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WO2018191952A1 - Procédé de commutation de réseau, dispositif et système - Google Patents

Procédé de commutation de réseau, dispositif et système Download PDF

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Publication number
WO2018191952A1
WO2018191952A1 PCT/CN2017/081427 CN2017081427W WO2018191952A1 WO 2018191952 A1 WO2018191952 A1 WO 2018191952A1 CN 2017081427 W CN2017081427 W CN 2017081427W WO 2018191952 A1 WO2018191952 A1 WO 2018191952A1
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WO
WIPO (PCT)
Prior art keywords
message
base station
information
communication system
identifier
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
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PCT/CN2017/081427
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English (en)
Chinese (zh)
Inventor
金辉
欧阳国威
窦凤辉
何岳
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2017/081427 priority Critical patent/WO2018191952A1/fr
Priority to CN201780050062.5A priority patent/CN109565723B/zh
Publication of WO2018191952A1 publication Critical patent/WO2018191952A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a network switching method, apparatus, and system.
  • the core network of the 5G network and the core network of the 4G network and the 2G/3G network coexist, so there is a user equipment (User Equipment, UE) from 4G.
  • UE User Equipment
  • 4G legacy base stations Evolved UMTS Terrestrial Radio Access Network (E-UTRAN)
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • the UE can access the 5G network through Evolved E-UTRAN.
  • the UE can be switched from 4G to 5G, but the 4G base station in the handover process is the enhanced E-UTRAN, not the 4G traditional E-UTRAN, but not in the initial stage of the 5G network.
  • 4G E-UTRAN is enhanced, and there is a partially un-enhanced E-UTRAN.
  • the un-enhanced E-TURTAN considers the target base station to be a 4G base station and switches the UE to the 4G network, when the UE is never enhanced within 4G.
  • E-UTRAN After the E-UTRAN is switched to Evolved E-UTRAN, that is, when the Evolved E-UTRAN is in the connected state, how to switch between 4G and 5G within the Evolved E-UTRAN is an urgent problem to be solved.
  • the present application provides a network handover method, apparatus, and system to solve the problem of how to perform handover between 4G and 5G within the Evolved E-UTRAN when the Evolved E-UTRAN is in the connected state.
  • the present application provides a network handover method, including: after a UE monitors an SIB message sent by a base station, and learns that the base station supports the second communication system, the UE sends a first message to the base station, where the first message carries the first information, and the first message The information is used to indicate that the handover is performed in the base station, the UE receives the second message sent by the base station, the second message carries the second information used by the UE in the second communication system, and the UE accesses the second communication system by using the second information. Therefore, when the Evolved E-UTRAN is in the connected state, the UE performs handover between 4G and 5G within the Evolved E-UTRAN. When the UE moves between 4G and 5G, the continuity of the service can be ensured.
  • the version of the second communication system is higher than the first communication system.
  • the first message is used to request to switch from the first communication system to the second communication system, so that the base station sends a third message to the second core network element of the first communication system, in the third message. And carrying the identifier of the UE and the third information, where the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed in the base station.
  • the first message is used to request to switch from the first communication system to the second communication system, so that the base station sends a third message to the second core network element of the first communication system, in the third message.
  • the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the UE learns that the base station supports the second communication system, including:
  • the UE monitors the indication information carried in the system information sent by the base station, and learns that the base station supports the second communication system; or
  • the UE receives the indication information sent by the base station, and learns, according to the indication information, that the base station supports the second communication system.
  • the first message includes a fourth message sent by the UE to the first core network element, so that the base station sends a fourth message to the first core network element, where the fourth message carries the identifier of the UE.
  • the fourth information is used to indicate that the handover is performed in the base station, the fourth message is used for the UE to request location update, or the fourth message is used for the UE to request the mobile registration update.
  • the first message includes a fifth message sent by the UE to the second core network element, so that the base station sends a fifth message to the first core network element, where the fifth message carries the identifier of the UE.
  • the fifth information is used to indicate that the handover is performed in the base station, and the fifth message is used to request the location update by the UE.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the application provides a network handover method, including: receiving, by a base station, a first message sent by a first core network element of a second communication system, where the first message is used to request to switch the UE from the first communication system to the first
  • the first message carries the identifier of the UE and the first information, where the first information is used to indicate that the handover is performed in the base station
  • the base station determines, according to the first condition, the second information that is used by the UE in the second communication system, first The condition includes the identifier of the UE and the first information
  • the base station sends a second message to the UE, and the second message carries the second information.
  • the UE performs handover between 4G and 5G within the Evolved E-UTRAN.
  • the continuity of the service can be ensured.
  • the version of the second communication system is higher than the first communication system.
  • the base station before receiving the first message sent by the first core network element of the second communication system, the base station further includes: receiving, by the base station, a third message sent by the UE, where the third message is used to request the first communication The system switches to the second communication system; the base station sends a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the third information, and the fourth message is used to make the second core network The element learns to switch the UE from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed within the base station.
  • the base station before receiving the first message sent by the first core network element of the second communication system, the base station further includes: receiving, by the base station, a third message sent by the UE, where the third message is used to request the first communication The system switches to the second communication system; the base station sends a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the first information, and the fourth message is used to make the second core network The element learns to switch the UE from the first communication system to the second communication system.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the method before the base station sends the second message to the UE, the method further includes:
  • the base station saves the correspondence between the identifier of the UE and the second information; the base station sends the first message to the network element of the first core network a confirmation message; the base station receives the fifth message sent by the second core network element, and the fifth message carries the identifier of the UE, the base station obtains the second information according to the identifier and the corresponding relationship of the UE, and sends the second information to the UE; or, the base station And receiving, by the second core network element, a fifth message, where the fifth message carries the identifier of the UE and the protocol data unit PDU session context, and the base station obtains the second information according to the identifier and the corresponding relationship of the UE, and sends the second information to the UE. PDU session context.
  • the base station before receiving the first message sent by the first core network element of the second communication system, the base station further includes: the base station receiving the sixth message sent by the UE, where the sixth message includes the UE to the first core
  • the seventh message sent by the network element, the seventh message carries the identifier of the UE and the fourth information, and the fourth information is used to indicate that the handover is performed in the base station;
  • the base station sends a seventh message to the first core network element, where the seventh message is used for the UE to request location update, or the seventh message is used by the UE to request mobile registration update.
  • the base station before receiving the first message sent by the first core network element of the second communication system, the base station further includes: receiving, by the base station, an eighth message sent by the UE, where the eighth message includes the UE to the second core
  • the ninth message sent by the network element, the ninth message carries the identifier of the UE and the fourth information, and the fourth information is used to indicate that the handover is performed in the base station;
  • the base station sends a ninth message to the first core network element, and the ninth message is used by the UE to request tracking area update.
  • the first information further includes a PDU session context
  • the base station determines the second information used by the UE in the second communication system according to the first condition, where the base station obtains the UE in the first communication system according to the first condition.
  • the radio resource information the base station generates the second information based on the radio resource information of the first communication system and the PDU session context.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the present application provides a network switching method, including: a first core network element of a second communication system receives a third core network element sent by a second communication system, and is used to establish a protocol data unit for a user equipment UE. a second message of the PDU session, the second message carries a PDU context, the first core network element sends a first message to the base station, where the first message is used to request to switch the UE from the first communication system to the second communication system, the first message The identifier of the UE and the first information are carried in, where the first information is used to indicate that the handover is performed in the base station.
  • the UE performs handover between 4G and 5G within the Evolved E-UTRAN.
  • the continuity of the service can be ensured.
  • the first core network element before the first core network element receives the second message sent by the third core network element of the second communication system for establishing a PDU session for the UE, the first core network element further includes: the first core network element Receiving a third message sent by the second core network element of the first communication system, where the third message carries the identifier of the UE and the first information, where the first information is used to indicate that the handover is performed in the base station.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the third message is sent by the second core network element after receiving the fourth message sent by the base station, and the fourth message carries the first information and the identifier of the UE.
  • the third message is sent after the second core network element receives the fifth message sent by the UE, and the fifth message is used by the UE to request location update.
  • the method before the first core network element receives the second message sent by the third core network element, the method further includes: the first core network element receives the sixth message sent by the UE, and the sixth message is used.
  • the UE requests a location update, Or the sixth message is used by the UE to request a mobile registration update.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the application provides a user equipment, including: a processing module, configured to access a first communication system by using a base station, to learn that the base station supports a second communication system, and a sending module, configured to send a first message to the base station,
  • the first message carries the first information, where the first information is used to indicate that the handover is performed in the base station
  • the receiving module is configured to receive the second message sent by the base station
  • the second message is used to carry the second message that is used by the UE in the second communication system.
  • the information processing module is further configured to access the second communication system using the second information.
  • the UE performs handover between 4G and 5G within the Evolved E-UTRAN.
  • the continuity of the service can be ensured.
  • the version of the second communication system is higher than the first communication system.
  • the first message is used to request to switch from the first communication system to the second communication system, so that the base station sends a third message to the second core network element of the first communication system, in the third message. And carrying the identifier of the UE and the third information, where the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed in the base station.
  • the first message is used to request to switch from the first communication system to the second communication system, so that the base station sends a third message to the second core network element of the first communication system, in the third message. And carrying the identifier of the UE and the first information, where the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the processing module is specifically configured to:
  • the receiving module is further configured to receive the indication information sent by the base station, where the processing module is specifically configured to learn, according to the indication information, that the base station supports the second communication system.
  • the first message includes a fourth message sent by the UE to the first core network element, so that the base station sends a fourth message to the first core network element, where the fourth message carries the identifier of the UE.
  • the fourth information is used to indicate that the handover is performed in the base station, the fourth message is used for the UE to request location update, or the fourth message is used for the UE to request the mobile registration update.
  • the first message includes a fifth message sent by the UE to the second core network element, so that the base station sends a fifth message to the first core network element, where the fifth message carries the identifier of the UE.
  • the fifth information is used to indicate that the handover is performed in the base station, and the fifth message is used to request the location update by the UE.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the application provides a base station, including: a receiving module, configured to receive a first message sent by a first core network element of a second communications system, where the first message is used to request that the user equipment UE be from the first communications
  • the system switches to the second communication system, where the first message carries the identifier of the UE and the first information, the first information is used to indicate that the handover is performed in the base station, and the processing module is configured to determine, according to the first condition, that the UE is in the second communication system.
  • the second information used, the first condition includes The identifier of the UE and the first information
  • the sending module configured to send the second message to the UE, where the second message carries the second information.
  • the UE performs handover between 4G and 5G within the Evolved E-UTRAN.
  • the continuity of the service can be ensured.
  • the version of the second communication system is higher than the first communication system.
  • the receiving module is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive a third message sent by the UE, where the third message is used to request a communication system is switched to the second communication system; the sending module is further configured to: send a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the third information, where the fourth message is used The second core network element is informed that the UE is handed over from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed within the base station.
  • the receiving module is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive a third message sent by the UE, where the third message is used to request from the first The communication system switches to the second communication system;
  • the sending module is further configured to: send a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the first information, where the fourth message is used to learn the second core network element
  • the UE switches from the first communication system to the second communication system.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the processing module is further configured to: before the sending module sends the second message to the UE, save the correspondence between the identifier of the UE and the second information;
  • the sending module is further configured to send a confirmation message of the first message to the first core network element.
  • the receiving module is further configured to receive a fifth message sent by the second core network element, where the fifth message carries the identifier of the UE, where the sending module is further configured to obtain the second information according to the identifier and the corresponding relationship of the UE, and send the second information to the UE.
  • the receiving module is further configured to receive the fifth message sent by the second core network element, where the fifth message carries the identifier of the UE and the protocol data unit PDU session context, and the sending module is further configured to use the identifier and the corresponding relationship of the UE. Obtaining the second information and transmitting the second information and the PDU session context to the UE.
  • the receiving module is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive the sixth message sent by the UE, where the sixth message includes the UE.
  • the seventh message sent by a core network element the seventh message carries the identifier of the UE and the fourth information, the fourth information is used to indicate that the handover is performed in the base station, and the sending module is further configured to send the seventh message to the first core network element.
  • the message, the seventh message is used for the UE to request location update, or the seventh message is used for the UE to request mobile registration update.
  • the receiving module is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive an eighth message sent by the UE, where the eighth message includes the UE to the first
  • the ninth message sent by the network element of the second core network the ninth message carries the identifier of the UE and the fourth information, and the fourth information is used to indicate that the handover is performed in the base station;
  • the sending module is further configured to send a ninth message to the first core network element, where the ninth message is used by the UE to perform tracking area update.
  • the first information further includes a PDU session context
  • the processing module is specifically configured to: obtain, according to the first condition, radio resource information of the UE in the first communication system, and based on the radio resource information of the first communication system, The PDU session context generates second information.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the application provides a core network element, including:
  • a receiving module configured to receive a second message that is sent by the third core network element of the second communications system to establish a protocol data unit PDU session for the user equipment UE, the second message carries a PDU context, and the sending module is configured to send to the base station Sending a first message, the first message is used to request to switch the UE from the first communication system to the second communication system, where the first message carries the identifier of the UE and the first information, where the first information is used to indicate that the handover is performed in the base station. Therefore, when the Evolved E-UTRAN is in the connected state, the UE performs handover between 4G and 5G within the Evolved E-UTRAN. When the UE moves between 4G and 5G, the continuity of the service can be ensured.
  • the receiving module is further configured to: receive the second message of the first communication system before receiving the second message sent by the third core network element of the second communication system for establishing a PDU session for the UE.
  • the third message sent by the network element of the core network where the third message carries the identifier of the UE and the first information, where the first information is used to indicate that the handover is performed in the base station.
  • the identity and first information of the UE is carried by the source to the target transparent container.
  • the third message is sent by the second core network element after receiving the fourth message sent by the base station, and the fourth message carries the first information and the identifier of the UE.
  • the third message is sent after the second core network element receives the fifth message sent by the UE, and the fifth message is used by the UE to request location update.
  • the receiving module is further configured to: before receiving the second message sent by the third core network element, receive the sixth message sent by the UE, where the sixth message is used by the UE to request location update, or Six messages are used by the UE to request a mobile registration update.
  • the identifier of the UE is an identifier allocated by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the present application provides a communication system comprising the user equipment described in the fourth aspect and the possible design of the fourth aspect, and the base station described in the fifth aspect and the possible design of the fifth aspect.
  • the application provides a readable storage medium, where an execution instruction is stored, and when at least one processor of the network switching device executes the execution instruction, the network switching device performs the first aspect and the second aspect. Or the network switching method of the third aspect.
  • the application provides a program product, the program product comprising an execution instruction, the execution instruction being stored in a readable storage medium.
  • At least one processor of the network switching device can read the execution instruction from a readable storage medium, and the at least one processor executes the execution instruction such that the network switching device implements the network switching method of the first aspect, the second aspect, or the third aspect.
  • FIG. 1 is a schematic diagram of a network architecture provided by the present application.
  • FIG. 2 is a schematic diagram of an interaction process of Embodiment 1 of a network switching method provided by the present application;
  • FIG. 3 is a schematic diagram of an interaction process of a second embodiment of a network switching method according to the present application.
  • FIG. 4 is a schematic diagram of an interaction process of Embodiment 3 of a network switching method provided by the present application.
  • FIG. 5 is a schematic structural diagram of Embodiment 1 of a UE according to the present application.
  • Embodiment 1 of a base station is a schematic structural diagram of Embodiment 1 of a base station according to the present application.
  • Embodiment 7 is a schematic structural diagram of Embodiment 2 of a UE according to the present application.
  • FIG. 8 is a schematic structural diagram of Embodiment 2 of a base station according to the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access Wireless
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • the technical solution of the present application is mainly applied to a 4G communication system and a 5G communication system.
  • the network element involved is a base station (also referred to as an access network device) and a UE.
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • MME Mobile Management Entity
  • SGW Serving Gateway
  • UPF User Plane Function
  • PGW-C PDN Gateway-Control plane
  • SMF Session Management Function
  • PDN Gateway-User plane, PGW-U Policy and Charging Rules Function
  • PCRF Policy and Charging Rules Function
  • HSS Home Subscriber Server
  • UDM Unified Data Management
  • AMF Access and Mobility Management Function
  • E-UTRAN Evolved E-UTRAN
  • the network architecture of the present application includes a first communication system, a second communication system, and a UE, and the first communication system and the second communication system include a shared network element and a shared base station ("Evolved" E-UTRAN), and the second communication The version of the system is higher than the first communication system.
  • the first communication system is a 4G communication system
  • the second communication system is a 5G communication system.
  • the E-UTRAN is a 4G side base station, and the UE can access the 4G communication system through the base station; the “Evolved” E-UTRAN is an enhancement to the 4G side base station, and the UE can access the 5G communication system through the base station.
  • the MME is a 4G core network device, which is responsible for authentication, authorization, mobility management, and session management of the UE; the associated EPS bearer identifier of the UE in a 4G protocol data network (PDN) connection (Connection or Connectivity) (Linked) EPS Bearer ID, LBI) is assigned by this entity.
  • PDN protocol data network
  • LBI Linked EPS Bearer ID
  • the SGW is a 4G core network device (core network gateway), which is responsible for data forwarding, downlink data storage, and the like.
  • UPF+PGW-U is the core network equipment shared by 4G and 5G, that is, the core network equipment of 4G and 5G, including the functions of UPF and PGW-U.
  • the UPF is a user plane device of the 5G core network, and provides a user plane service for the PDU session of the UE; it is an interface gateway between the operator network and the external network.
  • the PGW-U is a user plane device of the 4G core network, and provides user plane services for the PDN connection of the UE; it is an interface gateway between the carrier network and the external network.
  • UPF+PGW-U can also be called PGW-U+UPF, as long as it is a device that includes UPF and PGW-U functions.
  • SMF+PGW-C is the core network equipment shared by 4G and 5G, that is, the core network equipment of 4G and 5G, including the functions of SMF and PGW-C.
  • the SMF is a control plane device of the 5G core network, and provides a control plane service for the PDU session of the UE; manages the 5G PDU session, manages the 5G QoS, and is responsible for allocating an IP address for the UE, and is responsible for selecting the UPF for the UE.
  • the PGW-C is a control plane device of the 4G core network, and provides user plane services for the PDN connection of the UE. It is responsible for allocating an IP address for the UE and establishing an EPS bearer for the UE.
  • SMF+PGW-C can also be called PGW-C+SMF, as long as it is a device that includes SMF and PGW-C functions.
  • PCF+PCRF is a core network device shared by 4G and 5G, that is, 4G and 5G core network devices, including PCF and PCRF.
  • the PCRF is a 4G core network device, and is responsible for generating a policy for a user to establish a data bearer.
  • PCF is a 5G core network device, similar to the PCRF function.
  • PCF+PCRF may also be referred to as PCRF+PCF, as long as it is a device containing PCF and PCRF functions.
  • UDM+HSS is a core network device shared by 4G and 5G, that is, 4G and 5G core network devices, including HSS and UDM.
  • the HSS is a 4G core network device and is used to store subscription data of the user.
  • the SDM is a 5G core network device and is used to store user subscription data.
  • UDM+HSS can also be called HSS+UDM, as long as it is a device that includes both HSS and UDM functions.
  • AMF is a 5G core network device, which is used to authenticate and authorize users and manage user mobility.
  • the Nx interface is an interface between the MME and the AMF, and the interface is optional.
  • the enhanced E-UTRAN determines that the UE needs to be switched from 4G to 5G according to the measurement report reported by the UE.
  • the enhanced E-UTRAN sends a handover request message to the 4G network element (Mobile Management Entity, MME for short), and carries the source to target transparent container (Source to Target Transparent Container) and the target 5G in the message.
  • the target 5G base station includes a base station defined by the 5G system dedicated to access the 5G core network, and Evolved E-UTRAN.
  • the MME determines the 5G core network element, the Access and Mobility Management Function (AMF), and sends a forward relocation request message to the AMF.
  • AMF Access and Mobility Management Function
  • the AMF determines a session management function (SSF) for providing a service to the UE according to the forward redirect request message, and sends a protocol data unit (PDU) session establishment request to the SMF.
  • SSF session management function
  • PDU protocol data unit
  • the packet data network (Packet Data Network abbreviation: PDN) connection (Connection or Connectivity) context (Context) is carried in the message.
  • the SMF determines the PDU session context used by the UE in 5G according to the PDN connection context.
  • the SMF sends a session creation request to the User Plane Function (UPF) gateway to establish a session for the UE at 5G.
  • UPF User Plane Function
  • the SMF returns a PDU session setup response message to the AMF, where the message carries the PDU session context.
  • the AMF sends a handover request message to the 5G base station, where the message carries the source-to-target transparent container and the PDU session context.
  • the 5G base station determines the radio resource information used by the UE in the 5G base station according to the source-to-target transparent container and the PDU session context, and generates a target to source transparent container, and sends the carry target to the source transparent container to the AMF. Switching reply message.
  • the AMF sends a forward redirect response message to the MME, where the message includes a target-to-source transparent container.
  • the MME sends a handover command handover command to the enhanced E-UTRAN, where the message carries the target to the source transparent container.
  • the enhanced E-UTRAN sends a handover command handover command message to the UE, where the message carries the target-to-source transparent container, and the UE updates the radio resource information according to the handover message, and returns a handover complete message to the 5G base station.
  • the 4G base station in the above handover procedure is an enhanced E-UTRAN, which is not a conventional E-UTRAN of 4G.
  • E-UTRAN In the initial stage of 5G deployment, all 4G E-UTRANs are not enhanced, and some un-enhanced Es exist. -UTRAN.
  • the un-enhanced E-TURTAN considers the target base station to be a 4G base station and switches the UE to the 4G network, when the UE is never enhanced within 4G.
  • the network handover method, device and system proposed by the present application are used to solve the problem of how to switch between 4G and 5G within the Evolved E-UTRAN when the UE is in the connected state in the Evolved E-UTRAN, so that the UE is in 4G and When moving between 5Gs, business continuity can be guaranteed.
  • the first communication system is a 4G communication system
  • the second communication system is a 5G communication system.
  • the network element is the AMF
  • the second core network element of the first communication system is the MME
  • the third core network element of the second communication system is the SMF
  • the base station of the first communication system is the E-UTRAN and the Evolved E-UTRAN.
  • the UE may access the first communication system or the second communication system through the Evolved E-UTRAN.
  • the prior art inter-base station handover is that the UE switches from the base station of the first communication system to the base station of the second communication system, and switches within the base station.
  • the UE performs switching between 4G and 5G inside the Evolved E-UTRAN of the base station of the 4G communication system.
  • the intra-base station handover includes the UE performing handover between communication systems when the base station is unchanged, for example, switching from 4G to 5G, or performing radio access technology (RAT) handover when the base station is unchanged.
  • RAT radio access technology
  • FIG. 2 is a schematic diagram of an interaction process of a network switching method according to Embodiment 1 of the present application.
  • a UE initiates a request to an Evolved E-UTRAN to request a handover from a 4G communication system to a 5G communication system within the Evolved E-UTRAN.
  • Or conversion, as shown in Figure 2, the method includes:
  • the UE learns that the currently accessed base station supports the 5G communication system.
  • the base station is an Evolved E-UTRAN, and the UE can learn by referring to the indication information that the base station supports the access to the 5G core network carried in the system information (SIB) sent by the base station; or the UE can control the radio resource by the receiving base station.
  • SIB system information
  • the base station carried in the (Radio Resource Control, RRC) supports the indication information of the access to the 5G core network.
  • Performing intra-base station handover includes performing handover between communication systems when the base station is unchanged; or performing inter-RAT handover when the base station is unchanged; or switching from the 4G system to the case where the base station is unchanged 5G system; or, from the 4G RAT to the 5G RAT if the base station is unchanged.
  • first information, the second information, the third information, the fourth information, the fifth information, and the like in the present application may be a specific parameter or a combination of multiple parameters.
  • the base station sends a handover request message (Handover required) to the MME according to the request message, where the handover request message carries the identifier of the UE and the third information, or the handover request message carries the identifier and the first information of the UE, and carries the target base station.
  • the handover request message is used to enable the MME to learn to handover the UE from the 4G communication system to the 5G communication system, and the third information is used to indicate handover within the base station.
  • Performing intra-base station handover includes performing handover between communication systems when the base station is unchanged; or performing inter-RAT handover when the base station is unchanged; or switching from the 4G system to the case where the base station is unchanged 5G system; or, from the 4G RAT to the 5G RAT if the base station is unchanged.
  • the base station may send a handover request message to the MME according to the first information carried in the request message.
  • the identifier of the UE is an identifier that is allocated by the base station to the UE, for example, the C-RNTI of the UE in the 4G communication system, or the identifier of the UE is an identifier that the MME allocates for the UE.
  • the UE is S-TMSI in a 4G communication system.
  • the third information may be the same as or different from the first information.
  • the UE may carry the identifier of the UE in the request message, the base station obtains the identifier of the UE from the request message, and carries the identifier of the UE obtained from the request message in the handover request message; or the base station locally obtains the identifier of the UE, and performs the handover request.
  • the message carries the identity of the locally obtained UE.
  • the identifier of the UE and the first information, or the identifier of the UE and the third information are carried by the source to the target transparent container.
  • the advantage that the source-to-target transparent container carries is that the MME does not need to be modified, and the MME can process according to the inter-system handover procedure of the prior art.
  • the MME determines, according to the handover request message, that the UE needs to perform the handover of the 4G communication system to the 5G communication system, and sends a forward relocation request message to the AMF of the 5G communication system, and carries the UE in the forward redirection request message.
  • the identifier the indication information for indicating handover in the base station, the identifier of the target base station, and the target TAI, the MM context, and the PDN connection context.
  • the AMF determines an SMF of the second communication system that serves the UE, and sends a PDU session establishment request to the SMF, where the PDU session establishment request carries a PDN connection context.
  • the first information or the third information is further carried.
  • the SMF determines a PDU session context used by the UE in the second communication system according to a PDN connection (connection or connectivity) context.
  • the SMF may send the PDN connection context to the PCF, and the PCF determines a PDU session context used by the UE in the second communication system, and sends the PDU session context to the SMF.
  • the SMF sends a Session Creation request to the UPF to establish a PDU session for the UE in the 5G communication system.
  • the SMF returns a PDU session establishment response (Session Establishment response) to the AMF.
  • the PDU session establishment response carries a PDU session context, and the PDU session context includes a rule of one or more Quality of Service (QoS) flows allocated by the SMF for the UE.
  • QoS Rule includes the following information: Traffic Flow Template (TFT), QoS Configuration (Profile), QoS Flow Identification (ID), and Priority (Precedence).
  • the AMF sends a handover request message to the base station, where the handover request message carries an identifier of the UE, a PDU session context, and indication information for indicating handover in the base station.
  • the indication information may be the first information or the third information.
  • the identifier and indication information of the UE are carried by the source to the target transparent container.
  • the base station determines, according to the handover request message, second information used by the UE in the 5G communication system.
  • the second information includes the radio resource information used by the UE to access the second communication system by using the base station.
  • the base station determines, according to the identifier of the UE, the indication information used to indicate handover in the base station, that the UE is in the 4G.
  • the radio resource information used in the UE determines the session information of the UE in 5G according to the PDU session context.
  • the base station determines the radio resource information used by the UE in the 5G according to the radio resource information used by the UE in the 4G and the session information of the UE in the 5G. Then, the base station saves the correspondence between the identifier of the UE and the second information.
  • the radio resource information includes a data radio bearer (DRB) and/or a signaling radio bearer (SRB) used by the UE to access the second communication system through the base station.
  • DRB data radio bearer
  • SRB signaling radio bearer
  • the base station sends a handover request acknowledgement message to the AMF.
  • the AMF sends a PDU session modification request to the SMF, and is used to establish, for the UE, a tunnel for transmitting data between the base station and the UPF.
  • the AMF sends a forward relocation response message to the MME, where the message carries the SM context and the identifier of the UE.
  • the MME sends a handover command to the base station, where the SM command carries the identifier of the SM context and the UE.
  • the base station determines the radio resource information saved in the S110 according to the identifier of the UE, and sends a handover command message to the UE, where the PDU session context is further carried in the handover command message.
  • the UE updates the radio resource information according to the handover command message, and returns a handover complete message to the base station.
  • the base station sends a handover complete message to the AMF.
  • AMF updates the SMF.
  • the UE sends a 5G location update message to the AMF.
  • the network switching method provided in this embodiment, after the UE learns that the current base station supports the 5G communication system, initiates a request for requesting intra-base station handover to the current base station, and then performs signaling interaction between the base station and the MME, the AMF, and the SMF.
  • the base station determines the radio resource information used by the UE in the 5G communication system and saves the correspondence between the identifier of the UE and the radio resource information.
  • the MME sends the handover command to the base station
  • the base station determines, according to the identifier of the UE, the UE is used in the 5G communication system.
  • the radio resource information is sent to the UE, and finally the UE updates the radio resource information according to the handover command message, and the handover is completed.
  • the UE performs handover between 4G and 5G within the Evolved E-UTRAN.
  • the continuity of the service can be ensured.
  • FIG. 3 is a schematic diagram of the interaction process of the network switching method according to Embodiment 2 of the present application.
  • the UE is directed to The current core network element MME initiates a request to perform handover or conversion of the 4G communication system to the 5G communication system within the Evolved E-UTRAN.
  • the method includes:
  • the UE learns that the currently accessed base station supports the 5G communication system.
  • the UE sends a RAT change request or a Tracking Area Update (TAU) request to the MME through the base station, and the RAT conversion request or the TAU request is used to request intra-base station handover.
  • Performing intra-base station handover includes performing handover between communication systems when the base station is unchanged; or performing inter-RAT handover when the base station is unchanged.
  • the request may carry the identifier of the UE and the fifth information, where the fifth information is used to indicate that the handover is performed within the base station.
  • the MME determines an AMF of the second communications system, and the MME determines, according to the first information, that the UE needs to perform handover of the first communications system to the second communications system, and sends a forward relocation request message to the AMF.
  • the redirection request message carries an identifier of the UE, indication information for indicating handover in the base station, an identifier of the target base station and a target TAI, a Mobility Management (MM) context, and a PDN connection context.
  • S204 to S207 are the same as the steps S105 to S108 shown in FIG. 2, and are not described herein again.
  • the AMF sends a handover request message to the base station, where the handover request message carries the identifier of the UE, the PDU session context, the first information, and the SM context.
  • the AMF determines the base station according to the identifier of the target base station in S203.
  • the base station determines, according to the handover request message, second information used by the UE in the 5G communication system.
  • the second information includes the radio resource information used by the UE to access the 5G communication system by using the base station.
  • the base station determines the radio resource information used by the UE in the 4G according to the identifier and the first information of the UE, according to the PDU.
  • the session context determines the session information of the UE in 5G.
  • the base station determines the radio resource information used by the UE in the 5G according to the radio resource information used by the UE in the 4G and the session information of the UE in the 5G.
  • the base station sends a handover command message to the UE, where the handover command message carries the radio resource information determined by S209, and the handover command message may further carry the PDU session context.
  • the PDU session context contains information about one or more QoS flows used by the UE in 5G, including information such as QoS, flow ID, TFT, and priority of the flow.
  • the UE When the UE has uplink data transmission, it can select the correct QoS flow for transmission according to the PDU session context.
  • the network switching method provided in this embodiment, after the UE learns that the current base station supports the 5G communication system, initiates a request to the MME to carry a message for indicating handover in the base station, and then passes the letter between the base station and the MME, the AMF, and the SMF.
  • the base station determines the radio resource information used by the UE in the 5G communication system, and sends a handover command message to the UE.
  • the UE updates the radio resource information according to the handover command message, and the handover is completed. Therefore, when the Evolved E-UTRAN is in the connected state, the UE performs handover between 4G and 5G within the Evolved E-UTRAN. When the UE moves between 4G and 5G, the continuity of the service can be ensured.
  • FIG. 4 is a schematic diagram of an interaction process of a network switching method according to Embodiment 3 of the present application.
  • a UE initiates a request to a target core network element AMF to request a 4G communication system to a 5G communication system within the Evolved E-UTRAN.
  • Switching or converting as shown in Figure 4, the method includes:
  • the UE learns that the currently accessed base station supports the 5G communication system.
  • the UE sends a Radio Resource Control (RRC) message to the base station, where the RRC message includes a 5G indication message, and the RRC message includes a 5G mobility registration update message, where the 5G mobility registration update message carries the UE.
  • RRC Radio Resource Control
  • the identifier, the fourth information, and the 5G Globally Unique Temporary UE Identity (GUTI) the fourth information is used to indicate that the handover is performed within the base station.
  • the 5G mobility registration update message may specifically be a registration message carrying a mobility registration update (mobility registration update) indication.
  • the 5G GUTI may be obtained by the UE according to the 4G GUTI mapping.
  • the base station sends a 5G mobility registration update message in the RRC message to the AMF according to the 5G indication message in the RRC message.
  • the 5G mobility registration update message is used by the UE to request a location update, or for the UE to request a mobile registration update.
  • the AMF acquires context information of the UE from the MME.
  • the UE can obtain the 4G GUTI according to the 5G GUTI mapping, and the message sent by the AMF to the MME carries the 4G GUTI.
  • S305 to S308 are the same as the steps S105 to S108 shown in FIG. 2, and are not described herein again.
  • S309 to S311 are the same as the steps S208 to S210 shown in FIG. 3, and are not described herein again.
  • the network switching method provided in this embodiment, after the UE learns that the current base station supports the 5G communication system, the base station initiates a request to the AMF to carry a message for indicating handover in the base station, and then passes between the base station and the MME, the AMF, and the SMF.
  • the base station determines the radio resource information used by the UE in the 5G communication system, and sends a handover command message to the UE.
  • the UE updates the radio resource information according to the handover command message, and the handover is completed. Therefore, when the Evolved E-UTRAN is in the connected state, the UE performs handover between 4G and 5G within the Evolved E-UTRAN. When the UE moves between 4G and 5G, the continuity of the service can be ensured.
  • the application may divide the functional modules of the UE and the base station according to the foregoing method example.
  • each functional module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 5 is a schematic structural diagram of Embodiment 1 of a UE according to the present application.
  • the apparatus in this embodiment may include: a sending module 21, a receiving module 22, and a processing module 23, where the processing module 23 is configured to access the first through the base station.
  • the communication system is configured to support the second communication system, and the transmitter 41 is configured to: after the base station supports the second communication system, the first message is sent to the base station, and the first message carries the first information.
  • the first information is used to indicate that the handover is performed in the base station; the receiving module 22 is configured to receive the second message sent by the base station, and the second message carries the second information used by the UE in the second communication system; the processing module 23 is further configured to use The second information is accessed to the second communication system. Wherein the version of the second communication system is higher than the first communication system.
  • the first message is used to request to switch from the first communications system to the second communications system, so that the base station sends a third message to the second core network element of the first communications system, where the third message carries the identifier of the UE.
  • the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed in the base station.
  • the first message is used to request to switch from the first communications system to the second communications system, so that the base station sends a third message to the second core network element of the first communications system, where the third message carries the identifier of the UE.
  • the third message carries the identifier of the UE.
  • the third The information is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system.
  • the identifier and the first information of the UE are carried by the source to the target transparent container.
  • the processing module 23 is specifically configured to: monitor the indication information carried in the system information sent by the base station, and learn that the base station supports the second communication system; or the receiving module 22 is further configured to receive the The processing module 23 is specifically configured to learn, according to the indication information, that the base station supports the second communication system.
  • the first message includes a fourth message sent by the UE to the first core network element, so that the base station sends a fourth message to the first core network element, where the fourth message carries the identifier and the fourth information of the UE.
  • the fourth information is used to indicate handover within the base station, the fourth message is used for the UE to request location update, or the fourth message is used for the UE to request mobile registration update.
  • the first message includes a fifth message sent by the UE to the second core network element, so that the base station sends a fifth message to the first core network element, where the fifth message carries the identifier and the fifth information of the UE.
  • the fifth message is used to indicate that the handover is performed within the base station, and the fifth message is used for the UE to request location update.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier assigned by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the user equipment in this embodiment may be used to implement the technical solution of the method embodiment shown in any of FIG. 4 to FIG. 6.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station according to the present application.
  • the base station in this embodiment may include: a receiving module 31, a processing module 32, and a sending module 33, where the receiving module 31 is configured to receive the second communications.
  • the first message sent by the first core network element of the system the first message is used to request to switch the user equipment UE from the first communication system to the second communication system, where the first message carries the identifier and the first information of the UE,
  • the information is used to indicate the handover in the base station;
  • the processing module 32 is configured to determine, according to the first condition, the second information used by the UE in the second communication system, where the first condition includes the identifier and the first information of the UE, and the sending module 33 uses Sending a second message to the UE, where the second message carries the second information.
  • the version of the second communication system is higher than the first communication system.
  • the receiving module 31 is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive a third message sent by the UE, where the third message is used to request the first communication system. Switch to the second communication system.
  • the sending module 33 is further configured to: send a fourth message to the second core network element of the first communications system, where the fourth message carries the identifier of the UE and the third information, where the fourth message is used to learn the second core network element
  • the UE is handed over from the first communication system to the second communication system, and the third information is used to indicate handover within the base station.
  • the receiving module 31 is further configured to: before receiving the first message sent by the first core network element of the second communications system, receive a third message sent by the UE, where the third message is used to request to switch from the first communications system.
  • the sending module 33 is further configured to: send a fourth message to the second core network element of the first communications system, where the fourth message carries the identifier of the UE and the first information, where the fourth message is used to learn the second core network element The UE is handed over from the first communication system to the second communication system.
  • the identifier and the first information of the UE are carried by the source to the target transparent container.
  • the processing module 32 is further configured to: before the sending the module 33 sends the second message to the UE, save the correspondence between the identifier of the UE and the second information; the sending module 33 is further configured to send the first core network element The acknowledgement message of the message; the receiving module 31 is further configured to receive the fifth message sent by the second core network element, where the fifth message carries the UE.
  • the sending module 33 is further configured to: obtain the second information according to the identifier and the corresponding relationship of the UE, and send the second information to the UE; or the receiving module 31 is further configured to receive the fifth message sent by the second core network element, The fifth message carries the identifier of the UE and the protocol data unit PDU session context.
  • the sending module 33 is further configured to obtain the second information according to the identifier and the correspondence of the UE, and send the second information and the PDU session context to the UE.
  • the receiving module 31 is further configured to: before receiving the first message sent by the first core network element of the second communications system, receive the sixth message sent by the UE, where the sixth message includes the UE to the first core network.
  • the seventh message sent by the network element the seventh message carries the identifier of the UE and the fourth information, the fourth information is used to indicate that the handover is performed in the base station, and the sending module 33 is further configured to send the seventh message to the first core network element.
  • the seventh message is used for the UE to request location update, or the seventh message is used for the UE to request mobile registration update.
  • the receiving module 31 is further configured to: before receiving the first message sent by the first core network element of the second communications system, receive the eighth message sent by the UE, where the eighth message includes the UE to the second core network.
  • the ninth message sent by the network element the ninth message carries the identifier of the UE and the fourth information, the fourth information is used to indicate that the handover is performed in the base station, and the sending module 33 is further configured to send the ninth message to the first core network element.
  • the ninth message is used by the UE to request tracking area update.
  • the first information further includes a PDU session context
  • the processing module 32 is specifically configured to: obtain radio resource information of the UE in the first communication system according to the first condition, and generate the radio resource information and the PDU session context based on the first communication system. Second message.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier assigned by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the base station of this embodiment may be used to perform the technical solution of the method embodiment shown in any of FIG. 2 to FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the communication system provided by the present application includes the UE shown in FIG. 5 and the base station shown in FIG. 6.
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of the UE according to the present application.
  • the apparatus in this embodiment may include: a transmitter 41, a receiver 42 and a processor 43.
  • the processor 43 is configured to access the first through the base station.
  • the communication system is configured to support the second communication system, and the transmitter 41 is configured to: after the base station supports the second communication system, the first message is sent to the base station, and the first message carries the first information.
  • the first information is used to indicate that the handover is performed in the base station;
  • the receiver 42 is configured to receive the second message sent by the base station, and the second message carries the second information used by the UE in the second communication system;
  • the processor 43 is further configured to use The second information is accessed to the second communication system. Wherein the version of the second communication system is higher than the first communication system.
  • the first message is used to request to switch from the first communications system to the second communications system, so that the base station sends a third message to the second core network element of the first communications system, where the third message carries the identifier of the UE.
  • the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system, and the third information is used to indicate that the handover is performed in the base station.
  • the first message is used to request to switch from the first communications system to the second communications system, so that the base station sends a third message to the second core network element of the first communications system, where the third message carries the identifier of the UE.
  • the third message is used to enable the second core network element to learn to switch the UE from the first communication system to the second communication system.
  • the identifier and the first information of the UE are carried by the source to the target transparent container.
  • the processor 43 is specifically configured to: monitor the indication information carried in the system information sent by the base station to learn that the base station supports the second communication system; or the receiver 42 is further configured to receive the Describe the information sent by the base station, where the processor 43 is specifically configured to learn, according to the indication information, that the base station supports the second communication system.
  • the first message includes a fourth message sent by the UE to the first core network element, the fourth message carries the identifier of the UE and the fourth information, and the fourth information is used to indicate that the handover is performed in the base station, so that the base station
  • the first core network element sends a fourth message, where the fourth message is used for the UE to request location update, or the fourth message is used by the UE to request mobile registration update.
  • the first message includes a fifth message sent by the UE to the second core network element, the fifth message carries the identifier of the UE and the fifth information, and the fifth information is used to indicate that the handover is performed in the base station, so that the base station
  • the first core network element sends a fifth message, and the fifth message is used by the UE to request location update.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier assigned by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the user equipment in this embodiment may be used to perform the technical solution of the method embodiment shown in any of FIG. 2 to FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of Embodiment 2 of a base station according to the present application.
  • the base station in this embodiment may include: a receiver 51, a processor 52, and a transmitter 53, wherein the receiver 51 is configured to receive the second communication.
  • the first message sent by the first core network element of the system the first message is used to request to switch the user equipment UE from the first communication system to the second communication system, where the first message carries the identifier and the first information of the UE, A message is used to indicate that the handover is performed in the base station; the processor 52 is configured to determine, according to the first condition, the second information used by the UE in the second communication system, where the first condition includes the identifier of the UE and the first information; Sending a second message to the UE, where the second message carries the second information.
  • the version of the second communication system is higher than the first communication system.
  • the receiver 51 is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive a third message sent by the UE, where the third message is used to request the first communication system. Switch to the second communication system.
  • the transmitter 53 is further configured to: send a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the third information, where the fourth message is used to learn the second core network element
  • the UE is handed over from the first communication system to the second communication system, and the third information is used to indicate handover within the base station.
  • the receiver 51 is further configured to: before receiving the first message sent by the first core network element of the second communications system, receive a third message sent by the UE, where the third message is used to request to switch from the first communications system.
  • the transmitter 53 is further configured to: send a fourth message to the second core network element of the first communication system, where the fourth message carries the identifier of the UE and the first information, where the fourth message is used to learn the second core network element The UE is handed over from the first communication system to the second communication system.
  • the identifier and the first information of the UE are carried by the source to the target transparent container.
  • the processor 52 is further configured to: before the transmitter 53 sends the second message to the UE, save the correspondence between the identifier of the UE and the second information; the transmitter 53 is further configured to send the first core network element The acknowledgement message of the message; the receiver 51 is further configured to receive the fifth message sent by the network element of the second core network, where the fifth message carries the identifier of the UE, and the transmitter 53 is further configured to obtain the second message according to the identifier and the corresponding relationship of the UE.
  • the receiver 51 is further configured to receive the fifth message sent by the second core network element, where the fifth message carries the identifier of the UE and the protocol data unit PDU session context, and the transmitter 53
  • the method is further configured to obtain second information according to the identifier and the correspondence of the UE, and send the second information and the PDU session context to the UE.
  • the receiver 51 is further configured to: receive the first message sent by the first core network element of the second communication system Before receiving the sixth message sent by the UE, the sixth message includes the seventh message sent by the UE to the first core network element, the seventh message carries the identifier of the UE and the fourth information, and the fourth information is used to indicate in the base station.
  • the switch 53 is further configured to send a seventh message to the first core network element, the seventh message is used by the UE to request location update, or the seventh message is used by the UE to request mobile registration update.
  • the receiver 51 is further configured to: before receiving the first message sent by the first core network element of the second communication system, receive an eighth message sent by the UE, where the eighth message includes the UE to the second core network.
  • the ninth message sent by the network element the ninth message carries the identifier of the UE and the fourth information, the fourth information is used to indicate that the handover is performed in the base station, and the transmitter 53 is further configured to send the ninth message to the first core network element.
  • the ninth message is used by the UE to request tracking area update.
  • the first information further includes a PDU session context
  • the processor 52 is specifically configured to: obtain radio resource information of the UE in the first communication system according to the first condition, and generate the radio resource information and the PDU session context based on the first communication system. Second message.
  • the second information includes: radio resource information used by the UE to access the second communication system by using the base station.
  • the identifier of the UE is an identifier assigned by the base station to the UE, or the identifier of the UE is an identifier allocated by the second core network element to the UE.
  • the base station of this embodiment may be used to perform the technical solution of the method embodiment shown in any of FIG. 2 to FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the communication system provided by the present application includes the UE shown in FIG. 7 and the base station shown in FIG. 8.
  • aspects of the present application, or possible implementations of various aspects can be embodied as a system, method, or computer program product. Accordingly, aspects of the present application, or possible implementations of various aspects, may be in the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.), or a combination of software and hardware aspects, They are collectively referred to herein as "circuits," “modules,” or “systems.” Furthermore, aspects of the present application, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.
  • the computer readable medium can be a computer readable signal medium or a computer readable storage medium.
  • the computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), Erase programmable read-only memory (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).
  • the processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.
  • the computer readable program code can execute entirely on the user's local computer, partly on the user's local computer, as a separate software package, partly on the user's local computer and partly on the remote computer, or entirely on the remote computer or Executed on the server. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. E.g, Depending on the functionality involved, two steps, or two blocks, shown in succession may actually be performed substantially concurrently, or the blocks may sometimes be performed in the reverse order.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé, un dispositif et un système de commutation de réseau, le procédé comprenant les étapes suivantes : un équipement utilisateur (UE) accède à un premier système de communication au moyen d'une station de base, et envoie un premier message à la station de base après avoir appris que la station de base prend en charge un second système de communication, le premier message transportant des premières informations, et les premières informations étant utilisées pour ordonner à la station de base d'effectuer un basculement à l'intérieur de celle-ci ; l'UE reçoit un second message envoyé par la station de base, le second message transportant des secondes informations utilisées par l'UE dans le second système de communication ; et l'UE accède au second système de communication à l'aide des secondes informations.
PCT/CN2017/081427 2017-04-21 2017-04-21 Procédé de commutation de réseau, dispositif et système Ceased WO2018191952A1 (fr)

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CN201780050062.5A CN109565723B (zh) 2017-04-21 2017-04-21 网络切换方法、装置与系统

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