说明车辆通过前方路口后的车辆行驶轨迹还处在当前服务小区中，这样，确定不发起小区切换，保持当前接入V2X用户设备的服务小区，从而可以避免选择错误的目标 小区带来的冗余切换、以及冗余切换带来的业务质量下降。
当所述车辆与前方路口的距离大于或等于设定距离时，确定对V2X用户设备发起小区切换，并且可以根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区。例如，可以在初始目标小区集合中，任意选择一个小区作为待切换到的目标小区；或者，可以在初始目标小区集合中，选择无线信号质量最高的小区或负荷最小的小区作为待切换到的目标小区。
下面将进行详细描述当V2X用户设备的服务小区的负荷大于或等于设定负荷门限时，根据V2X用户设备所处在的车辆的交通信息，确定切换判决结果的方法。
根据本公开的另一实施，可以判断V2X用户设备的服务小区是否为拥塞小区，得出判断结果。例如，当V2X用户设备的服务小区的负荷超过设定负荷门限时，判断结果为：V2X用户设备的服务小区为拥塞小区；当V2X用户设备的服务小区的负荷未超过设定负荷门限时，判断结果为：V2X用户设备的服务小区不是拥塞小区。
可以获取所述车辆的前方路口的交通信号灯信息，根据所述交通信号灯信息确定所述车辆的等待时长。根据所述车辆的地理位置信息和所述道路地图信息，确定所述车辆与前方路口的距离。根据所述判断结果、所述车辆的等待时长、所述车辆与前方路口的距离，得出切换判决结果。
当V2X用户设备的服务小区为非拥塞小区时，不发起小区切换。
当V2X用户设备的服务小区为拥塞小区时，可以根据所述车辆的等待时长、以及所述车辆与前方路口的距离，确定切换判决结果。例如，当车辆的等待时长大于或等于设定时长时，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区；当车辆的等待时长小于设定时长时，根据所述车辆与前方路口的距离，确定切换判决结果。当车辆与前方路口的距离大于或等于设定距离时，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区；当车辆与前方路口的距离小于设定距离时，确定不发起小区切换。
也就是说，如果V2X用户设备的服务小区为拥塞小区，且所述车辆与前方路口的距离小于设定距离，且所述车辆的等待时长小于设定时长，说明车辆在较短时间内会通过前方路口，也就是说，只需要在保持接入所述V2X用户设备的服务小区时，车辆等待较短的时间就可以通过前方路口，如此，能够避免根据对拥塞小区的盲目切换，即，可以避免选择错误的目标小区带来的冗余切换以及冗余切换带来的业务质量下降。
实际应用中，步骤101至步骤102可以由V2X业务部署场景中的边缘计算节点实现，边缘计算节点可以包括存储器、处理器等设备。边缘计算节点可以为用户设备提供低时延、高可靠的通信服务。具体地，可以在在网络的边缘，靠近移动用户的位置上提供信息技术服务环境和云计算能力，并将内容分发推送到靠近用户侧(如基站)，将应用、服务和内容都部署在高度分布的环境中，从而可以更好的支持5G网络中低时延和高带宽的业务要求。使用边缘计算技术结合传统的无线方法综合可以更优化的解决V2X通信业务的切换问题。
根据本公开的实施例，在确定切换判决结果后，可以向V2X用户设备的服务小区对应的基站发送切换指示信息，所述切换指示信息用于指示是否对所述V2X用户设备发起小区切换、以及确定发起小区切换时待切换到的目标小区。基站在接收到切换指示信息后，可以根据切换指示信息确定是否执行小区切换，在确定进行切换时，将V2X用户设备的服务小区切换到目标小区。
还可以向与所述V2X用户设备的服务小区对应的基站发送所述切换指示信息适用的时间范围。基站在接收到切换指示信息和切换指示信息适用的时间范围后，可以判断当前时间是否处在切换指示信息适用的时间范围内，如果当前时间处在切换指示信息适用的时间范围，则基站可以根据切换指示信息进行操作，如果当前时间已经超出切换指示信息适用的时间范围，则基站可以忽略切换指示信息。
切换指示信息适用的时间范围可以根据车辆的前方路口的交通信号灯时间而定，例如，切换指示信息适用的时间范围可以是从当前时间到下一次红灯时间的时间段。
根据本公开的实施例，基站可以是一体化基站、转控(C\U)分离模式的中心单元(CU)或C\U分离模式的分布单元(DU)等。
下面从V2X业务部署场景中多个设备的角度具体说明本公开的实现方式。
图2为根据本公开的实施例的小区切换方法的信令图。如图2所示，边缘计算节点可以分别连接基站，交通灯信息服务器和道路信息服务器。交通灯信息服务器用于存储道路交通灯信息，道路信息服务器用于存储道路地图信息。边缘计算节点与交通灯信息服务器和道路信息服务器的连接方式可以是直接连接方式，也可以是间接连接方式。
参照图2，小区切换方法的流程可以包括步骤200到步骤230。
在步骤200，边缘计算节点从交通灯信息服务器获取V2X用户设备所处在的车辆所在道路区域的交通信号灯信息，并从道路信息服务器获取道路地图信息。
另外，V2X用户设备还可以将车辆的行驶信息上报至边缘计算节点。边缘计算节点接收到的信息均可以用于作为小区切换判决的依据。
在步骤210，基站向边缘计算节点发送V2X用户设备的通信质量信息。
基站可以监控V2X用户设备的服务小区的通信参数，以此来预测V2X通信业务的服务质量(Quality of Service，QoS)是否会改变。当V2X用户设备的服务小区的无线信号质量下降(即V2X用户设备的无线通信质量下降)，或者V2X用户设备的服务小区为拥塞小区，则可以认为V2X通信业务的QoS将会下降，此时，基站可以将与V2X通信业务相关的无线信息(即，V2X用户设备的通信质量信息)发送给边缘计算节点。
在步骤220，边缘计算节点根据接收到的信息，进行小区切换判决。
边缘计算节点进行小区切换判决的实现方式已经在前述记载的内容中作出说明，这里不再赘述。
在步骤230，边缘计算节点向基站发送切换指示信息。
切换指示信息可以指示基站是否执行小区切换，切换指示信息在指示基站执行小区切换时，还可以指示V2X用户设备待切换到的目标小区。
在步骤240，基站在接收到用于指示进行小区切换的切换指示信息后，根据切换指示信息执行小区切换。
下面参照图3到图5详细说明根据本公开的实施例的小区切换方法。
图3示出了根据本公开的实施例的小区切换判决方法的应用场景。如图3所示，车辆上的V2X用户设备当前接入小区1，车辆直行方向有小区2覆盖，车辆左拐方向依次有小区2和小区3覆盖，十字路口区域处于小区1、小区2和小区3的共同的覆盖范围内。
在十字路口附近可以设置上述记载的边缘计算节点，当车辆进行十字路口的左拐时，小区1的无线通信质量开始下降，当小区1的无线信号质量参数的值小于设定门限时，无线网络系统可以进行切换判决，为车辆上的V2X用户设备选择合适的切换目标小区。
可以通过上述小区切换判决方法对V2X用户设备进行小区切换判决。
例如，边缘计算节点实时更新最新的道路信息和交通信号灯信息，当车辆接近路口时，V2X用户设备可以检测服务小区和各个邻区的无线信号质量参数，并向基站上报检测到的无线信号质量参数。基站确定V2X用户设备的当前服务小区(小区1)无线信号质量参数的值小于设定门限时，说明可能会影响V2X通信业务的QoS。此时，基站可以向边缘计算节点发送消息，以指示边缘计算节点开始进行针对V2X用户设备的小区切换判决，并且，基站向边缘计算节点发送的消息中还可以包括V2X用户设备的当前服务小区的无线信号质量参数、V2X用户设备的当前服务小区的邻区的无线信号质量参数和V2X用户设备的地理位置信息。这里，V2X用户设备的当前服务小区的各邻区中，小区2和小区3的无线信号质量参数的值均大于所述设定门限，且小区2的无线信号质量参数的值大于小区3的无线信号质量参数的值。
边缘计算节点根据获取到的信息(包括V2X用户设备的通信质量信息和V2X用户设备所处在的车辆的交通信息)，进行切换判决。边缘计算节点使用V2X用户设备的地理位置信息，将V2X用户设备所处在的车辆的地理位置映射到实时道路地图上，当根据映射结果计算该车辆确定该车辆位于十字路口区域时，需要进一步结合该十字路口的交通信号灯信息进行切换判决。当前十字路口区域朝向车辆的绿灯发亮时，或者，十字路口区域朝向车辆的红灯发亮，且该红灯的剩余时间小于设定时长(例如5s)时，需要进一步结合车辆行驶方向进行切换判决。确定车辆计划进行左拐行驶时，按照各小区的覆盖范围以及左拐后的道路所在的无线覆盖区域进行映射，确定左拐后的道路(或左拐后的行驶轨迹)与小区3的覆盖范围存在最大的重叠部分，从而确定小区3是与车辆的行驶轨迹相符合的小区，因而，可以选择小区3作为切换目标小区。当前十字路口区域朝向车辆的红灯发亮，且该红灯的剩余时间大于设定时长时，则可以选择无线信号质量参数最大的小区(即小区2)作为切换目标小区。
边缘计算节点向基站发送切换指示信息，在切换指示信息中携带得出的切换判决结果。也就是说，切换指示信息用于指示基站按照得出的切换判决结果进行操作，另外，边缘计算节点还可以向基站发送切换指示信息适用的时间范围，例如，切换指示信息适用的时间范围可以是：从当前时间到下一次红灯时间的时间段。
基站可以根据接收到的切换指示信息和切换指示信息适用的时间范围，执行相应的操作。具体地，如果基站接收到切换指示信息时，当前时间已经不处在切换指示信息适用的时间范围时，或者，预计切换执行完毕时已经不处在切换指示信息适用的时间范围时，可以忽略切换指示信息，否则，可以按照切换指示信息执行小区切换，如果基站忽略切换指示信息，则基站可以向边缘计算节点发送切换判决请求，以请求边缘计算节点进行切换判决，或者，基站也可以自行进行切换判决。
图4示出了根据本公开的实施例的小区切换判决方法的另一应用场景。如图4所示，车辆上的V2X用户设备当前接入小区1，当前 时刻小区1为拥塞小区，小区1和小区2具有相同或相近的覆盖范围，且车辆上的V2X用户设备同时处于小区1和小区2的覆盖范围内，V-ue1是队头车辆，靠近路口，V-ue2是队尾车辆，距离路口很远。
路口附近可以设置上述记载的边缘计算节点。无线网络系统确定小区1为拥塞小区时，可以启动拥塞控制，计划将部分的V2X用户设备从小区1切换到其他小区，此时，无线网络系统开始启动切换判决，选择合适的V2X用户设备作为切换对象。
例如，边缘计算节点实时更新最新的道路信息和交通信号灯信息。各小区(包括小区1、小区2和小区3)对应的基站分别向边缘计算节点发送当前对应的小区的无线信号质量参数、对应的小区的拥塞指示信息、对应的小区内的V2X用户设备的列表、对应的小区内V2X用户设备的地理位置信息。小区1的拥塞指示信息指示小区1为拥塞小区，小区2的拥塞指示信息指示小区2不是拥塞小区，小区3的拥塞指示信息指示小区3不是拥塞小区。
边缘计算节点根据获取到的信息(各小区的无线信号质量参数、拥塞指示信息、V2X用户设备的列表和V2X用户设备的地理位置信息)，进行切换判决。
边缘计算节点将小区1的V2X用户设备的列表作为切换候选的用户设备列表。边缘计算节点使用V2X用户设备的地理位置信息，将切换候选的用户设备列表中的V2X用户设备的车辆的地理位置映射到实时道路地图上，并根据映射结果，计算各车辆与路口的距离。如果车辆与路口的距离小于设定距离，则认为车辆靠近路口位置，需要进一步结合路口的交通信号灯信息进行切换判决。
如果当前路口区域朝向车辆的绿灯发亮时，或者，十字路口区域朝向车辆的红灯发亮且该红灯的剩余时间小于设定时长(例如5s)，则认为靠近路口的车辆即将通过十字路口，系统无需对其发起小区切换，因此将车辆中的V2X用户设备从切换候选的用户设备列表中排除。即，在当前时刻，不对车辆中的V2X用户设备进行小区切换，保持接入原服务小区。如果当前路口区域朝向车辆的红灯发亮，且该红灯的剩余时间大于设定时长时，则认为车辆还需要在路口区域等待较长时 间，可以将车辆中的V2X用户设备切换至其他小区，以降低V2X用户设备的当前服务小区的负荷。
如果车辆与路口的距离大于设定距离，则认为车辆还需要在路口区域等待较长时间，可以将车辆中的V2X用户设备切换至其他小区，以降低V2X用户设备的当前服务小区的负荷。也就是说，可根据车辆与路口的距离，在切换候选的用户设备列表中，筛选出当前需要进行小区切换的V2X用户设备。在选择需要被切换到其他小区的用户设备时，优选远离路口的车辆，因为这些车辆需要比较长的时间才能离开拥堵区域，一段时间内将无法自动降低小区1的无线拥堵情况。
参照图4，因为车辆V-ue1排队靠近十字路口，而且红灯很快结束，该车辆即将离开小区1，无需对车辆V-ue1中的V2X用户设备主动发起拥塞导致的切换动作，而车辆V-ue2距离路口很远，短时间不能主动快速离开，所以选择将车辆V-ue2中的V2X用户设备主动切换出小区1，以此缓解小区1的拥堵情况。
边缘计算节点向基站发送切换指示信息，切换指示信息指示当前需要进行小区切换的V2X用户设备。
基站收到切换指示信息后，可以对车辆V-ue2中的V2X用户设备，执行小区切换。另外，边缘计算节点还可以向基站发送切换指示信息适用的时间范围，例如，切换指示信息适用的时间范围可以是从当前时间到下一次红灯时间的时间段。
基站可以根据接收到的切换指示信息和切换指示信息适用的时间范围，执行相应的操作。具体地，如果基站接收到切换指示信息时，当前时间已经不处在切换指示信息适用的时间范围时，或者，预计切换执行完毕时已经不处在切换指示信息适用的时间范围时，可以忽略切换指示信息，否则，可以按照切换指示信息执行小区切换。如果基站忽略切换指示信息，则基站可以向边缘计算节点发送切换判决请求，以请求边缘计算节点进行切换判决，或者，基站也可以自行进行切换判决。
图5示出了根据本公开的实施例的小区切换方法的另一应用场景。如图5所示，车辆上的V2X用户设备当前接入小区1，车辆直行 方向有小区2覆盖，路口区域处于小区1和小区2的共同的覆盖范围内。
在路口附近部署上述记载的边缘计算节点，小区1和小区2所在基站均接入该边缘计算节点。同时，该边缘计算节点也可以接收道路的交通信号灯信息，并且可以从云端或者本地交通管理部门服务器获取该路口的道路信息。
当车辆从当前位置开始打算行驶到十字路口进行掉头时，小区1的无线信号质量开始下降，无线网络系统开始启动切换判决，为其选择合适的切换目标小区。
边缘计算节点实时更新最新的道路信息和交通信号灯信息；当车辆接近路口时，V2X用户设备可以检测服务小区和各个邻区的无线信号质量参数，并向基站上报检测到的无线信号质量参数。基站确定V2X用户设备的当前服务小区(小区1)无线信号质量参数的值小于设定门限时，说明可能会影响V2X通信业务的QoS，此时，基站可以向边缘计算节点发送消息，以指示边缘计算节点开始进行针对V2X用户设备的切换判决，并且，基站向边缘计算节点发送的消息中还可以携带V2X用户设备的当前服务小区的无线信号质量参数、V2X用户设备的当前服务小区的各邻区的无线信号质量参数和V2X用户设备的地理位置信息，其中，小区2的无线信号质量参数的值大于设定门限。
边缘计算节点根据获取到的信息(包括V2X用户设备的通信质量信息和V2X用户设备所处在的车辆的交通信息)，进行小区切换判决。具体地，边缘计算节点使用V2X用户设备的地理位置信息，将V2X用户设备所处在的车辆的地理位置映射到实时道路地图上，确定该车辆位于十字路口区域时，需要进一步结合该十字路口的交通信号灯信息进行切换判决。当前十字路口区域朝向车辆的绿灯发亮时，或者，十字路口区域朝向车辆的红灯发亮，且该红灯的剩余时间小于设定时长(例如5s)时，需要进一步结合车辆行驶方向进行小区切换判决。当确定车辆计划通过路口进行掉头行驶时，认为车辆的V2X用户设备一定时间内均处于小区1的覆盖范围内，虽然小区1的无线 信号质量可能会发生变换，但是不对车辆中的V2X用户设备执行小区切换，保持接入当前的服务小区。当前十字路口区域朝向车辆的红灯发亮，且该红灯的剩余时间大于设定时长时，则可以选择无线信号质量参数最大的小区(如小区2)作为切换目标小区。
边缘计算节点向基站发送切换指示信息，在切换指示信息中包括确定的小区切换判决结果，也就是说，切换指示信息用于指示基站按照得出的切换判决结果执行操作。另外，边缘计算节点还可以向基站发送切换指示信息适用的时间范围，例如，切换指示信息适用的时间范围可以是从当前时间到下一次红灯时间的时间段。
基站可以根据接收到的切换指示信息和切换指示信息适用的时间范围，执行相应的操作。具体地，如果基站接收到切换指示信息时，当前时间已经不处在切换指示信息适用的时间范围时，或者，预计切换执行完毕时已经不处在切换指示信息适用的时间范围时，可以忽略切换指示信息，否则，可以按照切换指示信息执行小区切换。如果基站忽略切换指示信息，则基站可以向边缘计算节点发送切换判决请求，以请求边缘计算节点进行切换判决，或者，基站也可以自行进行切换判决。
图6为根据本公开的实施例的小区切换判决装置的组成结构示意图。如图6所示，所述装置包括获取模块601和判决模块602。
获取模块601用于获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息。
判决模块602用于根据V2X用户设备的通信质量信息满足预设的小区切换条件时，根据V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及发起小区切换时待切换到的目标小区。
判决模块602确定判决结果的方法已经参照图1到图5进行了详细描述，在此将不再进行重复描述。
上述获取模块601和判决模块602均可由位于边缘计算节点中的中央处理器(Central Processing Unit，CPU)、微处理器(Micro Processor Unit，MPU)、数字信号处理器(Digital Signal Processor， DSP)、或现场可编程门阵列(Field Programmable Gate Array，FPGA)等实现。
另外，在本实施例中的各功能模块可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
所述集成的单元如果以软件功能模块的形式实现并非作为独立的产品进行销售或使用时，可以存储在一个计算机可读取存储介质中，基于这样的理解，本实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或processor(处理器)执行本实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
具体来讲，本实施例中的一种小区切换判决方法对应的计算机程序指令可以被存储在光盘，硬盘，U盘等存储介质上，当存储介质中的与一种小区切换判决方法对应的计算机程序指令被一电子设备读取或被执行时，实现前述实施例的任意一种小区切换判决方法的步骤。
图7为根据本公开的实施例的小区切换判决设备的硬件结构示意图。
参见图7，小区切换判决设备70可以包括：存储器71、处理器72和总线73。
所述总线73用于连接所述存储器71、处理器72并用于在存储器71和处理器72之间传输通信数据。
所述存储器71用于存储计算机程序和数据。
所述处理器72用于执行所述存储器中存储的计算机程序，以实现前述实施例的任意一种小区切换判决方法的步骤。
在实际应用中，上述存储器71可以是易失性存储器(volatile memory)，例如RAM；或者非易失性存储器(non-volatile memory)，例如ROM，快闪存储器(flash memory)，硬盘(Hard Disk Drive，HDD)或固态硬盘(Solid-State Drive，SSD)；或者上述种类的存储器的组合，并向处理器72提供指令和数据。
上述处理器72可以为特定用途集成电路(Application Specific Integrated Circuit，ASIC)、DSP、数字信号处理装置(Digital Signal Processing Device，DSPD)、可编程逻辑装置(Programmable Logic Device，PLD)、FPGA、CPU、控制器、微控制器、微处理器中的至少一种。可以理解地，对于不同的设备，用于实现上述处理器功能的电子器件还可以为其它，本公开实施例不作具体限定。
本公开实施例还提出了一种边缘计算节点，该边缘计算节点包括上述记载的任意一种小区切换判决设备。
本领域内的技术人员应明白，本公开的实施例可提供为方法、系统、或计算机程序产品。因此，本公开可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计 算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本公开的较佳实施例而已，并非用于限定本公开的保护范围。

Claims (15)

  1. 一种小区切换判决方法，所述方法包括：
    获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息；
    根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及确定发起小区切换时待切换到的目标小区。
  2. 根据权利要求1所述的方法，其中，所述V2X用户设备的通信质量信息包括以下至少一项：V2X用户设备的服务小区的通信参数、V2X用户设备的服务小区的邻区的通信参数，其中，所述通信参数包括无线信号质量和负荷中的至少一项；
    所述V2X用户设备所处在的车辆的交通信息包括：所述车辆的地理位置信息、道路地图信息、所述车辆所在道路区域的交通信号灯信息和所述车辆的行驶信息。
  3. 根据权利要求2所述的方法，其中，所述根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，包括：
    响应于所述V2X用户设备的服务小区的无线信号质量小于设定无线信号质量门限，根据所述V2X用户设备所处在的交通信息确定切换判决结果。
  4. 根据权利要求3所述的方法，其中，响应于所述V2X用户设备的服务小区的无线信号质量小于设定无线信号质量门限，根据所述V2X用户设备所处在的交通信息确定切换判决结果，包括：
    根据所述车辆所在道路区域的交通信号灯信息，确定所述车辆通过所述车辆的前方路口前的等待时长；
    根据所述车辆的地理位置信息和所述道路地图信息，确定所述 车辆与所述前方路口的距离；
    响应于所述等待时长大于或等于设定时长，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区；
    响应于所述车辆的等待时长小于设定时长，根据所述车辆与所述前方路口的距离、以及所述车辆的行驶信息，确定切换判决结果。
  5. 根据权利要求4所述的方法，其中，响应于所述车辆的等待时长小于设定时长，根据所述车辆与前方路口的距离、以及所述车辆的行驶信息，确定切换判决结果，包括：
    响应于所述车辆与前方路口的距离小于设定距离，且所述车辆行驶轨迹表征所述车辆需要通过前方路口进行非掉头行驶时，确定发起小区切换，并选择与通过前方路口后的车辆行驶轨迹相符合的小区，作为待切换到的目标小区；
    响应于所述车辆与前方路口的距离小于设定距离，且所述车辆行驶轨迹表征所述车辆需要通过前方路口掉头，确定不发起小区切换；
    响应于所述车辆与前方路口的距离大于或等于设定距离，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区。
  6. 根据权利要求2所述的方法，其中，所述根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，包括：
    响应于所述V2X用户设备的服务小区的负荷大于或等于所述服务小区的设定负荷门限，根据所述V2X用户设备所处在的车辆的交通信息确定切换判决结果。
  7. 根据权利要求6所述的方法，其中，响应于所述V2X用户设备的服务小区的负荷大于或等于所述服务小区的设定负荷门限，根据所述V2X用户设备所处在的车辆的交通信息确定切换判决结果，包括：
    根据所述车辆所在道路区域的交通信号灯信息，确定所述车辆 通过所述车辆的前方路口前的等待时长；
    根据所述车辆的地理位置信息和所述道路地图信息，确定所述车辆与所述前方路口的距离；
    响应于所述等待时长大于或等于设定时长，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区；
    响应于所述等待时长小于所述设定时长，根据所述车辆与前方路口的距离，确定切换判决结果。
  8. 根据权利要求7所述的方法，其中，响应于所述等待时长小于所述设定时长，根据所述车辆与前方路口的距离，确定切换判决结果，包括：
    响应于所述车辆与前方路口的距离大于或等于设定距离，确定发起小区切换，并根据所述V2X用户设备的通信质量信息，确定待切换到的目标小区；
    响应于所述车辆与前方路口的距离小于设定距离，确定不发起小区切换。
  9. 根据权利要求1至8任一项所述的方法，还包括：在确定切换判决结果后，向与所述V2X用户设备的服务小区对应的基站发送切换指示信息，所述切换指示信息包括所述切换判决结果。
  10. 根据权利要求9所述的方法，还包括：向所述基站发送所述切换指示信息适用的时间范围。
  11. 根据权利要求10所述的方法，还包括：
    响应于所述基站接收到所述切换指示信息的时间在所述时间范围内，根据所述切换指示信息进行操作；
    响应于所述基站接收到所述切换指示信息的时间超出所述时间范围，忽略所述切换指示信息。
  12. 一种小区切换判决装置，包括：获取模块和判决模块，其中，
    获取模块，用于获取V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息；
    判决模块，用于根据所述V2X用户设备的通信质量信息和所述V2X用户设备所处在的车辆的交通信息，确定切换判决结果，所述切换判决结果表示是否发起小区切换、以及确定发起小区切换时待切换到的目标小区。
  13. 一种小区切换判决设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，
    所述处理器运行所述计算机程序时，执行根据权利要求1至12任一项所述的小区切换判决方法。
  14. 一种边缘计算节点，包括权利要求14所述的小区切换判决设备。
  15. 一种计算机存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时，所述处理器执行根据权利要求1至12任一项所述的小区切换判决方法。
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