WO2022037427A1 - 一种移动性管理方法和装置 - Google Patents

一种移动性管理方法和装置 Download PDF

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Publication number
WO2022037427A1
WO2022037427A1 PCT/CN2021/111387 CN2021111387W WO2022037427A1 WO 2022037427 A1 WO2022037427 A1 WO 2022037427A1 CN 2021111387 W CN2021111387 W CN 2021111387W WO 2022037427 A1 WO2022037427 A1 WO 2022037427A1
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WIPO (PCT)
Prior art keywords
message
network device
target cell
terminal device
information
Prior art date
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PCT/CN2021/111387
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English (en)
French (fr)
Inventor
曹龙雨
于益俊
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21857522.3A priority Critical patent/EP4192104A4/en
Publication of WO2022037427A1 publication Critical patent/WO2022037427A1/zh
Priority to US18/170,628 priority patent/US20230209450A1/en

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    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/087—Reselecting an access point between radio units of access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the present application relates to the field of communications, and more particularly, to a mobility management method and apparatus.
  • gNB-CU-CP can realize radio resource control (radio resource control, RRC) and packet data convergence protocol control plane (packet data convergence protocol-control plane, PDCP-C) protocol
  • RRC radio resource control
  • PDCP-C packet data convergence protocol-control plane
  • the main functions of the RRC protocol layer include mobility management (mobility management), access control (access control) and other functions.
  • Radio resource management mainly includes radio admission control (radio admission control), connection mobility control (connection mobility control) and so on.
  • the main functions of the current RRM are all performed by the gNB-CU-CP.
  • the target cell (such as target-gNB-CU-UP may be limited due to resource constraints) and target-gNB-DU) failed to allocate resources for the UE, thus causing UE access or handover failure.
  • target-gNB-CU-UP may be limited due to resource constraints
  • target-gNB-DU failed to allocate resources for the UE, thus causing UE access or handover failure.
  • the present application provides a mobility management method, which determines whether to allow a terminal device to access a cell by using resource state information including multiple cells and context information of a terminal device, so that a judgment can be made before the terminal device accesses a target cell, Then, the success rate of access is improved, the waste of resources is avoided, and centralized control of multiple cells is realized at the same time.
  • a mobility management method comprising: a first network device receiving a first message, the first message including information used to indicate a target cell; the first network device according to the following At least one kind of information to determine whether to allow a terminal device to access the target cell: context information of the terminal device, resource status information of the target cell.
  • the first network device may be a radio access intelligent controller in a radio access network architecture.
  • the functions of the wireless access intelligent controller may include handover decision, access control decision and other functions.
  • the first message includes a measurement report of the terminal device, or the first message includes an identifier of the target cell.
  • the first network device can determine whether to allow the terminal device to access, wherein, optionally, when the target cell does not belong to the wireless access intelligent control of the cell currently serving the terminal device
  • the wireless access intelligent controller can send the identification of the target cell to the first network device after making the handover decision and determining the target cell. It can realize service switching between RAN network elements, and can reduce the signaling interaction between RAN network elements and between RAN network elements and core network elements, and reduce waste of resources.
  • the method further includes: the first network device sends a second message, where the second message is used to initiate a handover procedure to the target cell.
  • the first network device may send a message to request handover in the target cell.
  • the second message sent by the above-mentioned first network device is used to initiate a handover procedure to the target cell, rather than sending the second message to the target cell.
  • the second message here may be sent to the serving The base station or network device of the target cell, or it can also be the base station or network device serving other cells, the base station or network device serving the target cell or other cells can initiate the communication between the terminal device and the target cell after receiving the second message. switching process.
  • the method when the first message includes a measurement report of the terminal device, the method further includes: the first network device according to the terminal device's measurement report A measurement report determines the target cell.
  • the first network device may determine whether to perform handover according to the information in the received measurement report, and further determine the target cell.
  • the first network device sends a second message, where the second message is used to initiate a handover procedure to the target cell, including: the first network device
  • the second message is sent to a second network device, where the second network device is a wireless network device serving the target cell.
  • the wireless network device may be a RAN functional network element device, such as a gNB (gNodeB), a centralized unit-control plane (centralized unit-control plane, CU-CP), a centralized unit-user plane (centralized unit-user plane, CU-UP) or distributed unit (distributed unit, DU).
  • the first network device may directly send a handover request to the wireless network device serving the target cell, because the first network device has already sent a handover request according to the resource status of the wireless network device or the terminal device before sending the request. Therefore, it can be ensured that the target cell successfully completes the handover process, thereby improving the success rate of handover and reducing waste of resources.
  • the method further includes: the first network device sends a third message to a third network device, where the third message includes the terminal device switching to The information of the target cell, the third network device is a network device serving the source cell, wherein the source cell is the cell to which the terminal device is connected before the handover process occurs.
  • the first network device sends a second message, where the second message is used to initiate a handover procedure to the target cell, including: the first network device The second message is sent to a fourth network device, where the fourth network device is a wireless network device serving a source cell, where the source cell is a cell to which the terminal device is connected before a handover process occurs.
  • the first network device can send the confirmed target cell information to the source cell serving the terminal device, so that the source cell can initiate a handover procedure to the target cell according to the target cell information.
  • the first network device because the first network device has already judged according to the resource status of the wireless network device or the context information of the terminal device before sending the message, it can ensure that the target cell successfully completes the handover process, thereby improving the success rate of the handover and reducing the waste of resources .
  • the method further includes: sending, by the first network device, a fourth message, where the fourth message is used to request to acquire context information of the terminal device;
  • the first network device receives the context information of the terminal device.
  • the first network device may send a request to the network device serving the source cell to request to obtain the context information of the terminal device, so that the first network device can further Whether the terminal device is allowed to access the target cell is judged according to the context information of the terminal device, thereby improving the success rate of handover and reducing the waste of resources.
  • the method further includes: the first network device receives a fifth message, where the fifth message is used by the first network device to update the terminal Context information for the device.
  • the first network device may receive updated context information after the terminal device is switched between cells, such as RRC configuration and routing information after the switch, so that the first network device can determine whether to allow the terminal according to the latest context information.
  • the device accesses the target cell, thereby improving the success rate of handover and reducing waste of resources.
  • the first network device determining whether to allow a terminal device to access the target cell according to at least one of the following information further includes: the first network The device determines whether to allow the terminal device to access the target cell according to the access control policy.
  • the first network device can further determine whether to allow the terminal device to access the target cell according to the access control policy, thereby improving the success of the handover. rate, reducing waste of resources.
  • the method further includes: receiving, by the first network device, a sixth message, where the sixth message includes an access control AC policy.
  • the first network device can further judge whether the terminal device is allowed to access the cell according to the access control policy, thereby improving the success rate of handover and reducing waste of resources.
  • a mobility management method includes: a second network device receives a first message, where the first message includes a measurement report of a terminal device; and the second network device receives a first message according to the first message. , determine the target cell to be accessed by the terminal device; the second network device determines that the target cell exceeds the service range of the second network device; the second network device sends a second message to the first network device , the second message includes the identifier of the target cell, wherein the service range of the first network device covers the target cell.
  • the second network device may be an intelligent radio access controller that manages the source cell that provides services for the terminal device, and at this time, the second network device may send information including the target cell information message.
  • the second network device can determine the radio access intelligent controller corresponding to the target cell according to the locally configured information, and report to the radio access controller.
  • the intelligent controller sends the information of the target cell, so that the wireless access intelligent controller can further initiate the handover process in the target cell, realizes the service handover process across the wireless access intelligent controller, and improves the success rate of the handover , reducing the waste of resources.
  • the method further includes: receiving, by the second network device, a third message, where the third message includes a signal that the terminal device is handed over to the target cell information; the second network device sends a fourth message, where the fourth message includes information that the terminal device switches to the target cell.
  • a mobility management method includes: a third network device sends a first message, the first message includes a measurement report of a terminal device; the third network device receives the second message, the The second message includes the identifier of the target cell, and the target cell is the cell to be accessed by the terminal device; the third network device sends a third message, and the third message is used to initiate a handover to the target cell process.
  • a mobility management method comprising: receiving a first message by a fourth network device, the first message including information used to indicate a target cell; the fourth network device according to the access control policy to determine whether to allow the terminal device to access the target cell.
  • the above-mentioned fourth network device may be an intelligent radio access controller whose service range covers the target cell.
  • the fourth network device Before the terminal device accesses the target cell, the fourth network device can perform centralized judgment according to the access control policy, avoiding a large number of access control processes between the terminal device and the target cell, thereby reducing the number of network elements in the wireless network.
  • the signaling interaction reduces the waste of resources and at the same time improves the centralized control capability of the network.
  • the first message is used to request to acquire the context information of the terminal device, and the method further includes: the fourth network device sends a second message, The second message includes context information of the terminal device.
  • the network element of the target cell needs to restore the context information of the terminal device.
  • the terminal device performs access control, and after it is determined that it is allowed to access the target cell, it sends the context information of the terminal device to the network element of the target cell, so that the network device of the target cell can prevent the network device of the target cell from sending the network of the cell that served the terminal device before.
  • the device sends a request to obtain context information, and the method of the present application can restore UE-related information on the network element of the target cell based on the context information locally saved by the fourth network device, thereby reducing signaling interaction between network elements and reducing Waste of resources.
  • the method further includes: the fourth network device receives a third message, where the third message is used by the fourth network device to update the terminal Context information for the device.
  • the fourth network device may receive the updated context information of the UE, so as to more accurately perform access control on the terminal device according to the updated context information.
  • the first message is used to request access to the target cell.
  • the fourth network device may determine to allow the terminal device to access the target cell according to an access control policy.
  • the method of the present application can perform centralized judgment according to the access control strategy, avoid a large number of access control processes between the terminal equipment and the target cell, thereby reducing the signaling interaction between each network element of the wireless network and reducing the waste of resources.
  • the centralized control capability of the network is improved.
  • the method further includes: the fourth network device sending a fourth message, where the fourth message is used to indicate that the network device in the target cell is in the When an access request is received, it is reported to the fourth network device.
  • the fourth network device can centrally control the cells located within its service range, thereby reducing the number of network elements in the wireless network.
  • the signaling interaction can reduce the waste of resources, and at the same time, improve the centralized control capability of the network.
  • the method further includes: the fourth network device sends a fifth message, where the fifth message includes allowing the terminal device to access the target cell Information.
  • the fourth network device may send a message to the target cell to instruct the target cell and the terminal device to complete the access.
  • the method further includes: the fourth network device receives a sixth message, where the sixth message includes the access control AC policy.
  • the fourth network device can perform the access control process based on the access control policy.
  • the access control function of the 5G RAN can be decoupled from the CP to realize open wireless access. Centralized control of the network.
  • an apparatus for mobility management includes: a first receiving module, configured to receive a first message, where the first message includes information used to indicate a target cell; a first processing module, configured with and determining whether to allow the terminal device to access the target cell according to at least one of the following information: context information of the terminal device and resource status information of the target cell.
  • the first message includes a measurement report of the terminal device, or the first message includes an identifier of the target cell.
  • the apparatus further includes: a first sending module, configured to send a second message, where the second message is used to initiate a handover procedure to the target cell.
  • the first processing module when the first message includes the measurement report of the terminal device, is further configured to: according to the measurement report of the terminal device , and determine the target cell.
  • the first sending module is specifically configured to: send the second message to a second network device, where the second network device serves the target cell network equipment.
  • the first sending module is further configured to: send a third message to a third network device, where the third message includes that the terminal device switches to the information of the target cell, the third network device is a network device serving the source cell, wherein the source cell is the cell to which the terminal device is connected before the handover process occurs.
  • the first sending module is specifically configured to: send the second message to a fourth network device, where the fourth network device is a network serving the source cell equipment, wherein the source cell is the cell to which the terminal equipment is connected before the handover process occurs.
  • the first sending module is further configured to: send a fourth message, where the fourth message is used to request to acquire the context information of the terminal device; the first The receiving module is further configured to: receive the context information of the terminal device.
  • the first receiving module is further configured to: receive a fifth message, where the fifth message is used by the apparatus to update the context information of the terminal device.
  • the first processing module is further configured to: determine whether to allow a terminal device to access the target cell according to an access control policy.
  • the first receiving module is further configured to: receive a sixth message, where the sixth message includes an access control AC policy.
  • an apparatus for mobility management includes: a second receiving module, configured to receive a first message, where the first message includes a measurement report of a terminal device; a second processing module, configured to The first message determines the target cell to be accessed by the terminal device; the second processing module is further configured to: determine that the target cell exceeds the service range of the second network device; the second sending module, using sending a second message to the first network device, where the second message includes the identifier of the target cell, wherein the service range of the first network device covers the target cell.
  • the second receiving module is further configured to: receive a third message, where the third message includes information that the terminal device switches to the target cell;
  • the second sending module is further configured to: send a fourth message, where the fourth message includes information that the terminal device switches to the target cell.
  • an apparatus for mobility management includes: a third sending module, configured to send a first message, where the first message includes a measurement report of a terminal device; a third receiving module, configured to receive a second message, where the second message includes an identifier of a target cell, where the target cell is a cell to be accessed by the terminal device; the third sending module is further configured to: send a third message, the third message for initiating a handover procedure to the target cell.
  • an apparatus for mobility management includes: a fourth receiving module, configured to receive a first message, where the first message includes information used to indicate a target cell; a fourth processing module, configured with according to the access control policy, to determine whether to allow the terminal equipment to access the target cell.
  • the first message is used to request to acquire the context information of the terminal device
  • the apparatus further includes: a fourth sending module, configured to send a second message , the second message includes context information of the terminal device.
  • the fourth receiving module is further configured to: receive a third message, where the third message is used by the apparatus to update the context information of the terminal device.
  • the first message is used to request access to the target cell.
  • the apparatus further includes: a fifth sending module, configured to send a fourth message, where the fourth message is used to indicate a network device in the target cell When an access request is received, it is reported to the device.
  • a fifth sending module configured to send a fourth message, where the fourth message is used to indicate a network device in the target cell When an access request is received, it is reported to the device.
  • the fourth sending module or the fifth sending module is further configured to: send a fifth message, where the fifth message includes allowing the terminal device to access the information about the target cell.
  • the fourth receiving module is further configured to: receive a sixth message, where the sixth message includes the access control AC policy.
  • a communication device in a ninth aspect, has the function of implementing the methods described in the above aspects.
  • This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • a communication device comprising: a processor; the processor is configured to be coupled with a memory, and used to call and run a computer program from the memory, so as to execute the above-mentioned aspects or any possible possible aspects of the various aspects. method in the implementation.
  • a communication device comprising, a processor, and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device performs the above-mentioned aspects or A method in any possible implementation of the various aspects.
  • a twelfth aspect provides an apparatus (eg, the apparatus may be a system-on-a-chip), the apparatus including a processor for supporting a communication apparatus to implement the functions involved in the above aspects.
  • the device further includes a memory for storing necessary program instructions and data of the communication device.
  • the device When the device is a system-on-chip, it may be composed of chips, or may include chips and other discrete devices.
  • a computer-readable storage medium for storing a computer program, the computer program comprising instructions for performing a method as described above in each aspect or in any possible implementation of each aspect.
  • a fourteenth aspect there is provided a computer program product comprising a computer program which, when run on a computer device, causes the computer device to perform the method according to the above aspects.
  • a fifteenth aspect provides a communication system, where the communication system includes a first network device, a second network device, a third network device, and a fourth network device;
  • the first network device is configured to perform the above-mentioned first aspect, or The steps performed by the first network device in the solutions provided by the embodiments of the present application;
  • the second network devices are configured to perform the steps performed by the second network device in the above-mentioned second aspect or the solutions provided by the embodiments of the present application;
  • the third The network device is used to perform the steps performed by the third network device in the third aspect or the solutions provided by the embodiments of the present application;
  • the fourth network device is configured to perform the steps in the fourth aspect or the solutions provided by the embodiments of the present application. Steps performed by the fourth network device in .
  • Figure 1 is a schematic diagram of a new RAN system architecture.
  • Figure 2 is a schematic diagram of the protocol functions in the 5G RAN system architecture.
  • Figure 3 is a schematic diagram of the RRM function in the 5G RAN system architecture.
  • FIG. 4 is a schematic diagram of a UE handover process.
  • FIG. 5 is a schematic diagram of a mobility management method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another mobility management method according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another mobility management method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another mobility management method according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a handover of a UE according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another UE handover according to an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of another UE handover according to an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of a UE transitioning from a deactivated state to a connected state according to an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of an initial network access of a UE according to an embodiment of the present application.
  • FIG. 14 is a schematic diagram of an apparatus for mobility management according to an embodiment of the present application.
  • FIG. 15 is a schematic diagram of another mobility management apparatus according to an embodiment of the present application.
  • FIG. 16 is a schematic diagram of another mobility management apparatus according to an embodiment of the present application.
  • FIG. 17 is a schematic diagram of another mobility management apparatus according to an embodiment of the present application.
  • FIG. 18 is another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • FIG. 19 is another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • FIG. 20 is another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • FIG. 21 is another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the terminal device in this embodiment of the present application may be a device with a wireless transceiver function, which may be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it may also be deployed on water (such as a ship, etc.); or Deployed in the air (eg, aircraft, balloons, satellites, etc.).
  • the terminal equipment can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment can It is mobile phone (mobile phone), tablet computer (Pad), computer with wireless transceiver function, mobile internet device (MID), wearable device, virtual reality (VR) terminal device, augmented reality (augmented reality) reality, AR) terminal equipment, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical (remote medical), wireless terminal in smart grid (smart grid) Terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of this application do not limit application scenarios. Terminals
  • the equipment may also be sometimes referred to as user equipment (UE), mobile station, remote station, etc.
  • the embodiments of this application do not limit the specific technology, equipment form, and name used by the terminal equipment.
  • the network device in this embodiment of the present application may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node) in a long term evolution (long term evolution, LTE) system or an evolved LTE system (LTE-advanced, LTE-A).
  • NodeB or eNB or e-NodeB, evolutional Node in a long term evolution (long term evolution, LTE) system or an evolved LTE system (LTE-advanced, LTE-A).
  • LTE long term evolution
  • LTE-A evolved LTE system
  • radio network controller radio network controller
  • node B node B (Node B, NB)
  • base station controller base station controller
  • base transceiver station base transceiver station, BTS
  • transmission reception point TRP
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • base band unit base band unit, BBU
  • baseband pool BBU pool Or WiFi access point (access point, AP), etc.
  • centralized unit centralized unit, CU
  • distributed unit distributed unit in cloud access network (cloud radio access network, Cloud RAN) system , DU)
  • CU supports radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (service data adaptation) protocol, SDAP) and other protocols;
  • DU mainly supports radio link control layer (radio link control, RLC), media access control layer (media access control, MAC) and physical layer protocols.
  • the new RAN architecture includes functions including radio access management controller, radio access intelligent controller, CU-CP, CU-UP, DU and RU.
  • the wireless access intelligent controller, CU-CP, CU-UP, DU and RU can provide the service functions of the wireless network control plane and user plane, and the wireless access management controller and operation, administration and maintenance (operation, administration and maintenance, OAM) together can provide the business function management of the management plane.
  • the radio access intelligent controller as the centralized control node of the new RAN control plane function, can use the AI/ML model to realize the automatic and intelligent management of the radio network resources.
  • Radio Access Management Controller Its functions are latency-insensitive control and optimization of new RAN functional network elements and resources, execution of AI/ML workflows (including model training and update), and policy-based implementation of application/feature management.
  • Radio access intelligent controller its function is to implement data collection and operation instructions based on the interface between it and new RAN functional network elements (such as R2 ⁇ R3 ⁇ R4) to new RAN functional network elements (such as CU-CP, etc.) As well as resource control and optimization.
  • new RAN functional network elements such as R2 ⁇ R3 ⁇ R4
  • new RAN functional network elements such as CU-CP, etc.
  • CU-CP implements the control plane functions of the RRC protocol and the PDCP protocol;
  • CU-UP implements PDCP protocol user plane and SDAP protocol functions
  • RU wireless unit, realizes the protocol function of low-PHY and splits the RF processing function based on the bottom layer;
  • OAM Provides operation and maintenance management of new-RAN functional modules.
  • gNB-CU-CP can implement the functions of RRC and PDCP-C protocols.
  • the main functions of the RRC protocol layer include mobility management, access control, and access control. and other functions. Among them, Mobility management, Access Control and other functions are part of the wireless network management function (radio resource management, RRM).
  • RRM radio resource management
  • RRM mainly includes functions such as wireless admission control Radio Admission Control, connection mobility management Connection Mobility Control and other functions , it can be seen that the main functions of the current RRM (including access control, mobility management, etc.) are all performed by the gNB-CU-CP.
  • the target-gNB-CU-CP cannot perceive the available resource status information of the gNB-DU and gNB-CU-UP, when the terminal device requests to access the target cell, the target-gNB-CU-UP may be caused by limited resources. And target-gNB-DU fails to allocate resources for UE, which in turn leads to UE access or handover failure.
  • the source gNB-CU-UP (source-CU-UP, S-CU-UP) of the source cell can make a decision based on the UE's measurement report.
  • Perform handover (HO) processing for the UE further determine the target cell or base station for handover, and initiate a handover processing flow to the target CU-UP (target-CU-UP, T-CU-UP) of the target cell or base station.
  • the Target-gNB-CU-CP receives the handover request, it performs access control (for example, based on control policies such as User/UE blacklist and whitelist, number of users, etc. to determine whether to allow the UE to access the target cell or base station).
  • Target-gNB-CU-UP and target-gNB-DU the target side network element
  • the Target-gNB-CU-CP receives the handover request
  • the UE if it is allowed to access, it directly interacts with the target-gNB-CU-UP and target-DU in signaling to trigger operations such as related resource allocation.
  • the target-gNB-CU-CP cannot perceive the available resource status information of the gNB-DU and gNB-CU-UP, the target-gNB-CU-UP and target-gNB-DU may be allocated to the UE due to resource constraints.
  • the UE when the UE accesses the target cell, it needs to send an RRC request to the T-CU-CP.
  • the UE communicates with each T-CU-CP. A large number of signaling interactions will occur between CU-CPs, which will inevitably lead to waste of resources.
  • the present application proposes a mobility management method, which determines whether to allow the terminal device to access the cell by using the context information of the terminal device and the resource status information of the target cell, so that a judgment can be made before the terminal device accesses the target cell, Then, the success rate of access is improved, the waste of resources is avoided, and centralized control of multiple cells is realized at the same time.
  • the function of the radio access management controller is to control and optimize the delay-insensitive services of the new RAN functional network elements and resources, and to perform AI/ ML workflow (including model training and updating) and application/feature management based on policy implementation.
  • the radio access management controller mainly provides the functions of the management plane, so it is co-deployed with the management entity; the functions of the radio access intelligent controller are based on the interface between it and the new RAN functional network elements (such as R2 ⁇ R3 ⁇ R4) data collection and operation instructions realize the control and optimization of new RAN functional network elements (such as CU-CP, etc.) and resources; CU-CP realizes RRC protocol and PDCP protocol control plane functions; CU-UP realizes PDCP protocol User plane and SDAP protocol functions; DU implements RLC/MAC/High-PHY protocol functions.
  • the new RAN functional network elements such as R2 ⁇ R3 ⁇ R4
  • data collection and operation instructions realize the control and optimization of new RAN functional network elements (such as CU-CP, etc.) and resources
  • CU-CP realizes RRC protocol and PDCP protocol control plane functions
  • CU-UP realizes PDCP protocol User plane and SDAP protocol functions
  • DU implements RLC/MAC/High-PHY protocol functions.
  • FIG. 1 the schematic diagram of the novel RAN system architecture shown in FIG. 1 is only an example, and the embodiments of the present application may also be applied to other system architectures representing the novel RAN, which are not limited in the present application.
  • FIG. 5 shows a schematic diagram of a mobility management method according to an embodiment of the present application. As shown in FIG. 5 , the method includes steps S510 and S520, which will be described in detail below.
  • the first network device receives a first message, where the first message includes information used to indicate a target cell.
  • the first network device may be an intelligent radio access controller, and the intelligent radio access controller may implement control and optimization of new RAN functional network elements (such as CU-CP, etc.) and resources.
  • new RAN functional network elements such as CU-CP, etc.
  • the first message may include a measurement report of the terminal device.
  • the measurement report of the terminal device may be obtained from the base station or network device of the serving source cell.
  • the first network device may determine the target cell according to the measurement report, and specifically, the first network device may determine whether the current terminal device is to be handed over according to the information carried in the measurement report. If the cell is determined to be handed over, the target cell may be further determined according to the quality information between the terminal equipment and multiple cells carried in the measurement report.
  • the first message may include the identity of the target cell.
  • the first network device may also directly receive the identifier of the target cell.
  • the first network device determines whether to allow the terminal device to access the target cell according to at least one of the following information: context information of the terminal device and resource status information of the target cell.
  • the first network device may locally store the context information of the terminal device (such as UE identity, service quality of service (QoS) information, session information (such as user plane tunnel/bearer routing information, session identity, etc.) , if the first network device does not store the context information of the terminal device locally, the context information can be obtained through other network devices.
  • the method further includes: the first network device sends a fourth message, the fourth message It is used for requesting to acquire the context information of the terminal device; the first network device receives the context information of the terminal device.
  • the resource status information of the target cell may include radio control resources, such as bandwidth and the like.
  • the existing technology of the new RAN already supports the wireless access intelligent controller to monitor the performance data (such as resource status information) of the CU-CP/DU/CU-UP based on the R2/R3/R4 interface.
  • the wireless access intelligent controller has learned the performance data of the CU-CP/DU/CU-UP.
  • the wireless access intelligent controller can perform access control or determine whether to allow the terminal device to access the target based on the resource status. community.
  • the first network device may further determine whether to allow the terminal device to access the target cell according to the access control policy.
  • the access control policy may include: UE blacklist, user number limit and other information (such as judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE access exceeds the set user limit, etc. ).
  • the above-mentioned access control policy may be received by the first network device.
  • the method further includes: the first network device receives a sixth message, where the sixth message includes the access control AC policy.
  • the first network device may also receive a message for creating a policy instance, and create a corresponding access control policy.
  • the first network device may continue to send a message to request to initiate a handover procedure with the target cell.
  • the method further includes: the first network device sends a first Two messages, where the second message is used to initiate a handover procedure to the target cell.
  • the second message here is used to initiate a handover procedure to the target cell, which does not mean that the second message is sent to the target cell, and the second message may be sent to the base station or network device serving the target cell. , or, the second message may also be sent to the base station or network device serving other cells, while the base station and network device serving the target cell or other cells are network devices that can initiate a handover process with the target cell according to the second message .
  • the first network device may directly send a second message to the base station or network device serving the target cell, thereby initiating a handover procedure in the target cell.
  • Two messages, where the second message is used to initiate a handover procedure to the target cell includes: the first network device sending the second message to a second network device, the second network device serving the target cell network equipment.
  • the first network device when the first network device directly sends the second message to the base station or network device serving the target cell, in order to complete the handover between the terminal device and the target cell, the first network device may also switch to the source cell (that is, the terminal device switches).
  • the previously connected cell sends a message to inform that the current terminal device has been handed over to the target cell.
  • the method further includes: the first network device sends a third message to a third network device, where the third message includes all the information that the terminal device switches to the target cell, and the third network device is a network device serving a source cell, where the source cell is a cell to which the terminal device is connected before a handover process occurs.
  • the third message may include handover indication information (such as HO to T-CU-CP indication) and target RRC information, where the HO to T-CU-CP indication may be used to inform the network device serving the source cell , the UE has been handed over to the network equipment of the target cell.
  • the target RRC information can be used to inform the network device serving the source cell to initiate an RRC reconfiguration process, and send the target RRC information to the UE (enabling the UE to establish a new RRC connection with the target cell).
  • the target RRC information may include a target cell identity, routing information of the T-CU-CP/T-CU-UP/T-DU, and the like.
  • the first network device may send the above-mentioned third message to the network device serving the source cell after receiving the information sent by the target cell that the terminal device has been handed over to the target cell. Further, the first network device may update the local context information of the terminal device according to the received information sent by the target cell, where the updated context information may include information such as RRC configuration with the target cell.
  • the first network device may send a message to the base station or network device serving other cells, requesting to initiate a handover process, where the other cell may be the cell to which the terminal device is currently connected or the terminal device The cell connected before the handover process occurs.
  • the first network device sends a second message, and the second message is used to initiate the handover process to the target cell.
  • the process includes: the first network device sends a message to the fourth network device The second message is sent, and the fourth network device is a network device serving a source cell, where the source cell is a cell to which the terminal device is connected before a handover process occurs.
  • the fourth message may include: handover indication information (such as HO to T-CU-CP indication) and target RRC information, where the HO to T-CU-CP indication may be used to inform the network serving the source cell equipment, the UE has handed over to the network equipment of the target cell.
  • the target RRC information can be used to inform the network device serving the source cell to initiate an RRC reconfiguration process, and send the target RRC information to the UE (enabling the UE to establish a new RRC connection with the target cell).
  • the target RRC information may include a target cell identity, routing information of the T-CU-CP/T-CU-UP/T-DU, and the like.
  • the context information of the terminal device may be updated.
  • the method further includes: the first network device receives a fifth message, and the fifth message uses updating the context information of the terminal device at the first network device.
  • the context information of the terminal device updated by the first network device may include information such as routing addresses after switching.
  • the embodiment of the present application determines whether to allow the terminal device to access the target cell based on the perception of the network resource status and/or terminal context information of multiple cells, thereby avoiding the access failure of the network device due to insufficient resources, thereby reducing the RAN network. Unnecessary signaling interaction between cells reduces waste of resources, improves the success rate of access, and realizes centralized control of multiple cells.
  • FIG. 6 shows a schematic diagram of another mobility management method according to an embodiment of the present application. As shown in FIG. 6 , the method includes steps S610 to S640, which will be described in detail below.
  • the second network device receives a first message, where the first message includes a measurement report of the terminal device.
  • the second network device may be a wireless access intelligent controller.
  • the measurement report may be acquired by the second network device from a network device serving the source cell.
  • the second network device determines, according to the first message, a target cell to be accessed by the terminal device.
  • the second network device may determine whether to perform handover according to the quality information between the terminal device and multiple cells carried in the measurement report, and further determine the target cell to be accessed when determining the handover.
  • the second network device determines that the target cell exceeds the service range of the second network device.
  • the second network device determines, according to the information carried in the measurement report, that the target cell to be accessed is beyond its own service range.
  • the second network device sends a second message to the first network device.
  • the second message includes an identifier of the target cell, wherein the service range of the first network device covers the target cell.
  • the method further includes: the second network device receives a third message, where the third message includes information that the terminal device switches to the target cell; the second network device sends a fourth message message, the fourth message includes the information that the terminal device switches to the target cell.
  • the fourth message may include: handover indication information (such as HO to T-CU-CP indication) and target RRC information, where the HO to T-CU-CP indication may be used to inform the network device of the serving source cell, The UE has handed over to the network equipment of the target cell.
  • the target RRC information can be used to inform the network device serving the source cell to initiate an RRC reconfiguration process, and send the target RRC information to the UE (enabling the UE to establish a new RRC connection with the target cell).
  • the target RRC information may include a target cell identity, routing information of the T-CU-CP/T-CU-UP/T-DU, and the like.
  • the second network device may send a message to the base station or network device serving the source cell according to the received information that the terminal device switches to the target cell, informing the base station or network device serving the source cell that the terminal device has completed the switch to the target cell.
  • the embodiment of the present application determines the target cell to be accessed by sensing the resource status of multiple cells, and when the target cell exceeds its own service range, sends the information of the target cell to other network devices, so that other network devices can The handover process to the target cell can be further initiated, thereby reducing unnecessary signaling interaction between RAN network elements, reducing resource waste, improving the success rate of access, and realizing centralized control of multiple cells.
  • FIG. 7 shows a schematic diagram of another mobility management method according to an embodiment of the present application. As shown in FIG. 7 , the method includes steps S710 to S730, which will be described in detail below.
  • the third network device sends a first message, where the first message includes a measurement report of the terminal device.
  • the third network device may be a base station or a network device in a source cell currently serving the terminal device, and the measurement report sent by the third network device may be obtained from the terminal device.
  • the third network device receives a second message, where the second message includes an identifier of a target cell, where the target cell is a cell to be accessed by the terminal device.
  • the third network device can send the measurement report to other network devices, such as the first network device in this application, so that the first network device can determine that the target cell can be accessed according to the measurement report, and obtain the target cell from the first network device Information.
  • the third network device sends a third message, where the third message is used to initiate a handover procedure to the target cell.
  • This embodiment of the present application sends the received measurement report of the terminal device to other devices, such as the first network device, so that other devices can determine the target cell based on the measurement report and send it to the third network device, avoiding the need for the third network device (
  • the base station or network equipment serving the source cell needs to determine the target cell based on the measurement report, so as to avoid the access failure of the network equipment due to insufficient resources in the later stage, thereby reducing unnecessary signaling interaction between RAN network elements and reducing It reduces the waste of resources, improves the success rate of access, and realizes centralized control of multiple cells at the same time.
  • FIG. 8 shows a schematic diagram of another mobility management method according to an embodiment of the present application. As shown in FIG. 8 , the method includes steps S810 to S820, which will be described in detail below.
  • the fourth network device receives a first message, where the first message includes information used to indicate a target cell.
  • the above-mentioned fourth network device may be an intelligent radio access controller whose service range covers the target cell.
  • the embodiments of the present application may be applied to a scenario when a terminal device is converted from an inactive state (inactive) to a connected state (connected).
  • the first message received by the fourth network device is used to request to acquire the context information of the UE.
  • the embodiments of the present application may be applied to a scenario when a terminal device initially accesses a network, specifically, the first message is used to request access to the target cell.
  • the fourth network device may send a message to multiple network devices or base stations in the serving cell, informing them to report to the fourth network device when receiving the access request.
  • the fourth network device sends a fourth message, where the fourth message is used to instruct the network device in the target cell to report to the fourth network device when receiving the access request.
  • the fourth network device can centrally control the cells located within its service range, thereby reducing the number of network elements in the wireless network.
  • the signaling interaction can reduce the waste of resources, and at the same time, improve the centralized control capability of the network.
  • the fourth network device determines whether to allow the terminal device to access the target cell according to the access control policy.
  • the access control policy may include: UE blacklist, user number limit and other information (such as judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE access exceeds the set user limit, etc. ).
  • the above-mentioned access control policy may be received by a fourth network device, and specifically, the method further includes: the fourth network device receives a sixth message, where the sixth message includes the access control policy .
  • the fourth network device may send the context information of the terminal device to the network device serving the target cell, specifically, the first network device The message is used to request to acquire the context information of the terminal device, and the method further includes: the fourth network device sends a second message, where the second message includes the context information of the terminal device.
  • the fourth network device may locally store the context information of the UE, so as to send the context of the UE when receiving a request for acquiring the context of the UE. Therefore, the network device serving the target cell can be prevented from sending a request to the network device of the cell serving the terminal device before to obtain the context information, and the method of the present application can restore the network element of the target cell based on the context information locally saved by the fourth network device. UE-related information, thereby reducing signaling interaction between network elements and reducing resource waste.
  • the method further includes: the fourth network device receives a third message, where the third message is used by the fourth network device to update the context information of the terminal device.
  • the method further includes: the fourth network device sends a fifth message, where the fifth message includes information allowing the terminal device to access the target cell.
  • the fourth network device can perform the access control process based on the access control policy.
  • the access control function of the 5G RAN can be decoupled from the CP, and the access control function of multiple cells can be decoupled.
  • the centralized control of the network thereby reducing unnecessary signaling interaction between RAN network elements and reducing resource waste.
  • FIG. 9 shows a schematic flowchart of a handover of a UE according to an embodiment of the present application. As shown in Figure 9:
  • the UE sends a measurement report (Measurement report) to a source DU (source-DU, S-DU). Specifically, the UE performs signal measurement on its measurement configuration based on the network, and sends the measurement result to the S-DU as a measurement report.
  • the UE Measurement report may include the UE identification and the RSRP (Reference Signal Received Power, reference signal received power), RSRQ (Reference Signal Received Quality, reference signal received quality) and RS-SINR (Reference Signal-Signal to Interference plus) measured by the UE Noise Ratio, reference signal-to-interference-to-noise ratio).
  • the S-DU sends an uplink RRC message to the source CU-CP (source CU-CP, S-CU-CP), which may carry the measurement report received in S901.
  • S901 and S902 belong to the prior art.
  • the S-CU-CP sends a first message to the wireless access intelligent controller. Specifically, after receiving the measurement report information of the UE, the S-CU-CP can send the UE Measurement report to the intelligent radio access controller through an R2 interface message (such as a report message) with the intelligent radio access controller.
  • the wireless access intelligent controller performs handover decision and access control.
  • the intelligent radio access controller needs to perform three service functions:
  • the radio access intelligent controller performs the handover decision based on the information of the UE Measurement report, that is, determines whether to perform the handover on the UE. Whether the UE needs to switch cells, for example, may determine, based on the first threshold, that the RSRP in the measurement report does not meet the first threshold, and at this time, the intelligent radio access controller may trigger the handover process.
  • the radio access intelligent controller determines that the handover process is triggered, it further determines the target cell for the handover. Specifically, the radio access intelligent controller can determine the channel quality information of the UE and other cells carried in the measurement report to determine the handover target cell. the target area.
  • Access control According to the requirements of the UE in the context of the UE stored locally (such as QoS information in the context, or bandwidth requirements, etc.), the network elements corresponding to the target cell (including T-CU- CP, T-CU-UP, T-DU) resource status (for example, the available resource status of the network element corresponding to the target cell can meet the service requirements of the UE) and the access control (AC) strategy to access the UE. access control.
  • the access control policy may refer to information such as UE blacklist and user limit (for example, judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE exceeds the set user limit after access, etc.).
  • the UE context includes information such as UE identity, service QoS, session information (such as user plane tunnel/bearer routing information, session identity, etc.).
  • the existing technology of the new RAN already supports the radio access intelligent controller to monitor the performance data (such as resource status information) of the CU-CP/DU/CU-UP based on the interface with the new RAN network elements. Therefore, this application Based on the wireless access intelligent controller having learned the performance data of the CU-CP/DU/CU-UP, in the solution of the present application, the wireless access intelligent controller can perform access control based on the resource state.
  • the intelligent radio access controller when the intelligent radio access controller finds in this step that the resource state of the target cell determined in the handover decision process does not meet the requirements of the UE, the intelligent radio access controller can use the measurement reported by the UE information of other cells indicated in the report, and re-select the appropriate target cell.
  • Trigger handover processing of the target cell if the access control verification is passed and the UE is allowed to access the target cell, the intelligent radio access controller instructs the network element corresponding to the target cell to perform handover related processing.
  • the intelligent radio access controller sends a UE context request message to the S-CU-CP.
  • the intelligent radio access controller if the intelligent radio access controller does not store the context information of the UE locally, in step S904, after the intelligent radio access controller completes the handover decision processing, it cannot perform access control judgment on the UE in combination with the UE context information.
  • the intelligent radio access controller requests the S-CU-CP for the context of the UE through the R2 interface message, and the request message carries the UE identifier (UE ID) and the requested data type (UE context request indicator).
  • the radio access intelligent controller can also obtain the UE context based on the data subscription (R2Subscription message) currently supported by the R2 ⁇ R3 ⁇ R4 interface, and the requested data type is UE context.
  • the specific method is not specified in this application. Make specific restrictions.
  • the S-CU-CP sends the UE context information to the intelligent radio access controller.
  • the S-CU-CP returns the context information of the UE to the wireless access intelligent controller based on the request of the wireless access intelligent controller.
  • Interface messages (such as R2Indication messages) send the UE context to the radio access intelligence controller.
  • the wireless access intelligent controller sends a first message to the T-CU-CP.
  • the second message may be used to instruct the network element corresponding to the target cell to allocate resources for the UE and create local context information.
  • the intelligent radio access controller can instruct the network element corresponding to the target cell to allocate resources for the UE through an R2 interface message (such as an R2 control message), and create local context information, that is, to the target CU-
  • the CP/T-CU-CP sends an R2 control message, and carries information such as operation indication information (such as UE context setup indication) and UE context description (UE context) in the message.
  • the T-CU-CP sends a bearer context setup request message to the T-CU-UP.
  • the T-CU-CP initiates the handover process of the network element corresponding to the target cell according to the instruction of the radio access intelligent controller.
  • the T-CU-CP sends a bearer context setup request message to the T-CU-UP, requesting the T-CU-UP to allocate resources for the UE and create an E1 interface bearer.
  • T-CU-UP After T-CU-UP completes resource allocation and related processing operations, it replies with a bearer context setup response response message.
  • the T-CU-CP sends an F1UE context setup request request message to the T-DU, requesting the T-DU to allocate resources for the UE and create an F1 interface bearer.
  • the T-CU-CP sends a third message to the radio access intelligent controller, where the third message may include the local UE Context of the T-CU-CP.
  • the handover of the network element corresponding to the target cell is completed. process, and send the local UE Context of the T-CU-CP to the radio access intelligent controller through the R2 interface message (such as R2Indication).
  • the RAC may update its locally saved UE-related context based on the UE Context sent by the T-CU-CP.
  • the intelligent radio access controller sends a fourth message to the S-CU-CP, which is used to instruct the network element corresponding to the source cell to perform operations such as RRC reconfiguration.
  • the intelligent radio access controller instructs the network element corresponding to the source cell to perform RRC reconfiguration through an R2 interface message (such as an R2 control message), and Release relevant resources and delete UE-related context information, that is, send an R2 control message to the source CU-CP/S-CU-CP, and the message carries handover indication information (such as HO to T-CU-CP indication) and target RRC information.
  • R2 interface message such as an R2 control message
  • Release relevant resources and delete UE-related context information that is, send an R2 control message to the source CU-CP/S-CU-CP
  • the message carries handover indication information (such as HO to T-CU-CP indication) and target RRC information.
  • the HO to T-CU-CP indication can be used to inform the S-CU-CP that the UE has switched the T-CU-CP.
  • the target RRC information is used to inform the S-CU-CP to initiate an RRC reconfiguration process, and send the target RRC information to the UE (to enable the UE to establish a new RRC connection with the target cell).
  • the target RRC information includes the target cell identifier, the routing information of the T-CU-CP/T-CU-UP/T-DU, and the like.
  • the S-CU-CP sends an F1UE context modification request message to the S-DU.
  • the S-CU-CP initiates the handover process of the network element corresponding to the source cell according to the instruction of the radio access intelligent controller.
  • the message may carry the target RRC information in step S913, requesting the S-DU to initiate RRC reconfiguration processing.
  • the S-DU instructs the UE to perform RRC reconfiguration, that is, sends an RRC reconfiguration message to the UE, and the message carries the target RRC information in step 913.
  • the UE after receiving the request message, the UE performs corresponding RRC configuration update, and replies an RRC reconfiguration complete message to the S-DU.
  • the S-DU after receiving the response message from the UE, the S-DU replies the F1UE context modification response response message to the S-CU-CP.
  • S918, S-CU-CP and S-CU-UP perform signaling exchange related to the bearer context modification process, implement routing update carried by E1, and obtain the transmission status of user data (such as the SN of the data packet) from S-CU-UP No).
  • the S-CU-CP sends the transmission status of the user data and the routing address of the S-CU-UP to the T-CU-CP through the SN status transfer message.
  • the T-CU-CP after receiving the message of the S-CU-CP, the T-CU-CP sends a Bearer context modification request message to the T-CU-UP, carrying the routing address of the S-CU-UP in step 919, which is used to establish a connection with the S-CU-UP.
  • -Data forwarding channel between CU-UP The reason for establishing this channel is that after RRC reestablishment, the CP-UP of the source cell may still have some data that has not been sent to the UE. At this time, it can be sent to the CU-UP of the new cell first, and then sent to the UE by the new CU-UP. .
  • the T-CU-CP sends a fifth message to the intelligent radio access controller, where the message may carry the UE context information updated by the T-CU-CP.
  • the T-CU-CP confirms that the source cell network element has completed the processing, it sends the UE Context updated by the T-CP-CP to the radio access intelligent controller through an R2 interface message (such as R2Indication).
  • the radio access intelligent controller updates its locally stored UE-related context again based on the UE Context sent by the T-CP-CP.
  • the updated UE context information may include updated routing address information.
  • the T-CU-CP exchanges information with the core network element (such as the AMF), for example, sends a path switch request message to the AMF to update the downlink routing address of the user plane.
  • the core network element such as the AMF
  • the T-CU-CP confirms that the handover process is completed, and informs the S-CU-CP (such as sending a UE context release message) that it can delete the UE-related context on the source cell network element and release resources.
  • the S-CU-CP sends a Bearer context release request message to the S-CU-UP to release the E1 interface bearer.
  • the S-CU-CP sends an F1context release request message to the S-DU to release the F1 interface bearer.
  • the embodiments of this application are applied to the handover process in the new RAN architecture.
  • the intelligent radio access controller can directly make handover decision and access control according to the perception of RAN network element resource status, UE context and AC policy, and then directly initiate The handover processing of the target cell can reduce unnecessary signaling interaction between RAN network elements and improve the success rate of handover.
  • FIG. 10 is a schematic flowchart of another UE handover according to an embodiment of the present application. As shown in Figure 10:
  • S1001 to S1003 are the same as S901 to S903 in FIG. 9 , and will not be repeated here.
  • the wireless access intelligent controller performs handover decision and access control. Specifically, after receiving the measurement report from the UE, the intelligent radio access controller needs to perform three service functions:
  • Trigger the source cell to initiate handover process if the access control verification is passed and the UE is allowed to access the target cell, the radio access intelligent controller instructs the network element corresponding to the source cell to initiate handover related processing.
  • the intelligent radio access controller sends a second message to the S-CU-CP, instructing the source cell to perform handover processing.
  • the intelligent radio access controller can instruct the network element corresponding to the source cell to initiate a handover processing flow through an R2 interface message (such as an R2 control message), and can send the source CU-CP/S-CU-
  • the CP sends an R2 control message, which may carry information such as operation indication information (such as HO indication) and target cell id (Target cell id).
  • the S-CU-CP after receiving the handover instruction from the wireless access intelligent controller, the S-CU-CP initiates signaling interaction with the target CU-CP (the network element corresponding to the target cell determined based on the target cell id), that is, to the T-CU-CP The CP sends the HO request message.
  • the target CU-CP the network element corresponding to the target cell determined based on the target cell id
  • S1007-S1011 are the same as S908-S911 in FIG. 9 .
  • S1012-S1024 are the same as S914-S926 in FIG. 9 , wherein, in S1020, the T-CU-CP sends a third message to the radio access intelligent controller, and the message may carry the UE context updated by the T-CU-CP information.
  • the T-CU-CP confirms that the processing of the source cell network element is completed, it sends the UE Context updated by the T-CP-CP to the radio access intelligent controller through an R2 interface message (such as R2Indication).
  • the radio access intelligent controller updates its locally stored UE-related context again based on the UE Context sent by the T-CP-CP.
  • the updated UE context information may include updated routing address information.
  • the embodiments of the present application are applied to the handover process in the new RAN architecture.
  • the intelligent radio access controller can directly make handover decision and access control according to the perception of the resource status of the RAN network element, as well as the UE context and AC policy, and then assign the target The information of the cell is notified to the source cell, so that the source cell further initiates the handover process with the target cell, which can reduce unnecessary signaling interaction between RAN network elements and improve the handover success rate.
  • FIG. 11 shows a schematic flowchart of a handover of another UE according to an embodiment of the present application. As shown in Figure 11:
  • S1101 to S1103 are the same as S901 to S903 in FIG. 9 , and will not be repeated here.
  • the source wireless access intelligent controller makes a handover decision. Specifically, after receiving the measurement report of the UE, the S-radio access intelligent controller executes the handover decision, that is, the S-radio access intelligent controller executes the handover decision based on the information of the UE Measurement report, that is, determines whether to execute the handover on the UE, If necessary, further determine the target cell for handover. For the specific handover decision and the determination of the target cell, reference may be made to the relevant description in the embodiment of FIG. 10 .
  • the S-radio access intelligent controller sends a second message to the target radio access intelligent controller (T-radio access intelligent controller), where the second message is used to request the T-radio access intelligent controller to send the target
  • the cell initiates the handover procedure.
  • the S-radio access intelligent controller is based on locally stored information (it should be understood that , the information may be locally configured by the radio access intelligent controller) to determine the target radio access intelligent controller (T-radio access intelligent controller) to which the target cell belongs, and send the handover to the T-radio access intelligent controller Request message/HO request, the message can carry UE identity, UE context and target cell identity.
  • the handover request message may be sent through the interface between the wireless access intelligent controllers. If there is no direct interface between the wireless access intelligent controllers, the wireless access intelligent controllers are used to indirectly forward the interactive messages between the wireless access intelligent controllers, and the specific method is not limited in this application.
  • the T-wireless access intelligent controller performs access control. Specifically, the T-radio access intelligent controller receives the handover request from the S-radio access intelligent controller, and determines the network element (including the T-CU-CP ⁇ T-CU) corresponding to the target cell based on the Target cell id in the message -UP/T-DU), and according to the requirements of the UE in the UE context in the message (such as the QoS information in the context), the resource status of the network element corresponding to the target cell (for example, the available resource status of the network element corresponding to the target cell can satisfy the The service requirements of the UE) and the access control policy perform access control on the UE.
  • the network element including the T-CU-CP ⁇ T-CU
  • the resource status of the network element corresponding to the target cell for example, the available resource status of the network element corresponding to the target cell can satisfy the The service requirements of the UE
  • the access control policy perform access control on the UE.
  • the T-radio access intelligent controller instructs the network element corresponding to the target cell to perform handover related processing.
  • the T-radio access intelligent controller sends the first message to the T-CU-CP, where the third message may be used to instruct the network element corresponding to the target cell to allocate resources for the UE and create local context information.
  • the T-radio access intelligent controller instructs the network element corresponding to the target cell to allocate resources for the UE through an R2 interface message (such as an R2 control message), and creates local context information, that is, to the target CU -CP/T-CU-CP sends R2 control message, which can carry operation indication information (such as UE context setup indication) and UE context description/UE context and other information.
  • R2 interface message such as an R2 control message
  • the T-radio access intelligent controller may also send an indication message to the S-CU-CP of the source cell, indicating that The S-CU-CP initiates the HO process to the network element of the target cell.
  • the T-radio access intelligent controller may also send an indication message to the S-CU-CP of the source cell, indicating that The S-CU-CP initiates the HO process to the network element of the target cell.
  • S1108-S1120 are the same as S908-S912 in FIG. 9 , and details are not repeated in this embodiment of the present application.
  • the T-radio access intelligent controller sends a fifth message to the S-radio access intelligent controller, where the fifth message may be used to inform the S-radio access intelligent controller that the target cell has completed handover.
  • the T-radio access intelligent controller replies to the S-radio access intelligent controller with a handover request response message/HO request Ack. Carry the UE identity and target RRC information, etc.
  • S1114-S1127 are the same as S913-S926 in FIG. 9 .
  • the T-CU-CP sends a seventh message to the T-radio access intelligent controller, where the message may carry the UE context information updated by the T-CU-CP.
  • the T-CU-CP confirms that the processing of the source cell network element is completed, it sends the UE Context updated by the T-CP-CP to the T-radio access intelligent controller through an R2 interface message (such as R2Indication).
  • R2 interface message such as R2Indication
  • the T-radio access intelligent controller updates its locally stored UE-related context again.
  • the updated UE context information may include updated routing address information.
  • the embodiments of the present application are applied to the handover process in the new RAN architecture. Compared with the application embodiments in FIG. 9 and FIG. 10 , the embodiments of the present application can implement handover service processing across radio access intelligent controllers, and can reduce the number of Signaling interaction between RAN network elements and between RAN network elements and core network elements.
  • FIG. 12 shows a schematic flowchart of a UE transitioning from an inactive state to a connected state according to an embodiment of the present application. As shown in Figure 12:
  • the CU-UP when the UE is in an inactive state, the CU-UP receives downlink data (downlink data, DL data) for the UE.
  • downlink data downlink data, DL data
  • the CU-UP sends a downlink data arrival notification/DL data notification message to the CU-CP through the E1 interface.
  • the CU-CP initiates paging/Paging for the UE.
  • the DU starts to page the UE within its service area.
  • the UE after receiving the paging message of the DU, the UE sends an RRC resume request/RRC resume request to the DU.
  • the DU after receiving the request from the UE, the DU sends an Initial UL RRC message transfer to the CU-CP to request to obtain the UE's upper and lower information.
  • the CU-CP sends a first message to the intelligent radio access controller, for requesting to acquire the context of the UE.
  • the CU-CP can request the wireless access intelligent controller to obtain the context of the UE through the R2 interface message (such as R2 indication), and the message can carry the RRC resume request indication.
  • the RRC resume request indication is used to indicate the request type of the UE, and request to obtain the context of the UE.
  • the intelligent radio access controller performs access control on the UE according to the access control policy.
  • the intelligent radio access controller restores the UE context on the corresponding network element according to the locally saved UE context.
  • the access control policy may include information such as UE blacklist and user limit (for example, judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE exceeds the set user limit after access, etc.).
  • the UE context may include information such as UE identity, service QoS, session information (eg, user plane tunnel/bearer routing information, session identity, etc.).
  • the intelligent radio access controller sends a second message to the CU-CP, instructing the CU-CP to allocate resources for the UE.
  • the radio access intelligent controller can instruct the CU-CP to allocate resources for the UE through an R2 interface message (such as an R2 control message) and create local context information, that is, it can send an R2 control message to the CU-CP, and the message carries the permission Access indication information (such as AC permission) and UE context description/UE context and other information.
  • an R2 interface message such as an R2 control message
  • create local context information that is, it can send an R2 control message to the CU-CP
  • the message carries the permission Access indication information (such as AC permission) and UE context description/UE context and other information.
  • the CU-CP sends a UE context setup request request message to the DU, requesting the DU to allocate resources for the UE and create an F1 interface bearer.
  • the CU-CP sends the RRC configuration information for the UE to the DU, that is, sends an RRC message transfer message to the DU.
  • the DU forwards the RRC configuration information of the CU-CP to the UE to restore the RRC connection.
  • the DU sends the configuration completion confirmation information of the UE to the CU-CP through the UL RRC message transfer message.
  • the CU-CP after the CU-CP receives the confirmation message from the UE, the CU-CP sends a bearer context setup request request message to the CU-UP, requesting the CU-UP to allocate resources for the UE and restore the E1 interface bearer.
  • the CU-CP sends a third message to the radio access intelligent controller, where the message may carry the UE context information updated by the CU-CP.
  • the message may carry the UE context information updated by the CU-CP.
  • the CU-CP completes the establishment of the related resources of the DU and the CU-UP, it sends the local UE Context of the CU-CP to the radio access intelligent controller through an R2 interface message (such as R2Indication).
  • the radio access intelligent controller updates its locally stored UE-related context based on the UE Context sent by the CU-CP.
  • the updated UE context information may include updated routing address information.
  • the CU-CP exchanges information with the core network element (such as the AMF), for example, sends a path switch request message to the AMF to update the downlink routing address of the user plane.
  • the core network element such as the AMF
  • the embodiments of this application relate to the state transition process of the UE.
  • the radio bearer is deleted, and correspondingly, the CU-CP also deletes the UE context.
  • the embodiment of the present application provides a service processing flow from the INACTIVE to the Connected state of the UE, and the intelligent radio access controller can restore the UE-related information on the CU-CP/CU-UP/DU through the locally saved context information of the UE, There is no need to perform signaling interaction between the CU-CP and the CU-CP that previously served the UE, thereby reducing signaling interaction between network elements and avoiding resource waste.
  • FIG. 13 shows a schematic flowchart of an initial network access of a UE according to an embodiment of the present application. As shown in Figure 13:
  • the access control policy refers to information such as UE blacklist and user number limit (for example, judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE exceeds the set user limit after access, etc.).
  • the policy deployment configuration may be dynamically configured by OAM, or other policy configuration methods, which are not specifically limited in this application.
  • the wireless access intelligent controller sends a first message to the wireless access intelligent controller, which is used for creating and deploying a corresponding AC policy instance in the wireless access intelligent controller.
  • the wireless access intelligent controller creates an AC Policy based on the operator's policy request, and creates and deploys the corresponding AC Policy instance on the wireless access intelligent controller through the R5 interface, that is, sends Create Policy to the wireless access intelligent controller instance message, which carries the AC Policy that needs to be deployed
  • the intelligent radio access controller sends a second message to the CU-CP, which is used for subscribing the access signaling request of the UE to the CU-CP.
  • the wireless access intelligent controller can subscribe the UE's access signaling request to the CU-CP based on the AC policy, and the request can include RRC Setup request and RRC resume Request, and instruct the CU-CP to suspend the service process after reporting the event through INSERT , and wait for the wireless access intelligent controller operation command.
  • the CU-CP monitors the UE's signaling request based on the instruction of the radio access intelligent controller.
  • the DU after receiving the request from the UE, the DU sends an Initial UL RRC message transfer to the CU-CP to forward the RRC establishment request message of the UE.
  • the CU-CP sends a third message to the wireless access intelligent controller, where the message may carry the RRC establishment request message received in S1305.
  • the CU-CP monitors the receipt of the RRC setup request, it reports the UE's RRC setup request request message to the wireless access intelligent controller, that is, sends it to the wireless access intelligent controller through an R2 interface message (such as R2 indication).
  • R2 interface message such as R2 indication.
  • Information report message the message carries RRC setup request.
  • the intelligent radio access controller performs access control on the UE according to the access control policy.
  • the intelligent radio access controller instructs the CU-CP to allocate resources to the UE, and create a relevant context (ie, step S1308 is executed).
  • the access control policy may include information such as UE blacklist and user limit (eg, judging whether the UE is in the blacklist, is not allowed to access the network, or whether the UE exceeds the set user limit after access, etc.).
  • the UE context includes information such as UE identity, service QoS, session information (such as user plane tunnel/bearer routing information, session identity, etc.).
  • the intelligent radio access controller sends a fourth message to the CU-CP, instructing the CU-CP to allocate resources to the UE, and the like.
  • the radio access intelligent controller instructs the CU-CP to allocate resources for the UE through an R2 interface message (such as an R2 control message), and creates local context information, that is, sends an R2 control message to the CU-CP, and the message carries the access permission.
  • R2 interface message such as an R2 control message
  • the message carries the access permission.
  • Indication information such as AC permission
  • the CU-CP sends the RRC configuration information for the UE to the DU, that is, sends a DL RRC message transfer message to the DU.
  • the DU forwards the RRC configuration information of the CU-CP to the UE to create an RRC connection, that is, sends an RRC setup request message to the UE.
  • the UE after the UE completes the RRC configuration, it replies with an RRC setup complete message to confirm that the RRC configuration is completed.
  • the RRC setup complete message may carry the UE's NAS request (such as Registration NAS).
  • the DU sends the configuration completion confirmation information of the UE to the CU-CP through the UL RRC message transfer message.
  • the embodiments of the present application are applied to the initial network access scenario of the UE in the new RAN architecture, and the radio access intelligent controller determines whether to allow the UE to access the target network according to the AC policy, which can enhance the centralized control function of the RAN network and avoid the UE and multiple The mental interaction between each network element reduces the waste of resources.
  • FIG. 14 shows a schematic diagram of an apparatus for mobility management according to an embodiment of the present application.
  • the apparatus 1400 includes a first receiving module 1401 and a first processing module 1402 .
  • the apparatus 1400 may be configured to implement the function of providing network selection information by the first network device involved in any of the foregoing method embodiments.
  • the apparatus 1400 may be a wireless access intelligence controller.
  • the apparatus 1400 may process messages as the first network device, and execute the steps of processing the request messages of other network devices by the first network device in the foregoing method embodiments.
  • the first receiving module 1401 can be used to support the apparatus 1400 to communicate, for example, to perform the receiving actions performed by the first network device in FIG. 5 to FIG. 8
  • the first processing module 1402 can be used to support the apparatus 1400 to perform the above method.
  • the processing actions in , for example, perform the processing actions performed by the first network device in FIGS. 5 to 8 . Specifically, refer to the following description:
  • the first receiving module is configured to receive a first message, where the first message includes information used to indicate the target cell; the first processing module is configured to determine whether to allow the terminal device to access the target cell according to at least one of the following information:
  • the target cell the context information of the terminal equipment, the resource status information of the target cell.
  • the first message includes a measurement report of the terminal device, or the first message includes an identifier of the target cell.
  • the apparatus further includes: a first sending module configured to send a second message, where the second message is used to initiate a handover procedure to the target cell.
  • a first sending module configured to send a second message, where the second message is used to initiate a handover procedure to the target cell.
  • the first processing module is further configured to: determine the target cell according to the measurement report of the terminal device.
  • the first sending module is specifically configured to: send the second message to a second network device, where the second network device is a network device serving the target cell.
  • the first sending module is further configured to: send a third message to a third network device, where the third message includes information that the terminal device switches to the target cell, and the third network device is A network device serving a source cell, wherein the source cell is a cell to which the terminal device is connected before a handover process occurs.
  • the first sending module is specifically configured to: send the second message to a fourth network device, where the fourth network device is a network device serving a source cell, where the source cell is the terminal The cell to which the device was connected before the handover procedure occurred.
  • the first sending module is further configured to: send a fourth message, where the fourth message is used to request to acquire the context information of the terminal device; the first receiving module is further configured to: receive the information of the terminal device. contextual information.
  • the first receiving module is further configured to: receive a fifth message, where the fifth message is used by the apparatus to update the context information of the terminal device.
  • the first processing module is further configured to: determine whether to allow the terminal device to access the target cell according to an access control policy.
  • the first receiving module is further configured to: receive a sixth message, where the sixth message includes an access control AC policy.
  • FIG. 15 shows a schematic diagram of an apparatus for mobility management according to an embodiment of the present application.
  • the apparatus 1500 includes a second receiving module 1501 , a second processing module 1502 , and a second sending module 1503 .
  • the apparatus 1500 may be used to implement the function of the second network device involved in any of the foregoing method embodiments.
  • the apparatus 1500 may be a wireless access intelligence controller.
  • the apparatus 1500 may process the message as the second network device, and execute the steps of processing the measurement report by the second network device in the foregoing method embodiment.
  • the second receiving module 1501 and the second sending module 1503 can be used to support the apparatus 1500 to communicate, for example, to perform the sending/receiving actions performed by the second network device in FIG. 5 to FIG. 8 .
  • the second processing module 1502 can be used to support the apparatus 1500 to perform the processing actions in the above method, for example, perform the processing actions performed by the second network device in FIGS. 5 to 8 . Specifically, refer to the following description:
  • a second receiving module configured to receive a first message, where the first message includes a measurement report of the terminal device; a second processing module, configured to determine a target cell to be accessed by the terminal device according to the first message; The second processing module is further configured to: determine that the target cell exceeds the service range of the second network device, and a second sending module is configured to send a second message to the first network device, where the second message includes the The identifier of the target cell, wherein the service range of the first network device covers the target cell.
  • the second receiving module is further configured to: receive a third message, where the third message includes information that the terminal device switches to the target cell; the second sending module is further configured to: send the first Four messages, where the fourth message includes information that the terminal device switches to the target cell.
  • FIG. 16 shows a schematic diagram of an apparatus for mobility management according to an embodiment of the present application.
  • the apparatus 1600 includes a third sending module 1601 and a third receiving module 1602 .
  • the apparatus 1600 may be used to implement the function of initiating a handover process involved in any of the foregoing method embodiments.
  • the apparatus 1600 may be a base station or a network device of a serving cell.
  • the apparatus 1600 may process the message as a third network device, and execute the steps of initiating a handover process to the target cell in the above method embodiments.
  • the third sending module 1601 and the third receiving module 1602 can be used to support the apparatus 1600 to communicate, for example, to perform the sending/receiving actions performed by the terminal device in FIG. 5 to FIG. 8 . Specifically, refer to the following description:
  • a third sending module configured to send a first message, where the first message includes a measurement report of the terminal device; a third receiving module, configured to receive a second message, where the second message includes an identifier of a target cell, and the target The cell is the cell to be accessed by the terminal device; the third sending module is further configured to: send a third message, where the third message is used to initiate a handover procedure to the target cell.
  • FIG. 17 shows a schematic diagram of an apparatus for mobility management according to an embodiment of the present application.
  • the apparatus 1700 includes a fourth receiving module 1701 and a fourth processing module 1702 .
  • the apparatus 1700 can be used to implement the function of determining whether a terminal device is allowed to access the target cell involved in any of the above method embodiments.
  • the apparatus 1700 may be a wireless access intelligence controller.
  • the apparatus 1700 may process the message as the fourth network device, and perform the steps of determining whether to allow the terminal device to access the target cell in the foregoing method embodiment.
  • the fourth receiving module 1701 can be used to support the apparatus 1600 to communicate, for example, to perform the sending/receiving actions performed by the terminal device in FIG. 5 to FIG. 8 .
  • the fourth processing module 1702 can be configured to support the apparatus 1700 to perform the processing actions in the above method, for example, perform the processing actions performed by the fourth network device in FIGS. 5 to 8 . Specifically, refer to the following description:
  • a fourth receiving module configured to receive a first message, where the first message includes information used to indicate a target cell
  • a fourth processing module configured to determine whether to allow a terminal device to access the target cell according to an access control policy .
  • the first message is used to request to acquire the context information of the terminal device
  • the apparatus further includes: a fourth sending module, configured to send a second message, where the second message includes the context information of the terminal device. contextual information.
  • the fourth receiving module is further configured to: receive a third message, where the third message is used by the apparatus to update the context information of the terminal device.
  • the first message is used to request access to the target cell.
  • the apparatus further includes: a fifth sending module, configured to send a fourth message, where the fourth message is used to instruct the network device in the target cell to report an access request to the device.
  • a fifth sending module configured to send a fourth message, where the fourth message is used to instruct the network device in the target cell to report an access request to the device.
  • the fourth sending module or the fifth sending module is further configured to send a fifth message, where the fifth message includes information allowing the terminal device to access the target cell.
  • the fourth receiving module is further configured to: receive a sixth message, where the sixth message includes the access control AC policy.
  • FIG. 18 shows another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • the communication apparatus 1800 can be used to implement the method related to the first network device described in the above method embodiments.
  • the communication apparatus 1800 may be a chip or a network device.
  • the communication device 1800 includes one or more processors 1801 that can support the communication device 1800 to implement the mobility management methods in FIGS. 5 to 8 .
  • the processor 1801 may be a general purpose processor or a special purpose processor.
  • the processor 1801 may be a central processing unit (CPU) or a baseband processor.
  • the baseband processor may be used to process communication data, and the CPU may be used to control communication devices (eg, network equipment, terminal equipment, or chips), execute software programs, and process data of software programs.
  • the communication device 1800 may further include a transceiving unit 1805 to implement signal input (reception) and output (transmission).
  • the communication apparatus 1800 may be a chip, and the transceiver unit 1805 may be an input and/or output circuit of the chip, or the transceiver unit 1805 may be a communication interface of the chip, and the chip may be used as a terminal device or a network device or other wireless communication components of the device.
  • the communication device 1800 may include one or more memories 1802 on which a program 1804 is stored, and the program 1804 can be executed by the processor 1801 to generate instructions 1803, so that the processor 1801 executes the method described in the above method embodiments according to the instruction 1803.
  • data may also be stored in the memory 1802 .
  • the processor 1801 may also read data stored in the memory 1802 , and the data may be stored at the same storage address as the program 1804 , or the data may be stored at a different storage address from the program 1804 .
  • the processor 1801 and the memory 1802 can be provided separately, or can be integrated together, for example, integrated on a single board or a system on chip (system on chip, SOC).
  • SOC system on chip
  • the communication device 1800 may further include a transceiver unit 1805 .
  • the transceiver unit 1805 may be referred to as a transceiver, a transceiver circuit, or a transceiver.
  • the steps in the above method embodiments may be implemented by logic circuits in the form of hardware or instructions in the form of software in the processor 1801 .
  • the processor 1801 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , for example, discrete gates, transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • FIG. 19 shows another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • the communication apparatus 1900 can be used to implement the method related to the first network device described in the above method embodiments.
  • the communication apparatus 1900 may be a chip or a network device.
  • the communication device 1900 includes one or more processors 1901 that can support the communication device 1900 to implement the mobility management methods in FIGS. 5 to 8 .
  • the processor 1901 may be a general purpose processor or a special purpose processor.
  • the processor 1901 may be a central processing unit (CPU) or a baseband processor.
  • the baseband processor may be used to process communication data, and the CPU may be used to control communication devices (eg, network equipment, terminal equipment, or chips), execute software programs, and process data of software programs.
  • the communication device 1900 may further include a transceiving unit 1905 to implement signal input (reception) and output (transmission).
  • the communication device 1900 may be a chip, and the transceiver unit 1905 may be an input and/or output circuit of the chip, or the transceiver unit 1905 may be a communication interface of the chip, and the chip may serve as a terminal device or a network device or other wireless communication components of the device.
  • the communication device 1900 may include one or more memories 1902 on which a program 1904 is stored.
  • the program 1904 can be executed by the processor 1901 to generate instructions 1903, so that the processor 1901 executes the methods described in the above method embodiments according to the instructions 1903.
  • data may also be stored in the memory 1902 .
  • the processor 1901 may also read data stored in the memory 1902 , the data may be stored at the same storage address as the program 1904 , or the data may be stored at a different storage address from the program 1904 .
  • the processor 1901 and the memory 1902 can be provided separately or integrated together, for example, integrated on a single board or a system on chip (system on chip, SOC).
  • SOC system on chip
  • the communication device 1900 may further include a transceiver unit 1905 .
  • the transceiver unit 1905 may be referred to as a transceiver, a transceiver circuit, or a transceiver.
  • the steps in the above method embodiments may be implemented by logic circuits in the form of hardware or instructions in the form of software in the processor 1901 .
  • the processor 1901 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , for example, discrete gates, transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • FIG. 20 shows another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • the communication apparatus 2000 can be used to implement the method for the first network device described in the foregoing method embodiments.
  • the communication apparatus 2000 may be a chip or a network device.
  • the communication device 2000 includes one or more processors 2001 that can support the communication device 2000 to implement the mobility management methods in FIGS. 5 to 8 .
  • the processor 2001 may be a general purpose processor or a special purpose processor.
  • the processor 2001 may be a central processing unit (CPU) or a baseband processor.
  • the baseband processor may be used to process communication data, and the CPU may be used to control communication devices (eg, network equipment, terminal equipment, or chips), execute software programs, and process data of software programs.
  • the communication device 2000 may further include a transceiving unit 2005 to implement signal input (reception) and output (transmission).
  • the communication apparatus 2000 may be a chip, and the transceiver unit 2005 may be an input and/or output circuit of the chip, or the transceiver unit 2005 may be a communication interface of the chip, and the chip may be used as a terminal device or a network device or other wireless communication components of the device.
  • the communication device 2000 may include one or more memories 2002 on which programs 2004 are stored.
  • the program 2004 can be executed by the processor 2001 to generate instructions 2003, so that the processor 2001 executes the methods described in the above method embodiments according to the instructions 2003.
  • data may also be stored in the memory 2002 .
  • the processor 2001 can also read data stored in the memory 2002 , the data can be stored in the same storage address as the program 2004 , or the data can be stored in a different storage address with the program 2004 .
  • the processor 2001 and the memory 2002 may be provided separately or integrated together, for example, integrated on a single board or a system on chip (system on chip, SOC).
  • SOC system on chip
  • the communication apparatus 2000 may further include a transceiver unit 2005 .
  • the transceiver unit 2005 may be referred to as a transceiver, a transceiver circuit, or a transceiver.
  • the steps in the above method embodiments may be implemented by logic circuits in the form of hardware or instructions in the form of software in the processor 2001 .
  • the processor 2001 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , for example, discrete gates, transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • FIG. 21 shows another schematic structural diagram of a mobility management apparatus according to an embodiment of the present application.
  • the communication apparatus 2100 can be used to implement the method for the first network device described in the foregoing method embodiments.
  • the communication apparatus 2100 may be a chip or a network device.
  • the communication device 2100 includes one or more processors 2101 that can support the communication device 2100 to implement the mobility management methods in FIGS. 5 to 8 .
  • the processor 2101 may be a general purpose processor or a special purpose processor.
  • the processor 2101 may be a central processing unit (CPU) or a baseband processor.
  • the baseband processor may be used to process communication data, and the CPU may be used to control communication devices (eg, network equipment, terminal equipment, or chips), execute software programs, and process data of software programs.
  • the communication device 2100 may further include a transceiving unit 2105 to implement signal input (reception) and output (transmission).
  • the communication device 2100 can be a chip, and the transceiver unit 2105 can be an input and/or output circuit of the chip, or the transceiver unit 2105 can be a communication interface of the chip, and the chip can be used as a terminal device or a network device or other wireless communication components of the device.
  • the communication device 2100 may include one or more memories 2102 on which a program 2104 is stored, and the program 2104 can be executed by the processor 2101 to generate instructions 2103, so that the processor 2101 executes the method described in the above method embodiments according to the instructions 2103.
  • data may also be stored in the memory 2102 .
  • the processor 2101 may also read data stored in the memory 2102 , the data may be stored at the same storage address as the program 2104 , or the data may be stored at a different storage address from the program 2104 .
  • the processor 2101 and the memory 2102 may be provided separately, or may be integrated together, for example, integrated on a single board or a system on chip (system on chip, SOC).
  • SOC system on chip
  • the communication device 2100 may further include a transceiver unit 2105 .
  • the transceiver unit 2105 may be referred to as a transceiver, a transceiver circuit, or a transceiver.
  • the steps in the above method embodiments may be implemented by logic circuits in the form of hardware or instructions in the form of software in the processor 2101 .
  • the processor 2101 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , for example, discrete gates, transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods in the embodiments of the present application are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium.
  • the technical solutions or technical solutions of the present application are A part may be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the various embodiments of the present application. all or part of the steps of the method.
  • the storage medium includes at least: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供了一种移动性管理方法，该方法包括：第一网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息；所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：所述终端设备的上下文信息，所述目标小区的资源状态信息。通过利用包括多个小区的资源状态信息和/或终端设备的上下文信息，来确定是否允许终端设备接入小区，从而可以在终端设备接入目标小区之前作出判断，继而提高接入的成功率，避免资源浪费，同时实现了对多个小区的集中控制。

Description

一种移动性管理方法和装置
本申请要求于2020年08月18日提交中国专利局、申请号为202010830207.7、申请名称为“一种移动性管理方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种移动性管理方法和装置。
背景技术
随着无线网络技术的发展，自动化、智能化已被认为是无线网络未来发展的重要方向，业界对无线网络的智能化已有较多研究和探索包括基于人工智能/机器学习(artificial intelligence/machine learning，AI/ML)等技术对RAN网络进行重构，开放无线网络的接口和功能，实现无线网络的自动化和智能化。
目前，在5G RAN网络的架构中，gNB-CU-CP可以实现无线资源控制(radio resource control，RRC)和分组数据汇聚层协议控制面的(packet data convergence protocol-control plane，PDCP-C)协议的功能，其中RRC协议层的主要功能包括移动性管理(mobility management)、接入控制(access control)等功能。
无线网络管理功能(radio resource management，RRM)主要包括无线准入控制(radio admission control)，连接移动性管理(connection mobility control)等。目前的RRM主要功能(包括接入控制、移动性管理等)都是由gNB-CU-CP来执行的。
但是由于gNB-CU-CP不能感知gNB-DU和gNB-CU-UP的可用资源状态信息，因此在移动性管理过程中，可能会由于资源受限导致目标小区(如target-gNB-CU-UP和target-gNB-DU)为UE分配资源操作失败，进而导致UE接入或切换失败。针对上述的问题，目前还没有提出比较好的解决方案。
发明内容
本申请提供一种移动性管理方法，通过利用包括多个小区的资源状态信息、终端设备的上下文信息，来确定是否允许终端设备接入小区，从而可以在终端设备接入目标小区之前作出判断，继而提高接入的成功率，避免资源浪费，同时实现了对多个小区的集中控制。
第一方面，提供了一种移动性管理方法，该方法包括：第一网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息；所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：所述终端设备的上下文信息，所述目标小区的资源状态信息。
通过根据终端设备的上下文信息、目标小区的资源状态信息，来确定是否允许终端设备接入小区，从而可以在终端设备接入目标小区之前作出判断，继而提高接入的成功率， 避免资源浪费。
可选地，该第一网络设备可以为无线接入网架构中的无线接入智能控制器。
可选地，无线接入智能控制器的功能可以包括切换决策、接入控制决策等功能。
结合第一方面，在第一方面的某些实现方式中，所述第一消息包括所述终端设备的测量报告，或者，所述第一消息包括所述目标小区的标识。
通过接收终端设备的测量报告或者目标小区的标识，第一网络设备可以确定是否允许终端设备接入，其中，可选地，当目标小区不属于当前为终端设备服务的小区的无线接入智能控制器时，该无线接入智能控制器可以在作出切换决策并确定目标小区之后，向第一网络设备发送目标小区的标识，如此，第一网络设备可以实现在不同的无线接入智能控制器之间实现业务切换，且可以减少RAN网元之间以及RAN网元与核心网网元之间的信令交互，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
第一网络设备在确定允许接入目标小区之后，可以发送消息，请求在目标小区中进行切换。
应理解，上述第一网络设备发送的第二消息是用于向目标小区发起切换流程，而不是将第二消息发送给目标小区，可选地，此处的第二消息可以是发送给服务该目标小区的基站或网络设备，或者也可以是服务其他小区的基站或网络设备，服务该目标小区或其他小区的基站或网络设备可以在收到第二消息之后，发起终端设备与目标小区之间的切换流程。
结合第一方面，在第一方面的某些实现方式中，当所述第一消息包括所述终端设备的测量报告时，所述方法还包括：所述第一网络设备根据所述终端设的测量报告，确定所述目标小区。
第一网络设备可以根据接收到的测量报告中的信息，判断是否进行切换，并进一步确定目标小区。
结合第一方面，在第一方面的某些实现方式中，所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：所述第一网络设备向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的无线网络设备。可选地，所述无线网络设备可以是RAN功能网元设备，如gNB(gNodeB)、集中单元控制面(centralized unit-control plane，CU-CP)、集中单元用户面(centralized unit-user plane，CU-UP)或分布式单元(distributed unit，DU)。
可选地，第一网络设备在确定接入目标小区之后，可以直接向服务目标小区的无线网络设备发送切换请求，由于第一网络设备在发送请求之前已经根据无线网络设备的资源状态或者终端设备的上下文信息进行判断，因此，可以保证目标小区成功完成切换流程，继而提高了切换的成功率，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一网络设备向第三网络设备发送第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
结合第一方面，在第一方面的某些实现方式中，所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：所述第一网络设备向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的无线网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
可选地，第一网络设备在确定接入目标小区之后，可以将确认的目标小区的信息发送给为终端设备服务的源小区，使得源小区可以根据目标小区的信息，向目标小区发起切换流程，由于第一网络设备在发送消息之前已经根据无线网络设备的资源状态或者终端设备的上下文信息进行判断，因此，可以保证目标小区成功完成切换流程，继而提高了切换的成功率，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一网络设备发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；所述第一网络设备接收所述终端设备的上下文信息。
可选地，当第一网络设备本地没有保存终端设备的上下文信息时，第一网络设备可以向为源小区服务的网络设备发送请求，请求获取终端设备的上下文信息，使得第一网络设备可以进一步根据终端设备的上下文信息判断是否允许终端设备接入目标小区，从而提高了切换的成功率，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一网络设备接收第五消息，所述第五消息用于所述第一网络设备更新所述终端设备的上下文信息。
可选地，第一网络设备可以接收终端设备发生小区切换之后的更新的上下文信息，如切换之后的RRC配置、路由信息等，从而使得第一网络设备可以根据最新的上下文信息来判断是否允许终端设备接入目标小区，继而提高了切换的成功率，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区还包括：所述第一网络设备根据接入控制策略确定是否允许终端设备接入所述目标小区。
可选地，除终端设备的上下文信息、目标小区的资源状态信息之外，第一网络设备还可以根据接入控制策略进一步判断是否允许终端设备接入所述目标小区，从而提高了切换的成功率，减少了资源浪费。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一网络设备接收第六消息，所述第六消息包括接入控制AC策略。
通过接收接入控制策略，使得第一网络设备可以根据接入控制策略对是否允许终端设备接入小区做进一步的判断，从而提高了切换的成功率，减少了资源浪费。
第二方面，提供了一种移动性管理方法，该方法包括：第二网络设备接收第一消息，所述第一消息包括终端设备的测量报告；所述第二网络设备根据所述第一消息，确定所述终端设备待接入的目标小区；所述第二网络设备确定所述目标小区超过所述第二网络设备的服务范围；所述第二网络设备向第一网络设备发送第二消息，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
可选地，该第二网络设备可以是管理为终端设备提供服务的源小区的无线接入智能控制器，此时，第二网络设备可以向管理目标小区的无线接入智能控制器发送包括目标小区信息的消息。
在切换过程中，若第二网络设备发现目标小区超过自身的服务范围，那么第二网络设备可以根据本地配置的信息，确定该目标小区对应的无线接入智能控制器，并向该无线接入智能控制器发送该目标小区的信息，从而可以进一步让该无线接入智能控制器发起在目标小区的切换流程，实现了跨无线接入智能控制器的业务切换过程，从而提高了切换的成功率，减少了资源浪费。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二网络设备接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；所述第二网络设备发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
第三方面，提供了一种移动性管理方法，该方法包括：第三网络设备发送第一消息，所述第一消息包括终端设备的测量报告；所述第三网络设备接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区；所述第三网络设备发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
第四方面，提供了一种移动性管理方法，该方法包括：第四网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息；所述第四网络设备根据接入控制策略，确定是否允许终端设备接入所述目标小区。
可选地，上述第四网络设备可以为服务范围覆盖目标小区的无线接入智能控制器。
在终端设备接入目标小区之前，第四网络设备可以根据接入控制策略进行集中判断，避免了终端设备和目标小区之间的大量接入控制过程，从而可以减少无线网络各个网元之间的信令交互，减少了资源浪费，同时，提高了网络的集中控制能力。
结合第四方面，在第四方面的某些实现方式中，所述第一消息用于请求获取所述终端设备的上下文信息，所述方法还包括：所述第四网络设备发送第二消息，所述第二消息包括所述终端设备的上下文信息。
可选地，当终端设备处于去激活状态(inactive)，并想要恢复到连接态(connected)时，目标小区的网元需要恢复终端设备的上下文信息，本申请可以通过第四网络设备对该终端设备进行接入控制，并在确定允许其接入目标小区后，向目标小区的网元发送该终端设备的上下文信息，从而可以避免目标小区的网络设备向之前为终端设备服务的小区的网络设备发送请求，来获取上下文信息，本申请的方法可以基于第四网络设备本地保存的上下文信息恢复目标小区的网元上的UE相关信息，从而减少了网元之间的信令交互，减少了资源浪费。
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述第四网络设备接收第三消息，所述第三消息用于所述第四网络设备更新所述终端设备的上下文信息。
可选地，第四网络设备可以接收更新后的UE的上下文信息，从而可以根据更新的上下文信息，更为准确的对终端设备进行接入控制。
结合第四方面，在第四方面的某些实现方式中，所述第一消息用于请求接入所述目标小区。
可选地，当终端设备初始入网时，第四网络设备可以根据接入控制策略，确定允许所述终端设备接入所述目标小区。本申请的方法可以根据接入控制策略进行集中判断，避免了终端设备和目标小区之间的大量接入控制过程，从而可以减少无线网络各个网元之间的信令交互，减少了资源浪费，同时，提高了网络的集中控制能力。
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述第四网络设备发送第四消息，所述第四消息用于指示所述目标小区中的网络设备在接收到接入请求时，上报给所述第四网络设备。
通过指示目标小区的网络设备在接收到接入请求时上报给第四网络设备，使得第四网络设备可以对位于其服务范围内的小区进行集中的控制，从而可以减少无线网络各个网元之间的信令交互，减少了资源浪费，同时，提高了网络的集中控制能力。
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述第四网络设备发送第五消息，所述第五消息包括允许所述终端设备接入所述目标小区的信息。
第四网络设备在确定允许终端设备接入目标小区之后，可以向目标小区的发送消息，指示目标小区与终端设备之间完成接入。
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述第四网络设备接收第六消息，所述第六消息包括所述接入控制AC策略。
通过接收接入控制策略，使得第四网络设备可以基于接入控制策略执行接入控制过程，与5G RAN相比，可以将5G RAN的接入控制功能从CP上解耦，实现开放无线接入网络的集中控制。
第五方面，提供了一种移动性管理的装置，该装置包括：第一接收模块，用于接收第一消息，所述第一消息包括用于指示目标小区的信息；第一处理模块，用于根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：所述终端设备的上下文信息，所述目标小区的资源状态信息。
结合第五方面，在第五方面的某些实现方式中，所述第一消息包括所述终端设备的测量报告，或者，所述第一消息包括所述目标小区的标识。
结合第五方面，在第五方面的某些实现方式中，所述装置还包括：第一发送模块，用于发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
结合第五方面，在第五方面的某些实现方式中，当所述第一消息包括所述终端设备的测量报告时，所述第一处理模块还用于：根据所述终端设的测量报告，确定所述目标小区。
结合第五方面，在第五方面的某些实现方式中，所述第一发送模块具体用于：向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的网络设备。
结合第五方面，在第五方面的某些实现方式中，所述第一发送模块还用于：向第三网络设备发送第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
结合第五方面，在第五方面的某些实现方式中，所述第一发送模块具体用于：向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
结合第五方面，在第五方面的某些实现方式中，第一发送模块还用于：发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；所述第一接收模块还用于：接收所述终端设备的上下文信息。
结合第五方面，在第五方面的某些实现方式中，所述第一接收模块还用于：接收第五消息，所述第五消息用于所述装置更新所述终端设备的上下文信息。
结合第五方面，在第五方面的某些实现方式中，所述第一处理模块还用于：根据接入控制策略确定是否允许终端设备接入所述目标小区。
结合第五方面，在第五方面的某些实现方式中，所述第一接收模块还用于：接收第六消息，所述第六消息包括接入控制AC策略。
第六方面，提供了一种移动性管理的装置，该装置包括：第二接收模块，用于接收第一消息，所述第一消息包括终端设备的测量报告；第二处理模块，用于根据所述第一消息，确定所述终端设备待接入的目标小区；所述第二处理模块还用于：确定所述目标小区超过所述第二网络设备的服务范围；第二发送模块，用于向第一网络设备发送第二消息，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
结合第六方面，在第六方面的某些实现方式中，所述第二接收模块还用于：接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；所述第二发送模块还用于：发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
第七方面，提供了一种移动性管理的装置，该装置包括：第三发送模块，用于发送第一消息，所述第一消息包括终端设备的测量报告；第三接收模块，用于接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区；所述第三发送模块还用于：发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
第八方面，提供了一种移动性管理的装置，该装置包括：第四接收模块，用于接收第一消息，所述第一消息包括用于指示目标小区的信息；第四处理模块，用于根据接入控制策略，确定是否允许终端设备接入所述目标小区。
结合第八方面，在第八方面的某些实现方式中，所述第一消息用于请求获取所述终端设备的上下文信息，所述装置还包括：第四发送模块，用于发送第二消息，所述第二消息包括所述终端设备的上下文信息。
结合第八方面，在第八方面的某些实现方式中，所述第四接收模块还用于：接收第三消息，所述第三消息用于所述装置更新所述终端设备的上下文信息。
结合第八方面，在第八方面的某些实现方式中，所述第一消息用于请求接入所述目标小区。
结合第八方面，在第八方面的某些实现方式中，所述装置还包括：第五发送模块，用于发送第四消息，所述第四消息用于指示所述目标小区中的网络设备在接收到接入请求时，上报给所述装置。
结合第八方面，在第八方面的某些实现方式中，所述第四发送模块或第五发送模块还用于：发送第五消息，所述第五消息包括允许所述终端设备接入所述目标小区的信息。
结合第八方面，在第八方面的某些实现方式中，所述第四接收模块还用于：接收第六消息，所述第六消息包括所述接入控制AC策略。
第九方面，提供了一种通信装置，该通信装置具有实现上述各个方面所述的方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十方面，提供了一种通信装置，包括：处理器；所述处理器用于与存储器耦合，用于从所述存储器中调用并运行计算机程序，以执行上述各个方面或各个方面的任意可能的 实现方式中的方法。
第十一方面，提供了一种通信装置，包括，处理器，存储器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信设备执行上述各个方面或各个方面的任意可能的实现方式中的方法。
第十二方面，提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持通信装置实现上述各个方面中所涉及的功能。在一种可能的设计中，该装置还包括存储器，该存储器，用于保存通信装置必要的程序指令和数据。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
第十三方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序包括用于执行如上述各个方面或各个方面的任意可能的实现方式中的方法的指令。
第十四方面，提供了一种计算机程序产品，包括计算机程序，当其在计算机设备上运行时，使得所述计算机设备执行如上述各个方面所述的方法。
第十五方面，提供了一种通信系统，该通信系统包括第一网络设备、第二网络设备、第三网络设备、第四网络设备；该第一网络设备用于执行上述第一方面，或者本申请实施例提供的方案中由第一网络设备执行的步骤；第二网络设备用于执行上述第二方面中，或者本申请实施例提供的方案中由第二网络设备执行的步骤；第三网络设备用于执行上述第三方面中，或者本申请实施例提供的方案中由第三网络设备执行的步骤；第四网络设备用于执行上述第四方面中，或者本申请实施例提供的方案中由第四网络设备执行的步骤。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1是一种新型RAN系统架构示意图。
图2是5G RAN系统架构中的协议功能示意图。
图3是5G RAN系统架构中的RRM功能示意图。
图4是UE切换流程示意图。
图5是本申请实施例的一个移动性管理方法的示意图。
图6是本申请实施例的另一个移动性管理方法的示意图。
图7是本申请实施例的另一个移动性管理方法的示意图。
图8是本申请实施例的另一个移动性管理方法的示意图。
图9是本申请实施例的一个UE发生切换的流程示意图。
图10是本申请实施例的另一个UE发生切换的流程示意图。
图11是本申请实施例的另一个UE发生切换的流程示意图。
图12是本申请实施例的一个UE从去激活状态转换为连接态的流程示意图。
图13是本申请实施例的一个UE初始入网的流程示意图。
图14是本申请实施例的一个移动性管理的装置的示意图。
图15是本申请实施例的另一个移动性管理的装置的示意图。
图16是本申请实施例的另一个移动性管理的装置的示意图。
图17是本申请实施例的另一个移动性管理的装置的示意图。
图18是本申请实施例的一种移动性管理装置的另一结构示意图。
图19是本申请实施例的一种移动性管理装置的另一结构示意图。
图20是本申请实施例的一种移动性管理装置的另一结构示意图。
图21是本申请实施例的一种移动性管理装置的另一结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统或新无线(new radio，NR)，以及未来演进的通信系统等。
本申请实施例中的终端设备可以是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等。所述终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。终端设备有时也可以称为用户设备(user equipment，UE)、移动台和远方站等，本申请的实施例对终端设备所采用的具体技术、设备形态以及名称不做限定。
本申请实施例中的网络设备可以包括长期演进(long term evolution，LTE)系统或演进的LTE系统(LTE-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，如传统的宏基站eNB和异构网络场景下的微基站eNB，或者也可以包括第五代移动通信技术(5th generation，5G)新无线(new radio，NR)系统中的下一代节点B(next generation node B，gNB)，或者还可以包括无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、传输接收点(transmission reception point，TRP)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)、基带池BBU pool，或WiFi接入点(access point，AP)等，再或者还可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。 在接入网设备包括CU和DU的分离部署场景中，CU支持无线资源控制(radio resource control，RRC)、分组数据汇聚协议(packet data convergence protocol，PDCP)、业务数据适配协议(service data adaptation protocol，SDAP)等协议；DU主要支持无线链路控制层(radio link control，RLC)、媒体接入控制层(media access control，MAC)和物理层协议。
随着无线网络技术的发展，自动化、智能化已被认为是无线网络未来发展的重要方向，业界对无线网络的智能化已有较多研究和探索，包括基于AI/ML(artificial intelligence/machine learning)等技术对RAN网络进行重构，开放无线网络的接口和功能，实现无线网络的自动化和智能化。如图1所示，新型RAN架构包括的功能有无线接入管理控制器，无线接入智能控制器，CU-CP，CU-UP，DU和RU。无线接入智能控制器，CU-CP，CU-UP，DU和RU可以提供无线网络控制面和用户面的业务功能，无线接入管理控制器与操作、管理和维护(operation，administration and maintenance，OAM)一起可以提供管理面的业务功能理。其中，无线接入智能控制器作为新型RAN控制面功能的集中控制节点，其可以利用AI/ML模型实现对无线网络资源的自动化、智能化管理。
具体地，新型RAN定义的主要功能模块的功能描述如下所述：
无线接入管理控制器：其功能是新型RAN功能网元及资源的时延不敏感控制和优化，执行AI/ML工作流(包括模型训练和更新)以及基于策略实现对应用/特性管理。
无线接入智能控制器：其功能是基于其与新型RAN功能网元之间的接口(如R2\R3\R4)的数据收集和操作指令实现对新型RAN功能网元(如CU-CP等)以及资源的控制和优化。
CU-CP：实现RRC协议和PDCP协议控制面功能；
CU-UP：实现PDCP协议用户面和SDAP协议功能；
DU：实现RLC/MAC/High-PHY的协议功能；
RU：无线单元，实现low-PHY的协议功能以及基于底层拆分RF处理功能；
OAM：提供对新型-RAN功能模块的运维管理。
在目前的5G RAN网络的架构中，如图2所示，gNB-CU-CP可以实现RRC和PDCP-C协议的功能，RRC协议层的主要功能包括移动性管理Mobility management、接入控制Access Control等功能。其中，Mobility management、Access Control等功能属于无线网络管理功能(radio resource management，RRM)的一部分，如图3所示，RRM主要包括无线准入控制Radio Admission Control，连接移动性管理Connection Mobility Control等功能，由此可看出，目前的RRM主要功能(包括接入控制、移动性管理等)都是由gNB-CU-CP来执行的。
但是由于gNB-CU-CP不能感知gNB-DU和gNB-CU-UP的可用资源状态信息，因此，在终端设备请求接入目标小区时，可能会由于资源受限导致target-gNB-CU-UP和target-gNB-DU为UE分配资源操作失败，进而导致UE接入或切换失败。
例如，在5G RAN架构中，以UE切换为例，如图4所示，源小区的源gNB-CU-UP(source-CU-UP，S-CU-UP)可以基于UE的测量报告，决策执行对UE的切换(handover，HO)处理，并进一步确定切换的目标小区或基站，向目标小区或基站的目标CU-UP(target-CU-UP，T-CU-UP)发起切换处理流程。Target-gNB-CU-CP收到切换请求后，执行接入 控制(如基于User/UE黑白名单、用户数等控制策略判断是否允许UE接入目标小区或基站)，若允许UE接入，则发起目标侧网元(如target-gNB-CU-UP和target-gNB-DU)为UE分配资源、创建UE的下文。在这个过程中，Target-gNB-CU-CP收到切换请求后，若允许UE接入，则直接和target-gNB-CU-UP和target-DU进行信令交互，触发相关资源分配等操作。但是，由于gNB-CU-CP并不能感知gNB-DU和gNB-CU-UP的可用资源状态信息，因此可能会由于资源受限导致target-gNB-CU-UP和target-gNB-DU为UE分配资源操作失败，进而导致切换失败，那么对于这种场景，会产生网元间不必要的信令交互，从而浪费网络资源(如Source-gNB-CU-CP和target-gNB-CU-CP以及target-gNB-CU-CP和target-gNB-DU/CU-UP之间信令交互)。
或者，以UE初始入网为例，在5G-RAN架构中，UE接入目标小区时，需要向T-CU-CP发送RRC请求，当有多个UE以及多个小区时，UE与各个T-CU-CP之间会产生大量的信令交互，这势必会造成资源浪费。
针对上述5G-RAN中由gNB-CU-CP执行RRM主要功能带来的问题，如何在之后的新型RAN的应用中进行克服，目前还没有提出比较好的解决方案。
本申请提出了一种移动性管理方法，通过利用包括终端设备的上下文信息、目标小区的资源状态信息，来确定是否允许终端设备接入小区，从而可以在终端设备接入目标小区之前作出判断，继而提高接入的成功率，避免资源浪费，同时实现了对多个小区的集中控制。
如图1示出的本申请实施例应用的新型RAN的系统架构示意图中，无线接入管理控制器的功能是新型RAN功能网元及资源的时延不敏感业务的控制和优化，执行AI/ML工作流(包括模型训练和更新)以及基于策略实现对应用/特性管理。无线接入管理控制器主要提供的是管理面的功能，因此，其是和管理实体共部署；无线接入智能控制器的功能是基于其与新型RAN功能网元之间的接口(如R2\R3\R4)的数据收集和操作指令实现对新型RAN功能网元(如CU-CP等)以及资源的控制和优化；CU-CP实现RRC协议和PDCP协议控制面功能；CU-UP实现PDCP协议用户面和SDAP协议功能；DU实现RLC/MAC/High-PHY的协议功能。
应理解，图1示出的新型RAN系统架构示意图仅为示例，本申请的实施例也可以应用在其它表示新型RAN的系统架构中，本申请对此不作限定。
图5示出了本申请实施例的一个移动性管理方法的示意图。如图5所示，该方法包括步骤S510和S520，下面对这两个步骤进行详细介绍。
S510，第一网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息。
可选地，该第一网络设备可以为无线接入智能控制器，该无线接入智能控制器可以实现对新型RAN功能网元(如CU-CP等)以及资源的控制和优化。
作为一个实施例，所述第一消息可以包括终端设备的测量报告。
可选地，该终端设备的测量报告可以是从服务源小区的基站或网络设备获取的。
可选地，当第一消息包括终端设备的测量报告时，第一网络设备可以根据测量报告确定目标小区，具体地，第一网络设备可以根据测量报告中携带的信息确定当前终端设备是否要切换小区，如果确定切换，则可以进一步根据测量报告中携带的终端设备与多个小区之间的质量信息确定目标小区。
作为另一个实施例，所述第一消息可以包括目标小区的标识。
可选地，第一网络设备也可以直接接收目标小区的标识。
S520，所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：所述终端设备的上下文信息，所述目标小区的资源状态信息。
可选地，第一网络设备可以本地保存有终端设备的上下文信息(如UE标识、业务服务质量(quality of service，QoS)信息、会话信息(如用户面隧道/承载路由信息、会话标识等)，若第一网络设备本地没有保存终端设备的上下文信息，则可以通过其他网络设备获取上下文信息，具体地，所述方法还包括：所述第一网络设备发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；所述第一网络设备接收所述终端设备的上下文信息。
可选地，上述目标小区的资源状态信息可以包括无线控制资源，例如带宽等。
应理解，新型RAN的现有技术已支持无线接入智能控制器基于R2/R3/R4接口监控CU-CP/DU/CU-UP的性能数据(如资源状态信息)，因此本申请基于无线接入智能控制器已经获知了CU-CP/DU/CU-UP的性能数据，在本申请的方案中，无线接入智能控制器能够基于资源状态进行接入控制或确定是否允许终端设备接入目标小区。
可选地，第一网络设备还可以根据接入控制策略，确定是否允许终端设备接入目标小区。
可选地，接入控制策略可以包括：UE黑名单、用户数限制等信息(如判断UE是否在黑名单中，不允许接入网络，或UE接入后是否超过设定的用户数上限等)。
可选地，上述接入控制策略可以是第一网络设备接收的，具体地，所述方法还包括：所述第一网络设备接收第六消息，所述第六消息包括接入控制AC策略。
或者可选地，第一网络设备也可以接收创建策略实例的消息，并创建相应的接入控制策略。
作为一个实施例，第一网络设备确定允许接入目标小区之后，可以继续发送消息，请求发起与目标小区之间的切换流程，具体地，所述方法还包括：所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
应理解，此处的第二消息是用于向目标小区发起切换流程的，其并不表示第二消息是发送给目标小区的，第二消息可以是发送给服务目标小区的基站或网络设备的，或者，第二消息也可以是发送给服务其他小区的基站或网络设备的，而服务目标小区或其他小区的基站和网络设备是可以根据第二消息，发起与目标小区的切换流程的网络设备。
作为一个实施例，第一网络设备在确定目标小区之后，可以直接向服务目标小区的基站或网络设备发送第二消息，从而在目标小区中发起切换流程，具体地，述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：所述第一网络设备向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的网络设备。
可选地，当第一网络设备直接向服务目标小区的基站或网络设备发送第二消息时，为了完成终端设备与目标小区的切换，第一网络设备还可以向源小区(即终端设备发生切换之前连接的小区)发送消息，告知当前终端设备已经切换到目标小区，具体地，所述方法还包括：所述第一网络设备向第三网络设备发送第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述 源小区为所述终端设备发生切换流程之前连接到的小区。
可选地，该第三消息中可以包括切换指示信息(如HO to T-CU-CP indication)和目标RRC信息，其中，HO to T-CU-CP indication可以用于告知服务源小区的网络设备，UE已经切换到目标小区的网络设备。目标RRC信息可以用于告知服务源小区的网络设备发起RRC重配置处理，并将目标RRC信息发送给UE(使UE能够与目标小区建立新的RRC连接)。目标RRC信息可以包括目标小区标识，T-CU-CP/T-CU-UP/T-DU的路由信息等。
可选地，第一网络设备可以在接收到目标小区发送的终端设备已经切换到目标小区的信息之后，向服务源小区的网络设备发送上述第三消息。进一步地，第一网络设备可以根据接收到的目标小区发送的信息，更新终端设备在本地的上下文信息，其中，更新的上下文信息可以包括与目标小区的RRC配置等信息。
作为另一个实施例，第一网络设备在确定目标小区之后，可以向服务其他小区的基站或网络设备发送消息，请求发起切换流程，其中，其他小区可以是终端设备当前连接的小区或者是终端设备发生切换流程之前连接的小区，具体地，所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：所述第一网络设备向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
可选地，该第四消息中可以包括：切换指示信息(如HO to T-CU-CP indication)和目标RRC信息，其中，HO to T-CU-CP indication可以用于告知服务源小区的网络设备，UE已经切换到目标小区的网络设备。目标RRC信息可以用于告知服务源小区的网络设备发起RRC重配置处理，并将目标RRC信息发送给UE(使UE能够与目标小区建立新的RRC连接)。目标RRC信息可以包括目标小区标识，T-CU-CP/T-CU-UP/T-DU的路由信息等。
作为一个实施例，第一网络设备在切换到目标小区之后，可以更新终端设备的上下文信息，具体地，所述方法还包括：所述第一网络设备接收第五消息，所述第五消息用于所述第一网络设备更新所述终端设备的上下文信息。
可选地，第一网络设备更新的终端设备的上下文信息可以包括切换之后的路由地址等信息。
本申请实施例基于多个小区的网络资源状态和/或终端上下文信息的感知，确定是否允许终端设备接入目标小区，避免了网络设备由于资源不足而导致的接入失败，从而减少了RAN网元之间不必要的信令交互，减少了资源浪费，并提高了接入的成功率，同时实现了对多个小区的集中控制。
图6示出了本申请实施例的另一个移动性管理方法的示意图。如图6所示，该方法包括步骤S610至S640，下面对这些步骤进行详细介绍。
S610，第二网络设备接收第一消息，所述第一消息包括终端设备的测量报告。
可选地，第二网络设备可以为无线接入智能控制器。
可选地，该测量报告可以是第二网络设备从服务源小区的网络设备中获取的。
S620，所述第二网络设备根据所述第一消息，确定所述终端设备待接入的目标小区。
可选地，第二网络设备可以根据测量报告中携带的终端设备与多个小区之间的质量信息等确定是否进行切换，并在确定切换时进一步确定待接入的目标小区。
S630，所述第二网络设备确定所述目标小区超过所述第二网络设备的服务范围。
第二网络设备根据测量报告中携带的信息确定待接入的目标小区超出了自己的服务范围。
S640，所述第二网络设备向第一网络设备发送第二消息。
作为一个实施例，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
作为一个实施例，所述方法还包括：所述第二网络设备接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；所述第二网络设备发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
可选地，第四消息可以包括：切换指示信息(如HO to T-CU-CP indication)和目标RRC信息，其中，HO to T-CU-CP indication可以用于告知服务源小区的网络设备，UE已经切换到目标小区的网络设备。目标RRC信息可以用于告知服务源小区的网络设备发起RRC重配置处理，并将目标RRC信息发送给UE(使UE能够与目标小区建立新的RRC连接)。目标RRC信息可以包括目标小区标识，T-CU-CP/T-CU-UP/T-DU的路由信息等。
第二网络设备可以根据接收到的终端设备切换到目标小区的信息，向服务源小区的基站或网络设备发送消息，告知服务源小区的基站或网络设备，终端设备已经完成目标小区的切换。
本申请实施例通过对多个小区的资源状态的感知，确定要接入的目标小区，并在目标小区超出自身的服务范围时，将目标小区的信息发送给其他网络设备，从而使得其他网络设备可以进一步发起对目标小区的切换流程，从而减少了RAN网元之间不必要的信令交互，减少了资源浪费，并提高了接入的成功率，同时实现了对多个小区的集中控制。
图7示出了本申请实施例的另一个移动性管理方法的示意图。如图7所示，该方法包括步骤S710至S730，下面对这些步骤进行详细介绍。
S710，第三网络设备发送第一消息，所述第一消息包括终端设备的测量报告。
可选地，第三网络设备可以为当前为终端设备提供服务的源小区中的基站或网络设备，第三网络设备发送的测量报告可以是从终端设备获取的。
S720，所述第三网络设备接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区。
第三网络设备可以将测量报告发送给其他网络设备，如本申请中的第一网络设备，使得第一网络设备可以根据测量报告确定可以接入目标小区，并从第一网络设备中获取目标小区的信息。
S730，所述第三网络设备发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
本申请实施例通过将接收到的终端设备的测量报告发送给其他设备，如第一网络设备，使得其他设备可以基于测量报告确定目标小区并发送给第三网络设备，避免了第三网络设备(如服务源小区的基站或网络设备)需要基于测量报告确定目标小区，从而避免了后期网络设备由于资源不足而导致的接入失败，从而减少了RAN网元之间不必要的信令交互，减少了资源浪费，并提高了接入的成功率，同时实现了对多个小区的集中控制。
图8示出了本申请实施例的另一个移动性管理方法的示意图。如图8所示，该方法包括步骤S810至S820，下面对这些步骤进行详细介绍。
S810，第四网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息。
可选地，上述第四网络设备可以为服务范围覆盖目标小区的无线接入智能控制器。
作为一个实施例，本申请实施例可以应用于终端设备从去激活态(inactive)转换为连接态(connected)时的场景中。此时，第四网络设备接收的第一消息用于请求获取UE的上下文信息。
作为另一个实施例，本申请实施例可以应用于终端设备初始入网时的场景中，具体地，所述第一消息用于请求接入所述目标小区。
可选地，第四网络设备在接收到接入请求之前，可以向服务小区的多个网络设备或基站发送消息，告知其当接收到接入请求时，上报第四网络设备，具体地，所述第四网络设备发送第四消息，所述第四消息用于指示所述目标小区中的网络设备在接收到接入请求时，上报给所述第四网络设备。
通过指示目标小区的网络设备在接收到接入请求时上报给第四网络设备，使得第四网络设备可以对位于其服务范围内的小区进行集中的控制，从而可以减少无线网络各个网元之间的信令交互，减少了资源浪费，同时，提高了网络的集中控制能力。
S820，所述第四网络设备根据接入控制策略，确定是否允许终端设备接入所述目标小区。
可选地，接入控制策略可以包括：UE黑名单、用户数限制等信息(如判断UE是否在黑名单中，不允许接入网络，或UE接入后是否超过设定的用户数上限等)。
可选地，上述接入控制策略可以是第四网络设备接收的，具体地，所述方法还包括：所述第四网络设备接收第六消息，所述第六消息包括所述接入控制策略。
当处于终端设备从去激活态(inactive)转换为连接态(connected)时的场景时，第四网络设备可以将终端设备的上下文信息发送给服务目标小区的网络设备，具体地，所述第一消息用于请求获取所述终端设备的上下文信息，所述方法还包括：所述第四网络设备发送第二消息，所述第二消息包括所述终端设备的上下文信息。
可选地，第四网络设备可以本地保存有UE的上下文信息，从而在接收到需要获取UE上下文的请求时，发送UE的上下文。从而可以避免服务目标小区的网络设备向之前为终端设备服务的小区的网络设备发送请求，来获取上下文信息，本申请的方法可以基于第四网络设备本地保存的上下文信息恢复目标小区的网元上的UE相关信息，从而减少了网元之间的信令交互，减少了资源浪费。
作为一个实施例，所述方法还包括：所述第四网络设备接收第三消息，所述第三消息用于所述第四网络设备更新所述终端设备的上下文信息。
通过更新第四网络设备上关于终端设备的上下文信息，从而可以根据更新的上下文信息，更为准确的对终端设备进行接入控制。
作为一个实施例，所述方法还包括：所述第四网络设备发送第五消息，所述第五消息包括允许所述终端设备接入所述目标小区的信息。
通过接收接入控制策略，使得第四网络设备可以基于接入控制策略执行接入控制过程，与5G RAN相比，可以将5G RAN的接入控制功能从CP上解耦，实现对多个小区的网络的集中控制，从而减少了RAN网元之间不必要的信令交互，减少了资源浪费。
图9示出了本申请实施例的一个UE发生切换的流程示意图。如图9所示：
S901，UE向源DU(source-DU，S-DU)发送测量报告(Measurement report)。具体地，UE基于网络对其的测量配置进行信号测量，并将测量结果以测量报告发送给S-DU。其中，UE Measurement report可以包括UE标识以及UE测量的RSRP(Reference Signal Received Power，参考信号接收功率)、RSRQ(Reference Signal Received Quality，参考信号接收质量)和RS-SINR(Reference Signal-Signal to Interference plus Noise Ratio，参考信号干扰噪声比)。
S902，S-DU向源CU-CP(source CU-CP，S-CU-CP)发送上行RRC消息，其中可以携带在S901中接收到的测量报告。
S901和S902属于现有技术，具体过程请参考现有技术。
S903，S-CU-CP向无线接入智能控制器发送第一消息。具体地，S-CU-CP收到UE的测量报告信息后，可以通过与无线接入智能控制器之间的R2接口消息(如上报消息)将UE Measurement report发送给无线接入智能控制器。
S904，无线接入智能控制器进行切换决策以及接入控制。
具体地，无线接入智能控制器收到UE的测量报告后，需要执行三方面业务功能：
1)切换决策：无线接入智能控制器基于UE Measurement report的信息执行切换决策，即确定是否对UE执行切换，具体地，无线接入智能控制器可以基于预设的阈值，判断发送测量报告的UE是否需要切换小区，例如，可以基于第一阈值，判断测量报告中的RSRP不满足第一阈值，此时，无线接入智能控制器可以触发切换流程。
当无线接入智能控制器确定触发切换流程之后，则进一步确定切换的目标小区，具体地，无线接入智能控制器可以通过测量报告中，携带的UE与其他小区的信道质量信息，确定要切换的目标小区。
2)接入控制：无线接入智能控制器根据本地保存的UE的上下文中的UE的需求(如上下文中的QoS信息,或者带宽需求等)，目标小区对应的网元(包括T-CU-CP、T-CU-UP、T-DU)的资源状态(如目标小区对应的网元可用资源状态能够满足UE的业务需求)以及接入控制(access control，AC)策略对所述UE进行接入控制。
其中，接入控制策略可以指UE黑名单、用户数限制等信息(如判断UE是否在黑名单中，不允许接入网络，或UE接入后是否超过设定的用户数上限等)。UE上下文包括UE标识、业务QoS、会话信息(如用户面隧道/承载路由信息、会话标识等)等信息。
应理解，新型RAN的现有技术已支持无线接入智能控制器基于和新型RAN网元之间的接口监控CU-CP/DU/CU-UP的性能数据(如资源状态信息)，因此本申请基于无线接入智能控制器已经获知了CU-CP/DU/CU-UP的性能数据，在本申请的方案中，无线接入智能控制器能够基于资源状态进行接入控制。
作为一种可能的实现方式，当无线接入智能控制器在此步骤中发现切换决策过程中确定的目标小区的资源状态不满足UE的需求时，无线接入智能控制器可以利用UE上报的测量报告中指示的其他小区的信息，重新选择合适的目标小区。
3)触发目标小区的切换处理：若上述接入控制验证通过，允许UE接入目标小区，则无线接入智能控制器指示目标小区对应的网元进行切换相关处理。
可选地，S905，无线接入智能控制器向S-CU-CP发送UE上下文请求消息。
具体地，若无线接入智能控制器本地没有保存UE的上下文信息，则在步骤S904中， 无线接入智能控制器完成切换决策处理后，无法结合UE上下文信息对UE进行接入控制判断，因此无线接入智能控制器通过R2接口消息向S-CU-CP请求UE的上下文，请求消息中携带UE标识(UE ID)和请求的数据类型(UE context request indicator)。
或者可选地，无线接入智能控制器也可以基于R2\R3\R4接口目前已支持的数据订阅(R2Subscription消息，且请求的数据类型为UE context的方式来获取UE上下文，具体方式本申请不做具体限定。
可选地，S906，S-CU-CP向无线接入智能控制器发送UE上下文信息。
作为一种可能的实现方式，S-CU-CP基于无线接入智能控制器的请求，将UE的上下文信息返回给无线接入智能控制器，可以通过与无线接入智能控制器之间的R2接口消息(如R2Indication消息)将UE context发送给无线接入智能控制器。
S907，无线接入智能控制器向T-CU-CP发送第一消息。该第二消息可以用于指示目标小区对应的网元为UE分配资源，并创建本地上下文信息。
具体地，无线接入智能控制器基于步骤S940的处理结果，可以通过R2接口消息(如R2 control消息)指示目标小区对应的网元为UE分配资源，并创建本地上下文信息，即向目标CU-CP/T-CU-CP发送R2 control消息，并在消息中携带操作指示信息(如UE context setup indication)和UE上下文描述(UE context)等信息。
S908，T-CU-CP向T-CU-UP发送bearer context setup request请求消息。T-CU-CP根据无线接入智能控制器的指示发起目标小区对应网元的切换处理。T-CU-CP向T-CU-UP发送bearer context setup request请求消息，请求T-CU-UP为UE分配资源、创建E1接口承载。
S909，T-CU-UP完成资源分配和相关处理操作后，回复bearer context setup response响应消息。
S910，T-CU-CP向T-DU发送F1UE context setup request请求消息，请求T-DU为UE分配资源、创建F1接口承载。
S911，T-DU完成资源分配和相关处理操作后，回复F1UE context setup response响应消息。
S912，T-CU-CP向无线接入智能控制器发送第三消息，该第三消息中可以包括T-CU-CP本地的UE Context。
具体地，T-CU-CP完成T-DU和T-CU-UP的相关资源建立后(即分别收到步骤909和步骤910的确认响应消息)，即完成了目标小区对应的网元的切换处理，并通过R2接口消息(如R2Indication)将T-CU-CP本地的UE Context发送给无线接入智能控制器，。无线接入智能控制器可以基于T-CU-CP发送的UE Context更新其本地保存的UE相关上下文。
S913，无线接入智能控制器向S-CU-CP发送第四消息，用于指示源小区对应的网元执行RRC重配置等操作。
具体地，无线接入智能控制器确认目标小区对应的网元上已完成资源分配和相关切换处理后，通过R2接口消息(如R2 control消息)指示源小区对应的网元执行RRC重配置，并释放相关资源、删除UE相关上下文信息，即向源CU-CP/S-CU-CP发送R2 control消息，消息中携带切换指示信息(如HO to T-CU-CP indication)和目标RRC信息等。
HO to T-CU-CP indication可以用于告知S-CU-CP，UE已经切换的所述的T-CU-CP。目标RRC信息用于告知S-CU-CP发起RRC重配置处理，并将所述目标RRC信息发送给UE(使UE能够与目标小区建立新的RRC连接)。所述目标RRC信息包括目标小区标识，T-CU-CP/T-CU-UP/T-DU的路由信息等。
S914，S-CU-CP向S-DU发送F1UE context modification request请求消息。S-CU-CP根据无线接入智能控制器的指示发起源小区对应网元的切换处理。消息中可以携带步骤S913中的目标RRC信息，请求S-DU发起RRC重配置处理。
S915，S-DU指示UE执行RRC重配置，即向UE发送RRC reconfiguration消息，消息携带步骤913中的目标RRC信息。
S916，UE收到请求消息后，执行相应的RRC配置更新，并回复RRC reconfiguration complete消息给S-DU。
S917，S-DU收到UE的响应消息后，回复F1UE context modification response响应消息给S-CU-CP。
S918，S-CU-CP与S-CU-UP进行bearer context modification流程相关的信令交互，实现E1承载的路由更新，并从S-CU-UP获取用户数据的传输状态(如数据包的SN号)。
S919，S-CU-CP通过SN status transfer消息将用户数据的传输状态，S-CU-UP的路由地址等新发送给T-CU-CP。
S920，T-CU-CP收到S-CU-CP的消息后，向T-CU-UP发送Bearer context modification request消息，携带步骤919中的S-CU-UP的路由地址，用于建立与S-CU-UP之间的数据转发通道。建立该通道的原因在于：RRC重建之后，源小区的CP-UP可能还有一些数据没有发送给UE，此时可以先发送给新小区的CU-UP，然后由新的CU-UP发送给UE。
S921，T-CU-UP完成处理后，回复Bearer context modification response消息给T-CU-CP。
S922，T-CU-CP向无线接入智能控制器发送第五消息，该消息中可以携带T-CU-CP更新的UE上下文信息。具体地，T-CU-CP确认源小区网元处理完成后，通过R2接口消息(如R2Indication)将T-CP-CP更新的UE Context发送给无线接入智能控制器，。无线接入智能控制器基于T-CP-CP发送的UE Context再次更新其本地保存的UE相关上下文。此时更新的UE上下文信息中可以包括更新后的路由地址信息。
S923，T-CU-CP与核心网网元(如AMF)进行信息交互，如向AMF发送path switch request消息以更新用户面下行路由地址。
S924，T-CU-CP确认切换处理完成，并知会S-CU-CP(如发送UE context release消息)可以删除源小区网元上UE相关的上下文，并释放资源。
S925，S-CU-CP向S-CU-UP发送Bearer context release请求消息以释放E1接口承载。
S926，S-CU-CP向S-DU发送F1context release请求消息以释放F1接口承载。
本申请实施例应用于新型RAN架构中的切换流程，无线接入智能控制器可以根据对RAN网元资源状况的感知，以及UE上下文和AC策略，直接进行切换决策和接入控制，进而直接发起对目标小区的切换处理，这样可以减少RAN网元之间不必要的信令交互，提高切换成功率。
图10是本申请实施例的另一个UE发生切换的流程示意图。如图10所示：
S1001至S1003与图9中的S901-S903相同，此处不做重复赘述。
S1004，无线接入智能控制器进行切换决策以及接入控制。具体地，无线接入智能控制器收到UE的测量报告后，需要执行三方面业务功能：
1)切换决策和2)接入控制，此步骤与S1004中的切换决策和接入控制相同，此处不做重复赘述。
3)触发源小区发起切换流程：若上述接入控制验证通过，允许UE接入目标小区，则无线接入智能控制器指示源小区对应的网元发起切换相关处理。
S1005，无线接入智能控制器向S-CU-CP发送第二消息，指示源小区进行切换处理。
具体地，无线接入智能控制器基于步骤S1004的处理结果，可以通过R2接口消息(如R2 control消息)指示源小区对应的网元发起切换处理流程，可以向源CU-CP/S-CU-CP发送R2 control消息，消息中可以携带操作指示信息(如HO indication)和目标小区标识(Target cell id)等信息。
S1006，S-CU-CP收到无线接入智能控制器的切换指示后，发起与目标CU-CP(基于target cell id确定的目标小区对应的网元)信令交互，即向T-CU-CP发送HO request消息。
S1007-S1011与图9中的S908-S911相同。
S1011，T-CU-CP完成T-DU和T-CU-UP的相关资源建立后，即完成了目标小区对应的网元的切换处理，向S-CU-CP回复HO request ack消息确认目标小区处理完成。
S1012-S1024与图9中的S914-S926相同，其中，在S1020中，T-CU-CP向无线接入智能控制器发送第三消息，该消息中可以携带T-CU-CP更新的UE上下文信息。具体地，T-CU-CP确认源小区网元处理完成后，通过R2接口消息(如R2Indication)将T-CP-CP更新的UE Context发送给无线接入智能控制器。无线接入智能控制器基于T-CP-CP发送的UE Context再次更新其本地保存的UE相关上下文。此时更新的UE上下文信息中可以包括更新后的路由地址信息。
本申请实施例应用于新型RAN架构中的切换流程，无线接入智能控制器可以根据对RAN网元资源状况的感知，以及UE上下文和AC策略，直接进行切换决策和接入控制，然后将目标小区的信息告知源小区，使得源小区进而发起与目标小区的切换处理，这样可以减少RAN网元之间不必要的信令交互，提高切换成功率。
图11示出了本申请实施例的另一个UE发生切换的流程示意图。如图11所示：
S1101至S1103与图9中的S901-S903相同，此处不做重复赘述。
S1104，源无线接入智能控制器(S-无线接入智能控制器)进行切换决策。具体地，S-无线接入智能控制器收到UE的测量报告后，执行切换决策，即S-无线接入智能控制器基于UE Measurement report的信息执行切换决策，即确定是否对UE执行切换，如需要，则进一步确定切换的目标小区。具体切换决策以及目标小区的确定可以参考图10实施例中的相关描述。
S1105，S-无线接入智能控制器向目标无线接入智能控制器(T-无线接入智能控制器)发送第二消息，该第二消息用于请求T-无线接入智能控制器向目标小区发起切换流程。具体地，若S-无线接入智能控制器在步骤S1104中确定的目标小区不在S-无线接入智能控制器的服务区，则S-无线接入智能控制器基于本地保存的信息(应理解，该信息可以是无线接入智能控制器本地配置的)确定目标小区所属的目标无线接入智能控制器(T-无线接 入智能控制器)，并向T-无线接入智能控制器发送切换请求消息/HO request，消息中可以携带UE标识、UE上下文和目标小区标识。
该切换请求消息可通过无线接入智能控制器之间的接口来发送。若无线接入智能控制器之间没有直连接口，则通过无线接入智能控制器来间接转发无线接入智能控制器之间的交互消息，具体方法本申请不做限定。
S1106，T-无线接入智能控制器进行接入控制。具体地，T-无线接入智能控制器收到S-无线接入智能控制器的切换请求，基于消息中的Target cell id确定目标小区对应的网元(包括T-CU-CP\T-CU-UP/T-DU)，并根据消息中UE上下文中的UE的需求(如上下文中的QoS信息)，目标小区对应的网元的资源状态(如目标小区对应的网元可用资源状态能够满足UE的业务需求)以及接入控制策略对所述UE进行接入控制。
若上述接入控制验证通过，允许UE接入目标小区，则T-无线接入智能控制器指示目标小区对应的网元进行切换相关处理。
S1107，T-无线接入智能控制器向T-CU-CP发送第案消息，该第三消息可以用于指示目标小区对应的网元为UE分配资源，并创建本地上下文信息。
具体地，T-无线接入智能控制器基于步骤S1106的处理结果，通过R2接口消息(如R2 control消息)指示目标小区对应的网元为UE分配资源，并创建本地上下文信息，即向目标CU-CP/T-CU-CP发送R2 control消息，消息中可以携带操作指示信息(如UE context setup indication)和UE上下文描述/UE context等信息。
作为一种可能的实现方式，当源小区也属于T-无线接入智能控制器覆盖范围内时，T-无线接入智能控制器也可以向源小区的S-CU-CP发送指示消息，指示S-CU-CP向目标小区的网元发起HO流程，具体过程可以参考图11所示的实施例，本申请实施例不做过多赘述。
S1108-S1120与图9中的S908-S912相同，本申请实施例不做重复赘述。
S1113，T-无线接入智能控制器向S-无线接入智能控制器发送第五消息，该第五消息可以用于告知S-无线接入智能控制器目标小区已经完成切换。
具体地，T-无线接入智能控制器确认目标小区对应的网元上已完成资源分配和相关切换处理后，回复切换请求响应消息/HO request Ack给S-无线接入智能控制器，消息中携带UE标识和和目标RRC信息等。
S1114-S1127与图9中的S913-S926相同。其中，在S1123中，T-CU-CP向T-无线接入智能控制器发送第七消息，该消息中可以携带T-CU-CP更新的UE上下文信息。具体地，T-CU-CP确认源小区网元处理完成后，通过R2接口消息(如R2Indication)将T-CP-CP更新的UE Context发送给T-无线接入智能控制器。T-无线接入智能控制器基于T-CP-CP发送的UE Context再次更新其本地保存的UE相关上下文。此时更新的UE上下文信息中可以包括更新后的路由地址信息。
本申请实施例应用于新型RAN架构中的切换流程，与图9和图10中的申请实施例相比，本申请实施例可以实现跨无线接入智能控制器的切换业务处理，且能够可以减少RAN网元之间以及RAN网元与核心网网元之间的信令交互。
图12示出了本申请实施例的一个UE从inactive状态转换为connected状态的流程示意图。如图12所示：
S1200，当UE处于去激活态inactive状态时，CU-UP收到针对该UE的下行数据(downlink data，DL data)。
S1201，CU-UP通过E1接口向CU-CP发送下行数据到达通知/DL data notification消息。
S1202，CU-CP发起针对UE的寻呼/Paging。
S1203，DU在其服务区范围开始寻呼UE。
S1204，UE接收到DU的寻呼消息后，向DU发送RRC恢复请求/RRC resume request。
S1205，DU收到UE的请求后，向CU-CP发送Initial UL RRC message transfer以请求获取UE的上下信息。
S1206，CU-CP向无线接入智能控制器发送第一消息，用于请求获取UE的上下文。
具体地，CU-CP收到S1205中DU的请求后，可以通过R2接口消息(如R2 indication)向无线接入智能控制器请求获取UE的上下文，消息中可以携带RRC resume request indication。所述RRC resume request indication用于指示UE的请求类型，并请求获取UE的上下文。
S1207，无线接入智能控制器根据接入控制策略对所述UE进行接入控制。
若验证通过，则无线接入智能控制器根据本地保存的UE的上下文来恢复相应网元上的UE上下文。
接入控制策略可以包括UE黑名单、用户数限制等信息(如判断UE是否在黑名单中，不允许接入网络，或UE接入后是否超过设定的用户数上限等)。UE上下文可以包括UE标识、业务QoS、会话信息(如用户面隧道/承载路由信息、会话标识等)等信息。
S1208，无线接入智能控制器向CU-CP发送第二消息，指示CU-CP为UE分配资源。
具体地，无线接入智能控制器可以通过R2接口消息(如R2 control消息)指示CU-CP为UE分配资源，并创建本地上下文信息，即可以向CU-CP发送R2 control消息，消息中携带准许接入指示信息(如AC permission)和UE上下文描述/UE context等信息。
S1209，CU-CP向DU发送UE context setup request请求消息，请求DU为UE分配资源、创建F1接口承载。
S1210，DU完成资源分配和相关处理操作后，回复UE context setup response响应消息。
S1211，CU-CP将给UE的RRC配置信息发送给DU，即向DU发送RRC message transfer消息。
S1212，DU转发CU-CP给UE的RRC配置信息以恢复RRC连接。
S1213，UE完成RRC配置后，回复RRC resume complete消息以确认RRC配置完成。
S1214，DU将UE的配置完成确认信息通过UL RRC message transfer消息发送给CU-CP。
S1215，CU-CP收到UE的确认消息先后，CU-CP向CU-UP发送bearer context setup request请求消息，请求CU-UP为UE分配资源、恢复E1接口承载。
S1216，CU-UP完成资源分配和相关处理操作后，回复bearer context setup response响应消息。
S1217，CU-CP向无线接入智能控制器发送第三消息，该消息中可以携带CU-CP更新 的UE上下文信息。具体地，CU-CP完成DU和CU-UP的相关资源建立后，通过R2接口消息(如R2Indication)将CU-CP本地的UE Context发送给无线接入智能控制器。无线接入智能控制器基于CU-CP发送的UE Context更新其本地保存的UE相关上下文。此时更新的UE上下文信息中可以包括更新后的路由地址信息。
S1218，CU-CP与核心网网元(如AMF)进行信息交互，如向AMF发送path switch request消息以更新用户面下行路由地址。
本申请实施例涉及UE的状态转换过程，当UE进入INACTIVE状态时，无线承载被删除，相应地，CU-CP也会删除UE context。本申请实施例提供了一种UE从INACTIVE到Connected状态的业务处理流程，无线接入智能控制器可以通过本地保存的UE的上下文信息恢复CU-CP/CU-UP/DU上的UE相关信息，无需CU-CP与之前为UE服务的CU-CP之间进行信令交互，从而减少了网元之间的信令交互，避免了资源浪费。
图13示出了本申请实施例的一个UE初始入网的流程示意图。如图13所示：
S1300，接入控制策略部署配置。所述接入控制策略是指UE黑名单、用户数限制等信息(如判断UE是否在黑名单中，不允许接入网络，或UE接入后是否超过设定的用户数上限等)。策略的部署配置可能是OAM动态进行配置的，或其他策略配置方法，本申请不做具体限定。
S1301，无线接入智能控制器向无线接入智能控制器发送第一消息，用于在无线接入智能控制器创建部署相应的AC策略实例。具体地，无线接入智能控制器基于运营商的策略请求创建AC Policy，并通过R5接口在无线接入智能控制器上创建部署相应的AC Policy实例，即向无线接入智能控制器发送Create Policy instance消息，消息中携带需要部署的AC Policy
S1302，无线接入智能控制器向CU-CP发送第二消息，用于向CU-CP订阅UE的接入信令请求。
具体地，无线接入智能控制器可以基于AC policy向CU-CP订阅UE的接入信令请求，请求可以包括RRC Setup request、RRC resume Request，并通过INSERT指示CU-CP上报事件后暂停业务流程，等待无线接入智能控制器操作指令。
S1303，CU-CP基于无线接入智能控制器的指示，监控UE的信令请求。
S1304，当UE需要接入网络时，向网络发送RRC setup request消息。
S1305，DU收到UE的请求后，向CU-CP发送Initial UL RRC message transfer以转发UE的RRC建立请求消息。
S1306，CU-CP向无线接入智能控制器发送第三消息，消息中可以携带S1305中收到的RRC建立请求消息。
具体地，当CU-CP监控到收到了RRC setup request，将UE的RRC setup request请求消息上报给无线接入智能控制器，即通过R2接口消息(如R2 indication)向无线接入智能控制器发送信息上报消息，消息携带RRC setup request。
S1307，无线接入智能控制器根据接入控制策略对所述UE进行接入控制。
若验证通过，则无线接入智能控制器指示CU-CP为UE分配资源，并创建相关上下文(即执行步骤S1308)。
接入控制策略可以包括UE黑名单、用户数限制等信息(如判断UE是否在黑名单中， 不允许接入网络，或UE接入后是否超过设定的用户数上限等)。所述UE上下文包括UE标识、业务QoS、会话信息(如用户面隧道/承载路由信息、会话标识等)等信息。
S1308，无线接入智能控制器向CU-CP发送第四消息，指示CU-CP为UE分配资源等。
具体地，无线接入智能控制器通过R2接口消息(如R2 control消息)指示CU-CP为UE分配资源，并创建本地上下文信息，即向CU-CP发送R2 control消息，消息中携带准许接入指示信息(如AC permission)和UE上下文描述/UE context等信息。
S1309，CU-CP将给UE的RRC配置信息发送给DU，即向DU发送DL RRC message transfer消息。
S1310，DU转发CU-CP给UE的RRC配置信息以创建RRC连接，即向UE发送RRC setup request消息。
S1311，UE完成RRC配置后，回复RRC setup complete消息以确认RRC配置完成。RRC setup complete消息可携带UE的NAS请求(如Registration NAS)。
S1312，DU将UE的配置完成确认信息通过UL RRC message transfer消息发送给CU-CP。
本申请实施例应用于新型RAN架构中的UE初始入网场景，通过无线接入智能控制器根据AC策略确定是否允许UE接入目标网络，可以将增强对RAN网络的集中控制功能，避免UE与多个网元之间的心灵交互，减少了资源浪费。
图14示出了本申请实施例的一个移动性管理的装置的示意图。如图14所示，该装置1400包括第一接收模块1401和第一处理模块1402。该装置1400可以用于实现上述任一方法实施例中涉及的第一网络设备提供选网信息的功能。例如，该装置1400可以是无线接入智能控制器。
该装置1400可以作为第一网络设备对消息进行处理，并执行上述方法实施例中由第一网络设备对其他网络设备的请求消息进行处理的步骤。所述第一接收模块1401可用于支持该装置1400进行通信，例如执行图5至图8中由第一网络设备执行的接收的动作，所述第一处理模块1402可用于支持装置1400执行上述方法中的处理动作，例如执行图5至8中由第一网络设备执行的处理动作。具体地，可以参考如下描述：
第一接收模块，用于接收第一消息，所述第一消息包括用于指示目标小区的信息；第一处理模块，用于根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：所述终端设备的上下文信息，所述目标小区的资源状态信息。
可选地，所述第一消息包括所述终端设备的测量报告，或者，所述第一消息包括所述目标小区的标识。
可选地，所述装置还包括：第一发送模块，用于发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
可选地，当所述第一消息包括所述终端设备的测量报告时，所述第一处理模块还用于：根据所述终端设的测量报告，确定所述目标小区。
可选地，所述第一发送模块具体用于：向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的网络设备。
可选地，所述第一发送模块还用于：向第三网络设备发送第三消息，所述第三消息包 括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
可选地，所述第一发送模块具体用于：向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
可选地，第一发送模块还用于：发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；所述第一接收模块还用于：接收所述终端设备的上下文信息。
可选地，所述第一接收模块还用于：接收第五消息，所述第五消息用于所述装置更新所述终端设备的上下文信息。
可选地，所述第一处理模块还用于：根据接入控制策略确定是否允许终端设备接入所述目标小区。
可选地，所述第一接收模块还用于：接收第六消息，所述第六消息包括接入控制AC策略。
图15示出了本申请实施例的一个移动性管理的装置的示意图。如图15所示，该装置1500包括第二接收模块1501，第二处理模块1502，第二发送模块1503。该装置1500可以用于实现上述任一方法实施例中涉及的第二网络设备的功能。例如，该装置1500可以是无线接入智能控制器。
该装置1500可以作为第二网络设备对消息进行处理，并执行上述方法实施例中由第二网络设备对测量报告进行处理的步骤。所述第二接收模块1501和第二发送模块1503可用于支持该装置1500进行通信，例如执行图5至图8中由第二网络设备执行的发送/接收的动作。所述第二处理模块1502可用于支持装置1500执行上述方法中的处理动作，例如执行图5至8中由第二网络设备执行的处理动作。具体地，可以参考如下描述：
第二接收模块，用于接收第一消息，所述第一消息包括终端设备的测量报告；第二处理模块，用于根据所述第一消息，确定所述终端设备待接入的目标小区；所述第二处理模块还用于：确定所述目标小区超过所述第二网络设备的服务范围第二发送模块，用于向第一网络设备发送第二消息，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
可选地，所述第二接收模块还用于：接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；所述第二发送模块还用于：发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
图16示出了本申请实施例的一个移动性管理的装置的示意图。如图16所示，该装置1600包括第三发送模块1601和第三接收模块1602。该装置1600可以用于实现上述任一方法实施例中涉及的发起切换流程的功能。例如，该装置1600可以是服务小区的基站或网络设备。
该装置1600可以作为第三网络设备对消息进行处理，并执行上述方法实施例中向目标小区发起切换流程的步骤。所述第三发送模块1601和第三接收模块1602可用于支持该装置1600进行通信，例如执行图5至图8中由终端设备执行的发送/接收的动作。具体地，可以参考如下描述：
第三发送模块，用于发送第一消息，所述第一消息包括终端设备的测量报告；第三接 收模块，用于接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区；所述第三发送模块还用于：发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
图17示出了本申请实施例的一个移动性管理的装置的示意图。如图17所示，该装置1700包括第四接收模块1701和第四处理模块1702。该装置1700可以用于实现上述任一方法实施例中涉及的确定是否允许终端设备接入目标小区的功能。例如，该装置1700可以是无线接入智能控制器。
该装置1700可以作为第四网络设备对消息进行处理，并执行上述方法实施例中确定是否允许终端设备接入目标小区的步骤。所述第四接收模块1701可用于支持该装置1600进行通信，例如执行图5至图8中由终端设备执行的发送/接收的动作。所述第四处理模块1702可用于支持装置1700执行上述方法中的处理动作，例如执行图5至8中由第四网络设备执行的处理动作。具体地，可以参考如下描述：
第四接收模块，用于接收第一消息，所述第一消息包括用于指示目标小区的信息；第四处理模块，用于根据接入控制策略，确定是否允许终端设备接入所述目标小区。
可选地，所述第一消息用于请求获取所述终端设备的上下文信息，所述装置还包括：第四发送模块，用于发送第二消息，所述第二消息包括所述终端设备的上下文信息。
可选地，所述第四接收模块还用于：接收第三消息，所述第三消息用于所述装置更新所述终端设备的上下文信息。
可选地，所述第一消息用于请求接入所述目标小区。
可选地，所述装置还包括：第五发送模块，用于发送第四消息，所述第四消息用于指示所述目标小区中的网络设备在接收到接入请求时，上报给所述装置。
可选地，所述第四发送模块或第五发送模块还用于：发送第五消息，所述第五消息包括允许所述终端设备接入所述目标小区的信息。
可选地，所述第四接收模块还用于：接收第六消息，所述第六消息包括所述接入控制AC策略。
图18示出了本申请实施例的一种移动性管理装置的另一结构示意图。该通信装置1800可用于实现上述方法实施例中描述的关于第一网络设备的方法。该通信装置1800可以是芯片或网络设备。
通信装置1800包括一个或多个处理器1801，该一个或多个处理器1801可支持通信装置1800实现图5至图8中的移动性管理方法。处理器1801可以是通用处理器或者专用处理器。例如，处理器1801可以是中央处理器(central processing unit，CPU)或基带处理器。基带处理器可以用于处理通信数据，CPU可以用于对通信装置(例如，网络设备、终端设备或芯片)进行控制，执行软件程序，处理软件程序的数据。通信装置1800还可以包括收发单元1805，用以实现信号的输入(接收)和输出(发送)。
例如，通信装置1800可以是芯片，收发单元1805可以是该芯片的输入和/或输出电路，或者，收发单元1805可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
通信装置1800中可以包括一个或多个存储器1802，其上存有程序1804，程序1804可被处理器1801运行，生成指令1803，使得处理器1801根据指令1803执行上述方法实 施例中描述的方法。可选地，存储器1802中还可以存储有数据。可选地，处理器1801还可以读取存储器1802中存储的数据，该数据可以与程序1804存储在相同的存储地址，该数据也可以与程序1804存储在不同的存储地址。
处理器1801和存储器1802可以单独设置，也可以集成在一起，例如，集成在单板或者系统级芯片(system on chip，SOC)上。
该通信装置1800还可以包括收发单元1805。收发单元1805可以称为收发机、收发电路或者收发器。
应理解，上述方法实施例的各步骤可以通过处理器1801中的硬件形式的逻辑电路或者软件形式的指令完成。处理器1801可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
图19示出了本申请实施例的一种移动性管理装置的另一结构示意图。该通信装置1900可用于实现上述方法实施例中描述的关于第一网络设备的方法。该通信装置1900可以是芯片或网络设备。
通信装置1900包括一个或多个处理器1901，该一个或多个处理器1901可支持通信装置1900实现图5至图8中的移动性管理方法。处理器1901可以是通用处理器或者专用处理器。例如，处理器1901可以是中央处理器(central processing unit，CPU)或基带处理器。基带处理器可以用于处理通信数据，CPU可以用于对通信装置(例如，网络设备、终端设备或芯片)进行控制，执行软件程序，处理软件程序的数据。通信装置1900还可以包括收发单元1905，用以实现信号的输入(接收)和输出(发送)。
例如，通信装置1900可以是芯片，收发单元1905可以是该芯片的输入和/或输出电路，或者，收发单元1905可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
通信装置1900中可以包括一个或多个存储器1902，其上存有程序1904，程序1904可被处理器1901运行，生成指令1903，使得处理器1901根据指令1903执行上述方法实施例中描述的方法。可选地，存储器1902中还可以存储有数据。可选地，处理器1901还可以读取存储器1902中存储的数据，该数据可以与程序1904存储在相同的存储地址，该数据也可以与程序1904存储在不同的存储地址。
处理器1901和存储器1902可以单独设置，也可以集成在一起，例如，集成在单板或者系统级芯片(system on chip，SOC)上。
该通信装置1900还可以包括收发单元1905。收发单元1905可以称为收发机、收发电路或者收发器。
应理解，上述方法实施例的各步骤可以通过处理器1901中的硬件形式的逻辑电路或者软件形式的指令完成。处理器1901可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
图20示出了本申请实施例的一种移动性管理装置的另一结构示意图。该通信装置 2000可用于实现上述方法实施例中描述的关于第一网络设备的方法。该通信装置2000可以是芯片或网络设备。
通信装置2000包括一个或多个处理器2001，该一个或多个处理器2001可支持通信装置2000实现图5至图8中的移动性管理方法。处理器2001可以是通用处理器或者专用处理器。例如，处理器2001可以是中央处理器(central processing unit，CPU)或基带处理器。基带处理器可以用于处理通信数据，CPU可以用于对通信装置(例如，网络设备、终端设备或芯片)进行控制，执行软件程序，处理软件程序的数据。通信装置2000还可以包括收发单元2005，用以实现信号的输入(接收)和输出(发送)。
例如，通信装置2000可以是芯片，收发单元2005可以是该芯片的输入和/或输出电路，或者，收发单元2005可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
通信装置2000中可以包括一个或多个存储器2002，其上存有程序2004，程序2004可被处理器2001运行，生成指令2003，使得处理器2001根据指令2003执行上述方法实施例中描述的方法。可选地，存储器2002中还可以存储有数据。可选地，处理器2001还可以读取存储器2002中存储的数据，该数据可以与程序2004存储在相同的存储地址，该数据也可以与程序2004存储在不同的存储地址。
处理器2001和存储器2002可以单独设置，也可以集成在一起，例如，集成在单板或者系统级芯片(system on chip，SOC)上。
该通信装置2000还可以包括收发单元2005。收发单元2005可以称为收发机、收发电路或者收发器。
应理解，上述方法实施例的各步骤可以通过处理器2001中的硬件形式的逻辑电路或者软件形式的指令完成。处理器2001可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
图21示出了本申请实施例的一种移动性管理装置的另一结构示意图。该通信装置2100可用于实现上述方法实施例中描述的关于第一网络设备的方法。该通信装置2100可以是芯片或网络设备。
通信装置2100包括一个或多个处理器2101，该一个或多个处理器2101可支持通信装置2100实现图5至图8中的移动性管理方法。处理器2101可以是通用处理器或者专用处理器。例如，处理器2101可以是中央处理器(central processing unit，CPU)或基带处理器。基带处理器可以用于处理通信数据，CPU可以用于对通信装置(例如，网络设备、终端设备或芯片)进行控制，执行软件程序，处理软件程序的数据。通信装置2100还可以包括收发单元2105，用以实现信号的输入(接收)和输出(发送)。
例如，通信装置2100可以是芯片，收发单元2105可以是该芯片的输入和/或输出电路，或者，收发单元2105可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
通信装置2100中可以包括一个或多个存储器2102，其上存有程序2104，程序2104可被处理器2101运行，生成指令2103，使得处理器2101根据指令2103执行上述方法实 施例中描述的方法。可选地，存储器2102中还可以存储有数据。可选地，处理器2101还可以读取存储器2102中存储的数据，该数据可以与程序2104存储在相同的存储地址，该数据也可以与程序2104存储在不同的存储地址。
处理器2101和存储器2102可以单独设置，也可以集成在一起，例如，集成在单板或者系统级芯片(system on chip，SOC)上。
该通信装置2100还可以包括收发单元2105。收发单元2105可以称为收发机、收发电路或者收发器。
应理解，上述方法实施例的各步骤可以通过处理器2101中的硬件形式的逻辑电路或者软件形式的指令完成。处理器2101可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
本申请实施例中的方法，如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在计算机可读存储介质中，基于这样的理解，本申请的技术方案或技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。该存储介质至少包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种移动性管理方法，其特征在于，所述方法包括：
    第一网络设备接收第一消息，所述第一消息包括用于指示目标小区的信息；
    所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：
    所述终端设备的上下文信息，所述目标小区的资源状态信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一消息包括所述终端设备的测量报告，或者，
    所述第一消息包括所述目标小区的标识。
  3. 根据权利要1或2所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
  4. 根据权利要求2或3所述的方法，其特征在于，当所述第一消息包括所述终端设备的测量报告时，所述方法还包括：
    所述第一网络设备根据所述终端设的测量报告，确定所述目标小区。
  5. 根据权利要求3所述的方法，其特征在于，所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：
    所述第一网络设备向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的网络设备。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备向第三网络设备发送第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
  7. 根据权利要求3所述的方法，其特征在于，所述第一网络设备发送第二消息，所述第二消息用于向所述目标小区发起切换流程包括：
    所述第一网络设备向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
  8. 根据权利要求1-7中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；
    所述第一网络设备接收所述终端设备的上下文信息。
  9. 根据权利要求1-8中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备接收第五消息，所述第五消息用于所述第一网络设备更新所述终端设备的上下文信息。
  10. 根据权利要求1-9中任一项所述的方法，其特征在于，所述第一网络设备根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区还包括：
    所述第一网络设备根据接入控制策略确定是否允许终端设备接入所述目标小区。
  11. 根据权利要求1-10中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备接收第六消息，所述第六消息包括接入控制AC策略。
  12. 一种移动性管理方法，其特征在于，包括：
    第二网络设备接收第一消息，所述第一消息包括终端设备的测量报告；
    所述第二网络设备根据所述第一消息，确定所述终端设备待接入的目标小区；
    所述第二网络设备确定所述目标小区超过所述第二网络设备的服务范围；
    所述第二网络设备向第一网络设备发送第二消息，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；
    所述第二网络设备发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
  14. 一种移动性管理方法，其特征在于，包括：
    第三网络设备发送第一消息，所述第一消息包括终端设备的测量报告；
    所述第三网络设备接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区；
    所述第三网络设备发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
  15. 一种移动性管理的装置，其特征在于，所述装置包括：
    第一接收模块，用于接收第一消息，所述第一消息包括用于指示目标小区的信息；
    第一处理模块，用于根据以下中的至少一种信息，确定是否允许终端设备接入所述目标小区：
    所述终端设备的上下文信息，所述目标小区的资源状态信息。
  16. 根据权利要求15所述的装置，其特征在于，所述第一消息包括所述终端设备的测量报告，或者，
    所述第一消息包括所述目标小区的标识。
  17. 根据权利要求15或16所述的装置，其特征在于，所述装置还包括：
    第一发送模块，用于发送第二消息，所述第二消息用于向所述目标小区发起切换流程。
  18. 根据权利要求16或17所述的装置，其特征在于，当所述第一消息包括所述终端设备的测量报告时，所述第一处理模块还用于：
    根据所述终端设的测量报告，确定所述目标小区。
  19. 根据权利要求17所述的装置，其特征在于，所述第一发送模块具体用于：
    向第二网络设备发送所述第二消息，所述第二网络设备为服务所述目标小区的网络设备。
  20. 根据权利要求19所述的装置，其特征在于，所述第一发送模块还用于：
    向第三网络设备发送第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息，所述第三网络设备为服务源小区的网络设备，其中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
  21. 根据权利要求17所述的装置，其特征在于，所述第一发送模块具体用于：
    向第四网络设备发送所述第二消息，所述第四网络设备为服务源小区的网络设备，其 中，所述源小区为所述终端设备发生切换流程之前连接到的小区。
  22. 根据权利要求15-21中任一项所述的装置，其特征在于，第一发送模块还用于：
    发送第四消息，所述第四消息用于请求获取所述终端设备的上下文信息；
    所述第一接收模块还用于：接收所述终端设备的上下文信息。
  23. 根据权利要求15-22中任一项所述的装置，其特征在于，所述第一接收模块还用于：
    接收第五消息，所述第五消息用于所述装置更新所述终端设备的上下文信息。
  24. 根据权利要求15-23中任一项所述的装置，其特征在于，所述第一处理模块还用于：
    根据接入控制策略确定是否允许终端设备接入所述目标小区。
  25. 根据权利要求15-24中任一项所述的装置，其特征在于，所述第一接收模块还用于：
    接收第六消息，所述第六消息包括接入控制AC策略。
  26. 一种移动性管理的装置，其特征在于，所述装置包括：
    第二接收模块，用于接收第一消息，所述第一消息包括终端设备的测量报告；
    第二处理模块，用于根据所述第一消息，确定所述终端设备待接入的目标小区；
    所述第二处理模块还用于：确定所述目标小区超过所述第二网络设备的服务范围；
    第二发送模块，用于向第一网络设备发送第二消息，所述第二消息包括所述目标小区的标识，其中，所述第一网络设备的服务范围覆盖所述目标小区。
  27. 根据权利要求26所述的装置，其特征在于，所述第二接收模块还用于：
    接收第三消息，所述第三消息包括所述终端设备切换到所述目标小区的信息；
    所述第二发送模块还用于：
    发送第四消息，所述第四消息包括所述终端设备切换到所述目标小区的信息。
  28. 一种移动性管理的装置，其特征在于，所述装置包括：
    第三发送模块，用于发送第一消息，所述第一消息包括终端设备的测量报告；
    第三接收模块，用于接收第二消息，所述第二消息包括目标小区的标识，所述目标小区为所述终端设备待接入的小区；
    所述第三发送模块还用于：发送第三消息，所述第三消息用于向所述目标小区发起切换流程。
  29. 一种计算机可读存储介质，其特征在于，所述计算机可读介质存储用于设备执行的计算机程序，所述计算机程序包括用于执行如权利要求1-14中任一项所述的方法的程序指令。
  30. 一种芯片，其特征在于，所述芯片包括处理器与数据接口，所述处理器通过所述数据接口读取存储器上存储的程序指令，以执行如权利要求1-14中任一项所述的方法。
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