WO2021017924A1 - Cho资源处理方法、装置和系统 - Google Patents

Cho资源处理方法、装置和系统 Download PDF

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Publication number
WO2021017924A1
WO2021017924A1 PCT/CN2020/103060 CN2020103060W WO2021017924A1 WO 2021017924 A1 WO2021017924 A1 WO 2021017924A1 CN 2020103060 W CN2020103060 W CN 2020103060W WO 2021017924 A1 WO2021017924 A1 WO 2021017924A1
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Prior art keywords
cho
base station
resource
indication information
target cell
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PCT/CN2020/103060
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English (en)
French (fr)
Inventor
杨立
马子江
高音
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US17/631,144 priority Critical patent/US20220264390A1/en
Priority to EP20847310.8A priority patent/EP4007362A4/en
Priority to MX2022001259A priority patent/MX2022001259A/es
Publication of WO2021017924A1 publication Critical patent/WO2021017924A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • This application relates to a wireless communication network, such as a CHO resource processing method, device and system.
  • the 5G core network (5G Core, 5GC) and the next generation radio access network (Next Generation Radio Access Network, NG-RAN) two major subsystems are included.
  • the NG-RAN includes at least two types of base stations with different radio access technologies (Radio Access Technology, RAT).
  • the NG-RAN base station maintains the continuity of the user equipment (User Equipment, UE) communication service through the handover (Handover) process, that is, the UE’s communication packets are transferred from the source serving node/cell (Source Node/Cell) to the enemy as smoothly as possible To the target serving node/cell (Target Node/Cell).
  • the handover process usually includes three stages: "handover preparation”, “handover execution”, and "handover completion". In the traditional unconditional handover process, the two phases of "handover preparation” and "handover execution" are continuous in time.
  • the unconditional handover mechanism is designed for low-frequency non-dense cell deployment.
  • heterogeneous networks have been deployed on top of homogeneous networks.
  • the densely deployed numerous cells result in numerous handovers. select. Therefore, the Conditional Handover (CHO) mechanism was introduced in the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP).
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • the source cell reports the measurement report (Measuerment Report) and the local radio resource management (Radio Resources Management, RRM) strategy based on the wireless measurement results of the UE, starts the "CHO handover preparation” process, and requests multiple potential/candidate target cells to complete the "CHO handover”
  • the target-side resource reservation configuration related to the "preparation” process, and the CHO pre-configuration information is sent to the UE through air interface radio resource control (Radio Resources Control, RRC) signaling.
  • RRC Radio Resources Control
  • each potential/candidate target cell needs to be reserved for communication resources. Only after the UE performs the actual CHO handover in the "CHO handover execution" process, The resources reserved by the target cell that is not handed over will be released, which will occupy a large amount of system resources.
  • This application provides a CHO resource processing method, device and system, which can improve the resource utilization rate of the system, reduce the processing burden of the UE, and improve the user experience.
  • the embodiment of the application provides a CHO resource processing method, including:
  • the source base station of the UE sends CHO resource change request indication information to at least one CHO target base station of the UE, where the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE;
  • the source base station sends a CHO resource change notification to the UE, and the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed and the identity of at least one CHO target cell.
  • the embodiment of the application provides a CHO resource processing method, including:
  • the CHO target base station of the UE receives the CHO resource change request indication information sent by the source base station of the UE, where the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE;
  • the CHO target base station changes the resources of at least one CHO target cell indicated by the CHO resource change request indication information.
  • the embodiment of the application provides a CHO resource processing method, including:
  • the source base station of the UE receives the CHO resource change notification indication information sent by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE;
  • the source base station sends a CHO resource change notification to the UE, and the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed and the identity of at least one CHO target cell.
  • the embodiment of the application provides a CHO resource processing method, including:
  • the CHO target base station of the UE determines to change the resources of at least one CHO target cell configured for the UE;
  • the CHO target base station actively triggers the sending of CHO resource change notification indication information to the source base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resources of at least one CHO target cell of the UE.
  • An embodiment of the present application provides a CHO resource processing device, including:
  • the first sending module is configured to send CHO resource change request indication information to at least one CHO target base station of the UE, where the CHO resource change request indication information is used to instruct at least one CHO target base station to change resources of at least one CHO target cell of the UE;
  • the second sending module is configured to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that at least one CHO target cell's resources are changed and at least one CHO target cell identifier.
  • An embodiment of the present application provides a CHO resource processing device, including:
  • the first receiving module is configured to receive CHO resource change request indication information sent by the source base station of the UE, where the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE;
  • the resource change module is set to change the resource of at least one CHO target cell indicated by the CHO resource change request indication information.
  • An embodiment of the present application provides a CHO resource processing device, including:
  • the second receiving module is configured to receive the CHO resource change notification indication information sent by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE;
  • the third sending module is configured to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that at least one CHO target cell's resources have been changed and at least one CHO target cell identifier.
  • An embodiment of the present application provides a CHO resource processing device, including:
  • the resource determining module is configured to determine the resource of at least one CHO target cell configured for the UE;
  • the fourth sending module is configured to actively trigger the sending of CHO resource change notification indication information to the source base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE.
  • the embodiment of the present application provides a CHO resource processing system, and the CHO resource processing includes a source base station and at least one target base station;
  • the source base station includes the CHO resource processing device described in the embodiment shown in FIG. 9;
  • At least one target base station includes the CHO resource processing device described in the embodiment shown in FIG. 10.
  • the embodiment of the present application provides a CHO resource processing system, and the CHO resource processing includes a source base station and at least one target base station;
  • the source base station includes the CHO resource processing device described in the embodiment shown in FIG. 11;
  • At least one target base station includes the CHO resource processing device described in the embodiment shown in FIG. 12.
  • Figure 1 is a network architecture diagram under the condition that the centralized processing unit/distributed processing unit air interface protocol stack of the aggregated NG-RAN base station is not separated;
  • Figure 2 is a network architecture diagram in the case where the CU/DU air interface protocol stack of the separated NG-RAN base station is separated;
  • FIG. 3 is a schematic diagram of a condition switching scenario provided by an embodiment
  • FIG. 4 is a schematic diagram of a condition switching scene provided by another embodiment
  • FIG. 5 is a flowchart of a CHO resource processing method provided by an embodiment
  • FIG. 6 is a flowchart of another CHO resource processing method provided by an embodiment
  • FIG. 7 is a flowchart of another CHO resource processing method provided by an embodiment
  • FIG. 8 is a flowchart of another CHO resource processing method provided by an embodiment
  • FIG. 9 is a schematic structural diagram of a CHO resource processing device provided by an embodiment.
  • FIG. 10 is a schematic structural diagram of another CHO resource processing device provided by an embodiment
  • FIG. 11 is a schematic structural diagram of another CHO resource processing device provided by an embodiment
  • FIG. 12 is a schematic structural diagram of another CHO resource processing device provided by an embodiment
  • FIG. 13 is a schematic structural diagram of a CHO resource processing system provided by an embodiment
  • FIG. 14 is a schematic structural diagram of a source base station provided by an embodiment
  • FIG. 15 is a schematic structural diagram of a CHO target base station provided by an embodiment.
  • the 5G communication system includes two major subsystems, 5GC and NG-RAN.
  • the 5GC includes network entities or nodes such as Access Mobility Function (AMF), Session Management Function (SMF), and User Plane Function (UPF).
  • AMF Access Mobility Function
  • SMF Session Management Function
  • UPF User Plane Function
  • the NG-RAN includes at least two different RAT types of base stations, namely: next generation eNB (ng-eNB) based on 4G evolved NodeB (eNB), which continues to evolve smoothly, and ng-eNB
  • ng-eNB next generation eNB
  • eNB 4G evolved NodeB
  • ng-eNB next generation eNB
  • eNB 4G evolved NodeB
  • ng-eNB next generation eNB
  • eNB 4G evolved NodeB
  • ng-eNB next generation eNB
  • eNB 4G evolved NodeB
  • ng-eNB next generation eNB
  • E-UTRA evolved terrestrial radio access
  • gNB new physical layer air interface design
  • gNB supports the New Radio (NR) RAT standard, and related Logical interface between network element node entities.
  • NR New Radio
  • the NG-RAN base station (gNB or ng-eNB) is connected to the 5GC bidirectionally (including NG-C control plane connection for signaling transmission and NG-U user plane connection for user data transmission) through a standardized NG interface.
  • the NG-RAN base stations (gNB or ng-eNB) are bidirectionally connected to each other through the Xn interface (including Xn-C control plane connection and Xn-U user plane connection).
  • Figure 1 is a network architecture diagram of an aggregated NG-RAN base station (Aggregated NG-RAN) centralized processing unit/distributed processing unit (Centralized Unit/Distributed Unit, CU/DU) air interface protocol stack without separation.
  • FIG. 2 is a diagram of the network architecture in the case where the CU/DU air interface protocol stack is separated in a separate NG-RAN base station (Disaggregated NG-RAN).
  • NG-RAN NG-RAN base station
  • a single gNB is separated into a single gNB-CU and multiple gNB-DU network node entities, which are bidirectionally connected through a standardized F1 interface, including F1-C control
  • the plane connection is connected with the F1-U user plane.
  • the logical interfaces presented to the outside of the gNB after CU/DU separation and the non-separated gNB/ng-eNB are still NG and Xn interfaces.
  • the control plane connections of the aforementioned network-side logical interfaces are used to transmit control signaling messages between network entities or nodes, and the user plane connections are used to transmit user service data (packets).
  • NG Application Protocol NG Application Protocol, NGAP
  • Xn Application Protocol Xn Application Protocol, XnAP
  • F1 Application Protocol F1 Application Protocol, F1AP
  • NG-C NG-C
  • Xn-C Xn-C
  • F1-C control plane logic network application layer Radio Network Layer, RNL
  • the NG-RAN base station maintains the continuity of the communication service (session) of the end user through the handover process, that is, the communication context of the terminal UE is migrated from the source serving base station cell (Source Node/Cell) to the target serving base station cell as smoothly as possible ( Target Node/Cell).
  • the handover process usually includes three stages: "handover preparation”, “handover execution”, and "handover complete”.
  • the source serving base station cell (hereinafter referred to as the source base station or source cell) and the target serving base station cell (hereinafter referred to as the target base station or target cell) negotiate based on the signaling process of the network logical interface to determine the target Side communication resource reservation configuration and air interface handover command configuration content; in the "handover execution” phase, the source serving base station cell includes the air interface handover command in the RRC air interface signaling and sends it to the UE, and the UE sends the The target base station cell tries to perform a handover operation; in the "handover complete” phase, the source serving base station cell and the target serving base station cell negotiate the signaling process again to notify the handover result and release the communication resources and UE communication that the source side no longer needs to use Context.
  • the source cell reports a measurement report (Measurement Report) and a local radio resource management (RRM) strategy based on the wireless measurement results of the terminal UE, and starts the "handover preparation” process.
  • RRM radio resource management
  • the "actual handover time" of the terminal UE and the received air interface handover command are closely continuous in time.
  • the air interface handover command sent by the source cell is usually sent to the UE when the terminal UE and the network side meet the "actual handover conditions" at the same time.
  • the "actual handover condition” here means that the wireless signal quality of the designated target base station cell is good enough and the communication resources are reserved enough and the configuration is reasonable. After the UE successfully switches to the target base station cell, at least part of the service continuity can be maintained.
  • HetNet heterogeneous network
  • 5G 5th Generation
  • High-frequency resources up to 100GHz will also be used.
  • These high-frequency cells can usually only be deployed in the form of dense small cells.
  • Small Cell Clusters There are many choices when performing handover, and the traditional unconditional handover mechanism is no longer applicable. Therefore, 3GPP introduced a conditional switching mechanism (CHO).
  • the two phases of "CHO switching preparation” and “CHO switching execution” are greatly separated in time, that is, a larger time interval between them is allowed.
  • the source cell reports the Measurement Report and local RRM policy based on the UE's wireless measurement results, starts the "CHO handover preparation” process, and requests multiple potential/candidate target Node/Cells to complete the "CHO handover preparation” process.
  • the target side resource reservation configuration of the, and the CHO pre-configuration information is sent to the UE in advance through the air interface RRC signaling.
  • the source cell does not immediately start the "CHO handover execution"
  • the terminal UE does not immediately perform the CHO handover operation to a suitable target base station cell, but waits until a later time when a certain UE locally evaluates the "actual handover condition" is met ,
  • the terminal UE performs the CHO handover operation to a suitable target base station cell. Therefore, the "actual handover time" of the terminal UE and the received air interface CHO handover command are not continuous in time.
  • the source cell can reserve multiple target side (cell) resources in advance when the source side radio link is still in good condition (for example: non-cell edge), and the terminal UE can select the most appropriate one according to the local dynamic situation.
  • the target cell performs handover, which can reduce the probability of handover failure and improve user service experience.
  • Fig. 3 is a schematic diagram of a conditional handover scenario provided by an embodiment.
  • a source base station administers Cell1/2/3/4/5/6/7 local cells, and Cell1 is the current terminal UE1
  • Cell1 is the current terminal UE1
  • the base station can pre-configure all Cell2/3/4/5/6/7 cells as potential/candidate target base station cells of the UE through the CHO mechanism.
  • the subsequent UE1 When the subsequent UE1 is on the move, it locally evaluates the time when the "actual handover condition" is met , UE1 performs a CHO handover operation to the target cell that meets the CHO condition.
  • the source base station needs to conduct CHO pre-configuration negotiation and "CHO handover preparation" with neighboring base stations based on the interface signaling process.
  • Fig. 4 is a schematic diagram of a conditional handover scenario provided by another embodiment.
  • a source base station administers Cell1/2/7 local cells, and neighbor node 1 (Neighbor node 1) and neighbor base station 2 ( Neighbor node2) There are Cell3/4 local cells and Cell5/6 local cells respectively.
  • Cell1 is the current primary serving cell of a terminal UE2. With the undirected movement of UE2, Cell2/3/4/5/6/7 also All may become potential/candidate target cells of the UE2. Therefore, in order to enhance mobile robustness, the source base station can negotiate with neighboring base stations through the CHO mechanism to pre-configure Cell3/4/5/6 cells as potential/candidate cells for the UE Target base station cell.
  • FIG. 5 is a flowchart of a CHO resource processing method provided by an embodiment. As shown in FIG. 5, the method provided in this embodiment includes the following steps.
  • Step S5010 The source base station of the UE sends CHO resource change request indication information to at least one CHO target base station of the UE.
  • the CHO resource change request indication information is used to instruct the at least one CHO target base station to change the resource of at least one CHO target cell of the UE.
  • the CHO resource processing method provided in this embodiment is applied to a source base station that provides services for UEs in a mobile communication system.
  • the source base station refers to the base station that is serving the UE.
  • the UE accesses the mobile communication network through the source base station.
  • the source base station provides one or more cells.
  • the UE accesses the mobile communication network through a serving cell provided by the source base station at a time.
  • the serving cell the UE accesses is called the primary serving cell.
  • the primary serving cell When the UE is in a mobile state, it may leave the coverage of the primary serving cell and reach other serving cells. In order to ensure the continuity of UE communication services, a handover procedure needs to be performed.
  • conditional switching CHO
  • the CHO resource processing method provided in this embodiment is aimed at the CHO scenario shown in FIG. 4, that is, when the potential CHO scenario of the UE is performed among serving cells under the jurisdiction of multiple base stations.
  • the trajectory of the UE is continuous. Therefore, the UE must switch from the current primary serving cell to the adjacent serving cell when performing CHO.
  • the cells adjacent to the primary serving cell are all potential/candidate target cells of the UE, and the base station providing the target cell becomes the CHO target base station.
  • the target base station corresponding to each target cell needs to pre-configure transmission resources for the UE.
  • the UE's movement trajectory can be predicted in some cases, for example, a UE in a uniform moving state has a high probability of continuing to move in the original moving direction, and a very small probability of moving in the opposite direction of the current moving direction. Therefore, the probability of the UE switching to each CHO target cell is different, and the probability that the transmission resources pre-configured for the CHO target cell with a very low handover probability are used is also extremely low, so you can consider releasing this part of the transmission resources in advance. Or the load in some CHO target cells of the UE is already heavy.
  • the UE If the UE switches to the heavily loaded CHO target cell, it will affect the communication services of other UEs already connected to the cell, or it will not be able to provide satisfaction for the UE to be handed over For required communication services, at this time, the UE can also be prevented from switching to the CHO target cell with a heavy load, and the transmission resources pre-configured for the UE by this type of cell can be released in advance. Or in other cases, when the UE's CHO target cell is not suitable to become the UE's target cell, the transmission resources pre-configured for the UE by the target cell can be released or cancelled in advance.
  • the source base station of the UE can obtain various information and parameters of the UE, and obtain related information of other base stations through the transmission channel between the base stations, so the source base station of the UE can learn whether the CHO target cell of the UE is suitable for handover.
  • the source base station of the UE determines that one or more CHO target cells of the UE are not suitable to become the CHO target cell of the UE, the source base station of the UE sends a CHO resource change request indication message, a CHO resource change request, to at least one CHO target base station of the UE
  • the indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE.
  • One or more CHO target cells determined by the source base station of the UE that are not suitable for the UE may be provided by one or more CHO target base stations of the UE respectively, and the UE needs to send to the CHO target base station corresponding to each determined CHO target cell CHO resource change request instruction information.
  • the CHO resource change request indication information can be used to instruct the CHO target base station providing the CHO target cell to release the resources of the CHO target cell, and it can also be used to instruct the CHO target base station providing the CHO target cell to cancel the resources of the CHO target cell, or it can also be used Instruct the CHO target base station that provides the CHO target cell to modify the resources of the CHO target cell.
  • Both releasing and canceling the resources of the CHO target cell mean that the CHO target cell is no longer suitable for becoming the CHO target cell of the UE.
  • only releasing the resources of the CHO target cell is used as an example for illustration.
  • the processing of the resources of the CHO target cell is the same as the processing scenario of releasing the resources of the CHO target cell, and the processing flow is similar.
  • Modifying the resources of the CHO target cell may be to increase or decrease the resources of the CHO target cell, so as to provide more matching resources for the UE.
  • the CHO resource change request indication information may include an identifier for distinguishing the CHO target cell, such as a target cell id list (Target Cell id List), target cell identifier
  • the list includes the cell ID of the target cell that determines the resource need to be changed.
  • the source base station of the UE sends CHO resource change request indication information to at least one CHO target base station of the UE through interface signaling between the base stations.
  • the interface signaling may be an Xn interface conforming to XnAP interface signaling.
  • Step S5020 The source base station sends a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed and the identity of at least one CHO target cell.
  • the CHO target base station After the source base station sends the CHO resource change request indication information to at least one CHO target base station of the UE, the CHO target base station that receives the CHO resource change request indication information will determine to change at least one CHO target cell indicated in the CHO resource change request indication information resource of. The CHO target base station will change the allocated resources of at least one CHO target cell in response to the CHO resource change request indication information.
  • the source base station also needs to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed, so that the UE also learns that the resource of at least one CHO target cell has changed. Then, after the UE moves to the CHO target cell with the resource change, it can select the target cell for handover according to the transmission resources of the CHO target cell with the resource change.
  • the CHO resource change request indication information instructs the first CHO target cell of the first CHO target base station to release the allocated resources
  • the CHO resource change notification sent by the source base station to the UE includes the information that the resources of the first CHO target cell have been released Even if the UE moves within the range of the first CHO target cell, the handover measurement evaluation is not performed on the first CHO target cell. This can release the pre-allocated resources for the first CHO target cell in advance and reduce the UE’s CHO The processing burden when switching.
  • the CHO resource change request indication information indicates that the first CHO target cell of the first CHO target base station is modified to reduce the allocated resources
  • the CHO resource change notification sent by the source base station to the UE includes that the resources of the first CHO target cell have been modified and reduced
  • the UE moves to the range of the first CHO target cell, it performs handover measurement evaluation on the first CHO target cell and other handoverable CHO target cells.
  • the UE Since the resources of the first CHO target cell have been modified and reduced, the UE will There is a high probability that it will not switch to the first CHO target cell, so that the CHO handover process can be optimized, so that the target cell for the CHO handover of the UE can be modified according to the resource usage of each cell, which improves the resource utilization of the system and improves the user’s Use experience.
  • the source base station of the UE first sends CHO resource change request indication information to at least one CHO target base station of the UE.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change at least the UE’s
  • the resource of a CHO target cell and the source base station sends a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that at least one CHO target cell’s resources have been changed, which can make the system resources controllable and avoid CHO handover Pre-allocating resources for all CHO target cells for excessive occupation of system resources can improve the resource utilization rate of the system, reduce the processing burden of the UE, and improve the user experience.
  • the CHO resource change request indication information includes RRM measurement results related to at least one CHO target cell of the UE, and the RRM measurement results related to at least one CHO target cell of the UE are used to make at least one CHO target base station determine whether Change the resource of at least one CHO target cell and the identity of at least one CHO target cell.
  • the RRM measurement result related to at least one CHO target cell of the UE may be measured and reported by the UE to the source base station.
  • the CHO target base station that receives the RRM measurement result can determine the CHO target cell that the UE may handover or determine the UE handover to each CHO based on the RRM measurement result of the at least one CHO target cell The probability of the target cell. For example, if the RRM measurement result of the first CHO target cell is poor, it means that the UE is far away from the first CHO target cell or the network environment is poor. Even if the UE switches to the first CHO target cell, it will not be better.
  • the target base station to which the first CHO target cell belongs determines that the UE's RRM measurement result of the first CHO target cell is poor and is less than the preset threshold, you can choose to release the resources of the first CHO target cell to avoid UE handover To the first CHO target cell.
  • CHO resource change request feedback information includes whether the resource of at least one CHO target cell is changed, the result information after the change, and the identity of at least one CHO target cell. That is, only the CHO target base station that receives the CHO resource change request indication information knows exactly which CHO target cell's resources have been changed and the result of the change.
  • the CHO target base station needs to send the CHO resource change request feedback information to the source base station, so that the source base station knows whether the resources of at least one CHO target cell are changed and the result of the change. Then the source base station sends the CHO resource change notification to the UE.
  • the CHO resource change request indication information sent by the source base station may also need to be enforced, so the CHO target base station does not need to send the CHO resource change request feedback information, that is, if the CHO resource change request indication information is mandatory, the source base station Do not receive the CHO resource change request feedback information sent by at least one CHO target base station.
  • the CHO resource change request indication information that needs to be fed back can be carried and sent using the Class1 process. However, the CHO resource change request indication information that does not need to be fed back can be carried and sent using the Class2 process.
  • the CHO resource change request indication information includes an expected probability factor related to at least one CHO target cell of the UE, and the expected probability factor is used to indicate the degree to which the source base station expects at least one CHO target cell to change resources.
  • the expected probability factor related to at least one CHO target cell of the UE is determined by the source base station according to the location of the UE or at least one type of measurement information fed back by the UE. For example, the source base station can determine the location and moving track of the UE according to various measurement information fed back by the UE, so as to predict the probability of the UE switching to each CHO target cell, and thereby determine the expected probability factor related to each CHO target cell.
  • the source base station can also determine the distance of the UE from each CHO target cell or the network quality after handover to each CHO target cell according to various measurement information fed back by the UE, and determine the expected probability factor related to each CHO target cell based on this.
  • the CHO target base station receives the CHO resource change request indication information, it determines whether to change the resources of each CHO target cell according to the expected probability factor related to each CHO target cell. For example, the lower the expected probability factor, the lower the probability of UE handover. If the expected probability factor is lower than a certain threshold, the resources of the CHO target cell with the expected probability factor lower than a certain threshold can be released. An expected probability factor of 100% indicates the highest expectation, and an expected probability factor of 1% indicates the lowest expectation.
  • FIG. 6 is a flowchart of another CHO resource processing method provided by an embodiment. As shown in FIG. 6, the method provided by this embodiment includes the following steps.
  • Step S6010 The CHO target base station of the UE receives the CHO resource change request indication information sent by the source base station of the UE.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE.
  • the CHO resource processing method provided in this embodiment is applied to the CHO target base station where the UE performs conditional handover in a mobile communication system.
  • the base station currently serving the UE is the source base station.
  • the UE accesses the mobile communication network through the source base station.
  • the source base station provides one or more cells.
  • the UE accesses the mobile communication network through a serving cell provided by the source base station at a time.
  • the serving cell the UE accesses is called the primary serving cell.
  • the primary serving cell When the UE is in a mobile state, it may leave the coverage of the primary serving cell and reach other serving cells. In order to ensure the continuity of UE communication services, a handover procedure needs to be performed.
  • conditional switching CHO
  • the CHO resource processing method provided in this embodiment is aimed at the CHO scenario shown in FIG. 4, that is, when the potential CHO scenario of the UE is performed among serving cells under the jurisdiction of multiple base stations.
  • the moving track of the UE is continuous, so when the UE performs CHO, it must switch from the primary serving cell where it is currently located to the adjacent serving cell.
  • the cells adjacent to the primary serving cell are all potential/candidate target cells of the UE, and the base station providing the target cell becomes the CHO target base station.
  • the target base station corresponding to each target cell needs to pre-configure transmission resources for the UE.
  • the UE's movement trajectory can be predicted in some cases, for example, a UE in a uniform moving state has a high probability of continuing to move in the original moving direction, and a very small probability of moving in the opposite direction of the current moving direction. Therefore, the probability of the UE switching to each CHO target cell is different, and the probability that the transmission resources pre-configured for the CHO target cell with a very low handover probability are used is also extremely low, so you can consider releasing this part of the transmission resources in advance. Or the load in some CHO target cells of the UE is already heavy.
  • the UE If the UE switches to the heavily loaded CHO target cell, it will affect the communication services of other UEs already connected to the cell, or it will not be able to provide satisfaction for the UE to be handed over For required communication services, at this time, the UE can also be prevented from switching to the CHO target cell with a heavy load, and the transmission resources pre-configured for the UE by this type of cell can be released in advance. Or in other cases, when the UE's CHO target cell is not suitable to become the UE's target cell, the transmission resources pre-configured for the UE by the target cell can be released or cancelled in advance.
  • the source base station of the UE can obtain various information and parameters of the UE, and obtain related information of other base stations through the transmission channel between base stations. Therefore, the source base station of the UE can learn whether the CHO target cell of the UE is suitable for handover.
  • the source base station of the UE determines that one or more CHO target cells of the UE are no longer suitable to become the CHO target cells of the UE, the CHO target base station of the UE will receive the CHO resource change request indication information sent by the source base station of the UE, and the CHO resource change The request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE.
  • One or more CHO target cells determined by the source base station of the UE that are not suitable for the UE may be provided by one or more CHO target base stations of the UE respectively, and the UE needs to send to the CHO target base station corresponding to each determined CHO target cell CHO resource change request instruction information.
  • the CHO resource change request indication information can be used to instruct the CHO target base station providing the CHO target cell to release the resources of the CHO target cell, and it can also be used to instruct the CHO target base station providing the CHO target cell to cancel the resources of the CHO target cell, or it can also be used Instruct the CHO target base station that provides the CHO target cell to modify the resources of the CHO target cell.
  • Both releasing and canceling the resources of the CHO target cell mean that the CHO target cell is no longer suitable for becoming the CHO target cell of the UE.
  • only releasing the resources of the CHO target cell is used as an example for illustration.
  • the processing of the resources of the CHO target cell is the same as the processing scenario of releasing the resources of the CHO target cell, and the processing flow is similar.
  • Modifying the resources of the CHO target cell may be to increase or decrease the resources of the CHO target cell, so as to provide more matching resources for the UE.
  • the CHO resource change request indication information may include an identifier for distinguishing the CHO target cell, such as a target cell id list (Target Cell id List), target cell identifier
  • the list includes the cell ID of the target cell that determines the resource need to be changed.
  • the CHO target base station of the UE receives the CHO resource change request indication information sent by the source base station of the UE through the interface signaling between the base stations.
  • the interface signaling may be an Xn interface conforming to XnAP interface signaling.
  • Step S6020 The CHO target base station changes the resources of at least one CHO target cell indicated by the CHO resource change request indication information.
  • the CHO target base station After receiving the CHO resource change request indication information, the CHO target base station can directly determine to change the resource of at least one CHO target cell indicated in the CHO resource change request indication information according to the indication of the CHO resource change request indication information. The CHO target base station will change the allocated resources of at least one CHO target cell in response to the CHO resource change request indication information.
  • the CHO target base station When the CHO target base station changes the allocated resources of at least one CHO target cell, after the UE moves to the CHO target cell with the resource change, it can select the handover based on the transmission resources of the CHO target cell that has the resource change.
  • Target cell For example, the CHO resource change request indication information instructs the first CHO target cell of the first CHO target base station to release the allocated resources, so even if the UE moves within the range of the first CHO target cell, no handover measurement evaluation is performed on the first CHO target cell In this way, the pre-allocated resources for the first CHO target cell can be released in advance, and the processing burden of the UE during CHO handover is reduced.
  • the CHO resource change request indication information indicates that the first CHO target cell of the first CHO target base station is modified to reduce the allocated resources
  • the first CHO target cell and other can be switched
  • the CHO target cell performs handover measurement evaluation. Since the resources of the first CHO target cell have been modified and reduced, the UE will not be handed over to the first CHO target cell with a high probability. This can optimize the CHO handover process and enable the UE to perform CHO handover.
  • the target cell can be modified according to the resource usage of each cell to improve the resource utilization of the system and improve the user experience.
  • the CHO target base station of the UE first receives the CHO resource change request indication information sent by the source base station of the UE.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change at least one of the UEs.
  • CHO target cell resources and then the CHO target base station changes the resources of at least one CHO target cell indicated by the CHO resource change request indication information, which can control the use of system resources and avoid pre-allocating resources for all CHO target cells during CHO handover Excessive occupation of system resources can improve the resource utilization of the system, reduce the processing burden of the UE, and improve the user experience.
  • the CHO resource change request indication information includes an RRM measurement result related to at least one CHO target cell of the UE and an identifier of at least one CHO target cell.
  • the CHO target base station changes the resources of at least one CHO target cell indicated by the resource change request indication information, including: the CHO target base station determines whether to change the resource release/cancel request indication information according to the RRM measurement result related to at least one CHO target cell of the UE The resources of at least one CHO target cell.
  • the RRM measurement result related to at least one CHO target cell of the UE may be measured and reported by the UE to the source base station.
  • the CHO target base station After the source base station sends the CHO resource change request indication information including the RRM measurement result to at least one CHO target base station, the CHO target base station that receives the RRM measurement result can determine the CHO target that the UE may handover according to the RRM measurement result of the at least one CHO target cell Cell or determine the probability of UE handover to each CHO target cell. For example, if the RRM measurement result of the first CHO target cell is poor, it means that the UE is far away from the first CHO target cell or the network environment is poor. Even if the UE switches to the first CHO target cell, it will not be better.
  • the target base station to which the first CHO target cell belongs determines that the UE's RRM measurement result of the first CHO target cell is poor and is less than the preset threshold, you can choose to release the resources of the first CHO target cell to avoid UE handover To the first CHO target cell.
  • the CHO target base station of the UE receives the CHO resource change request indication information sent by the source base station of the UE.
  • the CHO target base station also needs to send CHO resource change request feedback information to the source base station.
  • the CHO resource change request feedback information includes whether the resources of at least one CHO target cell are changed, the result information after the change, and the identity of at least one CHO target cell. That is, only the CHO target base station that receives the CHO resource change request indication information knows exactly which CHO target cell's resources have been changed and the result of the change.
  • the CHO target base station needs to send the CHO resource change request feedback information to the source base station, so that the source base station knows whether the resources of at least one CHO target cell are changed and the result of the change. Then the source base station sends the CHO resource change notification to the UE.
  • the CHO resource change request indication information received by the CHO target base station may also need to be enforced, so the CHO target base station does not need to send the CHO resource change request feedback information, that is, if the CHO resource change request indication information is mandatory, the CHO target The base station does not send the CHO resource change request feedback information to the source base station.
  • the CHO resource change request indication information that needs to be fed back can be carried and sent using the Class1 process. However, the CHO resource change request indication information that does not need to be fed back can be carried and sent using the Class2 process.
  • the CHO resource change request indication information includes an expected probability factor related to at least one CHO target cell of the UE, and the expected probability factor is used to indicate the degree to which the source base station expects at least one CHO target cell to change resources.
  • the expected probability factor related to at least one CHO target cell of the UE is determined by the source base station according to the location of the UE or at least one type of measurement information fed back by the UE. For example, the source base station can determine the location and movement track of the UE according to various measurement information fed back by the UE, so as to predict the probability of the UE switching to each CHO target cell, and thereby determine the expected probability factor related to each CHO target cell.
  • the source base station can also determine the distance of the UE from each CHO target cell or the network quality after handover to each CHO target cell according to various measurement information fed back by the UE, and determine the expected probability factor related to each CHO target cell based on this.
  • the CHO target base station receives the CHO resource change request indication information, it determines whether to change the resources of each CHO target cell according to the expected probability factor related to each CHO target cell. For example, the lower the expected probability factor, the lower the probability of UE handover. If the expected probability factor is lower than a certain threshold, the resources of the CHO target cell with the expected probability factor lower than a certain threshold can be released. An expected probability factor of 100% indicates the highest expectation, and an expected probability factor of 1% indicates the lowest expectation.
  • FIG. 7 is a flowchart of another CHO resource processing method provided by an embodiment. As shown in FIG. 7, the method provided by this embodiment includes the following steps.
  • Step S7010 the source base station of the UE receives the CHO resource change notification indication information actively triggered by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resources of at least one CHO target cell of the UE. .
  • the CHO resource processing method provided in this embodiment is applied to a source base station that provides services for UEs in a mobile communication system.
  • the source base station refers to the base station that is serving the UE.
  • the UE accesses the mobile communication network through the source base station.
  • the source base station provides one or more cells.
  • the UE accesses the mobile communication network through a serving cell provided by the source base station at a time.
  • the serving cell the UE accesses is called the primary serving cell.
  • the primary serving cell When the UE is in a mobile state, it may leave the coverage of the primary serving cell and reach other serving cells. In order to ensure the continuity of UE communication services, a handover procedure needs to be performed.
  • conditional switching CHO
  • the CHO resource processing method provided in this embodiment is aimed at the CHO scenario shown in FIG. 4, that is, when the potential CHO scenario of the UE is performed among serving cells under the jurisdiction of multiple base stations.
  • the source base station triggers the change of the resources of at least one CHO target cell.
  • the CHO target base station triggers the change of the resources of at least one CHO target cell. Then the source base station of the UE will receive the CHO resource change notification indication information sent by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE.
  • the CHO target base station determines that the resources of at least one CHO target cell managed by the CHO target base station need to be changed according to its own resource usage or other possible factors. For example, when the first CHO target base station determines that the load of the first CHO target cell under its jurisdiction is too large, and therefore the first CHO target base station does not want the first CHO target cell to be called the UE’s CHO target cell again, the first CHO target base station determines Release the resources of the first CHO target cell.
  • the source base station In order for the UE to know that the target base station has determined to change the resources of at least one CHO target cell of the UE, thereby avoiding the access process in the CHO target cell that has released resources, or using the changed resources to access the CHO target cell, the source base station needs to receive CHO CHO resource change notification indication information sent by the target base station.
  • the CHO resource change notification indication information can be used to notify the source base station to provide the CHO target cell of the CHO target cell to release the resources of the CHO target cell, and it can also be used to notify the source base station to provide the CHO target cell of the CHO target cell to cancel the resources of the CHO target cell. Or it can also be used to notify the source base station that the CHO target base station that provides the CHO target cell to modify the resources of the CHO target cell. Both releasing and canceling the resources of the CHO target cell mean that the CHO target cell is no longer suitable for becoming the CHO target cell of the UE. In the following embodiments of this application, only releasing the resources of the CHO target cell is used as an example for illustration.
  • the processing of the resources of the CHO target cell is the same as the processing scenario of releasing the resources of the CHO target cell, and the processing flow is similar. Modifying the resources of the CHO target cell may be to increase or decrease the resources of the CHO target cell, so as to provide more matching resources for the UE.
  • the CHO resource change notification indication information may include an identifier for distinguishing the CHO target cell, such as a target cell id list (Target Cell ID List), target cell identifier The list includes the cell ID of the target cell that determines the resource need to be changed.
  • the source base station of the UE receives the CHO resource change notification indication information sent by the CHO target base station of the UE through the interface signaling between the base stations.
  • the interface signaling may be an Xn interface conforming to XnAP interface signaling.
  • Step S7020 The source base station sends a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed and the identity of at least one CHO target cell.
  • the source base station After the source base station receives the CHO resource change notification indication information sent by the CHO target base station of the UE, the source base station also needs to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resources of at least one CHO target cell have been changed, so that The UE also learns that the resources of at least one CHO target cell have changed. Then, after the UE moves to the CHO target cell with the resource change, it can select the target cell for handover according to the transmission resources of the CHO target cell with the resource change.
  • the CHO resource change notification indicates that the first CHO target cell of the first CHO target base station releases the allocated resources, and the CHO resource change notification sent by the source base station to the UE includes the resources of the first CHO target cell that have been released. Even if the UE moves within the range of the first CHO target cell, no handover measurement evaluation is performed on the first CHO target cell. This can release the pre-allocated resources for the first CHO target cell in advance and reduce the UE’s The processing burden when performing CHO switching.
  • the CHO resource change notification indication information informs the source base station that the first CHO target cell of the first CHO target base station is modified to reduce the allocated resources
  • the CHO resource change notification sent by the source base station to the UE includes that the resources of the first CHO target cell have been Modify the reduced information.
  • the UE moves to the range of the first CHO target cell, perform handover measurement evaluation on the first CHO target cell and other handoverable CHO target cells. Since the resources of the first CHO target cell have been modified and reduced, The UE will not be handed over to the first CHO target cell with a high probability. This can optimize the CHO handover process so that the target cell for the CHO handover of the UE can be modified according to the resource usage of each cell, which improves the resource utilization of the system and improves User experience.
  • the source base station of the UE first receives the CHO resource change notification indication information sent by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the UE.
  • the resource of at least one CHO target cell and then the source base station sends a CHO resource change notification to the UE.
  • the CHO resource change notification includes the information that the resource of at least one CHO target cell has been changed, which can control the utilization of system resources and avoid CHO handover Pre-allocating resources for all CHO target cells in excessive occupation of system resources can improve the resource utilization rate of the system, reduce the processing burden of the UE, and improve the user experience.
  • the CHO resource change notification indication information includes the reason for changing the resource of at least one CHO target cell and the identifier of the at least one CHO target cell.
  • Reasons for changing the resources of at least one CHO target cell include, for example, overload or failure.
  • the source base station of the UE can also send the CHO resource change notification feedback information to the CHO target base station.
  • the CHO resource change notification feedback information includes the source base station's confirmation at least Information about the resource change of a CHO target cell. That is, after receiving the CHO resource change notification indication information, the source base station can notify the CHO target base station that the source base station has learned the resource change information of at least one CHO target cell, and the CHO target base station can complete the resource change of at least one CHO target cell. change.
  • the CHO target base station changes the resources of at least one CHO target cell without receiving the CHO resource change notification feedback information sent by the source base station, it may cause the UE to fail to know that the resources of at least one CHO target cell are changed, and the UE Access failure caused by still accessing the CHO target cell with changed resources.
  • the CHO resource change notification indication information sent by the CHO target base station may also need to be enforced, and the source base station may not send the CHO resource change notification feedback information.
  • the CHO resource change notification indication information that needs to be fed back can be carried and sent using Class1 procedures. However, the CHO resource change notification indication information that does not need to be fed back can be carried and sent using the Class2 process.
  • the CHO resource change notification indication information includes a pre-configured expected probability factor related to at least one CHO target cell, and the pre-configured expected probability factor is used to indicate the degree to which the at least one CHO target cell expects to be pre-configured with CHO resources again.
  • the pre-configured expected probability factor related to at least one CHO target cell is determined by the CHO target base station according to the status of the at least one CHO target cell. After the resources of the at least one CHO target cell are changed, when the status of the at least one CHO target cell is restored Normally, the CHO target base station can expect to return to the normal CHO target cell as the UE's normal CHO target cell again.
  • the pre-configuration expected probability factor represents the degree to which at least one CHO target cell expects to be pre-configured by CHO again.
  • a preset expected probability factor of 100% indicates the highest expectation, and a preset expected probability factor of 1% indicates the lowest expectation.
  • the source base station of the UE before the source base station of the UE receives the CHO resource change notification indication information sent by the CHO target base station of the UE, it further includes: the source base station sends the CHO resource change permission indication information to the CHO target base station, and the CHO resource change permission indication information is used for Allow the CHO target base station to actively trigger the change of the resources of at least one CHO target cell. Since the UE currently accesses the source cell, the processing of the transmission resources used by the UE should be triggered by the source base station. In the embodiment shown in FIG. 7, the CHO target base station of the UE triggers the change of at least the UE. The resources of a CHO target cell, which may cause conflicts between the source base station and the CHO target base station. Therefore, the source base station may first send the CHO resource change permission indication information to the CHO target base station, and then the CHO target base station actively triggers the resource change of the CHO target cell and sends the CHO resource change notification indication information to the source base station.
  • FIG. 8 is a flowchart of another CHO resource processing method provided by an embodiment. As shown in FIG. 8, the method provided by this embodiment includes the following steps.
  • Step S8010 The CHO target base station of the UE determines to change the resource of at least one CHO target cell configured for the UE.
  • Step S8020 the CHO target base station actively triggers to send the CHO resource change notification indication information to the source base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE.
  • the CHO resource processing method provided in this embodiment is applied to the CHO target base station where the UE performs conditional handover in a mobile communication system.
  • the CHO resource processing method provided in this embodiment is a processing procedure on the side of the CHO target base station in the embodiment shown in FIG. 7, and its implementation principle and technical effect are similar to the embodiment shown in FIG. 7.
  • the method of resource processing by the CHO target base station as the execution subject is also described in the embodiment shown in FIG. 6, so those skilled in the art can learn the specific implementation of this embodiment in conjunction with the embodiments shown in FIG. 7 and FIG. The process will not be repeated here.
  • the CHO resource change notification indication information includes the reason for changing the resource of at least one CHO target cell and the identifier of the at least one CHO target cell.
  • the CHO resource change notification indication information includes a pre-configured expected probability factor related to at least one CHO target cell, and the pre-configured expected probability factor is used to indicate at least one CHO target The extent to which the cell expects to be pre-configured by CHO again.
  • the method further includes:
  • the CHO target base station receives the CHO resource change notification feedback information sent by the source base station, and the CHO resource change notification feedback information includes the result information of the source base station confirming the resource change of at least one CHO target cell.
  • the CHO target base station before the CHO target base station sends the CHO resource change notification indication information to the UE and the source base station, it further includes: the CHO target base station receives the CHO resource change permission sent by the source base station Indication information, the CHO resource change permission indication information is used to allow the CHO target base station to actively trigger the change of resources of at least one CHO target cell.
  • the CHO target base station sends the CHO resource change notification indication information to the UE and the source base station, including: the CHO target base station sends the CHO resource change notification to the UE through the interface signaling between the base stations.
  • the source base station sends CHO resource change notification indication information.
  • the CHO resource change notification indication information includes at least one of CHO resource release notification indication information, CHO resource cancellation notification indication information, and CHO resource modification notification indication information .
  • a certain UE is already in CHO operation, and two target cells Cell3 and Cell4 have been pre-configured for the UE CHO in a certain Target Node (gNB or ng-eNB).
  • the Source Node decides to release/cancel Cell4 (to reduce the UE’s CHO evaluation burden and CHO resources) Inactive reserved occupation).
  • Step 1 The Source Node sends an XnAP: Handover Cancel (Handover Cancel) message, which contains instructions for requesting the Target Node to release/cancel Cell4.
  • Step 2 Target Node always obeys the release/cancel request, so it releases/cancels the CHO pre-configured resources related to Cell4.
  • Step 3 The Source Node informs the UE through the air interface RRC reconfiguration process message that Cell4 has been released/cancelled, and there is no need to perform CHO evaluation or handover attempts on it.
  • a certain UE is already in CHO operation, and three target cells Cell3, Cell4 and Cell5 have been pre-configured for the UE CHO in a certain target base station TargetNode (gNB or ng-eNB).
  • TargetNode gNB or ng-eNB
  • the Source Node gNB or ng-eNB decides to release/cancel Cell3 and Cell4 (to reduce the UE’s CHO evaluation burden, and CHO resources are reserved and occupied).
  • Step 1 The Source Node sends an XnAP: Handover Request (Handover Request) message, which contains instructions requesting the Target Node to release/cancel Cell3 and Cell4, and attaches the latest RRM measurement results of Cell3 and Cell4.
  • Step 2 According to the latest RRM measurement results of Cell3 and Cell4, the Target Node decides to still keep Cell3, but release/cancel Cell4 immediately, so only release/cancel the CHO pre-configured resources related to Cell4.
  • Step 3 Target Node needs to reply XnAP: Handover Request Acknowledge message to Source Node, which contains the latest CHO pre-configuration information of Cell3 and the result information of successful release/cancellation of Cell4.
  • Step 4 The Source Node informs the UE through the air interface RRC reconfiguration process message that Cell3 has not been released/cancelled but the CHO pre-configuration has been updated; Cell4 has been released/cancelled, and there is no need to perform CHO evaluation or handover attempts on it.
  • a certain UE is already in CHO operation, and three target cells Cell3, Cell4 and Cell5 have been pre-configured for the UE CHO in a certain target base station TargetNode (gNB or ng-eNB).
  • TargetNode gNB or ng-eNB
  • the Source Node decides to release/cancel Cell4 (to reduce the UE’s burden of CHO evaluation, and CHO resources do nothing. Reserved for occupation).
  • Step 1 The Source Node sends an XnAP: Handover Request (Handover Request) message, which contains instructions for requesting the Target Node to release/cancel Cell4, and attaches an expected probability factor of 50% related to Cell4.
  • Step 2 Target Node decides to keep Cell4 according to the expected probability factor of 50% of release/cancellation sent by the source base station, but reconfigure the CHO pre-configured resources of Cell4.
  • Step 3 Target Node needs to reply XnAP: Handover Request Acknowledge message to Source Node, which contains the latest CHO pre-configuration information of Cell4.
  • Step 4 The Source Node informs the UE through the air interface RRC reconfiguration process message that Cell4 has not been released/cancelled but its CHO preconfiguration has been updated.
  • a certain UE is already in CHO operation, and four target cells Cell2, Cell3, Cell4 and Cell5 have been pre-configured for the UE CHO in a certain target base station Target Node (gNB or ng-eNB).
  • Target Node gNB or ng-eNB
  • the Source Node decides to release/cancel Cell3/4/5 (to reduce the UE’s CHO Assessment burden, and reserved occupation of CHO resources without action).
  • Step 1 Source Node sends XnAP: Handover Cancel (Handover Cancel) message, which contains instructions for requesting Target Node to release/cancel Cell3/4/5 at the same time.
  • Step 2 Target Node always obeys the release/cancel request, so it releases/cancels the CHO pre-configured resources related to Cell3/4/5.
  • Step 3 The Source Node informs the UE through the air interface RRC reconfiguration process message that Cell3/4/5 have been released/cancelled, and there is no need to perform CHO evaluation or handover attempts on them.
  • a certain UE is already in CHO operation, and four target cells Cell2, Cell3, Cell4 and Cell5 have been pre-configured for the UE CHO in a certain target base station Target Node (gNB or ng-eNB).
  • Target Node gNB or ng-eNB
  • the target base station decides to actively release/cancel Cell4/5 (to reduce the CHO evaluation of the UE) Burden, and CHO resources are reserved and occupied).
  • Step 1 The Target Node sends an XnAP: Handover Cancel (Handover Cancel) message, which contains the indication information for the target base station to actively release/cancel Cell4/5 at the same time.
  • Step 2 The Source Node always obeys the release/cancellation instruction, so it is learned that the target base station actively releases/cancels the CHO pre-configured resources related to Cell4/5.
  • Step 3 The Source Node informs the UE through the air interface RRC reconfiguration process message that Cell4/5 has been released/cancelled, and there is no need to perform CHO evaluation or handover attempts on them.
  • a certain UE is already in CHO operation, and three target cells Cell2, Cell3, and Cell4 have been pre-configured for the UE CHO in a certain target base station Target Node (gNB or ng-eNB).
  • Target Node gNB or ng-eNB
  • the target base station wants to change the CHO pre-configuration information related to Cell3, and at the same time, it does not want Cell4 to become the target cell of the UE. Therefore, the target base station (gNB or ng-eNB) ) Decided to actively modify Cell3 and release/cancel Cell4 (to reduce the UE's burden of CHO evaluation and the useless reservation of CHO resources).
  • Step 1 The Target Node sends an XnAP: CHO Modification Required (CHO Modification Required) message, which contains the latest CHO pre-configuration information related to Cell3 that is actively modified by the target base station, and releases/cancels the indication information of Cell4.
  • Step 2 The Source Node always obeys the target cell modification and release/cancellation instructions, so it learns that the target base station has actively modified the CHO pre-configuration information related to Cell3 and releases/cancels the CHO pre-configuration resources related to Cell4.
  • Step 3 The Source Node sends an XnAP: CHO Modification Confirm message to the Target Node to confirm the modification and release/cancellation of the target cell.
  • Step 4 The Source Node informs the UE through the air interface RRC reconfiguration process message that the latest CHO pre-configuration information related to Cell3 has been modified, and Cell4 has been released/cancelled, and there is no need to perform CHO evaluation or handover attempts on it.
  • a certain UE is already in CHO operation, and three target cells Cell2, Cell3, Cell4 have been pre-configured for the UE CHO in a certain target base station Target Node (gNB or ng-eNB).
  • Handover Request Handover Request
  • Step 2 Target Node replies to XnAP: Handover Request Acknowledge (Handover Request Acknowledge) message and always obeys the above instructions, so it does not actively initiate the release/cancellation of CHO resources related to the target cells Cell2, Cell3, and Cell4.
  • Handover Request Acknowledge Handover Request Acknowledge
  • FIG. 9 is a schematic structural diagram of a CHO resource processing device provided by an embodiment. As shown in FIG. 9, the CHO resource processing device provided in this embodiment includes:
  • the first sending module 91 is configured to send CHO resource change request indication information to at least one CHO target base station of the UE, where the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE;
  • the second sending module 92 is configured to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resource of at least one CHO target cell is changed and at least one CHO target cell identifier.
  • the CHO resource processing device provided in this embodiment is used to implement the CHO resource processing method of the embodiment shown in FIG. 5, and the implementation principles and technical effects of the CHO resource processing device provided in this embodiment are similar, and will not be repeated here.
  • Fig. 10 is a schematic structural diagram of another CHO resource processing device provided by an embodiment. As shown in Fig. 10, the CHO resource processing device provided in this embodiment includes:
  • the first receiving module 101 is configured to receive CHO resource change request indication information sent by the source base station of the UE.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resource of at least one CHO target cell of the UE; a resource change module 102. Set to change the resource of at least one CHO target cell indicated by the CHO resource change request indication information.
  • the CHO resource processing device provided in this embodiment is used to implement the CHO resource processing method of the embodiment shown in FIG. 6.
  • the implementation principle and technical effect of the CHO resource processing device provided in this embodiment are similar, and will not be repeated here.
  • FIG. 11 is a schematic structural diagram of another CHO resource processing device provided by an embodiment. As shown in FIG. 11, the CHO resource processing device provided in this embodiment includes:
  • the second receiving module 111 is configured to receive the CHO resource change notification indication information sent by the CHO target base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resource of at least one CHO target cell of the UE;
  • the third sending module 112 is configured to send a CHO resource change notification to the UE.
  • the CHO resource change notification includes information that the resource of at least one CHO target cell has been changed and the identity of at least one CHO target cell.
  • the CHO resource processing device provided in this embodiment is used to implement the CHO resource processing method of the embodiment shown in FIG. 7.
  • the implementation principle and technical effect of the CHO resource processing device provided in this embodiment are similar, and will not be repeated here.
  • FIG. 12 is a schematic structural diagram of a CHO resource processing device provided by an embodiment. As shown in FIG. 12, the CHO resource processing device provided in this embodiment includes:
  • the resource determining module 121 is configured to determine the resources of at least one CHO target cell configured for the UE; the fourth sending module 122 is configured to actively trigger the sending of CHO resource change notification indication information and the CHO resource change notification indication information to the source base station of the UE Used to notify the source base station CHO that the target base station has determined to change the resources of at least one CHO target cell of the UE.
  • the CHO resource processing device provided in this embodiment is used to implement the CHO resource processing method in the embodiment shown in FIG. 8.
  • the implementation principle and technical effect of the CHO resource processing device provided in this embodiment are similar, and will not be repeated here.
  • FIG. 13 is a schematic structural diagram of a CHO resource processing system provided by an embodiment.
  • the CHO resource processing system provided in this embodiment includes: a source base station 131 and multiple CHO target base stations 132.
  • the source base station 131 includes the CHO resource processing device as shown in FIG. 9, and the CHO target base station 132 includes the CHO resource processing device as shown in FIG. 10.
  • the source base station 131 includes the CHO resource processing device as shown in FIG. 11, and the CHO target base station 132 includes the CHO resource processing device as shown in FIG.
  • the CHO resource processing system includes three CHO target base stations 132 as an example for description, but in reality, the number of CHO target base stations 132 is at least one.
  • FIG. 14 is a schematic structural diagram of a source base station provided by an embodiment.
  • the source base station includes a processor 141, a memory 142, a transmitter 143, and a receiver 144; the number of processors 141 in the source base station can be It is one or more.
  • one processor 141 is taken as an example; the processor 141 and the memory 142, the transmitter 143 and the receiver 144 in the source base station can be connected through a bus or other methods.
  • FIG. Connect as an example.
  • the memory 142 can be configured to store software programs, computer-executable programs, and modules, such as the program instructions/modules corresponding to the CHO resource processing method in the embodiment of FIG. 5 or FIG. 7 of this application (for example, The first sending module 91 and the second sending module 92 in the CHO resource device or the second receiving module 111 and the third sending module 112 in the CHO resource device).
  • the processor 141 runs the software programs, instructions, and modules stored in the memory 142 to source at least one functional application and data processing of the base station, that is, realize the above-mentioned CHO resource processing method.
  • the memory 142 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required for at least one function; the data storage area may store data created according to the use of the terminal, etc.
  • the memory 142 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 143 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 144 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • FIG. 15 is a schematic structural diagram of a CHO target base station provided by an embodiment.
  • the CHO target base station includes a processor 151, a memory 152, a transmitter 153, and a receiver 154; the processor 151 in the CHO target base station The number can be one or more.
  • one processor 151 is taken as an example; the processor 151 and the memory 152, the transmitter 153 and the receiver 154 in the CHO target base station; they can be connected by bus or other means, Figure 15 Take the bus connection as an example.
  • the memory 152 can be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the CHO resource processing method in the embodiment of FIG. 6 or FIG. 8 of this application (for example, The first receiving module 101 and the resource changing module 102 in the CHO resource device or the resource determining module 121 and the fourth sending module 122 in the CHO resource device).
  • the processor 151 runs the software programs, instructions, and modules stored in the memory 152 to thereby implement at least one functional application and data processing of the CHO target base station, that is, to implement the above-mentioned CHO resource processing method.
  • the memory 152 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required for at least one function; the data storage area may store data created according to the use of the terminal, etc.
  • the memory 152 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 153 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 154 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to execute a CHO resource processing method when executed by a computer processor.
  • the method includes: A CHO target base station sends CHO resource change request indication information.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resources of at least one CHO target cell of the UE; the source base station sends a CHO resource change notification to the UE, CHO resource change
  • the notification includes information that the resource of at least one CHO target cell is changed and the identification of at least one CHO target cell.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to execute a CHO resource processing method when executed by a computer processor.
  • the method includes: the UE’s CHO target base station receives the UE’s The CHO resource change request indication information sent by the source base station.
  • the CHO resource change request indication information is used to instruct at least one CHO target base station to change the resources of at least one CHO target cell of the UE; at least one CHO indicated by the CHO target base station change resource change request indication information Resources of the target cell.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to execute a CHO resource processing method when executed by a computer processor.
  • the method includes: a source base station of the UE receives the CHO of the UE The target base station actively triggers the sending of the CHO resource change notification indication information.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change the resources of at least one CHO target cell of the UE; the source base station sends a CHO resource change notification to the UE,
  • the CHO resource change notification includes information that the resources of at least one CHO target cell have been changed and the identification of at least one CHO target cell.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to execute a CHO resource processing method when executed by a computer processor.
  • the method includes: the CHO target base station of the UE determines to change to The resource of at least one CHO target cell configured by the UE; the CHO target base station actively triggers to send the CHO resource change notification indication information to the source base station of the UE.
  • the CHO resource change notification indication information is used to notify the source base station that the CHO target base station has determined to change at least one of the UEs Resources of the CHO target cell.
  • user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
  • the embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware.
  • Computer program instructions can be assembly instructions, instruction set architecture (Instruction Set Architecture, ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented by any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disc (CD), etc.
  • Computer readable media can include non-transitory storage media.
  • the data processor can be any suitable for the local technical environment Types, such as but not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs), programmable logic devices (Field-Programmable Gate Array) , FGPA) and processors based on multi-core processor architecture.
  • DSP Digital Signal Processing
  • ASICs application specific integrated circuits
  • FGPA programmable logic devices
  • processors based on multi-core processor architecture such as but not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs), programmable logic devices (Field-Programmable Gate Array) , FGPA) and processors based on multi-core processor architecture.

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Abstract

本申请提出一种CHO资源处理方法、装置和系统，一种CHO资源处理方法包括：UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。

Description

CHO资源处理方法、装置和系统
本申请要求在2019年7月29日提交中国专利局、申请号为201910691402.3的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信网络，例如涉及一种CHO资源处理方法、装置和系统。
背景技术
在第五代移动通信(5th Generation，5G)系统中，包含了5G核心网(5G Core，5GC)和下一代无线接入网(Next Generation Radio Access Network，NG-RAN)两大子系统。NG-RAN中至少包含两种不同无线接入制式(Radio Access Technology，RAT)类型的基站。
NG-RAN基站通过切换(Handover)流程来保持用户设备(User Equipment，UE)通信业务的连续性，即把UE的通信报文从源服务节点/小区(Source Node/Cell)，尽量平滑地前敌到目标服务节点/小区(Target Node/Cell)。切换流程通常包含“切换准备”、“切换执行”、“切换完成”三大阶段。在传统的非条件切换过程中，“切换准备”和“切换执行”两个阶段在时间上是连续的。
但非条件切换机制是针对低频段非密集小区部署而设计的，随着网络演进容量扩充，在同构网络之上还部署了异构网络，密集部署的众多小区导致在执行切换时存在众多的选择。因此在第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)中引入了条件切换(Conditional Handover，CHO)机制。在CHO过程中“CHO切换准备”和“CHO切换执行”两个阶段在时间上被较大地分隔开。源小区基于UE的无线测量结果上报测量报告(Measuerment Report)和本地无线资源管理(Radio Resources Management，RRM)策略，开 启“CHO切换准备”流程，请求多个潜在/候选的目标小区完成“CHO切换准备”流程相关的目标侧资源预留配置，并通过空口无线资源控制(Radio Resources Control，RRC)信令将CHO预配置信息发送给UE。随后UE并不立即开启“CHO切换执行”流程，而是等到稍后某个UE本地评估“实际切换条件”被满足的时刻，UE才向某个合适的目标小区执行CHO切换操作。
但在CHO过程的“CHO切换准备”过程中，每个潜在/候选的目标小区都需要进行通信资源的预留配置，只有UE在“CHO切换执行”流程中执行了实际的CHO切换后，才会释放未切换的目标小区预留的资源，这将占用大量的系统资源。
发明内容
本申请提供一种CHO资源处理方法、装置和系统，可以提高系统的资源利用率，且降低UE的处理负担，提高用户的使用体验。
本申请实施例提供一种CHO资源处理方法，包括：
UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；
源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例提供一种CHO资源处理方法，包括：
UE的CHO目标基站接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；
CHO目标基站变更CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
本申请实施例提供一种CHO资源处理方法，包括：
UE的源基站接收UE的CHO目标基站发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源；
源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例提供一种CHO资源处理方法，包括：
UE的CHO目标基站确定变更为UE配置的至少一个CHO目标小区的资源；
CHO目标基站主动触发向UE的源基站发送CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
本申请实施例提供一种CHO资源处理装置，包括：
第一发送模块，设置为向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；
第二发送模块，设置为向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例提供一种CHO资源处理装置，包括：
第一接收模块，设置为接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；
资源变更模块，设置为变更CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
本申请实施例提供一种CHO资源处理装置，包括：
第二接收模块，设置为接收UE的CHO目标基站发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源；
第三发送模块，设置为向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例提供一种CHO资源处理装置，包括：
资源确定模块，设置为确定变更为UE配置的至少一个CHO目标小区的资源；
第四发送模块，设置为主动触发向UE的源基站发送CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
本申请实施例提供一种CHO资源处理系统，CHO资源处理包括源基站和至少一个目标基站；
源基站包括图9所示实施例所述的CHO资源处理装置；
至少一个目标基站包括图10所示实施例所述的CHO资源处理装置。
本申请实施例提供一种CHO资源处理系统，CHO资源处理包括源基站和至少一个目标基站；
源基站包括图11所示实施例所述的CHO资源处理装置；
至少一个目标基站包括图12所示实施例所述的CHO资源处理装置。
附图说明
图1为聚合式NG-RAN基站集中式处理单元/分布式处理单元空口协议栈不分离情况下的网络架构图；
图2为分离式NG-RAN基站CU/DU空口协议栈分离情况下的网络架构图；
图3为一实施例提供的条件切换的场景示意图；
图4为另一实施例提供的条件切换的场景示意图；
图5为一实施例提供的一种CHO资源处理方法的流程图；
图6为一实施例提供的另一种CHO资源处理方法的流程图；
图7为一实施例提供的另一种CHO资源处理方法的流程图；
图8为一实施例提供的另一种CHO资源处理方法的流程图；
图9为一实施例提供的一种CHO资源处理装置的结构示意图；
图10为一实施例提供的另一种CHO资源处理装置的结构示意图；
图11为一实施例提供的另一种CHO资源处理装置的结构示意图；
图12为一实施例提供的另一种CHO资源处理装置的结构示意图；
图13为一实施例提供的一种CHO资源处理系统的结构示意图；
图14为一实施例提供的一种源基站的结构示意图；
图15为一实施例提供的一种CHO目标基站的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行详细说明。
作为第四代移动通信(4th Generation，4G)长期演进(Long Term Evolution，LTE)通信系统的发展，5G通信系统中包含了5GC和NG-RAN两大子系统。5GC包含接入移动功能节点(Access Mobility Function，AMF)，会话管理功能节点(Session Management Function，SMF)和用户面功能节点(User Plane Function，UPF)等网络实体或节点。而NG-RAN中至少包含了两种不同RAT类型的基站，即：基于4G演进型基站(evolved NodeB，eNB)继续平滑演进的下一代eNB(next generation eNB，ng-eNB)，ng-eNB的空口仍支持进化的陆地无线接入(Evolved-Universal Terrestrial Radio Access，E-UTRA)RAT制式，和全新物理层空口设计的gNB，gNB的空口支持新无线电(New Radio，NR)RAT制式，以及相关网元节点实体之间的逻辑接口。
NG-RAN基站(gNB或ng-eNB)通过标准化的NG接口，和5GC双向连接(包含用于信令传输的NG-C控制面连接和用于用户数据传输的NG-U用户面连接)。而NG-RAN基站(gNB或ng-eNB)彼此之间通过Xn接口双向连接(包含Xn-C控制面连接和Xn-U用户面连接)。图1为聚合式NG-RAN基站(Aggregated NG-RAN)集中式处理单元/分布式处理单元(Centralized  Unit/Distributed Unit，CU/DU)空口协议栈不分离情况下的网络架构图。图2为分离式NG-RAN基站(Disaggregated NG-RAN)CU/DU空口协议栈分离情况下的网络架构图。以当前3GPP已支持的gNB-CU/DU分离为例，单个gNB被分离为单个gNB-CU和多个gNB-DU网络节点实体，它们之间通过标准化的F1接口双向连接，包含F1-C控制面连接和F1-U用户面连接。CU/DU分离后的gNB和不分离的gNB/ng-eNB对外呈现的逻辑接口仍然都是NG和Xn接口。上述各个网络侧逻辑接口(NG，Xn，F1)的控制面连接用于传输网络实体或节点之间的控制信令消息，而用户面连接用于传输用户业务数据(包)。NG应用协议(NG Application Protocol，NGAP)，Xn应用协议(Xn Application Protocol，XnAP)，F1应用协议(F1Application Protocol，F1AP)分别为NG-C，Xn-C，F1-C控制面逻辑网络应用层(Radio Network Layer，RNL)协议，各协议规范了各个逻辑接口上的信令流程消息。
NG-RAN基站通过切换流程，来保持终端用户通信业务(会话)的连续性，即把终端UE的通信上下文从源服务基站小区(Source Node/Cell)，尽量平滑地迁移到目标服务基站小区(Target Node/Cell)。切换流程通常包含“切换准备”，“切换执行”，“切换完成”三大阶段。在“切换准备”阶段，源服务基站小区(后简称：源基站或源小区)和目标服务基站小区(后简称：目标基站或目标小区)基于网络逻辑接口的信令流程进行协商，以确定目标侧通讯资源的预留配置和空口切换命令(Handover Command)的配置内容；在“切换执行”阶段，源服务基站小区把空口切换命令包含在RRC空口信令中发送给UE，于是UE向指定的目标基站小区尝试进行切换操作；在“切换完成”阶段，源服务基站小区和目标服务基站小区再次进行信令流程协商，以通知切换结果，释放掉源侧不再需要使用的通讯资源和UE通讯上下文。
在传统非条件切换过程中，“切换准备”和“切换执行”两个阶段是时间上连续的，即时间间隔不大。源小区基于终端UE的无线测量结果上报测量报告 (Measurement Report)和本地无线资源管理(Radio Resource Management，RRM)策略，开启“切换准备”流程。当指定的目标基站小区(通常只有一个目标主基站和一个目标主服务小区)完成了“切换准备”流程相关的目标侧资源预留配置之后，源小区随即空口开启“切换执行”，终端UE随即执行切换命令，尝试向目标基站小区切换。因此终端UE的“实际切换时刻”和接收到空口切换命令在时间上是紧密连续的。源小区发送的空口切换命令通常是在终端UE和网络侧同时满足“实际切换条件”时才发送给UE。这里“实际切换条件”是指指定的目标基站小区的无线信号质量足够好且通讯资源预留足够且配置合理，UE成功地切换到目标基站小区后，可保持至少一部分业务的连续性。
而传统非条件切换机制，最初是针对低频段非密集小区部署而设计的，随着网络演进容量扩充，在同构网络之上还部署了异构网络(HetNet)，比如：在蜂窝宏小区覆盖范围内还部署了许多的小小区(Small Cells)。在5G系统中，除了使用低频段资源，还将使用高达100GHz的高频段资源，这些高频小区通常只能以密集小小区的形式被部署小小区集合(Small Cell Cluster)，众多的小区导致在执行切换时存在众多的选择，传统的非条件切换机制已经不适用。因此，3GPP引入了条件切换机制(CHO)。
在条件切换过程中，“CHO切换准备”和“CHO切换执行”两个阶段在时间上被较大地分割开，即允许它们之间有较大的时间间隔。源小区基于UE的无线测量结果上报Measurement Report和本地RRM策略，开启“CHO切换准备”流程，请求多个潜在/候选目标基站小区(Potential/Candidate Target Node/Cells)完成“CHO切换准备”流程相关的目标侧资源预留配置，并且通过空口RRC信令提前把CHO预配置信息发给UE。随后源小区并不立即开启“CHO切换执行”，终端UE并不立即向某个合适的目标基站小区执行CHO切换操作，而是等到稍后某个UE本地评估“实际切换条件”被满足的时刻，终端UE才向某个合适的目标基站小区执行CHO切换操作。因此终端UE的“实际切换时刻”和接收到 空口CHO切换命令在时间上是不连续的。通过CHO机制，源小区可在源侧无线链路状况尚好的时候(比如：非小区边缘)，提前进行多个目标侧(小区)资源的预留配置，终端UE根据本地动态情况，选择最合适的目标小区执行切换，从而能减轻切换失败概率，提升用户业务体验等。
图3为一实施例提供的条件切换的场景示意图，如附图3所示，某个源基站辖有Cell1/2/3/4/5/6/7本地小区，Cell1是某终端UE1的当前主服务小区，随着UE1的无定向移动，Cell2/3/4/5/6/7相邻小区都可能成为该UE1的潜在/候选目标小区，因此为了增强移动鲁棒性提升用户体验，源基站可通过CHO机制，把Cell2/3/4/5/6/7小区都预配置为UE的潜在/候选目标基站小区，当后续UE1在移动中本地评估到“实际切换条件”被满足的时刻，UE1便向那个满足CHO条件的目标小区执行CHO切换操作。当CHO涉及跨不同基站操作的时候，源基站需要和相邻基站基于接口信令流程，进行CHO预配置协商和“CHO切换准备”。
图4为另一实施例提供的条件切换的场景示意图，如附图4所示，某个源基站辖有Cell1/2/7本地小区，而相邻基站1(Neighbor node1)和邻基站2(Neighbor node2)分别辖有Cell3/4本地小区和Cell5/6本地小区，Cell1是某终端UE2的当前主服务小区，随着UE2的无定向移动，Cell2/3/4/5/6/7小区也都可能成为该UE2的潜在/候选目标小区，因此为了增强移动鲁棒性，源基站可通过CHO机制和相邻基站协商，把Cell3/4/5/6小区都预配置为UE的潜在/候选目标基站小区。针对上述潜在/候选目标基站小区，除了和每个潜在/候选目标小区相关的“CHO添加(初始预配置)”操作，还有“CHO修改(重新预配置)”和“CHO释放(删除预配置)”的操作。“CHO添加”和“CHO修改”操作是为了使得CHO机制能工作，因为目标基站小区必须要为UE进行通讯资源的预留配置；而“CHO释放”(或称为CHO取消)操作则极大影响到CHO机制的工作效率和对系统资源的占用。
图5为一实施例提供的一种CHO资源处理方法的流程图，如图5所示，本实施例提供的方法包括如下步骤。
步骤S5010，UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理方法应用于移动通信系统中为UE提供服务的源基站。其中源基站是指正在为UE提供服务的基站。UE通过源基站接入移动通信网络，源基站提供一个或多个小区，UE在一个时刻通过源基站提供的一个服务小区接入移动通信网络，UE所接入的服务小区称为主服务小区。当UE处于移动状态时，可能离开主服务小区的覆盖范围，到达其他服务小区，为了保证UE通信业务的连续性，需要执行切换流程。由于非条件切换的切换准备和切换完成流程在时间上时连续的，即当确定目标小区的资源满足切换需求时立即执行切换，不存在占用资源的问题，因此在本申请实施例中，仅对条件切换(CHO)的情况进行讨论，本申请实施例下述的切换均指条件切换。
如图3所示，当UE在一个基站所提供的多个服务小区间进行条件切换时，由于多个服务小区都是由一个基站提供的，并没有额外的基站需要为UE预先配置通信资源，因此在图3所示的在一个基站所提供的多个服务小区间进行条件切换时，对工作效率和系统资源的占用的影响不大。而在图4所示的场景中，当UE接入的主服务小区附近存在多个其他基站提供的服务小区时，为了保证UE通信业务的连续性，在CHO机制中需要UE所处主服务小区附近的其他多个UE可能前往的服务小区的基站均为UE预先配置传输资源。而实际上UE仅会移动至一个服务小区并完成切换，其他并未切换至的服务小区所预留的传输资源将长时间被占用，这将占用较多的系统资源。
因此本实施例提供的CHO资源处理方法针对图4所示的CHO场景，也就是当UE潜在的CHO场景在多个基站所辖的服务小区间进行。UE的移动轨迹 是连续的，因此UE在进行CHO时，必然从当前所处主服务小区切换至相邻的服务小区。但由于无法准确确定UE所要移动的方向，主服务小区相邻的小区都是UE潜在/候选的目标小区，而提供目标小区的基站成为CHO目标基站。各目标小区对应的目标基站均要为UE预先配置传输资源。但实际上，由于UE的移动轨迹在某些情况下是可以被预测的，例如处于匀速移动状态的UE大概率会朝向原有移动方向继续移动，极小概率会向当前移动方向相反的方向移动，因此UE切换至各CHO目标小区的概率是不同的，为切换概率极低的CHO目标小区预先配置的传输资源被使用的概率也极低，因此可以考虑提前释放掉这部分传输资源。或者UE的某些CHO目标小区中的负荷已经很重，若UE再切换至负荷严重的CHO目标小区，将影响小区中已接入其他UE的通信业务，或者将无法为待切换的UE提供满足需求的通信业务，此时也可以避免UE切换至负荷严重的CHO目标小区，提前释放掉这类小区为UE预先配置的传输资源。或者在其他的情况下，当UE的CHO目标小区不适合成为UE的目标小区时，都可以提前释放或取消该目标小区为UE预先配置的传输资源。
UE的源基站能够获取到UE的各种信息和参数，以及通过基站间的传输通道获取其他基站的相关信息，因此UE的源基站能够获知UE的CHO目标小区是否适合切换。当UE的源基站确定UE的一个或多个CHO目标小区已经不适合成为UE的CHO目标小区时，UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源。UE的源基站确定的不适合成为UE的一个或多个CHO目标小区可能分别由一个或多个UE的CHO目标基站所提供，UE需要向每个确定的CHO目标小区所对应的CHO目标基站发送CHO资源变更请求指示信息。CHO资源变更请求指示信息，可以用于指示提供CHO目标小区的CHO目标基站释放CHO目标小区的资源，还可以用于指示提供CHO目标小区的CHO目标基站取消CHO目标小区的资源，或者还可以用于指示提供CHO目标小区的CHO目标基站修改CHO目标小区的资 源。其中释放和取消CHO目标小区的资源都意味着该CHO目标小区已经不适合成为UE的CHO目标小区，在本申请下述各实施例中，仅以释放CHO目标小区的资源为例进行说明，取消CHO目标小区的资源的处理与释放CHO目标小区的资源的处理场景相同，处理流程类似。而修改CHO目标小区的资源，可以是增加或减少该CHO目标小区的资源，以便为UE提供更匹配的资源。
为了区分CHO资源变更请求指示信息所要求变更资源的CHO目标小区，CHO资源变更请求指示信息中可以包括用于区分CHO目标小区的标识，例如目标小区标识列表(Target Cell id List)，目标小区标识列表中包括确定需要变更资源我的CHO目标小区的小区标识。
在一实施例中，UE的源基站通过基站间的接口信令向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息。该接口信令可以是Xn接口符合XnAP的接口信令。
步骤S5020，源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
在源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息后，接收到CHO资源变更请求指示信息的CHO目标基站将确定变更CHO资源变更请求指示信息中所指示的至少一个CHO目标小区的资源。CHO目标基站将响应于CHO资源变更请求指示信息，对至少一个CHO目标小区已分配的资源进行变更。
源基站还需要向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息，使得UE也获知至少一个CHO目标小区的资源发生了变更。那么UE在移动发生了资源变更的CHO目标小区后，就可以根据发生了资源变更的CHO目标小区的传输资源，选择切换的目标小区。例如CHO资源变更请求指示信息指示第一CHO目标基站的第一CHO目标小区 释放已分配的资源，那么源基站向UE发送的CHO资源变更通知中包括第一CHO目标小区的资源已被释放的信息，即使UE移动至第一CHO目标小区的范围内，也不对第一CHO目标小区进行切换测量评估，这样既可以提前释放掉为第一CHO目标小区预先分配的资源，又减少了UE在进行CHO切换时的处理负担。若CHO资源变更请求指示信息指示第一CHO目标基站的第一CHO目标小区修改减少已分配的资源，那么源基站向UE发送的CHO资源变更通知中包括第一CHO目标小区的资源已被修改减少的信息，当UE移动至第一CHO目标小区的范围内，对第一CHO目标小区和其他可切换的CHO目标小区进行切换测量评估，由于第一CHO目标小区的资源已被修改减少，UE将大概率地不会切换至第一CHO目标小区，这样可以优化CHO切换流程，使得UE进行CHO切换的目的小区可以根据各小区的资源使用情况进行修改，提高系统的资源利用率，并提高用户的使用体验。
本实施例提供的CHO资源处理方法，首先由UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源，然后源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息，可以使系统资源被可控的利用，避免在CHO切换中为所有CHO目标小区预先分配资源对系统资源的过多占用，可以提高系统的资源利用率，且降低UE的处理负担，提高用户的使用体验。
在一实施例中，CHO资源变更请求指示信息包括与UE的至少一个CHO目标小区相关的RRM测量结果，与UE的至少一个CHO目标小区相关的RRM测量结果用于使至少一个CHO目标基站确定是否变更至少一个CHO目标小区的资源和至少一个CHO目标小区的标识。与UE的至少一个CHO目标小区相关的RRM测量结果可以是UE测量上报给源基站的。源基站向至少一个CHO目标基站发送RRM测量结果后，接收到RRM测量结果的CHO目标基站可以根 据至少一个CHO目标小区的RRM测量结果，确定UE可能切换的CHO目标小区或者确定UE切换至各CHO目标小区的概率。例如若第一CHO目标小区的RRM测量结果较差，那么表示UE距离第一CHO目标小区的距离较远，或网络环境较差，即使UE切换至第一CHO目标小区，也不会有较好的网络环境，那么当第一CHO目标小区所属目标基站确定UE对第一CHO目标小区的RRM测量结果较差，小于预设阈值，则可以选择释放掉第一CHO目标小区的资源，避免UE切换至第一CHO目标小区。
另外，当对CHO目标小区的资源是否变更的决定是由CHO目标小区所属的CHO目标基站做出的，那么源基站在向UE发送CHO资源变更通知之前，还需要接收至少一个CHO目标基站发送的CHO资源变更请求反馈信息，CHO资源变更请求反馈信息包括至少一个CHO目标小区的资源是否变更和变更后的结果信息和至少一个CHO目标小区的标识。也就是只有接收到CHO资源变更请求指示信息的CHO目标基站准确地知道哪个CHO目标小区的资源进行了变更以及变更的结果。那么CHO目标基站需要向源基站发送CHO资源变更请求反馈信息，使得源基站获知至少一个CHO目标小区的资源是否变更以及变更的结果。然后源基站再向UE发送CHO资源变更通知。源基站发送的CHO资源变更请求指示信息还可以是需要被强制执行的，那么CHO目标基站就无需发送CHO资源变更请求反馈信息，也即若CHO资源变更请求指示信息是强制性的，则源基站不接收至少一个CHO目标基站发送的CHO资源变更请求反馈信息。需要反馈的CHO资源变更请求指示信息可以采用Class1类流程携带发送。而不需要反馈的CHO资源变更请求指示信息可以采用Class2类流程携带发送。
在一实施例中，CHO资源变更请求指示信息包括与UE的至少一个CHO目标小区相关的期望概率因子，期望概率因子用于表示源基站期望至少一个CHO目标小区变更资源的程度。与UE的至少一个CHO目标小区相关的期望概率因子是源基站根据UE的位置或者UE反馈的至少一种测量信息确定的。例如源基 站可以根据UE反馈的各种测量信息确定UE的位置和移动轨迹，从而可以预测UE切换至各CHO目标小区的概率，并以此确定各CHO目标小区相关的期望概率因子。或者源基站还可以根据UE反馈的各种测量信息，确定UE距离各CHO目标小区的距离或者切换至各CHO目标小区后的网络质量，并以此确定各CHO目标小区相关的期望概率因子。当CHO目标基站接收到CHO资源变更请求指示信息后，根据与各CHO目标小区相关的期望概率因子，确定是否对各CHO目标小区的资源进行变更。例如期望概率因子越低，表示UE切换的概率越低，若期望概率因子低于一定阈值，则可以释放期望概率因子低于一定阈值的CHO目标小区的资源。期望概率因子为100％时表示期望最高，期望概率因子为1％时表示期望最低。
图6为一实施例提供的另一种CHO资源处理方法的流程图，如图6所示，本实施例提供的方法包括如下步骤。
步骤S6010，UE的CHO目标基站接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理方法应用于移动通信系统中UE进行条件切换的CHO目标基站。而当前正在为UE提供服务的基站为源基站。UE通过源基站接入移动通信网络，源基站提供一个或多个小区，UE在一个时刻通过源基站提供的一个服务小区接入移动通信网络，UE所接入的服务小区称为主服务小区。当UE处于移动状态时，可能离开主服务小区的覆盖范围，到达其他服务小区，为了保证UE通信业务的连续性，需要执行切换流程。由于非条件切换的切换准备和切换完成流程在时间上时连续的，即当确定目标小区的资源满足切换需求时立即执行切换，不存在占用资源的问题，因此在本申请实施例中，仅对条件切换(CHO)的情况进行讨论，本申请实施例下述的切换均指条件切换。
如图3所示，当UE在一个基站所提供的多个服务小区间进行条件切换时， 由于多个服务小区都是由一个基站提供的，并没有额外的基站需要为UE预先配置通信资源，因此在图3所示的在一个基站所提供的多个服务小区间进行条件切换时，对工作效率和系统资源的占用的影响不大。而在图4所示的场景中，当UE接入的主服务小区附近存在多个其他基站提供的服务小区时，为了保证UE通信业务的连续性，在CHO机制中需要UE所处主服务小区附近的其他多个UE可能前往的服务小区的基站均为UE预先配置传输资源。而实际上UE仅会移动至一个服务小区并完成切换，其他并未切换至的服务小区所预留的传输资源将长时间被占用，这将占用较多的系统资源。
因此本实施例提供的CHO资源处理方法针对图4所示的CHO场景，也就是当UE潜在的CHO场景在多个基站所辖的服务小区间进行。UE的移动轨迹是连续的，因此UE在进行CHO时，必然从当前所处主服务小区切换至相邻的服务小区。但由于无法准确确定UE所要移动的方向，主服务小区相邻的小区都是UE潜在/候选的目标小区，而提供目标小区的基站成为CHO目标基站。各目标小区对应的目标基站均要为UE预先配置传输资源。但实际上，由于UE的移动轨迹在某些情况下是可以被预测的，例如处于匀速移动状态的UE大概率会朝向原有移动方向继续移动，极小概率会向当前移动方向相反的方向移动，因此UE切换至各CHO目标小区的概率是不同的，为切换概率极低的CHO目标小区预先配置的传输资源被使用的概率也极低，因此可以考虑提前释放掉这部分传输资源。或者UE的某些CHO目标小区中的负荷已经很重，若UE再切换至负荷严重的CHO目标小区，将影响小区中已接入其他UE的通信业务，或者将无法为待切换的UE提供满足需求的通信业务，此时也可以避免UE切换至负荷严重的CHO目标小区，提前释放掉这类小区为UE预先配置的传输资源。或者在其他的情况下，当UE的CHO目标小区不适合成为UE的目标小区时，都可以提前释放或取消该目标小区为UE预先配置的传输资源。
UE的源基站能够获取到UE的各种信息和参数，以及通过基站间的传输通 道获取其他基站的相关信息，因此UE的源基站能够获知UE的CHO目标小区是否适合切换。当UE的源基站确定UE的一个或多个CHO目标小区已经不适合成为UE的CHO目标小区时，UE的CHO目标基站会接收到UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源。UE的源基站确定的不适合成为UE的一个或多个CHO目标小区可能分别由一个或多个UE的CHO目标基站所提供，UE需要向每个确定的CHO目标小区所对应的CHO目标基站发送CHO资源变更请求指示信息。CHO资源变更请求指示信息，可以用于指示提供CHO目标小区的CHO目标基站释放CHO目标小区的资源，还可以用于指示提供CHO目标小区的CHO目标基站取消CHO目标小区的资源，或者还可以用于指示提供CHO目标小区的CHO目标基站修改CHO目标小区的资源。其中释放和取消CHO目标小区的资源都意味着该CHO目标小区已经不适合成为UE的CHO目标小区，在本申请下述各实施例中，仅以释放CHO目标小区的资源为例进行说明，取消CHO目标小区的资源的处理与释放CHO目标小区的资源的处理场景相同，处理流程类似。而修改CHO目标小区的资源，可以是增加或减少该CHO目标小区的资源，以便为UE提供更匹配的资源。
为了区分CHO资源变更请求指示信息所要求变更资源的CHO目标小区，CHO资源变更请求指示信息中可以包括用于区分CHO目标小区的标识，例如目标小区标识列表(Target Cell id List)，目标小区标识列表中包括确定需要变更资源我的CHO目标小区的小区标识。
在一实施例中，UE的CHO目标基站通过基站间的接口信令接收UE的源基站发送的CHO资源变更请求指示信息。该接口信令可以是Xn接口符合XnAP的接口信令。
步骤S6020，CHO目标基站变更CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
CHO目标基站接收到CHO资源变更请求指示信息后，可以直接根据CHO资源变更请求指示信息的指示，确定变更CHO资源变更请求指示信息中所指示的至少一个CHO目标小区的资源。CHO目标基站将响应于CHO资源变更请求指示信息，对至少一个CHO目标小区已分配的资源进行变更。
当CHO目标基站对至少一个CHO目标小区已分配的资源进行变更后，那么UE在移动发生了资源变更的CHO目标小区后，就可以根据发生了资源变更的CHO目标小区的传输资源，选择切换的目标小区。例如CHO资源变更请求指示信息指示第一CHO目标基站的第一CHO目标小区释放已分配的资源，那么即使UE移动至第一CHO目标小区的范围内，也不对第一CHO目标小区进行切换测量评估，这样既可以提前释放掉为第一CHO目标小区预先分配的资源，又减少了UE在进行CHO切换时的处理负担。若CHO资源变更请求指示信息指示第一CHO目标基站的第一CHO目标小区修改减少已分配的资源，那么当UE移动至第一CHO目标小区的范围内，对第一CHO目标小区和其他可切换的CHO目标小区进行切换测量评估，由于第一CHO目标小区的资源已被修改减少，UE将大概率地不会切换至第一CHO目标小区，这样可以优化CHO切换流程，使得UE进行CHO切换的目的小区可以根据各小区的资源使用情况进行修改，提高系统的资源利用率，并提高用户的使用体验。
本实施例提供的CHO资源处理方法，首先由UE的CHO目标基站接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源，然后CHO目标基站变更CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源，可以使系统资源被可控的利用，避免在CHO切换中为所有CHO目标小区预先分配资源对系统资源的过多占用，可以提高系统的资源利用率，且降低UE的处理负担，提高用户的使用体验。
在一实施例中，CHO资源变更请求指示信息包括与UE的至少一个CHO目 标小区相关的RRM测量结果和至少一个CHO目标小区的标识。CHO目标基站变更资源变更请求指示信息指示的至少一个CHO目标小区的资源，包括：CHO目标基站根据与UE的至少一个CHO目标小区相关的RRM测量结果，确定是否变更资源释放/取消请求指示信息指示的至少一个CHO目标小区的资源。与UE的至少一个CHO目标小区相关的RRM测量结果可以是UE测量上报给源基站的。源基站向至少一个CHO目标基站发送包括RRM测量结果的CHO资源变更请求指示信息后，接收到RRM测量结果的CHO目标基站可以根据至少一个CHO目标小区的RRM测量结果，确定UE可能切换的CHO目标小区或者确定UE切换至各CHO目标小区的概率。例如若第一CHO目标小区的RRM测量结果较差，那么表示UE距离第一CHO目标小区的距离较远，或网络环境较差，即使UE切换至第一CHO目标小区，也不会有较好的网络环境，那么当第一CHO目标小区所属目标基站确定UE对第一CHO目标小区的RRM测量结果较差，小于预设阈值，则可以选择释放掉第一CHO目标小区的资源，避免UE切换至第一CHO目标小区。
另外，当对CHO目标小区的资源是否变更的决定是由CHO目标小区所属的CHO目标基站做出的，那么UE的CHO目标基站接收UE的源基站发送的CHO资源变更请求指示信息之后。CHO目标基站还需要向源基站发送CHO资源变更请求反馈信息，CHO资源变更请求反馈信息包括至少一个CHO目标小区的资源是否变更和变更后的结果信息和至少一个CHO目标小区的标识。也就是只有接收到CHO资源变更请求指示信息的CHO目标基站准确地知道哪个CHO目标小区的资源进行了变更以及变更的结果。那么CHO目标基站需要向源基站发送CHO资源变更请求反馈信息，使得源基站获知至少一个CHO目标小区的资源是否变更以及变更的结果。然后源基站再向UE发送CHO资源变更通知。CHO目标基站接收的CHO资源变更请求指示信息还可以是需要被强制执行的，那么CHO目标基站就无需发送CHO资源变更请求反馈信息，即若CHO资源变更请求指示信息是强制性的，则CHO目标基站不向源基站发送CHO资 源变更请求反馈信息。需要反馈的CHO资源变更请求指示信息可以采用Class1类流程携带发送。而不需要反馈的CHO资源变更请求指示信息可以采用Class2类流程携带发送。
在一实施例中，CHO资源变更请求指示信息包括与UE的至少一个CHO目标小区相关的期望概率因子，期望概率因子用于表示源基站期望至少一个CHO目标小区变更资源的程度。与UE的至少一个CHO目标小区相关的期望概率因子是源基站根据UE的位置或者UE反馈的至少一种测量信息确定的。例如源基站可以根据UE反馈的各种测量信息确定UE的位置和移动轨迹，从而可以预测UE切换至各CHO目标小区的概率，并以此确定各CHO目标小区相关的期望概率因子。或者源基站还可以根据UE反馈的各种测量信息，确定UE距离各CHO目标小区的距离或者切换至各CHO目标小区后的网络质量，并以此确定各CHO目标小区相关的期望概率因子。当CHO目标基站接收到CHO资源变更请求指示信息后，根据与各CHO目标小区相关的期望概率因子，确定是否对各CHO目标小区的资源进行变更。例如期望概率因子越低，表示UE切换的概率越低，若期望概率因子低于一定阈值，则可以释放期望概率因子低于一定阈值的CHO目标小区的资源。期望概率因子为100％时表示期望最高，期望概率因子为1％时表示期望最低。
图7为一实施例提供的另一种CHO资源处理方法的流程图，如图7所示，本实施例提供的方法包括如下步骤。
步骤S7010，UE的源基站接收UE的CHO目标基站主动触发发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理方法应用于移动通信系统中为UE提供服务的源基站。其中源基站是指正在为UE提供服务的基站。UE通过源基站接入移动通信网络，源基站提供一个或多个小区，UE在一个时刻通过源基站提供的一 个服务小区接入移动通信网络，UE所接入的服务小区称为主服务小区。当UE处于移动状态时，可能离开主服务小区的覆盖范围，到达其他服务小区，为了保证UE通信业务的连续性，需要执行切换流程。由于非条件切换的切换准备和切换完成流程在时间上时连续的，即当确定目标小区的资源满足切换需求时立即执行切换，不存在占用资源的问题，因此在本申请实施例中，仅对条件切换(CHO)的情况进行讨论，本申请实施例下述的切换均指条件切换。
如图3所示，当UE在一个基站所提供的多个服务小区间进行条件切换时，由于多个服务小区都是由一个基站提供的，并没有额外的基站需要为UE预先配置通信资源，因此在图3所示的在一个基站所提供的多个服务小区间进行条件切换时，对工作效率和系统资源的占用的影响不大。而在图4所示的场景中，当UE接入的主服务小区附近存在多个其他基站提供的服务小区时，为了保证UE通信业务的连续性，在CHO机制中需要UE所处主服务小区附近的其他多个UE可能前往的服务小区的基站均为UE预先配置传输资源。而实际上UE仅会移动至一个服务小区并完成切换，其他并未切换至的服务小区所预留的传输资源将长时间被占用，这将占用较多的系统资源。
因此本实施例提供的CHO资源处理方法针对图4所示的CHO场景，也就是当UE潜在的CHO场景在多个基站所辖的服务小区间进行。在图5和图6所示实施例提供的CHO资源处理方法中，都是由源基站触发变更至少一个CHO目标小区的资源。而在本实施例中，是由CHO目标基站触发变更至少一个CHO目标小区的资源。那么对于UE的源基站，将接收UE的CHO目标基站发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。CHO目标基站根据自身的资源使用情况，或者根据其他可能的因素，确定需要对CHO目标基站所辖的至少一个CHO目标小区的资源进行变更。例如当第一CHO目标基站确定所辖第一CHO目标小区的负荷已经过大，因此第一CHO目标基站不希望第一 CHO目标小区再称为UE的CHO目标小区，那么第一CHO目标基站确定对第一CHO目标小区的资源进行释放。
为了使UE获知目标基站已经确定变更UE的至少一个CHO目标小区的资源，从而避免在已经释放资源的CHO目标小区进行接入流程，或者使用变更的资源接入CHO目标小区，源基站需要接收CHO目标基站发送的CHO资源变更通知指示信息。
CHO资源变更通知指示信息，可以用于通知源基站提供CHO目标小区的CHO目标基站释放CHO目标小区的资源，还可以用于通知源基站提供CHO目标小区的CHO目标基站取消CHO目标小区的资源，或者还可以用于通知源基站提供CHO目标小区的CHO目标基站修改CHO目标小区的资源。其中释放和取消CHO目标小区的资源都意味着该CHO目标小区已经不适合成为UE的CHO目标小区，在本申请下述各实施例中，仅以释放CHO目标小区的资源为例进行说明，取消CHO目标小区的资源的处理与释放CHO目标小区的资源的处理场景相同，处理流程类似。而修改CHO目标小区的资源，可以是增加或减少该CHO目标小区的资源，以便为UE提供更匹配的资源。
为了区分CHO资源变更通知指示信息所要求变更资源的CHO目标小区，CHO资源变更通知指示信息中可以包括用于区分CHO目标小区的标识，例如目标小区标识列表(Target Cell id List)，目标小区标识列表中包括确定需要变更资源我的CHO目标小区的小区标识。
在一实施例中，UE的源基站通过基站间的接口信令接收UE的CHO目标基站发送的CHO资源变更通知指示信息。该接口信令可以是Xn接口符合XnAP的接口信令。
步骤S7020，源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
在源基站接收到UE的CHO目标基站发送的CHO资源变更通知指示信息后，源基站还需要向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息，使得UE也获知至少一个CHO目标小区的资源发生了变更。那么UE在移动发生了资源变更的CHO目标小区后，就可以根据发生了资源变更的CHO目标小区的传输资源，选择切换的目标小区。例如CHO资源变更通知指示信息通知元机制第一CHO目标基站的第一CHO目标小区释放已分配的资源，那么源基站向UE发送的CHO资源变更通知中包括第一CHO目标小区的资源已被释放的信息，即使UE移动至第一CHO目标小区的范围内，也不对第一CHO目标小区进行切换测量评估，这样既可以提前释放掉为第一CHO目标小区预先分配的资源，又减少了UE在进行CHO切换时的处理负担。若CHO资源变更通知指示信息通知源基站第一CHO目标基站的第一CHO目标小区修改减少已分配的资源，那么源基站向UE发送的CHO资源变更通知中包括第一CHO目标小区的资源已被修改减少的信息，当UE移动至第一CHO目标小区的范围内，对第一CHO目标小区和其他可切换的CHO目标小区进行切换测量评估，由于第一CHO目标小区的资源已被修改减少，UE将大概率地不会切换至第一CHO目标小区，这样可以优化CHO切换流程，使得UE进行CHO切换的目的小区可以根据各小区的资源使用情况进行修改，提高系统的资源利用率，并提高用户的使用体验。
本实施例提供的CHO资源处理方法，首先由UE的源基站接收UE的CHO目标基站发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源，然后源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息，可以使系统资源被可控的利用，避免在CHO切换中为所有CHO目标小区预先分配资源对系统资源的过多占用，可以提高系统的资源利用率，且降低UE的处理负担，提高用户的使用体验。
在一实施例中，CHO资源变更通知指示信息包括变更至少一个CHO目标小区的资源的原因和至少一个CHO目标小区的标识。变更至少一个CHO目标小区的资源的原因例如包括负荷过重或者出现故障等情况。源基站在接收到CHO资源变更通知指示信息后，将获知变更至少一个CHO目标小区的资源的原因，从而可以辅助源基站进行参考。
另外，当UE的源基站接收UE的CHO目标基站发送的CHO资源变更通知指示信息之后，源基站还可以向CHO目标基站发送CHO资源变更通知反馈信息，CHO资源变更通知反馈信息包括源基站确认至少一个CHO目标小区的资源变更的信息。也就是源基站在接收到CHO资源变更通知指示信息之后，可以通知CHO目标基站源基站已经获知至少一个CHO目标小区的资源变更的信息，此时CHO目标基站可以对至少一个CHO目标小区的资源完成变更。而若CHO目标基站在未接收到源基站发送的CHO资源变更通知反馈信息就对至少一个CHO目标小区的资源进行变更，则可能导致UE并未获知至少一个CHO目标小区的资源进行变更而导致UE仍然接入资源已变更的CHO目标小区而导致的接入失败。CHO目标基站发送的CHO资源变更通知指示信息还可以是需要被强制执行的，那么源基站也可以不发送CHO资源变更通知反馈信息。需要反馈的CHO资源变更通知指示信息可以采用Class1类流程携带发送。而不需要反馈的CHO资源变更通知指示信息可以采用Class2类流程携带发送。
在一实施例中，CHO资源变更通知指示信息包括与至少一个CHO目标小区相关的预配置期望概率因子，预配置期望概率因子用于表示至少一个CHO目标小区期望再次被CHO预配置资源的程度。与至少一个CHO目标小区相关的预配置期望概率因子是CHO目标基站根据至少一个CHO目标小区的状态确定的，在对至少一个CHO目标小区的资源进行变更后，当至少一个CHO目标小区的状态恢复正常，CHO目标基站即可期望恢复正常的CHO目标小区重新作为UE的正常的CHO目标小区。而预配置期望概率因子就是表征至少一个CHO 目标小区期望再次被CHO预配置资源的程度，预配置期望概率因子越高，表示至少一个CHO目标小区期望再次被CHO预配置资源的程度越高，反之亦然。预配置期望概率因子为100％时表示期望最高，预配置期望概率因子为1％时表示期望最低。
在一实施例中，UE的源基站接收UE的CHO目标基站发送的CHO资源变更通知指示信息之前，还包括：源基站向CHO目标基站发送CHO资源变更许可指示信息，CHO资源变更许可指示信息用于许可CHO目标基站主动触发变更至少一个CHO目标小区的资源。由于UE当前接入的是源小区，因此对UE所使用的传输资源的处理本应由源基站进行触发，而在图7所示实施例中，是由UE的CHO目标基站触发变更UE的至少一个CHO目标小区的资源，这可能导致源基站和CHO目标基站产生冲突。因此，源基站可以首先向CHO目标基站发送CHO资源变更许可指示信息，然后CHO目标基站再主动触发CHO目标小区的资源变更并向源基站发送CHO资源变更通知指示信息。
图8为一实施例提供的另一种CHO资源处理方法的流程图，如图8所示，本实施例提供的方法包括如下步骤。
步骤S8010，UE的CHO目标基站确定变更为UE配置的至少一个CHO目标小区的资源。
步骤S8020，CHO目标基站主动触发向UE的源基站发送CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理方法应用于移动通信系统中UE进行条件切换的CHO目标基站。本实施例所提供的CHO资源处理方法是图7所示实施例中CHO目标基站一侧的处理流程，其实现原理和技术效果与图7所示实施例类似。而由CHO目标基站作为执行主体进行资源处理的方法也在图6所示实施例中进行了说明，因此本领域技术人员可以结合图7和图6所示实施例，获知本 实施例的具体实施过程，此处将不再赘述。
在一实施例中，在图8所示实施例的基础上，CHO资源变更通知指示信息包括变更至少一个CHO目标小区的资源的原因和至少一个CHO目标小区的标识。
在一实施例中，在图8所示实施例的基础上，CHO资源变更通知指示信息包括与至少一个CHO目标小区相关的预配置期望概率因子，预配置期望概率因子用于表示至少一个CHO目标小区期望再次被CHO预配置资源的程度。
在一实施例中，在图8所示实施例的基础上，CHO目标基站向UE的与源基站发送CHO资源变更通知指示信息之后，还包括：
CHO目标基站接收源基站发送的CHO资源变更通知反馈信息，CHO资源变更通知反馈信息包括源基站确认至少一个CHO目标小区的资源变更的结果信息。
在一实施例中，在图8所示实施例的基础上，CHO目标基站向UE的与源基站发送CHO资源变更通知指示信息之前，还包括：CHO目标基站接收源基站发送的CHO资源变更许可指示信息，CHO资源变更许可指示信息用于许可CHO目标基站主动触发变更至少一个CHO目标小区的资源。
在一实施例中，在图8所示实施例的基础上，CHO目标基站向UE的与源基站发送CHO资源变更通知指示信息，包括：CHO目标基站通过基站间的接口信令向UE的与源基站发送CHO资源变更通知指示信息。
在一实施例中，在图8所示实施例的基础上，CHO资源变更通知指示信息，包括CHO资源释放通知指示信息、CHO资源取消通知指示信息、CHO资源修改通知指示信息中的至少一种。
下面以几个具体的实施例对本申请实施例提供的CHO资源处理方法进行详细说明。
在一实施例中，某UE已处于CHO操作中，某目标基站(Target Node)(gNB或ng-eNB)中已为该UE CHO预配置了两个目标小区Cell3和Cell4。随着UE移动而远离Cell4，它不太可能再成为UE的目标小区，因此源基站(Source Node)(gNB或ng-eNB)决定释放/取消掉Cell4(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Source Node发送XnAP：切换取消(Handover Cancel)消息，它包含了请求Target Node释放/取消掉Cell4的指示信息。步骤2：Target Node总是服从该释放/取消请求，于是释放/取消掉Cell4相关的CHO预配置资源。步骤3：Source Node通过空口RRC重配置流程消息通知UE：Cell4已被释放/取消，无需再对它进行CHO评估或切换尝试。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了三个目标小区Cell3，Cell4和Cell5。随着UE移动而远离Cell3和Cell4，它们不太可能再成为UE的目标小区，因此源基站Source Node(gNB或ng-eNB)决定释放/取消掉Cell3和Cell4(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Source Node发送XnAP：切换请求(Handover Request)消息，它包含了请求Target Node释放/取消掉Cell3和Cell4的指示信息，并且附带Cell3和Cell4各自当前最新的RRM测量结果。步骤2：Target Node根据Cell3和Cell4各自当前最新的RRM测量结果，决定仍然保留Cell3，但立即释放/取消掉Cell4，于是仅仅释放/取消掉Cell4相关的CHO预配置资源。步骤3：Target Node需要回复XnAP：切换请求反馈(Handover Request Acknowledge)消息给Source Node，它包含了Cell3最新的CHO预配置信息，和成功释放/取消掉Cell4的结果信息。步骤4：Source Node通过空口RRC重配置流程消息通知UE：Cell3没被释放/取消但CHO预配置有更新；Cell4已被释放/取消，无需再对它进行CHO评估或切换尝试。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了三个目标小区Cell3，Cell4和Cell5。随着UE移动而远离Cell4，它不太可能再成为UE的目标小区，因此源基站Source  Node(gNB或ng-eNB)决定释放/取消掉Cell4(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Source Node发送XnAP：切换请求(Handover Request)消息，它包含了请求Target Node释放/取消掉Cell4的指示信息，并且附带和Cell4相关的期待概率因子50％。步骤2：Target Node根据源基站发来的释放/取消期待概率因子50％，决定仍然保留Cell4，但重配Cell4的CHO预配置资源。步骤3：Target Node需要回复XnAP：切换请求反馈(Handover Request Acknowledge)消息给Source Node，它包含了Cell4最新的CHO预配置信息。步骤4：Source Node通过空口RRC重配置流程消息通知UE：Cell4没被释放/取消但它的CHO预配置有更新。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了四个目标小区Cell2，Cell3，Cell4和Cell5。随着UE移动而远离Cell3/4/5，它们不太可能再成为UE的目标小区，因此源基站Source Node(gNB或ng-eNB)决定释放/取消掉Cell3/4/5(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Source Node发送XnAP：切换取消(Handover Cancel)消息，它包含了请求Target Node同时释放/取消掉Cell3/4/5的指示信息。步骤2：Target Node总是服从该释放/取消请求，于是释放/取消掉Cell3/4/5相关的CHO预配置资源。步骤3：Source Node通过空口RRC重配置流程消息通知UE：Cell3/4/5已被释放/取消，无需再对它们进行CHO评估或切换尝试。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了四个目标小区Cell2，Cell3，Cell4和Cell5。随着Cell4/5小区本地负荷的增加，目标基站不希望它们再成为UE的目标小区，因此目标基站Target Node(gNB或ng-eNB)决定主动释放/取消掉Cell4/5(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Target Node发送XnAP：切换取消(Handover Cancel)消息，它包含了目标基站主动同时释放/取消掉Cell4/5的指示信息。步骤2：Source Node总是服从该释放/取消指示， 于是得知：目标基站主动释放/取消掉Cell4/5相关的CHO预配置资源。步骤3：Source Node通过空口RRC重配置流程消息通知UE：Cell4/5已被释放/取消，无需再对它们进行CHO评估或切换尝试。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了三个目标小区Cell2，Cell3，和Cell4。随着Cell3/4小区本地负荷或其它RRM策略的变化，目标基站希望改变和Cell3相关的CHO预配置信息，同时不希望Cell4再成为UE的目标小区，因此目标基站Target Node(gNB或ng-eNB)决定主动修改Cell3和释放/取消掉Cell4(减轻UE的CHO评估负担，和CHO资源无为的预留占用)。步骤1：Target Node发送XnAP：CHO修改请求(CHO Modification Required)消息，它包含了目标基站主动修改后的和Cell3最新相关的CHO预配置信息，同时释放/取消掉Cell4的指示信息。步骤2：Source Node总是服从该目标小区修改和释放/取消的指示，于是得知：目标基站主动修改了和Cell3相关的CHO预配置信息，同时释放/取消掉Cell4相关的CHO预配置资源。步骤3：Source Node向Target Node回复发送XnAP：CHO修改确认(CHO Modification Confirm)消息，以确认上述目标小区的修改和释放/取消操作。步骤4：Source Node通过空口RRC重配置流程消息通知UE：修改后的和Cell3最新相关的CHO预配置信息，并且Cell4已被释放/取消，无需再对它进行CHO评估或切换尝试。
在一实施例中，某UE已处于CHO操作中，某目标基站Target Node(gNB或ng-eNB)中已为该UE CHO预配置了三个目标小区Cell2，Cell3，Cell4。步骤1：Source Node发送XnAP：切换请求(Handover Request)消息，它包含了“是否允许目标基站发起CHO资源释放/取消的开关使能指示”＝“禁止”，表示不允许后续目标基站主动发起CHO资源释放/取消。步骤2：Target Node回复XnAP：切换请求反馈(Handover Request Acknowledge)消息，总是服从上述指示，于是后续不主动发起和目标小区Cell2，Cell3，Cell4相关的CHO资源释放/取消。
图9为一实施例提供的一种CHO资源处理装置的结构示意图，如图9所示，本实施例提供的CHO资源处理装置包括：
第一发送模块91，设置为向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；第二发送模块92，设置为向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本实施例提供的CHO资源处理装置用于实现图5所示实施例的CHO资源处理方法，本实施例提供的CHO资源处理装置实现原理和技术效果类似，此处不再赘述。
图10为一实施例提供的另一种CHO资源处理装置的结构示意图，如图10所示，本实施例提供的CHO资源处理装置包括：
第一接收模块101，设置为接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；资源变更模块102，设置为变更CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理装置用于实现图6所示实施例的CHO资源处理方法，本实施例提供的CHO资源处理装置实现原理和技术效果类似，此处不再赘述。
图11为一实施例提供的另一种CHO资源处理装置的结构示意图，如图11所示，本实施例提供的CHO资源处理装置包括：
第二接收模块111，设置为接收UE的CHO目标基站发送的CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源；第三发送模块112，设置为向 UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本实施例提供的CHO资源处理装置用于实现图7所示实施例的CHO资源处理方法，本实施例提供的CHO资源处理装置实现原理和技术效果类似，此处不再赘述。
图12为一实施例提供的一种CHO资源处理装置的结构示意图，如图12所示，本实施例提供的CHO资源处理装置包括：
资源确定模块121，设置为确定变更为UE配置的至少一个CHO目标小区的资源；第四发送模块122，设置为主动触发向UE的源基站发送CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
本实施例提供的CHO资源处理装置用于实现图8所示实施例的CHO资源处理方法，本实施例提供的CHO资源处理装置实现原理和技术效果类似，此处不再赘述。
图13为一实施例提供的一种CHO资源处理系统的结构示意图，如图13所示，本实施例提供的CHO资源处理系统包括：源基站131和多个CHO目标基站132。其中源基站131包括如图9所示的CHO资源处理装置，CHO目标基站132包括如图10所示的CHO资源处理装置。或者源基站131包括如图11所示的CHO资源处理装置，CHO目标基站132包括如图12所示的CHO资源处理装置。在图13中以CHO资源处理系统包括3个CHO目标基站132为例进行说明，但实际上，CHO目标基站132的个数为至少一个即可。
图14为一实施例提供的一种源基站的结构示意图，如图14所示，该源基站包括处理器141、存储器142、发送器143和接收器144；源基站中处理器141的数量可以是一个或多个，图14中以一个处理器141为例；源基站中的处理器141和存储器142、发送器143和接收器144；可以通过总线或其他方式连接， 图14中以通过总线连接为例。
存储器142作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请图5或图7实施例中的CHO资源处理方法对应的程序指令/模块(例如，CHO资源装置中的第一发送模块91和第二发送模块92或者CHO资源装置中的第二接收模块111和第三发送模块112)。处理器141通过运行存储在存储器142中的软件程序、指令以及模块，从而源基站至少一种功能应用以及数据处理，即实现上述的CHO资源处理方法。
存储器142可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器142可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器143为能够将射频信号发射至空间中的模块或器件组合，例如包括射频发射机、天线以及其他器件的组合。接收器144为能够从空间中接收将射频信号的模块或器件组合，例如包括射频接收机、天线以及其他器件的组合。
图15为一实施例提供的一种CHO目标基站的结构示意图，如图15所示，该CHO目标基站包括处理器151、存储器152、发送器153和接收器154；CHO目标基站中处理器151的数量可以是一个或多个，图15中以一个处理器151为例；CHO目标基站中的处理器151和存储器152、发送器153和接收器154；可以通过总线或其他方式连接，图15中以通过总线连接为例。
存储器152作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请图6或图8实施例中的CHO资源处理方法对应的程序指令/模块(例如，CHO资源装置中的第一接收模块101和资源变更模块102或者CHO资源装置中的资源确定模块121和第四发送模块122)。处理器151通过运行存储在存储器152中的软件程序、指令以及模块，从而CHO目 标基站至少一种功能应用以及数据处理，即实现上述的CHO资源处理方法。
存储器152可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器152可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器153为能够将射频信号发射至空间中的模块或器件组合，例如包括射频发射机、天线以及其他器件的组合。接收器154为能够从空间中接收将射频信号的模块或器件组合，例如包括射频接收机、天线以及其他器件的组合。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种CHO资源处理方法，该方法包括：UE的源基站向UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种CHO资源处理方法，该方法包括：UE的CHO目标基站接收UE的源基站发送的CHO资源变更请求指示信息，CHO资源变更请求指示信息用于指示至少一个CHO目标基站变更UE的至少一个CHO目标小区的资源；CHO目标基站变更资源变更请求指示信息指示的至少一个CHO目标小区的资源。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种CHO资源处理方法，该方法包括：UE的源基站接收UE的CHO目标基站主动触发发送的CHO资源变更通知指示 信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源；源基站向UE发送CHO资源变更通知，CHO资源变更通知包括至少一个CHO目标小区的资源被变更的信息和至少一个CHO目标小区的标识。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种CHO资源处理方法，该方法包括：UE的CHO目标基站确定变更为UE配置的至少一个CHO目标小区的资源；CHO目标基站主动触发向UE的源基站发送CHO资源变更通知指示信息，CHO资源变更通知指示信息用于通知源基站CHO目标基站已确定变更UE的至少一个CHO目标小区的资源。
以上所述，仅为本申请的示例性实施例而已，并非用于限定本申请的保护范围。
本领域内的技术人员应明白，术语用户终端涵盖任何适合类型的无线用户设备，例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和 功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(Read-Only Memory，ROM)、随机访问存储器(Random Access Memory，RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disc，CD)等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field-Programmable Gate Array，FGPA)以及基于多核处理器架构的处理器。

Claims (34)

  1. 一种条件切换CHO资源处理方法，包括：
    用户设备UE的源基站向所述UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，所述CHO资源变更请求指示信息用于指示所述至少一个CHO目标基站变更所述UE的至少一个CHO目标小区的资源；
    所述源基站向所述UE发送CHO资源变更通知，所述CHO资源变更通知包括所述至少一个CHO目标小区的资源被变更的信息和所述至少一个CHO目标小区的标识。
  2. 根据权利要求1所述的方法，其中，所述CHO资源变更请求指示信息包括与所述UE的至少一个CHO目标小区相关的无线资源管理RRM测量结果和所述至少一个CHO目标小区的标识，所述与所述UE的至少一个CHO目标小区相关的RRM测量结果用于使所述至少一个CHO目标基站确定是否变更所述至少一个CHO目标小区的资源；
    所述UE的源基站向所述UE的至少一个CHO目标基站发送CHO资源变更请求指示信息之前，还包括：
    所述源基站接收所述UE发送的与所述UE的至少一个CHO目标小区相关的RRM测量结果。
  3. 根据权利要求1所述的方法，其中，所述CHO资源变更请求指示信息包括与所述UE的至少一个CHO目标小区相关的期望概率因子，所述期望概率因子用于表示所述源基站期望所述至少一个CHO目标小区变更资源的程度。
  4. 根据权利要求1～3任一项所述的方法，所述源基站向所述UE发送CHO资源变更通知之前，还包括：
    所述源基站接收所述至少一个CHO目标基站发送的CHO资源变更请求反馈信息，所述CHO资源变更请求反馈信息包括所述至少一个CHO目标小区的资源是否变更和变更后的结果信息和所述至少一个CHO目标小区的标识；
    所述源基站向所述UE发送CHO资源变更通知，包括：
    所述源基站向所述UE发送所述CHO资源变更通知，所述CHO资源变更 通知包括所述CHO资源变更请求反馈信息为确认变更资源的至少一个CHO目标小区的资源被变更的信息和所述确认变更资源的至少一个CHO目标小区的标识。
  5. 根据权利要求1～3任一项所述的方法，所述UE的源基站向所述UE的至少一个CHO目标基站发送CHO资源变更请求指示信息之后，还包括：
    在所述CHO资源变更请求指示信息是强制性的情况下，所述源基站不接收所述至少一个CHO目标基站发送的CHO资源变更请求反馈信息。
  6. 根据权利要求1～3任一项所述的方法，其中，所述UE的源基站向所述UE的至少一个CHO目标基站发送CHO资源变更请求指示信息，包括：
    所述UE的源基站通过基站间的接口信令向所述UE的至少一个CHO目标基站发送所述CHO资源变更请求指示信息。
  7. 根据权利要求1～3任一项所述的方法，其中，所述CHO资源变更请求指示信息，包括CHO资源释放请求指示信息、CHO资源取消请求指示信息以及CHO资源修改请求指示信息中的至少一种。
  8. 一种CHO资源处理方法，包括：
    用户设备UE的条件切换CHO目标基站接收所述UE的源基站发送的CHO资源变更请求指示信息，所述CHO资源变更请求指示信息用于指示所述至少一个CHO目标基站变更所述UE的至少一个CHO目标小区的资源；
    所述CHO目标基站变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
  9. 根据权利要求8所述的方法，其中，所述CHO资源变更请求指示信息包括与所述UE的至少一个CHO目标小区相关的无线资源管理RRM测量结果和所述至少一个CHO目标小区的标识；
    所述CHO目标基站变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源，包括：
    所述CHO目标基站根据与所述UE的至少一个CHO目标小区相关的RRM 测量结果，确定是否变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
  10. 根据权利要求8所述的方法，其中，所述CHO资源变更请求指示信息包括与所述UE的至少一个CHO目标小区相关的期望概率因子，所述期望概率因子用于表示所述源基站期望所述至少一个CHO目标小区变更资源的程度；
    所述CHO目标基站变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源，包括：
    所述CHO目标基站根据与所述UE的至少一个CHO目标小区相关的期望概率因子，确定是否变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
  11. 根据权利要求8～10任一项所述的方法，所述UE的CHO目标基站接收所述UE的源基站发送的CHO资源变更请求指示信息之后，还包括：
    所述CHO目标基站向所述源基站发送CHO资源变更请求反馈信息，所述CHO资源变更请求反馈信息包括所述至少一个CHO目标小区的资源是否变更和变更后的结果信息和所述至少一个CHO目标小区的标识。
  12. 根据权利要求8～10任一项所述的方法，所述UE的CHO目标基站接收所述UE的源基站发送的CHO资源变更请求指示信息之后，还包括：
    在所述CHO资源变更请求指示信息是强制性的情况下，所述CHO目标基站不向所述源基站发送CHO资源变更请求反馈信息。
  13. 根据权利要求8～10任一项所述的方法，其中，所述UE的CHO目标基站接收所述UE的源基站发送的CHO资源变更请求指示信息，包括：
    所述UE的CHO目标基站通过基站间的接口信令接收所述UE的源基站发送的CHO资源变更请求指示信息。
  14. 根据权利要求8～10任一项所述的方法，其中，所述CHO资源变更请求指示信息，包括CHO资源释放请求指示信息、CHO资源取消请求指示信息以及CHO资源修改请求指示信息中的至少一种。
  15. 一种CHO资源处理方法，包括：
    用户设备UE的源基站接收所述UE的条件切换CHO目标基站主动触发发送的CHO资源变更通知指示信息，所述CHO资源变更通知指示信息用于通知所述源基站所述CHO目标基站已确定变更所述UE的至少一个CHO目标小区的资源；
    所述源基站向所述UE发送CHO资源变更通知，所述CHO资源变更通知包括所述至少一个CHO目标小区的资源被变更的信息和所述至少一个CHO目标小区的标识。
  16. 根据权利要求15所述的方法，其中，所述CHO资源变更通知指示信息包括变更所述至少一个CHO目标小区的资源的原因和所述至少一个CHO目标小区的标识。
  17. 根据权利要求15所述的方法，其中，所述CHO资源变更通知指示信息包括与所述至少一个CHO目标小区相关的预配置期望概率因子，所述预配置期望概率因子用于表示所述至少一个CHO目标小区期望再次被CHO预配置资源的程度。
  18. 根据权利要求15～17任一项所述的方法，所述UE的源基站接收所述UE的CHO目标基站发送的CHO资源变更通知指示信息之后，还包括：
    所述源基站向所述CHO目标基站发送CHO资源变更通知反馈信息，所述CHO资源变更通知反馈信息包括所述源基站确认所述至少一个CHO目标小区的资源变更的信息和所述至少一个CHO目标小区的标识。
  19. 根据权利要求15～17任一项所述的方法，所述UE的源基站接收所述UE的CHO目标基站发送的CHO资源变更通知指示信息之前，还包括：
    所述源基站向所述CHO目标基站发送CHO资源变更许可指示信息，所述CHO资源变更许可指示信息用于许可所述CHO目标基站是否能够主动触发变更所述至少一个CHO目标小区的资源。
  20. 根据权利要求15～17任一项所述的方法，其中，所述UE的源基站接收 所述UE的CHO目标基站发送的CHO资源变更通知指示信息，包括：
    所述UE的源基站通过基站间的接口信令接收所述UE的CHO目标基站发送的CHO资源变更通知指示信息。
  21. 根据权利要求15～17任一项所述的方法，其中，所述CHO资源变更通知指示信息，包括CHO资源释放通知指示信息、CHO资源取消通知指示信息、CHO资源修改通知指示信息中的至少一种。
  22. 一种CHO资源处理方法，包括：
    用户设备UE的条件切换CHO目标基站确定变更为所述UE配置的至少一个CHO目标小区的资源；
    所述CHO目标基站主动触发向所述UE的源基站发送CHO资源变更通知指示信息，所述CHO资源变更通知指示信息用于通知所述源基站所述CHO目标基站已确定变更所述UE的至少一个CHO目标小区的资源。
  23. 根据权利要求22所述的方法，其中，所述CHO资源变更通知指示信息包括变更所述至少一个CHO目标小区的资源的原因和所述至少一个CHO目标小区的标识。
  24. 根据权利要求22所述的方法，其中，所述CHO资源变更通知指示信息包括与所述至少一个CHO目标小区相关的预配置期望概率因子，所述预配置期望概率因子用于表示所述至少一个CHO目标小区期望再次被CHO预配置资源的程度。
  25. 根据权利要求22～24任一项所述的方法，所述CHO目标基站主动触发向所述UE的源基站发送CHO资源变更通知指示信息之后，还包括：
    所述CHO目标基站接收所述源基站发送的CHO资源变更通知反馈信息，所述CHO资源变更通知反馈信息包括所述源基站确认所述至少一个CHO目标小区的资源变更的信息和所述至少一个CHO目标小区的标识。
  26. 根据权利要求22～24任一项所述的方法，所述CHO目标基站主动触发向所述UE的源基站发送CHO资源变更通知指示信息之前，还包括：
    所述CHO目标基站接收所述源基站发送的CHO资源变更许可指示信息，所述CHO资源变更许可指示信息用于许可所述CHO目标基站是否能够主动触发变更所述至少一个CHO目标小区的资源。
  27. 根据权利要求22～24任一项所述的方法，其中，所述CHO目标基站主动触发向所述UE的源基站发送CHO资源变更通知指示信息，包括：
    所述CHO目标基站通过基站间的接口信令向所述UE的源基站发送CHO资源变更通知指示信息。
  28. 根据权利要求22～24任一项所述的方法，其中，所述CHO资源变更通知指示信息，包括CHO资源释放通知指示信息、CHO资源取消通知指示信息、CHO资源修改通知指示信息中的至少一种。
  29. 一种CHO资源处理装置，包括：
    第一发送模块，设置为向所述UE的至少一个条件切换CHO目标基站发送CHO资源变更请求指示信息，所述CHO资源变更请求指示信息用于指示所述至少一个CHO目标基站变更所述UE的至少一个CHO目标小区的资源；
    第二发送模块，设置为向所述UE发送CHO资源变更通知，所述CHO资源变更通知包括所述至少一个CHO目标小区的资源被变更的信息和所述至少一个CHO目标小区的标识。
  30. 一种CHO资源处理装置，包括：
    第一接收模块，设置为接收所述UE的源基站发送的CHO资源变更请求指示信息，所述CHO资源变更请求指示信息用于指示所述至少一个CHO目标基站变更所述UE的至少一个CHO目标小区的资源；
    资源变更模块，设置为变更所述CHO资源变更请求指示信息指示的至少一个CHO目标小区的资源。
  31. 一种CHO资源处理装置，包括：
    第二接收模块，设置为接收所述UE的条件切换CHO目标基站发送的CHO资源变更通知指示信息，所述CHO资源变更通知指示信息用于通知所述源基站 所述CHO目标基站已确定变更所述UE的至少一个CHO目标小区的资源；
    第三发送模块，设置为向所述UE发送CHO资源变更通知，所述CHO资源变更通知包括所述至少一个CHO目标小区的资源被变更的信息和所述至少一个CHO目标小区的标识。
  32. 一种CHO资源处理装置，包括：
    资源确定模块，设置为确定变更为所述UE配置的至少一个CHO目标小区的资源；
    第四发送模块，设置为主动触发向所述UE的源基站发送CHO资源变更通知指示信息，所述CHO资源变更通知指示信息用于通知所述源基站所述CHO目标基站已确定变更所述UE的至少一个CHO目标小区的资源。
  33. 一种CHO资源处理系统，包括源基站和至少一个目标基站；
    所述源基站包括如权利要求29所述的CHO资源处理装置；
    所述至少一个目标基站包括如权利要求30所述的CHO资源处理装置。
  34. 一种CHO资源处理系统，包括源基站和至少一个目标基站；
    所述源基站包括如权利要求31所述的CHO资源处理装置；
    所述至少一个目标基站包括如权利要求32所述的CHO资源处理装置。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114205881A (zh) * 2021-12-31 2022-03-18 中国信息通信研究院 一种基站间切换方法和设备
WO2022228692A1 (en) * 2021-04-30 2022-11-03 Telefonaktiebolaget Lm Ericsson (Publ) Methods, apparatuses and systems for use in a handover in a wireless communication network

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020197459A1 (en) * 2019-03-28 2020-10-01 Telefonaktiebolaget Lm Ericsson (Publ) Conditional handover execution probability information to potential target node
CN110536365B (zh) * 2019-07-29 2023-09-12 中兴通讯股份有限公司 Cho资源处理方法、装置和系统
CN113141667B (zh) * 2020-01-17 2023-05-09 中国移动通信有限公司研究院 随机接入方法、信息处理方法、装置、终端及网络侧设备
US11770751B2 (en) * 2020-01-31 2023-09-26 Nokia Solutions And Networks Oy Signaling for target-initiated conditional handover modification via cancellation
CN115244985A (zh) * 2020-04-09 2022-10-25 中兴通讯股份有限公司 用于移动性增强的系统和方法
WO2022038067A1 (en) * 2020-08-17 2022-02-24 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for managing conditional handover of a user equipment
CN116326046A (zh) * 2020-10-22 2023-06-23 华为技术有限公司 一种通信方法及装置
US20240179604A1 (en) * 2021-04-01 2024-05-30 Lenovo (Beijing) Limited Method and apparatus for conditional handover in network
WO2023117052A1 (en) * 2021-12-21 2023-06-29 Nokia Technologies Oy Ue positioning/location assisted conditional handover
CN117998483A (zh) * 2022-11-03 2024-05-07 大唐移动通信设备有限公司 候选小区的切换方法和装置
CN116390181B (zh) * 2023-06-07 2023-09-15 武汉世炬信息技术有限公司 用户终端切换通信小区的切换方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018175819A1 (en) * 2017-03-23 2018-09-27 Intel IP Corporation Enhanced conditional handover
CN108632875A (zh) * 2017-03-22 2018-10-09 北京展讯高科通信技术有限公司 小区切换方法、装置及用户设备
WO2018203716A1 (ko) * 2017-05-04 2018-11-08 삼성전자 주식회사 단말 자율 핸드오버에서의 측정 리포트 이벤트 운용 및 네트워크 시그널링 방법
CN110536365A (zh) * 2019-07-29 2019-12-03 中兴通讯股份有限公司 Cho资源处理方法、装置和系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110149663A (zh) * 2018-02-13 2019-08-20 维沃移动通信有限公司 条件切换取消方法及通信设备
CN114175731B (zh) * 2019-06-28 2024-04-26 三星电子株式会社 在无线通信系统中进行切换的装置和方法
US20200413312A1 (en) * 2019-09-24 2020-12-31 Jaemin HAN Network signalling conditional handover
US11770751B2 (en) * 2020-01-31 2023-09-26 Nokia Solutions And Networks Oy Signaling for target-initiated conditional handover modification via cancellation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108632875A (zh) * 2017-03-22 2018-10-09 北京展讯高科通信技术有限公司 小区切换方法、装置及用户设备
WO2018175819A1 (en) * 2017-03-23 2018-09-27 Intel IP Corporation Enhanced conditional handover
WO2018203716A1 (ko) * 2017-05-04 2018-11-08 삼성전자 주식회사 단말 자율 핸드오버에서의 측정 리포트 이벤트 운용 및 네트워크 시그널링 방법
CN110536365A (zh) * 2019-07-29 2019-12-03 中兴通讯股份有限公司 Cho资源处理方法、装置和系统

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Configuration of Conditional handover in LTE", 3GPP DRAFT; R2-1906195 - CONFIGURATION OF CONDITIONAL HANDOVER IN LTE, vol. RAN WG2, 2 May 2019 (2019-05-02), Reno, US, pages 1 - 5, XP051710520 *
ERICSSON: "On Validity Timer for Conditional Handover in LTE", 3GPP DRAFT; R2-1906201 - ON VALIDITY TIMER FOR CONDITIONAL HANDOVER IN LTE, vol. RAN WG2, 2 May 2019 (2019-05-02), Reno, USA, pages 1 - 9, XP051710525 *
QUALCOMM INCORPORATED: "LTE Conditional HO design considerations", 3GPP DRAFT; R2-1906375_LTE CONDITIONAL HANDOVER DESIGN CONSIDERATIONS_V1, vol. RAN WG2, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 8, XP051710690 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022228692A1 (en) * 2021-04-30 2022-11-03 Telefonaktiebolaget Lm Ericsson (Publ) Methods, apparatuses and systems for use in a handover in a wireless communication network
CN114205881A (zh) * 2021-12-31 2022-03-18 中国信息通信研究院 一种基站间切换方法和设备
CN114205881B (zh) * 2021-12-31 2024-02-09 中国信息通信研究院 一种基站间切换方法和设备

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