WO2019183846A1 - 切换的方法、用户设备、网络设备及计算机存储介质 - Google Patents

切换的方法、用户设备、网络设备及计算机存储介质 Download PDF

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Publication number
WO2019183846A1
WO2019183846A1 PCT/CN2018/080934 CN2018080934W WO2019183846A1 WO 2019183846 A1 WO2019183846 A1 WO 2019183846A1 CN 2018080934 W CN2018080934 W CN 2018080934W WO 2019183846 A1 WO2019183846 A1 WO 2019183846A1
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Prior art keywords
network
connection
network device
indication information
information
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PCT/CN2018/080934
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English (en)
French (fr)
Inventor
刘建华
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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.)
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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 PCT/CN2018/080934 priority Critical patent/WO2019183846A1/zh
Priority to CN201880084607.9A priority patent/CN111543085B/zh
Publication of WO2019183846A1 publication Critical patent/WO2019183846A1/zh

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    • 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
    • H04W36/1443Reselecting a network or an air interface over a different radio air interface technology between licensed networks

Definitions

  • the present invention relates to the field of information processing technologies, and in particular, to a handover method, a user equipment (UE), a network device, and a computer storage medium.
  • UE user equipment
  • the NG-RAN may include a scenario in which the gNB and the eNB access the 5GC core network simultaneously or separately.
  • the handover request message sent to the AMF is the same, and the Target id in the sent message is
  • the AMF cannot currently determine whether to perform RAT handover (5GC unchanged, base station access changes from NR to eNB) or System handover (5GC becomes EPC).
  • an embodiment of the present invention provides a handover method, a user equipment (UE), a network device, and a computer storage medium.
  • UE user equipment
  • the embodiment of the invention provides a method for handover, which is applied to a user equipment UE, and the method includes:
  • the UE initiates an access procedure to the second network, where the information sent in the access procedure carries at least the first indication information.
  • An embodiment of the present invention provides a method for switching, which is applied to a second network device, where the method includes:
  • the first request information carries at least the first indication information.
  • An embodiment of the present invention provides a method for switching, which is applied to a first network device, where the method includes:
  • An embodiment of the present invention provides a UE, including:
  • the first communication unit initiates an access procedure to the second network, where the information sent in the access procedure carries at least the first indication information.
  • the embodiment of the invention provides a second network device, including:
  • the second communication unit acquires the first request information, where the first request information carries at least the first indication information.
  • An embodiment of the present invention provides a first network device, including:
  • the third communication unit sends the first request information to the second network device, where the first request information carries at least the first indication information.
  • a user equipment UE provided by an embodiment of the present invention includes: a processor and a memory for storing a computer program capable of running on the processor,
  • processor is configured to perform the steps of the foregoing method when the computer program is run.
  • a network device provided by an embodiment of the present invention includes: a processor and a memory for storing a computer program capable of running on a processor,
  • processor is configured to perform the steps of the foregoing method when the computer program is run.
  • a computer storage medium is provided by the embodiment of the present invention.
  • the computer storage medium stores computer executable instructions, and the foregoing method steps are implemented when the computer executable instructions are executed.
  • the technical solution of the embodiment of the present invention can carry the first indication information in the message when the UE initiates the access procedure to the second network, and the indication information is used to indicate that the UE is first constructed and then disconnected;
  • the UE can enable the UE to perform uninterrupted cross-system handover of the UE in combination with the dual registration capability.
  • FIG. 1 is a schematic flowchart 1 of a method for switching according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a dual network switching structure
  • FIG. 3 is a schematic flowchart 2 of a method for switching according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a handover process
  • FIG. 6 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a hardware architecture according to an embodiment of the present invention.
  • the embodiment of the invention provides a handover method, which is applied to a user equipment (UE), and includes:
  • the UE initiates an access procedure to the second network, where the information sent in the access procedure carries at least the first indication information.
  • the first indication information may be first built and then broken indication information.
  • the method provided in this embodiment refers to FIG. 1 and includes:
  • Step 101 The UE is in a single registration mode.
  • the UE Before the UE initiates an access procedure to the second network, the UE is in a single registration mode and establishes a connection with the first network.
  • the single registration mode refer to FIG. 2.
  • the current UE only establishes a connection with one of the two networks, that is, a single registration SR mode; the two networks may be 5GS and EPS. Network.
  • the second indication information sent by the network side is received, where the second indication information is used to indicate that the UE accesses the second network, and carries the first indication information.
  • the network side may send the second indication information to the UE, and the indication information also indicates that the UE needs to carry the indication information of the first build and the break during the access process.
  • the second indication information sent by the receiving network side includes: receiving, by the network side, the second indication information sent by the NAS message or the AS layer message.
  • the sending of the access procedure to the network side specifically: sending a location update request message to the first network, where the location update request message carries the GUTI applied by the second network GUTI to the first network. And/or the GUTI sent by the second network to the UE.
  • the GUTI applied to the first network is obtained by mapping the second network GUTI.
  • a process of establishing a second connection with the second network is initiated by the service request process. That is to say, the related information of the second network is first acquired, and then the connection with the second network is established based on the related information.
  • Step 102 The UE is in the dual registration mode, initiates an access procedure to the second network, and maintains a connection with the first network.
  • the dual registration mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • DR mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • both the 5GS and the EPS are simultaneously The networks remain connected.
  • Step 103 After the second network completes switching the first connection to the second connection, releasing the connection with the first network, and the UE returns to the single registration mode. For example, referring to FIG. 2, after completing the connection with the second network, the UE establishes a connection with the second network, that is, the EPS in the figure, and releases the connection with the 5GS; at this time, the UE is in the single registration (SR) mode.
  • SR single registration
  • the UE before the UE moves out of the first network coverage edge in the SR mode, the UE initiates an access procedure in the second network in the DR mode, and establishes a PDN Connection corresponding to the PDU Session being used in the first network. After the PDN Connection is established and the handover of the PDU Session to the PDN Connection is completed, the UE sends a NAS message to the first network side to release the RRC connection, and returns to the SR mode.
  • Step 0 The UE completes registration on the 5GS, and performs data service in the connected state;
  • Step 1 The network side 5G-RAN decides to trigger the handover, and the handover is a “Make before break” mode; the 5G-RAN sends an indication message request (possibly a NAS message or an RRC Reconfig message) to the UE side to indicate the UE. Perform the TAU location update process and carry "Make before break";
  • an indication message request possibly a NAS message or an RRC Reconfig message
  • Step 2 The UE sends a TAU Request (TAU Request) message to the MME of the EPS, which identifies "Make before break” and carries the 4G-GUTI obtained from the 5G-GUTI mapping.
  • TAU Request TAU Request
  • step 1 when the actual process is performed, step 1 is not necessarily performed first, then step 2 is performed first, and Step 1 is performed; that is, the processing may be performed directly from step 2, without step 1, that is, the network side does not need to initiate an indication to the UE to trigger the UE to perform processing, and the UE may directly Execute from step 2.
  • the triggering or processing condition on the UE side may include: performing step 2 according to a pre-configured threshold value, or In order to determine the trigger execution step 2 according to conditions such as pre-configured time, it is not exhaustive here.
  • Step 3 Perform a TAU process across the system 5GS to EPS.
  • the context request sent by the MME to the AMF, which carries the identifier "Make before break", and the AMF initiates the flow of FIG. 5 according to the same, while maintaining the active state of the 5GS side context;
  • Step 4-8 Perform Step-5 to 13 in FIG. 5, where the message carrying the identifier "Make before break" needs to be carried as shown in FIG. 2, specifically: AMF sends a create session request to the PGW. After receiving the indication message, the PGW performs a Modify session request and a Modify session response, and can bind the correspondence between the EPS SM context and the corresponding 5GS SM context, and subsequently establish the user plane.
  • the PDN Connection assigns the same IP address as the corresponding PDU Session; then sends a session establishment response (Create session response) to the AMF; the AMF and the HSS side perform an update location process, where the interactive message indicates the UE It is a DR (Double Registration) mode, so that the UDM does not trigger the 5GS cancel location, that is, does not trigger the 5GS system for release processing.
  • DR Double Registration
  • the MME indicates that it is in the DR mode in the Update location request message, so that the HSS does not trigger the cancel location behavior on the 5GS, that is, the valid MM and SM contexts are still maintained on the 5GS and the EPS.
  • Step 9 The UE is in the DR mode, and the MM context (MM Context) is activated on the network side 5GS and the EPS.
  • the PDN connection and the PDU session can share the same IP address for duplication replication. transmission.
  • Step 10 The AMF sends a TAU reception accept to the UE.
  • the UE or the PGW initiates the establishment of the payload, that is, the UE or the network side initiates the establishment of the PDN connection according to the SM context obtained in the TAU procedure. If the UE initiates, it is the Service request process.
  • Steps 11 and 11b are two-choice: the UE sends a deregistration message to the 5GS to disconnect the original link; or, the PGW SMF/UPF performs a path switch to transfer all data from the PDU session session to the corresponding PDN connection connection. Hosted.
  • the NG-RAN may include a scenario in which the gNB and the eNB access the 5GC core network simultaneously or separately, and for the NR base station, the Handover Require sent to the AMF (the steps in FIG. 5) 1)
  • the message is the same.
  • the AMF cannot currently determine whether to perform RAT handover (5GC is unchanged, the base station accesses from NR becomes eNB) or System Switch (5GC becomes EPC).
  • a process flow of a single registration is illustrated in FIG.
  • Step 4-8 The MME is responsible for obtaining relevant context information from the original core network, and performing operations such as authentication and security processing; and steps 9-16, completing the location update process in the target core network.
  • the above-mentioned prior art scheme flow only supports single registration.
  • the first indication information is carried in the message, and the indication information is used to indicate that the UE is first constructed and then disconnected; Enables the UE to implement uninterrupted cross-system handover of the UE in conjunction with dual registration capabilities.
  • the embodiment of the invention provides a method for switching, which is applied to the second network device, and includes:
  • the first request information carries at least the first indication information.
  • the manner in which the first request information is obtained may include:
  • the first request information sent by the first network device may also be received.
  • the first indication information may be first built and then broken indication information.
  • the UE Before the UE initiates an access procedure to the second network, the UE is in a single registration mode.
  • the single registration mode refer to FIG. 2.
  • the current UE only establishes a connection with one of the two networks, that is, a single registration SR mode; the two networks may be 5GS and EPS. Network.
  • the second indication information sent by the network side is received, where the second indication information is used to indicate that the UE accesses the second network, and carries the first indication information.
  • the network side may send the second indication information to the UE, and the indication information also indicates that the UE needs to carry the indication information of the first build and the break during the access process.
  • the UE sending the access procedure specifically: receiving a location update request message sent by the UE, where the location update request message carries the GUTI applied to the first network and/or the GUTI sent by the second network to the UE. .
  • the GUTI applied to the first network is obtained by mapping the second network GUTI.
  • a process of establishing a second connection with the second network is initiated by the service request process. That is to say, the related information of the second network is first acquired, and then the connection with the second network is established based on the related information.
  • the UE then enters the dual registration mode, initiates an access procedure to the second network, and maintains a connection with the first network.
  • the dual registration mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • DR mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • both the 5GS and the EPS are simultaneously The networks remain connected.
  • the UE After the second network completes switching the first connection to the second connection, releasing the connection with the first network, and the UE returns to the single registration mode. For example, referring to FIG. 2, after completing the connection with the second network, the UE establishes a connection with the second network, that is, the EPS in the figure, and releases the connection with the 5GS; at this time, the UE is in the single registration (SR) mode.
  • SR single registration
  • the UE before the UE moves out of the first network coverage edge in the SR mode, the UE initiates an access procedure in the second network in the DR mode, and establishes a PDN Connection corresponding to the PDU Session being used in the first network. After the PDN Connection is established and the handover of the PDU Session to the PDN Connection is completed, the UE sends a NAS message to the first network side to release the RRC connection, and returns to the SR mode.
  • Step 0 The UE completes registration on the 5GS, and performs data service in the connected state;
  • Step 1 The network side 5G-RAN decides to trigger the handover, and the handover is a “Make before break” mode; the 5G-RAN sends an indication message request (possibly a NAS message or an RRC Reconfig message) to the UE side to indicate the UE. Perform the TAU location update process and carry "Make before break";
  • an indication message request possibly a NAS message or an RRC Reconfig message
  • Step 2 The UE sends a TAU Request (TAU Request) message to the MME of the EPS, and identifies "Make before break" with the 4G-GUTI obtained from the 5G-GUTI mapping;
  • step 1 when the actual process is performed, step 1 is not necessarily performed first, then step 2 is performed first, and Step 1 is performed; that is, the processing may be performed directly from step 2, without step 1, that is, the network side does not need to initiate an indication to the UE to trigger the UE to perform processing, and the UE may directly Execute from step 2.
  • the triggering or processing condition on the UE side may include: performing step 2 according to a pre-configured threshold value, or In order to determine the trigger execution step 2 according to conditions such as pre-configured time, it is not exhaustive here.
  • Step 3 Send a third request message to the third network device, where the first request information is carried in the connection request, where the third network device may be an AMF, and the third request message is used to obtain the third device Having mapped the context information used by the UE on the second network, and keeping the context of the UE on the third network device still in a valid state on the first network; and the third request message may be a context request; Specifically as shown in Figure 3, including:
  • Step 3 Perform a TAU process across the system 5GS to EPS.
  • Step 4-8 Send a setup session request message to the fourth network device, where the setup session request message carries the first indication information, where the setup session request message is used to enable the fourth network device to be bound in the second network Determining a context correspondence relationship with the first network, and allocating the same network address as the first connection in the first network; after receiving the establishment session response information, sending an update location processing message to the fifth network device, maintaining the location The UE has a valid context in both the first network and the second network;
  • the UE In the update location processing message, the UE is in the dual registration mode, so that the fifth network device does not trigger the release address of the UE in the first network; wherein the fourth network device may be an HSS;
  • the AMF sends a create session request to the PGW; after receiving the indication message, the PGW performs a Modify session request and a Modify session response.
  • the binding relationship between the EPS SM context and the corresponding 5GS SM context can be bound.
  • the user plane establishes the PDN Connection, it assigns the same IP address as the corresponding PDU Session; then sends a session establishment response to the AMF (Create session)
  • the AMF and the HSS side perform update location processing, wherein the message in the interaction indicates that the UE is in the DR (Double Registration) mode, so that the UDM does not trigger the cancel location of the 5GS, that is, the 5GS system is not triggered to be released. .
  • the MME Since the "Make before break" indication is received, the MME indicates that it is in the DR mode in the Update location request message, so that the HSS does not trigger the cancel location behavior on the 5GS, that is, the valid MM and SM are still maintained on the 5GS and the EPS.
  • Step 9 The UE is in the DR mode, and the MM context (MM Context) is activated on the network side 5GS and the EPS.
  • the PDN connection and the PDU session can share the same IP address for duplication replication. transmission.
  • Step 10 The AMF sends a TAU reception accept to the UE; after the TAU is executed, the UE or the PGW initiates a dedicated setup, and the PDN connection and the PDU session session may share the same IP address, and may perform duplicate (copy) transmission;
  • the UE or the network side initiates the establishment of the PDN connection according to the SM context obtained in the TAU process. If the UE initiates, it is the Service request process.
  • steps 11 and 11b are two-choice: the UE sends a deregistration message to the 5GS to disconnect the original link; or, the PGW SMF/UPF performs a path switch to transfer all data from the PDU session session to The corresponding PDN connection is carried on the connection.
  • the NG-RAN may include a scenario in which the gNB and the eNB access the 5GC core network simultaneously or separately, and for the NR base station, the Handover Require sent to the AMF (the steps in FIG. 5) 1)
  • the message is the same.
  • the AMF cannot currently determine whether to perform RAT handover (5GC is unchanged, the base station accesses from NR becomes eNB) or System Switch (5GC becomes EPC).
  • a process flow of a single registration is illustrated in FIG.
  • Step 4-8 The MME is responsible for obtaining relevant context information from the original core network, and performing operations such as authentication and security processing; and steps 9-16, completing the location update process in the target core network.
  • the above-mentioned prior art scheme flow only supports single registration.
  • the first indication information is carried in the message, and the indication information is used to indicate that the UE is first constructed and then disconnected; Enables the UE to implement uninterrupted cross-system handover of the UE in conjunction with dual registration capabilities.
  • An embodiment of the present invention provides a UE, as shown in FIG. 6, including:
  • the first communication unit 61 initiates an access procedure to the second network, where the information sent in the access procedure carries at least the first indication information.
  • the first indication information may be first built and then broken indication information.
  • the UE further includes:
  • the first processing unit 62 is in the single registration mode before initiating the access procedure.
  • the UE Before the UE initiates an access procedure to the second network, the UE is in a single registration mode.
  • the single registration mode refer to FIG. 2.
  • the current UE only establishes a connection with one of the two networks, that is, a single registration SR mode; the two networks may be 5GS and EPS. Network.
  • the second indication information sent by the network side is received, where the second indication information is used to indicate that the UE accesses the second network, and carries the first indication information.
  • the network side may send the second indication information to the UE, and the indication information also indicates that the UE needs to carry the indication information of the first build and the break during the access process.
  • the first communication unit 61 receives the second indication information sent by the network side through the NAS message or the AS layer message.
  • the first communication unit 61 sends a location update request message to the first network, where the location update request message carries the GUTI applied to the first network and/or The GUTI sent by the second network to the UE.
  • the GUTI applied to the first network is obtained by mapping the second network GUTI.
  • a process of establishing a second connection with the second network is initiated by the service request process. That is to say, the related information of the second network is first acquired, and then the connection with the second network is established based on the related information.
  • the first communication unit 61 is in the dual registration mode, initiates an access procedure to the second network, and maintains a connection with the first network.
  • the dual registration mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • DR mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • both the 5GS and the EPS are simultaneously The networks remain connected.
  • the first processing unit 62 after the second network completes switching the first connection to the second connection, releases the connection with the first network and returns to the single registration mode. For example, referring to FIG. 2, after completing the connection with the second network, the UE establishes a connection with the second network, that is, the EPS in the figure, and releases the connection with the 5GS; at this time, the UE is in the single registration (SR) mode.
  • SR single registration
  • the UE before the UE moves out of the first network coverage edge in the SR mode, the UE initiates an access procedure in the second network in the DR mode, and establishes a PDN Connection corresponding to the PDU Session being used in the first network. After the PDN Connection is established and the handover of the PDU Session to the PDN Connection is completed, the UE sends a NAS message to the first network side to release the RRC connection, and returns to the SR mode.
  • the first indication information is carried in the message, and the indication information is used to indicate that the UE is first constructed and then disconnected; Enables the UE to implement uninterrupted cross-system handover of the UE in conjunction with dual registration capabilities.
  • An embodiment of the present invention provides a second network device, as shown in FIG. 7, including:
  • the second communication unit 71 receives an access procedure initiated by the UE to the second network, where the information sent in the access procedure carries at least the first indication information.
  • the first indication information may be first built and then broken indication information.
  • the UE Before the UE initiates an access procedure to the second network, the UE is in a single registration mode.
  • the single registration mode refer to FIG. 2.
  • the current UE only establishes a connection with one of the two networks, that is, a single registration SR mode; the two networks may be 5GS and EPS. Network.
  • the second communication unit 71 receives the second indication information sent by the network side, where the second indication information is used to indicate that the UE accesses the second network, and carries the first indication information.
  • the network side may send the second indication information to the UE, and the indication information also indicates that the UE needs to carry the indication information of the first build and the break during the access process.
  • the UE sending the access procedure specifically: receiving a location update request message sent by the UE, where the location update request message carries the GUTI applied to the first network and/or the GUTI sent by the second network to the UE. .
  • the GUTI applied to the first network is obtained by mapping the second network GUTI.
  • the second communication unit 71 after completing the location update process, initiates a process of establishing a second connection with the second network by using the service request process according to the acquired context. That is to say, the related information of the second network is first acquired, and then the connection with the second network is established based on the related information.
  • the UE then enters the dual registration mode, initiates an access procedure to the second network, and maintains a connection with the first network.
  • the dual registration mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • DR mode can be understood as a mode in which the UE can simultaneously connect with the first network and the second network.
  • both the 5GS and the EPS are simultaneously The networks remain connected.
  • the UE After the second network completes switching the first connection to the second connection, releasing the connection with the first network, and the UE returns to the single registration mode. For example, referring to FIG. 2, after completing the connection with the second network, the UE establishes a connection with the second network, that is, the EPS in the figure, and releases the connection with the 5GS; at this time, the UE is in the single registration (SR) mode.
  • SR single registration
  • the UE before the UE moves out of the first network coverage edge in the SR mode, the UE initiates an access procedure in the second network in the DR mode, and establishes a PDN Connection corresponding to the PDU Session being used in the first network. After the PDN Connection is established and the handover of the PDU Session to the PDN Connection is completed, the UE sends a NAS message to the first network side to release the RRC connection, and returns to the SR mode.
  • the second communication unit 71 sends a third request message to the third network device, where the first request information is carried in the connection request, where the third network device may be an AMF, and the third request message is used to obtain the third Context information used on the second network mapped by the UE on the device, and keeping the context of the UE on the third network device still in a valid state on the first network; and the third request message may be Context request; as shown in Figure 3, including:
  • the second communication unit 71 sends a setup session request message to the fourth network device, where the setup session request message carries the first indication information, where the setup session request message is used to enable the fourth network device to be in the second network. Binding a contextual correspondence relationship with the first network, and allocating the same network address as the first connection in the first network; after receiving the establishment session response information, sending an update location processing message to the fifth network device, maintaining The UE has a valid context in both the first network and the second network;
  • the UE In the update location processing message, the UE is in the dual registration mode, so that the fifth network device does not trigger the release address of the UE in the first network; wherein the fourth network device may be an HSS;
  • the method may include: the AMF sends a create session request to the PGW; the PGW receives the indication message, performs a Modify session request, and adjusts a session response, and can bind the EPS SM.
  • the PGW receives the indication message, performs a Modify session request, and adjusts a session response, and can bind the EPS SM.
  • the user plane establishes the PDN Connection, it assigns the same IP address as the corresponding PDU Session; then sends a session establishment response (Create session response) to the AMF; AMF and HSS
  • the side performs an update location process, where the message in the interaction indicates that the UE is in the DR (Double Registration) mode, so that the UDM does not trigger the cancel location of the 5GS, that is, does not trigger the 5GS system to perform the release process.
  • DR Double Registration
  • the MME indicates that it is in the DR mode in the Update location request message, so that the HSS does not trigger the cancel location behavior on the 5GS, that is, the valid MM and SM contexts are still maintained on the 5GS and the EPS.
  • the UE is in the DR mode, and the network side 5GS and the EPS have both the activated MM context (MM context); the AMF sends the TAU reception accept to the UE; after the TAU is executed, the UE or the PGW initiates the dedicated setup, the PDN connection and the PDU session. Sessions can share the same IP address and can be duplicated.
  • MM context the activated MM context
  • the UE or the network side initiates the establishment of the PDN connection according to the SM context obtained in the TAU process. If the UE initiates, it is the Service request process.
  • the second network device further includes:
  • the second processing unit 72 releases the connection with the UE after completing the handover of the first connection to the second connection;
  • the second communication unit receives a release message sent by the UE in the first network
  • the second processing unit disconnects the connection between the UE and the first network.
  • the second communication unit receives a release message sent by the UE in the first network, and disconnects the connection between the UE and the first network;
  • the first indication information is carried in the message, and the indication information is used to indicate that the UE is first constructed and then disconnected; Enables the UE to implement uninterrupted cross-system handover of the UE in conjunction with dual registration capabilities.
  • the embodiment further provides a method for switching, which is applied to a first network device, where the method includes:
  • the first network device when the first network device triggers the process of causing the second network device to perform the connection release with the first network according to the message sent by the UE, the first network device may request the second network device to carry therein. First build and then break the news.
  • a first network device including:
  • the third communication unit sends the first request information to the second network device, where the first request information carries at least the first indication information.
  • the embodiment of the present invention further provides a hardware component architecture of the user equipment or the receiver device.
  • the method includes at least one processor 81, a memory 82, and at least one network interface 83.
  • the various components are coupled together by a bus system 84.
  • bus system 84 is used to implement connection communication between these components.
  • bus system 84 includes a power bus, a control bus, and a status signal bus.
  • various buses are labeled as bus system 84 in FIG.
  • the memory 82 in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • memory 82 stores elements, executable modules or data structures, or a subset thereof, or their extension set:
  • the processor 81 is configured to be able to process the method steps of the foregoing first or second embodiment, and details are not described herein.
  • a computer storage medium is provided by the embodiment of the present invention.
  • the computer storage medium stores computer executable instructions. When the computer executable instructions are executed, the method steps of the first embodiment or the second embodiment are implemented.
  • Embodiments of the Invention may 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 standalone product. Based on such understanding, 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.
  • embodiments of the invention are not limited to any specific combination of hardware and software.

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Abstract

本发明公开了一种切换的方法、用户设备(UE)、网络设备及计算机存储介质,其中方法包括:所述UE向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。

Description

切换的方法、用户设备、网络设备及计算机存储介质 技术领域
本发明涉及信息处理技术领域,尤其涉及一种切换的方法、用户设备(UE)、网络设备及计算机存储介质。
背景技术
在5G时代,NG-RAN可以包括gNB和eNB同时或分别接入5GC核心网的场景,对于NR基站来讲,向AMF发送的切换请求消息是一样的,当发来的消息中的Target id是eNB id且该eNB既接入5GC又接入EPC时,AMF目前无法判断是否进行RAT切换(5GC不变,基站接入从NR变成eNB)还是System切换(5GC变成EPC)。
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的方法、用户设备(UE)、网络设备及计算机存储介质。
本发明实施例提供一种切换的方法,应用于用户设备UE,所述方法包括:
所述UE向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
本发明实施例提供一种切换的方法,应用于第二网络设备,所述方法包括:
获取第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
本发明实施例提供一种切换的方法,应用于第一网络设备,所述方法包括:
向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
本发明实施例提供一种UE,包括:
第一通信单元,向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
本发明实施例提供一种第二网络设备,包括:
第二通信单元,获取第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
本发明实施例提供一种第一网络设备,包括:
第三通信单元,向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
本发明实施例提供的一种用户设备UE,包括:处理器和用于存储能够在处理器上运行的计算机程序的存储器,
其中,所述处理器用于运行所述计算机程序时,执行前述方法的步骤。
本发明实施例提供的一种网络设备,包括:处理器和用于存储能够在处理器上运行的计算机程序的存储器,
其中,所述处理器用于运行所述计算机程序时,执行前述方法的步骤。
本发明实施例提供的一种计算机存储介质,所述计算机存储介质存储有计算机可执行指令,所述计算机可执行指令被执行时实现前述方法步骤。
本发明实施例的技术方案,就能够在UE在向第二网络发起接入流程的时候,在其消息中携带第一指示信息,通过该指示信息指示UE先建后断的处理;如此,就能够使得UE能够结合双注册能力实现UE的无间断跨系统切换。
附图说明
图1为本发明实施例提供的一种切换的方法流程示意图1;
图2为一种双网络切换结构示意图;
图3为本发明实施例提供的一种切换的方法流程示意图2;
图4为一种网络结构示意图;
图5为一种切换流程示意图;
图6为本发明实施例用户设备组成结构示意图;
图7为本发明实施例网络设备组成结构示意图;
图8为本发明实施例的一种硬件架构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容,下面结合附图对本发明实施例的实现进行详细阐述,所附附图仅供参考说明之用,并非用来限定本发明实施例。
实施例一、
本发明实施例提供了一种切换的方法,应用于用户设备(UE),包括:
所述UE向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
其中,所述第一指示信息可以为先建后断指示信息。
具体的,本实施例提供的方法参见图1,包括:
步骤101:所述UE处于单注册模式;
所述UE向第二网络发起接入流程之前,所述UE处于单注册模式,与第一网络建立连接。其中,所述单注册模式,可以参见图2,如图中所述当前UE仅与两个网络中的一个网络建立连接,即单注册SR模式;所述两个网络,可以为5GS和EPS两个网络。
然后,接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
也就是说,当发起接入流程之后,网络侧可以向UE发送第二指示信息,在该指示信息中也会指示UE在接入的过程中需要携带先建后断的指示信息。
所述接收网络侧发来的第二指示信息,包括:接收网络侧通过NAS消息、或AS层消息发来的第二指示信息。
进一步地,关于向网络侧发送接入流程,具体的:向第一网络发送位置更新请求消息,在所述位置更新请求消息中携带UE由第二网络GUTI映射出来的应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。也就是说,首先获取到第二网络的相关信息,然后再基于该相关信息建立与第二网络之间的连接。
步骤102:UE处于双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
其中,双注册模式(DR模式)可以理解为UE能够同时与第一网络以及第二网络进行连接的模式,比如,参见图2中,当UE处于双注册模式的时候,同时与5GS以及EPS两个网络保持连接。
步骤103:当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且所述UE返回单注册模式。比如,参见图2,当与第二网络完成连接之后,UE与第二网络也就是图中的EPS建立连接,并且释放与5GS之间的连接;此时,UE处于单注册(SR)模式。
本实施例提供的方案,UE在SR模式下当移动出第一网络覆盖边缘之前,发起DR模式下在第二网络的接入流程,建立第一网络中正在使用的PDU Session对应的PDN Connection,当建立了PDN Connection并完成PDU Session到PDN Connection的切换后,UE向第一网络侧发送NAS消息释放RRC连接,回到SR模式。
下面结合图3,对本实施例提供的切换的方法进一步进行说明:
步骤0:UE在5GS上完成注册,在connected(连接)状态下正在进行数据业务;
步骤1:网络侧5G-RAN决定触发切换,该切换为“Make before break”(先建后断)模式;5G-RAN向UE侧发送指示消息要求(可能是NAS消息或RRC Reconfig消息)指示UE执行TAU位置更新流程,并携带“Make before break”;
步骤2:UE向EPS的MME发送TAU Request(TAU请求)消息,标识“Make before break”,并且带有从5G-GUTI映射得到的4G-GUTI。
这里,需要进一步说明的是,本实施例给出的流程示意图虽然给出的步骤1-步骤2的处理流程,但是实际处理的时候,并不一定先执行步骤1再执行步骤2,并且可以不执行步骤1;也就是说,可以存在一种处理方式,直接从步骤2开始执行后续流程,而不需要步骤1,即不需要网络侧向UE发起指示来触发UE进行处理,UE可以自发的直接从步骤2开始执行。
基于上述描述,如果从步骤2开始执行后续操作(也就是不执行步骤1的情况),那么UE侧的触发或者处理条件可以包括:根据预先配置的门限值触发执行步骤2,或者,还可以为根据预先配置的时间等条件确定触发执行步骤2,这里不进行穷举。
步骤3:执行跨系统5GS至EPS的TAU流程。MME向AMF发送的 context request(上下文请求),其中携带标识“Make before break”,AMF据此发起图5流程,同时保持5GS侧上下文的active状态;
步骤4-8:执行图5中的Step-5到13,这其中需要携带标识“Make before break”的消息如图2中所示,具体的:AMF向PGW发送create session request(创建会话请求);PGW收到该指示的消息后进行调整会话请求(Modify session request)以及调整会话响应(Modify session response),能够绑定EPS SM上下文与对应的5GS SM上下文间的对应关系,后续在用户面建立PDN Connection时,为其分配与对应的PDU Session一样的IP地址;然后向AMF发送会话建立响应(Create session response);AMF与HSS侧进行update location(更新位置)处理,其中交互的消息中指示UE为DR(双注册)模式,从而使UDM不触发5GS的cancel location,也就是不触发5GS系统进行释放处理。
MME在Update location request消息中指示其为DR模式,这样HSS不会触发在5GS上的cancel location行为,即仍然保持5GS和EPS上同时有有效的MM和SM上下文
步骤9:此时UE处于DR模式,网络侧5GS和EPS上同时具有激活的MM context(MM上下文);可选的,还可以包括:PDN connection和PDU session可以共享同一个IP地址,进行duplication复制传输。
步骤10:AMF向UE发送TAU接收accept;执行完TAU后,UE或PGW发起专载建立,也就是立刻根据TAU流程中得到的SM上下文,UE或网络侧发起PDN连接的建立。若UE发起,则为Service request流程
步骤11和11b为二选一:UE向5GS发送deregistration消息断开原链接;或者,PGW SMF/UPF执行路由切换(path switch),把所有的数据从PDU会话session转移到对应的PDN连接connection上承载。
前述5GS以及EPS的架构,如图4所示,NG-RAN可以包括gNB和eNB同时或分别接入5GC核心网的场景,对于NR基站来讲,向AMF发送的Handover Require(图5中的步骤1)的消息是一样的,当发来的消息中的Target id是eNB id且该eNB既接入5GC又接入EPC时,AMF目前无法判断是否进行RAT切换(5GC不变,基站接入从NR变成eNB)还是System切换(5GC变成EPC)。图5中示意出单注册的一种处理流程,其中步骤1-3由UE通过eNB向MME发送TAU请求;即若UE处于空闲状态,则UE 向目标核心网MME发送TAU Request;步骤4-8由MME负责向原核心网获得相关的上下文信息,并完成鉴权以及安全性处理等操作;步骤9-16,,完成在目标核心网的位置更新流程。但是,上述现有技术中的方案流程仅支持单注册。
可见,通过采用上述方案,就能够在UE在向第二网络发起接入流程的时候,在其消息中携带第一指示信息,通过该指示信息指示UE先建后断的处理;如此,就能够使得UE能够结合双注册能力实现UE的无间断跨系统切换。
实施例二、
本发明实施例提供了一种切换的方法,应用于第二网络设备,包括:
获取第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
其获取第一请求信息的方式,可以包括:
接收所述UE向第二网络发起的接入流程,通过所述接入流程获取第一请求信息;其中,在接入流程中发送的信息中至少携带第一指示信息;
或者,还可以为接收第一网络设备发来的第一请求信息。
其中,所述第一指示信息可以为先建后断指示信息。
所述UE向第二网络发起接入流程之前,所述UE处于单注册模式。其中,所述单注册模式,可以参见图2,如图中所述当前UE仅与两个网络中的一个网络建立连接,即单注册SR模式;所述两个网络,可以为5GS和EPS两个网络。
然后,接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
也就是说,当发起接入流程之后,网络侧可以向UE发送第二指示信息,在该指示信息中也会指示UE在接入的过程中需要携带先建后断的指示信息。
进一步地,关于UE发送接入流程,具体的:接收UE发来的位置更新请求消息,在所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。也就是说,首先获取到第二网络的相关信息,然后再基于该相关信息建立与第二网络之间的连接。
然后UE处于双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
其中,双注册模式(DR模式)可以理解为UE能够同时与第一网络以及第二网络进行连接的模式,比如,参见图2中,当UE处于双注册模式的时候,同时与5GS以及EPS两个网络保持连接。
当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且所述UE返回单注册模式。比如,参见图2,当与第二网络完成连接之后,UE与第二网络也就是图中的EPS建立连接,并且释放与5GS之间的连接;此时,UE处于单注册(SR)模式。
本实施例提供的方案,UE在SR模式下当移动出第一网络覆盖边缘之前,发起DR模式下在第二网络的接入流程,建立第一网络中正在使用的PDU Session对应的PDN Connection,当建立了PDN Connection并完成PDU Session到PDN Connection的切换后,UE向第一网络侧发送NAS消息释放RRC连接,回到SR模式。
下面结合图3,对本实施例提供的切换的方法进一步进行说明:
步骤0:UE在5GS上完成注册,在connected(连接)状态下正在进行数据业务;
步骤1:网络侧5G-RAN决定触发切换,该切换为“Make before break”(先建后断)模式;5G-RAN向UE侧发送指示消息要求(可能是NAS消息或RRC Reconfig消息)指示UE执行TAU位置更新流程,并携带“Make before break”;
步骤2:UE向EPS的MME发送TAU Request(TAU请求)消息,标识“Make before break”,并且带有从5G-GUTI映射得到的4G-GUTI;
这里,需要进一步说明的是,本实施例给出的流程示意图虽然给出的步骤1-步骤2的处理流程,但是实际处理的时候,并不一定先执行步骤1再执行步骤2,并且可以不执行步骤1;也就是说,可以存在一种处理方式,直接从步骤2开始执行后续流程,而不需要步骤1,即不需要网络侧向UE发起指示来触发UE进行处理,UE可以自发的直接从步骤2开始执行。
基于上述描述,如果从步骤2开始执行后续操作(也就是不执行步骤1的情况),那么UE侧的触发或者处理条件可以包括:根据预先配置的门限值触发执行步骤2,或者,还可以为根据预先配置的时间等条件确定触发执行步骤2,这里不进行穷举。
步骤3:向第三网络设备发送第三请求消息,在所述连接请求中携带所述第一指示信息;其中,第三网络设备可以为AMF;第三请求消息用于获取第三设备上所述UE的映射出来的在第二网络上使用的上下文信息,并且保持所述第三网络设备上所述UE的上下文仍然在第一网络上处于有效状态;并且第三请求消息可以为上下文请求;具体的如图3所示,包括:
步骤3:执行跨系统5GS至EPS的TAU流程。MME向AMF发送的context request(上下文请求),其中携带标识“Make before break”,AMF据此发起图5流程,同时保持5GS侧上下文的active状态;
步骤4-8:向第四网络设备发送建立会话请求消息,在所述建立会话请求消息中携带第一指示信息;所述建立会话请求消息用于使得第四网络设备能够在第二网络中绑定与第一网络之间的上下文对应关系,并分配与第一网络中的第一连接相同的网络地址;在接收到建立会话响应信息之后,向第五网络设备发送更新位置处理消息,保持所述UE在第一网络以及第二网络中同时具备有效的上下文;
其中,在所述更新位置处理消息中指示所述UE处于双注册模式,以使得第五网络设备不触发所述UE在第一网络中的释放地址;其中第四网络设备可以为HSS;
具体的可以包括:
执行图5中的Step-5到13,AMF向PGW发送create session request(创建会话请求);PGW收到该指示的消息后进行调整会话请求(Modify session request)以及调整会话响应(Modify session response),能够绑定EPS SM上下文与对应的5GS SM上下文间的对应关系,后续在用户面建立PDN Connection时,为其分配与对应的PDU Session一样的IP地址;然后向AMF发送会话建立响应(Create session response);AMF与HSS侧进行update location(更新位置)处理,其中交互的消息中指示UE为DR(双注册)模式,从而使UDM不触发5GS的cancel location,也就是不触发5GS系统进行释放处理。
由于接收到了“Make before break”指示,MME在Update location request消息中指示其为DR模式,这样HSS不会触发在5GS上的cancel location行为,即仍然保持5GS和EPS上同时有有效的MM和SM上下文
步骤9:此时UE处于DR模式,网络侧5GS和EPS上同时具有激活的MM context(MM上下文);可选的,还可以包括:PDN connection和PDU session可以共享同一个IP地址,进行duplication复制传输。
步骤10:AMF向UE发送TAU接收accept;执行完TAU后,UE或PGW发起专载建立,PDN connection和PDU会话session可共用同一IP地址,可以进行duplicate(复制)传输;
也就是立刻根据TAU流程中得到的SM上下文,UE或网络侧发起PDN连接的建立。若UE发起,则为Service request流程
最后,当完成将第一连接切换至第二连接后,释放与所述UE之间的连接;
具体为可以为:
接收所述UE发来的在第一网络中的释放消息,断开所述UE与第一网络之间的连接;或者,接收所述UE发来的在第一网络中的释放消息,断开所述UE与第一网络之间的连接;
比如,参见图中,步骤11和11b为二选一:UE向5GS发送deregistration消息断开原链接;或者,PGW SMF/UPF执行路由切换(path switch),把所有的数据从PDU会话session转移到对应的PDN连接connection上承载。
前述5GS以及EPS的架构,如图4所示,NG-RAN可以包括gNB和eNB同时或分别接入5GC核心网的场景,对于NR基站来讲,向AMF发送的Handover Require(图5中的步骤1)的消息是一样的,当发来的消息中的Target id是eNB id且该eNB既接入5GC又接入EPC时,AMF目前无法判断是否进行RAT切换(5GC不变,基站接入从NR变成eNB)还是System切换(5GC变成EPC)。图5中示意出单注册的一种处理流程,其中步骤1-3由UE通过eNB向MME发送TAU请求;即若UE处于空闲状态,则UE向目标核心网MME发送TAU Request;步骤4-8由MME负责向原核心网获得相关的上下文信息,并完成鉴权以及安全性处理等操作;步骤9-16,,完成在目标核心网的位置更新流程。但是,上述现有技术中的方案流程仅支持单注册。
可见,通过采用上述方案,就能够在UE在向第二网络发起接入流程的时候,在其消息中携带第一指示信息,通过该指示信息指示UE先建后断的处理;如此,就能够使得UE能够结合双注册能力实现UE的无间断跨系统切换。
实施例三、
本发明实施例提供了一种UE,如图6所示,包括:
第一通信单元61,向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
其中,所述第一指示信息可以为先建后断指示信息。
具体的,所述UE还包括:
第一处理单元62,发起接入流程之前,处于单注册模式。
所述UE向第二网络发起接入流程之前,所述UE处于单注册模式。其中,所述单注册模式,可以参见图2,如图中所述当前UE仅与两个网络中的一个网络建立连接,即单注册SR模式;所述两个网络,可以为5GS和EPS两个网络。
然后,接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
也就是说,当发起接入流程之后,网络侧可以向UE发送第二指示信息,在该指示信息中也会指示UE在接入的过程中需要携带先建后断的指示信息。所述第一通信单元61,接收网络侧通过NAS消息、或AS层消息发来的第二指示信息。
进一步地,关于向网络侧发送接入流程,具体的:第一通信单元61,向第一网络发送位置更新请求消息,在所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。也就是说,首先获取到第二网络的相关信息,然后再基于该相关信息建立与第二网络之间的连接。
第一通信单元61,处于双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
其中,双注册模式(DR模式)可以理解为UE能够同时与第一网络以及第二网络进行连接的模式,比如,参见图2中,当UE处于双注册模式的时候,同时与5GS以及EPS两个网络保持连接。
第一处理单元62,当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且返回单注册模式。比如,参见图2,当与第二网络完成连接之后,UE与第二网络也就是图中的EPS建立连接,并且释放与5GS之间的连接;此时,UE处于单注册(SR)模式。
本实施例提供的方案,UE在SR模式下当移动出第一网络覆盖边缘之前,发起DR模式下在第二网络的接入流程,建立第一网络中正在使用的PDU Session对应的PDN Connection,当建立了PDN Connection并完成PDU Session到PDN Connection的切换后,UE向第一网络侧发送NAS消息释放RRC连接,回到SR模式。
可见,通过采用上述方案,就能够在UE在向第二网络发起接入流程的时候,在其消息中携带第一指示信息,通过该指示信息指示UE先建后断的处理;如此,就能够使得UE能够结合双注册能力实现UE的无间断跨系统切换。
实施例四、
本发明实施例提供了一种第二网络设备,如图7所示,包括:
第二通信单元71,接收所述UE向第二网络发起的接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
其中,所述第一指示信息可以为先建后断指示信息。
所述UE向第二网络发起接入流程之前,所述UE处于单注册模式。其中,所述单注册模式,可以参见图2,如图中所述当前UE仅与两个网络中的一个网络建立连接,即单注册SR模式;所述两个网络,可以为5GS和EPS两个网络。
第二通信单元71,接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
也就是说,当发起接入流程之后,网络侧可以向UE发送第二指示信息,在该指示信息中也会指示UE在接入的过程中需要携带先建后断的指示信息。
进一步地,关于UE发送接入流程,具体的:接收UE发来的位置更新请求消息,在所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
第二通信单元71,完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。也就是说,首先获取到第二网络的相关信息,然后再基于该相关信息建立与第二网络之间的连接。
然后UE处于双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
其中,双注册模式(DR模式)可以理解为UE能够同时与第一网络以及第二网络进行连接的模式,比如,参见图2中,当UE处于双注册模式的时候,同时与5GS以及EPS两个网络保持连接。
当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且所述UE返回单注册模式。比如,参见图2,当与第二网络完成连接之后,UE与第二网络也就是图中的EPS建立连接,并且释放与5GS之间的连接;此时,UE处于单注册(SR)模式。
本实施例提供的方案,UE在SR模式下当移动出第一网络覆盖边缘之前,发起DR模式下在第二网络的接入流程,建立第一网络中正在使用的PDU Session对应的PDN Connection,当建立了PDN Connection并完成PDU Session到PDN Connection的切换后,UE向第一网络侧发送NAS消息释放RRC连接,回到SR模式。
第二通信单元71,向第三网络设备发送第三请求消息,在所述连接请求中携带所述第一指示信息;其中,第三网络设备可以为AMF;第三请求消息用于获取第三设备上所述UE的映射出来的在第二网络上使用的上下文信息,并且保持所述第三网络设备上所述UE的上下文仍然在第一网络上处于有效状态;并且第三请求消息可以为上下文请求;具体的如图3所示,包括:
MME向AMF发送的context request(上下文请求),其中携带标识“Make before break”,AMF据此发起图3流程,同时保持5GS侧上下文的active状态;
第二通信单元71,向第四网络设备发送建立会话请求消息,在所述建立会话请求消息中携带第一指示信息;所述建立会话请求消息用于使得第四网络设备能够在第二网络中绑定与第一网络之间的上下文对应关系,并分配与第一网络中的第一连接相同的网络地址;在接收到建立会话响应信息之后,向第五网络设备发送更新位置处理消息,保持所述UE在第一网络以及第二网络中同时具备有效的上下文;
其中,在所述更新位置处理消息中指示所述UE处于双注册模式,以使得第五网络设备不触发所述UE在第一网络中的释放地址;其中第四网络设备可以为HSS;
具体的可以包括:AMF向PGW发送create session request(创建会话请求);PGW收到该指示的消息后进行调整会话请求(Modify session request)以及调整会话响应(Modify session response),能够绑定EPS SM上下文与对应的5GS SM上下文间的对应关系,后续在用户面建立PDN Connection时,为其分配与对应的PDU Session一样的IP地址;然后向AMF发送会话建立响应(Create session response);AMF与HSS侧进行update location(更新位置)处理,其中交互的消息中指示UE为DR(双注册)模式,从而使UDM不触发5GS的cancel location,也就是不触发5GS系统进行释放处理。
MME在Update location request消息中指示其为DR模式,这样HSS不会触发在5GS上的cancel location行为,即仍然保持5GS和EPS上同时有有效的MM和SM上下文
此时UE处于DR模式,网络侧5GS和EPS上同时具有激活的MM context(MM上下文);AMF向UE发送TAU接收accept;执行完TAU后,UE或PGW发起专载建立,PDN connection和PDU会话session可共用同一IP地址,可以进行duplicate(复制)传输;
也就是立刻根据TAU流程中得到的SM上下文,UE或网络侧发起PDN连接的建立。若UE发起,则为Service request流程
所述第二网络设备还包括:
第二处理单元72,当完成将第一连接切换至第二连接后,释放与所述UE之间的连接;
具体为可以为:
所述第二通信单元,接收所述UE发来的在第一网络中的释放消息;
所述第二处理单元,断开所述UE与第一网络之间的连接。
或者,所述第二通信单元,接收所述UE发来的在第一网络中的释放消息,断开所述UE与第一网络之间的连接;
可见,通过采用上述方案,就能够在UE在向第二网络发起接入流程的时候,在其消息中携带第一指示信息,通过该指示信息指示UE先建后断的处理;如此,就能够使得UE能够结合双注册能力实现UE的无间断跨系统切换。
实施例五、
在前述实施例的基础上,本实施例还提供一种切换的方法,应用于第一网络设备,所述方法包括:
向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
也就是说,当第一网络设备根据UE发送的消息触发需要使得第二网络设备进行与第一网络的连接释放的处理的时候,第一网络设备可以向第二网络设备进行请求,在其中携带先建后断的消息。
相应的,还可以提供一种第一网络设备,包括:
第三通信单元,向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
本发明实施例还提供了一种用户设备、或接收方设备的硬件组成架构,如图8所示,包括:至少一个处理器81、存储器82、至少一个网络接口83。各个组件通过总线系统84耦合在一起。可理解,总线系统84用于实现这些组件之间的连接通信。总线系统84除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图8中将各种总线都标为总线系统84。
可以理解,本发明实施例中的存储器82可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。
在一些实施方式中,存储器82存储了如下的元素,可执行模块或者数据结构,或者他们的子集,或者他们的扩展集:
操作系统821和应用程序822。
其中,所述处理器81配置为:能够处理前述实施例一或二的方法步骤,这里不再进行赘述。
本发明实施例提供的一种计算机存储介质,所述计算机存储介质存储有计算机可执行指令,所述计算机可执行指令被执行时实施前述实施例一或二的方法步骤。
本发明实施例上述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。
尽管为示例目的,已经公开了本发明的优选实施例,本领域的技术人员将意识到各种改进、增加和取代也是可能的,因此,本发明的范围应当不限于上述实施例。

Claims (47)

  1. 一种切换的方法,应用于用户设备UE,所述方法包括:
    所述UE向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
  2. 根据权利要求1所述的方法,其中,所述向第二网络发起接入流程之前,所述方法还包括:
    所述UE处于单注册模式。
  3. 根据权利要求1所述的方法,其中,所述方法还包括:
    接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
  4. 根据权利要求3所述的方法,其中,所述接收网络侧发来的第二指示信息,包括:
    接收网络侧通过NAS消息、或AS层消息发来的第二指示信息。
  5. 根据权利要求1所述的方法,其中,所述方法还包括:
    向第一网络发送位置更新请求消息,在所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
  6. 根据权利要求5所述的方法,其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
  7. 根据权利要求5所述的方法,其中,所述方法还包括:
    完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。
  8. 根据权利要求1所述的方法,其中,所述向第二网络发起接入流程,包括:
    UE处于双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
  9. 根据权利要求1所述的方法,其中,所述方法还包括:
    当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且所述UE返回单注册模式。
  10. 一种切换的方法,应用于第二网络设备,所述方法包括:
    获取第一请求信息;其中,所述第一请求信息中至少携带第一指示信 息。
  11. 根据权利要求10所述的方法,其中,所述获取第一请求信息,包括:
    接收所述UE向第二网络发起的接入流程,通过所述接入流程获取第一请求信息;其中,在接入流程中发送的信息中至少携带第一指示信息。
  12. 根据权利要求10所述的方法,其中,所述获取第一请求信息,包括:
    接收第一网络设备发来的第一请求信息。
  13. 根据权利要求11所述的方法,其中,所述方法还包括:
    接收UE发来的位置更新请求消息,所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
  14. 根据权利要求13所述的方法,其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
  15. 根据权利要求13所述的方法,其中,所述接收UE发来的位置更新请求消息之后,所述方法还包括:
    向第三网络设备发送第三请求消息,在所述第三请求消息中携带所述第一指示信息。
  16. 根据权利要求15所述的方法,其中,第三请求消息用于获取第三设备上所述UE的映射出来的在第二网络上使用的上下文信息,并且保持所述第三网络设备上所述UE的上下文仍然在第一网络上处于有效状态。
  17. 根据权利要求15所述的方法,其中,所述方法还包括:
    向第四网络设备发送建立会话请求消息,在所述建立会话请求消息中携带第一指示信息;所述建立会话请求消息用于使得第四网络设备能够在第二网络中绑定与第一网络之间的上下文对应关系,并分配与第一网络中的第一连接相同的网络地址。
  18. 根据权利要求17所述的方法,其中,所述方法还包括:
    在接收到建立会话响应信息之后,向第五网络设备发送更新位置处理消息,保持所述UE在第一网络以及第二网络中同时具备有效的上下文;
    其中,在所述更新位置处理消息中指示所述UE处于双注册模式,以使得第五网络设备不触发所述UE在第一网络中的释放地址。
  19. 根据权利要求18所述的方法,其中,所述方法还包括:
    当完成将第一连接切换至第二连接后,释放与所述UE之间的连接。
  20. 根据权利要求19所述的方法,其中,所述释放与所述UE之间的连接还包括:
    接收所述UE发来的在第一网络中的释放消息,断开所述UE与第一网络之间的连接。
  21. 根据权利要求19所述的方法,其中,所述释放与所述UE之间的连接还包括:
    向第四网络设备发起路由切换处理,将所述UE的数据有第一连接切换至第二连接,释放所述UE与第一网络的连接。
  22. 一种切换的方法,应用于第一网络设备,所述方法包括:
    向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
  23. 一种UE,包括:
    第一通信单元,向第二网络发起接入流程;其中,在接入流程中发送的信息中至少携带第一指示信息。
  24. 根据权利要求23所述的UE,其中,所述UE还包括:
    第一处理单元,发起接入流程之前,处于单注册模式。
  25. 根据权利要求23所述的UE,其中,所述第一通信单元,接收网络侧发来的第二指示信息,其中,所述第二指示信息用于指示所述UE接入第二网络,并携带第一指示信息。
  26. 根据权利要求25所述的UE,其中,所述第一通信单元,接收网络侧通过NAS消息、或AS层消息发来的第二指示信息。
  27. 根据权利要求23所述的UE,其中,所述第一通信单元,向第一网络发送位置更新请求消息,在所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
  28. 根据权利要求27所述的UE,其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
  29. 根据权利要求27所述的UE,其中,所述第一通信单元,完成位置更新处理之后,根据获取到的上下文,通过业务请求流程发起与第二网络发起第二连接的建立的处理。
  30. 根据权利要求23所述的UE,其中,所述第一通信单元,UE处于 双注册模式,向第二网络发起接入流程,并保持与第一网络的连接。
  31. 根据权利要求30所述的UE,其中,所述UE还包括:
    第一处理单元,当所述第二网络完成将第一连接换至所述第二连接后,释放与第一网络之间的连接、且返回单注册模式。
  32. 一种第二网络设备,包括:
    第二通信单元,获取第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
  33. 根据权利要求32所述的第二网络设备,其中,所述第二通信单元,接收所述UE向第二网络发起的接入流程,通过所述接入流程获取第一请求信息;其中,在接入流程中发送的信息中至少携带第一指示信息。
  34. 根据权利要求32所述的第二网络设备,其中,所述第二通信单元,接收第一网络设备发来的第一请求信息。
  35. 根据权利要求32所述的第二网络设备,其中,所述第二通信单元,接收UE发来的位置更新请求消息,所述位置更新请求消息中携带应用于第一网络的GUTI和/或第二网络发送给UE的GUTI。
  36. 根据权利要求35所述的第二网络设备,其中,所述应用于第一网络的GUTI是通过第二网络GUTI映射得到。
  37. 根据权利要求32所述的第二网络设备,其中,所述第二通信单元,向第三网络设备发送第三请求消息,在所述第三请求消息中携带所述第一指示信息。
  38. 根据权利要求37所述的第二网络设备,其中,第三请求消息用于获取第三设备上所述UE的映射出来的在第二网络上使用的上下文信息,并且保持所述第三网络设备上所述UE的上下文仍然在第一网络上处于有效状态。
  39. 根据权利要求37所述的第二网络设备,其中,所述第二通信单元,向第四网络设备发送建立会话请求消息,在所述建立会话请求消息中携带第一指示信息;所述建立会话请求消息用于使得第四网络设备能够在第二网络中绑定与第一网络之间的上下文对应关系,并分配与第一网络中的第一连接相同的网络地址。
  40. 根据权利要求39所述的第二网络设备,其中,所述第二通信单元,在接收到建立会话响应信息之后,向第五网络设备发送更新位置处理消息, 保持所述UE在第一网络以及第二网络中同时具备有效的上下文;
    其中,在所述更新位置处理消息中指示所述UE处于双注册模式,以使得第五网络设备不触发所述UE在第一网络中的释放地址。
  41. 根据权利要求40所述的第二网络设备,其中,所述第二网络设备还包括:
    第二处理单元,当完成将第一连接切换至第二连接后,释放与所述UE之间的连接。
  42. 根据权利要求41所述的第二网络设备,其中,所述第二通信单元,接收所述UE发来的在第一网络中的释放消息;
    所述第二处理单元,断开所述UE与第一网络之间的连接。
  43. 根据权利要求41所述的第二网络设备,其中,所述第二通信单元,向第四网络设备发起路由切换处理,将所述UE的数据有第一连接切换至第二连接,释放所述UE与第一网络的连接。
  44. 一种第一网络设备,包括:
    第三通信单元,向第二网络设备发送第一请求信息;其中,所述第一请求信息中至少携带第一指示信息。
  45. 一种UE,包括:处理器和用于存储能够在处理器上运行的计算机程序的存储器,
    其中,所述处理器用于运行所述计算机程序时,执行权利要求1-9任一项所述方法的步骤。
  46. 一种网络设备,包括:处理器和用于存储能够在处理器上运行的计算机程序的存储器,
    其中,所述处理器用于运行所述计算机程序时,执行权利要求10-22任一项所述方法的步骤。
  47. 一种计算机存储介质,所述计算机存储介质存储有计算机可执行指令,所述计算机可执行指令被执行时实现权利要求1-22任一项所述的方法步骤。
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