WO2019140560A1 - 一种切换方法及装置、计算机存储介质 - Google Patents

一种切换方法及装置、计算机存储介质 Download PDF

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Publication number
WO2019140560A1
WO2019140560A1 PCT/CN2018/072900 CN2018072900W WO2019140560A1 WO 2019140560 A1 WO2019140560 A1 WO 2019140560A1 CN 2018072900 W CN2018072900 W CN 2018072900W WO 2019140560 A1 WO2019140560 A1 WO 2019140560A1
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WIPO (PCT)
Prior art keywords
access network
network element
terminal
core network
core
Prior art date
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PCT/CN2018/072900
Other languages
English (en)
French (fr)
Inventor
刘建华
杨宁
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to AU2018403581A priority Critical patent/AU2018403581A1/en
Priority to EP18900988.9A priority patent/EP3742796B1/en
Priority to CN201880085934.6A priority patent/CN111567084A/zh
Priority to JP2020539033A priority patent/JP2021516476A/ja
Priority to PCT/CN2018/072900 priority patent/WO2019140560A1/zh
Priority to KR1020207022839A priority patent/KR20200109331A/ko
Publication of WO2019140560A1 publication Critical patent/WO2019140560A1/zh
Priority to US16/929,377 priority patent/US11240722B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • 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
    • H04W36/0019—Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a handover method and apparatus, and a computer storage medium.
  • a RAN Radio Access Network
  • gNB 5G base station
  • eNB 4G base station
  • 5G Core Network 5G Core Network scenario, as shown in Figure 1.
  • 5G base station such as the 5G RAN in FIG.
  • HO Require Handover Require
  • Handover Require a handover request
  • AMF Core Access and Mobility Management Function
  • the AMF cannot currently determine that the radio access is performed (RAT, Radio access technology) (ie, 5G CN is unchanged, the base station changes from gNB to eNB) or system switching (ie, the core network changes from 5G CN to EPC).
  • RAT Radio access technology
  • an embodiment of the present invention provides a handover method and apparatus, and a computer storage medium.
  • the first access network element receives the data of the terminal forwarded by the network element of the second access network, and sends the data to the first core network element.
  • the first access network element determines, according to the first information, that when the terminal is handed over from the first access network to the second access network, the first access network and the first core network are maintained.
  • the connection is unchanged, including:
  • the first access network element determines, according to the received first message, that the terminal is switched from the first access network to the second access network, and maintains the first access network and the first The connection to the core network is unchanged, including:
  • the first access network element sends a first handover request message, so that the first core network element or the second core network element determines that the terminal is switched by the first access network according to the service type of the terminal.
  • the connection between the first access network and the first core network is kept unchanged;
  • the first access network element is determined based on a handover feedback message from the first core network element or the second core network element, and determines that the terminal is switched from the first access network to the second access network.
  • the connection between the first access network and the first core network is unchanged.
  • the first core network element or the second core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network, and the first The connection between the access network and the first core network is unchanged, including:
  • the first core network element or the second core network element determines that the second core network element does not support the service type of the terminal, determining that the terminal is switched from the first access network to the second access network The connection between the first access network and the first core network is kept unchanged.
  • the first core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the first access network element sends the first handover request message, including:
  • the first access network network element sends a first handover request message to the first core network element.
  • the second core network element determines that the terminal is switched from the first access network to the second access network according to the service type of the terminal, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the first access network element sends the first handover request message, including:
  • the first access network element sends a first handover request message to the second core network element or sends a first handover request message to the second core network element via the first core network element.
  • the first access network element determines, according to the received first message, that the terminal is switched from the first access network to the second access network, and maintains the first access network and the first The connection to the core network is unchanged, including:
  • the first access network element sends a second handover request message, where the second handover request message carries indication information, where the indication information is used to indicate that the terminal is handed over by the first access network to the second access network. Keeping the connection between the first access network and the first core network unchanged, so that the second core network element confirms the second handover request message and feeds back a handover request acknowledgement message;
  • the first access network element determines that the connection between the first access network and the first core network is not maintained when the terminal is handed over to the second access network by the first access network. change.
  • the first access network element sends a second handover request message, including:
  • the first access network element sends a second handover request message to the second core network element or sends a second handover request message to the second core network element via the second access network element.
  • the handover request acknowledgement message carries the resource allocated by the second access network network element to the terminal.
  • the method further includes:
  • the first access network sends a handover command to the terminal, where the terminal completes the handover of the first access network to the second access network, and sends a handover complete message to the second access network;
  • the first access network network element receives a handover confirmation message sent by the second access network network element.
  • a determining unit configured to determine, according to the first information or the received first message, that the connection between the first access network and the first core network is unchanged when the terminal is switched from the first access network to the second access network ;
  • a transmitting unit configured to receive data of the terminal forwarded by the second access network element, and send the data to the first core network element.
  • the determining unit includes:
  • a first determining subunit configured to determine, according to the capability information of the terminal and/or the capability information of the second access network network element, when the terminal is switched from the first access network to the second access network, The connection between the first access network and the first core network is unchanged.
  • the determining unit includes:
  • a second determining subunit configured to send the first handover request message, so that the first core network element or the second core network element determines that the terminal is switched from the first access network to the first according to the service type of the terminal
  • the connection between the first access network and the first core network is kept unchanged; and the terminal is determined by the handover feedback message from the first core network element or the second core network element.
  • the connection between the first access network and the first core network is kept unchanged.
  • the first core network element or the second core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network, and the first The connection between the access network and the first core network is unchanged, including:
  • the first core network element or the second core network element determines that the second core network element does not support the service type of the terminal, determining that the terminal is switched from the first access network to the second access network The connection between the first access network and the first core network is kept unchanged.
  • the first core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the second determining subunit is configured to send a first handover request message to the first core network element.
  • the second core network element determines that the terminal is switched from the first access network to the second access network according to the service type of the terminal, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the second determining subunit is configured to send a first handover request message to the second core network element or send a first handover request message to the second core network element by using the first core network element .
  • the determining unit includes:
  • a third determining subunit configured to send a second handover request message, where the second handover request message carries indication information, where the indication information is used to indicate that the terminal is switched from the first access network to the second access network Maintaining the connection between the first access network and the first core network, so that the second core network element confirms the second handover request message and feeds back a handover request acknowledgement message; and confirms based on the handover request
  • the message is: when the terminal is switched from the first access network to the second access network, the connection between the first access network and the first core network is kept unchanged.
  • the third determining subunit is configured to send a second handover request message to the second core network element or send the second access network element to the second core network element The second handover request message.
  • the handover request acknowledgement message carries the resource allocated by the second access network network element to the terminal.
  • the device further includes:
  • a handover control unit configured to send a handover command to the terminal, where the terminal completes handover of the first access network to the second access network, and sends a handover complete message to the second access network;
  • a handover confirmation unit configured to receive a handover confirmation message sent by the second access network network element.
  • the computer storage medium provided by the embodiment of the present invention has stored thereon computer executable instructions, and the computer executable instructions are implemented by the processor to implement the foregoing switching method.
  • the first access network element determines, according to the first information or the received first message, that the terminal is switched from the first access network to the second access network, and the first connection is maintained.
  • the first access network element receives the data of the terminal forwarded by the second access network element, and sends the data to the first core network.
  • Network element The technical solution of the embodiment of the present invention avoids the handover of the network element across the core network, and the service of the terminal may access the network element of the network through the source access network element (that is, the second access network element) of the target access network. That is, the forwarding of the first access network element is sent to the source core network element (that is, the first core network element), and the switching process between the core network elements is not required to be performed, thereby reducing service delay and improving The user experience.
  • 1 is a connection architecture diagram of an access network and a core network in NG;
  • FIG. 2 is a schematic flowchart of a system switch in a connected state scenario, that is, a core network is changed from a 5G CN to an EPC;
  • FIG. 3 is a schematic flowchart of System switching in an idle state scenario, that is, a core network is changed from a 5G CN to an EPC;
  • FIG. 4 is a schematic diagram of a handover process of an N26 interface between an EPC and a 5G CN;
  • FIG. 5 is a schematic flowchart 1 of a handover method according to an embodiment of the present invention.
  • FIG. 6 is a second schematic flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a switching apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
  • the following describes the handover procedure in conjunction with the presence of an N26 interface between the EPC and the 5G CN.
  • Figure 2 is a schematic diagram of the process of the system switching in the connected mode (that is, the core network changes from 5G CN to EPC)
  • Figure 3 is a schematic diagram of the system switching in the idle mode (that is, the core network changes from 5G CN to EPC).
  • the definitions of the network elements involved in Figures 2 and 3 are as follows:
  • UE terminal, User Equipment
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Evolved Universal Terrestrial Radio Access Network Evolved Universal Terrestrial Radio Access Network
  • 5G-RAN 5G core network, 5G Radio Access Network;
  • AMF Receive Core Access and Mobility Management, Core Access and Mobility Management Function
  • MME Mobility Management Entity
  • SGW Service Gateway, Serving GateWay;
  • PGW-C Packet Data Gateway - Control Plane, Packet Data Network GateWay-Control plane;
  • SMF session management function, Session Management Function
  • PGW-U Packet Data Gateway - User Plane, Packet Data Network GateWay-User plane;
  • UPF User plane function, User Plane Function
  • the timing of triggering the handover is determined by the 5G-RAN according to the measurement threshold.
  • the handover request command is sent to the AMF of the 5G core network (ie, step 1), the 5G core network side prepares resources with the 4G core network side, and then the 5G-RAN sends the handover to the terminal.
  • Command ie, step 11b to switch the UE to the 4G network.
  • the UE sends a tracking area update request (TAU Request) to the MME of the 4G core network, and the MME is responsible for obtaining relevant context information to the 5G core network, and completing the 4G core network.
  • TAU Request tracking area update request
  • FIG. 4 is a schematic diagram of a switching process of an N26 interface between an EPC and a 5G CN.
  • the behavior of the UE is specified as two types:
  • the UE performs an attach with handover flag (Attach with Handover flag) and carries the corresponding PDU session in the 5G system.
  • An access point (APN)/data network (DNN) (such as step 5 in FIG. 4)
  • the attach request message will trigger the network side to find the corresponding AP according to the APN/DNN used by the UE.
  • the tracking area update request (TAU Request) is directly performed (step 1 and step 2 in FIG. 4).
  • the network side will send a Tracking Area Update Reject (TAU Reject) message to the UE, and then the UE will initiate a normal attach procedure. In this case, the IP address consistency of the session cannot be guaranteed.
  • the embodiment of the present invention provides a handover method.
  • the terminal moves from the coverage of the first core network element to the coverage of the second core network element, the original first core network element and the first access network are maintained.
  • the connection between the network element and the data between the terminal and the core network are forwarded by the first access network element.
  • the first access network element refers to the source access network element accessed by the terminal
  • the second access network element refers to the destination access network element accessed by the terminal.
  • the first core network element refers to the core network element connected to the first access network element
  • the second core network element refers to the core network element connected to the second access network element.
  • the first core network element may be an EPC
  • the second core network element may be a 5G CN.
  • the first core network element may also be a 5G CN
  • the second core network element is an EPC.
  • the first access network element as the source access network element may be an eNB, and the second access network element may be a gNB.
  • the first access network element may also be a gNB, and the second access network element may be an eNB.
  • FIG. 5 is a schematic flowchart 1 of a handover method according to an embodiment of the present invention. As shown in FIG. 5, the handover method includes the following steps:
  • Step 501 The first access network element determines, according to the first information or the received first message, that the terminal is switched from the first access network to the second access network, and the first access network and the first core are maintained. The connection to the network is unchanged.
  • the first access network element receives the measurement report sent by the terminal, and determines that the core network handover needs to be performed based on the measurement report.
  • the switching of the core network is not required in some scenarios, that is, when the terminal is switched from the first access network to the second access network, the first is maintained.
  • Manner 1 The first access network element determines, according to the capability information of the terminal and/or the capability information of the network element of the second access network, that the terminal is handed over from the first access network to the second access network. The connection between the first access network and the first core network is kept unchanged.
  • the first access network element sends a first handover request message, so that the first core network element determines that the terminal is switched from the first access network to the second access according to the service type of the terminal. Keeping the connection between the first access network and the first core network unchanged; the first access network element is determined to be the first by the first feedback network element based on the handover feedback message from the first core network element When the access network switches to the second access network, the connection between the first access network and the first core network is kept unchanged.
  • the first access network network element sends a first handover request message to the first core network element.
  • the first core network element determines that the second core network element does not support the service type of the terminal, determining that the terminal is switched from the first access network to the second access network Keeping the connection between the first access network and the first core network unchanged.
  • Manner 3 The first access network element sends a first handover request message, so that the second core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network. Maintaining the connection between the first access network and the first core network unchanged; the first access network element is determined to be the first access by the first feedback network element based on the handover feedback message from the second core network element When the network switches to the second access network, the connection between the first access network and the first core network is kept unchanged.
  • the first access network element sends a first handover request message to the second core network element or sends the first core network element to the second core network element.
  • the first handover request message sends a first handover request message to the second core network element or sends the first core network element to the second core network element.
  • the second core network element determines that the second core network element does not support the service type of the terminal, determining that the terminal is switched from the first access network to the second access network Keeping the connection between the first access network and the first core network unchanged.
  • the first access network element sends a second handover request message, where the second handover request message carries indication information, where the indication information is used to indicate that the terminal is switched from the first access network to the second
  • the connection between the first access network and the first core network is kept unchanged, so that the second core network element confirms the second handover request message and feeds back a handover request acknowledgement message
  • the first access network element based on the handover request acknowledgement message, determines that the connection between the first access network and the first core network is unchanged when the terminal is handed over to the second access network by the first access network.
  • the first access network element sends a second handover request message to the second core network element or sends the second access network element to the second core network element. Second switch request message.
  • the handover request acknowledgement message carries the resource allocated by the second access network network element to the terminal.
  • the first access network sends a handover command to the terminal, where the terminal completes the handover of the first access network to the second access network, and sends a handover complete message to the second access network;
  • the first access network network element receives a handover confirmation message sent by the second access network network element.
  • the terminal establishes a connection with the network element of the second access network, and performs the following step 502.
  • Step 502 The first access network element receives the data of the terminal forwarded by the network element of the second access network, and sends the data to the first core network element.
  • FIG. 6 is a schematic flowchart 2 of a handover method according to an embodiment of the present invention. As shown in FIG. 6 , the handover method includes the following steps:
  • Step 1 The UE performs measurement on the neighboring cell, and reports the measurement report (MR) to the S-eNB when the measurement report reporting condition preset by the network is met.
  • MR measurement report
  • the S-eNB is a source access network element of the UE.
  • the S-eNB After receiving the MR sent by the UE, the S-eNB determines that the system switching needs to be performed according to the MR.
  • Step 2a The S-eNB determines, according to the capability information of the terminal or the capability information of the T-gNB, that the core network of the terminal is not replaced. or,
  • Step 2b The S-eNB sends a handover request message to the EPC, where the T-gNB identifies the information.
  • the EPC determines, according to the service type established by the terminal, for example, a low-latency service, or a voice service, or any service that cannot be supported by the 5G CN, the EPC decides not to replace the core network of the terminal. And feedback to the S-eNB. or,
  • Step 2b+2c The S-eNB sends a handover request message to the EPC; the EPC sends a handover request to the 5G CN. After receiving the EPC switching request message, the 5G CN decides not to replace the core network of the terminal according to the service type, for example, a low-latency service, or a voice service, or any service that cannot be supported by the 5G CN. Give EPC and S-eNB. or,
  • Step 3+4+5 The S-eNB sends a handover (HO) request message to the T-gNB, which carries the indication information of the core network that does not replace the terminal; the T-gNB notifies the 5G CN that the core network of the terminal is not replaced, and the 5G CN confirms The core network of the terminal is not replaced; the T-gNB sends a HO request acknowledgement message to the S-eNB, where the T-gNB carries the resource information allocated by the UE.
  • HO handover
  • step 2a, step 2b, step 2b+2c, and step 3+4+5 can all determine the core network without replacing the terminal.
  • Step 6 The S-eNB sends an HO command to the UE.
  • Step 7 The UE sends an HO Complete message to the T-gNB.
  • Step 8 The T-gNB sends an HO acknowledgement message to the S-eNB.
  • FIG. 7 is a schematic structural diagram of a switching apparatus according to an embodiment of the present invention. As shown in FIG. 7, the switching apparatus includes:
  • the determining unit 701 is configured to: when the terminal is switched from the first access network to the second access network according to the first information or the received first message, keep the connection between the first access network and the first core network change;
  • the transmitting unit 702 is configured to receive data of the terminal forwarded by the second access network network element, and send the data to the first core network element.
  • the determining unit 701 includes:
  • the first determining subunit 7011 is configured to determine, according to the capability information of the terminal and/or the capability information of the second access network network element, that the terminal is maintained when the terminal is switched from the first access network to the second access network. The connection between the first access network and the first core network is unchanged.
  • the determining unit 701 includes:
  • a second determining subunit 7012 configured to send a first handover request message, so that the first core network element or the second core network element determines that the terminal is switched by the first access network according to the service type of the terminal
  • the second access network keeps the connection between the first access network and the first core network unchanged; and based on the handover feedback message from the first core network element or the second core network element, determines that the terminal is configured by When the first access network switches to the second access network, the connection between the first access network and the first core network is kept unchanged.
  • the first core network element or the second core network element determines, according to the service type of the terminal, that the terminal is switched from the first access network to the second access network, and the first The connection between the access network and the first core network is unchanged, including:
  • the first core network element or the second core network element determines that the second core network element does not support the service type of the terminal, determining that the terminal is switched from the first access network to the second access network The connection between the first access network and the first core network is kept unchanged.
  • the first core network element determines, according to the service type of the terminal, that the terminal is handed over from the first access network to the second access network, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the second determining subunit 7012 is configured to send a first handover request message to the first core network element.
  • the second core network element determines, according to the service type of the terminal, that the terminal is handed over from the first access network to the second access network, maintaining the first access network and the first The connection of the core network is unchanged, then:
  • the second determining subunit 7012 is configured to send a first handover request message to the second core network element or send a first handover request to the second core network element by using the first core network element Message.
  • the determining unit 701 includes:
  • the third determining subunit 7013 is configured to send a second handover request message, where the second handover request message carries indication information, where the indication information is used to indicate that the terminal is handed over by the first access network to the second access network. Maintaining the connection between the first access network and the first core network unchanged, so that the second core network element confirms the second handover request message and feeds back a handover request acknowledgement message; based on the handover request And confirming the message, determining that the connection between the first access network and the first core network is unchanged when the terminal is switched from the first access network to the second access network.
  • the third determining subunit 7013 is configured to send a second handover request message to the second core network element or to the second core network element via the second access network element. Send a second handover request message.
  • the handover request acknowledgement message carries the resource allocated by the second access network network element to the terminal.
  • the device further includes:
  • the switching control unit 703 is configured to send a handover command to the terminal, where the terminal completes the handover of the first access network to the second access network, and sends a handover complete message to the second access network;
  • the handover confirmation unit 704 is configured to receive a handover confirmation message sent by the second access network network element.
  • the implementation functions of the units in the switching apparatus shown in FIG. 7 can be understood by referring to the related description of the foregoing switching method.
  • the functions of the units in the switching device shown in FIG. 7 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • the above switching device can also be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer-executable instructions are stored, and the computer-executable instructions are executed by the processor to implement the foregoing switching method of the embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
  • the computer device may be a terminal or a network device.
  • computer device 100 may include one or more (only one shown) processor 1002 (processor 1002 may include, but is not limited to, a Micro Controller Unit (MCU) or a programmable logic device. (processing device such as Field Programmable Gate Array), memory 1004 for storing data,
  • processor 1002 may include, but is not limited to, a Micro Controller Unit (MCU) or a programmable logic device. (processing device such as Field Programmable Gate Array), memory 1004 for storing data,
  • MCU Micro Controller Unit
  • memory 1004 for storing data
  • FIG. 8 is merely illustrative and does not limit the structure of the above electronic device.
  • computer device 100 may also include more or fewer components than shown in FIG. 8, or have a different configuration than that shown in FIG.
  • the memory 1004 can be used to store software programs and modules of application software, such as program instructions/modules corresponding to the method in the embodiment of the present invention, and the processor 1002 executes various functional applications by running software programs and modules stored in the memory 1004. And data processing, that is, to achieve the above method.
  • Memory 1004 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory.
  • memory 1004 can further include memory remotely located relative to processor 1002, which can be connected to computer device 100 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • Transmission device 1006 is for receiving or transmitting data via a network.
  • the network specific examples described above may include a wireless network provided by a communication provider of computer device 100.
  • the transmission device 1006 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet.
  • the transmission device 1006 can be a radio frequency (RF) module for communicating with the Internet wirelessly.
  • NIC Network Interface Controller
  • RF radio frequency
  • the disclosed method and smart device may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

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Abstract

本发明公开了一种切换方法及装置、计算机存储介质，所述方法包括：第一接入网网元根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；所述第一接入网网元接收第二接入网网元转发的所述终端的数据，并将所述数据发送给所述第一核心网网元。

Description

一种切换方法及装置、计算机存储介质 技术领域
本发明涉及无线通信技术领域，尤其涉及一种切换方法及装置、计算机存储介质。
背景技术
在下一代移动通信(NG，Next Generation)系统中，接入网(RAN，Radio Access Network)可以包括5G基站(gNB)和4G基站(eNB)同时接入或分别接入5G核心网(5G CN，5G Core Network)的场景，如图1所示。对于5G基站(如图1中的5G RAN)而言，如果向接收核心接入和移动性管(AMF，Core Access and Mobility Management Function)实体发送的切换请求(HO Require，Handover Require)消息中的目的地址(Target id)是4G基站地址(eNB id)且该4G基站既接入5G CN又接入4G核心网(EPC，Evolved Packet Core)时，AMF目前无法判断是进行无线接入(RAT，radio access technology)切换(即5G CN不变，基站从gNB变成eNB)还是进行系统(System)切换(即核心网从5G CN变成EPC)。
此外，如果需要进行System切换，势必需要执行从5G CN切换到EPC的切换流程，同理，如果从EPC切换到5G CN，也需要执行相应的切换流程。而核心网切换的流程用时较长，会给业务带来中断或较长时延等弊端。
发明内容
为解决上述技术问题，本发明实施例提供了一种切换方法及装置、计算机存储介质。
本发明实施例提供的切换方法，包括：
第一接入网网元根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
所述第一接入网网元接收第二接入网网元转发的所述终端的数据，并将所述数据发送给第一核心网网元。
本发明实施例中，所述第一接入网网元根据第一信息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
所述第一接入网网元根据所述终端的能力信息和/或所述第二接入网网 元的能力信息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述第一接入网网元根据接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
所述第一接入网网元发送第一切换请求消息，以使所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
所述第一接入网网元基于来自所述第一核心网网元或者第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
如果所述第一核心网网元或者第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，如果所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
所述第一接入网网元发送第一切换请求消息，包括：
所述第一接入网网元向所述第一核心网网元发送第一切换请求消息。
本发明实施例中，如果所述第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
所述第一接入网网元发送第一切换请求消息，包括：
所述第一接入网网元向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
本发明实施例中，所述第一接入网网元根据接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
所述第一接入网网元发送第二切换请求消息，其中，所述第二切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；
所述第一接入网网元基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述第一接入网网元发送第二切换请求消息，包括：
所述第一接入网网元向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第二切换请求消息。
本发明实施例中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
本发明实施例中，所述方法还包括：
所述第一接入网网向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
所述第一接入网网元接收所述第二接入网网元发送的切换确认消息。
本发明实施例提供的切换装置，包括：
确定单元，用于根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
传输单元，用于接收第二接入网网元转发的所述终端的数据，并将所述数据发送给第一核心网网元。
本发明实施例中，所述确定单元，包括：
第一确定子单元，用于根据所述终端的能力信息和/或所述第二接入网网元的能力信息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述确定单元，包括：
第二确定子单元，用于发送第一切换请求消息，以使所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；基于来自所述第一核心网网元或者第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
如果所述第一核心网网元或者第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，如果所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
所述第二确定子单元，用于向所述第一核心网网元发送第一切换请求消息。
本发明实施例中，如果所述第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一 核心网的连接不变，则：
所述第二确定子单元，用于向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
本发明实施例中，所述确定单元，包括：
第三确定子单元，用于发送第二切换请求消息，其中，所述第二切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
本发明实施例中，所述第三确定子单元，用于向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第二切换请求消息。
本发明实施例中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
本发明实施例中，所述装置还包括：
切换控制单元，用于向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
切换确认单元，用于接收所述第二接入网网元发送的切换确认消息。
本发明实施例提供的计算机存储介质，其上存储有计算机可执行指令，该计算机可执行指令被处理器执行时实现上述的切换方法。
本发明实施例的技术方案中，第一接入网网元根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；所述第一接入网网元接收第二接入网网元转发的所述终端的数据，并将所述数据发送给所述第一核心网网元。采用本发明实施例的技术方案，避免了跨核心网网元的切换，终端的业务可以在目标接入网网元侧(也即第二接入网网元)通过源接入网网元(也即第一接入网网元)的转发，发送给源核心网网元(也即第一核心网网元)，无需执行核心网网元之间的切换流程，降低了业务时延，提升了用户体验。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为NG中的接入网与核心网的连接架构图；
图2为连接态场景下的System切换(即核心网从5G CN变成EPC)的 流程示意图；
图3为空闲态场景下的System切换(即核心网从5G CN变成EPC)的流程示意图；
图4为EPC和5G CN之间无N26接口的切换流程示意图；
图5为本发明实施例的切换方法的流程示意图一；
图6为本发明实施例的切换方法的流程示意图二；
图7为本发明实施例的切换装置的结构组成示意图；
图8为本发明实施例的计算机设备的结构组成示意图。
具体实施方式
为便于理解本发明实施例的技术方案，以下对本发明实施例涉及到的相关技术进行说明。
以下结合EPC和5G CN之间是否存在N26接口对切换流程进行描述。
1)EPC和5G CN之间有N26接口
图2为连接态场景下的System切换(即核心网从5G CN变成EPC)的流程示意图，图3为空闲态场景下的System切换(即核心网从5G CN变成EPC)的流程示意图，图2和图3中涉及到的各网元的释义如下：
UE：终端，User Equipment；
E-UTRAN：演进通用陆地无线接入网络，Evolved Universal Terrestrial Radio Access Network；
5G-RAN：5G核心网，5G Radio Access Network；
AMF：接收核心接入和移动性管，Core Access and Mobility Management Function；
MME：移动管理功能，Mobility Management Entity；
SGW：服务网关，Serving GateWay；
PGW-C：分组数据网关-控制面，Packet Data Network GateWay-Control plane；
SMF：会话管理功能，Session Management Function；
PGW-U：分组数据网关-用户面，Packet Data Network GateWay-User plane；
UPF：用户平面功能，User Plane Function；
如图2所示，若UE处于连接状态，则由5G-RAN根据测量门限值决定触发切换的时机。当5G-RAN决定触发切换时，将向5G核心网的AMF发送切换请求命令(即步骤1)，5G核心网侧会与4G核心网侧进行资源的准备，然后由5G-RAN向终端发送切换命令(即步骤11b)，从而将UE切换到4G网络上。
如图3所示，若UE处于空闲状态，则UE向4G核心网的MME发送跟踪区更新请求(TAU Request)，由MME负责向5G核心网获得相关的上 下文信息，并完成在4G核心网的位置更新流程。
2)EPC和5G CN之间无N26接口
图4为EPC和5G CN之间无N26接口的切换流程示意图。
目前在5G CN和EPC跨系统切换的情况下，若EPC和5G CN之间没有N26接口，则UE的行为被规定为两种：
1)图4所示，若UE可以识别网络侧发来的“支持无N26切换”的指示，则UE执行携带切换标识的附着过程(Attach with Handover flag)，并携带5G系统中PDU会话对应的接入点(APN，Access Point Name)/数据网络(DNN，Data Network Name)(如图4中的步骤5)，该附着请求消息将触发网络侧根据UE所用的APN/DNN来查找所在的合设网元SMF+PGW-C、UPF+PGW-U、PCF+PCRF，从而让合设网元映射出4G的SM上下文，实现会话IP地址的一致性。
2)如图4所示，若UE不识别网络侧发来的“支持无N26切换”的指示，则直接做跟踪区更新请求(TAU Request)(如图4中的步骤1和步骤2)，此时，如果网络侧不支持N26接口，则会导致网络侧向UE发送跟踪区更新拒绝(TAU Reject)消息，然后UE将发起普通的附着流程。该情况下，会话的IP地址一致性无法保障。
本发明实施例提出一种切换方法，当终端由第一核心网网元的覆盖范围移动到第二核心网网元的覆盖范围时，保持原来的第一核心网网元与第一接入网网元的连接，终端和核心网之间的数据由第一接入网网元进行转发。
本发明实施例的以下技术方案中，第一接入网网元是指终端接入的源接入网网元，第二接入网网元是指终端接入的目的接入网网元。第一核心网网元是指与第一接入网网元连接的核心网网元，第二核心网网元是指与第二接入网网元连接的核心网网元。
在一实施方式中，第一核心网网元可以是EPC，第二核心网网元可以是5G CN。当然，第一核心网网元也可以是5G CN，第二核心网网元是EPC。
在一实施方式中，作为源接入网网元的第一接入网网元可以是eNB，第二接入网网元可以是gNB。当然，第一接入网网元也可以是gNB，第二接入网网元可以是eNB。
图5为本发明实施例的切换方法的流程示意图一，如图5所示，所述切换方法包括以下步骤：
步骤501：第一接入网网元根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在步骤501之前，所述第一接入网网元接收终端发送的测量报告，基于所述测量报告确定需要进行核心网切换。
本发明实施例中，为了保障业务的时延需求，在某些场景下不需要进 行核心网的切换，即：终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。确定不需要进行核心网的切换可以通过以下方式实现：
方式一：所述第一接入网网元根据所述终端的能力信息和/或所述第二接入网网元的能力信息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
方式二：所述第一接入网网元发送第一切换请求消息，以使所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；所述第一接入网网元基于来自所述第一核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述第一接入网网元向所述第一核心网网元发送第一切换请求消息。
在一实施方式中，如果所述第一核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
方式三：所述第一接入网网元发送第一切换请求消息，以使第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；所述第一接入网网元基于来自所述第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述第一接入网网元向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
在一实施方式中，如果所述第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
方式四：所述第一接入网网元发送第二切换请求消息，其中，所述第二切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；所述第一接入网网元基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述第一接入网网元向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第 二切换请求消息。
在一实施方式中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
本发明实施例还包括如下步骤：
所述第一接入网网向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
所述第一接入网网元接收所述第二接入网网元发送的切换确认消息。
而后，终端便建立了与第二接入网网元的连接，并执行如下步骤502。
步骤502：所述第一接入网网元接收所述第二接入网网元转发的所述终端的数据，并将所述数据发送给所述第一核心网网元。
以下结合具体应用示例对本发明实施例的技术方案再做进一步描述。
图6为本发明实施例的切换方法的流程示意图二，如图6所示，所述切换方法包括以下步骤：
步骤1：UE对邻小区进行测量，当满足网络预设的测量报告上报条件时，向S-eNB上报测量报告(MR)。
这里，S-eNB为UE的源接入网网元。
S-eNB接收到UE发送的MR后，根据MR判断出需要进行System切换。
步骤2a：S-eNB根据终端的能力信息或者T-gNB的能力信息判断不更换终端的核心网。或者，
步骤2b：S-eNB向EPC发送切换请求消息，其中T-gNB的标识信息。EPC接收到S-eNB的切换请求消息后，根据终端建立的业务类型，例如是低时延的业务，或者是语音业务，或者是任何5G CN不能支持的业务，EPC决定不更换终端的核心网，并反馈给S-eNB。或者，
步骤2b+2c：S-eNB向EPC发送切换请求消息；EPC发送切换请求到5G CN。5G CN接收到EPC的切换请求消息后，根据业务类型，例如是低时延的业务，或者是语音业务，或者是任何5G CN不能支持的业务，5G CN决定不更换终端的核心网，并反馈给EPC和S-eNB。或者，
步骤3+4+5：S-eNB向T-gNB发送切换(HO)请求消息，其中携带不更换终端的核心网的指示信息；T-gNB通知5G CN不更换终端的核心网，5G CN确认不更换终端的核心网；T-gNB向S-eNB发送HO请求确认消息，其中携带T-gNB为UE分配的资源信息。
上述方案中，步骤2a、步骤2b、步骤2b+2c、步骤3+4+5均可以确定出不更换终端的核心网。
步骤6：S-eNB向UE发送HO命令。
步骤7：UE向T-gNB发送HO完成消息。
步骤8：T-gNB向S-eNB发送HO确认消息。
图7为本发明实施例的切换装置的结构组成示意图，如图7所示，所述切换装置包括：
确定单元701，用于根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
传输单元702，用于接收第二接入网网元转发的所述终端的数据，并将所述数据发送给第一核心网网元。
在一实施方式中，所述确定单元701，包括：
第一确定子单元7011，用于根据所述终端的能力信息和/或所述第二接入网网元的能力信息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述确定单元701，包括：
第二确定子单元7012，用于发送第一切换请求消息，以使所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；基于来自所述第一核心网网元或者第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
如果所述第一核心网网元或者第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，如果所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
所述第二确定子单元7012，用于向所述第一核心网网元发送第一切换请求消息。
在一实施方式中，如果所述第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
所述第二确定子单元7012，用于向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
在一实施方式中，所述确定单元701，包括：
第三确定子单元7013，用于发送第二切换请求消息，其中，所述第二 切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
在一实施方式中，所述第三确定子单元7013，用于向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第二切换请求消息。
在一实施方式中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
在一实施方式中，所述装置还包括：
切换控制单元703，用于向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
切换确认单元704，用于接收所述第二接入网网元发送的切换确认消息。
本领域技术人员应当理解，图7所示的切换装置中的各单元的实现功能可参照前述切换方法的相关描述而理解。图7所示的切换装置中的各单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
本发明实施例上述切换装置如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read Only Memory)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，其中存储有计算机可执行指令，该计算机可执行指令被处理器执行时实现本发明实施例的上述切换方法。
图8为本发明实施例的计算机设备的结构组成示意图，该计算机设备可以是终端，也可以是网络设备。如图8所示，计算机设备100可以包括一个或多个(图中仅示出一个)处理器1002(处理器1002可以包括但不限于微处理器(MCU，Micro Controller Unit)或可编程逻辑器件(FPGA，Field Programmable Gate Array)等的处理装置)、用于存储数据的存储器1004、
以及用于通信功能的传输装置1006。本领域普通技术人员可以理解，图8 所示的结构仅为示意，其并不对上述电子装置的结构造成限定。例如，计算机设备100还可包括比图8中所示更多或者更少的组件，或者具有与图8所示不同的配置。
存储器1004可用于存储应用软件的软件程序以及模块，如本发明实施例中的方法对应的程序指令/模块，处理器1002通过运行存储在存储器1004内的软件程序以及模块，从而执行各种功能应用以及数据处理，即实现上述的方法。存储器1004可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器1004可进一步包括相对于处理器1002远程设置的存储器，这些远程存储器可以通过网络连接至计算机设备100。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
传输装置1006用于经由一个网络接收或者发送数据。上述的网络具体实例可包括计算机设备100的通信供应商提供的无线网络。在一个实例中，传输装置1006包括一个网络适配器(NIC，Network Interface Controller)，其可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输装置1006可以为射频(RF，Radio Frequency)模块，其用于通过无线方式与互联网进行通讯。
本发明实施例所记载的技术方案之间，在不冲突的情况下，可以任意组合。
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和智能设备，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个第二处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。

Claims (21)

  1. 一种切换方法，所述方法包括：
    第一接入网网元根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
    所述第一接入网网元接收第二接入网网元转发的所述终端的数据，并将所述数据发送给第一核心网网元。
  2. 根据权利要求1所述的方法，其中，所述第一接入网网元根据第一信息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
    所述第一接入网网元根据所述终端的能力信息和/或所述第二接入网网元的能力信息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  3. 根据权利要求1所述的方法，其中，所述第一接入网网元根据接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
    所述第一接入网网元发送第一切换请求消息，以使所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
    所述第一接入网网元基于来自所述第一核心网网元或者第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  4. 根据权利要求3所述的方法，其中，所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
    如果所述第一核心网网元或者第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  5. 根据权利要求3或4所述的方法，其中，如果所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
    所述第一接入网网元发送第一切换请求消息，包括：
    所述第一接入网网元向所述第一核心网网元发送第一切换请求消息。
  6. 根据权利要求3或4所述的方法，其中，如果所述第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网 时，保持所述第一接入网和第一核心网的连接不变，则：
    所述第一接入网网元发送第一切换请求消息，包括：
    所述第一接入网网元向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
  7. 根据权利要求1所述的方法，其中，所述第一接入网网元根据接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
    所述第一接入网网元发送第二切换请求消息，其中，所述第二切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；
    所述第一接入网网元基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  8. 根据权利要求7所述的方法，其中，所述第一接入网网元发送第二切换请求消息，包括：
    所述第一接入网网元向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第二切换请求消息。
  9. 根据权利要求7或8所述的方法，其中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
  10. 根据权利要求1至9任一项所述的方法，其中，所述方法还包括：
    所述第一接入网网向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
    所述第一接入网网元接收所述第二接入网网元发送的切换确认消息。
  11. 一种切换装置，所述装置包括：
    确定单元，用于根据第一信息或者接收到的第一消息确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；
    传输单元，用于接收第二接入网网元转发的所述终端的数据，并将所述数据发送给第一核心网网元。
  12. 根据权利要求11所述的装置，其中，所述确定单元，包括：
    第一确定子单元，用于根据所述终端的能力信息和/或所述第二接入网网元的能力信息，确定终端由第一接入网切换到第二接入网时，保持 所述第一接入网和第一核心网的连接不变。
  13. 根据权利要求11所述的装置，其中，所述确定单元，包括：
    第二确定子单元，用于发送第一切换请求消息，以使所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变；基于来自所述第一核心网网元或者第二核心网网元的切换反馈消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  14. 根据权利要求13所述的装置，其中，所述第一核心网网元或者第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，包括：
    如果所述第一核心网网元或者第二核心网网元确定所述第二核心网网元不支持所述终端的业务类型，则确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  15. 根据权利要求13或14所述的装置，其中，如果所述第一核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
    所述第二确定子单元，用于向所述第一核心网网元发送第一切换请求消息。
  16. 根据权利要求13或14所述的装置，其中，如果所述第二核心网网元根据所述终端的业务类型确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，则：
    所述第二确定子单元，用于向所述第二核心网网元发送第一切换请求消息或者经所述第一核心网网元向所述第二核心网网元发送第一切换请求消息。
  17. 根据权利要求11所述的装置，其中，所述确定单元，包括：
    第三确定子单元，用于发送第二切换请求消息，其中，所述第二切换请求消息携带指示信息，所述指示信息用于指示终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变，以使第二核心网网元对所述第二切换请求消息进行确认并反馈切换请求确认消息；基于所述切换请求确认消息，确定终端由第一接入网切换到第二接入网时，保持所述第一接入网和第一核心网的连接不变。
  18. 根据权利要求17所述的装置，其中，所述第三确定子单元，用于向第二核心网网元发送第二切换请求消息或者经所述第二接入网网元向所述第二核心网网元发送第二切换请求消息。
  19. 根据权利要求17或18所述的装置，其中，所述切换请求确认消息中携带所述第二接入网网元为所述终端分配的资源。
  20. 根据权利要求11至19任一项所述的装置，其中，所述装置还 包括：
    切换控制单元，用于向所述终端发送切换命令，其中，所述终端完成由第一接入网切换到第二接入网后向所述第二接入网发送切换完成消息；
    切换确认单元，用于接收所述第二接入网网元发送的切换确认消息。
  21. 一种计算机存储介质，其上存储有计算机可执行指令，该计算机可执行指令被处理器执行时实现权利要求1至10任一项所述的方法步骤。
PCT/CN2018/072900 2018-01-16 2018-01-16 一种切换方法及装置、计算机存储介质 WO2019140560A1 (zh)

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