WO2019140561A1 - 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
WO2019140561A1
WO2019140561A1 PCT/CN2018/072908 CN2018072908W WO2019140561A1 WO 2019140561 A1 WO2019140561 A1 WO 2019140561A1 CN 2018072908 W CN2018072908 W CN 2018072908W WO 2019140561 A1 WO2019140561 A1 WO 2019140561A1
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WIPO (PCT)
Prior art keywords
access network
core network
network element
terminal
network
Prior art date
Application number
PCT/CN2018/072908
Other languages
English (en)
French (fr)
Inventor
刘建华
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 JP2020538962A priority Critical patent/JP2021515439A/ja
Priority to KR1020207022845A priority patent/KR20200109332A/ko
Priority to CN201880085956.2A priority patent/CN111567085A/zh
Priority to PCT/CN2018/072908 priority patent/WO2019140561A1/zh
Priority to AU2018403582A priority patent/AU2018403582A1/en
Priority to EP18901437.6A priority patent/EP3742797B1/en
Publication of WO2019140561A1 publication Critical patent/WO2019140561A1/zh
Priority to US16/930,180 priority patent/US11129060B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/02Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • H04W36/144Reselecting a network or an air interface over a different radio air interface technology
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

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 sends a first handover request message to the second access network network element, to trigger the terminal to be handed over by the first access network to the second access network, including:
  • the first access network element receives the handover confirmation message sent by the network element of the second access network, and completes that the terminal is handed over to the second access network by the first access network.
  • the first handover request message, the handover request acknowledgement message, and the handover confirmation message are transmitted by using the following path:
  • the handover request acknowledgement message carries the resource allocated by the second access network for the terminal.
  • the data of the terminal is transmitted between the first access network and the first core network by using the forwarding of the second access network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network forwards the data to the first access network, and in the first access network and the first core Transmission between networks;
  • the first access network After the downlink data of the terminal is sent by the first core network to the first access network, the first access network sends the data to the second access network, and passes the second access The network forwards to the terminal.
  • the first core network element receives the first access network and sends the first access network.
  • a second handover request message where the second handover request message is used to trigger the first core network to switch to the second core network; wherein, after the first core network switches to the second core network, the terminal The data is transmitted between the second access network and the second core network.
  • the second handover request message carries a first indication message, where the first indication message is used to indicate that the terminal completes handover by the first access network to the second access network.
  • the first core network element receives the second handover request message sent by the first access network, and the second handover request message is used to trigger the first core network to switch to the second core.
  • Net including:
  • the first core network element After receiving the second handover request message sent by the first access network, the first core network element sends a second indication message to the third core network element, where the second indication message is used to indicate Session management context modification;
  • the first core network element sends a third handover request message to the second core network element to trigger the second core network element to establish a target link in the second core network.
  • the second core network element establishes a target link in the second core network, including:
  • the second core network element establishes a link channel with the fourth core network element
  • the second core network element establishes a link channel with the second access network element.
  • the method further includes:
  • the second core network element notifies the sixth core network element to perform user plane path switching.
  • the data of the terminal is transmitted between the second access network and the second core network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network sends the uplink data to the second core network;
  • the downlink data of the terminal is sent by the second core network to the second access network, and then sent by the second access network to the terminal.
  • a first sending unit configured to send a first handover request message to the second access network network element, to trigger the terminal to be handed over by the first access network to the second access network, and maintain the first access network and the first The connection of a core network is unchanged; wherein data of the terminal is transmitted between the first access network and the first core network by forwarding of the second access network;
  • a second sending unit configured to send a second handover request message to the first core network element, to trigger the first core network to switch to the second core network, where the data of the terminal is in the second access Transmission between the network and the second core network.
  • the device further includes:
  • a first receiving unit configured to receive a handover request acknowledgement message sent by the second access network network element
  • a third sending unit configured to send a handover command to the terminal, so that the terminal sends a handover complete message to the second access network network element;
  • the second receiving unit is configured to receive a handover confirmation message sent by the network element of the second access network, and complete the handover of the terminal by the first access network to the second access network.
  • the first handover request message, the handover request acknowledgement message, and the handover confirmation message are transmitted by using the following path:
  • the handover request acknowledgement message carries the resource allocated by the second access network for the terminal.
  • the data of the terminal is transmitted between the first access network and the first core network by using the forwarding of the second access network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network forwards the data to the first access network, and in the first access network and the first core Transmission between networks;
  • the first access network After the downlink data of the terminal is sent by the first core network to the first access network, the first access network sends the data to the second access network, and passes the second access The network forwards to the terminal.
  • a first receiving unit configured to: after the terminal is switched by the first access network to the second access network, and after the connection between the first access network and the first core network is kept unchanged, receiving the first access network Sending a second handover request message, where the second handover request message is used to trigger the first core network to switch to the second core network; where the first core network switches to the second core network, The data of the terminal is transmitted between the second access network and the second core network.
  • the second handover request message carries a first indication message, where the first indication message is used to indicate that the terminal completes handover to the second access network by the first access network.
  • the device further includes:
  • a first sending unit configured to send a second indication message to the third core network element, where the second indication message is used to indicate that the session management context is modified;
  • a second sending unit configured to send a third handover request message to the second core network element to trigger the second core network element to establish a target link in the second core network.
  • the second core network element establishes a target link in the second core network, including:
  • the second core network element establishes a link channel with the fourth core network element
  • the second core network element establishes a link channel with the second access network element.
  • the device further includes:
  • a second receiving unit configured to receive a target link setup complete message sent by the second core network element
  • the notification unit is configured to notify the fifth core network element to perform user plane path switching.
  • the data of the terminal is transmitted between the second access network and the second core network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network sends the uplink data to the second core network;
  • the downlink data of the terminal is sent by the second core network to the second access network, and then sent by the second access network to the terminal.
  • 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 sends a first handover request message to the second access network element to trigger the terminal to be handed over from the first access network to the second access network, and keep The connection between the first access network and the first core network is unchanged; wherein, the data of the terminal is forwarded by the second access network in the first access network and the first core network Transmitting; the first access network element sends a second handover request message to the first core network element to trigger the first core network to switch to the second core network; wherein the data of the terminal is in the Transmitting between the second access network and the second core network.
  • the access network is switched first, and then the core network is switched. The step-by-step switching mode improves the reliability of the handover, reduces the service delay, and improves 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 System switching in a connected state scenario (ie, a core network changes from 5G CN to 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 flowchart 3 of a handover method according to an embodiment of the present invention.
  • FIG. 8 is a first schematic structural diagram of a switching device according to an embodiment of the present invention.
  • FIG. 9 is a second schematic structural diagram of a switching device according to an embodiment of the present invention.
  • FIG. 10 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 invention provides a handover method.
  • the handover is performed in two steps. The first step is to first switch the source access network of the terminal to the target access network; the second step is to switch the source core network of the terminal to the target core network.
  • the first access network refers to a source access network
  • the second access network refers to a target access network
  • the first core network refers to a source core network
  • the second core network refers to a target core network.
  • the source access network and the source core network are used as the 5G system
  • the target access network and the target core network are used as the 4G system. It should be understood that the source access network and the source core network are not limited to the 5G system, and the target access network and the target core network are not limited to the 4G system.
  • the first access network element refers to the source access network element.
  • the second access network element refers to the target access network element.
  • the first core network element refers to AMF
  • the third core network element refers to SMF+PGW-C (ie, SMF/PGW-C)
  • the fifth core network element refers to UPF+PGW-U. (also known as UPF/PGW-U).
  • the second core network element refers to the MME
  • the fourth core network element refers to the SGW
  • the sixth core network element refers to the UPF+PGW-U (ie, UPF/PGW-U).
  • 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 sends a first handover request message to the second access network network element, to trigger the terminal to be handed over by the first access network to the second access network, and keep the first access
  • the connection between the network and the first core network is unchanged; wherein data of the terminal is transmitted between the first access network and the first core network by forwarding of the second access network.
  • 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 core network switching is performed in two steps, and the first step is to perform the switching of the access network, that 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 process for the terminal to be handed over from the first access network to the second access network is as follows:
  • the first access network network element sends a first handover request message to the second access network network element
  • the first access network network element receives a handover request acknowledgement message sent by the second access network network element
  • the first access network network element sends a handover command to the terminal, so that the terminal sends a handover complete message to the second access network network element;
  • the first access network element receives the handover confirmation message sent by the network element of the second access network, and completes that the terminal is handed over to the second access network by the first access network.
  • the first handover request message, the handover request acknowledgement message, and the handover confirmation message are transmitted by using the following path:
  • the handover request acknowledgement message carries the resource allocated by the second access network to the terminal.
  • the data of the terminal is transmitted between the first access network and the first core network by using the forwarding of the second access network, including:
  • Step 502 The first access network element sends a second handover request message to the first core network element to trigger the first core network to switch to the second core network, where the data of the terminal is in the Transmitting between the second access network and the second core network.
  • the process of switching the first core network to the second core network is as follows:
  • the first core network element After receiving the second handover request message sent by the first access network, the first core network element sends a second indication message to the third core network element, where the second indication message is used. Instructing to perform session management context modification;
  • the first core network element sends a third handover request message to the second core network element to trigger the second core network element to establish a target link in the second core network.
  • the second core network element establishes a target link in the second core network, including:
  • the second core network element establishes a link channel with the fourth core network element
  • the second core network element establishes a link channel with the second access network element.
  • the first core network element receives the target link setup complete message sent by the second core network element, and notifies the fifth core network element to perform user plane path switching; and/or the second The core network element notifies the sixth core network element to perform user plane path switching.
  • the data of the terminal is transmitted between the second access network and the second core network, including:
  • 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 601 The terminal is switched by the first access network to the second access network, and after the connection between the first access network and the first core network is kept unchanged, the first core network element receives the first access network.
  • a second handover request message sent by the network where the second handover request message is used to trigger the first core network to switch to the second core network; wherein, after the first core network switches to the second core network, The data of the terminal is transmitted between the second access network and the second core network.
  • the second handover request message carries a first indication message, where the first indication message is used to indicate that the terminal completes handover by the first access network to the second access network.
  • the process of switching the first core network to the second core network is as follows:
  • the first core network element After receiving the second handover request message sent by the first access network, the first core network element sends a second indication message to the third core network element, where the second indication message is used. Instructing to perform session management context modification;
  • the first core network element sends a third handover request message to the second core network element to trigger the second core network element to establish a target link in the second core network.
  • the second core network element establishes a target link in the second core network, including:
  • the second core network element establishes a link channel with the fourth core network element
  • the second core network element establishes a link channel with the second access network element.
  • the first core network element receives the target link setup complete message sent by the second core network element, and notifies the fifth core network element to perform user plane path switching; and/or the second The core network element notifies the sixth core network element to perform user plane path switching.
  • the data of the terminal is transmitted between the second access network and the second core network, including:
  • FIG. 7 is a schematic flowchart 3 of a handover method according to an embodiment of the present invention. As shown in FIG. 7, 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-gNB when the measurement report reporting condition preset by the network is met.
  • MR measurement report
  • the S-gNB is a source access network element of the UE.
  • the S-gNB After receiving the MR sent by the UE, the S-gNB determines that the system switching needs to be performed according to the MR.
  • step 2 the S-gNB sends a handover request message (HO request) to the T-eNB.
  • HO request handover request message
  • the T-eNB is a target access network element of the UE.
  • Step 3 The T-eNB sends a handover request acknowledgement message (HO request ACK) to the S-gNB, where the T-eNB carries the resource allocated by the terminal.
  • HO request ACK handover request acknowledgement message
  • Step 4 The S-gNB sends a handover command (HO command) to the UE.
  • HO command handover command
  • step 5 the UE sends a handover complete message (HO complete) to the T-eNB.
  • Step 6 After receiving the handover complete message sent by the UE, the T-eNB sends a handover confirm message (HO confirm) to the S-gNB.
  • HO confirm handover confirm
  • step 2 if there is no direct interface between the S-gNB and the T-eNB, the messages in step 2, step 3, and step 6 can be forwarded through the AMF and the MME.
  • Step 7 After receiving the handover complete message sent by the T-eNB, the S-gNB sends a core network link switch request to the AMF.
  • the core network link switch request may carry an indication message that the air interface has been switched completed. .
  • the S-gNB will forward the user plane data sent to the UE to the T-eNB from step 7, and the T-eNB sends the data to the UE; the T-eNB forwards the received UE data to the S-gNB, S-gNB.
  • the terminal's data is sent to the AMF (path 2 in Figure 7).
  • step 8 the AMF sends a session management context modification indication to the SMF/PGW-C requesting to modify the session context.
  • step 9 the AMF sends a handover request message to the MME, requesting the MME to establish a target link.
  • step 10 the MME establishes a link channel with the SGW.
  • step 11 the MME establishes a link channel with the T-eNB.
  • step 12 the MME notifies the AMF that the target link channel is established.
  • step 13a+13b or step 14a+14b the AMF or the MME notifies the UPF/PGW-U to perform user plane path switching through the SMF/PGW-C or the SGW, respectively.
  • the data of the UE and the network are transmitted through the target network link (path 3 in Fig. 7).
  • FIG. 8 is a first schematic structural diagram of a switching device according to an embodiment of the present invention. As shown in FIG. 8, the switching device includes:
  • the first sending unit 801 is configured to send a first handover request message to the second access network network element, to trigger the terminal to be handed over by the first access network to the second access network, and maintain the first access network and The connection of the first core network is unchanged; wherein data of the terminal is transmitted between the first access network and the first core network by forwarding of the second access network;
  • the second sending unit 802 is configured to send a second handover request message to the first core network element to trigger the first core network to switch to the second core network, where the data of the terminal is in the second connection
  • the network is transmitted between the network and the second core network.
  • the device further includes:
  • the first receiving unit 803 is configured to receive a handover request acknowledgement message sent by the second access network network element.
  • the third sending unit 804 is configured to send a handover command to the terminal, so that the terminal sends a handover complete message to the second access network network element;
  • the second receiving unit 805 is configured to receive a handover confirmation message sent by the second access network network element, and complete the handover of the terminal by the first access network to the second access network.
  • the first handover request message, the handover request acknowledgement message, and the handover confirmation message are transmitted by using the following path:
  • the handover request acknowledgement message carries the resource allocated by the second access network to the terminal.
  • the data of the terminal is transmitted between the first access network and the first core network by using the forwarding of the second access network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network forwards the data to the first access network, and in the first access network and the first core Transmission between networks;
  • the first access network After the downlink data of the terminal is sent by the first core network to the first access network, the first access network sends the data to the second access network, and passes the second access The network forwards to the terminal.
  • the implementation functions of the units in the switching apparatus shown in FIG. 8 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. 8 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • FIG. 9 is a second schematic structural diagram of a switching apparatus according to an embodiment of the present invention. As shown in FIG. 9, the switching apparatus includes:
  • the first receiving unit 901 is configured to receive the first access network after the terminal is switched by the first access network to the second access network, and the connection between the first access network and the first core network is kept unchanged. a second handover request message sent by the network, where the second handover request message is used to trigger the first core network to switch to the second core network; wherein, after the first core network switches to the second core network, The data of the terminal is transmitted between the second access network and the second core network.
  • the second handover request message carries a first indication message, where the first indication message is used to indicate that the terminal completes handover by the first access network to the second access network.
  • the device further includes:
  • the first sending unit 902 is configured to send a second indication message to the third core network element, where the second indication message is used to indicate that the session management context is modified.
  • the second sending unit 903 is configured to send a third handover request message to the second core network element to trigger the second core network element to establish a target link in the second core network.
  • the second core network element establishes a target link in the second core network, including:
  • the second core network element establishes a link channel with the fourth core network element
  • the second core network element establishes a link channel with the second access network element.
  • the device further includes:
  • the second receiving unit 904 is configured to receive a target link setup complete message sent by the second core network element.
  • the notification unit 905 is configured to notify the fifth core network element to perform user plane path switching.
  • the data of the terminal is transmitted between the second access network and the second core network, including:
  • the second access network After the uplink data of the terminal is sent to the second access network, the second access network sends the uplink data to the second core network;
  • the downlink data of the terminal is sent by the second core network to the second access network, and then sent by the second access network to the terminal.
  • 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. 10 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.
  • a processing device such as an FPGA (Field Programmable Gate Array), a memory 1004 for storing data, and a transmission device 1006 for a communication function.
  • FPGA Field Programmable Gate Array
  • FIG. 10 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. 10, 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:第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;所述第一接入网网元向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。

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。在现在的跨系统(即跨核心网)的切换过程中,目标网络链路和资源准备阶段步骤太多,如果终端移动速度过快,可能导致切换命令下发过晚,导致切换失败。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:
第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;
所述第一接入网网元向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二 接入网和所述第二核心网之间传输。
本发明实施例中,所述第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,包括:
所述第一接入网网元向所述第二接入网网元发送第一切换请求消息;
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请求确认消息;
所述第一接入网网元向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
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,完成所述终端由所述第一接入网切换到所述第二接入网。
本发明实施例中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
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为所述终端分配的资源。
本发明实施例中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发至所述终端。
本发明实施例提供的切换方法,包括:
终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,第一核心网网元接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
本发明实施例中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网。
本发明实施例中,所述第一核心网网元接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网,包括:
所述第一核心网网元接收到所述第一接入网网发送的第二切换请求消 息后,向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
所述第一核心网网元向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
本发明实施例中,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
所述第二核心网网元建立与第四核心网网元之间的链路通道;
所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
本发明实施例中,所述第二核心网网元建立所述第二核心网中的目标链路后,所述方法还包括:
所述第一核心网网元接收所述第二核心网网元发送的目标链路建立完成消息,并通知第五核心网网元进行用户面路径切换;和/或,
所述第二核心网网元通知第六核心网网元进行用户面路径切换。
本发明实施例中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
本发明实施例提供的切换装置,包括:
第一发送单元,用于向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;
第二发送单元,用于向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
本发明实施例中,所述装置还包括:
第一接收单元,用于接收所述第二接入网网元发送的切换请求确认消息;
第三发送单元,用于向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
第二接收单元,用于接收所述第二接入网网元发送的切换确认消息,完成所述终端由所述第一接入网切换到所述第二接入网。
本发明实施例中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
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为所述终端分配的资源。
本发明实施例中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发至所述终端。
本发明实施例提供的切换装置,包括:
第一接收单元,用于在终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
本发明实施例中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网
本发明实施例中,所述装置还包括:
第一发送单元,用于向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
第二发送单元,用于向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
本发明实施例中,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
所述第二核心网网元建立与第四核心网网元之间的链路通道;
所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
本发明实施例中,所述装置还包括:
第二接收单元,用于接收所述第二核心网网元发送的目标链路建立完成消息;
通知单元,用于通知第五核心网元进行用户面路径切换。
本发明实施例中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
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,第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;所述第一接入网网元向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。采用本发明实施例的技术方案,先进行接入网切换,再进行核心网切换,这种分步切换方式提高了切换的可靠性,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方法的流程示意图三;
图8为本发明实施例的切换装置的结构组成示意图一;
图9为本发明实施例的切换装置的结构组成示意图二;
图10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,切换分成两步执行。第一步是先将终端的源接入网切换到目标接入网;第二步将终端的源核心网切换到目标核心网。
本发明实施例的以下技术方案中,第一接入网指源接入网,第二接入网指目标接入网;第一核心网指源核心网,第二核心网指目标核心网。以下实施例中,以源接入网和源核心网为5G系统为例,以目标接入网和目标核心网为4G系统为例。应理解,源接入网和源核心网不局限于5G系统,目标接入网和目标核心网也不局限于4G系统。
在第一接入网中,第一接入网网元指源接入网网元。
在第二接入网中,第二接入网网元指目标接入网网元。
在第一核心网中,第一核心网网元指AMF,第三核心网网元指SMF+PGW-C(也即SMF/PGW-C),第五核心网网元指UPF+PGW-U(也即UPF/PGW-U)。
在第二核心网中,第二核心网网元指MME,第四核心网网元指SGW,第六核心网网元指UPF+PGW-U(也即UPF/PGW-U)。
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:第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输。
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,核心网切换分两步执行,第一步进行接入网的切换,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。
具体地,终端由第一接入网切换到第二接入网的流程如下:
1)所述第一接入网网元向所述第二接入网网元发送第一切换请求消息;
2)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请求确认消息;
3)所述第一接入网网元向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
4)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,完成所述终端由所述第一接入网切换到所述第二接入网。
本发明实施例中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
1)通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
2)通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
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为所述终端分配的资源。
本发明实施例中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
1)上行传输:所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
2)下行传输:所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发至所述终端。
步骤502:所述第一接入网网元向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
本发明实施例中,第一核心网切换到第二核心网的流程如下:
1)所述第一核心网网元接收到所述第一接入网网发送的第二切换请求消息后,向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
2)所述第一核心网网元向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
这里,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
所述第二核心网网元建立与第四核心网网元之间的链路通道;
所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
3)所述第一核心网网元接收所述第二核心网网元发送的目标链路建立完成消息,并通知第五核心网网元进行用户面路径切换;和/或,所述第二核心网网元通知第六核心网网元进行用户面路径切换。
本发明实施例中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
1)上行传输:所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
2)下行传输:所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
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601:终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,第一核心网网元接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
在一实施方式中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网。
本发明实施例中,第一核心网切换到第二核心网的流程如下:
1)所述第一核心网网元接收到所述第一接入网网发送的第二切换请求消息后,向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
2)所述第一核心网网元向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
这里,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
所述第二核心网网元建立与第四核心网网元之间的链路通道;
所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
3)所述第一核心网网元接收所述第二核心网网元发送的目标链路建立完成消息,并通知第五核心网网元进行用户面路径切换;和/或,所述第二核心网网元通知第六核心网网元进行用户面路径切换。
本发明实施例中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
1)上行传输:所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
2)下行传输:所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
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7为本发明实施例的切换方法的流程示意图三,如图7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-gNB上报测量报告(MR)。
这里,S-gNB为UE的源接入网网元。
S-gNB接收到UE发送的MR后,根据MR判断出需要进行System切换。
步骤2,S-gNB向T-eNB发送切换请求消息(HO request)。
这里,T-eNB为UE的目标接入网网元。
步骤3,T-eNB向S-gNB发送切换请求确认消息(HO request ACK), 其中携带T-eNB为终端分配的资源。
步骤4,S-gNB向UE下发切换命令(HO command)。
步骤5,UE向T-eNB发送切换完成消息(HO complete)。
步骤6,T-eNB接收到UE发送的切换完成消息后,向S-gNB发送切换确认消息(HO confirm)。
上述步骤中,如果S-gNB与T-eNB之间没有直接接口,则步骤2、步骤3、步骤6中的消息可以通过AMF和MME转发。
步骤7,S-gNB接收到T-eNB发送的切换完成消息后,向AMF发送核心网链路切换请求,在一实施方式中,核心网链路切换请求中可以携带空口已经切换完成的指示消息。
S-gNB将从步骤7开始将发送给UE的用户面数据递交到T-eNB,T-eNB将数据发送给UE;T-eNB将接收到的UE的数据转交给S-gNB,S-gNB将终端的数据发送给AMF(图7中的路径2)。
步骤8,AMF向SMF/PGW-C发送会话管理上下文修改指示,要求修改会话上下文。
步骤9,AMF向MME发送切换请求消息,请求MME建立目标链路。
步骤10,MME建立与SGW之间的链路通道。
步骤11,MME建立与T-eNB之间的链路通道。
步骤12,MME通知AMF目标链路通道建立完成。
步骤13a+13b或步骤14a+14b,AMF或者MME分别通过SMF/PGW-C或者SGW通知UPF/PGW-U进行用户面路径切换。从此步骤之后,UE和网络的数据通过目标网络链路传输(图7中的路径3)。
图8为本发明实施例的切换装置的结构组成示意图一,如图8所示,所述切换装置包括:
第一发送单元801,用于向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;
第二发送单元802,用于向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
在一实施方式中,所述装置还包括:
第一接收单元803,用于接收所述第二接入网网元发送的切换请求确认消息;
第三发送单元804,用于向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
第二接收单元805,用于接收所述第二接入网网元发送的切换确认消息,完成所述终端由所述第一接入网切换到所述第二接入网。
在一实施方式中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
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为所述终端分配的资源。
在一实施方式中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发至所述终端。
本领域技术人员应当理解,图8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8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。
图9为本发明实施例的切换装置的结构组成示意图二,如图9所示,所述切换装置包括:
第一接收单元901,用于在终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
在一实施方式中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网
在一实施方式中,所述装置还包括:
第一发送单元902,用于向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
第二发送单元903,用于向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
在一实施方式中,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
所述第二核心网网元建立与第四核心网网元之间的链路通道;
所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
在一实施方式中,所述装置还包括:
第二接收单元904,用于接收所述第二核心网网元发送的目标链路建立完成消息;
通知单元905,用于通知第五核心网元进行用户面路径切换。
在一实施方式中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
本领域技术人员应当理解,图9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9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10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10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10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10中所示更多或者更少的组件,或者具有与图10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 (23)

  1. 一种切换方法,所述方法包括:
    第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;
    所述第一接入网网元向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
  2. 根据权利要求1所述的方法,其中,所述第一接入网网元向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,包括:
    所述第一接入网网元向所述第二接入网网元发送第一切换请求消息;
    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请求确认消息;
    所述第一接入网网元向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
    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,完成所述终端由所述第一接入网切换到所述第二接入网。
  3. 根据权利要求2所述的方法,其中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
    通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
    通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
  4. 根据权利要求2或3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为所述终端分配的资源。
  5. 根据权利要求1至4任一项所述的方法,其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
    所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
    所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发 至所述终端。
  6. 一种切换方法,所述方法包括:
    终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,第一核心网网元接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
  7. 根据权利要求6所述的方法,其中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网。
  8. 根据权利要求6所述的方法,其中,所述第一核心网网元接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网,包括:
    所述第一核心网网元接收到所述第一接入网网发送的第二切换请求消息后,向第三核心网网元发送第二指示消息,所述第二指示消息用于指示进行会话管理上下文修改;
    所述第一核心网网元向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
  9. 根据权利要求8所述的方法,其中,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
    所述第二核心网网元建立与第四核心网网元之间的链路通道;
    所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
  10. 根据权利要求8或9所述的方法,其中,所述第二核心网网元建立所述第二核心网中的目标链路后,所述方法还包括:
    所述第一核心网网元接收所述第二核心网网元发送的目标链路建立完成消息,并通知第五核心网网元进行用户面路径切换;和/或,
    所述第二核心网网元通知第六核心网网元进行用户面路径切换。
  11. 根据权利要求6至10任一项所述的方法,其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
    所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
    所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
  12. 一种切换装置,所述装置包括:
    第一发送单元,用于向第二接入网网元发送第一切换请求消息,以触发终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变;其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输;
    第二发送单元,用于向第一核心网网元发送第二切换请求消息,以触发所述第一核心网切换到第二核心网;其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
  13. 根据权利要求12所述的装置,其中,所述装置还包括:
    第一接收单元,用于接收所述第二接入网网元发送的切换请求确认消息;
    第三发送单元,用于向所述终端发送切换命令,从而所述终端向所述第二接入网网元发送切换完成消息;
    第二接收单元,用于接收所述第二接入网网元发送的切换确认消息,完成所述终端由所述第一接入网切换到所述第二接入网。
  14. 根据权利要求13所述的装置,其中,所述第一切换请求消息、所述切换请求确认消息以及所述切换确认消息,通过以下路径传输:
    通过所述第一接入网网元与所述第二接入网网元之间的直接接口进行传输;或者,
    通过所述第一接入网网元与所述第二接入网网元之间的所述第一核心网网元和第二核心网网元进行转发。
  15. 根据权利要求13或14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为所述终端分配的资源。
  16. 根据权利要求12至15任一项所述的装置,其中,所述终端的数据经所述第二接入网的转发在所述第一接入网和所述第一核心网之间传输,包括:
    所述终端的上行数据发送至所述第二接入网后,由所述第二接入网转发至所述第一接入网,并在所述第一接入网和所述第一核心网之间传输;
    所述终端的下行数据由所述第一核心网发送至所述第一接入网后,由所述第一接入网发送至所述第二接入网,并通过所述第二接入网转发至所述终端。
  17. 一种切换装置,所述装置包括:
    第一接收单元,用于在终端由第一接入网切换到第二接入网,且保持所述第一接入网和第一核心网的连接不变后,接收第一接入网网发送的第二切换请求消息,所述第二切换请求消息用于触发所述第一核心网切换到第二核心网;其中,所述第一核心网切换到所述第二核心网后,所述终端的数据在所述第二接入网和所述第二核心网之间传输。
  18. 根据权利要求17所述的装置,其中,所述第二切换请求消息中携带第一指示消息,所述第一指示消息用于指示终端完成由所述第一接入网切换到所述第二接入网
  19. 根据权利要求17所述的装置,其中,所述装置还包括:
    第一发送单元,用于向第三核心网网元发送第二指示消息,所述第 二指示消息用于指示进行会话管理上下文修改;
    第二发送单元,用于向所述第二核心网网元发送第三切换请求消息,以触发所述第二核心网网元建立所述第二核心网中的目标链路。
  20. 根据权利要求19所述的装置,其中,所述第二核心网网元建立所述第二核心网中的目标链路,包括:
    所述第二核心网网元建立与第四核心网网元之间的链路通道;
    所述第二核心网网元建立与所述第二接入网网元之间的链路通道。
  21. 根据权利要求19或20所述的装置,其中,所述装置还包括:
    第二接收单元,用于接收所述第二核心网网元发送的目标链路建立完成消息;
    通知单元,用于通知第五核心网元进行用户面路径切换。
  22. 根据权利要求17至21任一项所述的装置,其中,所述终端的数据在所述第二接入网和所述第二核心网之间传输,包括:
    所述终端的上行数据发送至所述第二接入网后,由所述第二接入网发送至所述第二核心网;
    所述终端的下行数据由所述第二核心网发送至所述第二接入网后,由所述第二接入网发送至所述终端。
  23. 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5任一项所述的方法步骤,或者权利要求6至11任一项所述的方法步骤。
PCT/CN2018/072908 2018-01-16 2018-01-16 一种切换方法及装置、计算机存储介质 WO2019140561A1 (zh)

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