WO2020063404A1 - 一种负载均衡方法及装置 - Google Patents

一种负载均衡方法及装置 Download PDF

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Publication number
WO2020063404A1
WO2020063404A1 PCT/CN2019/106247 CN2019106247W WO2020063404A1 WO 2020063404 A1 WO2020063404 A1 WO 2020063404A1 CN 2019106247 W CN2019106247 W CN 2019106247W WO 2020063404 A1 WO2020063404 A1 WO 2020063404A1
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Prior art keywords
load
access network
network node
radio access
information
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PCT/CN2019/106247
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English (en)
French (fr)
Inventor
石小丽
奥鲁佛松亨里克
彭文杰
曾清海
韩锋
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19867544.9A priority Critical patent/EP3852434A4/en
Publication of WO2020063404A1 publication Critical patent/WO2020063404A1/zh
Priority to US17/215,403 priority patent/US11917481B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0862—Load balancing or load distribution among access entities between base stations of same hierarchy level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a load balancing method and device.
  • the load balancing function (load balancing) defined by LTE means that eNBs automatically adjust mobility-related parameters by exchanging load information between eNBs to achieve uniform distribution of services or terminal equipment between different eNBs.
  • a supplementary uplink (SUL) is introduced, that is, there is a downlink (DL) carrier between a network device (such as a base station, sending and receiving point, etc.) and a terminal device.
  • the two uplink carriers are a normal uplink (UL) carrier and a SUL carrier, respectively.
  • a SUL threshold is also introduced, that is, when the terminal device initially randomly accesses, the terminal device compares the measured signal strength with the UL threshold and the SUL threshold to determine whether to use UL or SUL with network equipment.
  • Upstream transmission In a handover scenario, a network device may instruct a terminal device to use UL and / or SUL after switching to a new cell through radio resource control (RRC) signaling.
  • RRC radio resource control
  • V2X vehicle to everything
  • Applications of V2X can include vehicles and vehicles, vehicle and roadside infrastructure, vehicles and pedestrians, and vehicles and application servers.
  • the application of V2X can improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and on-board entertainment information.
  • the network slice can be a complete end-to-end network including terminal equipment, access network, transmission network, core network, and application server, which can provide complete communication services and have certain network capabilities.
  • the network slice can also be the above terminal device , Access network, transmission network, core network, and any combination of application servers.
  • the existing load balancing method only considers the overall load situation of the base station (or cell), and has a coarse granularity, which is not suitable for the NR system.
  • the embodiments of the present application provide a load balancing method and device, which are used to implement fine-grained load balancing.
  • an embodiment of the present application provides a load balancing method, including:
  • the first radio access network node receives a first message from a second radio access network node, and the first message includes load information of a first load type of the second radio network node, and the first load
  • the type includes any one or more of the following: a network slice load, a V2X load from a car, and a supplemental uplink SUL load; and the first radio access network node obtains load information of the first load type.
  • the first radio access network node obtains the load information of the first load type.
  • the first radio access network node obtains the load information of the first load type of the second radio access network node.
  • Processing that is, load balancing. Since the load balancing method provided in the embodiment of the present application considers the respective loads of the network slice load, V2X load, and UL / SUL load, compared with the existing load balancing method, the load information considered is finer-grained load information. It can perform load balancing for the load situation of a certain network slice (group) or the load of V2X services or the load situation of UL / SUL. It can be applied to the load balancing requirements of the NR system or other systems in the future, which helps to improve Success rate of load balancing and system efficiency.
  • the first radio access network node sends first information to the second radio access network node, and the first information is used to obtain the second radio access network node.
  • Load information for the first load type may first send a request to obtain the load information of the first load type to the second radio access network node. After receiving the request, the second radio access network node Load information of a load type is sent to the first radio access network node.
  • the first radio access network node may not send the first request, and the second radio access network node may actively report the load information of the first load type to the first radio access network node according to the protocol.
  • the first information further includes a sending period of the load information of the first load type; or the first information further includes sending of the load information of the first load type. Trigger conditions.
  • the load information of the network slice load includes: an identifier of a single network slice and a load condition of the single network slice, and / or an identifier of a network slice group and a load of the network slice group Situation; and / or, the load information of the V2X load includes V2X frequency information, and the load information of the V2X load further includes any one or more of the following: V2X corresponding to the V2X frequency information on an air interface Load conditions, load conditions of V2X services corresponding to the V2X frequency information on the side link, load conditions of services with the same quality of service QoS in V2X; and / or, the supplementary uplink SUL load information includes : The frequency of the supplementary uplink and the load of the supplementary uplink.
  • the load information includes measurement results of any one or more of the following measurement objects: the number of access terminal devices, hardware load, transmission load, reference signal received power measurement report, and wireless resources. Status, ABS status information, available resources, channel status information report, access cell control information.
  • the measurement result includes a measurement value and / or overload indication information.
  • the processing performed by the first radio access network node according to the load condition of the first type includes: the first radio access network node sends the second radio access network to the second radio access network.
  • the node sends a second request, where the second request is used to request that a terminal device served by the first radio access network node be switched to the second radio access network node, and the second request includes the first Indication information of a load type, and the indication information of the first load type is used to indicate a reason for the handover.
  • the first load type indication information is added to the request, so that the second radio access network node is configured according to the second radio
  • the current load information of the first load type of the access network node determines whether to receive the terminal equipment from the first wireless access network node, which is helpful to improve the handover success rate.
  • the first radio access network node is a centralized unit CU, and the second radio access network node is a distributed unit DU; or the first radio access network node Is a DU, and the second radio access network node is a CU; the CU has one or more of the following protocol layers: a packet data convergence protocol, a radio resource control, and a service data adaptation protocol; and the DU has one of the following Or multiple protocol layers: a wireless link layer control protocol, a media access control layer, and a physical layer; the CU and the DU belong to the same wireless base station.
  • the load information of the first load type of the DU includes one or more of the following: the radio resource status of the first load type, the almost blank pointer ABS status of the first load type, and the first The channel status information report of the load type, and the cell access control information of the first load type; or the load information of the first load type of the CU includes one or more of the following: a hardware load of the first load type, a first Load type transmission load, reference signal received power measurement report of the first load type.
  • the first radio access network node is a control plane centralized unit radio access network node CU-CP
  • the second radio access network node is a user plane centralized unit radio access network.
  • Node CU-UP; or the first radio access network node is a user plane centralized unit radio access network node CU-UP
  • the second radio access network node is a control plane centralized unit radio access network node CU -CP; the CU-CP and CU-UP belong to the same wireless base station.
  • the load information of the first load type of the CU-UP includes a hardware load of the first load type and / or a transmission load of the first load type; or, the CU -The load information of the first load type of the CP includes one or more of the following: a hardware load of the first load type, a transmission load of the first load type, and a reference signal received power measurement of the first load type report.
  • an embodiment of the present application provides a load balancing method, including:
  • the second radio access network node sends a first message to the first radio access network node, where the first message includes load information of a first load type, and the first load type includes one or more of the following: a network Slicing load, V2X load of the car, and supplementary uplink SUL load.
  • the method further includes: the second radio access network node receives first information from the first radio access network node, and the first information is used to obtain the first information Load information of the first load type of the second radio access network node.
  • the first information further includes a sending period of the load information of the first load type; or the first information further includes sending of the load information of the first load type. Trigger conditions.
  • the load information of the network slice load includes an identifier of a single network slice and a load condition of the single network slice, and / or a description of a network slice group and a load condition of the network slice group. ;
  • the load information of the V2X load includes V2X frequency information, and the load information of the V2X load further includes any one or more of the following: a load of the V2X on the air interface corresponding to the V2X frequency information Situation, load situation of a V2X service corresponding to the V2X frequency information on a side link, load situation of a service with the same quality of service QoS in V2X; and / or, the supplementary uplink SUL load information includes: The frequency of the supplemental uplink and the load of the supplemental uplink.
  • the load condition includes measurement results of any one or more of the following measurement objects: the number of access terminal devices, hardware load, transmission load, reference signal received power measurement report, and wireless resources. Status, ABS status information, available resources, channel status information report, access cell control information.
  • the measurement result includes a measurement value and / or overload indication information.
  • the method further includes: the second radio access network node receives a request from the first radio access network node, and the request is used to request that the first radio access network
  • the terminal device served by the network node switches to the second radio access network node, and the request includes the indication information of the first load type, and the indication information of the first load type is used to indicate the handover. the reason.
  • the first radio access network node is a centralized unit CU, and the second radio access network node is a distributed unit DU; or the first radio access network node Is DU, and the second radio access network node is C.
  • the CU has one or more of the following protocol layers: a packet data convergence protocol, a radio resource control, and a service data adaptation protocol;
  • the DU has one or more of the following protocol layers: a radio link layer control protocol, and media access Control layer and physical layer; the CU and the DU belong to the same wireless base station.
  • the load information of the first load type of the DU includes one or more of the following: the radio resource status of the first load type, the almost blank pointer ABS status of the first load type, and the first The channel status information report of the load type, and the cell access control information of the first load type; or the load information of the first load type of the CU includes one or more of the following: a hardware load of the first load type, a first Load type transmission load, reference signal received power measurement report of the first load type.
  • the first radio access network node is a control plane centralized unit radio access network node CU-CP
  • the second radio access network node is a user plane centralized unit radio access network.
  • Node CU-UP; or the first radio access network node is a user plane centralized unit radio access network node CU-UP
  • the second radio access network node is a control plane centralized unit radio access network node CU -CP; the CU-CP and the CU-UP belong to the same wireless base station.
  • the load information of the first load type of the CU-UP includes a hardware load of the first load type and / or a transmission load of the first load type; or, the CU -The load information of the first load type of the CP includes one or more of the following: a hardware load of the first load type, a transmission load of the first load type, and a reference signal received power measurement of the first load type report.
  • an embodiment of the present application provides a load balancing method, including:
  • the first radio access network node sends a second message to the second radio access network node, where the second message is used to request the second radio access network node to modify the first of the second radio access network node.
  • a mobility parameter of a load type includes one or more of the following: a network slice load, a V2X load from a car association, and a supplemental uplink SUL load; and the second radio access network node is based on the A second message modifies a mobility parameter of the second radio access network node, and sends a response to the first radio access network node.
  • the mobility parameter information includes handover trigger change information.
  • the message includes: mobility parameter information of a first load type requesting the second radio access network node to modify.
  • the response includes indication information used to indicate that the second radio access network node successfully modifies a mobility parameter; or the response includes the second radio access network Mobility parameter modification range of the first load type of the node.
  • the network slice load includes a load of a single network slice and / or a load of a network slice group; and / or, the V2X load includes one or more of the following: V2X services on an air interface Load, the load of the V2X service on the side link, the load of each frequency in the V2X service, the load of the air interface service at each frequency point of V2X, the load of the side link service at each frequency point of V2X, and the same quality of service in QoS Business load.
  • an embodiment of the present application provides a load balancing device, which is configured to execute the foregoing first aspect and any possible implementation method of the first aspect.
  • the load balancing apparatus may include a unit for executing the first aspect and any possible implementation method of the first aspect.
  • an embodiment of the present application provides a load balancing device, which is configured to execute the foregoing second aspect and any possible implementation method of the second aspect.
  • the load balancing apparatus may include a unit for executing the second aspect and any one of the possible implementation methods of the second aspect.
  • an embodiment of the present application provides a communication system including the device according to the fourth aspect and the device according to the fifth aspect.
  • an embodiment of the present application provides a load balancing device, configured to execute the third aspect and any possible implementation method of the third aspect.
  • the load balancing apparatus may include a unit for executing the third aspect and any one of the possible implementation methods of the third aspect.
  • an embodiment of the present application provides a load balancing device, and the device may be a first radio access network node in any one of the possible implementation manners of the first aspect, or may be provided in the first A chip in a radio access network node.
  • the device includes a processor coupled to a memory and a communication interface, and can be used to execute instructions in the memory, and implement any one of the possible implementation methods of the first aspect through the communication interface.
  • an embodiment of the present application provides a load balancing device.
  • the device may be a second radio access network node in any one of the possible implementation methods of the second aspect, or may be provided in a second radio access network node.
  • the device includes a processor coupled to a memory and a communication interface, and can be used to execute instructions in the memory, and implement any one of the possible implementation methods of the second aspect through the communication interface.
  • an embodiment of the present application provides a communication system, including the device according to the sixth aspect and the device according to the seventh aspect.
  • an embodiment of the present application provides a load balancing device.
  • the device may be a first radio access network node in any one of the possible manners in the third aspect, or may be provided in the first radio access network node.
  • the device includes a processor coupled to a memory and a communication interface, and can be used to execute instructions in the memory, and implement any one of the possible implementation methods of the third aspect through the communication interface.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and when the instructions are run on a computer, the computer executes the operations as described in the first aspect to the third aspect.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method according to any one of the first aspect to the third aspect.
  • FIG. 1 is a schematic diagram of a UL / SUL scenario according to an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a load balancing method according to an embodiment of the present application
  • FIG. 3a is one of schematic diagrams of a network architecture applicable to the present application provided by an embodiment of the present application;
  • 3b is a second schematic diagram of a network architecture applicable to the present application provided by an embodiment of the present application.
  • 3c is a third schematic diagram of a network architecture applicable to the present application provided by an embodiment of the present application.
  • FIG. 4 is a second schematic flowchart of a load balancing method according to an embodiment of the present application.
  • FIG. 5 is a third schematic flowchart of a load balancing method according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a load balancing device according to an embodiment of the present application.
  • FIG. 7 is a second schematic structural diagram of a load balancing device according to an embodiment of the present application.
  • FIG. 8 is a third schematic structural diagram of a load balancing device according to an embodiment of the present application.
  • FIG. 9 is a fourth schematic structural diagram of a load balancing device according to an embodiment of the present application.
  • FIG. 10 is a fifth schematic structural diagram of a load balancing device according to an embodiment of the present application.
  • load balancing The purpose of load balancing is to control unbalanced service distribution and achieve a balanced distribution of service load among different cells; maintain high wireless resource utilization and increase system capacity.
  • QoS quality of service
  • network equipment optimizes mobility parameters based on the load conditions of the current cell and neighboring cells; determines the residency distribution of terminal equipment through algorithms, delays or triggers terminal equipment switching in advance, and achieves Load balancing; considering the service capabilities of different systems; minimizing manual intervention in network management and optimization tasks.
  • the base station can detect the load of the cell and exchange load information with other base stations through the X2 interface to determine whether load transfer to adjacent cells is needed; the inter-cell modifies mobility parameters (handover parameters between cells) in a coordinated manner. Or cell reselection parameters, etc.); according to the cell switching and reselection mechanism, some terminal devices at the cell edge switch or reselect to a lightly loaded cell.
  • the load of the cell may include the following aspects:
  • Air interface load that is, the load on the interface between the network device and the terminal device, can be measured by the physical resource block (PRB) utilization and the number of terminal devices in the uplink synchronization state.
  • PRB physical resource block
  • the hardware load can be measured by the baseband board central processing unit (CPU) utilization rate and digital signal processor (digital signal processing (DSP) utilization rate).
  • CPU central processing unit
  • DSP digital signal processor
  • the CPU and DSP utilization rates can be graded, such as low load, medium load, high load, and over load. Use the level to indicate the load of the cell status.
  • Transport network layer (TNL) load The base station can evaluate the use of the width of the S1 interface, such as evaluating bandwidth utilization, determining the current load level of the transport network layer, and the load level of the transport network layer. Divided into light load, medium load, high load and overload.
  • the source cell indicates a cell that triggers load balancing and needs to transfer the load outwards, which can also be called a serving cell;
  • the target cell indicates a neighbor cell that will accept the load of the source cell;
  • the candidate neighbor cell indicates that the load cell is adjacent to the load cell.
  • the cell selection condition can be an inter-frequency or co-frequency cell of the target cell.
  • the concepts of network slicing and V2X are also introduced in the NR system. Therefore, in the handover process of the terminal device, it is also necessary to consider the selection of the target network slice in the target base station and the load of the V2X service in the target base station.
  • the embodiment of the present application provides a load balancing method for implementing fine-grained load balancing, that is, it can meet different load requirements for different services such as UL / SUL, network slicing, or V2X.
  • the load balancing method provided in the embodiments of the present application may be applied to an NR system or other communication systems in the future.
  • FIG. 2 is a schematic flowchart of a load balancing method according to an embodiment of the present application. As shown in the figure, the method may include the following steps:
  • Step 201 A first radio access network node receives a first message from a second radio access network node, and the first message includes load information of a first load type of the second radio access network node.
  • the first load type may include one or more of the following:
  • Network slice load a load situation in which a network slice or a network slice group is a unit.
  • the network slice load may include a load of a single network slice and / or a load of a network slice group.
  • the second radio access network node may determine the load information of each network slice for each network slice in the second radio access network node, and then send the load information of each network slice to the first radio access network. Incoming node.
  • the second radio access network node may determine the load information of each network slice group for each network slice group in the second radio access network node, and then send the load information of each network slice group to A first radio access network node.
  • the network slice load may further include a load of services having the same QoS requirement in each network slice (group); for example, the second radio access network node may determine each of the network slices for each network slice. Load information of all services under various QoS requirements is sent to the first radio access network node.
  • the second radio access network node may access the second radio access network.
  • the load information of the network slice in the network node that is the same as the network slice type supported by the first radio access network node is sent to the first radio access network node.
  • the second radio access network node sends the load information of the network slice load, it may send the identifier of the network slice (group) and the load information corresponding to the network to the second radio access network node.
  • V2X load The load is based on V2X service.
  • the V2X load can also include one or more of the following loads: V2X service total load, V2X service load on the air interface, V2X service load on the sidelink, Loads of services at V2X frequencies, loads of air interface services at V2X frequencies, loads of downlink services at V2X frequencies, and loads of services with the same QoS requirements in V2X.
  • the second radio access network node may determine load information of all V2X services being provided by the second radio access network node, and send the load information to the first radio access network node.
  • V2X services may occupy air interface resources (that is, the link between network equipment and terminal equipment), or resources on side links (that is, the link between terminal equipment), and the second radio access network node
  • the load of the V2X service occupying the air interface resources may be determined, and the load of the V2X service occupying the side link resources may also be determined, and sent to the first radio access network node.
  • the V2X service may use one or more frequency points, and the second radio access network node may determine, for each frequency point used by the V2X service, load information of the V2X service working at the frequency point and send it to A first radio access network node.
  • different V2X services may have different QoS requirements.
  • the second radio access network node may determine load information of V2X services with the same QoS requirement and send the load information to the second radio access network node.
  • UL / SUL load Load condition in units of UL and / or SUL.
  • the second radio access network node can perform uplink transmission with the terminal device through the UL resource and / or the SUL resource, the second radio access network node can determine the load information of the service using UL for uplink transmission and the uplink using SUL respectively.
  • the load information of the transmitted service is sent to the first radio access network node.
  • the load information of the SUL load may also include the load at each frequency point in the SUL, that is, the second radio access network node will load the frequency information.
  • the point information and the load situation at the frequency point are sent to the first radio access network node.
  • Step 202 The first radio access network node obtains the load information of the first load type.
  • the first radio access network node may perform processing according to the obtained load information of the first load type of the second radio access network node, that is, perform load balancing.
  • the load balancing method provided in the embodiment of the present application considers the respective loads of the network slice load, V2X load, and UL / SUL load, compared with the existing load balancing method, the load information considered is finer-grained load information. It can perform load balancing for the load situation of a certain network slice (group) or the load of V2X services or the load situation of UL / SUL. It can be applied to the load balancing requirements of the NR system or other systems in the future, which helps to improve Success rate of load balancing and system efficiency.
  • the load situation determined by the second radio access network node for each of the foregoing types may include measurement results of any one or more of the following measurement objects: the number of access terminal devices, hardware load (HW load), and transmission network Layer load (TNL load), reference signal received power (such as the received RSRP measurement report sent by the terminal device), radio resource status (such as physical resource block (PRB) utilization, including the total PRB of the uplink and downlink Utilization rate, guaranteed bit rate (Guaranteed Bit Rate, GBR) or non-GBR PRB utilization rate, uplink and downlink scheduling control channel element (CCE utilization rate, etc.), almost blank pointer subframe (ABS) status, available resources, channel status (such as received channel status information (CSI) information reports), available capacity / resources (composite availability, CAC).
  • PRB physical resource block
  • GBR Guarantee Bit Rate
  • CCE utilization rate uplink and downlink scheduling control channel element
  • ABS almost blank pointer subframe
  • available resources channel status (such as received channel status information (CSI) information reports), available
  • the access terminal device may refer to the number of active terminal devices, the number of idle terminal devices, or the number of deactivated terminal devices. Of course, it may also be two or three types of terminal devices in the three states described above. The total number.
  • the measurement result obtained by the second radio access network node to the first radio access network node for the one or more measurement objects may be a specific measurement value, or may be
  • the load level can also be an overload indication. Taking the load information sent by the second radio access network node to the first radio access network node including the measurement result of the PRB utilization rate as an example, if the PRB utilization rate exceeds 95%, it is overload, and 80% to 95% is high load.
  • the second radio access network node measures that the PRB utilization rate of the second radio access network node is 90%, which is a high load, but is not overloaded, then the second radio access network node may use 90% of the measured value Sending to the first radio access network node, the high load level information may also be sent to the first radio access network node, and the non-overload indication information may also be sent to the first radio access network node; if the second radio The access network node measured a PRB utilization rate of 96%.
  • the second radio access network node can send 96% of the measured value to the first radio access network node, or it can send the overloaded level information to the first radio access network.
  • the network access node may also send the overload indication information to the first radio access network node.
  • the embodiment of the present application also provides a method for determining the PRB utilization rate, that is, the PRB utilization rate can be determined according to the following formula:
  • Band represents the bandwidth occupied by all BWPs included in the access network device
  • Band (i) represents the bandwidth occupied by the i-th BWP
  • PRB (i) represents the utilization of the PRB on the i-th BWP.
  • the PRB (i ) 'S algorithm is similar to the existing PRB algorithm.
  • the second radio access network node may not send the measurement result of each measurement object to the first radio access network node, but after measuring the measurement object,
  • the measurement result of the measurement object determines whether it is overloaded and sends indication information of whether the overload is to the first radio access network node. For example, if there is an overload in the measurement results of each measurement object, it is determined that the second radio access network node is overloaded, and the indication information of the overload is sent to the first radio access network node; each measurement may also be specified If the measurement results of the objects are overloaded, the second radio access network node is considered to be overloaded, and the overload indication information is sent to the first radio access network node.
  • the second radio access network node may send the measurement results for the various measurement objects in UL and SUL to the first radio access network node; or Send overload indications for UL and SUL respectively;
  • the indication information of whether to overload is no longer necessary to indicate whether the UL and SUL are overloaded separately, that is, if the indication information indicates overload, it means that UL and SUL are overloaded.
  • the second radio access network node may also send a network slice overload indication obtained from the core network to the first radio access network node.
  • the first radio access network node may send the first information to the second radio access network node to obtain the load information of the first load type of the second radio access network node, that is, The second radio access network node responds to the first information after receiving the first information sent by the first radio access network node, and carries the load information of the first load type of the second radio access network node in The response message is sent to the first radio access network node.
  • the first information may include indication information of the first load type, that is, the load information indicating which load type of the second radio access network node the first radio access network node requests to obtain.
  • the second radio access network node sends load information of each network slice or each network slice group to the first radio access network node; If the first information includes indication information of the V2X service on the air interface and / or the V2X service on the side link, the second radio access network node loads the load information of the V2X service on the air interface and the load of the V2X service on the side link
  • the information is sent to the first radio access network node; if the first information includes the indication information of the SUL, the second radio access network node sends the load information on the SUL to the first radio access network node.
  • the first radio access network node requests to obtain each type of load information, that is, the first load type includes all the foregoing load types;
  • the default load information of the first load type may also be sent to the first radio access network node.
  • a network granularity load with a larger granularity, a V2X load, and a UL / SUL load may be set as the default first load. Types of.
  • the first information may further include a measurement object, that is, the second radio access network node measures the measurement object included in the first information for the first load type, and sends the measurement result to the first Radio access network node.
  • the indication information of the first load type included in the request is a SUL load
  • the measurement objects included in the first information include PRB utilization
  • the second radio access network node measures the PRB utilization of the SUL
  • the second The load information of the first load type sent by the radio access network node to the first radio access network node includes a measurement result of a PRB utilization rate in the SUL.
  • the first information may further instruct the second radio access network node to periodically send load information to the first radio access network node, that is, the first information may further include period information.
  • the first radio access network node may request the second radio access network node to send the load information of the first load type to the first radio access network node every 5 minutes, and the first information includes an instruction for indicating that the sending cycle is 5 minute instructions.
  • different measurement objects may have different periodic information.
  • the first information may also instruct the second radio access network node to send load information to the first radio access network node when the trigger condition is satisfied, that is, the first information may include trigger condition information.
  • the trigger condition may include that the load information of the first load type reaches a threshold, or that the load of the first load type reaches a preset load level, or that the load level of the first load type changes.
  • the trigger condition may be an event of a network slice granularity such as a change in the load level of the network slice, or a preset value for the PRB utilization of the network slice or the measurement values of other measurement objects. Threshold, etc.
  • different measurement objects may have different trigger condition information. For example, if the first load type is a network slice load, the trigger condition information for different measurement objects (such as PRB, TNL load, HW load, etc.) is different. .
  • the trigger condition may further include a difference threshold between UL and SUL, that is, the first radio access network node instructs the second radio access network node, and the measured value of the measurement object of the UL and SUL is greater than or equal to
  • a difference threshold between UL and SUL, that is, the first radio access network node instructs the second radio access network node, and the measured value of the measurement object of the UL and SUL is greater than or equal to
  • the first information may further include a cell identifier requested to be obtained, that is, the second radio access network node sends the load information of the cell corresponding to the cell identifier included in the first information to the first radio access network node.
  • the response message sent by the second radio access network node may further include measurement failure indication information
  • the measurement failure indication information may include any one or any combination of the following: The cause of the measurement failure, the measurement object of the measurement failure, and the load type of the measurement failure.
  • the first information is used to request to obtain the SUL load and the network slice load, and measure the PRB utilization rate and the transmission network layer load for each load; if the PRB utilization rate measurement of the second radio access network node is successful, the transmission network layer load is measured.
  • the response message sent by the second radio access network node to the first radio access network node may include the measurement result of the PRB utilization ratio in the SUL, the measurement result of the PRB utilization ratio in the network slice, and the transmission network layer load measurement. Failure indication information; if the second radio access network node successfully measures both the PRB utilization and transmission network layer load in the SUL, and fails to measure both the PRB utilization and transmission network layer load in the network slice, then the second The response message sent by the radio access network node to the first radio access network node may include at least information on the PRB utilization rate in the SUL, the measurement result of the transmission network layer load, and the failure of the network slice load measurement; if the second radio The access network node only measures the transmission network layer load measurement device in the network slice, and then the second radio access network node may include Measurement result of the transport network layer of the network load measuring sections failure indication information and other successful measurements.
  • the first radio access network node may send the first information to the second radio access network node, and the information contained in the first information may be as shown in Table 1.
  • the second radio access network node According to the first information, a response message is sent to the first radio access network node, and the response message includes load information of the first load type requested to be obtained by the first information, as shown in Tables 2a, 2b, and 2c.
  • the load type included in the first information may be any one or more of the foregoing load types, and the measurement object may also be any one or more of the foregoing measurement objects.
  • the application does not limit this.
  • the sending cycle can also be set for each group of load types, and can also be a unified sending cycle; the trigger condition can also be set for each load type, and the threshold can also be replaced with a change in load level, whether it is overloaded, and so on.
  • the first information may include more or less indication information than in Table 1.
  • the above table 2a exemplarily provides the load information of the network slice load sent by the second radio access network node.
  • the load information sent by the second radio access network node includes the network slice shown in the table.
  • the load information about the network slice may further include more or less load information than that in Table 2a.
  • the table may further include any one or more of a cause of the measurement failure, a measurement object of the measurement failure, and a load type of the measurement failure.
  • the above table 2b exemplarily provides the load information of UL (also non-UL, SUL, UL, and SUL) sent by the second radio access network node.
  • the second radio access network node sends the load information
  • the load information includes the number of access terminal devices in the network slice in the network slice list shown in the table, hardware load, transmission network layer load on the S1 interface, wireless resource status, CAC, ABS status, RSRP measurement report, CSI report 3. Cell reporting instructions.
  • the load information about the uplink carrier may further include more or less load information than that in Table 2b.
  • the table may further include any one or more of a cause of the measurement failure, a measurement object of the measurement failure, and a load type of the measurement failure.
  • the above table 2c exemplarily provides the load information of the V2X frequency point sent by the second radio access network node.
  • the load information sent by the second radio access network node includes the network slice shown in the table.
  • the load information about the V2X service may also include more or less load information than those in Table 2c.
  • the above table may further include any one or more of a cause of the measurement failure, a measurement object of the measurement failure, and a load type of the measurement failure.
  • the first radio access network node may not send the first information to the second radio access network node, and the second radio access network node itself decides whether to send the load information to the first radio access network node. For example, if the communication protocol stipulates that the second radio access network node sends the load information of the first load type of the second radio access network node to the first radio access network node periodically or when a trigger condition is satisfied. , Then the second radio access network node may send the load information of the first load type to the first radio access network node according to a period specified in the protocol or when a trigger condition is satisfied.
  • the first load type may be a default load type, such as a load type specified by a protocol.
  • the first load type may include all the foregoing load types, or may only include a network granularity load with a larger granularity, a V2X load, and a UL / SUL load.
  • the first radio access network node may send a request to the second radio access network node to request that the terminal device served by the first radio access network node be switched to the second radio access network node.
  • the first radio access network node determines that the load of the V2X service on the air interface is overloaded based on its own load information, and the load of the V2X service of the second radio access network node on the air interface is light, it requests that the first radio access network node The terminal device with the V2X service served by the radio access network node switches to the second radio access network node.
  • the above request may include a first load type to indicate a reason for handover, that is, the cause value of the handover may include a common load balance (a load balance that does not distinguish between load types) and / or a load of the first load type Balance, wherein the load balancing of the first load type includes any one or more of load balancing of a network slice type, load balancing of an uplink carrier type, and load balancing of a V2X type.
  • a common load balance a load balance that does not distinguish between load types
  • the load balancing of the first load type includes any one or more of load balancing of a network slice type, load balancing of an uplink carrier type, and load balancing of a V2X type.
  • the handover request sent by the first radio access network node includes V2X type load balancing cause value indication information to indicate that the handover is requested because the V2X load of the first radio access network node is overloaded; then
  • the second radio access network node can perform handover admission control based on this information.
  • the second radio access network node can infer that the terminal device requesting the handover to the second radio access network node may be based on the V2X load indication information.
  • the second radio access network node may determine whether to receive a terminal device requesting a handover according to the load of its current V2X service.
  • the above-mentioned load balancing method provided in this application may be applied to the network architecture shown in FIG. 3a, where the first radio access network node may be a first general-purpose base station (general node B, gNB in the NR system). ), The second radio access network node is a second gNB adjacent to the first gNB. Data can be transmitted between gNBs through the Xn interface, that is, the first gNB can send the first information for obtaining load information and a request for handover to the second gNB through the Xn interface, and the second gNB can send data to the first through the Xn interface. A gNB sends load information of a first load type of the second gNB.
  • the load information of the first load type sent by the second gNB may be sent through an XnAP message, such as a terminal equipment association signaling message (UE-associated) or a non-terminal equipment association signaling message (non UE-associated), Exemplarily, it can be sent through a resource status request (resource status report), a resource status response (resource status status response), a resource status failure (resource status status), or a resource status update (resource status update) message.
  • UE-associated terminal equipment association signaling message
  • non UE-associated non-terminal equipment association signaling message
  • the first radio access network node may further determine a cell switching parameter and / or a dedicated priority according to the load information of the first load type of the second radio access network node, and send it to the The terminal equipment served by the first radio access network node enables the terminal equipment to perform cell reselection according to the cell reselection parameter and / or the dedicated priority.
  • the cell reselection parameters and dedicated priorities will be described in detail in the following embodiments.
  • the gNB may include a centralized unit radio access network node (central unit, CU) and at least one distributed unit radio access network node (distributed unit, DU), CU and DU can communicate through the F1 interface, and CU and CU can communicate through the Xn interface.
  • CU central unit
  • DU distributed unit radio access network node
  • a possible implementation manner is to set functions above the packet data convergence protocol (PDCP) layer in the CU, such as PDCP, radio resource control (RRC), and service data adaptation protocol layer (service data (adaptation protocol, SDAP), etc., set the functions below the PDCP layer in the DU, such as radio link layer control protocol (radio link control, RLC), media access control layer (media access control, MAC), and physical layer (physical layer) , PHY) and so on.
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • RLC radio link layer control protocol
  • media access control layer media access control
  • PHY physical layer
  • the first radio access network node may be a first CU in a gNB
  • the second radio access network node may be a second CU in a neighboring gNB.
  • the interaction process between the first CU and the second CU is similar to the foregoing embodiment, and the load information of the first load type sent by the second CU may be the load information of the second CU, or the Load information of the second CU and one or more DUs managed by the second CU.
  • the second CU determines that the neighboring cell 1 is a cell under the DU3 managed by the second CU, and the second CU obtains the PRB utilization rate of the cell 1 from the DU3. And send it to the first CU; optionally, the first CU may send the obtained PRB utilization rate of the neighboring cell 1 to one or more DUs managed by the first CU; optionally, the second CU obtains
  • the process of the PRB utilization rate of cell 1 can also send the load information of the cell under DU3 to the second CU before the second CU receives the request from the first CU, such as DU3 periodically or when the trigger condition is met. .
  • the first CU requests to obtain the PRB utilization rate of the V2X service of the second CU, and the second CU obtains the PRB utilization rate of the V2X service in each DU managed by the second CU in advance. Then, the second CU according to the second The PRB utilization rate of the V2X service of each DU managed by the CU determines the PRB utilization rate of the V2X service of the second CU and sends it to the first CU.
  • the first radio access network node is a gNB and the second radio access network node is a CU of an adjacent gNB
  • the interaction process of the load information of the first load type between the two radio access network nodes is similar to the above, here No longer.
  • the above method can also be applied between a CU and a DU in a gNB, that is, the first radio access network node is a CU, the second radio access network node is a DU, or the first radio access network node is The DU and the second radio access network node are CUs.
  • CU1 may send first information to DU1, requesting that DU1 periodically report the first Load information of a load type or report load information of a first load type when a trigger condition is satisfied.
  • DU1 can also actively report or update the load information of the first load type to CU1.
  • DU1 can autonomously determine the period or trigger condition to decide whether to report and how to report.
  • the first information may include indication information of a first load type, a sending period, or a triggering condition, and the like, which is similar to the foregoing embodiment and will not be described again.
  • DU1 sends the load information of the first load type of DU1 to CU1 according to the first information.
  • DU1 may also send load information to CU1 according to a predetermined period of time or send the load information to CU1 when a trigger condition is met.
  • DU1 may send the load information of the first load type to CU1 through an F1AP message, such as a UE-associated signaling message or a UE-associated non-UE signaling message.
  • F1AP message such as a UE-associated signaling message or a UE-associated non-UE signaling message.
  • You can also define a new F1 interface message to send the above load information.
  • CU1 After receiving the load information about the first load type sent by DU1, CU1 can perform load balancing according to the load information of DU1. For example, if CU1 determines that the UL and SUL of DU1 are overloaded based on the UL / SUL load information sent by DU1, or receives the UL / SUL overload indication information sent by DU1, the terminal device in DU1 can be switched to another DU managed by CU1 in. If the other DUs managed by CU1 are also heavily loaded and are not suitable for receiving switching terminal equipment, and the UL / SUL load in the DUs managed by CU2 is light, CU1 can send a switching request to CU2 requesting that the terminals in DU1 be switched to CU2.
  • CU1 may also determine the switching strategy of CU1 according to the load information of the DUs it manages. For example, if CU1 determines that the current CU1 load is heavy according to the load information sent by DU1, DU2 ..., if at this time a switch request from CU2 is received, requesting that the terminal device in CU2 be switched to CU1, CU1 can refuse to accept CU2 Terminal equipment.
  • the first load type is similar to the first load type of the foregoing interaction between the base station and the base station, and may include one or more of the following: the load of the network slice, the load of the network slice group, and services with the same QoS requirements in a single network slice Load of V2X service, load of V2X service on air interface, load of V2X service on side link, load of service at V2X frequency, load of air interface at V2X frequency, load at V2X service The load of side link services, the load of services with the same QoS requirements in V2X, and the load of UL and / or SUL. If the CU (or DU) also sends the first information, the first information may include indication information of one or more of the foregoing load types, that is, indication information
  • the load information sent by the DU is a measurement result of a measurement object that can be measured by the DU.
  • the measurement object that can be measured by the DU may include one of the following or Various: radio resource status, ABS status, channel status, CAC.
  • the load information sent by the CU is a measurement result of a measurement object that the CU can measure.
  • the measurement object that the CU can measure may include one of the following or Multiple: hardware load, transmission network layer load, reference signal received power (for example, the CU can send the received RSRP measurement report to the DU).
  • the CU can also change the frequency supported by the V2X service.
  • the point information and / or QoS information is sent to the DU.
  • the load information of the first load type sent between the CU and the DU can be sent through an F1AP message, such as a UE-associated message or a non-UE-associated message, which is exemplary. , For example, by sending a resource / status request / response / failure / update message.
  • F1AP message such as a UE-associated message or a non-UE-associated message
  • the CU After the CU obtains the load information of each cell under the DU, it can determine the cell reselection parameters and / or dedicated priorities based on the load information and send them to the DU; the DU can broadcast the cell reselection parameters and / or dedicated priorities To the terminal device, so that the terminal device performs cell reselection according to the cell reselection parameter and / or the dedicated priority.
  • the cell reselection parameters and dedicated priorities will be described in detail in the following embodiments.
  • the DU may include a relay device, that is, the foregoing method may be applied to a multi-hop relay scenario, or a scenario in which a DU and a terminal device transmit through the relay device.
  • the foregoing CU and DU may also be CU and DU in the CU-DU separation architecture of LTE.
  • the above load balancing method can also be applied to a distributed base station as shown in FIG. 3c, where the CU is further divided into a control plane centralized unit wireless access network node (CU-CP) and a user plane centralized unit wireless access.
  • Network access node (CU-UP) CU-CP and CU-UP can communicate through E1 interface
  • CU-CP and DU can communicate through user plane F1-C interface
  • CU-UP and DU Can communicate through the user plane F1-U interface
  • CU-CP and CU-CP can communicate through the Xn interface.
  • the CU-CP may include a PDCP layer and an RRC layer
  • the CU-UP includes a PDCP layer and a service data adaptation protocol (SDAP) layer.
  • SDAP service data adaptation protocol
  • the SDAP layer may responsible for QoS-related access, including routing of QoS flows to the DRB, identification (ID) confirmation of uplink and downlink QoS flows, and so on.
  • the first radio access network node may be a first CU-CP in a gNB
  • the second radio access network node may be a second CU-CP in a neighboring gNB.
  • the interaction process between the first CU-CP and the second CU-CP is similar to the interaction process between the base station and the base station, and the interaction process between the CU and the CU, and is not repeated here.
  • the auxiliary type of load information sent by the second CU-CP may be the load information of the second CU-CP, or the load information of the CU-CP, or at least one CU-UP managed by the CU-CP. Load information and load information of at least one DU managed by the CU-CP.
  • the first radio access network node may also be a gNB
  • the second radio access network node may be a CU-CP of an adjacent gNB
  • the first load type of load information interaction between the two radio access network nodes The process is similar to the above, and is not repeated here.
  • the above method can also be applied between a CU-CP and a CU-UP managed by the CU-CP, that is, the first radio access network node is a CU-CP and the second radio access network node is a CU-UP.
  • the first radio access network node is a CU-UP and the second radio access network node is a CU-CP.
  • CU-CP1 may send the first information to CU-UP1.
  • Request CU-UP1 to report the load information of the first load type periodically or report the load information of the first load type when the trigger condition is met.
  • CU-UP1 can also actively report or update the first load type to CU-CP1.
  • CU-UP1 can independently determine the period and trigger conditions to determine whether to report and how to report.
  • the first information may include indication information of the first load type, a transmission period, or a trigger condition (the first load type, the transmission period, and a trigger condition are similar to the foregoing embodiments, and are not described herein again).
  • CU-UP1 A message and sends the load information of the first load type of CU-UP1 to CU-CP1.
  • the CU-UP1 may also send load information to the CU-CP1 according to a protocol, or send the load information to the CU-CP1 when a trigger condition is met.
  • the CU-UP1 may send the load information of the first load type to the CU-CP1 through the E1AP message.
  • a new E1 interface message may also be defined to send the load information.
  • CU-CP1 After receiving the load information about the first load type sent by CU-UP1, CU-CP1 can perform load balancing according to the load information of CU-UP1. For example, if CU-CP1 determines that the load of the V2X service of CU-UP1 on the air interface is overloaded based on the load information of the V2X service on the air interface sent by DU1, or receives the overload indication information of the V2X service on the air interface sent by CU-UP1, The terminal equipment served by CU-UP1 is switched to other CU-UP1 managed by CU-CP1.
  • CU-CP1 can forward CP2 sends a handover request, requesting that the terminal in CU-UP1 be handed over to CU-CP2.
  • CU-CP1 can also determine the switching strategy of CU-CP1 according to the load information of CU-UP1 it manages. For example, if CU1 determines that the current load of CU-CP1 is heavy according to the load information sent by CU-UP1, CU-UP1 ..., if it receives a switch request from CU-CP2 at this time, it requests that the terminal device in CU-CP2 be switched In CU-CP1, CU-CP1 can refuse to accept the terminal device in CU-CP2.
  • the load type of the load information exchanged between the first radio access network node and the second radio access network node, and the load information exchanged with the base station There is no difference in the type of load, which can include one or more of the following: the load of a network slice, the load of a network slice group, the load of a service with the same QoS requirements in a single network slice, the load of a V2X service, the load of a V2X service on an air interface, V2X The load of the traffic on the side link, the load of the same frequency point in the V2X service, the load of the service with the same QoS requirement in V2X, and the load of UL and / or SUL.
  • the load information of the first load type sent by the CU-UP may include a hardware load of the first load type and / or The first load type is the transport network layer load.
  • the load information of the first load type sent by the CU-CP may include one or more of the following: the first load Type of hardware load, transmission network layer load of the first load type, and reference signal reception power of the first load type (for example, the CU-CP may send the received RSRP measurement report to the CU-UP).
  • the embodiment of the present application further provides a load balancing method for implementing fine-grained load balancing, that is, it can satisfy different load requirements for different services such as UL / SUL, network slicing, or V2X.
  • the load balancing method provided in the embodiments of the present application may be applied to an NR system or other communication systems in the future.
  • FIG. 4 is a schematic flowchart of a load balancing method according to an embodiment of the present application. As shown in the figure, the method may include the following steps:
  • Step 401 The first radio access network node sends a second message to the second radio access network node, where the second message is used to request the second radio access network node to modify the second radio access network node's first message.
  • Mobility parameters for a load type may include the following one or more: a load of a network slice, a load of a network slice group, a load of a service having the same QoS requirement in a single network slice, a load of a V2X service, a V2X The load of the air interface service, the load of the V2X service on the side link, the load of each frequency point in the V2X service, the load of the air interface service at each frequency point of V2X, the load of the side link service at each frequency point of V2X, V2X Loads of services with the same QoS requirements, loads of UL and / or SUL.
  • the base station (cell) can send the mobility parameter information to the terminal equipment served by the base station (cell).
  • the terminal equipment determines whether to perform cell handover or cell reselection according to the mobility parameter.
  • the second message sent by the first radio access network node to the second radio access network node may include switching trigger change information of the first load type of the second radio access network node.
  • the second message includes the cell identifier of the first radio access network node, the cell identifier of the second radio access network node, the mobility parameter information of the first radio access network node, and the second radio access Any one or more of the mobility parameter information proposed to be modified by the network node, where the mobility parameter of the first radio access network node is the mobility parameter of the first load type currently configured by the first radio access network node
  • the mobility parameter proposed to be modified by the second radio access network node is a mobility parameter of the first load type recommended to be modified by the second radio access network node, and the mobility parameter of the first radio access network node and the second radio access network are modified.
  • the mobility parameters proposed to be modified by the network node include handover trigger change information (for example, handover trigger change), such as the handover trigger change value compared with the current value, that is, the handover trigger change value is the first load type granularity of the handoff trigger change. value.
  • handover trigger change information for example, handover trigger change
  • the mobility parameter that is requested to be modified may be a cell-specific offset (or cell offset, CIO) of a measurement event (such as A3 or A5); for SUL
  • the mobility parameter requested to be modified may be the CIO of a certain measurement event (for example, A3).
  • other parameters may also be requested to be modified, which is not limited in this application.
  • the said message may also include a cause value, which indicates the reason that triggers the modification of the mobility parameter, such as the cause of the dual link operation and the handover operation.
  • the second radio access network node determines that the modification is needed based on the cause value. What kind of mobility parameter.
  • the message may request the second radio access network node to modify the mobility parameter of the first load type, that is, the modified mobility of the second radio access network node expected by the first radio access network node. parameter. If the load of the first radio access network node is heavy, in order to effectively prevent the terminal equipment of the second radio access network node from switching to the first radio access network node, the first radio access network node may The modified mobility parameter of the radio access network node is sent to the second radio access network node.
  • the above mobility parameter information is mobility parameter information of the first load type granularity, for example, there are different mobility parameter information for network slices (groups), SUL / UL, and V2X.
  • the message may further include public mobility parameter information, that is, the public mobility parameters of the first radio access network node and / or the public mobility parameters suggested to be modified by the second radio access network node.
  • the common mobility parameter represents a mobility parameter that does not distinguish between load types.
  • the second message may reuse a mobility parameter change request (mobility change request) message in LTE, or may also use a Xn AP message in NR, or a newly defined Xn AP message, which is not limited in the present invention.
  • the second message may also have another name, which is not limited in the present invention.
  • Step 402 The first radio access network node receives a response from the second radio access network node.
  • the second radio access network node may modify the mobility parameter of the requested first load type according to the message requesting to modify the mobility parameter received from the first radio access network node, and send the first radio access network node to the first radio access network node.
  • a response is returned, and the modified mobility parameter is sent to the terminal device of the second radio access network node to increase the difficulty of the terminal device of the second radio access network node to switch to the first radio access network node.
  • the first load type may include the following one or more: a load of a network slice, a load of a network slice group, a load of a service having the same QoS requirement in a single network slice, a load of a V2X service, a V2X
  • the returned response message is to The first radio access network node, optionally, the response message includes indication information of a first load type, and the indication information of the first load type is used to indicate a mobility parameter of the first load type that is successfully modified.
  • the mobile modification failure message includes indication information of a first load type, and the indication information of the first load type is used to indicate mobility parameters of the first load type that failed to be modified; optionally, the second radio access network node
  • the modifiable range of the mobility parameter may also be carried in the failure message and sent to the first radio access network node, so that the first radio access network node resends a message requesting modification of the mobility parameter according to the modifiable range, Or give up modifying the mobility parameter of the second radio access network node; for example, the second radio access network node carries the modifiable range of the mobility parameter of the first load type that failed to be modified, and sends it in the above-mentioned failure message.
  • the modifiable range of the mobility parameter may be a handover trigger change lower limit (handover trigger change) e lowerer limit).
  • the second radio access network node may only indicate that the first radio access network node has failed to modify the mobility parameter information, which is similar to the foregoing; it may also indicate separately Modify the mobility parameters that failed and modify the mobility parameters that were successful.
  • the failure message may further include a modifiable range of a common mobility parameter.
  • the above mobility parameter modification range is the modification range of the mobility parameter of the first load type granularity, for example, there are different mobility parameter modification ranges for network slice, SUL / UL, and V2X.
  • the second radio access network node may carry the indication information of the parameter that fails to be modified and send it to the first radio access network node in the response; optionally, it may also send the modifiable range of the mobility parameter that fails to be modified to the first radio access network A node, so that the first radio access network node resends a message requesting to modify a mobility parameter according to the modifiable range, or abandons modifying this part of the parameter.
  • the response message may reuse a mobility change acknowledgement (mobility change acknowledgement) or a mobility change failure (mobility change failure) message in LTE, or use an existing Xn AP message of NR, or use a newly defined Xn AP message.
  • the invention is not limited herein.
  • the response message may also be other names, which is not limited in the present invention.
  • the foregoing first load type may include one or more of the following: a load of a network slice, a load of a network slice group, a load of a service having a same QoS requirement in a single network slice, a total load of a V2X service, and a V2X service
  • the load on the air interface, the load on the side link of the V2X service, the load on each frequency point of the V2X, the load on the air interface at each frequency point of the V2X, the load on the side link service at each frequency point of the V2X service, and the same in V2X QoS requires the load of the service, the load of the UL and / or the SUL.
  • the first radio access network node sends a message to the second radio access network node requesting to modify a mobility parameter of a network slice (group) load of the second radio access network node, and the message may include the first radio access network.
  • Mobility parameter information of the network slice (group) of the access node, the mobility parameter information of the network slice (group) that the second radio access network node proposes to modify, and the public mobility parameter information of the first radio access network node One or more of the public mobility parameter information proposed to be modified by the second radio access network node, where the mobility parameter information of the network slice (group) and / or the cell format of the public mobility parameter information is as follows: Tables 3a and 3b show.
  • the second radio access network node After receiving the above message, the second radio access network node returns a mobility modification response message to the first radio access network node if it is successfully modified; otherwise, if the modification fails, it returns a mobility parameter modification failure.
  • the mobility modification failure message includes the mobility parameter modification range of the network slice (group) and / or the public mobility parameter modification range, as shown in Tables 4a and 4b.
  • the first radio access network node sends a message requesting to modify the mobility parameter of the network slice (group) load of the second radio access network node to the second radio access network node, and the message includes the first radio access network.
  • the mobility parameter delta information of the network slice (group) of the access node, and the second radio access network node proposes to modify the mobility parameter delta information of the network slice (group).
  • the first radio access node Common mobility parameter delta information of the access node, common mobility parameter delta information suggested by the second radio access network node to be modified, and common mobility of the first radio access network node Parameter information, one or more of public mobility parameter information proposed to be modified by the second radio access network node, wherein the mobility parameter delta information of the network slice (group) and / or the public mobility Parameter information is shown in Table 5a.
  • the second radio access network node After receiving the above message, the second radio access network node returns a mobility modification response message to the first radio access network node if it is successfully modified; otherwise, if the modification fails, it returns a mobility parameter modification failure.
  • the mobility modification failure message includes the mobility parameter modification range of the network slice (group) and / or the public mobility parameter modification range, as shown in Table 5b.
  • the cause value of the second message sent by the first radio access network node to the second radio access network node may be the cause value related to the load balancing of the network slice load, such as Enhanced Mobile Broadband Band (eMBB), Ultra Reliable Low Latency Communication (URLLC), Internet of Things (IoT), etc.
  • eMBB Enhanced Mobile Broadband Band
  • URLLC Ultra Reliable Low Latency Communication
  • IoT Internet of Things
  • the first radio access network node sends a message requesting modification of the SUL mobility parameter of the second radio access network node to the second radio access network node, and the message may include the information of the first radio access network node.
  • Mobility parameter information of the uplink carrier, the mobility parameter information of the uplink carrier proposed to be modified by the second radio access network node, the public mobility parameter information of the first radio access network node, and the second radio access network node proposal One or more of the modified common mobility parameter information, wherein the cell format of the uplink carrier is shown in Table 6a.
  • the second radio access network node After receiving the above message, the second radio access network node returns a mobility modification response message to the first radio access network node if it is successfully modified; otherwise, if the modification fails, it returns a mobility parameter modification failure.
  • the mobility modification failure message includes SUL / NUL (normal UL) mobility parameter modification ranges, as shown in Table 6b.
  • the cause value of the second message sent by the first radio access network node to the second radio access network node may be a cause value related to UL / SUL granularity load balancing.
  • Modification of UL / SUL mobility parameters may also include common mobility parameter modification information and incremental variable mobility modification information, which is similar to the information of the network slice (group), and is not repeated here.
  • the first radio access network node sends a message to the second radio access network node requesting to modify the mobility parameters of the V2X service (group) and the V2X service frequency point (group) load.
  • the message may include the first wireless access network.
  • Mobility parameter information of the V2X service (group) of the access node, the mobility parameter information of the V2X (group) proposed by the second radio access network node, and the public mobility parameter information of the first radio access network node One or more of the public mobility parameter information suggested to be modified by the second radio access network node, where the cell format of V2X is shown in Table 7a.
  • Handover Trigger Change List > Handover TriggerChange > V2X frequency Frequency of V2X service
  • the second radio access network node After receiving the above message, the second radio access network node returns a mobility modification response message to the first radio access network node if it is successfully modified; otherwise, if the modification fails, it returns a mobility parameter modification failure.
  • the mobility modification failure message includes the mobility parameter modification range of the V2X service (group) and / or V2X service frequency (group), as shown in Table 3b.
  • V2X frequency in Table 7a and Table 7b can also be replaced with a V2X service or V2X Qos, that is, a load indicating that the V2X service has the same QoS requirement.
  • the cause value of the second message sent by the first radio access network node to the second radio access network node may be a cause value related to V2X frequency point or V2X service or V2X Qos granular load balancing.
  • the modification of the mobility parameters of the V2X service load may also include public mobility parameter modification information and incremental variable mobility modification information, which is similar to the network slice (group) granularity and will not be described again here.
  • the first radio access network node sends a message requesting to modify the mobility parameter of the UE capability load to the second radio access network node, and the message may include the mobility parameter of the UE capability load of the first radio access network node.
  • Information, the mobility parameter information of the UE capability load proposed by the second radio access network node to be modified, the public mobility parameter information of the first radio access network node, and the public mobility proposed by the second radio access network node to be modified One or more of the parameter information, wherein the cell format of the UE capability load is shown in Table 8a.
  • the second radio access network node After receiving the above message, the second radio access network node returns a mobility modification response message to the first radio access network node if it is successfully modified; otherwise, if the modification fails, it returns a mobility parameter modification failure.
  • the mobility modification failure message includes the mobility parameter modification range of the UE capability load, as shown in Table 8b.
  • the cause value of the mobility modification message sent by the first radio access network node to the second radio access network node may be a cause value related to the load balancing of the UE capability load, such as which UE capability can be supported.
  • This type of business is not limited in this application.
  • the mobility parameter modification for the UE capability load may also include public mobility parameter modification information and incremental variable mobility modification information, which is similar to the network slice (group) granularity and will not be described again here.
  • the first radio access network node may be a source base station, and the second radio access network node may be a target base station.
  • the source base station and the target base station may also be applicable in a multi-link data transmission scenario.
  • the source base station can serve as the primary base station, and the target base station can serve as the secondary base station.
  • the first radio access network node may also be a CU, and the second radio access network node may be an adjacent CU; or the first radio access network node may be a CU-CP, and the second radio access network node may be Adjacent CU-UP.
  • the embodiment of the present application further provides a load balancing method for implementing fine-grained load balancing, that is, it can satisfy different load requirements for different services such as UL / SUL, network slicing, or V2X.
  • the load balancing method provided in the embodiments of the present application may be applied to an NR system or other communication systems in the future.
  • FIG. 5 is a schematic flowchart of a load balancing method according to an embodiment of the present application. As shown in the figure, the method may include the following steps:
  • Step 501 The first radio access network node sends a load balancing parameter of a first load type to a terminal device.
  • the first load type may include the following one or more: a load of a network slice, a load of a network slice group, a load of a service having the same QoS requirement in a single network slice, a load of a V2X service, a V2X
  • the load balancing parameters of the first load type may include cell reselection parameters and / or dedicated priorities. That is, the cell reselection parameter includes a network slice (group) type cell reselection parameter, a UL / SUL type cell reselection parameter, and / or a V2X type cell reselection parameter; the dedicated priority includes a network slice (group) type. Private priority, UL / SUL type private priority, and / or V2X type private priority.
  • the cell reselection parameter may include a specific cell-oriented parameter (for example, an offset value Qoffset of a target cell in the R criterion), that is, the first radio access network node modifies the Qoffset for the specific cell.
  • the Qoffset may be network slice (group) granularity, that is, different network slices (groups) in the specific cell may have different Qoffsets.
  • the first radio access network node may slice the network slice.
  • Qoffset is sent to the terminal device.
  • the Qoffset may also be UL / SUL granularity, that is, the SUL and UL in the specific cell may have different Qoffsets.
  • the Qoffset may also have a granularity of frequency points of the V2X service, that is, different frequency points under the V2X service in the specific cell may have different Qoffsets.
  • the terminal device sorts the candidate reselection cell to select the optimal cell according to the cell reselection parameter. For example, the terminal device selects the network slice of the appropriate cell according to the cell reselection parameter of the network slice (group) granularity. (Group) for data transmission, or the terminal device selects the appropriate cell's uplink carrier for data transmission based on the cell reselection parameters of the uplink carrier granularity, or the terminal device selects the appropriate cell's V2X for the cell reselection parameters of the V2X frequency granularity Frequency for data transmission.
  • group granularity
  • the first radio access network node may send network slice information and / or V2X frequency point information supported by the first radio access network node to the terminal device.
  • the first radio access network node determines Qoffset1 of the network slice 1 of the neighboring cell 1, Qoffset2 of the network slice 2, Qoffset3 of the network slice 3 ..., the first radio access network node Determine Qoffset1 'of network slice 1 of neighboring cell 2, Qoffset2' of network slice 2 and Qoffset3 'of network slice 3 ... the first radio access network node sends the identity of the cell (such as PCI, CGI, etc.), network slice Identification (such as S-NSSAI) and the corresponding Qoffset to the terminal device, the terminal device selects an appropriate cell and the network slice in the cell for data transmission according to the received Qoffset of multiple neighboring cells.
  • the identity of the cell such as PCI, CGI, etc.
  • network slice Identification such as S-NSSAI
  • the dedicated priority is the priority of different network slices (groups), and the terminal device can select an appropriate network slice (group) according to the priorities of different network slices (groups). Carry out business transmission.
  • the dedicated priority may be the priority of different frequency points in the V2X service, and the terminal device may select an appropriate frequency point for transmission of the V2X service according to the priority of different V2X frequency points.
  • the dedicated priority may be the priority of UL and SUL. The terminal device selects an appropriate UL or SUL for uplink data transmission according to the priorities of UL and SUL.
  • the first radio access network node determines the priority of each network slice according to the load of the network slices supported in each cell.
  • the first radio access network node may The identification of each network slice (for example, single network slice selection load information (S-NSSAI), and the priority of the network slice to the terminal device.
  • S-NSSAI single network slice selection load information
  • the first radio access network node may first perform measurement of terminal device load information in an idle state and / or a deactivated state in the cell of the first radio access network node.
  • the load information may be measured by counting the number of idle terminal devices and / or deactivated terminal devices under the first load type, thereby determining the load balancing parameters of the first load type.
  • the first radio access network node may further obtain load information of a first load type of a radio access network node such as a neighboring base station, a CU, or a CU-CP.
  • the process of obtaining load information is similar to the previous embodiment, and is not repeated here.
  • the first radio access network node determines load balancing parameters of the first load type of the first radio access network node according to the obtained load information of the other load types of the other radio access network nodes.
  • the first radio access network node may send the load balancing parameter of the first load type to the terminal device through a broadcast message, or may also send it through other newly defined messages, which is not limited in the present invention.
  • Step 502 The terminal device performs cell reselection according to the load balancing parameters.
  • the load considered Information is load information with finer granularity. It can load balance the load of a network slice (group) or the load of V2X services or the load of UL / SUL. It can be applied to NR systems or other future systems. The load balancing requirements help to improve the success rate of load balancing and system efficiency.
  • a first radio access network node may obtain load information of a first load type of a second radio access network node; and then the first radio access network node may modify the first radio access network node according to the load information of the second radio access network node.
  • Load balancing parameters cell reselection parameters and / or dedicated priorities
  • the terminal device in the idle state and the deactivated state of the first radio access network node performs cell rebalancing according to the modified load balancing parameters selected.
  • the first radio access network node may obtain load information of a first load type of the second radio access network node; and then the first radio access network node may modify the first radio access network node according to the load information of the second radio access network node.
  • a load balancing parameter cell reselection parameter and / or dedicated priority
  • the first radio access network node may also request to modify the mobility parameters of the second radio access network node to reduce the number of terminal devices switching from the second radio access network node to the first radio access network node.
  • the order in which the first radio access network node modifies its own load balancing parameters and requests to modify the mobility parameters of the second radio access network node may be interchanged.
  • a first radio access network node may obtain load information of a first load type of a second radio access network node; then, the first may request to modify a mobility parameter of the second radio access network node to reduce The second radio access network node switches to a terminal device of the first radio access network node.
  • a first radio access network node receives a request sent by a second radio access network node to modify a mobility parameter of a first load type of the first radio access network node, and the first radio access network node according to The request modifies the load balancing parameters of the first load type of the first radio access network node to reduce the idle state and the deactivated state of the first radio access network node to the second radio access network node.
  • the embodiment of the present application further provides a load balancing device, which is used to implement the function of the first radio access network node in the foregoing method embodiment.
  • the apparatus may include a transceiver unit 610 and a processing unit 620.
  • the transceiver unit is configured to receive a first message from a second radio access network node, where the first message includes load information of a first load type of the second radio network node, and the first load
  • the types include any one or more of the following: network slice load, V2X load of the car connected to everything, and supplementary uplink SUL load;
  • a processing unit configured to obtain load information of the first load type.
  • the transceiver unit is further configured to: send the first information to the second radio access network node, and the first information is used to acquire the second radio access network node. Load information for the first load type.
  • the first information further includes a sending period of the load information of the first load type; or the first information further includes sending of the load information of the first load type. Trigger conditions.
  • the load information of the network slice load includes: an identifier of a single network slice and a load condition of the single network slice, and / or, an identifier of a network slice group and an identifier of the network slice group.
  • the load information of the V2X load includes V2X frequency information
  • the load information of the V2X load further includes any one or more of the following: V2X corresponding to the V2X frequency information is on an air interface Load conditions of the V2X service corresponding to the frequency information of the V2X on the side link, load conditions of services with the same quality of service QoS in the V2X; and / or, the supplementary uplink SUL load information Including: the frequency of the supplementary uplink and the load of the supplementary uplink.
  • the load condition includes measurement results of any one or more of the following measurement objects: the number of access terminal devices, hardware load, transmission load, reference signal received power measurement report, wireless Resource status, ABS status information, available resources, channel status information report, and access cell control information.
  • the measurement result includes a measurement value and / or overload indication information.
  • the transceiver unit is further configured to send a request to the second radio access network node, where the request is used to request a terminal device that serves the first radio access network node.
  • the request includes indication information of the first load type, and the indication information of the first load type is used to indicate a reason for the handover.
  • the device is a centralized unit CU and the second radio access network node is a distributed unit DU; or the device is a DU and the second radio access network node For CU.
  • the CU has any one or more of the following protocol layer functions: a packet data convergence protocol, a radio resource control, and a service data adaptation protocol;
  • the DU has any one or more of the following protocol layer functions: a wireless link Layer control protocol, media access control layer, physical layer; the CU and DU belong to the same wireless base station.
  • the load information of the first load type of the DU includes one or more of the following: the radio resource status of the first load type, the almost blank pointer ABS status of the first load type, and the first The channel status information report of the load type, and the cell access control information of the first load type; or the load information of the first load type of the CU includes one or more of the following: a hardware load of the first load type, a first Load type transmission load, reference signal received power measurement report of the first load type.
  • the first radio access network node is a control plane centralized unit radio access network node CU-CP
  • the second radio access network node is a user plane centralized unit radio access network.
  • Node CU-UP; or the first radio access network node is a user plane centralized unit radio access network node CU-UP
  • the second radio access network node is a control plane centralized unit radio access network node CU -CP; the CU-CP and CU-UP belong to the same wireless base station.
  • the load information of the first load type of the CU-UP includes a hardware load of the first load type and / or a transmission load of the first load type; or, the CU -The load information of the first load type of the CP includes one or more of the following: a hardware load of the first load type, a transmission load of the first load type, and a reference signal received power measurement of the first load type report.
  • the embodiment of the present application further provides a load balancing device for implementing the function of the second radio access network node in the foregoing method embodiment.
  • the device may include a transceiver unit 710 And processing unit 720.
  • the transceiver unit 710 is configured to send a first message to a first radio access network node under the control of the processing unit 720.
  • the first message includes load information of a first load type, and the first load Types include one or more of the following: network slicing load, car connected V2X load, and supplemental uplink SUL load.
  • the transceiver unit is further configured to: receive first information from the first radio access network node, and the first information is used to obtain the second radio access network node's Load information for the first load type.
  • the first information further includes a sending period of the load information of the first load type; or the first information further includes sending of the load information of the first load type. Trigger conditions.
  • the load information of the network slice load includes an identifier of a single network slice and a load condition of the single network slice, and / or a description of a network slice group and a load condition of the network slice group. ;
  • the load information of the V2X load includes V2X frequency information, and the load information of the V2X load further includes any one or more of the following: a load of the V2X on the air interface corresponding to the V2X frequency information Situation, load situation of a V2X service corresponding to the V2X frequency information on a side link, load situation of a service with the same quality of service QoS in V2X; and / or, the supplementary uplink SUL load information includes: The frequency of the supplemental uplink and the load of the supplemental uplink.
  • the load condition includes measurement results of any one or more of the following measurement objects: the number of access terminal devices, hardware load, transmission load, reference signal received power measurement report, and wireless resources. Status, ABS status information, available resources, channel status information report, access cell control information.
  • the measurement result includes a measurement value and / or overload indication information.
  • the transceiver unit is further configured to receive a request from the first radio access network node, where the request is used to request a terminal device serviced by the first radio access network node to be switched To the second radio access network node, the request includes indication information of the first load type, and the indication information of the first load type is used to indicate a reason for the handover.
  • the first radio access network node is a centralized unit CU, and the second radio access network node is a distributed unit DU; or the first radio access network node Is DU, and the second radio access network node is C.
  • the CU has one or more of the following protocol layers: a packet data convergence protocol, a radio resource control, and a service data adaptation protocol;
  • the DU has one or more of the following protocol layers: a radio link layer control protocol, and media access Control layer and physical layer; the CU and the DU belong to the same wireless base station.
  • the load information of the first load type of the DU includes one or more of the following: the radio resource status of the first load type, the almost blank pointer ABS status of the first load type, and the first The channel status information report of the load type, and the cell access control information of the first load type; or the load information of the first load type of the CU includes one or more of the following: a hardware load of the first load type, a first Load type transmission load, reference signal received power measurement report of the first load type.
  • the first radio access network node is a control plane centralized unit radio access network node CU-CP
  • the second radio access network node is a user plane centralized unit radio access network.
  • Node CU-UP; or the first radio access network node is a user plane centralized unit radio access network node CU-UP
  • the second radio access network node is a control plane centralized unit radio access network node CU -CP; the CU-CP and the CU-UP belong to the same wireless base station.
  • the load information of the first load type of the CU-UP includes a hardware load of the first load type and / or a transmission load of the first load type; or, the CU -The load information of the first load type of the CP includes one or more of the following: a hardware load of the first load type, a transmission load of the first load type, and a reference signal received power measurement of the first load type report.
  • An embodiment of the present application further provides a communication system, which may include the load balancing device shown in FIG. 6 and the load balancing device shown in FIG. 7.
  • an embodiment of the present application further provides a load balancing device, which is used to implement the function of the first radio access network node in the foregoing method embodiment.
  • the apparatus may include a transceiver unit 810 and a processing unit 820.
  • the transceiver unit is configured to receive a second message sent by the first radio access network node, and the second message includes: used to request the second radio access network node to modify the second radio access network Mobility parameter of a first load type of a node, the first load type includes any one or more of the following: a network slice load, a car-connected V2X load, and a supplemental uplink SUL load.
  • a processing unit configured to modify a mobility parameter of the second radio access network node according to the second message.
  • the transceiver unit is further configured to send a response to the first radio access network node.
  • the mobility parameter information includes handover trigger change information.
  • the message includes: mobility parameter information of a first load type requesting the second radio access network node to modify.
  • the response includes indication information used to indicate that the second radio access network node successfully modifies a mobility parameter; or the response includes the second radio access network Mobility parameter modification range of the first load type of the node.
  • the network slice load includes a load of a single network slice and / or a load of a network slice group; and / or, the V2X load includes one or more of the following: V2X services on an air interface Load, the load of the V2X service on the side link, the load of each frequency in the V2X service, the load of the air interface service at each frequency point of V2X, the load of the side link service at each frequency point of V2X, and the same quality of service in QoS Business load.
  • the embodiment of the present application further provides a load balancing device for implementing the function of the first radio access network node in the foregoing method embodiment, and the device may be the first wireless access in the foregoing method embodiment.
  • the network node may also be a chip provided in the first radio access network node.
  • the device When the device is a first radio access network node, as shown in FIG. 9, the device may include a processor 910, a memory 920, and a communication interface 930. Optionally, the device may further include a bus 940.
  • the processor 910 may be configured to execute an instruction in the memory 920, and implement the function of the first radio access network node in the foregoing method embodiment through the communication interface 930.
  • the processor 910 may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the solution of the present application.
  • the communication bus 940 may include a path for transmitting information between the aforementioned components.
  • the communication interface 930 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, a wireless access network, and a wireless local area network.
  • the memory 920 may be a read-only memory or other type of static storage device that can store static information and instructions, a random access memory or other type of dynamic storage device that can store information and instructions, or it can be electrically erasable and programmable read-only Memory, read-only or other optical disk storage, optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer , But not limited to this.
  • the memory 920 may exist independently and is connected to the processor 910 through a bus.
  • the memory 920 may also be integrated with the processor 910.
  • the memory 920 is configured to store application program code that executes the solution of the present application, and is controlled and executed by the processor 910.
  • the processor 910 is configured to execute application program code stored in the memory 920, so as to implement the load balancing method provided by the foregoing embodiment of the present application.
  • the processor 910 may perform related functions in the load balancing method provided by the foregoing embodiments of the present application, and the communication interface 930 is responsible for communicating with other devices or communication networks. This is not specifically limited.
  • the processor 910 may include one or more CPUs.
  • the network device may include multiple processors.
  • processors can be a single-core processor or a multi-core processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the communication interface may be an input / output interface.
  • this embodiment of the present application further provides a load balancing device, which is used to implement the function of the second radio access network node in the foregoing method embodiment.
  • This device may be the second wireless access node in the foregoing method embodiment.
  • the network access node may also be a chip provided in the second radio access network node.
  • the device may include a processor 1010, a memory 1020, and a communication interface 1030.
  • the device may further include a bus 1040.
  • the processor 1010 may be configured to execute instructions in the memory 1020, and implement the functions of the second radio access network node in the foregoing method embodiment through the communication interface 1030.
  • the device When the device is a first radio access network node, as shown in FIG. 10, the device may include a processor 1010, a memory 1020, and a communication interface 1030. Optionally, the device may further include a bus 1040.
  • the processor 1010 may be configured to execute an instruction in the memory 1020, and implement the function of the first radio access network node in the foregoing method embodiment through the communication interface 1030.
  • the processor 1010 may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the solution of the present application.
  • the communication bus 1040 may include a path for transmitting information between the aforementioned components.
  • the communication interface 1030 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, a wireless access network, and a wireless local area network.
  • the memory 1020 may be a read-only memory or other type of static storage device that can store static information and instructions, a random access memory or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only device Memory, read-only or other optical disk storage, optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer , But not limited to this.
  • the memory 1020 may exist independently and is connected to the processor 1010 through a bus.
  • the memory 1020 may also be integrated with the processor 1010.
  • the memory 1020 is configured to store application program code for executing the solution of the present application, and the processor 1010 controls execution.
  • the processor 1010 is configured to execute application program code stored in the memory 1020, so as to implement the load balancing method provided by the foregoing embodiment of the present application.
  • the processor 1010 may also perform related functions in the load balancing method provided by the foregoing embodiments of the present application, and the communication interface 1030 is responsible for communicating with other devices or communication networks. This is not specifically limited.
  • the processor 1010 may include one or more CPUs.
  • the network device may include multiple processors.
  • processors can be a single-core processor or a multi-core processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the communication interface may be an input / output interface.
  • An embodiment of the present application provides a communication system including the device shown in FIG. 9 and the device shown in FIG. 10.
  • An embodiment of the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer instructions. When the instructions are run on a computer, the computer is caused to execute the first radio access network node in the foregoing method embodiment. Or a function of a second radio access network node.
  • the embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the functions of the first radio access network node or the functions of the second radio access network node in the foregoing method embodiment. .
  • a computer program product containing instructions, which when executed on a computer, causes the computer to execute the functions of the first radio access network node or the functions of the second radio access network node in the foregoing method embodiment.

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Abstract

本申请公开了一种负载均衡方法及装置。在该方法中，第一无线接入网节点接收第二无线接入网节点发送的该第二无线接入网节点的第一负载类型的负载信息，其中，第一负载类型包括以下一种或多种：网络切片负载、V2X负载、SUL负载；第一无线接入网节点获取所述第一负载类型的负载信息。由于该方法中考虑到了网络切片负载、V2X负载、UL/SUL负载各自的负载，与现有的负载均衡方法相比，考虑的负载信息是粒度较细的负载信息，能够针对某个网络切片的负载情况或针对V2X业务的负载或针对UL/SUL的负载情况进行负载均衡，能够适用于与NR***或未来其他***中的负载均衡需求，有助于提高负载均衡的成功率以及***效率。

Description

一种负载均衡方法及装置
相关申请的交叉引用
本申请要求在2018年09月29日提交中国专利局、申请号为201811152773.6、申请名称为“一种负载均衡方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种负载均衡方法及装置。
背景技术
LTE所定义的负荷均衡功能(load balancing)是指eNB之间通过交换负荷信息，自动调节与移动性相关的参数，实现业务或者终端设备在不同eNB之间的均匀分布。
在新空口(new radio，NR)***中，引入了补充上行(supplementary uplink，SUL)，即网络设备(如基站、发送接收点等)与终端设备之间存在一个下行(downlink，DL)载波和两个上行载波，分别为常规上行(normal uplink，UL)载波和SUL载波。相应的，还引入了SUL的门限，即，当终端设备初始随机接入时，终端设备根据测量到的信号强度与UL的门限、SUL的门限进行比较，从而确定使用UL还是SUL与网络设备进行上行传输。在切换场景中，网络设备可以通过无线资源控制(radio resource control，RRC)信令指示终端设备切换到新的小区后使用UL和/或SUL。
NR***中还引入了车联万物(vehicle to everything，V2X)业务。V2X是未来智能交通运输***的关键技术，V2X的应用可以包括车与车、车与路侧基础设施、车与行人以及车与应用服务器等。V2X的应用能够改善驾驶安全性、减少拥堵和车辆能耗、提高交通效率和车载娱乐信息等。
此外，NR***中还引入了网络切片(Network Slice，NS)的概念，以应对不同通信业务对网络性能需求的差异的应用场景。网络切片可以是一个包括了终端设备、接入网、传输网、核心网和应用服务器的完整的端到端网络，能够提供完整的通信服务，具有一定网络能力；网络切片也可以是上述终端设备、接入网、传输网、核心网和应用服务器的任意组合。
现有的负载均衡方法仅考虑基站(或小区)的整体负载情况，粒度较粗，不适用于NR***中。
发明内容
本申请实施例提供一种负载均衡方法及装置，用于实现较细粒度的负载均衡。
第一方面，本申请实施例提供了一种负载均衡方法，包括：
第一无线接入网节点接收来自于第二无线接入网节点的第一消息，所述第一消息中包含所述第二无线网节点的第一负载类型的负载信息，所述第一负载类型包括以下任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；所述第一无线接入 网节点获取所述第一负载类型的负载信息。
所述第一无线接入网节点获取所述第一负载类型的负载信息在上述方法中，第一无线接入网节点根据获取到的第二无线接入网节点的第一负载类型的负载信息进行处理，即，进行负载均衡。由于本申请实施例提供的负载均衡方法中考虑到了网络切片负载、V2X负载、UL/SUL负载各自的负载，与现有的负载均衡方法相比，考虑的负载信息是粒度较细的负载信息，能够针对某个网络切片(组)的负载情况或者针对V2X业务的负载或者针对UL/SUL的负载情况进行负载均衡，能够适用于与NR***或未来其他***中的负载均衡需求，有助于提高负载均衡的成功率以及***效率。
在一种可能的实现方式中，所述第一无线接入网节点向所述第二无线接入网节点发送第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。在上述实施例中，第一无线接入网节点可以先向第二无线接入网节点发送获取第一负载类型的负载信息的请求，第二无线接入网节点在接收到请求后，将第一负载类型的负载信息发送给第一无线接入网节点。当然，第一无线接入网节点也可以不发送第一请求，第二无线接入网节点可以根据协议规定主动向第一无线接入网节点上报第一负载类型的负载信息。
在一种可能的实现方式中，所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者，所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
在一种可能的实现方式中，所述网络切片负载的负载信息包括：单一网络切片的标识和所述单一网络切片的负载情况、和/或网络切片组的标识和所述网络切片组的负载情况；和/或，所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；和/或，所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
在一种可能的实现方式中，所述负载信息包括对以下任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
在一种可能的实现方式中，所述测量结果包括测量值和/或过载指示信息。
在一种可能的实现方式中，所述第一无线接入网节点根据所述第一类型的负载情况进行处理，包括：所述第一无线接入网节点向所述第二无线接入网节点发送第二请求，所述第二请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述第二请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。第一无线接入网节点在向第二无线接入网节点发送用于请求的请求时，在请求中增加了第一负载类型的指示信息，以使第二无线接入网节点根据第二无线接入网节点当前的第一负载类型的负载信息，确定是否接收来自第一无线接入网节点的终端设备，有助于提高切换成功率。
在一种可能的实现方式中，所述第一无线接入网节点为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，所述第一无线接入网节点为DU，所述第二无线接入网节点为CU；所述CU具有以下一种或多种协议层：分组数据汇聚协议、无线资源控制、业务数据适配协议；所述DU具有以下一种或多种协议层：无线链路层控制协议、媒 体访问控制层、物理层；所述CU和DU属于同一个无线基站。
在一种可能的实现方式中，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者，所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
在一种可能的实现方式中，所述第一无线接入网节点为控制面集中单元无线接入网节点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；所述CU-CP和CU-UP属于同一个无线基站。
在一种可能的实现方式中，所述CU-UP的第一负载类型的负载信息包括所述第一负载类型的硬件负载和/或所述第一负载类型的传输负载；或者，所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
第二方面，本申请实施例提供了一种负载均衡方法，包括：
第二无线接入网节点向第一无线接入网节点发送第一消息，所述第一消息中包含第一负载类型的负载信息，所述第一负载类型包括以下一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载。
在一种可能的实现方式中，该方法还包括：所述第二无线接入网节点接收来自于所述第一无线接入网节点的第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。
在一种可能的实现方式中，所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者，所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
在一种可能的实现方式中，所述网络切片负载的负载信息包括单一网络切片的标识和所述单一网络切片的负载情况、和/或网络切片组的表述和所述网络切片组的负载情况；和/或，所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；和/或，所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
在一种可能的实现方式中，所述负载情况包括对以下任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
在一种可能的实现方式中，所述测量结果包括测量值和/或过载指示信息。
在一种可能的实现方式中，该方法还包括：所述第二无线接入网节点接收来自所述第一无线接入网节点的请求，所述请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。
在一种可能的实现方式中，所述第一无线接入网节点为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，所述第一无线接入网节点为DU，所述第二无线接 入网节点为C。
所述CU具有以下一种或多种协议层：分组数据汇聚协议、无线资源控制、业务数据适配协议；所述DU具有以下一种或多种协议层：无线链路层控制协议、媒体访问控制层、物理层；所述CU和所述DU属于同一个无线基站。
在一种可能的实现方式中，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者，所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
在一种可能的实现方式中，所述第一无线接入网节点为控制面集中单元无线接入网节点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；所述CU-CP和所述CU-UP属于同一个无线基站。
在一种可能的实现方式中，所述CU-UP的第一负载类型的负载信息包括所述第一负载类型的硬件负载和/或所述第一负载类型的传输负载；或者，所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
第三方面，本申请实施例提供了一种负载均衡方法，包括：
第一无线接入网节点向第二无线接入网节点发送第二消息，所述第二消息用于请求所述第二无线接入网节点修改所述第二无线接入网节点的第一负载类型的移动性参数，所述第一负载类型包括以下一种或多种：网络切片负载、车联万物V2X负载、补充上行链路SUL负载；所述第二无线接入网节点根据所述第二消息，对所述第二无线接入网节点的移动性参数进行修改，并向所述第一无线接入网节点发送响应。
在一种可能的实现方式中，所述移动性参数信息包括切换触发更改信息。
在一种可能的实现方式中，所述消息中包括：请求所述第二无线接入网节点修改的第一负载类型的移动性参数信息。
在一种可能的实现方式中，所述响应中包括用于指示所述第二无线接入网节点成功修改移动性参数的指示信息；或者，所述响应中包括所述第二无线接入网节点的第一负载类型的移动性参数修改范围。
在一种可能的实现方式中，所述网络切片负载包括单一网络切片的负载和/或网络切片组的负载；和/或，所述V2X负载包括以下一种或多种：V2X业务在空口的负载，V2X业务在侧行链路的负载，V2X业务中各个频率的负载，V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同服务质量QoS的业务的负载。
第四方面，本申请实施例提供了一种负载均衡装置，用于执行上述第一方面以及第一方面中任一种可能的实现方法。示例性地，该负载均衡装置可以包括用于执行第一方面以及第一方面中任一种可能的实现方法的单元。
第五方面，本申请实施例提供了一种负载均衡装置，用于执行上述第二方面以及第二方面中任一种可能的实现方法。示例性地，该负载均衡装置可以包括用于执行第二方面以及第二方面中任一种可能的实现方法的单元。
第六方面，本申请实施例提供了一种通信***，包括如第四方面所述的装置和如第五方面所述的装置。
第七方面，本申请实施例提供了一种负载均衡装置，用于执行上述第三方面以及第三方面中任一种可能的实现方法。示例性地，该负载均衡装置可以包括用于执行第三方面以及第三方面中任一种可能的实现方法的单元。
第八方面，本申请实施例提供了一种负载均衡装置，该装置可以为上述第一方面中任一种可能的实现方式中的第一无线接入网节点，或者，可以为设置在第一无线接入网节点中的芯片。该装置包括：处理器，与存储器、通信接口耦合，可用于执行存储器中的指令，通过所述通信接口实现上述第一方面中任一种可能的实现方法。
第九方面，本申请实施例提供了一种负载均衡装置，该装置可以为上述第二方面中任一种可能的实现方法中的第二无线接入网节点，或者，可以为设置在第二无线接入网节点中的芯片。该装置包括：处理器，与存储器、通信接口耦合，可用于执行存储器中的指令，通过所述通信接口实现上述第二方面中任一种可能的实现方法。
第十方面，本申请实施例提供了一种通信***，包括如第六方面所述的装置和如第七方面所述的装置。
第十一方面，本申请实施例提供了一种负载均衡装置，该装置可以为上述第三方面中任一种可能的方式中的第一无线接入网节点，或者，可以为设置在第一无线接入网节点中的芯片。该装置包括：处理器，与存储器、通信接口耦合，可用于执行存储器中的指令，通过所述通信接口实现上述第三方面中任一种可能的实现方法。
第十二方面，本申请实施例提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行如第一方面至第三方面中任一项所述方法。
第十三方面，本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如第一方面至第三方面中任一项所述方法。
附图说明
图1为本申请实施例提供的UL/SUL的场景示意图；
图2为本申请实施例提供的负载均衡方法的流程示意图之一；
图3a为本申请实施例提供的适用于本申请的网络架构示意图之一；
图3b为本申请实施例提供的适用于本申请的网络架构示意图之二；
图3c为本申请实施例提供的适用于本申请的网络架构示意图之三；
图4为本申请实施例提供的负载均衡方法的流程示意图之二；
图5为本申请实施例提供的负载均衡方法的流程示意图之三；
图6为本申请实施例提供的负载均衡装置的结构示意图之一；
图7为本申请实施例提供的负载均衡装置的结构示意图之二；
图8为本申请实施例提供的负载均衡装置的结构示意图之三；
图9为本申请实施例提供的负载均衡装置的结构示意图之四；
图10为本申请实施例提供的负载均衡装置的结构示意图之五。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
负载均衡(load balancing)的目的是，控制不均衡的业务分布，实现业务负载在不同小区之间的均衡分布；保持较高的无线资源利用率，提高***容量。在进行负载均衡时，需要考虑被均衡后的正在进行的业务的服务质量(quality of service，QoS)不会降低，保持较小的呼叫掉话率，将切换、重定向的次数最小化，将人工干预最小化。
经过负载均衡，实现了选择合适的终端设备切换到负载相对较轻的同频或异频邻小区，缓解了小区间负载不平衡的状态，有助于提升业务的接入成功率，改善用户的业务感受，提高***资源利用率。
在现有的负载均衡方法中，网络设备根据当前小区和邻小区的负载状况优化移动性参数；通过算法决定终端设备的驻留分布，延迟或者提前触发终端设备的切换，达到各小区之间的负载均衡；考虑不同的***的服务能力；在网络管理和优化任务中实现最小化的人工干预。示例性地，基站可以检测小区的负载，并通过X2接口与其他基站交换负载信息，确定是否需要向相邻小区进行负载转移；小区间以协调的方式修改移动性参数(小区之间的切换参数或者小区重选参数等)；根据小区切换和重选机制，小区边缘的部分终端设备切换或重选到负载较轻的小区。
其中，小区的负载可以包括以下几个方面：
1、空口负载，即，网络设备与终端设备之间的接口上的负载，可以通过物理资源块(physical resource block，PRB)利用率、上行同步状态的终端设备的数量来衡量。
2、硬件负载，可以通过基带板中央处理器(central processing unit，CPU)利用率、数字信号处理器(digital signal processing，DSP)利用率来衡量。可选地，可以对CPU、DSP的利用率进行等级划分，如轻负载(low load)，中负载(medium load)，高负载(high load)和过载(over load)，使用等级表示小区的负载状态。
3、传输网络层(transport network layer，TNL)负载，基站可以对S1接口的宽度的使用情况进行评估，例如评估带宽利用率，确定当前传输网络层负载的等级，传输网络层负载的等级也可以分为轻负载，中负载，高负载和过载。
在负载均衡的过程中，源小区表示触发负载均衡、需要向外转移负载的小区，亦可称为服务小区；目标小区表示将接纳源小区负载的邻小区；候选邻小区表示满足负载均衡对邻小区的选择条件可以成为目标小区的异频或同频小区。
而在NR***中，由于引入了UL/SUL的概念，因此，在终端设备的切换过程中，将涉及到目标基站(或目标小区)中UL、SUL的选择，如图1所示。为切换的终端设备选择UL还是SUL与目标基站进行通信，以提高切换的成功率。
同样的，NR***中还引入了网络切片、V2X的概念，因此，在终端设备的切换过程中，也需要考虑目标基站中目标网络切片的选择，以及考虑目标基站中V2X业务的负载情况。
显然，现有的负载均衡方法可能不再能够满足NR***的负载均衡的需求。因此，本申请实施例提供了一种负载均衡方法，用于实现较细粒度的负载均衡，即，可以满足对UL/SUL、网络切片或V2X不同业务下的不同负载需求。本申请实施例提供的负载均衡方法可以应用于NR***，或未来其他的通信***中。
参见图2，为本申请实施例提供的负载均衡方法的流程示意图，如图所示，该方法可以包括以下步骤：
步骤201、第一无线接入网节点接收来自于第二无线接入网节点的第一消息，所述第一消息中包括该第二无线接入网节点的第一负载类型的负载信息。
其中，第一负载类型可以包括以下一种或多种：
网络切片负载：以网络切片或网络切片组为单位的负载情况，网络切片负载可以包括单一网络切片的负载和/或网络切片组的负载。例如，第二无线接入网节点可以针对该第二无线接入网节点中的每个网络切片，确定每个网络切片的负载信息，然后将每个网络切片的负载信息发送给第一无线接入网节点。又例如，第二无线接入网节点可以针对该第二无线接入网节点中的每个网络切片组，确定每个网络切片组的负载信息，然后将每个网络切片组的负载信息发送给第一无线接入网节点。可选的，网络切片负载还可以包括每个网络切片(组)中具有相同QoS需求的业务的负载；例如，第二无线接入网节点可以针对每个网络切片中确定该网络切片中每一种QoS需求下的全部业务的负载信息，并发送给第一无线接入网节点。在一种可能的实现方式中，若第二无线接入网节点已预先获取到第一无线接入网节点所支持的网络切片，则第二无线接入网节点可以将该第二无线接入网节点中与第一无线接入网节点支持的网络切片类型相同的网络切片的负载信息发送给第一无线接入网节点。第二无线接入网节点在发送网络切片负载的负载信息时，可以将网络切片(组)的标识以及该网络对应的负载信息发送给第无线接入网节点。
V2X负载：以V2X业务为单位的负载情况，V2X负载还可以包括以下一种或多种负载：V2X业务总负载、V2X业务在空口的负载、V2X业务在侧行链路(sidelink)的负载、V2X各个频点下业务的负载、V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同QoS需求的业务的负载。例如，第二无线接入网节点可以确定该第二无线接入网节点正在提供的全部V2X业务的负载信息，并发送给第一无线接入网节点。例如，V2X业务可能占用空口资源(即网络设备与终端设备之间的链路)，也可能占用侧行链路上的资源(即终端设备之间的链路)，第二无线接入网节点可以确定占用空口资源的V2X业务的负载，也可以确定占用侧行链路资源的V2X业务的负载，并发送给第一无线接入网节点。又例如，V2X业务可以使用一个或多个频点，第二无线接入网节点可以针对V2X业务所使用的每个频点，确定工作在该频点下的V2X业务的负载信息，并发送给第一无线接入网节点。再例如，不同的V2X业务可能具体不同的QoS需求，第二无线接入网节点可以针对具有相同QoS需求的V2X业务，确定其负载信息并发送给第二无线接入网节点。
UL/SUL负载：以UL和/或SUL为单位的负载情况。第二无线接入网节点可以通过UL资源和/或SUL资源，与终端设备进行上行传输时，第二无线接入网节点可以分别确定使用UL进行上行传输的业务的负载信息以及使用SUL进行上行传输的业务的负载信息，并发送给第一无线接入网节点，可选地，SUL负载的负载信息还可以包括SUL中每个频点上的负载，即第二无线接入网节点将频点信息和该频点下的负载情况发送给第一无线接入网节点。
步骤202、第一无线接入网节点获取上述第一负载类型的负载信息。
在上述方法中，第一无线接入网节点可以根据获取到的第二无线接入网节点的第一负载类型的负载信息进行处理，即，进行负载均衡。由于本申请实施例提供的负载均衡方法 中考虑到了网络切片负载、V2X负载、UL/SUL负载各自的负载，与现有的负载均衡方法相比，考虑的负载信息是粒度较细的负载信息，能够针对某个网络切片(组)的负载情况或者针对V2X业务的负载或者针对UL/SUL的负载情况进行负载均衡，能够适用于与NR***或未来其他***中的负载均衡需求，有助于提高负载均衡的成功率以及***效率。
第二无线接入网节点针对上述每种类型确定出的负载情况，可以包括对以下任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载(HW load)、传输网络层负载(TNL load)、参考信号接收功率(例如接收到的终端设备发送的RSRP测量报告)、无线资源状态(例如物理资源块(physical resource block，PRB)利用率，包括上下行的总的PRB利用率，上下行的保证比特速率(Guaranteed Bit Rate，GBR)的或non GBR的PRB利用率，上下行的调度控制信道元素(control channel Element，CCE)利用率等)、几乎空白指针(almost blank subframe，ABS)状态、可用资源、信道状态(例如接收到的信道状态信息(channel status information，CSI)报告)、可用容量/资源(composite available capacity，CAC)。
其中，接入终端设备可以指激活态终端设备的数量、空闲态终端设备的数量或去激活态终端设备的数量，当然也可以是上述三种状态的终端设备中的两种或三种终端设备的总数量。
在一种可能的实现方式中，第二无线接入网节点向第一无线接入网节点发送的针对上述一种或多种测量对象得到的测量结果，可以是具体的测量值，也可以是负载等级，还可以是过载指示。以第二无线接入网节点向第一无线接入网节点发送的负载信息中包括对PRB利用率的测量结果为例，若PRB利用率超过95％为过载，80％～95％为高负载，而第二无线接入网节点测得该第二无线接入网节点的PRB利用率为90％，属于高负载，但未过载，那么第二无线接入网节点可以将90％的测量值发送给第一无线接入网节点，也可以将高负载的等级信息发送给第一无线接入网节点，还可以将非过载的指示信息发送给第一无线接入网节点；若第二无线接入网节点测得PRB利用率为96％，第二无线接入网节点可以将96％的测量值发送给第一无线接入网节点，也可以将过载的等级信息发送给第一无线接入网节点，还可以将过载的指示信息发送给第一无线接入网节点。
在确定PRB利用率时，考虑到可能存在多种配置参数集(numerology)，本申请实施例还提供了一种确定PRB利用率的方法，即PRB利用率可以根据下述公式确定出：
Figure PCTCN2019106247-appb-000001
其中，Band表示接入网络设备包含的全部BWP所占中带宽，Band(i)表示第i个BWP所占带宽，PRB(i)表示在第i个BWP上的PRB利用率，该PRB(i)的算法与现有的PRB算法类似。
在另一种可能的实现方式中，第二无线接入网节点也可以不向第一无线接入网节点发送每种测量对象的测量结果，而是在对测量对象进行测量后，针对各种测量对象的测量结果，确定是否过载，并将是否过载的指示信息发送给第一无线接入网节点。例如，可以规定每种测量对象的测量结果中只要有一种过载，则确定第二无线接入网节点过载，则将过载的指示信息发送给第一无线接入网节点；也可以规定每种测量对象的测量结果均过载则认为第二无线接入网节点过载，则将过载的指示信息发送给第一无线接入网节点；还可以规定需要测量的多种测量对象中有大于等于N种过载，则确定第二无线接入网节点；此外，还可以对每种测量对象设置相应的权重，从而根据每种测量对象的测量结果确定第二无线 接入网节点是否过载。
可选地，若第一负载类型包括UL和SUL的负载，第二无线接入网节点可以向第一无线接入网节点发送分别针对UL和SUL中的各种测量对象的测量结果；也可以发送分别针对UL和SUL的过载指示；此外，还可以针对UL和SUL统一测量各自测量对象，然后将统一的测量结果发送给第一无线接入网节点；还可以发送针对UL和SUL的统一的是否过载的指示信息，不必再针对UL和SUL分别指示是否过载，即，若指示信息表示过载，则表示UL和SUL过载。
此外，针对网络切片负载，第二无线接入网节点还可以从核心网获取到的网络切片过载指示发送给第一无线接入网节点。
在一种可能的实现方式中，第一无线接入网节点可以向第二无线接入网节点发送第一信息，以获取第二无线接入网节点的第一负载类型的负载信息，即，第二无线接入网节点是在接收到第一无线接入网节点发送的第一信息后，对第一信息进行响应，将第二无线接入网节点的第一负载类型的负载信息携带在响应消息中发送给第一无线接入网节点。
可选的，上述第一信息中可以包括第一负载类型的指示信息，即指示第一无线接入网节点请求获取第二无线接入网节点的哪种负载类型的负载信息。例如，若第一信息中包括网络切片或网络切片组的指示信息，则第二无线接入网节点将每个网络切片或每个网络切片组的负载信息发送给第一无线接入网节点；若第一信息中包括V2X业务在空口和/或V2X业务在侧行链路的指示信息，则第二无线接入网节点将V2X业务在空口的负载信息和V2X业务在侧行链路的负载信息发送给第一无线接入网节点；若第一信息中包括SUL的指示信息，则第二无线接入网节点将SUL上的负载信息发送给第一无线接入网节点。又例如，若第一信息中缺省了第一负载类型的指示信息，可以认为第一无线接入网节点请求获取每种类型的负载信息，即，第一负载类型包括前述的全部负载类型；或者，也可以将默认的第一负载类型的负载信息发送给第一无线接入网节点，例如，可以将粒度较大的网络切片负载、V2X负载、UL/SUL负载设置为默认的第一负载类型。
可选地，上述第一信息中还可以包括测量对象，即，第二无线接入网节点针对第一负载类型，对第一信息中包含的测量对象进行测量，并将测量结果发送给第一无线接入网节点。例如，如请求中包含的第一负载类型的指示信息为SUL负载，第一信息中包含的测量对象包括PRB利用率，则第二无线接入网节点对SUL的PRB利用率进行测量，第二无线接入网节点向第一无线接入网节点发送的第一负载类型的负载信息中包括对SUL中的PRB利用率的测量结果。
在一些实施例中，上述第一信息中还可以指示第二无线接入网节点周期性地向第一无线接入网节点发送负载信息，即，第一信息中还可以包括周期信息。例如，第一无线接入网节点可以请求第二无线接入网节点每5分钟向第一无线接入网节点发送第一负载类型的负载信息，则第一信息中包括用于指示发送周期为5分钟的指示信息。可选的，不同的测量对象可以有不同的周期信息。
在另外一些实施例中，上述第一信息中也可以指示第二无线接入网节点在满足触发条件时向第一无线接入网节点发送负载信息，即第一信息中可以包括触发条件信息。其中，触发条件可以包括第一负载类型的负载信息达到门限值，或者第一负载类型的负载达到预设的负载等级，或第一负载类型的负载等级发生变化等。例如，若第一负载类型为网络切片负载，触发条件可以为网络切片的负载等级发生变化等网络切片粒度的事件发生，也可 以为网络切片的PRB利用率或其他测量对象的测量值达到预设门限等。可选的，不同的测量对象可以有不同的触发条件信息，例如若第一负载类型为网络切片负载，对于不同的测量对象(例如PRB、TNL load、HW load等)的触发条件信息是不同的。
可选的，上述触发条件中还可以包括UL与SUL的差值门限，即，第一无线接入网节点指示第二无线接入网节点，在UL与SUL的测量对象的测量值大于或等于上述门限时，则上报UL和SUL的负载信息，或者，上报UL和SUL中负载较高的上行载波的负载信息。
此外，第一信息中还可以包括请求获取的小区标识，即，第二无线接入网节点将第一信息中包含的小区标识所对应的小区的负载信息发送给第一无线接入网节点。
可选的，第二无线接入网节点发送的响应消息中，还可以包括测量失败的指示信息，该测量失败的指示信息中可以包括以下任一种或任多种组合：测量失败的小区、测量失败的原因、测量失败的测量对象、测量失败的负载类型。例如，第一信息用于请求获取SUL负载和网络切片负载，针对每种负载测量PRB利用率以及传输网络层负载；若第二无线接入网节点对PRB利用率测量成功，对传输网络层负载测量失败，那么第二无线接入网节点向第一无线接入网节点发送的响应消息中可以包括SUL中PRB利用率的测量结果、网络切片中PRB利用率的测量结果以及传输网络层负载测量失败的指示信息；若第二无线接入网节点对SUL中的PRB利用率和传输网络层负载均测量成功，而对网络切片中的PRB利用率和传输网络层负载均测量失败，那么第二无线接入网节点向第一无线接入网节点发送的响应消息中可以包括对SUL中的PRB利用率、传输网络层负载的测量结果，以及网络切片负载测量失败的至少信息；若第二无线接入网节点仅对网络切片中的传输网络层负载测量设备，那么第二无线接入网节点中可以包括对网络切片中的传输网络层负载测量失败的指示信息以及其他成功测量的测量结果。
在一个具体实施例中，第一无线接入网节点可以向第二无线接入网节点发送第一信息，该第一信息中包含的信息可以如表1所示；第二无线接入网节点根据第一信息，向第一无线接入网节点发送响应消息，该响应消息中包含第一信息所请求获取的第一负载类型的负载信息，如表2a、表2b、表2c所示。
表1
Figure PCTCN2019106247-appb-000002
Figure PCTCN2019106247-appb-000003
示例性的，表1仅为举例，第一信息中包含的负载类型可以为前述负载类型中的任意一种或多种，测量对象也可以是前述测量对象中的任意一种或多种，本申请对此不作限定。发送周期还可以针对每组负载类型设置的，还可以是统一的发送周期；触发条件还可以是针对每种负载类型设置的，还可以将门限替换为负载等级变化、是否过载等。根据不同场景的需求，第一信息可以包括比表1中更多或更少的指示信息。
表2a
Figure PCTCN2019106247-appb-000004
上述表2a示例性的给出了第二无线接入网节点发送的网络切片负载的负载信息，如表2a所示，第二无线接入网节点发送的负载信息包括表中所示的网络切片列表中的网络切片的接入终端设备的数量、硬件负载、S1接口上的传输网络层负载、无线资源状态、CAC、ABS状态、RSRP测量报告、CSI报告、小区上报指示。当然，根据不同的第一信息，关于网络切片的负载信息还可以包括比表2a中更多或更少的负载信息。可选的，上述表中还可以包括测量失败的原因、测量失败的测量对象、测量失败的负载类型中的任一种或多种。
表2b
Figure PCTCN2019106247-appb-000005
上述表2b示例性的给出了第二无线接入网节点发送的UL(还可以是非UL、SUL、UL和SUL)的负载信息，如表2b所示，第二无线接入网节点发送的负载信息包括表中所示的网络切片列表中的网络切片的接入终端设备的数量、硬件负载、S1接口上的传输网络层负载、无线资源状态、CAC、ABS状态、RSRP测量报告、CSI报告、小区上报指示。当然，根据不同的第一信息，关于上行载波的负载信息还可以包括比表2b中更多或更少的负载信息。可选的，上述表中还可以包括测量失败的原因、测量失败的测量对象、测量失败的负载类型中的任一种或多种。
表2c
Figure PCTCN2019106247-appb-000006
上述表2c示例性的给出了第二无线接入网节点发送的V2X频点的负载信息，如表2c所示，第二无线接入网节点发送的负载信息包括表中所示的网络切片列表中的网络切片的接入终端设备的数量、硬件负载、S1接口上的传输网络层负载、无线资源状态、CAC、ABS状态、RSRP测量报告、CSI报告、小区上报指示。当然，根据不同的第一信息，关于V2X业务的负载信息还可以包括比表2c中更多或更少的负载信息。可选的，上述表中 还可以包括测量失败的原因、测量失败的测量对象、测量失败的负载类型中的任一种或多种。
当然，第一无线接入网节点也可以不向第二无线接入网节点发送第一信息，由第二无线接入网节点自行决定是否向第一无线接入网节点发送负载信息。例如，若通信协议规定中规定了第二无线接入网节点周期性的或在满足触发条件时向第一无线接入网节点发送该第二无线接入网节点的第一负载类型的负载信息，那么第二无线接入网节点可以根据协议中规定的周期或者满足触发条件时向第一无线接入网节点发送第一负载类型的负载信息。在这种情况下，第一负载类型可以是默认的负载类型，如协议规定的负载类型。例如，第一负载类型可以包括上述全部的负载类型，也可以仅包括较大粒度的网络切片负载、V2X负载以及UL/SUL负载。
一种可能的实现方式，第一无线接入网节点可以向第二无线接入网节点发送请求，以请求将第一无线接入网节点所服务的终端设备切换至第二无线接入网节点。例如，第一无线接入网节点根据自身的负载信息，确定V2X业务在空口上的负载已过载，而第二无线接入网节点的V2X业务在空口上的负载较轻，则请求将第一无线接入网节点所服务的具有V2X业务的终端设备切换至第二无线接入网节点。
可选地，上述请求中可以包括第一负载类型，以指示切换的原因，即，切换的原因值可以包括公共的负载均衡(不区分负载类型的负载均衡)和/或第一负载类型的负载均衡，其中，第一负载类型的负载均衡包括网络切片类型的负载均衡、上行载波类型的负载均衡和V2X类型的负载均衡中的任一种或多种。例如，第一无线接入网节点发送的切换请求中包括V2X类型的负载均衡的原因值的指示信息，以表示此次切换是由于第一无线接入网节点的V2X负载过载而请求切换；则第二无线接入网节点可以根据此信息进行切换准入控制，如第二无线接入网节点可以根据该V2X负载的指示信息，推断请求切换至第二无线接入网节点的终端设备可能有V2X业务，第二无线接入网节点可以根据自身当前的V2X业务的负载，确定是否接收请求切换的终端设备。
本申请提供的上述负载均衡的方法，可以应用于如图3a所示的网络架构中，其中，上述第一无线接入网节点可以为NR***中的第一通用型基站(general node B，gNB)，第二无线接入网节点为与第一gNB相邻的第二gNB。gNB之间可以通过Xn接口进行数据传输，即，第一gNB可以通过Xn接口向第二gNB发送用于获取负载信息的第一信息以及用于切换的请求，第二gNB可以通过Xn接口向第一gNB发送该第二gNB的第一负载类型的负载信息。示例性的，第二gNB发送的第一负载类型的负载信息，可以通过XnAP消息发送，如终端设备关联信令消息(UE-associated)或非终端设备关联信令消息(non UE-associated)，示例性的，可以通过资源状态请求(resource status request)、资源状态响应(resource status response)、资源状态失败(resource status failure)或资源状态更新(resource status update)消息发送，当然，也可以定义新的Xn接口消息发送上述负载信息。
在另一种可能的实现方式中，第一无线接入网节点还可以根据第二无线接入网节点的第一负载类型的负载信息，确定小区切换参数和/或专用优先级，并发送给第一无线接入网节点所服务的终端设备，以使终端设备根据小区重选参数和/或专用优先级进行小区重选。其中小区重选参数以及专用优先级将在后面实施例中详细介绍。
上述方法还可以适用于如图3b所示的分布式基站，其中，gNB可以包括集中式单元无线接入网节点(central unit，CU)和至少一个分布式单元无线接入网节点(distributed unit， DU)，CU和DU之间可以通过F1接口进行通信，CU和CU之间可以通过Xn接口进行通信。一种可能的实现方式，在CU中设置分组数据汇聚协议(packet data convergence protocol，PDCP)层以上的功能，如PDCP、无线资源控制(radio resource control，RRC)、业务数据适配协议层(service data adaptation protocol，SDAP)等，在DU中设置PDCP层以下的功能，如无线链路层控制协议(radio link control，RLC)、媒体访问控制层(media access control，MAC)、物理层(physical layer，PHY)等。
第一无线接入网节点可以为gNB中的第一CU，第二无线接入网节点可以为相邻gNB中的第二CU。在该实施例中第一CU与第二CU之间的交互过程与前述实施例类似，而第二CU发送的第一负载类型的负载信息，可以是该第二CU的负载信息，或者，该第二CU以及该第二CU所管理的一个或多个DU的负载信息。例如，第一CU请求获取相邻小区1的PRB利用率，则第二CU确定相邻小区1为第二CU管理的DU3下的小区，则第二CU从DU3获取该小区1的PRB利用率，并发送给第一CU；可选的，第一CU可以把所获取的相邻小区1的PRB利用率发送给第一CU所管理的一个或多个DU；可选的，第二CU获取小区1的PRB利用率这一过程，也可以在第二CU接收到第一CU的请求之前，如DU3周期性或在触发条件得到满足时的将DU3下的小区的负载信息发送给第二CU。又例如，第一CU请求获取第二CU的V2X业务的PRB利用率，第二CU预先获取该第二CU管理的每个DU中具有V2X业务的PRB利用率，然后，第二CU根据第二CU管理的每个DU的V2X业务的PRB利用率，确定该第二CU的V2X业务的PRB利用率，并发送给第一CU。第一无线接入网节点为gNB，第二无线接入网节点为相邻gNB的CU时，两个无线接入网节点之间的第一负载类型的负载信息的交互过程与上述类似，这里不再赘述。
此外，上述方法也可以应用于一个gNB中的CU与DU之间，即，第一无线接入网节点为CU、第二无线接入网节点为DU，或者，第一无线接入网节点为DU、第二无线接入网节点为CU。
以第一无线接入网节点为图3b所示的CU1、第二无线接入网节点为图3b所示的DU1为例，CU1可以向DU1发送第一信息，请求DU1周期性的上报第一负载类型的负载信息或者在满足触发条件时上报第一负载类型的负载信息。可选的，DU1也可以主动上报或更新第一负载类型的负载信息给CU1，此时，DU1可以自主决定周期或触发条件，以决定是否上报、如何上报。该第一信息中可以包括第一负载类型的指示信息、发送周期或触发条件等，与前述实施例类似，不再赘述。DU1根据第一信息，将DU1的第一负载类型的负载信息发送给CU1。或者，DU1也可以根据协议规定，根据预设周期向CU1发送负载信息或在触发条件满足时将负载信息发送给CU1。示例性的，DU1可以通过F1AP消息将第一负载类型的负载信息发送给CU1，如终端设备关联信令消息(UE-associated)或非终端设备关联信令消息(non UE-associated)，当然，也可以定义新的F1接口消息发送上述负载信息。
CU1在接收到DU1发送的关于第一负载类型的负载信息后，可以根据DU1的负载信息进行负载均衡。例如，若CU1根据DU1发送的UL/SUL的负载信息确定DU1的UL和SUL过载，或者接收到DU1发送的UL/SUL的过载指示信息，则可以将DU1中终端设备切换至CU1管理的其他DU中。若CU1管理的其他DU也负载较重，不适合接收切换的终端设备，而CU2管理的DU中的UL/SUL负载较轻，则CU1可以向CU2发送切换请求，请求将DU1中的终端切换至CU2中。
CU1还可以根据其管理的DU的负载信息，确定CU1的切换策略。例如，若CU1根据DU1、DU2…发送的负载信息确定当前CU1的负载比较重，若此时接收到CU2发送的切换请求，请求将CU2中的终端设备切换至CU1中，则CU1可以拒绝接受CU2中的终端设备。
当上述方法应用于CU与DU之间时，CU与DU之间交互第一负载类型的负载信息的过程，与前述基站与基站之间的交互过程类似。第一负载类型也与前述基站与基站之间交互的第一负载类型程类似，可以包括以下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的总负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X各个频点下业务的负载、V2X各个频点下空口的负载、V2X业务各个频点下侧行链路业务的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。若CU(或DU)还发送了第一信息，那么第一信息中可以包括以上一种或多种负载类型的指示信息，即第一负载类型的指示信息。
但每种负载类型下，测量的测量对象有所不同。当第一无线接入网节点为CU，第二无线接入网节点为DU时，DU发送的负载信息为DU能够测量的测量对象的测量结果，DU能够测量的测量对象可以包括以下一种或多种：无线资源状态、ABS状态、信道状态、CAC。当第一无线接入网节点为DU，第二无线接入网节点为CU时，CU发送的负载信息为CU能够测量的测量对象的测量结果，CU能够测量的测量对象可以包括以下一种或多种：硬件负载、传输网络层负载、参考信号接收功率(例如CU可以将接收到的RSRP测量报告发送给DU)。
在一种可能的实现方式中，当第一无线接入网节点为CU，第二无线接入网节点为DU时，若DU需要统计V2X业务的负载，CU还可以将V2X业务所支持的频点信息和/或QoS信息发送给DU。
CU和DU之间发送的第一负载类型的负载信息，可以通过F1AP消息发送，如终端设备关联信令消息(UE-associated)或非终端设备关联信令消息(non UE-associated)，示例性的，例如通过resource status request/response/failure/update消息发送，当然，也可以定义新的F1接口消息发送上述负载信息。
CU在获取到DU下各小区的负载信息后，可以根据这些负载信息，确定小区重选参数和/或专用优先级，并发送给DU；DU可以将小区重选参数和/或专用优先级广播给终端设备，以使终端设备根据小区重选参数和/或专用优先级进行小区重选。其中小区重选参数以及专用优先级将在后面实施例中详细介绍。
在一种可能的实现方式中，上述DU可以包括中继设备，即，上述方法可以应用于多跳中继场景，或者，DU与终端设备之间通过中继设备传输的场景。
在一种可能的实现方式中，上述CU、DU也可以是LTE的CU-DU分离架构中的CU、DU。
上述负载均衡的方法还可以适用于如图3c所示的分布式基站中，其中，CU被进一步划分为控制面集中式单元无线接入网节点(CU-CP)和用户面集中式单元无线接入网节点(CU-UP)，CU-CP与CU-UP之间可以通过E1接口进行通信，CU-CP与DU之间可以通过用户面F1-C接口进行通信，CU-UP与DU之间可以通过用户面F1-U接口进行通信，而CU-CP与CU-CP之间可以通过Xn接口进行通信。示例性的，本申请实施例中，CU-CP可以包括PDCP层和RRC层，CU-UP包括PDCP层和业务数据适配协议(service data  adaptation protocol，SDAP)层，示例性的，SDAP层可以负责QoS相关的接入，包括QoS流到DRB的路由、上下行QoS流的标识(ID)确认等等。
第一无线接入网节点可以为gNB中的第一CU-CP，第二无线接入网节点可以为相邻gNB中的第二CU-CP。在该实施例中，第一CU-CP和第二CU-CP之间的交互过程与基站与基站之间的交互过程、CU与CU之间的交互过程类似，不再赘述。而第二CU-CP发送的以辅助类型的负载信息，可以是该第二CU-CP的负载信息，也可以是该CU-CP的负载信息、该CU-CP管理的至少一个CU-UP的负载信息以及该CU-CP管理的至少一个DU的负载信息。此外，第一无线接入网节点还可以为gNB，第二无线接入网节点可以为相邻gNB的CU-CP，两个无线接入网节点之间的第一负载类型的负载信息的交互过程与上述类似，这里不再赘述。
此外，上述方法也可以应用于CU-CP与该CU-CP管理的CU-UP之间，即，第一无线接入网节点为CU-CP、第二无线接入网节点为CU-UP，或者，第一无线接入网节点为CU-UP、第二无线接入网节点为CU-CP。
以第一无线接入网节点为图3c所示的CU-CP1、第二无线接入网节点为图3c所示的CU-UP1为例，CU-CP1可以向CU-UP1发送第一信息，请求CU-UP1周期性的上报第一负载类型的负载信息或者在满足触发条件时上报第一负载类型的负载信息。可选的，CU-UP1也可以主动上报或更新第一负载类型给CU-CP1，此时，CU-UP1可以自主决定周期和触发条件，以决定是否上报、如何上报。该第一信息中可以包括第一负载类型的指示信息、发送周期或触发条件等(第一负载类型、发送周期、触发条件等于前述实施例类似，此处不再赘述)，CU-UP1根据第一信息，将CU-UP1的第一负载类型的负载信息发送给CU-CP1。或者，CU-UP1也可以根据协议规定，根据预设周期向CU-CP1发送负载信息或在触发条件满足时将负载信息发送给CU-CP1。示例性地，CU-UP1可以通过E1AP消息将第一负载类型的负载信息发送给CU-CP1，当然，也可以定义新的E1接口消息发送上述负载信息。
CU-CP1在接收到CU-UP1发送的关于第一负载类型的负载信息后，可以根据CU-UP1的负载信息进行负载均衡。例如，若CU-CP1根据DU1发送的V2X业务在空口的负载信息确定CU-UP1的V2X业务在空口的负载过载，或者接收到CU-UP1发送的V2X业务在空口的过载指示信息，则可以将CU-UP1所服务的终端设备切换至CU-CP1管理的其他CU-UP1中。若CU-CP1管理的其他CU-UP1也负载较重，不适合接收切换的终端设备，而CU-CP2管理的CU-UP1中的V2X业务在空口负载较轻，则CU-CP1可以向CU-CP2发送切换请求，请求将CU-UP1中的终端切换至CU-CP2中。
CU-CP1还可以根据其管理的CU-UP1的负载信息，确定CU-CP1的切换策略。例如，若CU1根据CU-UP1、CU-UP1…发送的负载信息确定当前CU-CP1的负载比较重，若此时接收到CU-CP2发送的切换请求，请求将CU-CP2中的终端设备切换至CU-CP1中，则CU-CP1可以拒绝接受CU-CP2中的终端设备。
当上述方法应用于CU-CP与CU-UP之间时，第一无线接入网节点与第二无线接入网节点之间交互的负载信息的负载类型，与基站之间交互的负载信息的负载类型没有区别，可以包括以下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X业务中同一频点的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。
但每种负载类型下，测量的测量对象有所不同。当第一无线接入网节点为CU-CP，第二无线接入网节点为CU-UP时，CU-UP发送的第一负载类型的负载信息可以包括第一负载类型的硬件负载和/或第一负载类型的传输网络层负载。当第一无线接入网节点为CU-UP，第二无线接入网节点为CU-CP时，CU-CP发送的第一负载类型的负载信息可以包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输网络层负载、第一负载类型的参考信号接收功率(例如CU-CP可以将接收到的RSRP测量报告发送给CU-UP)。
本申请实施例还提供了一种负载均衡方法，用于实现较细粒度的负载均衡，即，可以满足对UL/SUL、网络切片或V2X不同业务下的不同负载需求。本申请实施例提供的负载均衡方法可以应用于NR***，或未来其他的通信***中。
参见图4，为本申请实施例提供的负载均衡方法的流程示意图，如图所示，该方法可以包括以下步骤：
步骤401、第一无线接入网节点向第二无线接入网节点发送第二消息，所述第二消息用于请求该第二无线接入网节点修改该第二无线接入网节点的第一负载类型的移动性参数。其中，与前述实施例类似，第一负载类型可以包括下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X业务中各个频点的负载、V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。
在实现负载均衡的过程中，基站(小区)可以将移动性参数信息发送给该基站(小区)所服务的终端设备，终端设备根据移动性参数，确定是否需要执行小区切换或者进行小区重选。在步骤401中，第一无线接入网节点向第二无线接入网节点发送的第二消息中，可以包括第二无线接入网节点的第一负载类型的切换触发更改信息。示例性的，该第二消息中包括第一无线接入网节点的小区标识、第二无线接入网节点的小区标识、第一无线接入网节点的移动性参数信息、第二无线接入网节点建议修改的移动性参数信息中的任一种或多种，其中第一无线接入网节点的移动性参数为当前第一无线接入网节点所配置的第一负载类型的移动性参数，第二无线接入网节点建议修改的移动性参数是建议第二无线接入网节点修改的第一负载类型的移动性参数，第一无线接入网节点的移动性参数和第二无线接入网节点建议修改的移动性参数包括切换触发更改信息(例如，handover trigger change)，如与当前值相比的切换触发更改值，即该切换触发更改值是第一负载类型粒度的切换触发更改值。例如，对于网络切片负载过载的情况，请求修改的移动性参数可以是某个测量事件(例如A3或A5)的邻小区特定偏移(cell specific offset，或者，cell individual offset，CIO)；对于SUL/UL过载的情况，请求修改的移动性参数可以是某个测量事件(例如A3)的CIO，当然，也可能请求修改其他参数，本申请对此不作限定。此外，可选的，该述消息中还可以包括原因值，表示触发此次修改移动性参数的原因，如双链接操作、切换操作等原因，第二无线接入网节点根据原因值判断需要修改哪一类移动性参数。
可选的，该消息中可以请求第二无线接入网节点修改的第一负载类型的移动性参数，即，第一无线接入网节点期望的第二无线接入网节点修改后的移动性参数。若第一无线接入网节点的负载较重，为了有效避免第二无线接入网节点的终端设备切换至第一无线接入网节点，第一无线接入网节点可以将其期望的第二无线接入网节点修改后的移动性参数发送给第二无线接入网节点。
可以理解的，上述移动性参数信息是第一负载类型粒度的移动性参数信息，例如针对网络切片(组)、SUL/UL、V2X有不同的移动性参数信息。
可选的，该消息中还可以包括公共的移动性参数信息，即第一无线接入网节点的公共的移动性参数和/或第二无线接入网节点建议修改的公共的移动性参数。其中，公共的移动性参数表示不区分负载类型的移动性参数。
示例性的，该第二消息可以重用LTE中移动性参数修改请求(mobility change request)消息，或者也可以用NR中的Xn AP消息，或者用新定义的Xn AP消息，本发明在此不限定。所述第二消息也可以是其他名称，本发明在此不限定。
步骤402、第一无线接入网节点从第二无线接入网节点接收响应。
第二无线接入网节点根据从第一无线接入网节点接收的请求修改移动性参数的消息，可以对所请求的第一负载类型的移动性参数进行修改，向第一无线接入网节点返回响应，并将修改后的移动性参数发送给第二无线接入网节点的终端设备，以增加第二无线接入网节点的终端设备切换至第一无线接入网节点的难度。
其中，与前述实施例类似，第一负载类型可以包括下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X业务中各个频点的负载、V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。
可选地，若第二无线接入网节点根据第一无线接入网节点发送的请求修改移动性参数的消息，成功修改第二无线接入网节点的移动性参数，则返回的响应消息给第一无线接入网节点，可选的，所述响应消息中包括第一负载类型的指示信息，该第一负载类型的指示信息用于指示成功修改了的第一负载类型的移动性参数。
可选地，若第二无线接入网节点根据第一无线接入网节点发送的请求修改移动性参数的消息，修改失败，则返回失败消息给第一无线接入网节点，可选的，该移动修改失败消息中包括第一负载类型的指示信息，该第一负载类型的指示信息用于指示修改失败了的第一负载类型的移动性参数；可选的，第二无线接入网节点还可以将移动性参数的可修改范围携带在上述失败消息中发送给第一无线接入网节点，以使第一无线接入网节点根据可修改范围，重新发送请求修改移动性参数的消息，或者放弃修改第二无线接入网节点的移动性参数；示例性的，第二无线接入网节点将修改失败了的第一负载类型的移动性参数的可修改范围携带在上述失败消息中发送给第一无线接入网节点；其中，所述移动性参数的可修改范围可以是切换触发更改下限(handover trigger change lower limit)。若第二无线接入网节点部分修改成功、部分修改失败，第二无线接入网节点可以仅指示第一无线接入网节点修改失败了移动性参数的信息，与前述类似；也可以分别指示修改失败了的移动性参数和修改成功的移动性参数。
可选的，该失败消息中还可以包括公共的移动性参数的可修改范围。
可以理解的，上述移动性参数修改范围是第一负载类型粒度的移动性参数的修改范围，例如针对网络切片、SUL/UL、V2X有不同的移动性参数修改范围。
若第二无线接入网节点根据第一无线接入网节点发送的请求修改移动性参数的消息，确定需要修改多个参数，修改时部分参数修改成功，部分参数修改失败，第二无线接入网节点可以将修改失败的参数的指示信息携带在响应中发送给第一无线接入网节点；可选地， 还可以将修改失败的移动性参数的可修改范围发送给第一无线接入网节点，以使第一无线接入网节点根据可修改范围，重新发送请求修改移动性参数的消息，或者放弃修改这部分参数。
示例性的，该响应消息可以重用LTE中移动性修改确认(mobility change acknowledge)或移动性修改失败(mobility change failure)消息，或者使用NR现有的Xn AP消息，或者用新定义的Xn AP消息，本发明在此不限定。所述响应消息也可以是其他名称，本发明在此不限定。
示例性的，上述第一负载类型可以包括以下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的总负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X各个频点下业务的负载、V2X各个频点下空口的负载、V2X业务各个频点下侧行链路业务的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。
例如，第一无线接入网节点向第二无线接入网节点发送请求修改第二无线接入网节点的网络切片(组)负载的移动性参数的消息，该消息中可以包括第一无线接入网节点的网络切片(组)的移动性参数信息，第二无线接入网节点建议修改的网络切片(组)的移动性参数信息，第一无线接入网节点的公共的移动性参数信息，第二无线接入网节点建议修改的公共的移动性参数信息中的一种或多种，其中网络切片(组)的移动性参数信息和/或公共的移动性参数信息的信元格式如表3a、3b所示。
表3a
Figure PCTCN2019106247-appb-000007
表3b
Figure PCTCN2019106247-appb-000008
第二无线接入网节点在接收到上述消息后，如果成功修改则向第一无线接入网节点返回移动性修改响应消息，否则如果修改失败，则返回移动性参数修改失败(mobility change failure)消息，该移动性修改失败消息中包括网络切片(组)的移动性参数修改范围和/或公共的移动性参数修改范围，如表4a、4b所示。
表4a
Figure PCTCN2019106247-appb-000009
Figure PCTCN2019106247-appb-000010
表4b
IE/Group Name信息元素
Handover Trigger Change Limit List切换触发更改限制列表
>Handover Trigger Change Lower Limit切换触发更改最低限制
>Handover Trigger Change Upper Limit切换触发更改最高限制
>S-NSSAI or S-NSSAI list单一网络切片或单一网络切片列表
再例如，第一无线接入网节点向第二无线接入网节点发送请求修改第二无线接入网节点的网络切片(组)负载的移动性参数的消息，该消息中包括第一无线接入网节点的网络切片(组)的移动性参数增量(delta)信息，第二无线接入网节点建议修改的网络切片(组)的移动性参数增量(delta)信息，第一无线接入网节点的公共的移动性参数增量(delta)信息，第二无线接入网节点建议修改的公共的移动性参数增量(delta)信息，第一无线接入网节点的公共的移动性参数信息，第二无线接入网节点建议修改的公共的移动性参数信息中的一种或多种，其中网络切片(组)的移动性参数增量(delta)信息和/或公共的移动性参数信息，如表5a所示。
表5a
Figure PCTCN2019106247-appb-000011
第二无线接入网节点在接收到上述消息后，如果成功修改则向第一无线接入网节点返回移动性修改响应消息，否则如果修改失败，则返回移动性参数修改失败(mobility change failure)消息，该移动性修改失败消息中包括网络切片(组)的移动性参数修改范围和/或公共的移动性参数修改范围，如表5b所示。
表5b
Figure PCTCN2019106247-appb-000012
在上述场景中，第一无线接入网节点向第二无线接入网节点发送的第二消息的原因值可能是网络切片负载的负载均衡相关的原因值，例如增强的移动宽带(Enhanced Mobile Broad Band，eMBB)、超可靠低时延通信(Ultra Reliable Low Latency Communication，URLLC)、物联网(internet of things，IoT)等。
再例如：第一无线接入网节点向第二无线接入网节点发送请求修改第二无线接入网节点的SUL的移动性参数的消息，该消息中可以包括第一无线接入网节点的上行载波的移动性参数信息，第二无线接入网节点的建议修改的上行载波的移动性参数信息，第一无线接入网节点的公共的移动性参数信息，第二无线接入网节点建议修改的公共的移动性参数信息中的一种或多种，其中，其中上行载波的信元格式如表6a所示。
表6a
Figure PCTCN2019106247-appb-000013
第二无线接入网节点在接收到上述消息后，如果成功修改则向第一无线接入网节点返回移动性修改响应消息，否则如果修改失败，则返回移动性参数修改失败(mobility change failure)消息，该移动性修改失败消息中包括SUL/NUL(normal UL)的移动性参数修改范围，如表6b所示。
表6b
Figure PCTCN2019106247-appb-000014
Figure PCTCN2019106247-appb-000015
在这种场景下，第一无线接入网节点向第二无线接入网节点发送的第二消息的原因值可能是UL/SUL粒度的负载均衡相关的原因值。
对于UL/SUL的移动性参数修改也可能包括公共的移动性参数修改信息和增量变量移动性修改信息，与网络切片(组)的信息类似，这里不再赘述。
例如：第一无线接入网节点向第二无线接入网节点发送请求修改V2X业务(组)、V2X业务频点(组)负载的移动性参数的消息，该消息中可以包括第一无线接入网节点的V2X业务(组)的移动性参数信息，第二无线接入网节点的建议修改的V2X(组)的移动性参数信息，第一无线接入网节点的公共的移动性参数信息，第二无线接入网节点建议修改的公共的移动性参数信息中的一种或多种，其中V2X的信元格式如表7a所示。
表7a
IE/Group Name信息元素
Handover Trigger Change List切换触发更改列表
>Handover Trigger Change切换触发更改
>V2X frequency V2X业务的频点
第二无线接入网节点在接收到上述消息后，如果成功修改则向第一无线接入网节点返回移动性修改响应消息，否则如果修改失败，则返回移动性参数修改失败(mobility change failure)消息，该移动性修改失败消息中包括V2X业务(组)和/或V2X业务频点(组)的移动性参数修改范围，如表3b所示。
表7b
Figure PCTCN2019106247-appb-000016
表7a和表7b中的V2X频点(V2X frequency)还可以替换为V2X业务或者V2X Qos，即，表示V2X业务中具有相同QoS需求的负载。
在这种场景下，第一无线接入网节点向第二无线接入网节点发送的第二消息的原因值可能是V2X频点或者V2X业务或者V2X Qos粒度的负载均衡相关的原因值。
对于V2X业务负载的移动性参数修改也可能会包括公共的移动性参数修改信息和增量变量移动性修改信息，类似网络切片(组)粒度的，这里不再赘述。
例如：第一无线接入网节点向第二无线接入网节点发送请求修改UE能力负载的移动性参数的消息，该消息中可以包括第一无线接入网节点的UE能力负载的移动性参数信息，第二无线接入网节点的建议修改的UE能力负载的移动性参数信息，第一无线接入网节点的公共的移动性参数信息，第二无线接入网节点建议修改的公共的移动性参数信息中的一种或多种，其中UE能力负载的信元格式如表8a所示。
表8a
Figure PCTCN2019106247-appb-000017
第二无线接入网节点在接收到上述消息后，如果成功修改则向第一无线接入网节点返回移动性修改响应消息，否则如果修改失败，则返回移动性参数修改失败(mobility change failure)消息，该移动性修改失败消息中包括UE能力负载的移动性参数修改范围，如表8b所示。
表8b
Figure PCTCN2019106247-appb-000018
在这种场景下，第一无线接入网节点向第二无线接入网节点发送的移动性修改消息的原因值可能是UE能力负载的负载均衡相关的原因值，例如UE能力可以是支持哪一种类型的业务等等，本申请对此不作限定。
对于UE能力负载的移动性参数修改也可能会包括公共的移动性参数修改信息和增量变量移动性修改信息，类似网络切片(组)粒度的，这里不再赘述。
在上述实施例中，第一无线接入网节点可以为源基站，第二无线接入网节点可以为目标基站，可选地，源基站和目标基站在多链接的数据传输场景下也可以适用，其中源基站可以作为主基站，目标基站可以作为辅基站。可选的，第一无线接入网节点也可以为CU，第二无线接入网节点为相邻CU；或者第一无线接入网节点可为CU-CP，第二无线接入网节点为相邻CU-UP。
本申请实施例还提供了一种负载均衡方法，用于实现较细粒度的负载均衡，即，可以满足对UL/SUL、网络切片或V2X不同业务下的不同负载需求。本申请实施例提供的负载均衡方法可以应用于NR***，或未来其他的通信***中。
参见图5，为本申请实施例提供的负载均衡方法的流程示意图，如图所示，该方法可以包括以下步骤：
步骤501、第一无线接入网节点将第一负载类型的负载均衡参数发送给终端设备。
其中，与前述实施例类似，第一负载类型可以包括下一种或多种：网络切片的负载、网络切片组的负载、单一网络切片中具有相同QoS需求业务的负载、V2X业务的负载、V2X业务在空口的负载、V2X业务在侧行链路的负载、V2X业务中同一频点的负载、V2X中具有相同QoS需求业务的负载、UL和/或SUL的负载。
第一负载类型的负载均衡参数可以包括小区重选参数和/或专用优先级。即，小区重选参数包括网络切片(组)类型的小区重选参数、UL/SUL类型的小区重选参数和/或V2X类型的小区重选参数；专用优先级包括网络切片(组)类型的专用优先级、UL/SUL类型的专用优先级和/或V2X类型的专用优先级。
其中，小区重选参数可以包括面向特定小区的参数(例如R准则中的目标小区的偏移值Qoffset)，即，第一无线接入网节点修改对特定小区的Qoffset。示例性的，该Qoffset可以是网络切片(组)粒度的，即该特定小区中不同网络切片(组)可以具有不同的Qoffset，可选的，第一无线接入网节点可以将该网络切片的Qoffset发送给终端设备。该Qoffset也可以是UL/SUL粒度的，即该特定小区中的SUL和UL可以具有不同的Qoffset。该Qoffset还可以是V2X业务的频点粒度的，即该特定小区中V2X业务下的不同频点可以具体不同的Qoffset。
可以理解的，终端设备根据该小区重选参数在候选重选小区中进行排序选择最优小区，示例性的，终端设备根据网络切片(组)粒度的小区重选参数选择合适的小区的网络切片(组)进行数据传输，或者，终端设备根据上行载波粒度的小区重选参数选择合适的小区的上行载波进行数据传输，或者，终端设备根据V2X频率粒度的小区重选参数选择合适的小区的V2X频率进行数据传输。
可选的，第一无线接入网节点可以将该第一无线接入网节点所支持的网络切片信息和/或V2X频点信息发送给终端设备。
示例性的，以网络切片的Qoffset为例，第一无线接入网节点确定邻小区1的网络切片1的Qoffset1、网络切片2的Qoffset2、网络切片3的Qoffset3…，第一无线接入网节点确定邻小区2的网络切片1的Qoffset1’、网络切片2的Qoffset2’、网络切片3的Qoffset3’…，第一无线接入网节点发送所述小区的标识(例如PCI、CGI等)、网络切片的标识(例如S-NSSAI)、相应的Qoffset给终端设备，终端设备根据接收到的多个邻小区的Qoffset，选择合适的小区以及该小区中的网络切片进行数据传输。
当第一负载类型为网络切片(组)负载类型，该专用优先级为不同网络切片(组)的优先级，终端设备可以根据不同网络切片(组)的优先级选择合适的网络切片(组)进行业务的传输。当第一负载类型为V2X业务的负载时，该专用优先级可以为V2X业务中不同频点的优先级，终端设备可以根据不同V2X频点的优先级选择合适的频点进行V2X业务的传输。当第一负载类型为UL/SUL的负载时，该专用优先级可以为UL和SUL的优先级，终端设备根据UL和SUL的优先级选择合适的UL还是SUL进行上行数据的传输。
示例性的，以网络切片的专用优先级为例，第一无线接入网节点根据各个小区下所支持的网络切片的负载确定各个网络切片的优先级，第一无线接入网节点可以将每个网络切片的标识(例如单一网络切片选择负载信息(single network slice selection assistance information，S-NSSAI)，以及该网络切片的优先级给终端设备。
在一些实施例中，第一无线接入网节点在执行上述步骤501之前，可以先对第一无线接入网节点的小区进行空闲态和/或去激活态的终端设备负载信息进行测量，可选的，该负载信息的测量可以是通过统计第一负载类型下的空闲态终端设备和/或去激活态终端设备的数量，从而确定出上述第一负载类型的负载均衡参数。
在一种可能的实现方式中，第一无线接入网节点在执行上述步骤501之前，还可以先获取相邻基站、CU、CU-CP等无线接入网节点的第一负载类型的负载信息，获取负载信息的过程与前述实施例类似，此处不再赘述。然后，第一无线接入网节点根据获取到的其他无线接入网节点的第一负载类型的负载信息，确定该第一无线接入网节点的第一负载类型的负载均衡参数。
可选的，第一无线接入网节点可以通过广播消息将第一负载类型的负载均衡参数发送给终端设备，或者也可以通过其他新定义的消息来发送，本发明在此不限定。
步骤502、终端设备根据上述负载均衡参数进行小区重选。
通过上述方法实现对空闲态终端设备和去激活态终端设备进行负载均衡时，考虑到了网络切片负载、V2X负载、UL/SUL负载各自的负载，与现有的负载均衡方法相比，考虑的负载信息是粒度较细的负载信息，能够针对某个网络切片(组)的负载情况或者针对V2X业务的负载或者针对UL/SUL的负载情况进行负载均衡，能够适用于与NR***或未来其他***中的负载均衡需求，有助于提高负载均衡的成功率以及***效率。
示例性的，本申请实施例提供的上述三种负载均衡方法也可以相互结合。例如，第一无线接入网节点可以获取第二无线接入网节点的第一负载类型的负载信息；然后第一无线接入网节点可以根据第二无线接入网节点的负载信息修改第一无线接入网节点的负载均衡参数(小区重选参数和/或专用优先级)，以使第一无线接入网节点的空闲态、去激活态终端设备根据修改后的负载均衡参数进行小区重选。又例如，第一无线接入网节点可以获取第二无线接入网节点的第一负载类型的负载信息；然后第一无线接入网节点可以根据第二无线接入网节点的负载信息修改第一无线接入网节点的负载均衡参数(小区重选参数和/或专用优先级)，以使第一无线接入网节点的空闲态、去激活态终端设备根据修改后的负载均衡参数进行小区重选；此外，第一无线接入网节点还可以请求修改第二无线接入网节点的移动性参数，以减少从第二无线接入网节点切换至第一无线接入网节点的终端设备，其中，第一无线接入网节点修改自身负载均衡参数和请求修改第二无线接入网节点的移动性参数的顺序可以互换。又例如，第一无线接入网节点可以获取第二无线接入网节点的第一负载类型的负载信息；然后，第一可以请求修改第二无线接入网节点的移动性参数，以减少从第二无线接入网节点切换至第一无线接入网节点的终端设备。再例如，第一无线接入网节点接收到第二无线接入网节点发送的请求修改第一无线接入网节点的第一负载类型的移动性参数的请求，第一无线接入网节点根据该请求修改第一无线接入网节点的第一负载类型的负载均衡参数，以减少第一无线接入网节点的空闲态、去激活态终端设备重选到第二无线接入网节点上。
基于相同的技术构思，本申请实施例还提供了一种负载均衡装置，用于实现上述方法 实施例中第一无线接入网节点的功能。如图6所示，该装置可以包括收发单元610和处理单元620。
其中，收发单元，用于接收来自于第二无线接入网节点的第一消息，所述第一消息中包含所述第二无线网节点的第一负载类型的负载信息，所述第一负载类型包括以下任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；
处理单元，用于获取所述第一负载类型的负载信息。
在一种可能的实现方式中，所述收发单元还用于：向所述第二无线接入网节点发送第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。
在一种可能的实现方式中，所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者，所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
在一种可能的实现方式中，所述网络切片负载的负载信息包括：单一网络切片的标识和所述单一网络切片的负载情况，和/或，网络切片组的标识和所述网络切片组的负载情况；和/或，所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；和/或，所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
在一种可能的实现方式中，所述负载情况包括对以下中任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
在一种可能的实现方式中，所述测量结果包括测量值和/或过载指示信息。
在一种可能的实现方式中，所述收发单元还用于：向所述第二无线接入网节点发送请求，所述请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。
在一种可能的实现方式中，所述装置为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，所述装置为DU，所述第二无线接入网节点为CU。
所述CU具有以下中任一种或多种协议层功能：分组数据汇聚协议、无线资源控制、业务数据适配协议；所述DU具有以下中任一种或多种协议层功能：无线链路层控制协议、媒体访问控制层、物理层；所述CU和DU属于同一个无线基站。
在一种可能的实现方式中，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者，所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
在一种可能的实现方式中，所述第一无线接入网节点为控制面集中单元无线接入网节点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；所述CU-CP和CU-UP属于同一个无线基站。
在一种可能的实现方式中，所述CU-UP的第一负载类型的负载信息包括所述第一负 载类型的硬件负载和/或所述第一负载类型的传输负载；或者，所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
基于相同的技术构思，本申请实施例还提供了一种负载均衡装置，用于实现上述方法实施例中第二无线接入网节点的功能，如图7所述，该装置可以包括收发单元710和处理单元720。
其中，收发单元710在所述处理单元720的控制下，用于向第一无线接入网节点发送第一消息，所述第一消息中包含第一负载类型的负载信息，所述第一负载类型包括以下一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载。
在一种可能的实现方式中，收发单元还用于：接收来自于所述第一无线接入网节点的第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。
在一种可能的实现方式中，所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者，所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
在一种可能的实现方式中，所述网络切片负载的负载信息包括单一网络切片的标识和所述单一网络切片的负载情况、和/或网络切片组的表述和所述网络切片组的负载情况；和/或，所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；和/或，所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
在一种可能的实现方式中，所述负载情况包括对以下任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
在一种可能的实现方式中，所述测量结果包括测量值和/或过载指示信息。
在一种可能的实现方式中，收发单元还用于：接收来自所述第一无线接入网节点的请求，所述请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。
在一种可能的实现方式中，所述第一无线接入网节点为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，所述第一无线接入网节点为DU，所述第二无线接入网节点为C。
所述CU具有以下一种或多种协议层：分组数据汇聚协议、无线资源控制、业务数据适配协议；所述DU具有以下一种或多种协议层：无线链路层控制协议、媒体访问控制层、物理层；所述CU和所述DU属于同一个无线基站。
在一种可能的实现方式中，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者，所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
在一种可能的实现方式中，所述第一无线接入网节点为控制面集中单元无线接入网节 点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；所述CU-CP和所述CU-UP属于同一个无线基站。
在一种可能的实现方式中，所述CU-UP的第一负载类型的负载信息包括所述第一负载类型的硬件负载和/或所述第一负载类型的传输负载；或者，所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
本申请实施例还提供了一种通信***，可以包括上述如图6所述的负载均衡装置和如图7所示的负载均衡装置。
基于相同的技术构思，本申请实施例还提供了一种负载均衡装置，用于实现上述方法实施例中第一无线接入网节点的功能。如图8所示，该装置可以包括收发单元810和处理单元820。
其中，收发单元，用于接收来自第一无线接入网节点发送的第二消息，所述第二消息包括：用于请求所述第二无线接入网节点修改所述第二无线接入网节点的第一负载类型的移动性参数，所述第一负载类型包括以下中任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载。
处理单元，用于根据所述第二消息，对所述第二无线接入网节点的移动性参数进行修改。
收发单元还用于：向所述第一无线接入网节点发送响应。
在一种可能的实现方式中，所述移动性参数信息包括切换触发更改信息。
在一种可能的实现方式中，所述消息中包括：请求所述第二无线接入网节点修改的第一负载类型的移动性参数信息。
在一种可能的实现方式中，所述响应中包括用于指示所述第二无线接入网节点成功修改移动性参数的指示信息；或者，所述响应中包括所述第二无线接入网节点的第一负载类型的移动性参数修改范围。
在一种可能的实现方式中，所述网络切片负载包括单一网络切片的负载和/或网络切片组的负载；和/或，所述V2X负载包括以下一种或多种：V2X业务在空口的负载，V2X业务在侧行链路的负载，V2X业务中各个频率的负载，V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同服务质量QoS的业务的负载。
基于相同的技术构思，本申请实施例还提供了负载均衡装置，用于实现上述方法实施例中第一无线接入网节点的功能，该装置可以为上述方法实施例中的第一无线接入网节点，也可以为设置在第一无线接入网节点中的芯片。
当该装置为第一无线接入网节点时，如图9所示，该装置可以包括处理器910、存储器920、通信接口930，可选的，还可以包括总线940。处理器910可用于执行存储器920中的指令，通过所述通信接口930实现上述方法实施例中第一无线接入网节点的功能。
示例性地，处理器910可以是一个通用CPU，微处理器，ASIC，或一个或多个用于控制本申请方案程序执行的集成电路。
通信总线940可包括一通路，在上述组件之间传送信息。
通信接口930，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以 太网，无线接入网，无线局域网等。
存储器920可以是只读存储器或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器、只读光盘或其他光盘存储、光碟存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器920可以是独立存在，通过总线与处理器910相连接。存储器920也可以和处理器910集成在一起。
其中，存储器920用于存储执行本申请方案的应用程序代码，并由处理器910来控制执行。处理器910用于执行存储器920中存储的应用程序代码，从而实现本申请上述实施例提供的负载均衡方法。
或者，可选的，本申请实施例中，也可以是处理器910执行本申请上述实施例提供的负载均衡方法中的相关功能，通信接口930负责与其他设备或通信网络通信，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器910可以包括一个或多个CPU。
在具体实现中，作为一种实施例，该网络设备可以包括多个处理器。这些处理器中的每一个可以是一个单核处理器，也可以是一个多核处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
当该装置为配置于第一无线接入网节点中的芯片时，该通信接口可以是输入/输出接口。
基于相同的技术头上，本申请实施例还提供了负载均衡装置，用于实现上述方法实施例中第二无线接入网节点的功能，该装置可以为上述方法实施例中的第二无线接入网节点，也可以为设置在第二无线接入网节点中的芯片。如图10所示，该装置可以包括处理器1010、存储器1020、通信接口1030，可选的，还可以包括总线1040。处理器1010可用于执行存储器1020中的指令，通过所述通信接口1030实现上述方法实施例中第二无线接入网节点的功能。
当该装置为第一无线接入网节点时，如图10所示，该装置可以包括处理器1010、存储器1020、通信接口1030，可选的，还可以包括总线1040。处理器1010可用于执行存储器1020中的指令，通过所述通信接口1030实现上述方法实施例中第一无线接入网节点的功能。
示例性地，处理器1010可以是一个通用CPU，微处理器，ASIC，或一个或多个用于控制本申请方案程序执行的集成电路。
通信总线1040可包括一通路，在上述组件之间传送信息。
通信接口1030，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网，无线局域网等。
存储器1020可以是只读存储器或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器、只读光盘或其他光盘存储、光碟存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器1020可以是独立存在，通过总线与处理器1010相连接。存储器1020也可以和处理器1010集成在一起。
其中，存储器1020用于存储执行本申请方案的应用程序代码，并由处理器1010来控 制执行。处理器1010用于执行存储器1020中存储的应用程序代码，从而实现本申请上述实施例提供的负载均衡方法。
或者，可选的，本申请实施例中，也可以是处理器1010执行本申请上述实施例提供的负载均衡方法中的相关功能，通信接口1030负责与其他设备或通信网络通信，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器1010可以包括一个或多个CPU。
在具体实现中，作为一种实施例，该网络设备可以包括多个处理器。这些处理器中的每一个可以是一个单核处理器，也可以是一个多核处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
当该装置为配置于第一无线接入网节点中的芯片时，该通信接口可以是输入/输出接口。
本申请实施例提供了一种通信***，包括如图9所示的装置和如图10所示的装置。
本申请实施例提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行上述方法实施例中第一无线接入网节点的功能或第二无线接入网节点的功能。
本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述方法实施例中第一无线接入网节点的功能或第二无线接入网节点的功能。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (32)

  1. 一种负载均衡方法，其特征在于，包括：
    第一无线接入网节点接收来自于第二无线接入网节点的第一消息，所述第一消息中包含所述第二无线网节点的第一负载类型的负载信息，所述第一负载类型包括以下任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；
    所述第一无线接入网节点获取所述第一负载类型的负载信息。
  2. 如权利要求1所述的方法，其特征在于，还包括：
    所述第一无线接入网节点向所述第二无线接入网节点发送第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。
  3. 如权利要求2所述的方法，其特征在于，
    所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者
    所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
  4. 如权利要求1-3中任一项所述的方法，其特征在于，
    所述网络切片负载的负载信息包括：单一网络切片的标识和所述单一网络切片的负载情况，和/或，网络切片组的标识和所述网络切片组的负载情况；
    和/或，
    所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；
    和/或，
    所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述负载情况包括对以下中任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
  6. 如权利要求5所述的方法，其特征在于，所述测量结果包括测量值和/或过载指示信息。
  7. 如权利要求1-6中任一项所述的方法，其特征在于，还包括：
    所述第一无线接入网节点向所述第二无线接入网节点发送请求，所述请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。
  8. 如权利要求1-4、7中任一项所述的方法，其特征在于，所述第一无线接入网节点为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，
    所述第一无线接入网节点为DU，所述第二无线接入网节点为CU；
    所述CU具有以下中任一种或多种协议层功能：分组数据汇聚协议、无线资源控制、业务数据适配协议；
    所述DU具有以下中任一种或多种协议层功能：无线链路层控制协议、媒体访问控制 层、物理层；
    所述CU和DU属于同一个无线基站。
  9. 如权利要求8所述的方法，其特征在于，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者
    所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
  10. 如权利要求1-4、7中任一项所述的方法，其特征在于，所述第一无线接入网节点为控制面集中单元无线接入网节点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，
    所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；
    所述CU-CP和CU-UP属于同一个无线基站。
  11. 如权利要求10所述的方法，其特征在于，所述CU-UP的第一负载类型的负载信息包括所述第一负载类型的硬件负载和/或所述第一负载类型的传输负载；或者
    所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
  12. 一种负载均衡方法，其特征在于，包括：
    第一无线接入网节点接收来自第一无线接入网节点发送的第二消息，所述第二消息包括：用于请求所述第二无线接入网节点修改所述第二无线接入网节点的第一负载类型的移动性参数，所述第一负载类型包括以下中任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；
    所述第二无线接入网节点根据所述第二消息，对所述第二无线接入网节点的移动性参数进行修改，并向所述第一无线接入网节点发送响应。
  13. 如权利要求12所述的方法，其特征在于，所述移动性参数信息包括切换触发更改信息。
  14. 如权利要求12所述的方法，其特征在于，所述消息中包括：请求所述第二无线接入网节点修改的第一负载类型的移动性参数信息。
  15. 如权利要求12所述的方法，其特征在于，所述响应中包括用于指示所述第二无线接入网节点成功修改移动性参数的指示信息；或者
    所述响应中包括所述第二无线接入网节点的第一负载类型的移动性参数修改范围。
  16. 如权利要求12-15中任一项所述的方法，其特征在于，所述网络切片负载包括单一网络切片的负载和/或网络切片组的负载；和/或，
    所述V2X负载包括以下一种或多种：V2X业务在空口的负载，V2X业务在侧行链路的负载，V2X业务中各个频率的负载，V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同服务质量QoS的业务的负载。
  17. 一种负载均衡装置，其特征在于，包括：
    收发单元，用于接收来自于第二无线接入网节点的第一消息，所述第一消息中包含所述第二无线网节点的第一负载类型的负载信息，所述第一负载类型包括以下任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；
    处理单元，用于获取所述第一负载类型的负载信息。
  18. 如权利要求17所述的装置，其特征在于，所述收发单元还用于：
    所述第一无线接入网节点向所述第二无线接入网节点发送第一信息，所述第一信息用于获取所述第二无线接入网节点的第一负载类型的负载信息。
  19. 如权利要求18所述的装置，其特征在于，
    所述第一信息中还包括所述第一负载类型的负载信息的发送周期；或者
    所述第一信息中还包括所述第一负载类型的负载信息发送的触发条件。
  20. 如权利要求18-19中任一项所述的装置，其特征在于，
    所述网络切片负载的负载信息包括：单一网络切片的标识和所述单一网络切片的负载情况，和/或，网络切片组的标识和所述网络切片组的负载情况；
    和/或，
    所述V2X负载的负载信息包括V2X的频率信息，所述V2X负载的负载信息还包括以下中任一种或多种：与所述V2X的频率信息对应的V2X在空口的负载情况、与所述V2X的频率信息对应的V2X业务在侧行链路的负载情况、V2X中具有相同服务质量QoS的业务的负载情况；
    和/或，
    所述补充上行链路SUL负载信息包括：所述补充上行链路的频点和所述补充上行链路的负载。
  21. 如权利要求17-20中任一项所述的装置，其特征在于，所述负载情况包括对以下中任一种或多种测量对象的测量结果：接入终端设备的数量、硬件负载、传输负载、参考信号接收功率测量报告、无线资源状态、ABS状态信息、可用资源、信道状态信息报告、接入小区控制信息。
  22. 如权利要求21所述的装置，其特征在于，所述测量结果包括测量值和/或过载指示信息。
  23. 如权利要求17-22中任一项所述的装置，其特征在于，所述收发单元还用于：
    向所述第二无线接入网节点发送请求，所述请求用于请求将所述第一无线接入网节点服务的终端设备切换至所述第二无线接入网节点，所述请求中包括所述第一负载类型的指示信息，所述第一负载类型的指示信息用于指示所述切换的原因。
  24. 如权利要求17-20、23中任一项所述的装置，其特征在于，所述装置为集中式单元CU，所述第二无线接入网节点为分布式单元DU；或者，
    所述装置为DU，所述第二无线接入网节点为CU；
    所述CU具有以下中任一种或多种协议层功能：分组数据汇聚协议、无线资源控制、业务数据适配协议；
    所述DU具有以下中任一种或多种协议层功能：无线链路层控制协议、媒体访问控制层、物理层；
    所述CU和DU属于同一个无线基站。
  25. 如权利要求24所述的装置，其特征在于，所述DU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的无线资源状态、第一负载类型的几乎空白指针ABS状态、第一负载类型的信道状态信息报告、第一负载类型的小区接入控制信息；或者
    所述CU的第一负载类型的负载信息包括以下一种或多种：第一负载类型的硬件负载、 第一负载类型的传输负载、第一负载类型的参考信号接收功率测量报告。
  26. 如权利要求17-20、23中任一项所述的装置，其特征在于，所述第一无线接入网节点为控制面集中单元无线接入网节点CU-CP，所述第二无线接入网节点为用户面集中单元无线接入网节点CU-UP；或者，
    所述第一无线接入网节点为用户面集中单元无线接入网节点CU-UP，所述第二无线接入网节点为控制面集中单元无线接入网节点CU-CP；
    所述CU-CP和CU-UP属于同一个无线基站。
  27. 如权利要求26所述的装置，其特征在于，所述CU-UP的第一负载类型的负载信息包括所述第一负载类型的硬件负载和/或所述第一负载类型的传输负载；或者
    所述CU-CP的第一负载类型的负载信息包括以下一种或多种：所述第一负载类型的硬件负载、所述第一负载类型的传输负载、所述第一负载类型的参考信号接收功率测量报告。
  28. 一种负载均衡装置，其特征在于，包括：
    收发单元，用于接收来自第一无线接入网节点发送的第二消息，所述第二消息包括：用于请求所述第二无线接入网节点修改所述第二无线接入网节点的第一负载类型的移动性参数，所述第一负载类型包括以下中任一种或多种：网络切片负载、车联万物V2X负载和补充上行链路SUL负载；
    处理单元，用于根据所述第二消息，对所述第二无线接入网节点的移动性参数进行修改；
    收发单元还用于：向所述第一无线接入网节点发送响应。
  29. 如权利要求28所述的装置，其特征在于，所述移动性参数信息包括切换触发更改信息。
  30. 如权利要求28所述的装置，其特征在于，所述消息中包括：请求所述第二无线接入网节点修改的第一负载类型的移动性参数信息。
  31. 如权利要求28所述的装置，其特征在于，所述响应中包括用于指示所述第二无线接入网节点成功修改移动性参数的指示信息；或者
    所述响应中包括所述第二无线接入网节点的第一负载类型的移动性参数修改范围。
  32. 如权利要求28-31中任一项所述的装置，其特征在于，所述网络切片负载包括单一网络切片的负载和/或网络切片组的负载；和/或，
    所述V2X负载包括以下一种或多种：V2X业务在空口的负载，V2X业务在侧行链路的负载，V2X业务中各个频率的负载，V2X各个频点下空口业务的负载、V2X各个频点下侧行链路业务的负载、V2X中具有相同服务质量QoS的业务的负载。
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