WO2018171463A1 - 移动性管理方法、装置及存储介质 - Google Patents

移动性管理方法、装置及存储介质 Download PDF

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Publication number
WO2018171463A1
WO2018171463A1 PCT/CN2018/078760 CN2018078760W WO2018171463A1 WO 2018171463 A1 WO2018171463 A1 WO 2018171463A1 CN 2018078760 W CN2018078760 W CN 2018078760W WO 2018171463 A1 WO2018171463 A1 WO 2018171463A1
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Prior art keywords
base station
cell
source base
target base
changed
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PCT/CN2018/078760
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English (en)
French (fr)
Inventor
戴谦
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中兴通讯股份有限公司
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Publication of WO2018171463A1 publication Critical patent/WO2018171463A1/zh

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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
    • 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
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • 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
    • 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
    • H04W36/08—Reselecting an access point

Definitions

  • the present invention relates to the field of communications, and in particular, to a mobility management method, apparatus, and storage medium.
  • the 5G new radio access technology introduces an inactive state.
  • the two states are similar in nature.
  • LTE RAN and 5G RAN light Both the connected state and the inactive state belong to the sub-state of the RRC (Radio Resource Control) connection state. If the terminal is in the light connected state or the inactive state, the RRC connection with the RAN remains, and the signaling bearer and data bearer remain.
  • RRC Radio Resource Control
  • the difference is that the terminal and the RAN need to save the terminal context, and the mobility of the terminal adopts the cell reselection mode, and the terminal monitors the paging of the RAN and the core network (CN, Core Network).
  • the introduction of the above two new states can partially reduce the power consumption of the terminal and the number of times the terminal switches from the idle (IDLE) state to the connected state, thereby reducing part of the signaling overhead.
  • embodiments of the present invention are expected to provide a mobility management method, apparatus, and storage medium.
  • the embodiment of the invention provides a mobility management method, including:
  • the user equipment UE, User Equipment
  • the light-connected state After the user equipment (UE, User Equipment) in the inactive state or the light-connected state satisfies the condition of the changed cell and determines the target base station of the changed cell, determining the changed cell mode of the UE;
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the target base station satisfies one of the following:
  • the RAT belongs to the same class as the source base station
  • the RAT to which it belongs is different from the source base station.
  • the performing the handover of the UE according to the determined changed cell manner includes:
  • the change cell request message further includes: an access stratum context identifier AS (Access Stratum) context ID (Identification) allocated by the source base station to the UE, where the access The layer context identifier is used to identify the identity of the UE at the source base station and the context storage of the UE at the source base station.
  • AS Access Stratum
  • ID Identity
  • the performing the handover of the UE according to the determined changed cell manner includes:
  • the changed cell response message carries one or more of the following: a UE ID or an AS context ID allocated by the target base station to the UE, and a context established by the target base station side for the UE; Sending a change cell command message to the UE, where the change cell command message is used to instruct the UE to initiate a change cell to the target base station, where the change cell command message includes at least the UE allocated by the target base station to the UE ID or AS context ID.
  • the changing the cell mode is to send the change cell command message to the UE when the user plane of the UE is linked to the source base station, where the change cell command message is further used to indicate that the UE stops one or more of the following behaviors. :
  • the performing the handover of the UE according to the determined changed cell manner includes:
  • the packet data convergence protocol (PDCP, Packet Data Convergence Protocol) layer and the radio link layer control protocol (RLC, Radio) are reserved for the UE when the user plane of the UE is linked to the source base station.
  • the Link Control layer and the RRC layer function entity are at the source base station, and process user plane data and control plane signaling transparently transmitted by the target base station to the source base station, so that the target base station only completes the data sent and received by the UE.
  • MAC Media Access Control
  • the performing the handover of the UE according to the determined changed cell manner includes:
  • the change cell request message is sent to the target base station, where the change cell request message carries the UE context and the MAC scheduling, measurement, and system message of the source base station.
  • the physical layer-related part does not contain the context part related to PDCP, RLC, and security.
  • the performing the handover of the UE according to the determined changed cell manner includes: maintaining the UE in an inactive state when the user plane of the UE is kept in the source base station, and The context of the UE is saved.
  • the performing the handover of the UE according to the determined changed cell manner includes one or two of the following: when the changed cell mode is to keep the user plane link of the UE in the source base station, receiving the target a notification message of the base station, where the notification message is used to notify the source base station that the UE has been accessed by the target base station; and after learning that the UE has accessed the target base station, send an update to the target base station to the UE.
  • the performing the handover of the UE according to the determined changed cell manner includes: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, receiving a changed cell response message from the target base station And sending a change cell command message to the UE, where the change cell command message includes a suspension indication, where the suspension indication is used to indicate that the UE saves the source base station context after completing the changed cell, and sends the change cell command message to the UE, and saves Source base station side context of the UE.
  • the performing the handover of the UE according to the determined changed cell manner includes: when the user plane of the UE is transferred to the target base station, the method of changing the cell command is sent to the UE, where
  • the change cell command message further includes: a context established by the target base station side for the UE, AS security information, or NAS security information.
  • a mobility management device comprising:
  • a first determining module configured to determine, after the UE in the inactive state or the light-connected state meets the condition of the changed cell and determine the target base station of the changed cell, determine the changed cell mode of the UE;
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell mode
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including:
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including:
  • the change cell request message includes: an AS context ID allocated by the source base station to the UE, where the access layer context identifier is used to identify the identity of the UE at the source base station and The UE is stored in the context of the source base station.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell mode, including:
  • the changed cell response message carries one or more of the following: a UE ID or an AS context ID allocated by the target base station to the UE, and a context established by the target base station side for the UE;
  • the changing the cell mode is to send the change cell command message to the UE when the user plane of the UE is linked to the source base station, where the change cell command message is further used to indicate that the UE stops one or more of the following behaviors. :
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including: when the changed cell mode is to keep the user plane link of the UE in the source base station, retaining the corresponding The PDCP layer, the RLC layer, and the RRC layer functional entity of the UE are at the source base station, and process user plane data and control plane signaling transparently transmitted by the target base station to the source base station, so that the target base station only completes the UE.
  • the MAC layer operation of the transmitted and received data and signaling including: when the changed cell mode is to keep the user plane link of the UE in the source base station, retaining the corresponding The PDCP layer, the RLC layer, and the RRC layer functional entity of the UE are at the source base station, and process user plane data and control plane signaling transparently transmitted by the target base station to the source base station, so that the target base station only completes the UE.
  • the MAC layer operation of the transmitted and received data and signaling including: when the changed cell mode is to
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including:
  • the change cell request message is sent to the target base station, where the change cell request message carries the UE context and the MAC scheduling, measurement, and system message of the source base station.
  • the physical layer-related part does not contain the context part related to PDCP, RLC, and security.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including: when the changing cell mode is to keep the user plane of the UE linked to the source base station, The UE is in an inactive state and saves the context of the UE.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, including: when the changed cell mode is to keep a user plane link of the UE in a source base station, receiving a notification message of the target base station, and returning a response message to the target base station, where the notification message is used to notify the source base station that the UE has been accessed by the target base station, and the response message carries an update to the UE AS security information or NAS security information.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, and includes: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, And the change cell command message is sent to the UE, where the change cell command message includes a suspension indication, where the suspension indication is used to indicate that the UE saves the source base station context after completing the cell change, and sends the change to the UE. After the cell command message, the source base station side context of the UE is saved.
  • the first switching module is configured to perform the handover of the UE according to the determined changed cell manner, and includes: when the changed cell mode is to transfer a user plane of the UE to a target base station, to the UE And sending the change cell command message, where the change cell command message further includes: a context established by the target base station side for the UE, AS security information, or NAS security information.
  • a mobility management method including:
  • the changed cell request message carries at least a changed cell mode identifier, where the changed cell mode identifier indicates a changed cell mode determined by the source base station;
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the performing the handover of the UE according to the method of changing the cell indicated by the changed cell request message includes:
  • the user plane of the UE when the user plane of the UE is linked to the source base station, receiving updated AS security information or NAS security information from the source base station to the UE, and the updated AS security information or The NAS security information is transparently transmitted to the UE.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: when the changed cell mode is to transfer the user plane of the UE to the target base station, at the source base station and And when the target base station shares the same core network node, sending a change cell response message to the source base station, where the change cell response message includes AS security information established by the target base station for the UE, and a NAS security information retention identifier, the NAS security information
  • the keep-alive flag is used to inform the UE to retain the NAS security information of the source cell after the cell is changed for reuse at the target base station.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, receiving the source base station When the AS security completion message of the transparent UE is completed, the AS security negotiation is confirmed; when the NAS security completion message of the UE transparently transmitted by the source base station is received, the NAS security completion message is forwarded to the core network to complete the NAS security.
  • negotiation confirmation confirmation.
  • a mobility management device comprising:
  • the second receiving module is configured to receive the changed cell request message from the source base station, where the changed cell request message carries at least the changed cell mode identifier, where the changed cell mode identifier indicates the changed cell mode determined by the source base station;
  • the second switching module is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the second switching module is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, including:
  • the second switching module is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, including:
  • the switching cell mode When the switching cell mode is to transfer the user plane of the UE to the target base station, when the source base station and the target base station share the same core network node, send a change cell response message to the source base station, where the change is performed.
  • the cell response message includes the AS security information established by the target base station for the UE, does not include the NAS security information, and the identifier, and the identifier is used to notify the UE to retain the NAS security information of the source cell after the cell is changed to be reused at the target base station.
  • the second switching module is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, where: when the changed cell mode is to transfer the user plane of the UE to the target base station And receiving the AS security completion message of the UE transparently transmitted by the source base station, and confirming that the AS security negotiation is complete; and when receiving the NAS security completion message of the UE transparently transmitted by the source base station, forwarding the NAS security completion message Negotiate the core network to complete the negotiation of NAS security.
  • a mobility management method including:
  • the changed cell command message is used to indicate that the UE initiates a change of the cell to the target base station, where the changed cell command message carries at least the changed cell mode identifier determined by the source base station;
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the performing the handover according to the mode of changing the cell indicated by the change of the cell command message includes:
  • the performing the handover according to the mode of changing the cell indicated by the change of the cell command message includes:
  • the mode of changing the cell is to keep the state of the source base station and keep the context of the source base station when the user plane of the UE is linked to the source base station.
  • the maintaining the state of the source base station includes: maintaining the PDCP entity and the PDCP state of the source base station, the RLC entity and the RLC state, the AS security information, and the NAS security information, and transferring the state of the source base station to the idle state (IDLE) )state.
  • the mode of changing the cell is to transfer the user plane of the UE to the target base station, and then transfer the state of the source base station to the IDLE state after completing the handover process;
  • the performing the handover according to the mode of changing the cell indicated by the change of the cell command message includes:
  • the mode of changing the cell is to stop the behavior of the corresponding item according to the changed cell command message when the user plane of the UE is linked to the source base station;
  • the behavior of the corresponding item includes one or more of the following:
  • the performing the handover according to the mode of changing the cell indicated by the change of the cell command message includes:
  • the method for changing the cell is to keep the PDCP entity and the RLC entity of the source base station that is maintained by the UE when the user plane of the UE is linked to the source base station, after the access of the target base station is completed, and the data or signaling is used for sending and receiving data.
  • AS security information AS security information
  • NAS security information to handle PDCP layer, RLC layer operation, AS encryption and decryption, NAS encryption and decryption, integrity protection.
  • the performing the handover according to the mode of changing the cell indicated by the change of the cell command message includes:
  • the method for changing the cell is to keep the user plane of the UE from being connected to the source base station, and after receiving the target base station, if receiving the AS security information or NAS security from the source base station transparently transmitted by the target base station After the information is updated, the updated AS security information or NAS security information is used to complete AS encryption and decryption, NAS encryption and decryption, and integrity protection of data or signaling.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes:
  • the changing cell mode is when the user plane of the UE is transferred to the target base station:
  • the context of the target base station side is obtained from the changed cell command message and stored;
  • the received redirected cell command message carries the AS security information generated by the target base station for the UE, completes the AS security key negotiation according to the AS security information, and passes the source base station when the key key negotiation succeeds. Sending an AS security completion message to the target base station;
  • the received cell command message carries the NAS security information generated by the core network connected to the target base station, complete the NAS security key negotiation according to the NAS security information, and pass the source when the key negotiation succeeds.
  • the base station transparently transmits the NAS security completion message to the core network to which the target base station is connected.
  • a mobility management device comprising:
  • a third receiving module configured to receive a change cell command message sent by the source base station, where the change cell command message is used to instruct the UE to initiate a change cell to the target base station, where the change cell command message carries at least the changed cell mode determined by the source base station Identification
  • the third switching module is configured to perform switching according to the changed cell mode indicated by the changed cell command message
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the third switching module is configured to perform the switching according to the changed cell mode indicated by the changed cell command message, including:
  • the third switching module is configured to perform the switching according to the changed cell mode indicated by the changed cell command message, including:
  • the mode of changing the cell is to keep the state of the source base station and keep the context of the source base station when the user plane of the UE is linked to the source base station;
  • the maintaining the state of the source base station includes: maintaining the PDCP entity and the PDCP state of the source base station, the RLC entity and the RLC state, the AS security information, and the NAS security information, and transferring the state of the source base station to the IDLE state.
  • the third switching module is configured to perform the switching according to the changed cell mode indicated by the changed cell command message, including:
  • the mode of changing the cell is to stop the behavior of the corresponding item according to the changed cell command message when the user plane of the UE is linked to the source base station;
  • the behavior of the corresponding item includes one or more of the following:
  • the third switching module is configured to perform the switching according to the changed cell mode indicated by the changed cell command message, including:
  • the method for changing the cell is to keep the PDCP entity and the RLC of the source base station that the UE itself maintains when transmitting and receiving data or signaling after the user plane of the UE is linked to the source base station.
  • Entity AS security information
  • NAS security information to handle PDCP layer
  • RLC layer operation AS encryption and decryption
  • NAS encryption and decryption integrity protection.
  • the third switching module is configured to perform switching according to the changed cell mode indicated by the changed cell command message, including:
  • the method for changing the cell is to use the update after receiving the update of the AS security information or the NAS security information from the source base station transparently transmitted by the target base station when the user plane of the UE is linked to the source base station.
  • AS security information or NAS security information completes AS encryption and decryption of data or signaling, NAS encryption and decryption, and integrity protection.
  • the third switching module is configured to perform the switching according to the changed cell mode indicated by the changed cell command message, including:
  • the changing cell mode is when the user plane of the UE is transferred to the target base station:
  • the changed cell command message When the changed cell command message carries the context of the target base station side established by the target base station for the UE, the context of the target base station side is obtained from the changed cell command message and stored;
  • the AS security key negotiation is performed according to the AS security information, and the AS security completion message is sent to the target base station by the source base station when the key key negotiation succeeds;
  • the NAS security key negotiation is completed according to the NAS security information, and the NAS security completion message is transparently transmitted to the core connected to the target base station through the source base station when the key key negotiation succeeds. network.
  • the third switching module is configured to perform the handover according to the changed cell mode indicated by the changed cell command message, where the changing the cell mode is to transfer the user plane of the UE to the target base station, and complete the handover.
  • the UE is then transferred to the state of the source base station to the IDLE state.
  • a mobility management apparatus comprising: a processor and a memory, the memory storing computer executable instructions, the computer executable instructions being implemented by the processor to implement the following method:
  • the UE in the inactive state or the light-connected state satisfies the condition of the changed cell and determines the target base station of the changed cell, determining the changed cell mode of the user equipment UE;
  • the method for changing a cell of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station;
  • the computer executable instructions are implemented by the processor to implement the following method:
  • the changed cell request message carries at least a changed cell mode identifier, where the changed cell mode identifier indicates a changed cell mode determined by the source base station;
  • the method for changing a cell of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station;
  • the computer executable instructions are implemented by the processor to implement the following method:
  • the changed cell command message is used to indicate that the UE initiates a change of the cell to the target base station, where the changed cell command message carries at least the changed cell mode identifier determined by the source base station;
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the embodiment of the present invention further provides a mobility management apparatus, including: a processor and a memory, wherein the memory stores computer executable instructions, and the computer executable instructions are executed by the processor to perform the mobility management method .
  • An embodiment of the present invention further provides a storage medium, where the storage medium includes a stored program, where the program runs to execute the mobility management method described above.
  • the mobility management method and apparatus in the embodiment of the present invention implements mobility management between LTE and 5G New RAT in an inactive state or a light connected state, and solves the LTE and 5G base stations in the RRC new state of LTE and 5G.
  • the issue of mobility management is not limited to, but not limited to
  • FIG. 1 is a schematic flowchart of a mobility management method according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a component of a mobility management apparatus according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a mobility management method according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a component of a mobility management apparatus according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of a mobility management method according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic structural diagram of a component of a mobility management apparatus according to Embodiment 3 of the present invention.
  • Example 7 is a structural diagram of a modified cell of Example 1.
  • Example 8 is a flow chart of mobility management of Example 1.
  • Example 9 is a structural diagram of a modified cell of Example 2.
  • Example 10 is a flow chart of mobility management of Example 2.
  • Example 11 is a schematic diagram of a source node and a target base station sharing the same core network node in Example 2;
  • Example 12 is a structural diagram of a modified cell of Example 3.
  • FIG. 13 is a flow chart of mobility management of Example 3.
  • mobility between different RATs can be used as a reference, for example, handover between LTE and Code Division Multiple Access (CDMA), LTE and Global System for Mobile Communication (GSM). Switching between LTE and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA).
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communication
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • the present application provides a mobility management method and apparatus between LTE and 5G New RAT in an inactive state or a light connected state.
  • a mobility management method may include:
  • Step 101 After the UE in the inactive state or the lightly connected state satisfies the condition of the changed cell and determines the target base station of the changed cell, determine the changed cell mode of the UE.
  • Step 102 Perform handover of the UE according to the determined changed cell mode.
  • the method for changing a cell of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station.
  • the foregoing method of this embodiment may be implemented by a source base station.
  • the target base station satisfies one of the following: the associated radio access technology RAT and the source base station are of the same type; the associated radio access technology RAT is different from the source base station.
  • the determining the mode of changing the cell of the UE includes: determining, when the service type of the UE is infrequently small data, or determining that the UE is in a short-term coverage, determining to change the cell mode to maintain the UE The link is linked to the source base station; when the service type of the UE is not the infrequent small data and it is determined that the UE is not temporarily leaving the coverage, determining that the changed cell mode is to transfer the user plane of the UE to the target base station.
  • the performing the handover of the UE according to the determined changed cell manner includes: sending a change cell request message to the target base station, where the change cell request message carries the changed cell mode identifier, the changed cell
  • the mode identifier is used to identify the determined changed cell mode, that is, the cell mode identifier is used to identify which cell mode is required to be used by the source base station.
  • the changed cell request message may further include: an access stratum context identifier allocated by the source base station to the UE, where the access stratum context identifier is used to identify an identity of the UE at a source base station, and the UE is in a source Context storage of the base station.
  • the performing the handover of the UE according to the determined changed cell manner includes: receiving a changed cell response message from a target base station, where the changed cell response message carries one or more of the following: target base station allocation a UE ID or an AS context ID of the UE, and a context established by the target base station side for the UE; and a change cell command message is sent to the UE, where the change cell command message is used to instruct the UE to initiate a change to the target base station.
  • the cell, the changed cell command message includes at least a UE ID or an AS context ID allocated by the target base station to the UE.
  • the changing the cell command message may further be used to indicate that the UE stops one or more of the following actions when the user mode of the UE is linked to the source base station:
  • the periodic monitoring of the physical channel of the source base station is stopped (for example, the method may include: stopping the downlink control channel of the source base station, the paging channel of the source base station, the monitoring of the source base station system message, etc.);
  • the performing the handover of the UE according to the determined changed cell manner includes: when the user mode of the UE is kept in the source base station, the PDCP layer and the RLC layer corresponding to the UE are reserved.
  • the RRC layer function entity is at the source base station, and processes user plane data and control plane signaling transparently transmitted by the target base station to the source base station, so that the target base station only completes data and signaling sent and received by the UE.
  • MAC layer operation that is, MAC layer resource scheduling and MAC protocol data unit (PDU) packet/unpacking.
  • the performing the handover of the UE according to the determined changed cell manner includes: when the cell mode is changed to keep the user plane of the UE from being linked to the source base station, where the changed cell request message carries the UE context of the source base station.
  • the part related to MAC scheduling, measurement, system message, and physical layer does not include the context part related to PDCP, RLC, and security.
  • the part related to the MAC scheduling, measurement, system message, and physical layer in the UE context of the source base station includes one or a combination of the following:
  • the established radio access bearer context (including the Qos parameters of each radio access bearer);
  • the part of the AS configuration parameter related to MAC scheduling, measurement, system message, and physical layer for example, antenna information, radio resource configuration, downlink carrier frequency, etc.
  • RRM radio resource management
  • the part of the AS context related to MAC scheduling, measurement, system message, and physical layer for example, power Preference Indication, connection reconstruction information, etc.
  • Mobility restriction list (including Public Land Mobile Network (PLMN), equivalent PLMN, PLMN forbidden to access).
  • PLMN Public Land Mobile Network
  • the performing the handover of the UE according to the determined changed cell manner may further include: when the changed cell mode is to keep the user plane link of the UE in the source base station, sending the changed cell to the UE After the command message, the UE is kept in an inactive state, and the context of the UE is saved.
  • the maintaining the UE in an inactive state may include: maintaining a PDCP entity and a PDCP state, an RLC entity and an RLC state, an AS security information, and NAS security information of the UE at the source base station.
  • the performing the handover of the UE according to the determined changed cell manner further includes: when the changed cell mode is to keep the user plane of the UE linked to the source base station, sending a change cell command to the UE Receiving a notification message from the target base station, and returning a response message to the target base station, where the notification message is used to notify the source base station that the UE has initiated an access at the target base station, and the response message is carried in the response message.
  • the performing the handover of the UE according to the determined changed cell mode includes: when the user plane of the changed UE is linked to the target base station, after confirming the target cell of the changed cell,
  • the change cell request message further includes a PDCP state and an RLC state of the UE at the source base station.
  • the performing the handover of the UE according to the determined changed cell manner includes: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, receiving a changed cell response message from the target base station And sending a change cell command message to the UE, where the change cell command message includes a suspend indication, where the suspend indication is used to indicate that the UE saves the source base station context after completing the cell change process.
  • the performing the handover of the UE according to the determined changed cell manner includes: when the changed cell mode is that the user plane of the UE is linked to the target base station, the change cell command message further includes:
  • the target base station side is the context established by the UE, AS security information, or NAS security information.
  • the performing the handover of the UE according to the determined changed cell manner includes: receiving the AS fed back by the UE when the changed cell mode is to transfer a user plane of the UE to a target base station When the security message or the NAS security completion message is transmitted, the AS security message or the NAS security completion message is transparently transmitted to the target base station.
  • a mobility management device may include:
  • the first determining module 21 is configured to determine, after the UE in the inactive state or the light-connected state meets the condition of the changed cell and determine the target base station of the changed cell, determine the changed cell mode of the user equipment UE;
  • the first switching module 22 is configured to perform handover of the UE according to the determined changed cell mode
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including:
  • the change cell request message further includes: an access layer context identifier allocated by the source base station to the UE, the access layer context identifier is used to identify an identity of the UE at a source base station, and the UE is at a source base station Context storage.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including:
  • the changed cell response message carries one or more of the following: a UE ID or an AS context ID allocated by the target base station to the UE, and a context established by the target base station side for the UE;
  • the redirecting cell command message is further used to indicate that the UE stops one or more of the following behaviors when the cell mode is changed to keep the user plane of the UE in the source base station:
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including: when the changed cell mode is to keep the user plane link of the UE in the source base station, Corresponding to the PDCP layer, the RLC layer, and the RRC layer function entity of the UE at the source base station, and processing user plane data and control plane signaling transparently transmitted by the target base station to the source base station, so that the target base station only completes the MAC layer operation of data and signaling sent and received by the UE.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including: when the cell mode is changed to keep the user plane link of the UE in the source base station, the change cell request.
  • the message carries a part of the UE context of the source base station related to the MAC scheduling, measurement, system message, and physical layer, and does not include a context part related to PDCP, RLC, and security.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including: when the changing cell mode is to keep the user plane link of the UE in the source base station, The UE is in an inactive state and saves the context of the UE.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, and includes: receiving, when the changed cell mode is to keep a user plane of the UE in a source base station, receiving a notification message from the target base station, and returning a response message to the target base station, where the notification message is used to notify the source base station that the UE has initiated an access at the target base station, and the response message is carried to the UE Updated AS security information or NAS security information.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, including: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, The redirected cell response message from the target base station sends a change cell command message to the UE, where the change cell command message includes a suspend indication, where the suspend indication is used to indicate that the UE saves the source base station context after completing the remodeling of the cell, and sends the source base station context to the UE.
  • the source base station side context of the UE is saved; or, when the changed cell mode is to transfer the user plane of the UE to the target base station, the changed cell response message from the target base station is received, and the UE is sent to the UE. Transmitting a cell command message and deleting the source base station side context of the UE.
  • the first switching module 22 is configured to perform the handover of the UE according to the determined changed cell manner, where: when the changed cell mode is to transfer the user plane of the UE to the target base station,
  • the change cell command message further includes: a context established by the target base station side for the UE, AS security information, or NAS security information.
  • Yet another mobility management apparatus comprising: a processor and a memory, the memory storing computer executable instructions, the computer executable instructions being implemented by the processor to implement the following method:
  • the UE in the inactive state or the light-connected state satisfies the condition of the changed cell and determines the target base station of the changed cell, determining the changed cell mode of the user equipment UE;
  • the method for changing a cell of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station.
  • the first determining module and the first switching module may be implemented by software, hardware, or a combination of the two.
  • the first determining module may be implemented by a communication unit in a base station or the like
  • the first switching module may be implemented by a combination of a processor, a communication unit, or the like in a base station or the like.
  • the mobility management apparatus of this embodiment may be implemented by being deployed on a base station or the like or directly by a UE or the like. In this regard, this article does not limit.
  • a mobility management method may include:
  • Step 301 Receive a changed cell request message from a source base station, where the changed cell request message carries at least a changed cell mode identifier, where the changed cell mode identifier indicates a mode of changing a cell determined by the source base station;
  • Step 302 Perform handover of the UE according to the changed cell mode indicated by the changed cell request message.
  • the method for changing a cell of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station.
  • the foregoing method of this embodiment may be implemented by a target base station.
  • the target base station may satisfy one of the following: the RAT of the eNB and the source eNB are of the same type; the RAT of the eNB is different from the source eNB.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: after receiving the UE according to the changed cell request message, assigning a UE ID to the UE for identifying The identity of the UE in the target base station; or, the UE is assigned an AS context ID for simultaneously identifying the identity of the UE at the target base station and the context storage of the UE at the target base station.
  • the method further includes: after the target base station confirms accepting the UE to change the cell, the target base station feeds back a change cell response message to the source base station, where the changed cell response message includes the target base station allocated to the The UE ID or AS context ID of the UE.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: determining, when the changed cell mode is that the user plane link of the UE is maintained at the source base station, determining to change the admission UE After the cell, the MAC entity and the physical layer related configuration of the UE are established according to the context content of the UE that is included in the change of the cell request message, and the MAC entity and the PDCP and the RLC entity of the UE at the source base station are established. Correspondence.
  • the change cell response message further includes: a MAC and a physical layer-related configuration parameter configured by the target base station for the UE, when the user-side link of the UE is maintained in the source base station.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message further comprising: when the user of the changed cell is configured to keep the user plane of the UE in the source base station, according to the UE.
  • the UE ID that is sent when the cell is changed is used to confirm the identity of the UE, and sends a notification message to the source base station, where the notification message is used to inform the source base station that the UE has initiated access at the target base station.
  • the performing the handover of the UE according to the method of changing the cell indicated by the changed cell request message further includes:
  • the performing the handover of the UE according to the method of changing the cell indicated by the changed cell request message further includes:
  • the first indication is used to notify the UE to use the PDCP entity, the RLC entity, and the AS security of the source base station when the user plane of the UE is linked to the source base station.
  • NAS security for PDCP layer operation of data and signaling, RLC operation, AS security and NAS security encryption and decryption includes:
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: changing the cell response message when the user plane of the changed UE is linked to the target base station Also included is a context of the target base station side established for the UE.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: changing the cell response message when the user plane of the changed UE is linked to the target base station It also includes AS security information and NAS security information established by the target base station for the UE.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: when the changed cell mode is to transfer the user plane of the UE to the target base station, at the source base station and When the target base station shares the same core network node, the changed cell response message further includes the AS security information established by the target base station for the UE, does not include the NAS security information, and the identifier, where the identifier is used to notify the UE to reserve the source after the cell is changed.
  • the NAS security information of the cell is reused at the target base station
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: receiving, when the changed cell mode is a user plane that transfers the UE, to the target base station, receiving the source base station When the AS security completion message of the transparent UE is completed, the AS security negotiation is confirmed; when the NAS security completion message of the UE transparently transmitted by the source base station is received, the NAS security completion message is forwarded to the core network to complete the NAS security.
  • negotiation confirmation confirmation.
  • the performing the handover of the UE according to the changed cell mode indicated by the changed cell request message includes: when the user plane of the changed cell is linked to the target base station, receiving the UE initiated Receiving a process and receiving an AS context ID in the access process, confirming the identity of the UE and the established context of the UE, and feeding back a status transfer message to the UE, where the state transition message is used to indicate that the UE will Its own state is set to inactive or light connected.
  • the state transition message is used to indicate that the UE sets its own state to an inactive state; if the target base station is an LTE eNB, the state transition message is used to indicate that the UE is to be Its own state is set to light connected state.
  • a mobility management device may include:
  • the second receiving module 41 is configured to receive the changed cell request message from the source base station, where the changed cell request message carries at least the changed cell mode identifier, where the changed cell mode identifier indicates the changed cell mode determined by the source base station;
  • the second switching module 42 is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message;
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the second switching module 42 is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, including:
  • the second switching module 42 is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, including:
  • the changed cell response message further includes that the target base station is established for the UE.
  • the AS security information including the NAS security information and the identifier, is used to inform the UE to reserve the NAS security information of the source cell after the cell is changed to be reused at the target base station.
  • the second switching module 42 is configured to perform handover of the UE according to the changed cell mode indicated by the changed cell request message, including:
  • the changed cell mode is to transfer the user plane of the UE to the target base station, when receiving the AS security complete message of the UE transparently transmitted by the source base station, confirming that the AS security negotiation is completed; receiving the source base station When the NAS security completion message of the transparent UE is forwarded, the NAS security completion message is forwarded to the core network to complete the NAS security negotiation confirmation.
  • Yet another mobility management apparatus comprising: a processor and a memory, the memory storing computer executable instructions, the computer executable instructions being implemented by the processor to implement the following method:
  • the changed cell request message carries at least a changed cell mode identifier, where the changed cell mode identifier indicates a changed cell mode determined by the source base station;
  • the changing cell mode of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station.
  • the second receiving module and the second switching module may be implemented by software, hardware, or a combination of the two.
  • the second receiving module may be implemented by a communication unit in a base station or the like
  • the second switching module may be implemented by a combination of a processor, a communication unit, or the like in a base station or the like.
  • the mobility management apparatus of this embodiment may be implemented by being deployed on a base station or the like or directly by a UE or the like. In this regard, this article does not limit.
  • a mobility management method may include:
  • Step 501 Receive a change cell command message sent by the source base station, where the change cell command message is used to instruct the UE to initiate a change cell to the target base station, where the change cell command message carries at least the changed cell mode identifier determined by the source base station;
  • Step 502 Perform handover according to the changed cell mode indicated by the changed cell command message.
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the foregoing method of this embodiment may be implemented by a UE.
  • the target base station may satisfy one of the following: the associated radio access technology RAT and the source base station are of the same type; the associated radio access technology RAT is different from the source base station.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: obtaining, from the changed cell command message, a UE ID or an AS context ID allocated by the target base station to the UE; and initiating access to the target base station, The UE ID or AS context ID assigned to the UE by the target base station is reported to the target base station.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: changing the cell mode to keep the user plane link of the UE at the source base station, maintaining the state of the source base station, and saving the source in the source The context of the base station.
  • the maintaining the state of the source base station includes: maintaining the PDCP entity and the PDCP state of the source base station, the RLC entity and the RLC state, the AS security information, and the NAS security information.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes:
  • the mode of changing the cell is to stop the behavior of the corresponding item according to the changed cell command message when the user plane of the UE is linked to the source base station;
  • the behavior of the corresponding item includes one or more of the following:
  • Stopping periodic monitoring of the physical channel of the source base station (including: stopping monitoring of the source base station downlink control channel, the source base station paging channel, and the source base station system message);
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: changing the cell mode to keep the user plane link of the UE in the source base station, completing the access after the target base station, and transmitting and receiving
  • the data or signaling uses the PDCP entity, the RLC entity, the AS security information, and the NAS security information of the source base station maintained by itself to process the PDCP layer, the RLC layer operation, the AS encryption and decryption, the NAS encryption and decryption, and the integrity protection.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: changing the cell mode to keep the user plane of the UE from being connected to the source base station, and receiving the transparent transmission from the target base station After updating the AS security information or the NAS security information of the source base station, the updated AS security information or NAS security information is used to complete AS encryption and decryption, NAS encryption and decryption, and integrity protection of data or signaling.
  • the context of the target base station is established by the UE, the context of the target base station is obtained from the changed cell command message and stored; when the AS message is carried in the changed cell command message, according to the AS security
  • the information is completed by the AS security key negotiation, and the AS security completion message is sent to the target base station by the source base station when the key negotiation is successful; when the NAS message security information is carried in the changed cell command message, the NAS is completed according to the NAS security information.
  • the security key is negotiated, and the NAS security completion message is transparently transmitted through the source base station to the core connected to the target base station when the key negotiation is successful.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: changing the state of the source base station to the IDLE state when the user plane of the UE is transferred to the target base station.
  • the identifier of the changed cell command includes an identifier indicating that the UE retains the NAS security information of the source cell after the cell is changed, and the UE saves the NAS security information of the source cell after the cell is changed.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: when the user plane of the UE is transferred to the target base station, transferring the state of the source base station to the IDLE state, The target base station initiates access.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: receiving the state transition message from the target base station when the user plane of the UE is transferred to the target base station, and according to the The state transition message sets itself to the inactive state or the light connected state at the state of the target base station. If the target base station is a 5G-gNB, set the state of the target base station to an inactive state; if the target base station is an LTE eNB, set the state of the target base station to a light connected state.
  • the performing the handover according to the changed cell mode indicated by the changed cell command message includes: when the user mode of the UE is transferred to the target base station, the mode is changed to the state of the source base station after the handover is completed. IDLE state.
  • a mobility management device may include:
  • the third receiving module 61 is configured to receive a change cell command message sent by the source base station, where the change cell command message is used to instruct the UE to initiate a change cell to the target base station, where the change cell command message carries at least the changed cell determined by the source base station Mode identification
  • the third switching module 62 is configured to perform switching according to the changed cell mode indicated by the changed cell command message
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the mode of changing the cell is to keep the state of the source base station and keep the context of the source base station when the user plane of the UE is linked to the source base station;
  • the maintaining the state of the source base station includes: maintaining the PDCP entity and the PDCP state of the source base station, the RLC entity and the RLC state, the AS security information, and the NAS security information, and transferring the state of the source base station to the IDLE state.
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the mode of changing the cell is to stop the behavior of the corresponding item according to the changed cell command message when the user plane of the UE is linked to the source base station;
  • the behavior of the corresponding item includes one or more of the following:
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the method for changing the cell is to keep the PDCP entity and the RLC of the source base station that the UE itself maintains when transmitting and receiving data or signaling after the user plane of the UE is linked to the source base station.
  • Entity AS security information
  • NAS security information to handle PDCP layer
  • RLC layer operation AS encryption and decryption
  • NAS encryption and decryption integrity protection.
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the method for changing the cell is to use the update after receiving the update of the AS security information or the NAS security information from the source base station transparently transmitted by the target base station when the user plane of the UE is linked to the source base station.
  • AS security information or NAS security information completes AS encryption and decryption of data or signaling, NAS encryption and decryption, and integrity protection.
  • the third switching module 62 is configured to perform handover according to the changed cell mode indicated by the changed cell command message, including:
  • the changing cell mode is when the user plane of the UE is transferred to the target base station:
  • the changed cell command message When the changed cell command message carries the context of the target base station side established by the target base station for the UE, the context of the target base station side is obtained from the changed cell command message and stored;
  • the AS security key negotiation is performed according to the AS security information, and the AS security completion message is sent to the target base station by the source base station when the key key negotiation succeeds;
  • the NAS security key negotiation is completed according to the NAS security information, and the NAS security completion message is transparently transmitted to the core connected to the target base station through the source base station when the key key negotiation succeeds. network.
  • the third switching module 62 is configured to perform the handover according to the changed cell mode indicated by the changed cell command message, where the method for changing the cell is to transfer the user plane of the UE to the target base station, and complete After the handover, the UE is transferred to the state of the source base station to the IDLE state.
  • Another mobility management apparatus includes a processor and a memory, the memory storing computer executable instructions that, when executed by the processor, implement the following method:
  • the mode of changing the cell of the UE includes at least one of the following:
  • the user plane that transferred the UE is linked to the target base station.
  • the third receiving module and the third switching module may be implemented by software, hardware, or a combination of the two.
  • the third receiving module may be implemented by a communication unit in the UE or a similar device
  • the third switching module may be implemented by a combination of a processor, a communication unit, or the like in the UE or the like.
  • the mobility management apparatus of this embodiment may be implemented by being deployed on a UE or the like or directly by a UE or the like. In this regard, this article does not limit.
  • the scenario of the present example is: two neighboring base stations are respectively a 5G base station and an LTE base station, and a UE supporting both 5G and LTE moves from the 5G base station to the LTE base station, and the UE is in the inactive state at the 5G base station, when the UE is in the inactive state,
  • the RRC connection with the RAN is still maintained, and the signaling bearer and the data bearer are still maintained, but the difference from the RRC connected state is that the terminal and the RAN need to save the terminal context, the mobility of the terminal adopts the cell reselection mode, and the terminal monitors the RAN and the CN.
  • Paging The definition of the light connected state in LTE is similar to the inactive state in 5G.
  • FIG. 7 is an architectural diagram of the present example. As shown in FIG. 8, the mobility management process in this example may include:
  • step 701 the UE measures the signal quality of the current serving base station 5G-gNB and the neighboring cell, and reports the measurement result to the 5G-gNB when the measurement result satisfies the inter-RAT (extra system) switching condition.
  • inter-RAT extra system
  • Step 702 The current serving base station 5G-gNB determines to change the UE to a neighboring inter-system cell, that is, an LTE-based eNB.
  • the 5G-gNB decides which mobility architecture to adopt. If the service data of the UE is mainly infrequently small data, and the transmission is mostly performed in the inactive state; then the 5G-gNB may choose to leave the user plane anchor point in the 5G-gNB, and does not transfer to the LTE eNB because of the service model. Data transmission does not bring extra air interface overhead, but the cost is only an increase in the traffic between the two base stations.
  • the 5G-gNB can choose to leave the user plane anchor point at the 5G-gNB and not transfer to the LTE eNB. This avoids an additional LTE eNB to the 5G- gNB switching.
  • Step 703 The 5G-gNB sends a change cell request message to the target base station LTE eNB.
  • the cell change request message may adopt a structure similar to the LTE handover request message.
  • the part of the UE context related to the MAC scheduling, measurement, system message, and physical layer may be included in the changed cell request message.
  • the part related to the MAC scheduling, measurement, system message, and physical layer in the UE context may include one or more of the following:
  • E-RAB The established LTE radio access bearer (E-RAB) context (including the Qos parameters of each E-RAB);
  • the part of the AS configuration parameter related to MAC scheduling, measurement, system message, and physical layer for example, antenna information, radio resource configuration, downlink carrier frequency, etc.
  • the part related to MAC scheduling, measurement, system message, and physical layer in the RRM configuration parameter for example, terminal inactivity time (ue-InactiveTime);
  • Ports related to MAC scheduling, measurement, system messages, and physical layer in the AS context for example: power Preference Indication, connection reconstruction information;
  • the change cell request message may include a selection indication of the source cell 5G-gNB to change the cell mode, that is, select: The user plane anchor of the UE is moved to the target base station or remains at the source base station.
  • the changed cell request message may include an AS context ID allocated by the 5G-gNB to the UE, where the AS context ID is used to identify the identity of the UE and the context of the UE in the 5G-gNB. storage.
  • Step 704 The target base station eNB determines whether to accept the UE according to the received redirection cell request, and if not, feeds back the reject message; if accepting, allocates an UE ID within the eNB to the UE, and returns the changed cell. response.
  • the UE ID may be a Cell-Radio Network Temporary Identifier (C-RNTI) of the LTE system.
  • C-RNTI Cell-Radio Network Temporary Identifier
  • the target base station eNB may establish a MAC entity and a physical layer related configuration corresponding to the UE according to the context content of the UE included in the changed cell request, and establish the MAC entity and the UE in the 5G-gNB. Correspondence between PDCP and RLC entities.
  • the target base station eNB receives the UE, and may feed back the cell response message to the source base station 5G-gNB, where the changed cell response message includes the UE ID allocated by the eNB.
  • the changed cell response message may further include a MAC and physical layer related configuration parameter configured by the eNB for the UE.
  • Step 705 The source base station 5G-gNB sends a change cell command message to the UE, indicating that the UE can move to the target eNB, where the changed cell command message includes the UE ID allocated by the target eNB for the UE.
  • the changed cell command message includes an identifier of a mobility management architecture used by the current mobility process: selecting whether to keep the user plane anchor point at the source base station or moving to the target base station;
  • the UE in the changing cell command message, is instructed to stop periodic monitoring of the physical channel for the 5G-gNB, for example, stopping the 5G-gNB downlink control channel, the 5G-gNB paging channel, and the 5G-gNB Monitoring of system messages;
  • the UE is instructed to stop the RAN area notification update in the changed cell command message, unless the user plane anchor point of the UE changes;
  • the UE is instructed to stop the measurement at 5G-gNB in the changed cell command message.
  • step 706 the 5G-gNB still keeps the UE in an inactive state, and saves the context of the UE.
  • the UE learns the target base station of the changed cell according to the received change cell command message, and the architecture adopted by the mobility management, that is, the user plane anchor point is maintained at 5G-gNB, and the target base station eNB only completes the user plane.
  • the MAC layer scheduling function allows the UE to keep its own 5G-gNB inactive state and save its own 5G-gNB context.
  • the UE stops listening to the 5G-gNB downlink control channel, the 5G-gNB paging channel, and the 5G-gNB system message according to the received change cell command message; stops the RAN area notification update; stops at 5G- gNB measurement;
  • Step 707 The UE initiates access to the target base station eNB by using the UE ID allocated by the target base station eNB, and establishes an initial signaling bearer (SRB0, Signaling Radio Bearer 0) in the access process, and allocates the eNB to the UE ID of the UE.
  • SRB0 Signaling Radio Bearer 0
  • the message through SRB0 is reported to the eNB.
  • Step 708 The eNB confirms that the identity of the UE is the UE that has been moved from the 5G-gNB according to the received UE ID, and sends a notification to the 5G-gNB to inform the UE that the access has been initiated by the eNB.
  • step 709 the 5G-gNB sends a response message to the eNB.
  • the updated AS security information or NAS security information may be carried in the response message.
  • the eNB sends the UE layer-related configuration parameters, such as the DRX (Discontinuous Reception) and the Hybrid Automatic Repeat ReQuest (HARQ) parameters, to send physical layer related configuration parameters, such as physics, to the UE.
  • UE layer-related configuration parameters such as the DRX (Discontinuous Reception) and the Hybrid Automatic Repeat ReQuest (HARQ) parameters
  • physical layer related configuration parameters such as physics
  • PUCCH Physical Uplink Control CHannel
  • SRS Sounding Reference Signal
  • the eNB sends an indication to the UE to inform the UE that since the user plane anchor is still at the 5G-gNB, the user plane of the 5G-gNB (ie PDCP, RLC, is used in addition to the MAC and the physical layer, AS security) and control plane (NAS security, RRC signaling)
  • the user plane of the 5G-gNB ie PDCP, RLC, is used in addition to the MAC and the physical layer, AS security
  • control plane NAS security, RRC signaling
  • the eNB may delete the SRB0.
  • Step 712 UL/DL data/signaling and receiving, the UE uses the PDCP entity, the RLC entity, the AS security information, and the NAS security information of the eNB that it maintains to process the PDCP layer, the RLC layer operation, the AS encryption and decryption, the NAS encryption and decryption, and the integrity.
  • Sexual protection the UE uses the PDCP entity, the RLC entity, the AS security information, and the NAS security information of the eNB that it maintains to process the PDCP layer, the RLC layer operation, the AS encryption and decryption, the NAS encryption and decryption, and the integrity.
  • the UE uses the PDCP entity, the RLC entity, the AS security information, and the NAS security information of the eNB that it maintains to process the PDCP layer, the RLC layer operation, the AS encryption and decryption, the NAS encryption and decryption, and the integrity.
  • the UE uses the PDCP entity, the RLC entity,
  • the AS security information or the NAS security information is used to complete the AS encryption and decryption of the data or signaling. , NAS encryption and decryption, integrity protection.
  • the user plane anchor of the UE remains at the source base station 5G-gNB, that is, the source base station reserves the PDCP layer corresponding to the UE, the RLC layer, the RRC layer functional entity, and the target.
  • the base station LTE eNB only establishes a MAC layer function entity corresponding to the UE, and the user plane data and control plane signaling that the UE transmits and receives at the target base station eNB are transparently transmitted by the target base station eNB to the source base station 5G-gNB where the user plane anchor point is located for processing.
  • the target base station eNB is only responsible for performing MAC layer resource scheduling and MAC PDU grouping/unpacking.
  • the scenario of this example is the same as that of the example 1.
  • the UE moves from the 5G base station to the LTE base station, the UE performs handover by moving the user plane anchor point to the target base station.
  • the user plane anchor of the UE is transferred to the target base station, and the target base station establishes the context, AS connection, and core network connection of the UE in the target base station according to the UE context sent by the source base station; the source base station deletes after the handover is completed.
  • the context of the UE is the same as that of the example 1.
  • FIG. 9 is an architectural diagram of the present example. As shown in FIG. 10, the mobility management process of this example may include:
  • step 901 the UE measures the signal quality of the current serving base station 5G-gNB and the neighboring cell, and reports the measurement result to the 5G-gNB when it detects that the measurement result satisfies the inter-RAT (different system) switching condition.
  • inter-RAT different system
  • Step 902 The current serving base station 5G-gNB determines to move the UE to a neighboring inter-system cell, that is, an LTE-based eNB. 5G-gNB decides which mobility architecture to adopt.
  • the source base station 5G-gNB chooses to transfer the user plane anchor point to the target base station, which can reduce the traffic overhead of the base station interface and reduce Data end-to-end transmission delay.
  • Step 903 The 5G-gNB sends a handover cell request message to the handover target base station LTE eNB.
  • this process can be called inactive switching.
  • This message is called an inactive switching request.
  • This message is used to illustrate this switching.
  • the LTE-like handover request message may be used, and the inactive handover request message includes: the complete context of the UE;
  • the inactive handover request message may further include a PDCP state and an RLC state of the UE at the source base station, to ensure that the data transmission of the UE is switched to Continuity after the target base station;
  • the inactive handover request message includes a selection indication of the source base station 5G-gNB to change the cell mode, that is, the selection is: Moving the user plane anchor of the UE to the target base station or remaining at the source base station;
  • Step 904 The target base station eNB determines whether to accept the UE according to the received mobile request, and if not, feeds back the reject message; if accepted, allocates an UE ID within the eNB range.
  • the UE ID may be a C-RNTI (Cell-Radio Network Temporary Identifier) of the LTE system, or a resume ID (recovery identifier), where the resume ID is used to identify the UE at the target base station eNB.
  • C-RNTI Cell-Radio Network Temporary Identifier
  • resume ID recovery identifier
  • the eNB establishes a context corresponding to the UE, a user plane connection, a control plane connection, and a connection with the core network according to the context content of the UE included in the mobility request.
  • the target base station eNB receives the UE, and then feeds back the inactive handover response information to the source base station 5G-gNB, where the UE ID or the resume ID is included in the eNB.
  • the inactive handover response information is further The context of the target base station side established by the eNB for the UE is included.
  • the inactive handover response information further includes AS security information and NAS security information established by the target base station for the UE.
  • the source base station and the target base station of the different system may share the same EPC (Evolved Packet Core) core network node, and may share the same 5G NGC. (Next Generation Core, the next generation core network) core network node.
  • EPC Evolved Packet Core
  • 5G NGC Next Generation Core, the next generation core network
  • the base stations of the two different systems share the same EPC core network node, only the UP (User Plane user plane) interface exists between the 5G gNB and the EPC core network node; if two different system base stations share the same 5G NGC core network node
  • the CP (Control Plane) and the UP (User Plane User Plane) interface are provided between the 5G gNB and the eLTE (Evolved LTE) eNB and the 5G NGC core network node.
  • the UE sends the NAS security information, and the NAS security information of the UE at the source base station may be reused in the target base station.
  • the target base station may add an identifier to the inactive handover response message to inform the UE to retain the NAS security information after the handover is completed. It can be reused at the target base station.
  • the source base station 5G-gNB sends an inactive handover command message to the UE, indicating that the UE can move to the target eNB, where the inactive handover command message includes the UE ID or resume ID allocated by the target eNB for the UE.
  • the inactive handover command message includes an identifier of a mobility management architecture used by the current mobility procedure; that is, whether the selection is to move the user plane anchor point of the UE to the target base station, or remains in the Source base station.
  • the inactive handover command message includes an indication that the UE is required to delete the source base station context after completing the handover procedure.
  • the context, the AS security information, and the NAS security information established by the target base station in the step 404 are transmitted to the UE.
  • Step 907 The UE learns the target base station to be handed over according to the received inactive handover command message, and learns that the changed cell mode used in the current mobility management is a modified cell mode in which the user plane anchor point is transferred to the target base station.
  • the UE If the UE receives the context, AS security information, and NAS security information established by the target base station side for the UE in the inactive handover command message, the UE stores the context, and completes the AS security and the NAS security according to the AS security information and the NAS security information. Key negotiation process; the UE sends an AS security completion message and a NAS security completion message to the source base station.
  • Step 908 The source base station transparently transmits the AS and NAS security completion message to the target base station.
  • Step 909 The target base station receives the AS security completion message or the NAS security completion message forwarded by the source base station, confirms that the AS security negotiation is complete, and forwards the NAS security completion message to the core network to complete the NAS security negotiation process.
  • Step 910 The source base station 5G-gNB deletes the user plane connection and the control plane connection of the UE, deletes the context of the UE, and transfers the UE state to the IDLE state.
  • Step 911 corresponding to step 910, the UE deletes its own source base station 5G-gNB context, and transfers its own state to the IDLE state.
  • the UE if the UE receives the identifier sent by the target base station, and informs the UE that the NAS security information is retained after the handover is completed and can be reused in the target base station, the UE retains the NAS security information and does not delete the NAS security information.
  • step 912 the UE initiates an access to the target base station eNB.
  • the initial signaling bearer SRB0, Signaling Radio Bearer 0
  • SRB0 Signaling Radio Bearer 0
  • Step 913 The target base station eNB confirms that the identity of the UE is the UE that has been moved from the 5G-gNB according to the received UE ID or resume ID, and confirms that the context of the UE has been established, and the target base station eNB gives feedback to the UE.
  • Step 914 The UE sets the state of the eNB to light connected according to the state transition message sent by the target base station eNB.
  • the example scenario is the same as the example 1.
  • the UE moves from the 5G base station to the LTE base station in the process of moving the user plane anchor point to the target base station, and after the mobility process is completed, the UE user plane anchor point is completed.
  • Transfer to the target base station the target base station establishes the context, the AS connection, and the core network connection of the UE in the target base station according to the UE context sent by the source base station; the source base station saves the context of the UE after the handover is completed. Therefore, the UE can restore the connection with the 5G-gNB more efficiently after returning to the source base station 5G-gNB later.
  • FIG. 12 is an architectural diagram of the present example. As shown in FIG. 13, the mobility management process of this example may include:
  • Steps 1001 to 1002 are the same as steps 2 and 902 of the second embodiment.
  • Step 1003 is the same as step 903 of the example 2.
  • the redirected cell request message includes an AS context ID (access stratum context identifier) allocated by the 5G-gNB to the UE, where the AS context ID is used to identify the identity of the UE in the 5G-gNB. And storing the UE in a context of 5G-gNB;
  • AS context ID access stratum context identifier
  • Steps 1004 to 1005 are the same as steps 2 and 904 to 905 of the example 2.
  • Step 1006 the same as step 2 of step 906.
  • the suspend flag is included in the inactive switch command message, and is used to notify the UE to save the context of the 5G-gNB after completing the handover process.
  • Steps 1007 to 1009 are the same as steps 2 and 909 of Example 2.
  • the source base station 5G-gNB deletes the user plane connection and the control plane connection of the UE, but saves the context of the UE, and transfers the UE state to the IDLE state.
  • Step 1011 Correspondingly, the UE saves its own source base station 5G-gNB context, and transfers its own state in the 5G-gNB state to the IDLE state.
  • Steps 1012 to 1014 are the same as steps 2 and 914 to 914 of the example 2.
  • step 1015 if the UE returns to the coverage of the 5G-GNB again, the UE may report the AS context ID allocated to the UE before the 5G-gNB in the process of accessing the 5G-gNB, the 5G-gNB The saved context of the UE may be queried, and the 5G-gNB may restore the AS connection and the core network connection of the UE according to the context of the UE, or migrate the UE to the inactive state.
  • the type of the access network element includes, in addition to the LTE eNB, the 5G gNB, the small cell, the home base station, and other access network element types compatible with the EPC architecture.
  • the core network element type includes core network elements such as C-SGN, NBIoT MME, and 5G CN core that support 5G systems, machine type communication, and mobility management.
  • the embodiment of the present invention further provides a mobility management apparatus, including: a processor and a memory, wherein the memory stores computer executable instructions, and the computer executable instructions are executed by the processor to perform the mobility management method .
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, and the computer executable instructions are implemented to implement the mobility management method described above.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing another mobility management method described above.
  • the embodiment of the present application further provides a computer readable storage medium, where computer executable instructions are stored, and the computer executable instructions are executed to implement the foregoing mobility management method.
  • the foregoing storage medium may include, but not limited to, a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • mobile hard disk a magnetic disk
  • magnetic disk a magnetic disk
  • optical disk a variety of media that can store program code.
  • the processor executes the method steps of the above embodiments in accordance with program code already stored in the storage medium.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the mode of the changed cell of the UE is determined; and the UE is executed according to the determined changed cell mode.
  • the handover mode of the UE includes at least one of: maintaining a user plane of the UE at a source base station; and transferring a user plane of the UE to a target base station.

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Abstract

本发明公开了一种移动性管理方法、装置及存储介质，所述方法包括：在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述用户设备UE的改换小区方式；根据所述确定的改换小区方式执行所述UE的切换；所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。本申请实现了inactive状态或者light connected状态下在LTE和5G New RAT之间的移动性管理。

Description

移动性管理方法、装置及存储介质
相关申请的交叉引用
本申请基于申请号为201710179843.6、申请日为2017年03月23日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及通信领域，尤其涉及移动性管理方法、装置及存储介质。
背景技术
在目前第三代合作伙伴项目(3GPP，the 3rd Generation Partnership Project)讨论的长期演进(Long Term Evaluation，LTE)标准和5G new无线接入网(Radio Access Network，RAN)标准中，分别在LTE引入了轻连接(light connected)状态，在5G new无线接入技术(RAT，Radio Access Technology)引入了不活跃(inactive)状态，这2个状态的本质类似，对LTE RAN和5G RAN来说，light connected状态和inactive状态均属于无线资源控制(RRC，Radio Resource Control)连接态的子状态，终端若处于light connected状态或inactive状态时，其与RAN的RRC连接仍然保持，信令承载和数据承载仍然保持，但与RRC连接态的区别在于：终端和RAN需保存终端上下文，终端的移动性采用小区重选方式，终端监听RAN和核心网(CN，Core Network)的寻呼。上述2个新状态的引入可以部分减少终端的耗电以及终端从空闲(IDLE)态到连接态的切换次数，从而减少部分信令开销。
LTE和5G new RAT中新状态的引入带来了新问题。由于相关技术中网络之间的切换并未涉及LTE和5G new RAT中的新状态，因而无法适用于 此场景下。针对LTE和5G的RRC新状态下LTE和5G基站之间移动性管理的问题，相关技术中尚未提出有效的解决方案。
发明内容
有鉴于此，本发明实施例期望提供一种移动性管理方法、装置及存储介质。
本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种移动性管理方法，包括：
在inactive态或light-connected态的用户设备(UE，User Equipment)满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式；
根据所述确定的改换小区方式执行所述UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述目标基站满足如下之一：
所属RAT与源基站为同一类；
所属RAT与源基站不同类。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式。
其中，向所述目标基站发送改换小区请求消息，所述改换小区请求消息还包括：源基站分配给所述UE的接入层上下文标识AS(Access Stratum)context ID(Identification)，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述目标基站分配给所述UE的UE ID或AS context ID。
其中，在改换小区方式为保持UE的用户面链接在源基站时，向所述UE发送改换小区命令消息，所述改换小区命令消息还用于指示所述UE停止下述行为之一或多项：
在改换小区过程完成后停止针对源基站的物理信道的周期性监听；
停止RAN区域更新(RAN area notification update)；
停止对源基站的测量。
其中，根据所述确定的改换小区方式执行所述UE的切换，包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述UE的分组数据汇聚协议(PDCP，Packet Data Convergence Protocol)层、无线链路层控制协议(RLC，Radio Link Control)层、RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，以便目标基站只完成所述UE所收发的数据和信令的介质访问控制(MAC，Media Access Control)层操作。
其中，根据所述确定的改换小区方式执行所述UE的切换，包括：
在改换小区方式为保持UE的用户面链接在源基站时，向所述目标基站发送改换小区请求消息,所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、RLC、安全相关的上下文部分。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保持所述UE为inactive状态，并保存所述UE的上下文。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括如下之一或两项：在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自目标基站的通知消息，所述通知消息用于告知所述源基站所述UE已在目标基站接入；在获知UE已在目标基站接入后，向所述目标基站发送给所述UE的更新的AS安全信息或非接入层(NAS，Non-Access Stratum)安全信息。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起指示，所述挂起指示用于指示UE在完成改换小区后保存源基站上下文，向UE发送改换小区命令消息之外，保存所述UE的源基站侧上下文。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，向UE发送改换小区命令消息，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
一种移动性管理装置，包括：
第一确定模块，配置为在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式；
第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
向所述目标基站发送改换小区请求消息，所述改换小区请求消息包括：源基站分配给所述UE的AS context ID，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
其中，所述述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；
向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述目标基站分配给所述UE的UE ID或AS context ID。
其中，在改换小区方式为保持UE的用户面链接在源基站时，向所述UE发送改换小区命令消息，所述改换小区命令消息还用于指示所述UE停止下述行为之一或多项：
在改换小区过程完成后停止针对源基站的物理信道的周期性监听；
停止RAN区域更新(RAN area notification update)；
停止对源基站的测量。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述UE的PDCP层、RLC层、RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，以便目标基站只完成所述UE所收发的数据和信令的MAC层操作。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
在改换小区方式为保持UE的用户面链接在源基站时，向所述目标基站发送改换小区请求消息,所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、RLC、安全相关的上下文部分。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保持所述UE为inactive状态，并保存所述UE的上下文。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自目标基站的通知消息，并向所述目标基站返回响应消息，所述通知消息用于告知所述源基站所述UE已在目标基站接入，所述响应消息中携带给所述UE的更新的AS安全信息或NAS安全信息。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起指示，所述挂起指示用于指 示UE在完成改换小区后保存源基站上下文，向UE发送改换小区命令消息后，保存所述UE的源基站侧上下文。
其中，所述第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，向UE发送改换小区命令消息，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
一种移动性管理方法，包括：
接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
根据所述改换小区请求消息指示的改换小区方式，执行UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的给所述UE的更新的AS安全信息或NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，向所述源基站发送改换小区响应消息，所述改换小区响应消息包含目标基站为UE建立的AS安全信息、以及NAS安全信息保持标识，所述NAS安全信息保持标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站 重用。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
一种移动性管理装置，包括：
第二接收模块，配置为接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
第二切换模块，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第二切换模块，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的响应消息，所述响应消息携带更新的AS安全信息或NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
其中，所述第二切换模块，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，向所述源基站发送改换小区响应消息，所述改换小区响应消息包含目标基站为UE建立的AS安全信 息、不包括NAS安全信息以及标识，所述标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站重用。
其中，所述第二切换模块，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
一种移动性管理方法，包括：
接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
根据所述改换小区命令消息指示的改换小区方式，执行切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
从所述改换小区命令消息中获取目标基站为UE分配的UE ID或AS context ID；
向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己 在源基站的状态，保存自己在源基站的上下文。
其中，所述保持自己在源基站的状态包括：保持自己在源基站的PDCP实体及PDCP状态、RLC实体及RLC状态、AS安全信息、NAS安全信息，转移自己在源基站的状态至空闲(IDLE)态。
所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换过程后转移自己在源基站的状态至IDLE态；
其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
其中，所述对应项的行为包括如下之一或多项：
停止针对源基站的物理信道的周期性监听；
停止RAN区域更新；
停止对源基站的测量。
其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用自己保持的所述源基站的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，在接入所述目标基站后，若接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信 息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为转移所述UE的用户面链接到目标基站时：
若收到的所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；
若收到的所述改换小区命令消息中携带所述目标基站为所述UE生成的AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；
若收到的所述改换小区命令消息中携带所述目标基站所连接的核心网生成的NAS安全信息时，根据所述NAS安全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接的核心网。
一种移动性管理装置，包括：
第三接收模块，配置为接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
从所述改换小区命令消息中获取目标基站为UE分配的UE ID或AS context ID；
向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己在源基站的状态，保存自己在源基站的上下文；
其中，所述保持自己在源基站的状态包括：保持自己在源基站的PDCP实体及PDCP状态、RLC实体及RLC状态、AS安全信息、NAS安全信息，转移自己在源基站的状态至IDLE态。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
其中，所述对应项的行为包括如下之一或多项：
停止针对源基站的物理信道的周期性监听；停止RAN区域更新；
停止对源基站的测量。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用UE自身保持的所述源基站的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的 改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，在接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为转移所述UE的用户面链接到目标基站时：
在所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；
在所述改换小区命令消息中携带AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；
在所述改换小区命令消息中携带NAS安全信息时，根据所述NAS安全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接的核心网。
其中，所述第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换后转移UE在源基站的状态至IDLE态。
一种移动性管理装置，包括：处理器和存储器，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现如下方法：
在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述用户设备UE的改换小区方式；
根据所述确定的改换小区方式执行所述UE的切换；
其中，所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站；
或者，所述计算机可执行指令被所述处理器执行时实现如下方法：
接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
根据所述改换小区请求消息指示的改换小区方式，执行UE的切换；
所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站；
或者，所述计算机可执行指令被所述处理器执行时实现如下方法：
接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
根据所述改换小区命令消息指示的改换小区方式，执行切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
本发明实施例还提供了一种移动性管理装置，包括：处理器和存储器，其中，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行上述移动性管理方法。
本发明实施例还提供了一种一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行上述的移动性管理方法。
本发明实施例中的移动性管理方法及装置，实现了inactive状态或者light connected状态下在LTE和5G New RAT之间的移动性管理，解决了 LTE和5G的RRC新状态下LTE和5G基站之间移动性管理的问题。
附图说明
附图用来提供对本发明技术方案的理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本发明的技术方案，并不构成对本发明技术方案的限制。
图1为本发明实施例一移动性管理方法的流程示意图；
图2为本发明实施例一移动性管理装置的组成结构示意图；
图3为本发明实施例二移动性管理方法的流程示意图；
图4为本发明实施例二移动性管理装置的组成结构示意图；
图5为本发明实施例三移动性管理方法的流程示意图；
图6为本发明实施例三移动性管理装置的组成结构示意图；
图7为实例1的改换小区架构图；
图8为实例1的移动性管理流程图；
图9为实例2的一种改换小区架构图；
图10为实例2的移动性管理流程图；
图11为实例2中源基站和目标基站共用同一个核心网节点的示意图；
图12为实例3的改换小区架构图；
图13为实例3的移动性管理流程图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白，下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况 下，可以以不同于此处的顺序执行所示出或描述的步骤。
inactive状态或者light connected状态下的UE在LTE小区和5G小区之间移动的移动性管理如何解决。相关技术中，不同RAT之间的移动性可以作为参考，例如LTE和码分多址(CDMA，Code Division Multiple Access)之间的切换，LTE和全球移动通信系统(GSM，Global System for Mobile Communication)之间的切换，LTE和时分同步码分多址(TD-SCDMA，Time Division-Synchronous Code Division Multiple Access)之间的切换。但这些切换都没有考虑目前LTE和5G所引入的新状态。
针对LTE和5G的RRC新状态下LTE和5G基站之间移动性管理的问题，本申请提供了inactive状态或者light connected状态下在LTE和5G New RAT之间的移动性管理方法及装置。
实施例一
一种移动性管理方法，如图1所示，可以包括：
步骤101，在不活跃态或轻连接态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式。
步骤102，根据所述确定的改换小区方式执行所述UE的切换。
其中，所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。
实际应用中，本实施例的上述方法可以通过源基站实现。实际应用中，所述目标基站满足如下之一：所属无线接入技术RAT与源基站为同一类；所属无线接入技术RAT与源基站不同类。
实际应用中，所述确定所述UE的改换小区方式，包括：在所述UE的业务类型为不频繁小数据或判断所述UE为短暂离开覆盖范围时，确定改换小区方式为保持UE的用户面链接在源基站；在所述UE的业务类型不是所述不频繁小数据且判断所述UE不是短暂离开覆盖范围时，确定改换小区方 式为转移所述UE的用户面链接到目标基站。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式，也就是说改换小区方式标识用于标识源基站要求采用哪种改换小区方式。
这里，所述改换小区请求消息还可以包括：源基站分配给所述UE的接入层上下文标识，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述目标基站分配给所述UE的UE ID或AS context ID。
其中，在所述改换小区方式为保持所述UE的用户面链接在源基站时，所述改换小区命令消息还可以用于指示所述UE停止下述行为之一或多项：
在改换小区过程完成后停止针对源基站的物理信道的周期性监听(例如，可以包括：停止对源基站下行控制信道、源基站寻呼信道、源基站系统消息的监听等)；
停止RAN区域更新(RAN area notification update)；
停止对源基站的测量。
其中，根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述 UE的PDCP层、RLC层、RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，如此，目标基站只完成所述UE所收发的数据和信令的MAC层操作，即MAC层资源调度和MAC协议数据单元(PDU，Protocol Data Unit)组包/解包。
其中，根据所述确定的改换小区方式执行所述UE的切换，包括：在改换小区方式为保持UE的用户面链接在源基站时，所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、RLC、安全相关的上下文部分，
其中，所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分包括如下之一或其组合：
UE累积最大比特速率(UE Aggregate Maximum Bit Rate)；
已建立的无线接入承载上下文(包括各个无线接入承载的Qos参数)；
UE的无线接入能力信息；
AS配置参数中与MAC调度、测量、系统消息、物理层相关的部分(例如，天线信息，无线资源配置，下行载频等)；
无线资源管理(RRM，Radio Resource Management)配置参数中与MAC调度、测量、系统消息、物理层相关的部分(例如，终端不活动时间(ue-InactiveTime))；
AS上下文中与MAC调度、测量、系统消息、物理层相关的部分(例如，省电倾向指示(power Preference Indication)，连接重建信息等)；
移动性限制列表(包含服务公共陆地移动网络(PLMN，Public Land Mobile Network)，等效PLMN，禁止接入的PLMN)。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，还可以包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，向所述UE发送改换小区命令消息后，保持所述UE为inactive状态，并保存所 述UE的上下文。这里，所述保持所述UE为inactive状态可以包括：保持所述UE在源基站的PDCP实体及PDCP状态、RLC实体及RLC状态、AS安全信息、NAS安全信息。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，还包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，向所述UE发送改换小区命令消息后，接收来自目标基站的通知消息，并向所述目标基站返回响应消息，所述通知消息用于告知所述源基站所述UE已在目标基站发起接入，所述响应消息中携带给所述UE的更新的AS安全信息或NAS安全信息。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，确认改换小区的目标小区后，所述改换小区请求消息还包括UE在源基站的PDCP状态和RLC状态。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息后，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起(suspend)指示，所述挂起指示用于指示UE在完成改换小区流程后保存源基站上下文。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收到所述UE反馈的AS安全消息或NAS安全完成消息时，将所述AS安全消息 或NAS安全完成消息透传给目标基站。
一种移动性管理装置，如图2所示，可以包括：
第一确定模块21，配置为在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述用户设备UE的改换小区方式；
第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式。
其中，所述改换小区请求消息还包括：源基站分配给所述UE的接入层上下文标识，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：
接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；
向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述 目标基站分配给所述UE的UE ID或AS context ID。
其中，在改换小区方式为保持UE的用户面链接在源基站时，所述改换小区命令消息还用于指示所述UE停止下述行为之一或多项：
在改换小区过程完成后停止针对源基站的物理信道的周期性监听；
停止RAN区域更新；
停止对源基站的测量。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述UE的PDCP层、RLC层、RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，以便目标基站只完成所述UE所收发的数据和信令的MAC层操作。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在改换小区方式为保持UE的用户面链接在源基站时，所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、RLC、安全相关的上下文部分。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，保持所述UE为inactive状态，并保存所述UE的上下文。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自目标基站的通知消息，并向所述目标基站返回响应消息，所述通知消息用于告知所述源基站所述UE已在目标基站发起接入，所述响应消息中携带给所述UE的更新的AS安全信息或NAS安全信息。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起指示，所述挂起指示用于指示UE在完成改换小区后保存源基站上下文，向UE发送改换小区命令消息后，保存所述UE的源基站侧上下文；或者，在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，并删除所述UE的源基站侧上下文。
其中，所述第一切换模块22，配置为根据所述确定的改换小区方式执行所述UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
又一种移动性管理装置，包括：处理器和存储器，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现如下方法：
在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述用户设备UE的改换小区方式；
根据所述确定的改换小区方式执行所述UE的切换；
其中，所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。
本实施例中，第一确定模块和第一切换模块可以通过软件、硬件或两者结合的方式实现。实际应用中，第一确定模块可以通过基站或类似设备中的通信单元实现，第一切换模块可以通过基站或类似设备中的处理器、通信单元等结合实现。本实施例的移动性管理装置可以通过部署于基站或类似设备上实现或直接由UE或类似设备来实现。对此，本文不作限制。
本实施例的上述两种移动性管理装置均可实现本实施例方法的所有细节，其实现原理相同，可参照上文方法的相关记载。
实施例二
一种移动性管理方法，如图3所示，可以包括：
步骤301，接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
步骤302，根据所述改换小区请求消息指示的改换小区方式，执行UE的切换。
其中，所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。
实际应用中，本实施例的上述方法可以通过目标基站实现。实际应用中，所述目标基站可以满足如下之一：所属RAT与源基站为同一类；所属RAT与源基站不同类。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：根据所述改换小区请求消息，确认接纳所述UE后，为所述UE分配一个UE ID用于标识UE在目标基站的身份；或者，为所述UE分配一个AS context ID用于同时标识UE在目标基站的身份以及UE在目标基站的上下文存储。
其中，所述接收来自源基站的改换小区请求消息之后，还包括：目标基站确认接纳所述UE改换小区后，向源基站反馈改换小区响应消息，所述改换小区响应消息包含目标基站分配给所述UE的UE ID或者AS context ID。
其中，，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为所述UE的用户面链接保持在源 基站时，确定接纳UE的改换小区后，根据所述改换小区请求消息包含的UE的上下文内容，建立对应所述UE的MAC实体、物理层相关的配置，并建立所述MAC实体和所述UE在源基站的PDCP、RLC实体的对应关。
其中，在所述改换小区方式为所述UE的用户面链接保持在源基站时，所述改换小区响应消息还包括：目标基站为所述UE配置的MAC和物理层相关的配置参数。其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，还包括：在所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述UE在接入改换小区时发送的UE ID确认UE的身份，并发送通知消息给所述源基站，所述通知消息用于告知所述源基站所述UE已在目标基站发起接入。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，还包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的响应消息，所述响应消息携带更新的AS安全信息或NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，还包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，发送第一指示给UE，所述第一指示用于告知UE使用所述源基站的PDCP实体、RLC实体、AS安全、NAS安全进行数据和信令的PDCP层操作、RLC操作，AS安全和NAS安全的加密解密。其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为转移所述UE的用户面链接到目标基站时，确定接纳所述UE的改换小区要求后，根据改换小区请求消息中包含的UE的上下文内容，建立对应该UE的完整上下文、用户面连接、控制面连接、与核 心网的连接。其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，所述改换小区响应消息还包括为所述UE建立的目标基站侧的上下文。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，所述改换小区响应消息还包含目标基站为UE建立的AS安全信息、NAS安全信息。其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，所述改换小区响应消息还包含目标基站为UE建立的AS安全信息、不包括NAS安全信息以及标识，所述标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站重用
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收到UE发起的接入过程且在接入过程中接收到AS context ID，确认所述UE的身份和已建立的所述UE的上下文，向UE反馈状态转移消息，所述状态转移消息用于指示所述UE将其自身状态置为inactive态或者light connected态。具体的，如果目标基站是5G-gNB，所述状态转移消息用于指示所述UE将其自身状态置为inactive态；如果目标基站是LTE eNB， 所述状态转移消息用于指示所述UE将其自身状态置为light connected态。
一种移动性管理装置，如图4所示，可以包括：
第二接收模块41，配置为接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
第二切换模块42，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第二切换模块42，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的响应消息，所述响应消息携带更新的AS安全信息或NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
其中，所述第二切换模块42，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，所述改换小区响应消息还包含目标基站为UE建立的AS安全信息、不包括NAS安全信息以及标识，所述标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站重用。
其中，所述第二切换模块42，配置为根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接 收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
又一种移动性管理装置，包括：处理器和存储器，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现如下方法：
接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
根据所述改换小区请求消息指示的改换小区方式，执行UE的切换；
所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。
本实施例中，第二接收模块和第二切换模块可以通过软件、硬件或两者结合的方式实现。实际应用中，第二接收模块可以通过基站或类似设备中的通信单元实现，第二切换模块可以通过基站或类似设备中的处理器、通信单元等结合实现。本实施例的移动性管理装置可以通过部署于基站或类似设备上实现或直接由UE或类似设备来实现。对此，本文不作限制。
本实施例的上述两种移动性管理装置均可实现本实施例方法的所有细节，其实现原理相同，可参照上文方法的相关记载。
实施例三
一种移动性管理方法，如图5所示，可以包括：
步骤501，接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
步骤502，根据所述改换小区命令消息指示的改换小区方式执行切换。
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
实际应用中，本实施例的上述方法可以通过UE实现。实际应用中，所述目标基站可以满足如下之一：所属无线接入技术RAT与源基站为同一类；所属无线接入技术RAT与源基站不同类。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：从所述改换小区命令消息中获取目标基站为UE分配的UE ID或AS context ID；向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己在源基站的状态，保存自己在源基站的上下文。
其中，所述保持自己在源基站的状态包括：保持自己在源基站的PDCP实体及PDCP状态、RLC实体及RLC状态、AS安全信息、NAS安全信息。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
其中，所述对应项的行为包括如下之一或多项：
停止针对源基站的物理信道的周期性监听(包括：停止对源基站下行控制信道、源基站寻呼信道、源基站系统消息的监听。)；
停止RAN区域更新；
停止对源基站的测量。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包 括：所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用自己保持的所述源基站的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为保持所述UE的用户面链接在源基站时，在接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时：在所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；在所述改换小区命令消息中携带AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；在所述改换小区命令消息中携带NAS安全信息时，根据所述NAS安全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接的核心。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，转移自己在源基站的状态至IDLE态。
其中，在所述改换小区命令消息中包含指示UE在改换小区完成后保留源小区的NAS安全信息的标识，则UE在改换小区完成后保存源小区的NAS安全信息。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包 括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述改换小区命令消息中携带挂起指示时，根据所述挂起指示保存源基站侧上下文；在所述改换小区命令消息未携带挂起指示时，删除源基站侧上下文。其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，转移自己在源基站的状态至IDLE态，向所述目标基站发起接入。其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的状态转移消息，并根据所述状态转移消息将自身在所述目标基站的状态置为inactive态或light connected态。如果目标基站是5G-gNB，将自身在所述目标基站的状态置为inactive态；如果目标基站是LTE eNB，将自身在所述目标基站的状态置为light connected态。
其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换后转移自己在源基站的状态至IDLE态。
一种移动性管理装置，如图6所示，可以包括：
第三接收模块61，配置为接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示 的改换小区方式执行切换，包括：
从所述改换小区命令消息中获取目标基站为UE分配的UE ID或AS context ID；
向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己在源基站的状态，保存自己在源基站的上下文；
其中，所述保持自己在源基站的状态包括：保持自己在源基站的PDCP实体及PDCP状态、RLC实体及RLC状态、AS安全信息、NAS安全信息，转移自己在源基站的状态至IDLE态。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
其中，所述对应项的行为包括如下之一或多项：
停止针对源基站的物理信道的周期性监听；停止RAN区域更新；
停止对源基站的测量。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用UE自身保持的所述源基站的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为保持所述UE的用户面链接在源基站时，在接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
所述改换小区方式为转移所述UE的用户面链接到目标基站时：
在所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；
在所述改换小区命令消息中携带AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；
在所述改换小区命令消息中携带NAS安全信息时，根据所述NAS安全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接的核心网。
其中，所述第三切换模块62，配置为根据所述改换小区命令消息指示的改换小区方式执行切换，包括：所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换后转移UE在源基站的状态至IDLE态。
另一种移动性管理装置，包括：处理器和存储器，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现如下方法：
接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指 示UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
根据所述改换小区命令消息指示的改换小区方式，执行切换；
所述UE的改换小区方式至少包括如下之一：
保持所述UE的用户面链接在源基站；
转移所述UE的用户面链接到目标基站。
本实施例中，第三接收模块和第三切换模块可以通过软件、硬件或两者结合的方式实现。实际应用中，第三接收模块可以通过UE或类似设备中的通信单元实现，第三切换模块可以通过UE或类似设备中的处理器、通信单元等结合实现。本实施例的移动性管理装置可以通过部署于UE或类似设备上实现或直接由UE或类似设备来实现。对此，本文不作限制。
本实施例的上述两种移动性管理装置均可实现本实施例方法的所有细节，其实现原理相同，可参照上文方法的相关记载。
下面以如下三个实例为例详细说明本申请。
实例1
本实例的场景为：两个相邻基站分别为5G基站和LTE基站，一个同时支持5G和LTE的UE从5G基站向LTE基站移动，UE在5G基站处于inactive状态，当UE处于inactive状态时，其与RAN的RRC连接仍然保持，信令承载和数据承载仍然保持，但与RRC连接态的区别在于：终端和RAN需保存终端上下文，终端的移动性采用小区重选方式，终端监听RAN和CN的寻呼。light connected状态在LTE中的定义与5G中的inactive态类似。
本实例对UE从5G基站移动到LTE基站的移动性管理进行详细描述，图7为本实例的架构图。如图8所示，本实例中移动性管理过程可以包括：
步骤701，UE测量当前服务基站5G-gNB和邻区的信号质量，当检测 到测量结果满足inter-RAT(异系统)切换条件，向5G-gNB上报测量结果。
步骤702，当前服务基站5G-gNB确定要将UE改换到相邻的异系统小区，即LTE制式的eNB。
5G-gNB决定采用哪种移动性架构。如果UE的业务数据主要为不频繁的小数据，其传输多在inactive态进行；那么5G-gNB可以选择将用户面锚点留在5G-gNB，不转移到LTE eNB，因为这种业务模型的数据传输不会带来额外空口开销，代价只是2个基站之间接口的流量增加。
如果UE只是短暂离开5G-gNB小区，短时间内会返回，那么5G-gNB可以选择将用户面锚点留在5G-gNB，不转移到LTE eNB，这样可避免额外做一次LTE eNB向5G-gNB的切换。
步骤703，5G-gNB向目标基站LTE eNB发送改换小区请求消息。
实际应用中，改换小区请求消息可以采用类似LTE的切换请求消息的结构。
在所述改换小区请求消息中可以包含：UE上下文中与MAC调度、测量、系统消息、物理层相关的部分。
其中，UE上下文中与MAC调度、测量、系统消息、物理层相关的部分可以包括下述的一项或者多项：
UE累积最大比特速率(UE Aggregate Maximum Bit Rate)；
已建立的LTE无线接入承载(E-RAB，E-UTRAN Radio Access Bearer)上下文(包括各个E-RAB的Qos参数)；
UE的无线接入能力信息；
AS配置参数中与MAC调度、测量、系统消息、物理层相关的部分(例如：天线信息，无线资源配置，下行载频等)；
RRM配置参数中与MAC调度、测量、系统消息、物理层相关的部分，例如：终端不活动时间(ue-InactiveTime)；
AS上下文中与MAC调度、测量、系统消息、物理层相关的部分，例如：省电倾向指示(power Preference Indication)，连接重建信息；
移动性限制列表，其中包含服务PLMN，等效PLMN，禁止接入的PLMN等。
此外，如果源基站5G-gNB和目标LTE eNB支持多种改换小区方式，在一实施例中，在改换小区请求消息中可以包含源基站5G-gNB对改换小区方式的选择指示，即：是选择将UE的用户面锚点移动到目标基站，还是保留在源基站。
在一实施例中，在改换小区请求消息中可以包含5G-gNB分配给所述UE的AS context ID，所述AS context ID用来标识所述UE的身份以及所述UE在5G-gNB的上下文存储。
步骤704，目标基站eNB根据收到的改换小区请求，判断是否接纳所述UE，如果不接纳，则反馈拒绝消息；如果接纳，则为所述UE分配一个eNB范围内的UE ID，返回改换小区响应。
实际应用中，UE ID可以是LTE制式的小区级无线网临时标识(C-RNTI，Cell-Radio Network Temporary Identifier)。
在一实施例中，目标基站eNB可以根据改换小区请求中包含的UE的上下文内容，建立对应该UE的MAC实体、物理层相关的配置，并建立所述MAC实体和该UE在5G-gNB的PDCP、RLC实体的对应关系。
实际应用中，目标基站eNB接纳了UE，可以向源基站5G-gNB反馈改换小区响应消息，所述改换小区响应消息中包含eNB分配的所述UE ID。这里，所述改换小区响应消息还可以包含eNB为UE配置的MAC和物理层相关的配置参数。
步骤705，源基站5G-gNB向UE发送改换小区命令消息，指示UE可以向目标eNB移动，所述改换小区命令消息包含目标eNB为UE分配的 UE ID。
在一实施例中，在所述改换小区命令消息中包括本次移动性过程所采用的移动性管理架构的标识：即选择将用户面锚点保留在源基站还是移动到目标基站；
在一实施例中，在所述改换小区命令消息中指示UE停止针对5G-gNB的物理信道的周期性监听，例如：停止对5G-gNB下行控制信道、5G-gNB寻呼信道、5G-gNB系统消息的监听；
在一实施例中，在所述改换小区命令消息中指示UE停止RAN area notification update，除非UE的用户面锚点发生改变；
在一实施例中，在所述改换小区命令消息中指示UE停止在5G-gNB的测量。
步骤706，5G-gNB仍然保持所述UE为inactive状态，保存该UE的上下文。
与之对应的，UE根据收到的改换小区命令消息，获知改换小区的目标基站，以及本次移动性管理采用的架构，即用户面锚点保持在5G-gNB，目标基站eNB仅完成用户面的MAC层调度功能，则UE保持自己在5G-gNB为inactive状态，保存自己的5G-gNB上下文。
在一实施例中，UE根据收到的改换小区命令消息，停止对5G-gNB下行控制信道、5G-gNB寻呼信道、5G-gNB系统消息的监听；停止RAN area notification update；停止在5G-gNB的测量；
步骤707，UE使用目标基站eNB分配的UE ID向目标基站eNB发起接入，在接入过程中，建立初始信令承载(SRB0，Signaling Radio Bearer 0)，将所述eNB分配给UE的UE ID通过SRB0的消息上报给eNB。
步骤708，eNB根据收到的UE ID确认UE的身份为前述已经接纳的从5G-gNB移动过来的UE，则发送通知给5G-gNB以告知UE已经在eNB发 起接入。
步骤709，5G-gNB向eNB发送响应消息，在实际应用中，可以在响应消息中携带更新的AS安全信息、或NAS安全信息。
步骤710，eNB给UE MAC层相关配置参数，例如不连续接收(DRX，Discontinuous Reception)、混合自动重传请求(HARQ，Hybrid Automatic Repeat reQuest)等参数，给UE发送物理层相关配置参数，例如物理上行链路控制信道(PUCCH，Physical Uplink Control CHannel)、上行导频参考信号(SRS，Sounding Reference Signal)等。
在一实施例中，如果有5G-gNB发给UE的AS安全信息或NAS安全信息的更新，则将之透传给UE；
在一实施例中，eNB发送指示给UE，以告知UE，因为用户面锚点仍在5G-gNB，因此除了MAC和物理层之外，仍使用5G-gNB的用户面(即PDCP，RLC，AS安全)和控制面(NAS安全，RRC信令)
步骤711，eNB可删除SRB0。
步骤712，UL/DL数据/信令收发，UE使用自己保持的eNB的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
在一实施例中，如果UE收到步骤710中5G-gNB发给UE的AS安全信息或NAS安全信息的更新，则采用更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
本实例中，如图7所示，在移动性过程完成后，UE的用户面锚点保持在源基站5G-gNB即源基站保留对应该UE的PDCP层，RLC层，RRC层功能实体，目标基站LTE eNB只建立对应该UE的MAC层功能实体，该UE在目标基站eNB收发的用户面数据和控制面信令由目标基站eNB透传到用户面锚点所在的源基站5G-gNB进行处理，目标基站eNB只负责进行 MAC层资源调度和MAC PDU组包/解包。
实例2
本实例的场景同实例1，本实例UE从5G基站移动到LTE基站时采用将用户面锚点移动至目标基站的方式执行切换。在移动性过程完成后，UE的用户面锚点转移到目标基站，目标基站根据源基站发送的UE上下文新建该UE在目标基站的上下文、AS连接、核心网连接；源基站在切换完成后删除UE的上下文。
图9为本实例的架构图。如图10所示，本实例的移动性管理流程可以包括：
步骤901，UE测量当前服务基站5G-gNB和邻区的信号质量，当检测到测量结果满足inter-RAT(异系统)切换条件，向5G-gNB上报测量结果。
步骤902，当前服务基站5G-gNB确定要将UE移动到相邻的异系统小区，即LTE制式的eNB。5G-gNB决定采用哪种移动性架构。
如果UE的业务包含大数据，或者UE短时间内不会返回源基站覆盖范围，那么那么源基站5G-gNB选择将用户面锚点转移到目标基站，这样可以减少基站接口的流量开销，以及减少数据端到端传输延时。
步骤903，5G-gNB向切换的目标基站LTE eNB发送改换小区请求消息。
对于本实例来说，由于用户面锚点要移动到目标基站，而且是在inactive态触发的过程，因此可以将这个过程叫做inactive切换，这个消息改称为inactive切换请求，该消息用于说明这个切换是针对inactive状态下的UE，例如可以采用类似LTE的切换请求消息的结构，在所述inactive切换请求消息中包含：UE完整的上下文；
在一实施例中，若UE在源基站正处于数据收发阶段，则在所述inactive切换请求消息中还可包括UE在源基站的PDCP状态和RLC状态，用于保证UE的数据传输在切换到目标基站后的连续性；
此外如果源基站5G-gNB和目标LTE eNB支持多种移动性架构，在一实施例中，在所述inactive切换请求消息中包含源基站5G-gNB对改换小区方式的选择指示，即：是选择将UE的用户面锚点移动到目标基站，还是保留在源基站；
步骤904，目标基站eNB根据收到的移动请求，判断是否接纳所述UE，如果不接纳，则反馈拒绝消息；如果接纳，则为所述UE分配一个eNB范围内的UE ID。
例如，UE ID可以是LTE制式的C-RNTI(Cell-Radio Network Temporary Identifier，小区级无线网临时标识)；或者是resume ID(恢复标识)，所述resume ID用于标识UE在目标基站eNB的身份以及UE在目标基站的上下文存储。
在一实施例中，eNB根据移动请求中包含的UE的上下文内容，建立对应该UE的上下文、用户面连接、控制面连接、与核心网的连接。
步骤905，目标基站eNB接纳了UE，则向源基站5G-gNB反馈inactive切换响应信息，其中包含eNB分配的所述UE ID或者是resume ID；在一实施例中，所述inactive切换响应信息还包含eNB为UE建立的目标基站侧的上下文。在一实施例中，所述inactive切换响应信息还包含目标基站为UE建立的AS安全信息、NAS安全信息。
如果源基站和目标基站共用同一个核心网节点如图11，异系统的源基站和目标基站可能共用同一个EPC(Evolved Packet Core，演进分组核心网)核心网节点，也可能共用同一个5G NGC(Next Generation Core，下一代核心网)核心网节点。若两个异系统的基站共用同一个EPC核心网节点时，5G gNB和EPC核心网节点之间只有UP(User Plane用户面)接口；若两个异系统的基站共用同一个5G NGC核心网节点时，5G gNB和eLTE(Evolved LTE，演进的LTE)eNB与5G NGC核心网节点之间均有CP (Control Plane，控制面)和UP(User Plane用户面)接口)，目标基站无需为所述UE发送NAS安全信息，UE在源基站的NAS安全信息可以在目标基站重用；在一实施例中，目标基站可在所述inactive切换响应消息中增加标识以告知UE在切换完成后保留NAS安全信息并可在目标基站重用。
步骤906，源基站5G-gNB向UE发送inactive切换命令消息，指示UE可以向目标eNB移动，所述inactive切换命令消息包含目标eNB为UE分配的UE ID或者resume ID。
在一实施例中，在所述inactive切换命令消息中包括本次移动性过程所采用的移动性管理架构的标识；即：区分是选择将UE的用户面锚点移动到目标基站，还是保留在源基站。
在一实施例中，在所述inactive切换命令消息中包含要求UE在完成切换流程后删除源基站上下文的指示。
在一实施例中，在所述inactive切换命令消息中将步骤404中目标基站发送给UE的目标基站侧为UE建立的上下文、AS安全信息、NAS安全信息透传给UE。
步骤907，UE根据收到的inactive切换命令消息，获知切换的目标基站，获知本次移动性管理采用的改换小区方式为将用户面锚点转移到目标基站的改换小区方式。
UE若在所述inactive切换命令消息中收到目标基站侧为UE建立的上下文、AS安全信息、NAS安全信息，则存储该上下文、并根据AS安全信息、NAS安全信息完成AS安全、NAS安全的秘钥协商过程；UE发送AS安全完成消息、NAS安全完成消息给源基站。
步骤908，源基站将AS、NAS安全完成消息透传给目标基站。
步骤909，目标基站接收UE通过源基站转发的AS安全完成消息、或NAS安全完成消息，确认AS安全协商完成，转发NAS安全完成消息给核 心网以完成NAS安全的协商过程。
步骤910，源基站5G-gNB删除UE的用户面连接和控制面连接，删除UE的上下文，转移UE状态至IDLE状态。
步骤911，与步骤910对应的，UE删除自己的源基站5G-gNB上下文，转移自己的状态至IDLE态。
实际应用中，如果UE收到目标基站发送的标识，告知UE在切换完成后保留NAS安全信息并可在目标基站重用，则UE保留NAS安全信息不删除。
步骤912，UE向目标基站eNB发起接入，在接入过程中，建立初始信令承载(SRB0，Signaling Radio Bearer 0)，将所述目标基站eNB分配给UE的UE ID或者resume ID上报给目标基站eNB。
步骤913，目标基站eNB根据收到的UE ID或者resume ID确认UE的身份为前述已经接纳的从5G-gNB移动过来的UE，并确认已经建立了所述UE的上下文，目标基站eNB给UE反馈状态转移消息，指示UE将其自身状态置为light connected。
步骤914，UE根据目标基站eNB发送的状态转移消息，将自己在eNB的状态置为light connected。
实例3
本实例场景同实例1，本实例中，UE从5G基站移动到LTE基站的过程中采用将用户面锚点移动至目标基站的方式进行切换，在移动性过程完成后，UE的用户面锚点转移到目标基站，目标基站根据源基站发送的UE上下文新建该UE在目标基站的上下文、AS连接、核心网连接；源基站在切换完成后保存UE的上下文。以便UE以后返回源基站5G-gNB后能更高效率的恢复和5G-gNB的连接。
图12为本实例的架构图，如图13所示本实例的移动性管理流程可以 包括：
步骤1001～1002，同实例2步骤901～902。
步骤1003，同实例2步骤903。
在一实施例中，在改换小区请求消息中包含5G-gNB分配给所述UE的AS context ID(接入层上下文标识)，所述AS context ID用来标识所述UE在5G-gNB的身份以及所述UE在5G-gNB的上下文存储；
步骤1004～1005，同实例2步骤904～905。
步骤1006，同实例2步骤906。
此外，在一实施例中，在所述inactive切换命令消息中包含suspend标示，用于告知UE在完成切换流程后保存5G-gNB的上下文；
步骤1007～1009，同实例2步骤907～909。
步骤1010，源基站5G-gNB删除UE的用户面连接和控制面连接，但保存UE的上下文，转移UE状态至IDLE状态。
步骤1011，与之对应的，UE保存自己的源基站5G-gNB上下文，转移自己在5G-gNB的状态至IDLE态。
步骤1012～1014，同实例2步骤912～914。
步骤1015，若UE后来再次返回所述5G-GNB的覆盖范围，UE可在接入所述5G-gNB的过程中上报所述5G-gNB之前分配给UE的AS context ID，所述5G-gNB可据此查询到保存的所述UE的上下文，所述5G-gNB可根据所述UE的上下文存储恢复UE的AS连接和核心网连接，或者将UE迁移至inactive态。
在以上所有实例中，接入网网元的类型除了LTE eNB，5G gNB之外，也包括small cell，家庭基站，以及兼容EPC架构的其他接入网网元类型。核心网网元的类型除了MME以外，也包括C-SGN,NBIoT MME，5G CN core等支持5G系统、机器类型通讯和移动性管理的核心网网元。
本发明实施例还提供了一种移动性管理装置，包括：处理器和存储器，其中，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行上述移动性管理方法。
此外，本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述的一种移动性管理方法。
此外，本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述的另一种移动性管理方法。
此外，本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述的又一种移动性管理方法。
在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例的方法步骤。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本申请不限制于任何特定形式的硬件和软件的结合。
以上显示和描述了本申请的基本原理和主要特征和本申请的优点。本申请不受上述实施例的限制，上述实施例和说明书中描述的只是说明本申请的原理，在不脱离本申请精神和范围的前提下，本申请还会有各种变化和改进，这些变化和改进都落入要求保护的本申请范围内。
工业实用性
本发明实施例中在inactive态或light-connected态的UE满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式；根据所述确定的改换小区方式执行所述UE的切换；所述UE的改换小区方式至少包括如下之一：保持所述UE的用户面链接在源基站；转移所述UE的用户面链接到目标基站。如此，实现了inactive状态或者light connected状态下在LTE和5G New RAT之间的移动性管理，解决了LTE和5G的RRC新状态下LTE和5G基站之间移动性管理的问题。

Claims (52)

  1. 一种移动性管理方法，包括：
    在不活跃inactive态或轻连接light-connected态的用户设备UE满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式；
    根据所述确定的改换小区方式执行所述UE的切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  2. 根据权利要求1所述的移动性管理方法，其中，所述目标基站满足如下之一：
    所属无线接入技术RAT与源基站为同一类；
    所属RAT与源基站不同类。
  3. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
    向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式。
  4. 根据权利要求1所述的移动性管理方法，其中，
    向所述目标基站发送改换小区请求消息，所述改换小区请求消息还包括：源基站分配给所述UE的接入层上下文标识AS context ID，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
  5. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
    接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；
    向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述目标基站分配给所述UE的UE ID或AS context ID。
  6. 根据权利要求1所述的移动性管理方法，其中，还包括：
    在改换小区方式为保持UE的用户面链接在源基站时，向所述UE发送改换小区命令消息，所述改换小区命令消息还用于指示所述UE停止下述行为至少之一：
    在改换小区过程完成后停止针对源基站的物理信道的周期性监听；
    停止无线接入网RAN区域更新；
    停止对源基站的测量。
  7. 根据权利要求1所述的移动性管理方法，其中，根据所述确定的改换小区方式执行所述UE的切换，包括：
    在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述UE的分组数据汇聚协议PDCP层、无线链路层控制协议RLC层、无线资源控制RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，以便目标基站只完成所述UE所收发的数据和信令的介质访问控制MAC层操作。
  8. 根据权利要求1所述的移动性管理方法，其中，根据所述确定的改换小区方式执行所述UE的切换，包括：
    在改换小区方式为保持UE的用户面链接在源基站时，向所述目标基站发送改换小区请求消息,所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、 RLC、安全相关的上下文部分。
  9. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
    在所述改换小区方式为保持所述UE的用户面链接在源基站时，保持所述UE为inactive状态，并保存所述UE的上下文。
  10. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括如下至少之一：
    在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自目标基站的通知消息，所述通知消息用于告知所述源基站所述UE已在目标基站接入；
    在获知UE已在目标基站接入后，向所述目标基站发送给所述UE的更新的接入层AS安全信息或非接入层NAS安全信息。
  11. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
    在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起指示，所述挂起指示用于指示UE在完成改换小区后保存源基站上下文，向UE发送改换小区命令消息之外，保存所述UE的源基站侧上下文。
  12. 根据权利要求1所述的移动性管理方法，其中，所述根据所述确定的改换小区方式执行所述UE的切换，包括：
    在所述改换小区方式为转移所述UE的用户面链接到目标基站时，向UE发送改换小区命令消息，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
  13. 一种移动性管理装置，包括：
    第一确定模块，配置为在不活跃inactive态或轻连接light-connected态的用户设备UE满足改换小区的条件且确定改换小区的目标基站后，确定所述UE的改换小区方式；
    第一切换模块，配置为根据所述确定的改换小区方式执行所述UE的切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  14. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为向所述目标基站发送改换小区请求消息，所述改换小区请求消息携带所述改换小区方式标识，所述改换小区方式标识用于标识所述确定的改换小区方式。
  15. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为向所述目标基站发送改换小区请求消息，所述改换小区请求消息包括：源基站分配给所述UE的接入层上下文标识AS context ID，所述接入层上下文标识用于标识所述UE在源基站的身份以及所述UE在源基站的上下文存储。
  16. 根据权利要求13所述的移动性管理装置，其中，
    所述述第一切换模块，还配置为接收来自目标基站的改换小区响应消息，所述改换小区响应消息携带下述的一项或多项：目标基站分配给所述UE的UE ID或AS context ID、目标基站侧为UE建立的上下文；
    向所述UE发送改换小区命令消息，所述改换小区命令消息用于指示所述UE向所述目标基站发起改换小区，所述改换小区命令消息至少包含所述目标基站分配给所述UE的UE ID或AS context ID。
  17. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在改换小区方式为保持UE的用户面链接在源基站时，向所述UE发送改换小区命令消息，所述改换小区命令消息还用于指示所述UE停止下述行为至少之一：
    在改换小区过程完成后停止针对源基站的物理信道的周期性监听；
    停止无线接入网RAN区域更新；
    停止对源基站的测量。
  18. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在所述改换小区方式为保持所述UE的用户面链接在源基站时，保留对应所述UE的分组数据汇聚协议PDCP层、无线链路层控制协议RLC层、无线资源控制RRC层功能实体在源基站，且处理由所述目标基站透传至所述源基站的用户面数据和控制面信令，以便目标基站只完成所述UE所收发的数据和信令的介质访问控制MAC层操作。
  19. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在改换小区方式为保持UE的用户面链接在源基站时，向所述目标基站发送改换小区请求消息,所述改换小区请求消息携带所述源基站的UE上下文中与MAC调度、测量、系统消息、物理层相关的部分，不包含与PDCP、RLC、安全相关的上下文部分。
  20. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在所述改换小区方式为保持所述UE的用户面链接在源基站时，保持所述UE为inactive状态，并保存所述UE的上下文。
  21. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自目标基站的通知消息，并向所述目标基站 返回响应消息，所述通知消息用于告知所述源基站所述UE已在目标基站接入，所述响应消息中携带给所述UE的更新的接入层AS安全信息或非接入层NAS安全信息。
  22. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在所述改换小区方式为转移所述UE的用户面链接到目标基站时，接收来自目标基站的改换小区响应消息，向UE发送改换小区命令消息，所述改换小区命令消息包括挂起指示，所述挂起指示用于指示UE在完成改换小区后保存源基站上下文，向UE发送改换小区命令消息后，保存所述UE的源基站侧上下文。
  23. 根据权利要求13所述的移动性管理装置，其中，
    所述第一切换模块，还配置为在所述改换小区方式为转移所述UE的用户面链接到目标基站时，向UE发送改换小区命令消息，所述改换小区命令消息还包含：目标基站侧为UE建立的上下文、AS安全信息、或者NAS安全信息。
  24. 一种移动性管理方法，包括：
    接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
    根据所述改换小区请求消息指示的改换小区方式，执行用户设备UE的切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  25. 根据权利要求24所述的移动性管理方法，其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
    在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的给所述UE的更新的接入层AS安全信息或非接入层NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
  26. 根据权利要求24所述的移动性管理方法，其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
    在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，向所述源基站发送改换小区响应消息，所述改换小区响应消息包含目标基站为UE建立的AS安全信息、以及NAS安全信息保持标识，所述NAS安全信息保持标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站重用。
  27. 根据权利要求24所述的移动性管理方法，其中，所述根据所述改换小区请求消息指示的改换小区方式，执行UE的切换，包括：
    在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
  28. 一种移动性管理装置，包括：
    第二接收模块，配置为接收来自源基站的改换小区请求消息，所述改换小区请求消息至少携带改换小区方式标识，所述改换小区方式标识表示源基站确定的改换小区方式；
    第二切换模块，配置为根据所述改换小区请求消息指示的改换小区方式，执行用户设备UE的切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  29. 根据权利要求28所述的移动性管理装置，其中，
    所述第二切换模块，还配置为在所述改换小区方式为保持所述UE的用户面链接在源基站时，接收来自源基站的响应消息，所述响应消息携带更新的接入层AS安全信息或非接入层NAS安全信息，并将所述更新的AS安全信息或NAS安全信息透传给所述UE。
  30. 根据权利要求28所述的移动性管理装置，其中，
    所述第二切换模块，还配置为在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在所述源基站和目标基站共用同一个核心网节点时，向所述源基站发送改换小区响应消息，所述改换小区响应消息包含目标基站为UE建立的AS安全信息、不包括NAS安全信息以及标识，所述标识用于告知UE在改换小区完成后保留源小区的NAS安全信息以在目标基站重用。
  31. 根据权利要求28所述的移动性管理装置，其中，
    所述第二切换模块，还配置为在所述改换小区方式为转移所述UE的用户面链接到目标基站时，在接收所述源基站透传的UE的AS安全完成消息时，则确认AS安全协商完成；在接收所述源基站透传的UE的NAS安全完成消息时，则转发所述NAS安全完成消息给核心网以完成NAS安全的协商确认。
  32. 一种移动性管理方法，包括：
    接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示用户设备UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
    根据所述改换小区命令消息指示的改换小区方式，执行切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  33. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
    从所述改换小区命令消息中获取目标基站为UE分配的UE ID或接入层上下文标识AS context ID；
    向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
  34. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
    所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己在源基站的状态，保存自己在源基站的上下文；
    其中，所述保持自己在源基站的状态包括：保持自己在源基站的分组数据汇聚协议PDCP实体及PDCP状态、无线链路层控制协议RLC实体及RLC状态、AS安全信息、NAS安全信息，转移自己在源基站的状态至空闲IDLE态；
    所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换过程后转移自己在源基站的状态至IDLE态。
  35. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
    所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
    其中，所述对应项的行为包括如下之一或多项：
    停止针对源基站的物理信道的周期性监听；
    停止无线接入网RAN区域更新；
    停止对源基站的测量。
  36. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
    所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用自己保持的所述源基站的分组数据汇聚协议PDCP实体、无线链路层控制协议RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
  37. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式，执行切换，包括：
    所述改换小区方式为保持所述UE的用户面链接在源基站时，在接入所述目标基站后，若接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
  38. 根据权利要求32所述的移动性管理方法，其中，根据所述改换小区命令消息指示的改换小区方式执行切换，包括：
    所述改换小区方式为转移所述UE的用户面链接到目标基站时：
    若收到的所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；
    若收到的所述改换小区命令消息中携带所述目标基站为所述UE生成的AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；
    若收到的所述改换小区命令消息中携带所述目标基站所连接的核心网生成的NAS安全信息时，根据所述NAS安全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接 的核心网。
  39. 一种移动性管理装置，包括：
    第三接收模块，配置为接收源基站下发的改换小区命令消息，所述改换小区命令消息用于指示用户设备UE向目标基站发起改换小区，所述改换小区命令消息至少携带源基站确定的改换小区方式标识；
    第三切换模块，配置为根据所述改换小区命令消息指示的改换小区方式执行切换；
    所述UE的改换小区方式至少包括如下之一：
    保持所述UE的用户面链接在源基站；
    转移所述UE的用户面链接到目标基站。
  40. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为从所述改换小区命令消息中获取目标基站为UE分配的UE标识ID或接入层上下文标识AS context ID；
    向目标基站发起接入，在接入过程中将所述目标基站分配给UE的UE ID或AS context ID上报给目标基站。
  41. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为保持所述UE的用户面链接在源基站时，保持自己在源基站的状态，保存自己在源基站的上下文；
    其中，所述保持自己在源基站的状态包括：保持自己在源基站的PDCP实体及分组数据汇聚协议PDCP状态、无线链路层控制协议RLC实体及RLC状态、接入层AS安全信息、非接入层NAS安全信息，转移自己在源基站的状态至空闲IDLE态。
  42. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为保持所述UE的用户面链接在源基站时，根据所述改换小区命令消息，停止对应项的行为；
    其中，所述对应项的行为包括如下之一或多项：
    停止针对源基站的物理信道的周期性监听；停止无线接入网RAN区域更新；
    停止对源基站的测量。
  43. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为保持所述UE的用户面链接在源基站时，完成在所述目标基站的接入后，收发数据或信令时使用UE自身保持的所述源基站的PDCP实体、RLC实体、AS安全信息、NAS安全信息来处理PDCP层、RLC层操作、AS加密解密、NAS加密解密、完整性保护。
  44. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为保持所述UE的用户面链接在源基站时，在接收到所述目标基站透传的来自所述源基站的AS安全信息或NAS安全信息的更新后，采用所述更新的AS安全信息或NAS安全信息完成数据或信令的AS加密解密、NAS加密解密、完整性保护。
  45. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为转移所述UE的用户面链接到目标基站时：
    在所述改换小区命令消息中携带目标基站为所述UE建立的目标基站侧的上下文时，从所述改换小区命令消息中获取所述目标基站侧的上下文并存储；
    在所述改换小区命令消息中携带AS安全信息时，根据所述AS安全信息完成AS安全秘钥协商，并在秘钥协商成功时通过源基站将AS安全完成消息送至目标基站；
    在所述改换小区命令消息中携带NAS安全信息时，根据所述NAS安 全信息完成NAS安全秘钥协商，并在秘钥协商成功时通过源基站透传NAS安全完成消息至目标基站所连接的核心网。
  46. 根据权利要求39所述的移动性管理装置，其中，
    所述第三切换模块，配置为所述改换小区方式为转移所述UE的用户面链接到目标基站时，在完成切换后转移UE在源基站的状态至IDLE态。
  47. 一种移动性管理装置，包括：处理器和存储器，其中，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现权利要求1至12中任一项所述的移动性管理方法。
  48. 一种移动性管理装置，包括：处理器和存储器，其中，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现权利要求24至27中任一项所述的移动性管理方法。
  49. 一种移动性管理装置，包括：处理器和存储器，其中，所述存储器存储有计算机可执行指令，所述计算机可执行指令被所述处理器执行时实现权利要求32至38中任一项所述的移动性管理方法。
  50. 一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1至12中任一项所述的移动性管理方法。
  51. 一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求24至27中任一项所述的移动性管理方法。
  52. 一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求32至38中任一项所述的移动性管理方法。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12052626B2 (en) 2021-12-23 2024-07-30 T-Mobile Usa, Inc. Steering non-mobile connected-mode user equipment to higher capacity radio cells

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020088260A1 (en) * 2018-11-02 2020-05-07 Mediatek Inc. Enhanced handover methods and apparatuses using the same
CN111491338B (zh) * 2019-01-28 2022-04-22 华为技术有限公司 上下文存储方法及装置
EP3915334A1 (en) * 2019-02-14 2021-12-01 Google LLC Resuming radio connections in a communication network
CN114727290A (zh) 2019-04-28 2022-07-08 华为技术有限公司 通信方法及其装置
CN110505709B (zh) * 2019-09-10 2021-11-05 深圳市万普拉斯科技有限公司 移动网络快速去激活方法、装置及移动终端
WO2022160315A1 (zh) * 2021-01-30 2022-08-04 华为技术有限公司 通信方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016077229A1 (en) * 2014-11-10 2016-05-19 Qualcomm Incorporated Enhanced connection management for multiple access networks
WO2016089349A1 (en) * 2014-12-01 2016-06-09 Nokia Solutions And Networks Oy Inactive communication mode
CN105898894A (zh) * 2016-05-13 2016-08-24 华为技术有限公司 Rrc状态的控制方法和装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103582044B (zh) * 2012-08-10 2018-04-10 华为技术有限公司 一种切换控制方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016077229A1 (en) * 2014-11-10 2016-05-19 Qualcomm Incorporated Enhanced connection management for multiple access networks
WO2016089349A1 (en) * 2014-12-01 2016-06-09 Nokia Solutions And Networks Oy Inactive communication mode
CN105898894A (zh) * 2016-05-13 2016-08-24 华为技术有限公司 Rrc状态的控制方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE: "Mobility scenarios for ''inactive state*", 3GPP TSG RAN WG3 MEETING #93BIS, R3-162336, 30 September 2016 (2016-09-30), XP051163007 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12052626B2 (en) 2021-12-23 2024-07-30 T-Mobile Usa, Inc. Steering non-mobile connected-mode user equipment to higher capacity radio cells

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