WO2020029842A1 - 接入方法、切换方法、设备及系统 - Google Patents

接入方法、切换方法、设备及系统 Download PDF

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Publication number
WO2020029842A1
WO2020029842A1 PCT/CN2019/098550 CN2019098550W WO2020029842A1 WO 2020029842 A1 WO2020029842 A1 WO 2020029842A1 CN 2019098550 W CN2019098550 W CN 2019098550W WO 2020029842 A1 WO2020029842 A1 WO 2020029842A1
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Prior art keywords
network
mobility management
converged
network device
access
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PCT/CN2019/098550
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English (en)
French (fr)
Inventor
陈靖
杜如川
陆长奇
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华为技术有限公司
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Publication of WO2020029842A1 publication Critical patent/WO2020029842A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present application relates to the field of communication technologies, and in particular, to an access method, a handover method, a device, and a system.
  • a single registered terminal can only register on a 4th generation (4G) network or a 5th generation (5G) network at the same time, and migrate between the 4G network and the 5G network through a network reselection or switching process.
  • Dual registration terminals can register on 4G network and 5G network at the same time, but will not perform network reselection or switching process between 4G network and 5G network.
  • the embodiments of the present application provide an access method, a handover method, a device, and a system, so that the re-access or handover process of a dual-registered terminal can be implemented on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • an access method in a first aspect, includes: an access device in a first network receives an access request from a terminal, the access request carrying a first mobility management identifier and a third mobility management identifier Wherein the first mobility management identifier is an identifier of a first mobility management network element in the first network, and the third mobility management identifier is a global unique temporary identifier GUTI by the terminal in the second network.
  • the mobile management identifier in the first network obtained by the mobile management identifier mapping, wherein the first network and the second network are different types of networks; the access device determines the mobile network according to the first mobile management identifier.
  • the access device determines a target converged network device according to the third mobility management identifier, and the target converged network device serves as the second network.
  • the target converged network device is used for the terminal access Into the first network.
  • the target converged network device in the access system integrates the functions of the mobile management network element in the first network and the functions of the mobile management network element in the second network, it not only reduces the network
  • the number of devices simplifies the workload of network operation and maintenance; it also reduces the network address resources and simplifies the complexity of network planning and deployment; moreover, it can flexibly adjust according to the traffic of the first network and the second network
  • the access request received by the access device in the first network not only carries the identity of the first mobility management network element in the first network, but also carries the identity of the terminal in the second network in the second network by the terminal in the second network.
  • the mobile management identifier in the first network obtained by the mobile management identifier mapping in the GUTI allows the access device to determine that the access device and the first mobile management network element are not connected according to the first mobile management identifier.
  • a target converged network device is determined.
  • the mapped mobility management identifier in the first network is the third mobility management identifier.
  • the dual-registered terminal when re-accessing in the first network, it can also be ensured that the same converged network device is selected and dual registration is achieved. Reconnection of the terminal.
  • the re-access of dual-registered terminals can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the access method before the access device in the first network receives an access request from the terminal, the access method further includes: the access device sends a setup request to the target converged network device, and the setup The request is used to request registration to the target converged network device; the access device receives a setup response from the target converged network device, where the setup response carries a second mobility management identifier and the third mobility management identifier, wherein the second mobile The management identifier is an original mobility management identifier corresponding to the target converged network device as the second mobility management network element in the first network. Based on this solution, the access device can obtain the second mobility management identity and the third mobility management identity.
  • the first network is a fourth-generation 4G network
  • the second network is a fifth-generation 5G network
  • the first mobility management identifier is the first globally unique mobility management entity identifier.
  • GUMMEI the third mobility management identifier is a third GUMMEI.
  • the first network is a 5G network
  • the second network is a 4G network
  • the first mobile management identifier is the first globally unique access and mobility management function identifier, GUAMI
  • the third mobile The management identity is the third GUAMI.
  • an access method includes: a first converged network device receiving an access request from an access device in a first network, the access request carrying a terminal in the second network The globally unique temporary identification GUTI, where the first network and the second network are different types of networks; and the first converged network device determines, according to the GUTI, a second converged network device that the terminal used to connect through the access device Access the second network; the first converged network device sends the access request to the second converged network device, and the access request is used for the terminal to access the first network through the second converged network device.
  • the converged network devices including the first converged network device and the second converged network device
  • the functions of mobile management network elements not only reduce the number of devices in the network, simplify the workload of network operation and maintenance, but also reduce the network address resources, simplify the complexity of network planning and deployment; moreover, it can also Flexiblely adjust the occupation ratio of hardware resources according to the traffic of the first network and the second network, and share hardware resources, thereby improving resource utilization efficiency and return on investment.
  • the access request sent by the access device in the first network to the first converged network device carries the GUTI of the terminal in the second network, so that the first converged network device can determine that the terminal has passed the GUTI according to the GUTI.
  • the second converged network device connected to the access device accesses the second network, and the first converged network device may send an access request to the second converged network device, and the access request is used for the terminal to access the first converged network device through the second converged network device.
  • the dual-registered terminal when re-accessing in the first network, it can also be ensured that the same converged network device is selected and dual registration is achieved. Reconnection of the terminal.
  • the re-access of dual-registered terminals can be realized on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the first converged network device determines, according to the GUTI, that the terminal accesses the second network through a second converged network device connected to the access device, specifically: the first converged network device It is determined that the GUTI is not the GUTI allocated by the first converged network device; the first converged network device determines that the mobile management resource pool to which the mobile management network element to which the GUTI is allocated and the first converged network device are mobiles in the second network When the mobile management resource pool to which the network element is managed is the same, the first converged network device determines that the second converged network device connected to the terminal through the access device accesses the second network. Based on this solution, the first converged network device may determine that the second converged network device connected to the terminal through the access device accesses the second network.
  • the first converged network device determines, according to the GUTI, that the terminal accesses the second network through a second converged network device connected to the access device, specifically: the first converged network device It is determined that the GUTI is not the GUTI allocated by the first converged network device; the first converged network device obtains address information of a target mobile management network element that allocates the GUTI to the terminal, and can provide the access device in the first network with access information The address information of the candidate mobile management network element of the service; in the case that the information of the target mobile management network element is in the address information of the candidate mobile management network element, the first converged network device determines that the terminal has passed the access device The connected second converged network device accesses the second network. Based on this solution, the first converged network device may determine that the second converged network device connected to the terminal through the access device accesses the second network.
  • the first converged network device sends the access request to the second converged network device.
  • the first converged network device sends a rerouting request message to the access device, and the rerouting The request message carries the access request and a mapped mobility management identifier in the first network that is obtained by mapping the first mobility management identifier in the GUTI, where the mapped mobility management identifier is used by the access device to the second
  • the converged network device sends the access request. That is, the first converged network device may send an access request to the second converged network device in a manner that the access device reroutes.
  • the access method further includes: obtaining, by the first converged network device, the address information of the second converged network device according to the GUTI; and accordingly, the first converged network device converges to the second converged device.
  • the network device sends the access request, specifically, the first converged network device sends the access request to the second converged network device according to the address information of the second converged network device. That is, the first converged network device can be directly directed to the second converged network device.
  • obtaining the address information of the second converged network device according to the GUTI by the first converged network device is specifically: the first converged network device sends a first request message, and the first request message carries The mapped mobility management identifier in the first network, which is obtained by mapping the first mobility management identifier in the GUTI, is used to query address information of the second converged network device; the first converged network device receives a first response message, The first response message carries address information of the second converged network device. Based on this solution, the first converged network device can obtain the address information of the second converged network device.
  • the first network is a fourth-generation 4G network and the second network is a fifth-generation 5G network.
  • the first converged network device sends a first request message, specifically: the first A converged network device sends the first request message to a DNS server of the domain name system.
  • the first converged network device receives the first response message.
  • the first converged network device receives the first response from the DNS server. Message. That is, the first converged network device can query the address information of the second converged network device from the DNS server.
  • the first network is a 5G network
  • the second network is a 4G network.
  • the first converged network device sends a first request message.
  • the first converged network device sends a first request message to the network.
  • the storage function network element sends the first request message; correspondingly, the first converged network device receives the first response message.
  • the first converged network device receives the first response message from the network storage function network element. That is, the first converged network device can query the address information of the second converged network device from the network storage function network element.
  • the first converged network device obtains the address information of the second converged network device according to the GUTI. Specifically, the first converged network device sends a second request message, and the second request message carries The first mobility management identifier in the GUTI is used to query the address information of the second converged network device; the first converged network device receives a second response message, and the second response message carries the address information of the second converged network device . Based on this solution, the first converged network device can obtain the address information of the second converged network device.
  • the first network is a 4G network
  • the second network is a 5G network.
  • the first converged network device sends a second request message.
  • the first converged network device sends a second request message to the network.
  • the storage function network element sends the second request message; correspondingly, the first converged network device receives a second response message, which is specifically: the first converged network device receives the second response message from the network storage function network element. That is, the first converged network device can query the address information of the second converged network device from the network storage function network element.
  • the first network is a 5G network and the second network is a 4G network.
  • the first converged network device sends a second request message, specifically: the first converged network device sends a DNS request to the DNS.
  • the server sends the second request message; correspondingly, the first converged network device receives the second response message, specifically, the first converged network device receives the second response message from the DNS server. That is, the first converged network device can query the address information of the second converged network device from the DNS server.
  • the access method further includes: determining, by the first converged network device, the address information of the target mobility management network element as address information of the second converged network device; and correspondingly, the first converged network device
  • the network device sends the access request to the second converged network device.
  • the first converged network device sends the access request to the second converged network device according to the address information of the second converged network device. That is, the first converged network device can be directly directed to the second converged network device.
  • the acquiring, by the first converged network device, address information of a target mobile management network element that allocates the GUTI to the terminal specifically: the first converged network device sends a first request message, the first request The message carries the mapped mobility management identifier in the first network, which is obtained by mapping the first mobility management identifier in the GUTI, and is used to query the address information of the target mobility management network element; the first converged network device receives a first response Message, the first response message carries address information of the target mobility management network element.
  • the first converged network device can obtain the address information of the target mobile management network element that assigns the GUTI to the terminal.
  • the first network is a 4G network and the second network is a 5G network.
  • the first converged network device sends a first request message, specifically: the first converged network device sends a DNS request to the DNS.
  • the server sends the first request message; correspondingly, the first converged network device receives the first response message, specifically, the first converged network device receives the first response message from the DNS server. That is, the first converged network device can query the address information of the target mobility management network element from the DNS server.
  • the first network is a 5G network
  • the second network is a 4G network.
  • the first converged network device sends a first request message.
  • the first converged network device sends a first request message to the network.
  • the storage function network element sends the first request message; correspondingly, the first converged network device receives the first response message.
  • the first converged network device receives the first response message from the network storage function network element. That is, the first converged network device can query the address information of the target mobility management network element from the network storage function network element.
  • the acquiring, by the first converged network device, address information of a target mobile management network element that allocates the GUTI to the terminal specifically: the first converged network device sends a second request message, and the second request The message carries the first mobility management identifier in the GUTI and is used to query the address information of the target mobility management network element for which the GUTI is allocated for the terminal; the first converged network device receives a second response message, and the second response message carries the Address information of the target mobility management network element.
  • the first converged network device can obtain the address information of the target mobile management network element that assigns the GUTI to the terminal.
  • the first network is a 4G network
  • the second network is a 5G network.
  • the first converged network device sends a second request message.
  • the first converged network device sends a second request message to the network.
  • the storage function network element sends the second request message; correspondingly, the first converged network device receives a second response message, which is specifically: the first converged network device receives the second response message from the network storage function network element. That is, the first converged network device can query the address information of the target mobility management network element from the network storage function network element.
  • the first network is a 5G network and the second network is a 4G network.
  • the first converged network device sends a second request message, specifically: the first converged network device sends a DNS request to the DNS.
  • the server sends the second request message; correspondingly, the first converged network device receives the second response message, specifically, the first converged network device receives the second response message from the DNS server. That is, the first converged network device can query the address information of the target mobility management network element from the DNS server.
  • the first converged network device obtains address information of a candidate mobile management network element capable of providing services to an access device in the first network. Specifically, the first converged network device receives the information from the first converged network device. The address information of the candidate mobility management network element of the source mobility management network element that can provide services to the access device in the first network. Based on this solution, the first converged network device may obtain address information of a candidate mobile management network element capable of providing services to access devices in the first network.
  • the first converged network device obtains address information of a candidate mobile management network element capable of providing services to an access device in the first network. Specifically, the first converged network device receives the information from the first converged network device. The identity of the access device of the source mobility management network element, or the identity of the tracking area served by the access device; the first converged network device according to the identity of the access device, or the tracking area served by the access device To obtain address information of a candidate mobile management network element capable of providing services to an access device in the first network. Based on this solution, the first converged network device may obtain address information of a candidate mobile management network element capable of providing services to access devices in the first network.
  • a handover method includes: a source mobility management network element in a first network receives a handover requirement from a first access device in the first network, and the handover requirement carries the first An identifier of a second access device of the network or an identifier of a tracking area served by the second access device, and a globally unique temporary identifier GUTI of the terminal in the second network, wherein the first network and the first network
  • the second network is a different type of network;
  • the source mobility management network element obtains the identification list and address information of candidate mobility management network elements based on the identity of the second access device or the tracking area;
  • the source mobility management network element is based on The GUTI and the identity list of the candidate mobile management network element determine a target converged network device, where the target converged network device is a converged network device corresponding to one of the identities in the identity list of the candidate mobile management network element;
  • the source mobile The management network element is fused to the target according to the address information of the
  • Network device sends a request message, the request message for the terminal to switch to the fusion target network device.
  • the target converged network device in the access system integrates the functions of the mobile management network element in the first network and the functions of the mobile management network element in the second network, it not only reduces the network
  • the number of devices simplifies the workload of network operation and maintenance; it also reduces the network address resources and simplifies the complexity of network planning and deployment; moreover, it can flexibly adjust according to the traffic of the first network and the second network
  • the handover requirement received by the source mobility management network element in the first network from the first access device not only carries the identity of the second access device of the first network.
  • the identifier of the tracking area served by the second access device also carries the GUTI of the terminal in the second network, so that the source mobility management network element can obtain candidate mobility management according to the identity of the second access device or the identification of the tracking area.
  • the identification list and address information of the network element can be used to determine the target converged network device based on the GUTI and the candidate mobile management network element identification list, and then a request message can be sent to the target converged network device. The request message is used to switch the terminal to the target converged network.
  • the dual-registered terminal in a case where the dual-registered terminal has been switched to a converged network device in the second network, when the switching process is performed in the first network, the dual-registered terminal can also be successfully switched to the same converged network device.
  • this switching method it is possible to achieve the successful switching of dual-registered terminals on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the source mobility management network element determines the target converged network device according to the identity list of the GUTI and the candidate mobility management network element. Specifically, the source mobility management network element determines the first of the GUTIs. The mobile management identity is mapped to the mobile management identity in the first network; the source mobility management network element determines the converged network device corresponding to the identity of the mapped mobile management identity in the candidate mobility management network element identification list as The goal is to converge network equipment. Based on this solution, the source mobility management network element can determine the target converged network device.
  • the first network is a fourth-generation 4G network
  • the second network is a fifth-generation 5G network.
  • the first mobility management identifier is a globally unique access and mobility management function identifier.
  • GUAMI the mapped mobility management identifier is the globally unique mobility management entity identifier, GUMMEI. That is to say, based on this solution, the handover of dual registered terminals in a 4G network can be realized.
  • the first network is a 5G network
  • the second network is a 4G network
  • the first mobility management identifier is GUMMEI
  • the mapped mobility management identifier is GUAMI
  • a handover method includes: the first converged network device receives address information of the source mobility management network element from the source mobility management network element in the first network, and the terminal is in the second network.
  • the globally unique temporary identification GUTI wherein the first network and the second network are different types of networks; and the first converged network device determines that the terminal has passed through and can be a target in the first network according to the GUTI.
  • the second converged network device provided by the access device accesses the second network; the first converged network device sends the GUTI and the source mobility management to the second converged network device according to the address information of the second converged network device.
  • the address information of the network element where the GUTI and the address information of the source mobility management network element are used to switch the terminal to the second converged network device.
  • the converged network devices including the first converged network device and the second converged network device
  • the function of mobile management network elements not only reduces the number of devices in the network and simplifies the network operation and maintenance workload; it also reduces network address resources and simplifies the complexity of network planning and deployment; moreover, it can also be flexible According to the traffic of the first network and the second network, the occupation ratio of the hardware resources is adjusted, and the hardware resources are shared, thereby improving resource utilization efficiency and return on investment.
  • the first converged network device may receive address information of the source mobility management network element from the source mobility management network element in the first network and the GUTI of the terminal in the second network. And may determine, according to the GUTI of the terminal in the second network, that the terminal has accessed the second network through the second converged network device 402 that can provide services to the target access device in the first network, and then the first converged network device
  • the GUTI of the terminal in the second network and the address information of the source mobility management network element may be sent to the second converged network device, and the GUTI of the terminal in the second network and the address information of the source mobility management network element are used to switch the terminal to The second converged network device.
  • the dual-registered terminal in a case where the dual-registered terminal has been switched to a converged network device in the second network, when the switching process is performed in the first network, the dual-registered terminal can also be successfully switched to the same converged network device.
  • this switching method it is possible to achieve the successful switching of dual-registered terminals on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the first converged network device sends the GUTI and the address information of the source mobility management network element to the second converged network device according to the address information of the second converged network device, specifically: the The first converged network device sends the address information and instruction information of the second converged network device to the source mobility management network element, and the instruction information is used to instruct the source mobile management network element to the second converged network device according to the address information of the second converged network device.
  • the second converged network device sends address information of the GUTI and the source mobility management network element. That is, the first converged network device may be directed to the second converged network device through the source mobility management network element.
  • the first converged network device determines, according to the GUTI, that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network, Specifically, the first converged network device determines that the GUTI is not the GUTI allocated by the first converged network device; the first converged network device determines that the mobile management resource pool to which the mobile management network element that allocated the GUTI belongs and the first converged network When the device is the same mobile management resource pool as the mobile management network element in the second network, the first converged network device determines that the terminal has passed a second device that can provide services to the target access device in the first network. The converged network device accesses the second network. Based on this solution, the first converged network device may determine that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network.
  • the handover method further includes: obtaining, by the first converged network device, address information of the second converged network device according to the GUTI.
  • the first converged network device acquiring the address information of the second converged network device according to the GUTI, reference may be made to the second aspect described above, and details are not described herein again.
  • the first converged network device determines, according to the GUTI, that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network, Specifically: the first converged network device determines that the GUTI is not a GUTI allocated by the first converged network device; the first converged network device obtains address information of a target mobile management network element that allocates the GUTI to the terminal, and is capable of providing Address information of a candidate mobile management network element that the target access device in the first network provides services to; if the information of the target mobile management network element is in the address information of the candidate mobile management network element, the first converged network The device determines that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network; correspondingly, the switching method further includes: the first converged network device applies the The address information of the target mobility management network element is determined as the address information of the second converged network.
  • the first converged network device may determine that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network.
  • the first converged network device obtains address information of a candidate mobile management network element capable of providing services to a target access device in the first network. Specifically, the first converged network device receives information from The address information of the candidate mobility management network element of the source mobility management network element that can provide services to the target access device in the first network. The first converged network device obtains address information of a candidate mobile management network element capable of providing services to a target access device in the first network.
  • the first converged network device obtains address information of a candidate mobile management network element capable of providing services to a target access device in the first network. Specifically, the first converged network device receives information from The identity of the target access device of the source mobility management network element, or the identity of the tracking area served by the target access device; the first converged network device according to the identity of the target access device, or the target access device The identifier of the served tracking area obtains address information of a candidate mobile management network element that can provide services to a target access device in the first network. Based on this solution, the first converged network device obtains address information of candidate mobile management network elements that can provide services to target access devices in the first network.
  • an access device has a function of implementing the method described in the first aspect.
  • This function can be realized by hardware, and can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an access device including: a processor and a memory; the memory is configured to store a computer execution instruction, and when the access device is running, the processor executes the computer execution instruction stored in the memory to The access device is caused to execute the access method according to any one of the first aspects.
  • an access device including: a processor; the processor is configured to be coupled to the memory, and after reading an instruction in the memory, execute the instruction according to any one of the first aspects according to the instruction. Access method described above.
  • a computer-readable storage medium stores instructions that, when run on a computer, enable the computer to perform the access described in any one of the first aspects. method.
  • a computer program product containing instructions which, when run on a computer, enables the computer to execute the access method according to any one of the first aspects.
  • an apparatus for example, the apparatus may be a chip system
  • the apparatus includes a processor, and is configured to support an access device to implement a function involved in the first aspect, for example, according to the first mobile device.
  • a management identifier and when it is determined that there is no connection between the first mobility management network element and the access device, a target converged network device is determined according to the third mobility management identifier.
  • the device further includes a memory, which is used to store program instructions and data necessary for accessing the device.
  • the device is a chip system, it may be composed of a chip, or it may include a chip and other discrete devices.
  • the technical effects brought by any one of the design methods in the fifth aspect to the tenth aspect may refer to the technical effects brought by the different design methods in the first aspect, and are not repeated here.
  • a first converged network device has a function of implementing the method described in the second aspect or the fourth aspect.
  • This function can be realized by hardware, and can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • a first converged network device including: a processor and a memory; the memory is configured to store a computer execution instruction, and when the first converged network device is running, the processor executes the memory stored in the memory.
  • the computer executes instructions to cause the first converged network device to execute the access method according to any one of the second aspects or the handover method according to any one of the fourth aspects.
  • a first converged network device including: a processor; the processor is configured to be coupled to a memory and read an instruction in the memory, and then execute any of the foregoing second aspects according to the instruction.
  • the access method according to one item or the handover method according to any one of the fourth aspects.
  • a computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the connection according to any one of the second aspects. Method, or the switching method according to any one of the fourth aspects.
  • a computer program product containing instructions which, when run on a computer, enables the computer to execute the access method according to any one of the second aspect or any of the fourth aspect. Item.
  • an apparatus for example, the apparatus may be a chip system
  • the apparatus includes a processor, and is configured to support a first converged network device to implement the functions involved in the second or fourth aspect, For example, according to the GUTI, it is determined that a second converged network device connected to the terminal through the access device accesses the second network.
  • the apparatus further includes a memory, which is used to store program instructions and data necessary for the first converged network device.
  • the device is a chip system, it may be composed of a chip, or it may include a chip and other discrete devices.
  • a source mobility management network element has a function of implementing the method described in the third aspect above.
  • This function can be realized by hardware, and can also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • a source mobility management network element including: a processor and a memory; the memory is configured to store a computer execution instruction, and when the source mobility management network element is running, the processor executes the memory stored in the memory.
  • the computer executes instructions to cause the source mobility management network element to perform the handover method according to any one of the third aspects.
  • a source mobility management network element including: a processor; the processor is configured to be coupled to a memory and read an instruction in the memory, and then execute any of the third aspects according to the instruction according to the instruction.
  • a computer-readable storage medium has instructions stored thereon that, when run on a computer, enable the computer to perform the switching according to any one of the third aspects above. method.
  • a computer program product containing instructions which, when run on a computer, enables the computer to execute the switching method according to any one of the third aspects.
  • a device for example, the device may be a chip system
  • the device includes a processor for supporting a source mobility management network element to implement the functions involved in the third aspect, for example, according to The identifier of the second access device or the identifier of the tracking area is used to obtain the identifier list and address information of the candidate mobile management network element.
  • the device further includes a memory, which is configured to store program instructions and data necessary for the source mobility management network element.
  • the device is a chip system, it may be composed of a chip, or it may include a chip and other discrete devices.
  • the technical effects brought by any one of the design methods in the seventeenth aspect to the twenty-second aspect can refer to the technical effects brought by the different design methods in the third aspect, and will not be repeated here.
  • an access system includes a converged network device and an access device in a first network.
  • the access device is configured to receive an access request from a terminal.
  • the access request carries a first mobility management identifier and a third mobility management identifier, wherein the first mobility management identifier is an identifier of a first mobility management network element in the first network, and the third mobility management identifier is determined by the terminal.
  • the first mobile network and the second network are different types of networks obtained by mapping the mobile management identifier in the global unique temporary identifier GUTI in the second network to the mobile management identifier in the first network;
  • the access device is further configured to determine a target converged network according to the third mobility management identifier when it is determined that there is no connection between the first mobility management network element and the access device according to the first mobility management identifier.
  • the device and sends the access request to the target converged network device, where the target converged network device acts as a mobility management network element in the second network at the first
  • the mapped mobility management identifier in the network is the third mobility management identifier; the target converged network device is configured to receive the access request from the access device, and the access request is used by the terminal to connect through the target converged network device.
  • the first network Into the first network.
  • an access system includes: a first converged network device, a second converged network device, and an access device in a first network; the access device is configured to provide The first converged network device sends an access request, where the access request carries a globally unique temporary identifier GUTI of the terminal in a second network, where the first network and the second network are different types of networks; the first converged A network device, configured to receive the access request from the access device, and determine, according to the GUTI, that the terminal accesses the second network through a second converged network device connected through the access device; the first converged network The device is further configured to send the access request to the second converged network device; the second converged network device is configured to receive the access request from the first converged network device, and the access request is used by the terminal to pass The second converged network device accesses the first network.
  • a switching system in a twenty-fifth aspect, includes: a first access device in a first network, a source mobility management network element in the first network, and a target converged network device; the first An access device for sending a handover request to the source mobility management network element, the handover request carrying an identifier of a second access device of the first network or an identifier of a tracking area served by the second access device, and The globally unique temporary identifier GUTI of the terminal in the second network, wherein the first network and the second network are different types of networks; the source mobility management network element is configured to receive the The handover requirement, and according to the identity of the second access device or the identity of the tracking area, obtain the identity list and address information of the candidate mobility management network element; the source mobility management network element is further configured to use the GUTI and the candidate The identification list of the mobile management network element determines the target converged network device, where the target converged network device is one of the identifications in the identification list of the candidate mobile management network
  • a converged network device the source mobility management network element is further configured to send a request message to the target converged network device according to the address information of the target converged network device included in the address information of the candidate mobile management network element; the target converged network The device is further configured to receive the request message from the source mobility management network element, and the request message is used to switch the terminal to the target converged network device.
  • a switching system in a twenty-sixth aspect, includes: a first converged network device, a second converged network device, and a source mobility management network element in the first network; the source mobility management network element is configured to: Sending the address information of the source mobility management network element and the globally unique temporary identifier GUTI of the terminal in the second network to the first converged network device, wherein the first network and the second network are different types of networks;
  • the first converged network device is configured to receive address information of the source mobility management network element and the GUTI from the source mobility management network element, and determine, according to the GUTI, that the terminal has been able to pass through the terminal for the first network.
  • the second converged network device provided by the target access device accesses the second network; the first converged network device is further configured to send the GUTI to the second converged network device according to the address information of the second converged network device. And the address information of the source mobility management network element; the second converged network device is further configured to receive the GUTI and the source mobility management network from the first converged network device Address information, wherein the GUTI and the mobility management network element of the source address information of the convergence terminal switches to the second network device.
  • FIG. 1 is a first schematic architecture diagram of an access system according to an embodiment of the present application.
  • FIG. 2 is a second schematic architecture diagram of an access system according to an embodiment of the present application.
  • FIG. 3 is a first schematic architecture diagram of a switching system according to an embodiment of the present application.
  • FIG. 4 is a second schematic architecture diagram of a switching system according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an application of an access system or a switching system in a 4G network and a 5G network according to an embodiment of the present application;
  • FIG. 6 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of network deployment of an MME and an E-UTRAN device in an existing 4G network
  • FIG. 8 is a schematic diagram of an identifier of an E-UTRAN device and a format of a 4G-TAI in an existing 4G network;
  • FIG. 9 is a schematic diagram of network deployment of AMF network elements and NG-AN equipment in an existing 5G network
  • FIG. 10 is a schematic diagram of an identifier of an NG-AN device and a format of a 5G-TAI in an existing 5G network;
  • 11 is a schematic diagram of formats of GUMMEI and 4G-GUTI in an existing 4G network
  • FIG. 12 is a schematic diagram of formats of GUAMI and 5G-GUTI in an existing 5G network
  • FIG. 13 is a schematic diagram of the mapping between the existing GUMMEI and GUAMI;
  • FIG. 14 is a first schematic flowchart of an access method according to an embodiment of the present application.
  • FIG. 15 is a second schematic flowchart of an access method according to an embodiment of the present application.
  • FIG. 16 is a third flowchart of an access method according to an embodiment of the present application.
  • FIG. 17 is a fourth flowchart of an access method according to an embodiment of the present application.
  • FIG. 18 is a schematic flowchart of an access method according to an embodiment of the present application.
  • FIG. 19 is a schematic flowchart of an access method according to an embodiment of the present application.
  • FIG. 20 is a first schematic flowchart of a handover method according to an embodiment of the present application.
  • 21 is a second schematic flowchart of a handover method according to an embodiment of the present application.
  • FIG. 22 is a third flowchart of a handover method according to an embodiment of the present application.
  • FIG. 23 is a fourth flowchart of a handover method according to an embodiment of the present application.
  • FIG. 24 is a schematic flowchart of a handover method according to an embodiment of the present application.
  • FIG. 25 is a schematic flowchart of a handover method according to an embodiment of the present application.
  • FIG. 26 is a schematic structural diagram of an access device according to an embodiment of the present application.
  • FIG. 27 is a first schematic structural diagram of a first converged network device according to an embodiment of the present application.
  • FIG. 28 is a schematic structural diagram of a source mobility management network element according to an embodiment of the present application.
  • FIG. 29 is a second schematic structural diagram of a first converged network device according to an embodiment of the present application.
  • At least one or more of the following or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • at least one (a), a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish between the same or similar items having substantially the same functions and functions. Those skilled in the art can understand that the words “first”, “second” and the like do not limit the number and execution order, and the words “first” and “second” are not necessarily different.
  • the network architecture and service scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. With the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • terminals involved in the following embodiments of this application are dual-registered terminals.
  • the dual-registered terminals mean that they can be registered on different types of networks at the same time, but not between different types of networks.
  • the process of network reselection or switching is described here in a unified manner, and will not be repeated here.
  • the access system 10 includes a target converged network device 101 and an access device 102 in a first network.
  • the target converged network device 101 integrates the functions of the third mobility management network element 1011 in the first network and the functions of the fourth mobility management network element 1012 in the second network, and can be used as the third mobility in the first network.
  • the management network element 1011 may also be used as the fourth mobile management network element 1012 in the second network; wherein the first network and the second network are different types of networks, and are described here in a unified manner, which will not be described in detail below.
  • the access device 102 is configured to receive an access request from a terminal, where the access request carries a first mobility management identifier and a third mobility management identifier.
  • the first mobility management identifier is an identifier of a first mobility management network element in the first network
  • the third mobility management identifier is a globally unique temporary identity (GUTI) in the second network by the terminal.
  • the mobile management identifier mapped in the first network and obtained by the mobile management identifier mapping.
  • the access device 102 is further configured to determine the target converged network device 101 according to the third mobility management identifier when it is determined that there is no connection between the first mobility management network element and the access device 102 according to the first mobility management identifier. And sending an access request to the target converged network device 101, where when the target converged network device 101 is the fourth mobility management network element 1012 in the second network, the mapped mobility management identifier in the first network is the third mobility management logo.
  • the target converged network device 101 is configured to receive an access request from an access device, and the access request is used for a terminal to access the first network through the target converged network device 101.
  • the target converged network device 101 and the access device 102 in the embodiment of the present application may communicate directly with each other, or may communicate through the forwarding of other devices, which is not specifically limited in this embodiment of the present application.
  • the access system 20 includes: a first converged network device 201, a second converged network device 202, and a first network. ⁇ access ⁇ 203.
  • the first standard converged network device 201 integrates the functions of the third mobility management network element 2011 in the first network and the functions of the fourth mobility management network element 2012 in the second network, and can be used as the first
  • the three mobility management network elements 2011 can also be used as the fourth mobility management network element 2012 in the second network
  • the second standard fusion network device 202 integrates the functions of the fifth mobility management network element 2021 and the second in the first network.
  • the function of the sixth mobility management network element 2022 in the network may serve as the fifth mobility management network element 2021 in the first network, or may serve as the sixth mobility management network element 2022 in the second network; where the first network and The second network is a different type of network, and is described here in a unified manner, which will not be described in detail below.
  • the access device 203 is configured to send an access request to the first converged network device 201, where the access request carries a GUTI of the terminal in the second network.
  • the first converged network device 201 is configured to receive an access request from the access device 203 and determine, according to the GUTI, that the second converged network device 202 that the terminal used to connect through the access device 203 accesses the second network.
  • the first converged network device 201 is further configured to send an access request to the second converged network device 202.
  • the second converged network device 202 is configured to receive an access request from the first converged network device 201, and the access request is used for the terminal to access the first network through the second converged network device 202.
  • any two devices among the first converged network device 201, the second converged network device 202, and the access device 203 in the embodiment of the present application may communicate directly with each other, or may communicate through forwarding by other devices. This embodiment of the present application does not specifically limit this.
  • Device and second converged network device both integrate the functions of the mobile management network element in the first network and the functions of the mobile management network element in the second network, thus not only reducing the number of devices in the network, but also simplifying network operations Maintenance workload; and it also reduces network address resources and simplifies the complexity of network planning and deployment; moreover, it can flexibly adjust the occupation ratio of hardware resources according to the traffic of the first network and the second network, and share hardware Resources, thereby improving resource utilization efficiency and return on investment.
  • a converged network device in the access system such as a target converged network device in FIG. 1 or a first converged network in FIG. 2
  • Device and second converged network device both integrate the functions of the mobile management network element in the first network and the functions of the mobile management network element in the second network, thus not only reducing the number of devices in the network, but also simplifying network operations Maintenance workload; and it also reduces network address resources and simplifies the complexity of network planning and deployment; moreover, it can flexibly adjust the occupation ratio of hardware resources
  • the access request received by the access device in the first network not only carries the identifier of the first mobility management network element in the first network, but also Carry the mobile management identifier in the first network, which is obtained by mapping the mobile management identifier in the GUTI of the terminal in the second network, so that the access device determines the access device according to the first mobile management identifier
  • the target converged network device may be determined according to the third mobility management identifier.
  • the target converged network device serves as the fourth mobility management network element in the second network
  • the first converged network device corresponds to the first converged network device.
  • the mapped mobility management identifier in the network is the third mobility management identifier.
  • the access request sent by the access device in the first network to the first converged network device carries the terminal.
  • the GUTI in the second network allows the first converged network device to determine, according to the GUTI, that the second converged network device connected to the terminal through the access device accesses the second Network, whereby the first integration network device may send an access request to the second network convergence device, the access request for a terminal device via a second network access a first network convergence. That is, based on the access system provided in the embodiment shown in FIG. 1 or FIG.
  • the re-access of dual-registered terminals can be realized on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • a switching system 30 includes: a target converged network device 301, a first access device 302 in a first network, and a first network.
  • the source mobility management network element 303 in.
  • the target converged network device 301 integrates the functions of the third mobility management network element 3011 in the first network and the functions of the fourth mobility management network element 3012 in the second network, and can be used as the third mobility in the first network.
  • the management network element 3011 may also be used as the fourth mobility management network element 3012 in the second network; wherein the first network and the second network are different types of networks, and are described here in a unified manner, which will not be described in detail below.
  • the first access device 302 is configured to send a handover request to the source mobility management network element 303, where the handover request carries an identifier of a second access device of the first network or an identifier of a tracking area served by the second access device. , And the GUTI of the terminal in the second network.
  • the source mobility management network element 303 is configured to receive a handover request from the first access device 302, and obtain an identification list and address information of a candidate mobility management network element according to the identity of the second access device or the identity of the tracking area.
  • the source mobility management network element 303 is further configured to determine the target converged network device 301 according to the identity list of the GUTI and the candidate mobility management network element.
  • the target converged network device 301 is one of the identifiers in the identity list of the candidate mobility management network element.
  • the source mobility management network element 303 is further configured to send a request message to the target fusion network device 301 according to the address information of the target fusion network device 301 included in the address information of the candidate mobility management network element.
  • the target converged network device 301 is further configured to receive a request message from the source mobility management network element 303, where the request message is used to switch the terminal to the target converged network device 301.
  • the target converged network device 301, the first access device 302, and any two devices in the source mobility management network element 303 in the embodiments of the present application may communicate directly with each other, or may be communicated through forwarding by other devices. This embodiment of the present application does not specifically limit this.
  • the switching system 40 includes a first converged network device 401, a second converged network device 402, and a source mobile in the first network.
  • the first standard converged network device 401 integrates the functions of the third mobility management network element 4011 in the first network and the functions of the fourth mobility management network element 4012 in the second network, and can be used as the first mobility management network element 4012 in the first network.
  • the three mobility management network elements 4011 can also be used as the fourth mobility management network element 4012 in the second network; the second standard fusion network device 402 integrates the functions of the fifth mobility management network element 4021 and the second in the first network.
  • the function of the sixth mobility management network element 4022 in the network can be used as the fifth mobility management network element 4021 in the first network, or the sixth mobility management network element 4022 in the second network; where the first network and The second network is a different type of network, and is described here in a unified manner, which will not be described in detail below.
  • the source mobility management network element 403 is configured to send the address information of the source mobility management network element 403 and the GUTI of the terminal in the second network to the first converged network device 401.
  • the first converged network device 401 is configured to receive the address information of the source mobility management network element from the source mobility management network element 403 and the GUTI of the terminal in the second network, and according to the GUTI, determine that the terminal has passed through and can be the first network.
  • the second converged network device 402 provided by the target access device in the service accesses the second network;
  • the first converged network device is further configured to send, according to the address information of the second converged network device 402, the GUTI of the terminal in the second network and the address information of the source mobility management network element 403 to the second converged network device;
  • the second converged network device 402 is further configured to receive address information of the GUTI and the source mobility management network element 403 of the terminal in the second network from the terminal of the first converged network device, where the GUTI and the source mobile of the terminal in the second network are The address information of the management network element 403 is used to switch the terminal to the second converged network device 402.
  • any two devices in the first converged network device 401, the second converged network device 402, and the source mobility management network element 403 in the embodiment of the present application may communicate directly with each other, or may be forwarded by other devices. Communication, this embodiment of the present application does not specifically limit this.
  • the converged network devices in the switching system (such as the target converged network device in FIG. 3 or the first converged network device in FIG. 4 and The second converged network device) integrates the functions of the mobile management network element in the first network and the functions of the mobile management network element in the second network, thus not only reducing the number of devices in the network, but also simplifying network operation and maintenance. Workload; and it also reduces network address resources and simplifies the complexity of network planning and deployment; moreover, it can flexibly adjust the occupation ratio of hardware resources according to the traffic of the first network and the second network, and share hardware resources, So as to improve resource utilization efficiency and return on investment.
  • the handover received by the source mobility management network element in the first network from the first access device not only carries the second access of the first network.
  • the identifier of the device or the identifier of the tracking area served by the second access device also carries the GUTI of the terminal in the second network, so that the source mobility management network element can obtain the identifier of the second access device or the identifier of the tracking area.
  • the identification list and address information of the candidate mobile management network element can be used to determine the target converged network device based on the GUTI and the candidate mobile management network element identification list, and then a request message can be sent to the target converged network device. The request message is used to switch the terminal.
  • the first converged network device can receive the address information of the source mobile management network element from the source mobile management network element in the first network and the terminal in the first
  • the GUTI in the second network can be determined based on the GUTI of the terminal in the second network.
  • the second converged network device 402 provided by the access device accesses the second network, and the first converged network device can send the GUTI of the terminal in the second network and the address information of the source mobility management network element to the second converged network device.
  • the GUTI of the terminal in the second network and the address information of the source mobility management network element are used to switch the terminal to the second converged network device.
  • the switching system provided by the embodiment shown in FIG. 3 or FIG. 4 can achieve the successful switching of dual-registered terminals on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the first network in the embodiments shown in FIG. 1 to FIG. 4 may be a 4G network
  • the second network may be a 5G network
  • the first network in the embodiment of the present application may be a 5G network and the second
  • the network may be a 4G network
  • the first network and the second network in the embodiments of the present application may also be other networks, which are not specifically limited in the embodiments of the present application.
  • the integrated network device integrates 4G The functions of MME and AMF network elements in 5G network.
  • the corresponding access device is an evolved universal terrestrial radio access network (E-UTRAN) device in a 4G network; the converged network device serves as an AMF network element
  • the corresponding access device is a next-generation wireless access network (NG-AN) device in a 5G network.
  • NG-AN next-generation wireless access network
  • the converged network device may be, for example, a target converged network device in FIG. 1 or FIG. 3, or a first converged network device in FIG. 2 or FIG. 4, or a second converged network device in FIG. 2 or FIG. 4. This embodiment of the present application does not specifically limit this.
  • the access system or the switching system may further include one or more of an MME and an AMF network element, which is not specifically limited in this embodiment of the present application.
  • the network or entity corresponding to the source mobility management network element in FIG. 3 or FIG. 4 may be the MME in FIG. 5; or, in the first network When it is a 5G network and the second network is a 4G network, the network or entity corresponding to the source mobility management network element in FIG. 3 or FIG. 4 may be an AMF network element in FIG. 5, which is not specifically limited in this embodiment of the present application.
  • the converged network device in the implementation of this application is configured with "the local address of the unified peer network element interface".
  • the local address is used as the N14 interface address; in the case where the converged network device communicates with the AMF network element and the MME network element, the local address is used as the N26 interface Address; in the case where the converged network device communicates with the AMF network element as the MME, the local address is used as the N26 interface address; in the case where the converged network device communicates with the MME and the MME, the local address is used as the S10 interface address.
  • the converged network device is configured with "unified local address of wireless device interface".
  • the local address is used as the N2 interface address; in the case where the converged network device communicates with the E-UTRAN device as the MME, the local address is used as S1- MME interface address.
  • the E-UTRAN device can also communicate with the MME through the S1-MME interface, and the NG-AN device can also communicate with the AMF network element through the N2 interface.
  • the MME can also communicate with the MME through the S1-MME interface
  • the NG-AN device can also communicate with the AMF network element through the N2 interface.
  • FIG. 5 is only an example, and an access system or a switching system includes a converged network device as an example for description.
  • the access system or the switching system may include one or more converged network devices, which are not specifically limited in this embodiment of the present application.
  • FIG. 5 is only an example for description with a converged network device as an MME connected to an E-UTRAN device as an example.
  • the converged network device may be connected to one or more E-UTRAN devices when the MME is used, which is not specifically limited in this embodiment of the present application.
  • FIG. 5 is only an example for description in which a converged network device is used as an MME and is connected to an AMF network element or an MME as an example.
  • the converged network device may be connected to one or more MMEs when it is an MME, or the converged network device may be connected to one or more AMF network elements when it is an MME, which is not specifically limited in this embodiment of the present application.
  • FIG. 5 is only an example for description with a converged network device as an AMF network element connected to an NG-AN device as an example.
  • the converged network device can be connected to one or more NG-AN devices, which is not specifically limited in this embodiment of the present application.
  • FIG. 5 is only an example for description by taking an example in which a converged network device is connected to an AMF network element or an MME as an AMF network element.
  • the converged network device may be connected to one or more MMEs when it is an AMF network element, or the converged network device may be connected to one or more AMF network elements when it is an AMF network element, which is not specifically limited in this embodiment of the present application.
  • FIG. 5 is only an example for description by taking an E-UTRAN device connected to a converged network device as an example.
  • the E-UTRAN device may also be connected to other converged network devices or MMEs, which is not specifically limited in the embodiment of the present application.
  • FIG. 5 is only an example for description by taking the connection between an NG-AN device and a converged network device as an example.
  • the NG-AN device can also be connected to other converged network devices or AMF network elements, which is not specifically limited in the embodiment of the present application.
  • the terminals involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem; Including subscriber unit, cellular phone, smart phone, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld device (handheld), laptop (computer), cordless phone (wireless local phone) or wireless local loop (WLL) station, machine type communication (MTC) terminal, user equipment (user equipment) , UE), mobile station (MS), terminal device (terminal device) or relay user equipment.
  • the relay user equipment may be, for example, a 5G residential gateway (RG).
  • RG 5G residential gateway
  • the access device refers to a device that accesses the core network.
  • the access device may be a base station or a broadband network service gateway (broadband). network gateway (BNG), aggregation switches, non-third-generation partnership project (3rd generation partnership project, 3GPP) access equipment, etc.
  • BNG broadband network service gateway
  • the base station may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, and the like.
  • the access device in FIG. 1, the first converged network device in FIG. 2, the source mobility management network element in FIG. 3, or the first converged network device in FIG. 4 may be implemented by one device. It can also be implemented by multiple devices together, or it can be a functional module in one device, which is not specifically limited in the embodiment of the present application. It can be understood that the foregoing functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (for example, a cloud platform).
  • FIG. 6 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.
  • the communication device 600 includes a processor 601, a communication line 602, a memory 603, and one or more communication interfaces (FIG. 6 is only exemplarily described by using the communication interface 604).
  • the processor 601 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the program of the solution of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 602 may include a path for transmitting information between the aforementioned components.
  • the communication interface 604 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 603 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc (read-only memory, CD-ROM) or other optical disk storage, optical disk storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory may exist independently, and is connected to the processor through the communication line 602. The memory can also be integrated with the processor.
  • the memory 603 is configured to store a computer execution instruction for executing the solution of the present application, and the processor 601 controls execution.
  • the processor 601 is configured to execute computer execution instructions stored in the memory 603, so as to implement the access method or the switching method provided in the following embodiments of the present application.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
  • the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 6.
  • the communication device 600 may include multiple processors, such as the processor 601 and the processor 608 in FIG. 6. Each of these processors may be a single-CPU processor or a multi-CPU processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the communication device 600 may further include an output device 605 and an input device 606.
  • the output device 605 communicates with the processor 601 and can display information in a variety of ways.
  • the output device 605 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait.
  • the input device 606 is in communication with the processor 601 and can receive user input in a variety of ways.
  • the input device 606 may be a mouse, a keyboard, a touch screen device, or a sensing device.
  • the aforementioned communication device 600 may be a general-purpose device or a special-purpose device.
  • the communication device 600 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device having a similar structure in FIG. 6. device.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 600.
  • the identity of the E-UTRAN device in the 4G network and the tracking area identity (TAI) (hereinafter referred to as 4G-TAI) served by the E-UTRAN device in the 4G network:
  • each MME is connected to multiple E-UTRAN devices.
  • These E-UTRAN devices cover a group of tracking areas (TAs), indicating the coverage area of a 4G wireless network.
  • TAs tracking areas
  • MME11 can be connected to E-UTRAN11 and E-UTRAN12 devices, respectively
  • MME12 can be connected to E-UTRAN11 and E-UTRAN12 devices, among which E-UTRAN11 and E-UTRAN12 devices, etc. It can cover location area 1, which includes TA11, TA12, ... TA1n.
  • MME21 can be connected to E-UTRAN21 and E-UTRAN22, respectively.
  • MME22 can be connected to E-UTRAN21 and E-UTRAN22, respectively.
  • E-UTRAN21 and E-UTRAN22 can cover location area 2, location area, etc. 2 includes TA21, TA22, ... TA2m. Where m and n are integers.
  • 4G-TAI the globally unique identifier of 4G-TA is called 4G-TAI, and its composition structure is shown in Fig. 8, including mobile country code (MCC) and mobile network code (MNC), and 16-bit Tracking area code (TAC).
  • MCC mobile country code
  • MNC mobile network code
  • TAC 16-bit Tracking area code
  • MCC identifies the country to which the operator belongs
  • MNC is the network identifier of the operator
  • TAC uniquely identifies a location area under MCC + MNC.
  • the identity of the E-UTRAN device can be described as a global (enodeB, eNB) identifier (ID). Its composition structure is shown in Figure 8, including MCC, MNC, and 18-bit, 20-bit, 21-bit, or 28-bit ENB ID. Among them, MCC identifies the country to which the operator belongs; MNC is the network identifier of the operator; eNB ID uniquely identifies an E-UTRAN device under MCC + MNC.
  • 5G-TAI the identity of the NG-AN equipment in the 5G network and the TAI served by the NG-AN equipment in the 5G network
  • each AMF network element is connected to multiple NG-AN devices. These NG-AN devices cover a group of TAs, indicating the coverage area of a 5G wireless network.
  • AMF11 network elements can be connected to NG-AN11 equipment and NG-AN12 equipment, respectively, and AMF12 network elements can be connected to NG-AN11 equipment and NG-AN12 equipment, of which NG-AN11 equipment and NG -AN equipment can cover location area 1, location area 1 includes TA11, TA12, ... TA1n.
  • AMF21 network elements can be connected to NG-AN21 equipment and NG-AN22 equipment, respectively.
  • AMF22 network elements can be connected to NG-AN21 equipment and NG-AN22 equipment, respectively. Among them, NG-AN21 equipment and NG-AN22 equipment can cover the location area. 2. Location area 2 includes TA21, TA22, ... TA2m.
  • 5G-TAI the globally unique identifier of 5G-TA is called 5G-TAI, and its composition structure is shown in FIG. 10, including MCC and MNC, and 24-bit TAC.
  • MCC identifies the country to which the operator belongs
  • MNC is the network identifier of the operator
  • TAC uniquely identifies a location area under MCC + MNC.
  • the identification of the NG-AN device can be recorded as the global AN device ID. Its composition structure is shown in FIG. 10, including the MCC, MNC, and 18-32-bit AN device ID. Among them, MCC identifies the country to which the operator belongs; MNC is the network identification of the operator; AN device ID uniquely identifies an NG-AN device.
  • 4G-TAC is 8 bits less than 5G-TAC, which is one byte; the length range of the global eNB ID of the 4G network and the global AN device ID of the 5G network are different.
  • GUMMEI and 4G-GUTI in a 4G network are shown in Figure 11.
  • GUMMEI is composed of MCC and MNC corresponding to MME, 16-bit MME group ID, and 8-bit MME code.
  • 4G-GUTI is composed of GUMMEI and a 32-bit MME temporary mobile subscriber identity (M-TMSI).
  • MCC identifies the country to which the operator belongs; MNC is the network identifier of the operator; MME group ID represents a group of MMEs serving the same tracking area (TA) range. This group of MMEs is also called MME Pool (MME) pool; MME code uniquely identifies an MME in the MME pool. Among them, the MME group ID and the MME code are called MME identifier (MMEI), which is unique under a group of MCC and MNC.
  • MME MME identifier
  • GUIAMI globally unique AMF identifier
  • 5G-GUTI 5G-GUTI
  • GUAMI The format of GUAMI and 5G-GUTI in 5G network is shown in Figure 12.
  • GUAMI consists of MCC and MNC corresponding to AMF network elements, 8-bit AMF region identifier (AMF region ID), 10-bit AMF set identifier (AMF region ID), and 6-bit AMF pointer (AMF pointer).
  • 5G-GUTI consists of GUAMI and 32-bit 5G-TMSI.
  • MCC identifies the country to which the operator belongs; MNC is the network identifier of the operator; the combination of AMF region ID and AMF set ID indicates a group of AMF network elements serving the same TA range. This group of AMF network elements also It is called AMF pool (AMF pool); the combination of AMF region ID, AMF ID and AMF pointer is called AMF identifier (AMI), which is unique under a group of MCC and MNC.
  • AMF region ID is unique under a group of MCC and MNC, and AMF region ID is unique under AMF region ID.
  • mapping method between GUAMI and GUMMEI currently defined by the 3GPP protocol is as follows:
  • the MCC in GUAMI is mapped to MCC in GUMMEI, and the MNC in GUAMI is mapped to MNC in GUMMEI; the AMF area identifier in GUAMI is mapped to the upper 8 bits of the MME group identifier in GUMMEI; and the higher 8 bits in the AMF set identifier in GUAMI
  • the bit mapping is the lower 8 bits of the MME group identifier in GUMMEI; the lower 2 bits in the AMF set identifier in GUAMI are mapped to the upper 2 bit of the MME code in GUMMEI; the AMF pointer in GUAMI is mapped to the MME code in GUMMEI Lower 6bit.
  • the mapping result is shown in FIG. 13.
  • the first network in the access system shown in FIG. 1 is a 4G network
  • the second network is a 5G network.
  • the E-UTRAN device can ensure that the correct converged network device is selected for dual-registered terminals for processing.
  • this embodiment provides an access method.
  • the access method includes the following steps:
  • the E-UTRAN device sends an S1 setup request (S1 setup request) message to the converged network device, so that the converged network device receives the S1 setup request message from the E-UTRAN device.
  • S1 setup request S1 setup request
  • the S1 setup request message is used to request registration to a converged network device.
  • the converged network device sends an S1 setup response (S1 setup response) message to the E-UTRAN device, so that the E-UTRAN device receives the S1 setup response message from the converged network device.
  • S1 setup response S1 setup response
  • the S1 setup response message carries two sets of GUMMEI.
  • a group of GUMMEI is the corresponding GUMMEI when the converged network device is used as the MME, and is recorded as the native GUMMEI, which represents the 4G network device; a group of GUMMEI is obtained from the native GUAMI mapping corresponding to the converged network device as the AMF network element.
  • GUMMEI referred to as mapped GUMMEI, represents 5G network equipment.
  • the AMF pool and the MME pool in the network may be independently planned. For example, configure the original GUAMI and original GUMMEI to which the converged network device belongs respectively.
  • the original GUMMEI corresponding to the converged network device as the MME and the original GUAMI corresponding to the converged network device as the AMF network element may also be obtained through other methods, for example, one or more globally unique devices may be configured for the converged network device.
  • Identification, the original GUAMI and the original GUMMEI may be obtained from one or more globally unique identification mappings corresponding to the converged network device, which is not specifically limited in this embodiment of the present application.
  • mapping GUMMEI obtained by mapping the original GUAMI according to the prior art in the embodiment of the present application is not the same as the GUMMEI of any MME in the network, nor is it the GUMMEI obtained by mapping the original GUAMI of other AMF network elements in the network according to the existing technology The same description will be given here and will not be repeated here.
  • different GUMMEIs in a group of GUMMEIs may belong to one MME pool, that is, the MCC, MNC, and MME group identifiers are the same; or they may belong to multiple MME pools, that is, MCC, MNC, or MME group ID One or more of them are different, which is not specifically limited in the embodiment of the present application.
  • the S1 establishment response message may further carry weight information corresponding to the converged network device as the MME, and the weight information may be determined according to the converged network device weight information, for example, the converged network device
  • the weight information is mapped to the weight information corresponding to the converged network device as the MME according to a certain ratio, which is not specifically limited in this embodiment of the present application.
  • the weight information of the converged network device represents the processing capability of the converged network device in the converged network device pool to which the converged network device belongs compared to other converged network devices.
  • the E-UTRAN device interacts with one of the connected converged network devices to obtain two sets of GUMMEI corresponding to the converged network device.
  • the E-UTRAN device can also be connected to other converged network devices or MMEs.
  • MMEs converged network devices or MMEs.
  • the E-UTRAN device may feedback according to the one or more converged network devices or MMEs connected to the E-UTRAN device.
  • the original GUMMEI determines the following network topology relationships:
  • the number of MME pools to which the E-UTRAN device is connected and the MCC, MNC, and MME group IDs corresponding to each MME pool.
  • the terminal sends an attach / tracking area update (TAU) request message to the E-UTRAN device, so that the E-UTRAN device receives the attach / TAU request message from the terminal.
  • TAU tracking area update
  • the body of the attach / TAU request message does not contain the original (old) GUTI, and the header of the old MME does not have the GUMMEI assigned the old GUTI; if the terminal has previously been removed from the 4G network If it is accessed, the message body of the attach / TAU request message includes the old 4G-GUTI allocated by the old MME in the originally accessed 4G network as the old GUTI, and the 4G-GUTI includes the old MME allocated by the 4G-GUTI. GUMMEI, recorded as the first GUMMEI. In addition, the header of the attach / TAU request message includes the first GUMMEI.
  • the attach / TAU request message further includes a 4G network mapped by the GUAMI in the 5G-GUTI according to the mapping method shown in FIG. 12
  • the third GUMMEI the attach / TAU request message.
  • the E-UTRAN device determines that the old MME corresponding to the first GUMMEI is not connected to the E-UTRAN device according to the first GUMMEI, the E-UTRAN device determines that the target converged network device is the one shown in FIG. 14 according to the third GUMMEI. Converged network equipment.
  • the E-UTRAN device After receiving the attach / TAU request message, the E-UTRAN device compares the information in the header of the attach / TAU request message with the GUMMEI of each MME connected to itself that was previously saved, and judges the old access that the terminal originally accessed. Whether the MME is connected to itself. If there is a connection, the old MME is selected to reconnect; otherwise, the E-UTRAN device determines the target converged network device according to the third GUMMEI.
  • the embodiment of the present application exemplifies that the old MME has no connection with the E-UTRAN device, and the E-UTRAN device determines that the mapping GUMMEI fed back by the fusion network device in step S1402 includes a third GUMMEI, so that the target fusion network device is determined as FIG. 14
  • the converged network device in the example is used for description. That is, in the embodiment of the present application, the mapping GUMMEI in the 4G network corresponding to the target converged network device as the AMF network element in the 5G network is the third GUMMEI.
  • the E-UTRAN device sends an attach / TAU request message to the converged network device, so that the converged network device receives the attach / TAU request message from the E-UTRAN device.
  • the identifier of the E-UTRAN device or the service served by the E-UTRAN device may be added to the message header of the attach / TAU request message.
  • the identification of the tracking area please refer to the existing implementation for details, and it will not be repeated here.
  • the identifier of the E-UTRAN device and the identifier of the tracking area served by the E-UTRAN device reference may be made to the embodiment shown in FIG. 8, and details are not described herein again.
  • the converged network device sends an attach / TAU accept message to the E-UTRAN device, so that the E-UTRAN device receives the attach / TAU accept message from the converged network device.
  • the attach / TAU acceptance message carries a newly allocated 4G-GUTI, and the newly allocated 4G-GUTI can be uniquely associated with a context of a terminal accessed from a 4G network.
  • the E-UTRAN device sends an attach / TAU accept message to the terminal, so that the terminal receives the attach / TAU accept message from the E-UTRAN device.
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the E-UTRAN device in the above steps S1401 to S1407 can be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, and this embodiment of the present application does not make any limit.
  • the first network in the access system shown in FIG. 1 is a 5G network
  • the second network is a 4G network.
  • the NG-AN device can ensure that the correct converged network device is selected for dual-registered terminals for processing.
  • this is another access method provided in the embodiment of the present application.
  • the access method includes the following steps:
  • the NG-AN device sends an NG setup request (NG setup request) message to the converged network device, so that the converged network device receives the NG setup request message from the NG-AN device.
  • NG setup request NG setup request
  • the NG establishment request message is used to request registration to a converged network device.
  • the converged network device sends an NG setup response (NG setup response) message to the NG-AN device, so that the NG-AN device receives the NG setup response message from the converged network device.
  • NG setup response NG setup response
  • the NG establishment response message carries two sets of GUAMI.
  • a group of GUAMI is a GUAMI corresponding to a converged network device as an AMF network element, and is recorded as an original GUAMI, which represents a 5G network device.
  • a group of GUAMIs is a GUAMI mapped from the original GUMMEI corresponding to a converged network device as an MME network element, and is recorded. Mapping GUAMI represents 4G network equipment.
  • the AMF pool and the MME pool in the network may be independently planned. For example, configure the original GUAMI and original GUMMEI to which the converged network device belongs respectively.
  • the original GUMMEI corresponding to the converged network device as the MME and the original GUAMI corresponding to the converged network device as the AMF network element may also be obtained through other methods, for example, one or more globally unique devices may be configured for the converged network device.
  • Identification, the original GUAMI and the original GUMMEI may be obtained from one or more globally unique identification mappings corresponding to the converged network device, which is not specifically limited in this embodiment of the present application.
  • mapping GUAMI obtained by mapping the original GUMMEI according to the prior art in the embodiment of the present application is not the same as the GUAMI of any MME in the network, nor is it the same as the GUAMI obtained by mapping the original GUMMEI of other MMEs according to the existing technology. It is unified here and will not be described in detail below.
  • different GUAMIs in a group of GUAMIs may belong to one AMF pool, that is, MCC, MNC, AMF region ID, and AMF set ID are all the same; or may belong to multiple AMF pools, that is, MCC, MNC One or more of the AMF region ID and the AMF region ID are different, which is not specifically limited in the embodiment of the present application.
  • the NG establishment response message may further carry weight information corresponding to the fusion network device as an AMF network element, and the weight information may be determined according to the weight information of the fusion network device, for example, fusion
  • the weight information of the network device is mapped to the weight information corresponding to the converged network device as an AMF network element according to a certain ratio, which is not specifically limited in the embodiment of the present application.
  • the weight information of the converged network device represents the processing capability of the converged network device in the converged network device pool to which the converged network device belongs compared to other converged network devices.
  • steps S1501-S1502 are optional steps, and are merely exemplary.
  • the NG-AN device interacts with one of the connected converged network devices to obtain two sets of GUAMI corresponding to the converged network device.
  • the NG-AN device can also be connected to other converged network devices or AMF network elements.
  • steps S1501-S1502 For the manner of interacting with other converged network devices to obtain the two sets of GUAMI corresponding to the converged network device, refer to steps S1501-S1502 above; and
  • the AMF network element interacts to obtain the original GUAMI corresponding to the AMF network element, reference may be made to the existing technology, and details are not described herein again.
  • the NG-AN device may according to the one or more converged network devices connected to the NG-AN device or The original GUAMI feedback from the AMF network element determines the following network topology relationships:
  • the number of AMF pools to which the NG-AN device is connected and the MCC, MNC, AMF region ID, and AMF set ID corresponding to each AMF pool.
  • the terminal sends a registration request (registration request) message to the NG-AN device, so that the NG-AN device receives the registration request message from the terminal.
  • the message body of the registration request message does not contain the original (old) GUTI, and there is no GUAMI of the old AMF network element of old GUTI allocated in the message header; if the terminal has previously been removed from the 5G network
  • the message body of the registration request message includes the old 5G-GUTI allocated by the old AMF network element in the originally accessed 5G network as the old GUTI, and the 5G-GUTI includes the old AMF network allocated the 5G-GUTI. Yuan's GUAMI, recorded as the first GUAMI.
  • the header of the registration request message includes the first GUAMI.
  • the registration request message also carries the 5G network mapping obtained by the GUMMEI in the 4G-GUTI according to the mapping method shown in FIG. 12.
  • the third GUAMI is the third GUAMI.
  • the NG-AN device determines that the old AMF network element corresponding to the first GUAMI is not connected to the NG-AN device according to the first GUAMI, the NG-AN device determines that the target converged network device is the FIG. 15 according to the third GUAMI. Converged network equipment.
  • the NG-AN device compares the information in the header of the registration request message with the GUAMI of each AMF network element that it has previously connected to determine the old AMF network that the terminal originally accessed. Does Yuan have a connection with himself. If there is a connection, the old AMF network element is selected to reconnect; otherwise, the NG-AN device determines the target converged network device according to the third GUAMI.
  • the embodiment of the present application exemplifies that the old AMF network element is not connected to the NG-AN device.
  • the NG-AN device determines that the mapping GUAMI of the feedback of the fusion network device in step S1502 includes a third GUAMI, thereby determining that the target fusion network device is
  • the converged network device in FIG. 15 is taken as an example for description. That is, in the embodiment of the present application, when the target converged network device serves as the MME in the 4G network, the mapping GUAMI in the 5G network is the third GUAMI.
  • the NG-AN device sends a registration request message to the converged network device, so that the converged network device receives the registration request message from the NG-AN device.
  • the identifier of the NG-AN device or the trace served by the NG-AN device may be added to the message header of the registration request message
  • the identification of the area please refer to the existing implementation manner, and it will not be repeated here.
  • the identifier of the NG-AN device and the identifier of the tracking area served by the NG-AN device reference may be made to the embodiment shown in FIG. 10, and details are not described herein again.
  • the converged network device sends a registration acceptance message to the NG-AN device, so that the NG-AN device receives the registration acceptance message from the converged network device.
  • the registration acceptance message carries a newly allocated 5G-GUTI, and the newly allocated 5G-GUTI can be uniquely associated with a context of a terminal accessed from a 5G network.
  • the NG-AN device sends a registration acceptance message to the terminal, so that the terminal receives the registration acceptance message from the NG-AN device.
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the NG-AN device in the above steps S1501 to S1507 can be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, and this embodiment of the present application does not do anything about this. limit.
  • the first network in the access system shown in FIG. 2 is a 4G network
  • the second network is a 5G network.
  • the E-UTRAN device does not improve the selection algorithm of the MME, and cannot guarantee that the dual-registered terminal can be selected.
  • a correct converged network device performs processing.
  • this embodiment provides an access method. The access method includes the following steps:
  • S1601a-S1602a are similar to steps S1401-S1402 in the embodiment shown in FIG. 14, except that the converged network device in steps S1401-S1402 is replaced with the first converged network device in the embodiment of the present application; step S1401 -The S1 setup request message in S1402 is replaced with the S1 setup request message 1 in the embodiment of this application; the S1 setup response message in steps S1401-S1402 is replaced with the S1 setup request response 1 in the embodiment of this application; the rest of the related description Reference may be made to the embodiment shown in FIG. 14, and details are not described herein again.
  • S1601b-S1602b are similar to steps S1401-S1402 in the embodiment shown in FIG. 14, except that the converged network device in steps S1401-S1402 is replaced by the second converged network device in the embodiment of the present application; step S1401 -Replace the S1 setup request message in S1402 with the S1 setup request message 2 in the embodiment of this application; replace the S1 setup response message in steps S1401-S1402 with the S1 setup request response 2 in the embodiment of this application; the remaining related descriptions Reference may be made to the embodiment shown in FIG. 14, and details are not described herein again.
  • the terminal sends an attach / TAU request message to the E-UTRAN device, so that the E-UTRAN device receives the attach / TAU request message from the terminal.
  • the body of the attach / TAU request message does not contain the original (old) GUTI, and the header of the old MME does not have the GUMMEI assigned the old GUTI; if the terminal has previously been removed from the 4G network If it is accessed, the message body of the attach / TAU request message includes the old 4G-GUTI allocated by the old MME in the originally accessed 4G network as the old GUTI, and the 4G-GUTI includes the old MME allocated by the 4G-GUTI. GUMMEI, recorded as the first GUMMEI. In addition, the header of the attach / TAU request message includes the first GUMMEI.
  • the attach / TAU request message also carries the 5G-GUTI.
  • the E-UTRAN device selects the first converged network device to provide services for the terminal.
  • the E-UTRAN device can select the MME pool that is allowed to access through a certain algorithm among various converged network devices connected to the E-UTRAN device according to factors such as wireless neighbors, and then pass a certain The algorithm selects a suitable converged network device in the MME pool to provide services for the terminal.
  • a suitable converged network device in the MME pool to provide services for the terminal.
  • the E-UTRAN device sends an attach / TAU request message to the first converged network device, so that the first converged network device receives the attach / TAU request message from the E-UTRAN device.
  • step S1605 For the implementation of step S1605, refer to step S1405, and details are not described herein again.
  • the first converged network device determines that the 5G-GUTI is not allocated by the first converged network device.
  • the first converged network device determines that the AMF pool to which the AMF network element of the 5G-GUTI is allocated is the same as the AMF pool to which the first converged network device belongs as the AMF network element in the 5G network, and the first converged network device determines the terminal.
  • the second converged network device that was connected through the E-UTRAN device accesses the 5G network.
  • the first converged network device determines that the 5G-GUTI is allocated by the first converged network device; or if the first converged network device determines that the AMF network element to which the 5G-GUTI is allocated belongs to the AMF
  • the pool is different from the AMF pool to which the first converged network device belongs as the AMF network element in the 5G network, and can be processed according to the existing terminal's attach / TAU process in the 4G network. This embodiment of the present application does not specifically address this. limited.
  • the attach / TAU request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method one including the following steps S1608a-S1609a:
  • the first converged network device sends a rerouting request message to the E-UTRAN device, so that the E-UTRAN device receives the rerouting request message from the first converged network device.
  • the rerouting request message includes the mapping GUMMEI in the 4G network obtained from the GUAMI mapping in the 5G-GUTI and the above-mentioned attach / TAU request message.
  • the rerouting request message in the embodiment of the present application may be, for example, a rerouting non-access stratum (NAS) message request (reroute, NAS, message, request) message, which is not specifically limited in this embodiment of the present application. .
  • NAS non-access stratum
  • the E-UTRAN device sends an attach / TAU request message to the second converged network device corresponding to the mapped GUMMEI according to the mapping GUMMEI in the rerouting request message, so that the second converged network device receives the attach / TAU from the E-UTRAN device.
  • TAU request message the attach / TAU request message.
  • the second method includes the following steps S1608b-S1610b:
  • the first converged network device sends a DNS query request (DNS query request) message to a domain name system (DNS) server, so that the DNS server receives the DNS query request message from the first converged network device.
  • DNS query request message carries the mapping GUMMEI in the 4G network obtained by the GUAMI mapping in the 5G-GUTI, and is used to query the address information of the second converged network device.
  • the first converged network device may construct a fully qualified domain name (FQDN) of the MME according to the mapping GUMMEI in the 4G network obtained from the GUAMI mapping in the 5G-GUTI, and use the MME
  • the FQDN is carried in a DNS query request message to query the address information of the second converged network device.
  • the format of the MMEFQDN is as follows, which contains the mapping GUMMEI information:
  • the DNS server sends a DNS query response (DNS query response) message to the first converged network device, so that the first converged network device receives a DNS query response message from the DNS server.
  • DNS query response message carries address information of the second converged network device.
  • the first converged network device sends an MME reroute NAS message request message to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the message from the first
  • the MME of the converged network device reroutes the NAS message request message.
  • the MME rerouting NAS message request message carries the above attach / TAU request message.
  • the third method includes the following steps S1608c-S1610c:
  • the first converged network device sends a discovery request (discovery request) message to a network discovery function (NRF) network element, so that the NRF network element receives the discovery request message from the first converged network device.
  • a discovery request discovery request
  • NRF network discovery function
  • the discovery request message carries the GUAMI in the 5G-GUTI and is used to query the address information of the second converged network device.
  • the NRF network element sends a discovery response (discovery response) message to the first converged network device, so that the first converged network device receives the discovery response message from the NRF network element.
  • the discovery response message carries address information of the second converged network device.
  • the first converged network device sends an N1 message notification (N1 message) to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the N1 message from the first converged network device.
  • N1 message notification carries the above-mentioned attach / TAU request message.
  • the access method provided in the embodiment of the present application further includes the following steps S1611-S1612:
  • the second converged network device sends an attach / TAU accept message to the E-UTRAN device, so that the E-UTRAN device receives the attach / TAU accept message from the second converged network device.
  • the attach / TAU acceptance message carries a newly allocated 4G-GUTI, and the newly allocated 4G-GUTI can be uniquely associated with a context of a terminal accessed from a 4G network.
  • the E-UTRAN device sends an attach / TAU accept message to the terminal, so that the terminal receives the attach / TAU accept message from the E-UTRAN device.
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the first converged network device in the above steps S1601a to S1612 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the access system shown in FIG. 2 is a 5G network
  • the second network is a 4G network.
  • the NG-AN device does not improve the selection algorithm of the AMF network element and cannot be guaranteed as a dual-registered terminal.
  • a correct converged network device is selected for processing.
  • this embodiment provides an access method.
  • the access method includes the following steps:
  • S1701a-S1702a are similar to steps S1501-S1502 in the embodiment shown in FIG. 15, except that the converged network device in steps S1501-S1502 is replaced by the first converged network device in the embodiment of the present application; step S1501 -Replace the NG establishment request message in S1502 with the NG establishment request message 1 in the embodiment of the present application; replace the NG establishment response message in steps S1501-S1502 with the NG establishment request response 1 in the embodiment of the present application; the rest of the related description Reference may be made to the embodiment shown in FIG. 15, and details are not described herein again.
  • S1701b-S1702b are similar to steps S1501-S1502 in the embodiment shown in FIG. 15, except that the converged network device in steps S1501-S1502 is replaced by the second converged network device in the embodiment of the present application; step S1501 -Replace the NG establishment request message in S1502 with the NG establishment request message 2 in the embodiment of the present application; replace the NG establishment response message in steps S1501-S1502 with the NG establishment request response 2 in the embodiment of the present application; the rest of the related description Reference may be made to the embodiment shown in FIG. 15, and details are not described herein again.
  • the terminal sends a registration request message to the NG-AN device, so that the NG-AN device receives the registration request message from the terminal.
  • the message body of the registration request message does not contain the original (old) GUTI, and there is no GUAMI of the old AMF network element of old GUTI allocated in the message header; if the terminal has previously been removed from the 5G network
  • the message body of the registration request message includes the old 5G-GUTI allocated by the old AMF network element in the originally accessed 5G network as the old GUTI, and the 5G-GUTI includes the old AMF network allocated the 5G-GUTI. Yuan's GUAMI, recorded as the first GUAMI.
  • the header of the registration request message includes the first GUAMI.
  • the registration request message also carries the 4G-GUTI.
  • the NG-AN device selects the first converged network device to provide services to the terminal.
  • the NG-AN device can select the AMF pool that it is allowed to access through a certain algorithm among various converged network devices connected to the NG-AN device according to factors such as wireless neighbors, and then pass a certain The algorithm selects a suitable converged network device in the AMF pool to provide services to the terminal.
  • the existing NG-AN device to select the AMF network element to provide services to the terminal, which will not be repeated here.
  • the NG-AN device sends a registration request message to the first converged network device, so that the first converged network device receives the registration request message from the NG-AN device.
  • step S1705 For the implementation of step S1705, refer to step S1505, and details are not described herein again.
  • the first converged network device determines that the 4G-GUTI is not allocated by the first converged network device.
  • the first converged network device determines that the MME to which the MME that allocates the 4G-GUTI belongs is the same as the MME that the first converged network device uses as the MME in the 4G network.
  • the second converged network device connected to the AN device is connected to the 4G network.
  • the first converged network device determines that the 4G-GUTI in the registration request message is allocated by the first converged network device; or, if the first converged network device determines that the 4G-GUTI is allocated the MME
  • the MME belonging to the pool is different from the MME belonging to the pool when the first converged network device is used as the MME in the 4G network, and can be processed according to the registration process of the existing terminal in the 5G network. This embodiment of the present application does not specifically limit this. .
  • the registration request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method one including the following steps S1708a-S1709a:
  • the first converged network device sends a rerouting request message to the NG-AN device, so that the NG-AN device receives the rerouting request message from the first converged network device.
  • the rerouting request message includes the mapping GUAMI in the 5G network and the registration request message obtained by the GUMMEI mapping in the 4G-GUTI.
  • the rerouting request message in the embodiment of the present application may be, for example, a rerouting non-access layer NAS message request message, which is not specifically limited in the embodiment of the present application.
  • the NG-AN device sends a registration request message to the second converged network device corresponding to the mapped GUAMI according to the mapped GUAMI in the rerouting request message, so that the second converged network device receives the registration request message from the NG-AN device.
  • the second method includes the following steps S1708b-S1710b:
  • the first converged network device sends a discovery request message to the NRF network element, so that the NRF network element receives the discovery request message from the first converged network device.
  • the discovery request message carries the mapping GUAMI in the 5G network obtained by the GUMMEI mapping in the 4G-GUTI, and is used to query the address information of the second converged network device.
  • the NRF network element sends a discovery response message to the first converged network device, so that the first converged network device receives the discovery response message from the NRF network element.
  • the discovery response message carries address information of the second converged network device.
  • the first converged network device sends an N1 message notification to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the N1 message notification from the first converged network device.
  • the N1 message notification carries the registration request message.
  • the third method includes the following steps S1708c-S1710c:
  • the first converged network device sends a DNS query request message to a DNS server, so that the DNS server receives the DNS query request message from the first converged network device.
  • the DNS query request message carries GUMMEI in 4G-GUTI, and is used to query the address information of the second converged network device.
  • the first converged network device may construct an MME FQDN according to the GUMMEI in 4G-GUTI, and carry the MME FQDN in a DNS query request message to query the address information of the second converged network device.
  • the format of the MME FQDN is as follows, which contains the mapping GUMMEI information:
  • the DNS server sends a DNS query response message to the first converged network device, so that the first converged network device receives the DNS query response message from the DNS server.
  • the DNS query response message carries address information of the second converged network device.
  • the first converged network device sends an MME reroute NAS message request message to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the MME rerouted from the first converged network device.
  • NAS message request message carries the above registration request message.
  • the access method provided in this embodiment of the present application further includes the following steps S1711-S1712:
  • the second converged network device sends a registration acceptance message to the NG-AN device, so that the NG-AN device receives the registration acceptance message from the second converged network device.
  • the registration acceptance message carries a newly allocated 5G-GUTI, and the newly allocated 5G-GUTI can be uniquely associated with a context of a terminal accessed from a 5G network.
  • the NG-AN device sends a registration acceptance message to the terminal, so that the terminal receives the registration acceptance message from the NG-AN device.
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the first converged network device in the above steps S1701a to S1712 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the access system shown in FIG. 2 is a 4G network
  • the second network is a 5G network.
  • the E-UTRAN device does not improve the selection algorithm of the MME, and cannot guarantee that the dual-registered terminal can be selected.
  • a correct converged network device performs processing.
  • this embodiment provides an access method.
  • the access method includes the following steps:
  • S1801a-S1806 are the same as steps S1601a-S1606 in the embodiment shown in FIG. 16. For related description, refer to the embodiment shown in FIG. 16, and details are not described herein again.
  • the first converged network device obtains address information of a target AMF network element that allocates 5G-GUTI to the terminal, and address information of a candidate MME capable of providing services to the E-UTRAN device.
  • the first converged network device may obtain the address of the 5G-GUTI allocated to the terminal in a manner that the first converged network device obtains the address information of the second converged network device in the embodiment shown in FIG. 16.
  • the address information of the target AMF network element reference may be made to the embodiment shown in FIG. 16, and details are not described herein again.
  • the first converged network device may obtain the address information of a candidate MME capable of providing services to the E-UTRAN device according to the identifier of the E-UTRAN device or the identifier of the tracking area served by the E-UTRAN device. .
  • the first converged network device may construct an FQDN according to the identity of the E-UTRAN device or the identity of the tracking area served by the E-UTRAN device, and then send a DNS query request message to the DNS server, so that the DNS server receives the message from the first converged network.
  • DNS query request message of the device The DNS query request message carries the above-mentioned FQDN, and is used for requesting to query the address information of the candidate MME.
  • the DNS server sends a DNS query response message to the first converged network device, so that the first converged network device receives a DNS query response message from the DNS server, and the DNS query response message carries a group of candidate MME identification lists and address information.
  • the first converged network device can construct the FQDN in the following ways:
  • the converged network device can construct FQDN6 according to the identity of the E-UTRAN device.
  • FQDN6 includes the identity of the E-UTRAN device.
  • the format is as follows:
  • the converged network device may construct FQDN7 according to the identification of the tracking area served by the E-UTRAN device.
  • FQDN7 includes the identification of the tracking area served by the E-UTRAN device, and the format is as follows:
  • the embodiment of the present application does not specifically limit the construction manner of the FQDN in the DNS query request message.
  • the first converged network device determines that the address information of the target AMF network element is in the address information of the candidate MME, and then the first converged network device determines that the second converged network device that the terminal used to connect through the E-UTRAN device accesses the 5G network.
  • the first converged network device may determine the address information of the target AMF network element as the address information of the second converged network device.
  • the attach / TAU request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method 1 including the following steps S1809a-S1810a:
  • Steps S1809a-S1810a are the same as steps S1608a-S1609a in the embodiment shown in FIG. 16. For related descriptions, refer to the embodiment shown in FIG. 16, and details are not described herein again.
  • the second method includes the following steps S1809b:
  • step S1809b is the same as step S1610b in the embodiment shown in FIG. 16.
  • step S1610b is the same as step S1610b in the embodiment shown in FIG. 16.
  • the third method includes the following steps S1809c:
  • step S1809c is the same as step S1610c in the embodiment shown in FIG. 16.
  • step S1610c is the same as step S1610c in the embodiment shown in FIG. 16.
  • the access method provided in the embodiment of the present application further includes the following steps S1811-S1812:
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the first converged network device in the above steps S1801a to S1812 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the access system shown in FIG. 2 is a 5G network
  • the second network is a 4G network.
  • the NG-AN device does not improve the selection algorithm of the AMF network element and cannot be guaranteed as a dual-registered terminal.
  • the correct converged network device is selected for processing.
  • this embodiment provides an access method.
  • the access method includes the following steps:
  • S1901a-S1906 are the same as steps S1701a-S1706 in the embodiment shown in FIG. 17. For related description, refer to the embodiment shown in FIG. 17, and details are not described herein again.
  • the first converged network device obtains address information of a target MME that allocates a 4G-GUTI to a terminal, and address information of a candidate AMF network element capable of providing services to an NG-AN device.
  • the first converged network device may obtain the target of assigning 4G-GUTI to the terminal in a manner that the first converged network device obtains the address information of the second converged network device in the embodiment shown in FIG. 17.
  • the address information of the MME reference may be made to the embodiment shown in FIG. 17, and details are not described herein again.
  • the first converged network device may obtain the candidate AMF network element capable of providing services to the NG-AN device according to the identifier of the NG-AN device or the identifier of the tracking area served by the NG-AN device. Address information.
  • the first converged network device may construct an FQDN according to the identity of the NG-AN device or the identity of the tracking area served by the NG-AN device, and then send a DNS query request message to the DNS server, so that the DNS server receives the message from the first converged network.
  • DNS query request message of the device The DNS query request message carries the above-mentioned FQDN, and is used for requesting to query the address information of the candidate AMF network element.
  • the DNS server sends a DNS query response message to the first converged network device, so that the first converged network device receives a DNS query response message from the DNS server.
  • the DNS query response message carries a set of candidate AMF network element identification lists and address information.
  • the first converged network device can construct the FQDN in the following ways:
  • the first converged network device can construct FQDN1 according to the identity of the NG-AN device.
  • FQDN1 includes the identity of the NG-AN device.
  • the format can be the FQDN format corresponding to the identity of the NG-AN device in the 5G network, as shown below. :
  • rannode ⁇ AN device ID> .rannode.5g.mnc ⁇ MNC> .mcc ⁇ MCC> .3gppnetwork.org;
  • the first converged network device may construct FQDN2 according to the identification of the tracking area served by the NG-AN device.
  • FQDN2 includes the identification of the tracking area served by the NG-AN device, and the format may be NG-AN device in the 5G network.
  • the FQDN format corresponding to the identifier of the tracking area served is as follows:
  • the first converged network device can construct FQDN3 according to the identifier of the NG-AN device.
  • FQDN3 includes the identifier of the NG-AN device.
  • the format can be the FQDN format corresponding to the identifier of the E-UTRAN device in the 4G network, as shown below. :
  • the "eNodeB-ID" is filled with the AN device ID from the global AN device ID.
  • the first converged network device can construct FQDN4 according to the identification of the tracking area served by the NG-AN device.
  • FQDN4 includes the identification of the tracking area served by the NG-AN device, and the format can be an E-UTRAN device in a 4G network.
  • the FQDN format corresponding to the identifier of the tracking area served is as follows:
  • the "TAC-low-byte” is filled with the lower 1 byte of the TAC field of 5G-TAI; the "TAC-high-byte” is filled with the high 2 bytes of the TAC field of 5G-TAI.
  • the first converged network device may construct FQDN5 according to the identification of the tracking area served by the NG-AN device.
  • the FQDN5 includes the MCC, MNC, and the lower 16 bits of the identification of the tracking area served by the NG-AN device. (Ie, the lower 2 bytes).
  • the format can be the FQDN format corresponding to the identifier of the tracking area served by the E-UTRAN device in the 4G network, as shown below:
  • the "TAC-low-byte” is filled with the lowest byte of the TAC field of 5G-TAI; the "TAC-high-byte” is filled with the middle byte of the TAC field of 5G-TAI; the TAC field of 5G-TAI The most significant byte of is discarded directly.
  • the embodiment of the present application does not specifically limit the construction manner of the FQDN in the DNS query request message.
  • the first converged network device may send a discovery request message to the NRF network element, so that the NRF network element receives the discovery request message from the converged network device.
  • the discovery request message carries the identifier of the NG-AN device or the identifier of the tracking area served by the NG-AN device, and is used for requesting to query the address information of the candidate AMF network element.
  • the NRF network element sends a discovery response message to the converged network device, so that the converged network device receives a discovery response message from the NRF network element, and the discovery response message carries address information of a set of candidate AMF network elements.
  • the first converged network device determines that the address information of the target MME is in the address information of the candidate AMF network element, and then the first converged network device determines that the second converged network device connected to the terminal through the NG-AN device accesses the 4G network.
  • the first converged network device may determine the address information of the target MME as the address information of the second converged network device.
  • the attach / TAU request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method one including the following steps S1909a-S1910a:
  • Steps S1909a to S1910a are the same as steps S1708a to S1709a in the embodiment shown in FIG. 17. For related description, refer to the embodiment shown in FIG. 17, and details are not described herein again.
  • the second method includes the following step S1909b:
  • step S1909b is the same as step S1710b in the embodiment shown in FIG. 17.
  • step S1710b is the same as step S1710b in the embodiment shown in FIG. 17.
  • the third method includes the following steps S1909c:
  • step S1909c is the same as step S1710c in the embodiment shown in FIG. 17.
  • step S1710c is the same as step S1710c in the embodiment shown in FIG. 17.
  • the access method provided in the embodiment of the present application further includes the following steps S1911-S1912:
  • the re-access of dual-registered terminals can be achieved on the premise that the complexity of network deployment is simplified and the workload of network operation and maintenance is reduced.
  • the access system part please refer to the related description of the access system part, which will not be repeated here.
  • the actions of the first converged network device in the above steps S1901a to S1912 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the switching system shown in FIG. 3 is a 4G network and the second network is a 5G network.
  • the source MME can ensure that the correct converged network device is selected for dual-registered terminals for processing.
  • FIG. 20 shows a switching method provided by an embodiment of the present application. The switching method includes the following steps:
  • the terminal sends the information of the terminal to the source E-UTRAN device, so that the source E-UTRAN device receives the information of the terminal from the terminal.
  • the information of the terminal includes the 5G-GUTI of the terminal in the 5G network.
  • the source E-UTRAN device sends a handover request (handover required) to the source MME, so that the source MME receives the handover request from the source E-UTRAN device.
  • the handover requirement carries the 5G-GUTI of the terminal in the 5G network, and the identity of the target E-UTRAN device or the identity of the tracking area served by the target E-UTRAN device.
  • the identifier of the target E-UTRAN device or the identifier of the tracking area served by the target E-UTRAN device reference may be made to the embodiment shown in FIG. 8, and details are not described herein again.
  • the source MME determines that the target E-UTRAN device does not belong to the source MME according to the identifier of the target E-UTRAN device or the identifier of the tracking area served by the target E-UTRAN device.
  • whether the target E-UTRAN device belongs to the jurisdiction of the source MME can be understood as whether the target E-UTRAN device has established a connection with the source MME, which will be collectively described here, and will not be described in detail below.
  • the source MME can match the identity of the target E-UTRAN device carried in the handover requirement with the identity of the E-UTRAN device reported by each E-UTRAN device previously connected in the E-UTRAN device registration process. The match is successful. For example, if the identity of each E-UTRAN device connected to the E-UTRAN device previously reported in the E-UTRAN device registration process includes the identification of the target E-UTRAN device carried in the handover requirement, the target E can be determined. -The UTRAN device belongs to the source MME.
  • the source MME may compare the identification of the tracking area served by the target E-UTRAN device carried in the handover requirement with the E-UTRAN reported by the E-UTRAN device that has previously connected with itself in the E-UTRAN device registration process.
  • the identification of the tracking area served by the device is matched. If the matching is successful, for example, the identification of the tracking area served by the E-UTRAN device reported by the E-UTRAN device previously connected in the E-UTRAN device registration process includes a switch.
  • the identification of the tracking area served by the target E-UTRAN device carried in the requirement can determine that the target E-UTRAN device belongs to the jurisdiction of the source MME.
  • the source MME can determine that the target E-UTRAN device does not belong to the jurisdiction of the source MME.
  • the source MME may Processing is performed with reference to an existing 4G network handover process, which is not specifically limited in this embodiment of the present application.
  • the source MME obtains the identity list and address information of the candidate MME according to the identity of the target E-UTRAN device or the identity of the tracking area served by the target E-UTRAN device.
  • step S2004 For specific implementation of step S2004, reference may be made to the manner in which the first converged network device obtains the identification list and address information of the candidate MME from the DNS server in the embodiment shown in FIG. 18, and details are not described herein again.
  • the identifier list of the candidate MME in this embodiment of the present application may include the GUMMEI of the MME, or the original GUMMEI corresponding to the converged network device as the MME and the mapped GUMMEI corresponding to the converged network device as the AMF network element. Not specifically limited.
  • the source MME determines the target converged network device according to the foregoing 5G-GUTI and the identity list of the candidate MME.
  • the source MME may determine the converged network device corresponding to the mapping GUMMEI in the identification list of the candidate MME that is the same as the mapping GUMMEI obtained by mapping the GUAMI in the 5G-GUTI in the 4G network.
  • Target converged network equipment may be determined.
  • the source MME sends a forward redirection request (forward relocation request) message to the target converged network device according to the address information of the target converged network device included in the address information of the candidate MME, so that the target converged network device receives the forwarding from the source MME.
  • forward redirection request forward relocation request
  • the forwarding redirection request message carries the 4G context of the terminal and is used to request the target converged network device to prepare related resources for the terminal.
  • the target converged network device sends a handover request (handover request) to the target E-UTRAN device, so that the target E-UTRAN device receives the handover request from the converged network device.
  • the handover request is used to request the target E-UTRAN device to prepare related resources for the terminal.
  • the target E-UTRAN device sends a handover request confirmation (handover request acknowledgement) to the target converged network device, so that the target converged network device receives the handover request confirmation from the target E-UTRAN device.
  • a handover request confirmation handover request acknowledgement
  • the target converged network device sends a forward redirection response (forward, relocation, response) message to the source MME, so that the source MME receives the forward redirection response message from the target converged network device.
  • a forward redirection response forward, relocation, response
  • the source MME sends a handover command (handover command) to the source E-UTRAN device, so that the source E-UTRAN device receives the handover command from the source MME.
  • the handover command is used to instruct the terminal to be handed over to the target E-UTRAN device.
  • the source E-UTRAN device sends a handover command to the terminal, so that the terminal receives the handover command from the source E-UTRAN device.
  • the terminal After the terminal switches to the target E-UTRAN device, it sends a handover confirmation message to the target E-UTRAN device, so that the target E-UTRAN device receives the handover confirmation message from the terminal.
  • the handover confirmation message is used to indicate that the terminal has handed over to the target E-UTRAN device.
  • the target E-UTRAN device sends a handover notification to the target converged network device, so that the target converged network device receives the handover notification from the target E-UTRAN device.
  • the handover notification is used to indicate that the terminal has handed over to the target E-UTRAN device.
  • the target converged network device sends a forwarding redirection completion notification to the source MME, so that the source MME receives the forwarding redirection completion notification from the target converged network device.
  • the forwarding and redirection completion notification is used to indicate that it can release resources related to the terminal.
  • the source MME sends a forwarding redirection completion confirmation to the target converged network device, so that the target converged network device receives the forwarding redirection completion confirmation from the source MME.
  • the source MME sends a release command to the source E-UTRAN device, so that the source E-UTRAN device receives a release command from the source MME.
  • the release command is used to instruct to release resources related to the terminal.
  • the source E-UTRAN device can release the resources related to the terminal according to the release command, which is not specifically limited in this embodiment of the present application.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the source MME in the above steps S2001 to S2016 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not limited in the embodiment of the present application.
  • the first network in the switching system shown in FIG. 3 is a 5G network
  • the second network is a 4G network.
  • the source AMF network element can ensure that the correct converged network device is selected for dual-registered terminals for processing.
  • this embodiment of the present application provides a handover method.
  • the handover method includes the following steps:
  • the terminal sends information of the terminal to the source NG-AN device, so that the source NG-AN device receives the information of the terminal from the terminal.
  • the information of the terminal includes the 4G-GUTI of the terminal in the 4G network.
  • the source NG-AN device sends a switching request to the source AMF network element, so that the source AMF network element receives the switching request from the source NG-AN device.
  • the handover requirement carries the 4G-GUTI of the terminal in the 4G network, and the identifier of the target NG-AN device or the identifier of the tracking area served by the target NG-AN device.
  • the identifier of the target NG-AN device or the identifier of the tracking area served by the target NG-AN device reference may be made to the embodiment shown in FIG. 10, and details are not described herein again.
  • step S2103. Similar to step S2003 in FIG. 20, except that the source MME in step S2003 is replaced by the source AMF network element in the embodiment of the present application; the target E-UTRAN device in step S2003 is replaced by the implementation of this application.
  • the target NG-AN device in the example the remaining related descriptions can refer to the embodiment shown in FIG. 20, which will not be repeated here.
  • the source AMF network element obtains the identification list and address information of the candidate AMF network element according to the identifier of the target NG-AN device or the identifier of the tracking area served by the target NG-AN device.
  • step S2104 For specific implementation of step S2104, reference may be made to the manner in which the first converged network device obtains the identification list and address information of the candidate AMF network element from the NRF network element in the embodiment shown in FIG. 19, and details are not described herein again.
  • the candidate AMF network element identification list in the embodiment of the present application may include the GUAMI of the AMF network element, or the original GUAMI corresponding to the converged network device as the AMF network element, and the mapped GUAMI corresponding to the converged network device as the MME. This application does not specifically limit this.
  • the source AMF network element determines the target converged network device according to the foregoing 4G-GUTI and the candidate AMF network element identification list.
  • the source AMF network element may include in the identity list of candidate AMF network elements a fusion corresponding to the mapping GUAMI that is the same as the mapping GUAMI obtained by mapping the GUMMEI in the 4G-GUTI in the 5G network.
  • the network device is determined as the target converged network device.
  • the source AMF network element sends a create context request message to the target fusion network device according to the address information of the target fusion network device included in the address information of the candidate AMF network element, so that the target fusion network device receives the request from the source.
  • AMF network element creation context request message sends a create context request message to the target fusion network device according to the address information of the target fusion network device included in the address information of the candidate AMF network element, so that the target fusion network device receives the request from the source.
  • the context creation request message carries the 5G context of the terminal and is used to request the target converged network device to prepare related resources for the terminal.
  • S2107-S2108 are similar to steps S2007-S2008 in FIG. 20, except that the target E-UTRAN device in steps S2007-S2008 is replaced with the target NG-AN device in the embodiment of the present application.
  • steps S2007-S2008 is replaced with the target NG-AN device in the embodiment of the present application.
  • the target converged network device sends a create context response (create context response) message to the source AMF network element, so that the source AMF network element receives the create context response message from the target converged network device.
  • S2110-S2113 are similar to steps S2010-S2013 in FIG. 20, except that the target E-UTRAN device in steps S2010-S2013 is replaced with the target NG-AN device in the embodiment of the present application; steps S2010-S2013 are replaced.
  • the source E-UTRAN device in the example is replaced with the source NG-AN device in the embodiment of the present application; the source MME in steps S2010-S2013 is replaced with the source AMF network element in the embodiment of the present application.
  • FIG. 20 The illustrated embodiment is not described in detail here.
  • the target converged network device sends an N2 information notify (N2) information notify message to the source AMF network element, so that the source AMF network element receives the N2 information notification from the target converged network device.
  • N2 information notify is used to indicate that it can release resources related to the terminal.
  • the source AMF network element sends an N2 information notification confirmation (N2) to the target converged network device, so that the target converged network device receives the N2 information notification confirmation from the source AMF network element.
  • N2 information notification confirmation N2
  • the source AMF network element sends a release command to the source NG-AN device, so that the source NG-AN device receives the release command from the source AMF network element.
  • the release command is used to instruct to release resources related to the terminal.
  • the source NG-AN device can release the resources related to the terminal according to the release command, which is not specifically limited in this embodiment of the present application.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the source MME in the above steps S2101 to S2116 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling application code stored in the memory 603, which is not limited in the embodiment of the present application.
  • the first network in the handover system shown in FIG. 4 is a 4G network
  • the second network is a 5G network.
  • the source MME's selection algorithm for the target MME has not been improved, and it cannot be guaranteed that the correct one is selected for the dual registration terminal.
  • processing performed by a converged network device is shown in FIG. 22, which is a handover method provided in this embodiment of the present application.
  • the handover method includes the following steps:
  • S2201-S2204 are the same as steps S2001-S2004 in the embodiment shown in FIG. 20.
  • steps S2001-S2004 are the same as steps S2001-S2004 in the embodiment shown in FIG. 20.
  • steps S2001-S2004 are the same as steps S2001-S2004 in the embodiment shown in FIG. 20.
  • details are not described herein again.
  • the source MME selects the first converged network device to provide services to the terminal according to the identity list of the candidate MME.
  • the source MME sends a forwarding redirection request message to the first converged network device according to the address information of the first converged network device, so that the target converged network device receives the forwarding redirection request message from the source MME.
  • the forwarding redirection request message carries the above-mentioned 5G-GUTI and the address information of the source MME.
  • S2207-S2208 are the same as steps S1606-S1607 in the embodiment shown in FIG. 16. For related description, refer to the embodiment shown in FIG. 16, and details are not described herein again.
  • the first converged network device determines that the 5G-GUTI is allocated by the first converged network device; or if the first converged network device determines that the AMF network element to which the 5G-GUTI is allocated belongs to the AMF
  • the pool is different from the AMF pool to which the first converged network device belongs as the AMF network element in the 5G network, and can be processed according to the handover procedure of the existing terminal in the 4G network, which is not specifically limited in this embodiment of the present application.
  • the forwarding redirection request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method 1 including the following steps S2209a-S2211a:
  • S2209a-S2211a is similar to steps S1608b-S1610b, except that the MME reroutes the NAS message request message in steps S1608b-S1610b to carry the attach / TAU request message to the MME reroute forwarding redirection request in the embodiment of this application
  • the (MME, reroute, forward, relocation, request) message carries a forward redirection request message.
  • the second method includes the following steps S2209b-S2212b:
  • S2209b-S2210b are the same as the above steps S2209a-S2210a, and are not repeated here.
  • the first converged network device sends a forwarding redirection response message to the source MME, so that the source MME receives the forwarding redirection response message from the first converged network device.
  • the forwarding redirection response message carries instruction information and address information of the second converged network device, and the instruction information is used to instruct the source MME to send a forwarding redirection request message to the second converged network device.
  • the source MME sends the foregoing forwarding redirection request message to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the forwarding redirection request message from the source MME.
  • the third method includes the following steps S2209c-S2211c:
  • S2209c-S2211c is similar to steps S1608c-S1610c, except that the N1 message notification in steps S1608c-S1610c carries the attach / TAU request message with the forward redirection request message notification (forward redirection request message notification) in the embodiment of this application
  • the notification carries a forwarding redirection request message.
  • the access method provided in the embodiment of the present application further includes the following steps:
  • S2213-S2222 is similar to steps S2007-S2016 in the embodiment shown in FIG. 20, except that the target converged network device in step S2007-S2016 is replaced with the second converged network device in the embodiment of the present application, and the rest For related description, reference may be made to the embodiment shown in FIG. 20, and details are not described herein again.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the first converged network device in the above steps S2201 to S2222 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the switching system shown in FIG. 4 is a 5G network and the second network is a 4G network.
  • the selection algorithm of the source AMF network element for the target AMF network element is not improved, and it cannot be guaranteed as a dual-registered terminal
  • a correct converged network device is selected for processing.
  • this embodiment provides a handover method.
  • the handover method includes the following steps:
  • S2301-S2304 are the same as steps S2101-S2104 in the embodiment shown in FIG. 21, and related descriptions may refer to the embodiment shown in FIG. 21, and details are not described herein again.
  • the source AMF network element selects the first converged network device to provide services to the terminal according to the identification list of candidate AMF network elements.
  • the source AMF network element sends a create context request message to the first converged network device according to the address information of the first converged network device, so that the target converged network device receives the create context request message from the source AMF network element.
  • the context creation request message carries the 5G-GUTI and the address information of the source AMF network element.
  • S2307-S2308 are similar to steps S1706-S1707 in the embodiment shown in FIG. 17, except that the NG-AN device in the embodiment shown in FIG. 7 is replaced by the target NG-AN device in the embodiment of this application.
  • the NG-AN device in the embodiment shown in FIG. 7 is replaced by the target NG-AN device in the embodiment of this application.
  • the first converged network device determines that the 4G-GUTI in the registration request message is allocated by the first converged network device; or, if the first converged network device determines that the 4G-GUTI is allocated the MME
  • the belonging MME pool is different from the MME pool when the first converged network device is used as the MME in the 4G network, and can be processed according to the handover procedure of the existing terminal in the 5G network. This embodiment of the present application does not specifically limit this. .
  • the context creation request message may be redirected to the second converged network device in any of the following manners 1 to 3.
  • Method 1 including the following steps S2309a-S2311a:
  • S2309a-S2311a is similar to steps S1708b-S1710b, except that the N1 message notification in steps S1708b-S1710b carries the registration request message and is replaced by the forwarding redirection request message notification in the embodiment of this application that carries the creation context request message, and the rest
  • the N1 message notification in steps S1708b-S1710b carries the registration request message and is replaced by the forwarding redirection request message notification in the embodiment of this application that carries the creation context request message, and the rest
  • the second method includes the following steps S2309b-S3212b:
  • S2309b-S2310b are the same as the above steps S2309a-S2310a, and are not repeated here.
  • the first converged network device sends a create context response message to the source AMF network element, so that the source AMF network element receives the create context response message from the first converged network device.
  • the creation context response message carries indication information and address information of the second converged network device, and the indication information is used to instruct the source AMF network element to send a creation context request message to the second converged network device.
  • the source AMF network element sends the above-mentioned creation context request message to the second converged network device according to the address information of the second converged network device, so that the second converged network device receives the creation context request message from the source AMF network element.
  • the third method includes the following steps S2309c-S2311c:
  • S2309c-S2311c is similar to steps S1708c-S1710c, except that the MME reroutes the NAS message request carrying the registration request message in steps S1708c-S1710c is replaced with the MME rerouting and forwarding redirection request message carrying creation in the embodiment of this application.
  • the context request message, and other related descriptions may refer to the embodiment shown in FIG. 17, which is not repeated here.
  • the access method provided in the embodiment of the present application further includes the following steps:
  • S2313-S2322 is similar to steps S2107-S2116 in the embodiment shown in FIG. 21, and the difference is that the target converged network device in steps S2107-S2116 is replaced with the second converged network device in the embodiment of the present application, and the rest For related description, reference may be made to the embodiment shown in FIG. 21, and details are not described herein again.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the first converged network device in the above steps S2301 to S2322 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the handover system shown in FIG. 4 is a 4G network
  • the second network is a 5G network.
  • the source MME's selection algorithm for the target MME has not been improved, and it cannot be guaranteed that the correct one is selected for the dual registration terminal.
  • processing performed by a converged network device is shown in FIG. 24, which is a handover method provided in this embodiment of the present application.
  • the handover method includes the following steps:
  • S2401-S2407 are the same as steps S2201-S2207 in the embodiment shown in FIG. 22.
  • steps S2201-S2207 are the same as steps S2201-S2207 in the embodiment shown in FIG. 22.
  • FIG. 22 For related description, refer to the embodiment shown in FIG. 22, and details are not described herein again.
  • the first converged network device obtains address information of a target AMF network element that allocates 5G-GUTI to the terminal, and address information of a candidate MME that can provide services to the target E-UTRAN device.
  • the first converged network device may obtain the target of assigning a 5G-GUTI to the terminal in a manner that the first converged network device obtains the address information of the second converged network device in the embodiment shown in FIG. 22
  • the address information of the AMF network element reference may be made to the embodiment shown in FIG. 22, and details are not described herein again.
  • the first converged network device may obtain a candidate MME capable of providing services to the target E-UTRAN device according to the identification of the target E-UTRAN device or the identification of the tracking area served by the target E-UTRAN device.
  • a candidate MME capable of providing services to the target E-UTRAN device according to the identification of the target E-UTRAN device or the identification of the tracking area served by the target E-UTRAN device.
  • the source MME may carry the address information of the candidate MME obtained by the source MME and capable of serving the target E-UTRAN device in the forwarding redirection request message sent to the first converged network device, so that the first A converged network device can obtain address information of a candidate MME capable of providing services to a target E-UTRAN device, which is not specifically limited in this embodiment of the present application.
  • the first converged network device determines that the address information of the target AMF network element is in the address information of the candidate MME, and then the first converged network device determines that the second converged network device that the terminal has connected to through the target E-UTRAN device accesses the 5G network.
  • the first converged network device may determine the address information of the target AMF network element as the address information of the second converged network device.
  • the forwarding redirection request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method one includes the following steps S2410a:
  • step S2410a is the same as step S2211a in the embodiment shown in FIG. 22.
  • step S2211a is the same as step S2211a in the embodiment shown in FIG. 22.
  • steps S2211a is the same as step S2211a in the embodiment shown in FIG. 22.
  • the second method includes the following steps S2410b-S2411b:
  • S2410b-S2411b are the same as steps S2211b-S2212b in the embodiment shown in FIG. 22, and related descriptions may refer to the embodiment shown in FIG. 22, and details are not described herein again.
  • the third method includes the following step S2410c:
  • step S2410c is the same as step S2211c in the embodiment shown in FIG. 22.
  • step S2211c is the same as step S2211c in the embodiment shown in FIG. 22.
  • steps S2211c is the same as step S2211c in the embodiment shown in FIG. 22.
  • the handover method provided in the embodiment of the present application further includes the following steps S2412-S2421:
  • S2412-S2421 are the same as steps S2213-S2222.
  • steps S2213-S2222 For related description, refer to the embodiment shown in FIG. 22, and details are not described herein again.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the first converged network device in the above steps S2401 to S2421 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the first network in the switching system shown in FIG. 4 is a 5G network and the second network is a 4G network.
  • the selection algorithm of the source AMF network element for the target AMF network element is not improved, and it cannot be guaranteed as a dual-registered terminal.
  • a correct converged network device is selected for processing.
  • this embodiment provides a handover method.
  • the handover method includes the following steps:
  • S2501-S2507 are the same as steps S2301-S2307 in the embodiment shown in FIG. 23, and related descriptions may refer to the embodiment shown in FIG. 23, and details are not described herein again.
  • the first converged network device obtains address information of a target MME that allocates a 4G-GUTI to the terminal, and address information of a candidate AMF network element that can provide services to the target NG-AN device.
  • the first converged network device may obtain the target of assigning 4G-GUTI to the terminal in a manner that the first converged network device obtains address information of the second converged network device in the embodiment shown in FIG. 23
  • address information of the MME reference may be made to the embodiment shown in FIG. 23, and details are not described herein again.
  • the first converged network device may obtain a candidate AMF capable of providing services to the target NG-AN device according to the identification of the target NG-AN device or the identification of the tracking area served by the target NG-AN device.
  • the source AMF network element may carry the address of the candidate AMF network element obtained by the source AMF network element and capable of providing services to the target NG-AN device in the create context request message sent to the first converged network device. Information so that the first converged network device can obtain the address information of candidate AMF network elements that can provide services to the target NG-AN device, which is not specifically limited in this embodiment of the present application.
  • the first converged network device determines that the address information of the target MME is in the address information of the candidate AMF network element, and then the first converged network device determines that the second converged network device that the terminal has connected to through the target NG-AN device accesses the 4G network.
  • the first converged network device may determine the address information of the target MME as the address information of the second converged network device.
  • the forwarding redirection request message may be redirected to the second converged network device in any one of the following manners 1 to 3.
  • Method one includes the following steps S2510a:
  • step S2510a is the same as step S2311a in the embodiment shown in FIG. 23, and related descriptions may refer to the embodiment shown in FIG. 23, and details are not described herein again.
  • the second method includes the following steps S2510b-S2511b:
  • S2510b-S2511b are the same as steps S2311b-S2312b in the embodiment shown in FIG. 23, and related descriptions may refer to the embodiment shown in FIG. 23, and details are not described herein again.
  • the third method includes the following step S2510c:
  • step S2510c is the same as step S2311c in the embodiment shown in FIG. 23.
  • step S2311c is the same as step S2311c in the embodiment shown in FIG. 23.
  • the handover method provided in the embodiment of the present application further includes the following steps S2512-S2521:
  • S2512-S2521 are the same as steps S2313-S2322.
  • steps S2313-S2322 For related description, refer to the embodiment shown in FIG. 23, and details are not described herein again.
  • a successful handover of a dual-registered terminal can be achieved on the premise of simplifying the complexity of network deployment and reducing the workload of network operation and maintenance.
  • the switching system part please refer to the related description of the switching system part, which is not repeated here.
  • the actions of the first converged network device in the above steps S2501 to S2521 may be executed by the processor 601 in the communication device 600 shown in FIG. 6 calling the application program code stored in the memory 603, which is not described in this embodiment of the present application. No restrictions.
  • the access device, the first converged network device, or the source mobility management network element includes a hardware structure and / or a software module corresponding to each function.
  • this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • functional modules may be divided into an access device, a first converged network device, or a source mobility management network element according to the foregoing method example.
  • each functional module may be divided corresponding to each function, or two or two may be divided.
  • the above functions are integrated in a processing module.
  • the above integrated modules may be implemented in the form of hardware or 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. 26 shows a schematic structural diagram of an access device 260.
  • the access device 260 is an access device in the first network.
  • the access device 260 includes a transceiver module 2602 and a processing module 2601.
  • the transceiver module 2602 is configured to receive an access request from a terminal, where the access request carries a first mobility management identifier and a third mobility management identifier, where the first mobility management identifier is a first mobility management network element in the first network.
  • the third mobility management identifier is a mapped mobility management identifier in the first network, which is obtained by mapping the terminal's mobility management identifier in the GUTI in the second network, where the first network and the second network are different types of networks .
  • a processing module 2601 is configured to determine a target converged network device according to a third mobility management identifier when it is determined that there is no connection between the first mobility management network element and the access device 260 according to the first mobility management identifier.
  • the mapped mobile management identifier in the first network is the third mobile management identifier, and the target converged network device is used for the terminal to access the first network.
  • the transceiver module 2602 is further configured to send a setup request to the target converged network device.
  • the setup request is used to request registration with the target converged network device.
  • the transceiver module 2602 is further configured to establish a response from the target converged network device and establish a response. Carrying a second mobility management identifier and a third mobility management identifier, where the second mobility management identifier is the original mobility management identifier corresponding to the target converged network device as the second mobility management network element in the first network.
  • the access device 260 is presented in the form of dividing each functional module in an integrated manner.
  • the "module" herein may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.
  • the access device 260 may take the form shown in FIG. 6.
  • the processor 601 in FIG. 6 may cause the access device 260 to execute the access method in the foregoing method embodiment by calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the transceiver module 2602 and the processing module 2601 in FIG. 26 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the processing module 2601 in FIG. 26 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603, and the function / implementation process of the transceiver module 2602 in FIG. 26 may be performed through the graph.
  • the communication interface 604 in 6 is implemented.
  • the access device 260 provided in this embodiment can perform the foregoing access method, the technical effects that can be obtained can refer to the foregoing method embodiments, and details are not described herein again.
  • an embodiment of the present application further provides an apparatus (for example, the apparatus may be a chip system).
  • the apparatus includes a processor, and is configured to support an access device to implement the foregoing access method, for example, according to a first mobile management If it is determined that there is no connection between the first mobility management network element and the access device, the target converged network device is determined according to the third mobility management identifier.
  • the device further includes a memory. This memory is used to store the necessary program instructions and data of the access device. Of course, the memory may not be in the device.
  • the device is a chip system, the device may be composed of a chip, and may also include a chip and other discrete devices, which are not specifically limited in the embodiments of the present application.
  • FIG. 27 shows a schematic structural diagram of a first converged network device 270.
  • the first converged network device 270 includes a transceiver module 2702 and a processing module 2701.
  • the transceiver module 2702 is configured to receive an access request from an access device in the first network, where the access request carries a GUTI of the terminal in the second network, where the first network and the second network are different types of networks.
  • the processing module 2701 is configured to determine, according to the GUTI, that the second converged network device connected to the terminal through the access device accesses the second network.
  • the transceiver module 2702 is further configured to send an access request to the second converged network device, and the access request is used for the terminal to access the first network through the second converged network device.
  • the processing module 2701 is specifically configured to: determine that the GUTI is not the GUTI allocated by the first converged network device 270; determine that the mobile management resource pool to which the mobile management network element to which the GUTI is allocated and the first converged network device 270 are included in the second network When the mobile management network element to which the mobile management network element belongs is the same, it is determined that the second converged network device connected to the terminal through the access device accesses the second network.
  • the processing module 2701 is specifically configured to: determine that the GUTI is not the GUTI allocated by the first converged network device 270; obtain address information of a target mobile management network element that assigns the GUTI to the terminal, and be capable of providing access to the first network.
  • the transceiver module 2702 is configured to send an access request to the second converged network device. Specifically, the transceiver module is used to send a rerouting request message to the access device.
  • the rerouting request message carries the access request and the first one in the GUTI.
  • the mobile management identifier in the first network is obtained by mapping the mobile management identifier, and the mapped mobile management identifier is used for the access device to send an access request to the second converged network device.
  • the processing module 2701 is further configured to obtain address information of the second converged network device according to the GUTI.
  • the transceiver module 2702 is configured to send an access request to the second converged network device, and is specifically configured to send an access request to the second converged network device according to the address information of the second converged network device.
  • the processing module 2701 is configured to obtain the address information of the second converged network device according to the GUTI. Specifically, the processing module 2701 is configured to send a first request message, where the first request message carries a mapping obtained by mapping the first mobility management identifier in the GUTI. The mobile management identifier mapped on the first network is used to query the address information of the second converged network device; the first response message, and the first response message carries the address information of the second converged network device.
  • the first network is a 4G network and the second network is a 5G network.
  • the transceiver module 2702 is configured to send a first request message, specifically: used to send a first request message to a DNS server;
  • the transceiver module 2702 is configured to receive a first response message, and is specifically configured to receive a first response message from a DNS server.
  • the first network is a 5G network
  • the second network is a 4G network.
  • the transceiver module 2702 is configured to send a first request message, and is specifically configured to send a first request message to a network storage function network element.
  • the processing module 2701 is configured to obtain the address information of the second converged network device according to the GUTI. Specifically, the processing module 2701 is configured to send a second request message, where the second request message carries a first mobility management identifier in the GUTI and is used for querying. Address information of the second converged network device; receiving a second response message, the second response message carrying the address information of the second converged network device.
  • the first network is a 4G network
  • the second network is a 5G network.
  • the transceiver module 2702 is configured to send a second request message, and is specifically configured to send a second request to a network storage function network element. Request message.
  • the transceiver module 2702 is configured to receive a second response message, and is specifically configured to receive a second response message from a network storage function network element.
  • the first network is a 5G network
  • the second network is a 4G network.
  • the transceiver module 2702 is configured to send a second request message, and is specifically configured to send a second request message to a DNS server.
  • the transceiver module 2702 is configured to receive a second response message, specifically: used to receive a second response message from a DNS server.
  • the processing module 2701 is further configured to determine the address information of the target mobility management network element as the address information of the second converged network device; correspondingly, the transceiver module 2702 is configured to send an access request to the second converged network device Specifically, it is configured to send an access request to the second converged network device according to the address information of the second converged network device.
  • the processing module 2701 is configured to obtain address information of a target mobility management network element that assigns a GUTI to a terminal, and is specifically used to send a first request message, where the first request message carries a mapping of a first mobility management identifier in the GUTI The obtained mapped mobility management identifier in the first network is used to query the address information of the target mobility management network element; a first response message is received, and the first response message carries the address information of the target mobility management network element.
  • the first network is a 4G network and the second network is a 5G network.
  • the transceiver module 2702 is configured to send a first request message, specifically: used to send a first request message to a DNS server;
  • the transceiver module 2702 is configured to receive a first response message, and is specifically configured to receive a first response message from a DNS server.
  • the first network is a 5G network
  • the second network is a 4G network.
  • the transceiver module 2702 is configured to send a first request message, and is specifically configured to send a first request message to a network storage function network element.
  • the processing module 2701 is configured to obtain address information of a target mobility management network element that assigns a GUTI to a terminal, and is specifically used to send a second request message, where the second request message carries a first mobility management identifier in the GUTI, and Inquiring about the address information of the target mobility management network element that assigns the GUTI to the terminal; receiving a second response message, the second response message carrying the address information of the target mobility management network element.
  • the first network is a 4G network
  • the second network is a 5G network.
  • the transceiver module 2702 is configured to send a second request message, and is specifically configured to send a second request to a network storage function network element. Request message; correspondingly, the transceiver module 2702 is configured to receive a second response message, specifically: used to receive a second response message from a network storage function network element.
  • the first network is a 5G network
  • the second network is a 4G network
  • the transceiver module 2702 is configured to send a second request message, and is specifically configured to send a second request message to a DNS server.
  • receiving the second response message by the first converged network device 270 is specifically: receiving a second response message from a DNS server.
  • the processing module 2701 is configured to obtain address information of a candidate mobile management network element capable of providing services to an access device in the first network, and is specifically configured to receive a first mobile network capable of providing the first network from a source mobile management network element.
  • the address information of the candidate mobility management network element that the access device in the service provides.
  • the processing module 2701 is configured to obtain address information of a candidate mobile management network element capable of providing services to an access device in the first network, specifically:
  • the first converged network device 270 is presented in the form of dividing each functional module in an integrated manner.
  • the "module” herein may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.
  • the first converged network device 270 may take the form shown in FIG. 6.
  • the processor 601 in FIG. 6 may cause the first converged network device 270 to execute the access method in the foregoing method embodiment by calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the transceiver module 2702 and the processing module 2701 in FIG. 27 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the processing module 2701 in FIG. 27 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603, and the function / implementation process of the transceiver module 2702 in FIG.
  • the communication interface 604 in 6 is implemented.
  • the first converged network device 270 provided in this embodiment can perform the foregoing access method, the technical effects that can be obtained can refer to the foregoing method embodiments, and details are not described herein again.
  • an embodiment of the present application further provides an apparatus (for example, the apparatus may be a chip system), and the apparatus includes a processor, which is configured to support a first converged network device to implement the foregoing access method, for example, according to a GUTI, determine The terminal accesses the second network through the second converged network device connected to the access device.
  • the device further includes a memory.
  • the memory is used to store program instructions and data necessary for the first converged network device. Of course, the memory may not be in the device.
  • the device is a chip system, the device may be composed of a chip, and may also include a chip and other discrete devices, which are not specifically limited in the embodiments of the present application.
  • FIG. 28 shows a schematic structural diagram of a source mobility management network element 280.
  • the source mobility management network element 280 is a source mobility management network element in the first network.
  • the source mobility management network element 280 includes a transceiver module 2802 and a processing module 2801.
  • the transceiver module 2802 is configured to receive a handover requirement from a first access device in the first network, where the handover requirement carries an identifier of a second access device of the first network or an identifier of a tracking area served by the second access device, And, the GUTI of the terminal in the second network, wherein the first network and the second network are different types of networks.
  • a processing module 2801 is configured to obtain an identification list and address information of a candidate mobility management network element according to an identifier of the second access device or an identifier of a tracking area.
  • the processing module 2801 is further configured to determine a target converged network device according to the GUTI and the identity list of candidate mobile management network elements, where the target converged network device is a converged network device corresponding to one of the identifiers in the identity list of the candidate mobile management network elements .
  • the transceiver module 2802 is further configured to send a request message to the target converged network device according to the address information of the target converged network device included in the address information of the candidate mobility management network element, and the request message is used to switch the terminal to the target converged network device.
  • the processing module 2801 is configured to determine the target converged network device according to the identification list of the GUTI and the candidate mobility management network element, and is specifically used to determine the mapping of the first mobility management identifier in the GUTI to the first network.
  • Identification The fusion network device corresponding to the same identification as the mapped mobility management identification in the identification list of the candidate mobility management network element is determined as the target fusion network device.
  • the source mobility management network element 280 is presented in the form of dividing each functional module in an integrated manner.
  • the "module" herein may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.
  • the source mobility management network element 280 may adopt the form shown in FIG. 6.
  • the processor 601 in FIG. 6 may cause the source mobile management network element 280 to execute the handover method in the foregoing method embodiment by calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the transceiver module 2802 and the processing module 2801 in FIG. 28 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the processing module 2801 in FIG. 28 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603, and the function / implementation process of the transceiving module 2802 in FIG. 28 may be performed through FIG.
  • the communication interface 604 in 6 is implemented.
  • the source mobility management network element 280 provided in this embodiment can perform the foregoing handover method, the technical effects that can be obtained can refer to the foregoing method embodiments, and details are not described herein again.
  • an embodiment of the present application further provides a device (for example, the device may be a chip system).
  • the device includes a processor, and is configured to support a source mobility management network element to implement the foregoing switching method, for example, according to a GUTI and a candidate mobile. Manage the identity list of network elements and determine the target converged network device.
  • the device further includes a memory. This memory is used to store program instructions and data necessary for the source mobility management network element. Of course, the memory may not be in the device.
  • the device is a chip system, the device may be composed of a chip, and may also include a chip and other discrete devices, which are not specifically limited in the embodiments of the present application.
  • FIG. 29 shows a first converged network device 290, which is characterized in that the first converged network device 290 includes a transceiver module 2902 and a processing module 2901.
  • the transceiver module 2902 is configured to receive address information of the source mobility management network element from the source mobility management network element in the first network and the GUTI of the terminal in the second network, where the first network and the second network are different types network of.
  • a processing module 2901 is configured to determine, according to the GUTI, that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network.
  • the transceiver module 2902 is further configured to send the address information of the GUTI and the source mobile management network element to the second converged network device according to the address information of the second converged network device, where the address information of the GUTI and the source mobile management network element is used for The terminal switches to the second converged network device.
  • the transceiver module 2902 is configured to send the GUTI and the source mobile management network element address information to the second converged network device according to the address information of the second converged network device, specifically: it is used to send the first Address information and instruction information of the second converged network device, the instruction information is used to instruct the source mobility management network element to send the GUTI and the address information of the source mobile management network element to the second converged network device according to the address information of the second converged network device.
  • the processing module 2901 is configured to determine, according to the GUTI, that the terminal has accessed the second network through a second converged network device capable of providing services to the target access device in the first network, specifically: it is used to determine that the GUTI is not the first A GUTI allocated by a converged network device 290; it is determined that the mobility management resource pool to which the mobility management network element to which the GUTI is allocated is the same as the mobility management resource pool to which the first converged network device 290 belongs as a mobility management network element in the second network, then It is determined that the terminal has accessed the second network through a second converged network device capable of providing services to a target access device in the first network.
  • the processing module 2901 is further configured to obtain address information of the second converged network device according to the GUTI.
  • the processing module 2901 is configured to determine, according to the GUTI, that the terminal has accessed the second network through a second converged network device capable of providing services to the target access device in the first network, specifically: it is used to determine that the GUTI is not the first A GUTI allocated by a converged network device 290; obtaining address information of a target mobile management network element that assigns a GUTI to a terminal, and address information of a candidate mobile management network element capable of providing services to a target access device in a first network; In a case where the information of the mobility management network element is in the address information of the candidate mobility management network element, it is determined that the terminal has accessed the second network through the second converged network device capable of providing services to the target access device in the first network.
  • the processing module 2901 is further configured to determine the address information of the target mobility management network element as the address information of the second converged network device.
  • the processing module 2901 is configured to obtain address information of a candidate mobile management network element capable of providing services to a target access device in the first network. Specifically, the processing module 2901 is configured to receive the first mobile management network element capable of being the first Address information of candidate mobility management network elements that the target access device in the network provides service.
  • the processing module 2901 is configured to obtain address information of a candidate mobile management network element capable of providing services to a target access device in the first network, and is specifically configured to receive a target connection from a source mobile management network element.
  • the first converged network device 290 is presented in the form of dividing each functional module in an integrated manner.
  • the "module” herein may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.
  • the first converged network device 290 may take the form shown in FIG. 6.
  • the processor 601 in FIG. 6 may cause the first converged network device 290 to execute the switching method in the foregoing method embodiment by calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the transceiver module 2902 and the processing module 2901 in FIG. 29 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603.
  • the function / implementation process of the processing module 2901 in FIG. 29 may be implemented by the processor 601 in FIG. 6 calling a computer execution instruction stored in the memory 603, and the function / implementation process of the transceiver module 2902 in FIG. 29 may be performed through the graph.
  • the communication interface 604 in 6 is implemented.
  • the first converged network device 290 provided in this embodiment can perform the foregoing handover method, the technical effects that can be obtained can refer to the foregoing method embodiments, and details are not described herein again.
  • an embodiment of the present application further provides an apparatus (for example, the apparatus may be a chip system), and the apparatus includes a processor, configured to support a first converged network device to implement the foregoing switching method, for example, determining a terminal according to a GUTI The second network was accessed through a second converged network device capable of providing services to a target access device in the first network.
  • the device further includes a memory.
  • the memory is used to store program instructions and data necessary for the first converged network device. Of course, the memory may not be in the device.
  • the device is a chip system, the device may be composed of a chip, and may also include a chip and other discrete devices, which are not specifically limited in the embodiments of the present application.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, a computer, a server, or a data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, and the like that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本申请实施例提供接入方法、切换方法、设备及系统，使得可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入或切换流程。接入方法包括：第一网络中的接入设备接收来自终端的接入请求，接入请求携带第一移动管理标识和第三移动管理标识，第一移动管理标识为第一网络中的第一移动管理网元的标识，第三移动管理标识为由终端在第二网络中的GUTI中的移动管理标识映射得到的在第一网络中的映射移动管理标识；在接入设备根据第一移动管理标识，确定第一移动管理网元和接入设备之间无连接的情况下，接入设备根据第三移动管理标识，确定目标融合网络设备。

Description

接入方法、切换方法、设备及系统
本申请要求于2018年8月7日提交中国国家知识产权局、申请号为201810893346.7、发明名称为“接入方法、切换方法、设备及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及接入方法、切换方法、设备及系统。
背景技术
随着通信技术的发展，现有的终端根据工作状态分为两大类，分别为单注册终端和双注册终端。其中，单注册终端同一时间只能在第四代(4th generation，4G)网络或第五代(5th generation，5G)网络注册，通过网络重选或切换流程在4G网络和5G网络之间进行迁移；双注册终端同一时间可以同时在4G网络和5G网络注册，但不会在4G网络和5G网络之间进行网络重选或切换流程。
也就是说，目前，对于双注册终端，支持同一时间同时在4G网络和5G网络注册，并且可以发生4G网络内的网络重选、4G网络内的切换、5G网络内的网络重选或者5G网络内的切换流程中的一个或多个，但是不支持4G网络和5G网络之间进行网络重选或切换流程。其中，为了实现上述流程，需要在4G网络中部署多个移动管理实体(mobility management entity，MME)，并且需要在5G网络中部署多个接入和移动性管理功能(access and mobility management function，AMF)网元，这显然将提高网络部署的复杂度和网络运维的工作量。
因此，如何在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入或切换流程，是目前亟待解决的问题。
发明内容
本申请实施例提供接入方法、切换方法、设备及系统，使得可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入或切换流程。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供了一种接入方法，该接入方法包括：第一网络中的接入设备接收来自终端的接入请求，该接入请求携带第一移动管理标识和第三移动管理标识，其中，该第一移动管理标识为该第一网络中的第一移动管理网元的标识，该第三移动管理标识为由该终端在该第二网络中的全球唯一的临时标识GUTI中的移动管理标识映射得到的在该第一网络中的映射移动管理标识，其中，该第一网络和该第二网络为不同类型的网络；在该接入设备根据该第一移动管理标识，确定该第一移动管理网元和该接入设备之间无连接的情况下，该接入设备根据该第三移动管理标识，确定目标融合网络设备，其中，该目标融合网络设备作为该第二网络中的移动管理网元时对应的在该第一网络中的映射移动管理标识为该第三移动管理标识，该目标融合网络设备用于该终端接入该第一网络。基于该方案，一方面，由于该接入系统中的目标融合网络设备集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了 网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面，第一网络中的接入设备接收到的接入请求中不仅携带第一网络中的第一移动管理网元的标识，还携带由第二网络中的终端在第二网络中的GUTI中的移动管理标识映射得到的在第一网络中的映射移动管理标识，使得接入设备在根据第一移动管理标识，确定接入设备和第一移动管理网元无连接的情况下，可以根据第三移动管理标识，确定目标融合网络设备，该目标融合网络设备作为第二网络中的移动管理网元时对应的在第一网络中的映射移动管理标识为第三移动管理标识。也就是说，在双注册终端在第二网络中已经选择到一个融合网络设备的情况下，在第一网络中进行重新接入时，也能够保证被选择到相同的融合网络设备，实现双注册终端的重新接入。综上，基于该接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。
在一种可能的设计中，在该第一网络中的接入设备接收来自终端的接入请求之前，该接入方法还包括：该接入设备向该目标融合网络设备发送建立请求，该建立请求用于请求注册到该目标融合网络设备；该接入设备接收来自该目标融合网络设备的建立响应，该建立响应携带第二移动管理标识和该第三移动管理标识，其中，该第二移动管理标识为该目标融合网络设备作为该第一网络中的第二移动管理网元时对应的原始移动管理标识。基于该方案，接入设备可以获取第二移动管理标识和第三移动管理标识。
在一种可能的设计中，该第一网络为第四代4G网络，该第二网络为第五代5G网络；相应的，该第一移动管理标识为第一全球唯一的移动性管理实体标识GUMMEI，该第三移动管理标识为第三GUMMEI。也就是说，基于该方案，可以实现双注册终端在4G网络中的重新接入。
或者，可选的，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一移动管理标识为第一全球唯一的接入和移动管理功能标识GUAMI，该第三移动管理标识为第三GUAMI。也就是说，基于该方案，可以实现双注册终端在5G网络中的重新接入。
第二方面，提供了一种接入方法，该接入方法包括：第一融合网络设备接收来自第一网络中的接入设备的接入请求，该接入请求携带终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该第一融合网络设备根据该GUTI，确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络；该第一融合网络设备向该第二融合网络设备发送该接入请求，该接入请求用于该终端通过该第二融合网络设备接入该第一网络。基于该方案，一方面，由于该接入方法中的融合网络设备(包括第一融合网络设备和第二融合网络设备)均集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面，第一网络中的接入设备向第一融合网络设备发送的接入请求中携带终端在第二网络中的GUTI，使得第一融合网络设备可以根据该GUTI，确定终端曾经通过该接入设备连接的第二融合网络设备接入第二网络，进而第一融合网络设备可以向第二融合网络设备发送接入请求，该接入请求用于终端通过第二融合网络设备接入第一网络。也就是说，在双注册终端在第二网络中已经选择到一个融合网络设备的情况下，在第一网络中进行重新接入时，也能够保证被选择到相同的融合网络设备，实现双注册终端的重新接入。综上，基于该接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注 册终端的重新接入。
在一种可能的设计中，该第一融合网络设备根据该GUTI，确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络，具体为：该第一融合网络设备确定该GUTI不是该第一融合网络设备分配的GUTI；该第一融合网络设备确定分配该GUTI的移动管理网元所属的移动管理资源池与该第一融合网络设备作为该第二网络中的移动管理网元时所属的移动管理资源池相同，则该第一融合网络设备确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络。基于该方案，第一融合网络设备可以确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络。
在一种可能的设计中，该第一融合网络设备根据该GUTI，确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络，具体为：该第一融合网络设备确定该GUTI不是该第一融合网络设备分配的GUTI；该第一融合网络设备获取为该终端分配该GUTI的目标移动管理网元的地址信息，以及能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息；在该目标移动管理网元的信息在该候选移动管理网元的地址信息中的情况下，该第一融合网络设备确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络。基于该方案，第一融合网络设备可以确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络。
在一种可能的设计中，该第一融合网络设备向该第二融合网络设备发送该接入请求，具体为：该第一融合网络设备向该接入设备发送重路由请求消息，该重路由请求消息携带该接入请求和由该GUTI中的第一移动管理标识映射得到的在该第一网络中的映射移动管理标识，其中，该映射移动管理标识用于该接入设备向该第二融合网络设备发送该接入请求。也就是说，第一融合网络设备可以通过接入设备重路由的方式向第二融合网络设备发送接入请求。
在一种可能的设计中，该接入方法还包括：该第一融合网络设备根据该GUTI，获取该第二融合网络设备的地址信息；相应的，该第一融合网络设备向该第二融合网络设备发送该接入请求，具体为：该第一融合网络设备根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该接入请求。也就是说，第一融合网络设备可以直接定向到第二融合网络设备。
在一种可能的设计中，该第一融合网络设备根据该GUTI，获取该第二融合网络设备的地址信息，具体为：该第一融合网络设备发送第一请求消息，该第一请求消息携带由该GUTI中的第一移动管理标识映射得到的在该第一网络中的映射移动管理标识，用于查询该第二融合网络设备的地址信息；该第一融合网络设备接收第一响应消息，该第一响应消息携带该第二融合网络设备的地址信息。基于该方案，第一融合网络设备可以获取第二融合网络设备的地址信息。
在一种可能的设计中，该第一网络为第四代4G网络，该第二网络为第五代5G网络；相应的，该第一融合网络设备发送第一请求消息，具体为：该第一融合网络设备向域名系统DNS服务器发送该第一请求消息；相应的，该第一融合网络设备接收第一响应消息，具体为：该第一融合网络设备接收来自该DNS服务器的该第一响应消息。也就是说，第一融合网络设备可以从DNS服务器查询到第二融合网络设备的地址信息。
在一种可能的设计中，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一融合网络设备发送第一请求消息，具体为：该第一融合网络设备向网络存储功能网元发送该第一请求消息；相应的，该第一融合网络设备接收第一响应消息，具体为：该第一融合网络设备接收来自该网络存储功能网元的该第一响应消息。也就是说，第一融合网络设备可以从 网络存储功能网元查询到第二融合网络设备的地址信息。
在一种可能的设计中，该第一融合网络设备根据该GUTI，获取该第二融合网络设备的地址信息，具体为：该第一融合网络设备发送第二请求消息，该第二请求消息携带该GUTI中的第一移动管理标识，用于查询该第二融合网络设备的地址信息；该第一融合网络设备接收第二响应消息，该第二响应消息携带该第二融合网络设备的地址信息。基于该方案，第一融合网络设备可以获取第二融合网络设备的地址信息。
在一种可能的设计中，该第一网络为4G网络，该第二网络为5G网络；相应的，该第一融合网络设备发送第二请求消息，具体为：该第一融合网络设备向网络存储功能网元发送该第二请求消息；相应的，该第一融合网络设备接收第二响应消息，具体为：该第一融合网络设备接收来自该网络存储功能网元的该第二响应消息。也就是说，第一融合网络设备可以从网络存储功能网元查询到第二融合网络设备的地址信息。
在一种可能的设计中，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一融合网络设备发送第二请求消息，具体为：该第一融合网络设备向DNS服务器发送该第二请求消息；相应的，该第一融合网络设备接收第二响应消息，具体为：该第一融合网络设备接收来自该DNS服务器的该第二响应消息。也就是说，第一融合网络设备可以从DNS服务器查询到第二融合网络设备的地址信息。
在一种可能的设计中，该接入方法还包括：该第一融合网络设备将该目标移动管理网元的地址信息确定为该第二融合网络设备的地址信息；相应的，该第一融合网络设备向该第二融合网络设备发送该接入请求，具体为：该第一融合网络设备根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该接入请求。也就是说，第一融合网络设备可以直接定向到第二融合网络设备。
在一种可能的设计中，该第一融合网络设备获取为该终端分配该GUTI的目标移动管理网元的地址信息，具体为：该第一融合网络设备发送第一请求消息，该第一请求消息携带由该GUTI中的第一移动管理标识映射得到的在该第一网络中的映射移动管理标识，用于查询该目标移动管理网元的地址信息；该第一融合网络设备接收第一响应消息，该第一响应消息携带该目标移动管理网元的地址信息。基于该方案，第一融合网络设备可以获取为该终端分配该GUTI的目标移动管理网元的地址信息。
在一种可能的设计中，该第一网络为4G网络，该第二网络为5G网络；相应的，该第一融合网络设备发送第一请求消息，具体为：该第一融合网络设备向DNS服务器发送该第一请求消息；相应的，该第一融合网络设备接收第一响应消息，具体为：该第一融合网络设备接收来自该DNS服务器的该第一响应消息。也就是说，第一融合网络设备可以从DNS服务器查询到目标移动管理网元的地址信息。
在一种可能的设计中，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一融合网络设备发送第一请求消息，具体为：该第一融合网络设备向网络存储功能网元发送该第一请求消息；相应的，该第一融合网络设备接收第一响应消息，具体为：该第一融合网络设备接收来自该网络存储功能网元的该第一响应消息。也就是说，第一融合网络设备可以从网络存储功能网元查询到目标移动管理网元的地址信息。
在一种可能的设计中，该第一融合网络设备获取为该终端分配该GUTI的目标移动管理网元的地址信息，具体为：该第一融合网络设备发送第二请求消息，该第二请求消息携带该GUTI中的第一移动管理标识，用于查询为该终端分配该GUTI的目标移动管理网元的地址信息；该 第一融合网络设备接收第二响应消息，该第二响应消息携带该目标移动管理网元的地址信息。基于该方案，第一融合网络设备可以获取为该终端分配该GUTI的目标移动管理网元的地址信息。
在一种可能的设计中，该第一网络为4G网络，该第二网络为5G网络；相应的，该第一融合网络设备发送第二请求消息，具体为：该第一融合网络设备向网络存储功能网元发送该第二请求消息；相应的，该第一融合网络设备接收第二响应消息，具体为：该第一融合网络设备接收来自该网络存储功能网元的该第二响应消息。也就是说，第一融合网络设备可以从网络存储功能网元查询到目标移动管理网元的地址信息。
在一种可能的设计中，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一融合网络设备发送第二请求消息，具体为：该第一融合网络设备向DNS服务器发送该第二请求消息；相应的，该第一融合网络设备接收第二响应消息，具体为：该第一融合网络设备接收来自该DNS服务器的该第二响应消息。也就是说，第一融合网络设备可以从DNS服务器查询到目标移动管理网元的地址信息。
在一种可能的设计中，该第一融合网络设备获取能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息，具体为：该第一融合网络设备接收来自该源移动管理网元的该能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息。基于该方案，第一融合网络设备可以获取能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息。
在一种可能的设计中，该第一融合网络设备获取能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息，具体为：该第一融合网络设备接收来自该源移动管理网元的该接入设备的标识、或者该接入设备所服务的跟踪区的标识；该第一融合网络设备根据该接入设备的标识、或者该接入设备所服务的跟踪区的标识，获取能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息。基于该方案，第一融合网络设备可以获取能够为该第一网络中的接入设备提供服务的候选移动管理网元的地址信息。
第三方面，提供了一种切换方法，该切换方法包括：第一网络中的源移动管理网元接收来自该第一网络中的第一接入设备的切换需求，该切换需求携带该第一网络的第二接入设备的标识或者该第二接入设备所服务的跟踪区的标识，以及，该终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该源移动管理网元根据该第二接入设备的标识或者该跟踪区的标识，获取候选移动管理网元的标识列表和地址信息；该源移动管理网元根据该GUTI和该候选移动管理网元的标识列表，确定目标融合网络设备，其中，该目标融合网络设备为该候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；该源移动管理网元根据该候选移动管理网元的地址信息中包括的该目标融合网络设备的地址信息，向该目标融合网络设备发送请求消息，该请求消息用于将该终端切换到该目标融合网络设备。基于该方案，一方面，由于该接入系统中的目标融合网络设备集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面，本申请实施例提供的切换方法中，第一网络中的源移动管理网元接收到的来自第一接入设备的切换需要中不仅携带第一网络的第二接入设备的标识或者第二接入设备所服务的跟踪区的标识，还携 带终端在第二网络中的GUTI，使得源移动管理网元可以根据第二接入设备的标识或者跟踪区的标识，获取候选移动管理网元的标识列表和地址信息，可以根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备，进而可以向目标融合网络设备发送请求消息，该请求消息用于将终端切换到目标融合网络设备。也就是说，在双注册终端在第二网络中已经切换到一个融合网络设备的情况下，在第一网络中进行切换流程时，也能够保证该双注册终端成功切换到相同的融合网络设备。综上，基于该切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。
在一种可能的设计中，该源移动管理网元根据该GUTI和该候选移动管理网元的标识列表，确定目标融合网络设备，具体为：该源移动管理网元确定该GUTI中的第一移动管理标识在该第一网络中的映射移动管理标识；该源移动管理网元将该候选移动管理网元的标识列表中，与该映射移动管理标识相同的标识所对应的融合网络设备确定为该目标融合网络设备。基于该方案，源移动管理网元可以确定目标融合网络设备。
在一种可能的设计中，该第一网络为第四代4G网络，该第二网络为第五代5G网络；相应的，该第一移动管理标识为全球唯一的接入和移动管理功能标识GUAMI，该映射移动管理标识为全球唯一的移动性管理实体标识GUMMEI。也就是说，基于该方案，可以实现双注册终端在4G网络中的切换。
在一种可能的设计中，该第一网络为5G网络，该第二网络为4G网络；相应的，该第一移动管理标识为GUMMEI，该映射移动管理标识为GUAMI。也就是说，基于该方案，可以实现双注册终端在5G网络中的切换。
第四方面，提供了一种切换方法，该切换方法包括：第一融合网络设备接收来自第一网络中的源移动管理网元的该源移动管理网元的地址信息、以及终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该第一融合网络设备根据该GUTI，确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络；该第一融合网络设备根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该GUTI和该源移动管理网元的地址信息，其中，该GUTI和该源移动管理网元的地址信息用于将该终端切换到该第二融合网络设备。基于该方案，一方面，由于该切换方法中的融合网络设备(包括第一融合网络设备和第二融合网络设备)均集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面，本申请实施例提供的切换方法中，第一融合网络设备可以接收来自第一网络中的源移动管理网元的源移动管理网元的地址信息和终端在第二网络中的GUTI，并可以根据该终端在第二网络中的GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备402接入第二网络，进而第一融合网络设备可以向第二融合网络设备发送终端在第二网络中的GUTI和源移动管理网元的地址信息，该终端在第二网络中的GUTI和源移动管理网元的地址信息用于将终端切换到第二融合网络设备。也就是说，在双注册终端在第二网络中已经切换到一个融合网络设备的情况下，在第一网络中进行切换流程时，也能够保证该双注册终端成功切换到相同的融合网络设备。综上，基于该切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。
在一种可能的设计中，该第一融合网络设备根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该GUTI和该源移动管理网元的地址信息，具体为：该第一融合网络设备向该源移动管理网元发送该第二融合网络设备的地址信息和指示信息，该指示信息用于指示该源移动管理网元根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该GUTI和该源移动管理网元的地址信息。也就是说，第一融合网络设备可以通过源移动管理网元定向至第二融合网络设备。
在一种可能的设计中，该第一融合网络设备根据该GUTI，确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络，具体为：该第一融合网络设备确定该GUTI不是该第一融合网络设备分配的GUTI；该第一融合网络设备确定分配该GUTI的移动管理网元所属的移动管理资源池与该第一融合网络设备作为该第二网络中的移动管理网元时所属的移动管理资源池相同，则该第一融合网络设备确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络。基于该方案，第一融合网络设备可以确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络。
在一种可能的设计中，该切换方法还包括：该第一融合网络设备根据该GUTI，获取该第二融合网络设备的地址信息。其中，第一融合网络设备根据该GUTI获取该第二融合网络设备的地址信息的相关描述可参考上述第二方面，在此不再赘述。
在一种可能的设计中，该第一融合网络设备根据该GUTI，确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络，具体为：该第一融合网络设备确定该GUTI不是该第一融合网络设备分配的GUTI；该第一融合网络设备获取为该终端分配该GUTI的目标移动管理网元的地址信息，以及能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息；在该目标移动管理网元的信息在该候选移动管理网元的地址信息中的情况下，该第一融合网络设备确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络；相应的，该切换方法还包括：该第一融合网络设备将该目标移动管理网元的地址信息确定为该第二融合网络设备的地址信息。其中，第一融合网络设备获取为该终端分配该GUTI的目标移动管理网元的地址信息的相关描述可参考上述第二方面，在此不再赘述。基于该方案，第一融合网络设备可以确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络。
在一种可能的设计中，该第一融合网络设备获取能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息，具体为：该第一融合网络设备接收来自该源移动管理网元的该能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息。第一融合网络设备获取能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息。
在一种可能的设计中，该第一融合网络设备获取能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息，具体为：该第一融合网络设备接收来自该源移动管理网元的该目标接入设备的标识、或者该目标接入设备所服务的跟踪区的标识；该第一融合网络设备根据该目标接入设备的标识、或者该目标接入设备所服务的跟踪区的标识，获取能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息。基于该方案，第一融合网络设备获取能够为该第一网络中的目标接入设备提供服务的候选移动管理网元的 地址信息。
第五方面，提供了一种接入设备，该接入设备具有实现上述第一方面所述的方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面，提供了一种接入设备，包括：处理器和存储器；该存储器用于存储计算机执行指令，当该接入设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该接入设备执行如上述第一方面中任一项所述的接入方法。
第七方面，提供了一种接入设备，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述第一方面中任一项所述的接入方法。
第八方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述第一方面中任一项所述的接入方法。
第九方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第一方面中任一项所述的接入方法。
第十方面，提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持接入设备实现上述第一方面中所涉及的功能，例如根据所述第一移动管理标识，确定所述第一移动管理网元和所述接入设备之间无连接的情况下，根据所述第三移动管理标识，确定目标融合网络设备。在一种可能的设计中，该装置还包括存储器，该存储器，用于保存接入设备必要的程序指令和数据。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第五方面至第十方面中任一种设计方式所带来的技术效果可参见第一方面中不同设计方式所带来的技术效果，此处不再赘述。
第十一方面，提供了一种第一融合网络设备，该第一融合网络设备具有实现上述第二方面或第四方面所述的方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十二方面，提供了一种第一融合网络设备，包括：处理器和存储器；该存储器用于存储计算机执行指令，当该第一融合网络设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该第一融合网络设备执行如上述第二方面中任一项所述的接入方法或上述第四方面中任一项所述的切换方法。
第十三方面，提供了一种第一融合网络设备，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述第二方面中任一项所述的接入方法或上述第四方面中任一项所述的切换方法。
第十四方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述第二方面中任一项所述的接入方法或上述第四方面中任一项所述的切换方法。
第十五方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第二方面中任一项所述的接入方法或上述第四方面中任一项所述的切换方法。
第十六方面，提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持第一融合网络设备实现上述第二方面或第四方面中所涉及的功能，例如根据所述GUTI，确定所述终端曾经通过所述接入设备连接的第二融合网络设备接入所述第二网络。在一种可 能的设计中，该装置还包括存储器，该存储器，用于保存第一融合网络设备必要的程序指令和数据。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第十一方面至第十六方面中任一种设计方式所带来的技术效果可参见第二方面或第四方面中不同设计方式所带来的技术效果，此处不再赘述。
第十七方面，提供了一种源移动管理网元，该源移动管理网元具有实现上述第三方面所述的方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十八方面，提供了一种源移动管理网元，包括：处理器和存储器；该存储器用于存储计算机执行指令，当该源移动管理网元运行时，该处理器执行该存储器存储的该计算机执行指令，以使该源移动管理网元执行如上述第三方面中任一项所述的切换方法。
第十九方面，提供了一种源移动管理网元，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述第三方面中任一项所述的切换方法。
第二十方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述第三方面中任一项所述的切换方法。
第二十一方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第三方面中任一项所述的切换方法。
第二十二方面，提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持源移动管理网元实现上述第三方面中所涉及的功能，例如根据所述第二接入设备的标识或者所述跟踪区的标识，获取候选移动管理网元的标识列表和地址信息。在一种可能的设计中，该装置还包括存储器，该存储器，用于保存源移动管理网元必要的程序指令和数据。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第十七方面至第二十二方面中任一种设计方式所带来的技术效果可参见第三方面中不同设计方式所带来的技术效果，此处不再赘述。
第二十三方面，提供了一种接入系统，该接入系统包括融合网络设备和第一网络中的接入设备；其中，该接入设备，用于接收来自终端的接入请求，该接入请求携带第一移动管理标识和第三移动管理标识，其中，该第一移动管理标识为该第一网络中的第一移动管理网元的标识，该第三移动管理标识为由该终端在该第二网络中的全球唯一的临时标识GUTI中的移动管理标识映射得到的在该第一网络中的映射移动管理标识，其中，该第一网络和该第二网络为不同类型的网络；该接入设备，还用于在根据该第一移动管理标识，确定该第一移动管理网元和该接入设备之间无连接的情况下，根据该第三移动管理标识，确定目标融合网络设备，并向该目标融合网络设备发送该接入请求，其中，该目标融合网络设备作为该第二网络中的移动管理网元时对应的在该第一网络中的映射移动管理标识为该第三移动管理标识；该目标融合网络设备，用于接收来自该接入设备的该接入请求，该接入请求用于该终端通过该目标融合网络设备接入该第一网络。
第二十四方面，提供了一种接入系统，该接入系统包括：第一融合网络设备、第二融合网络设备和第一网络中的接入设备；该接入设备，用于向该第一融合网络设备发送接入请求，该接入请求携带终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该第一融合网络设备，用于接收来自该接入设备的该接入请求，并根据该GUTI，确定该终端曾经通过该接入设备连接的第二融合网络设备接入该第二网络；该 第一融合网络设备，还用于向该第二融合网络设备发送该接入请求；该第二融合网络设备，用于接收来自该第一融合网络设备的该接入请求，该接入请求用于该终端通过该第二融合网络设备接入该第一网络。
第二十五方面，提供了一种切换系统，该切换系统包括：第一网络中的第一接入设备、该第一网络中的源移动管理网元、以及目标融合网络设备；该第一接入设备，用于向该源移动管理网元发送切换需求，该切换需求携带该第一网络的第二接入设备的标识或者该第二接入设备所服务的跟踪区的标识，以及，该终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该源移动管理网元，用于接收来自该第一接入设备的该切换需求，并根据该第二接入设备的标识或者该跟踪区的标识，获取候选移动管理网元的标识列表和地址信息；该源移动管理网元，还用于根据该GUTI和该候选移动管理网元的标识列表，确定目标融合网络设备，其中，该目标融合网络设备为该候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；该源移动管理网元，还用于根据该候选移动管理网元的地址信息中包括的该目标融合网络设备的地址信息，向该目标融合网络设备发送请求消息；该目标融合网络设备，还用于接收来自该源移动管理网元的该请求消息，该请求消息用于将该终端切换到该目标融合网络设备。
第二十六方面，提供了一种切换系统，该切换系统包括：第一融合网络设备、第二融合网络设备和第一网络中的源移动管理网元；该源移动管理网元，用于向该第一融合网络设备发送该源移动管理网元的地址信息、以及终端在第二网络中的全球唯一的临时标识GUTI，其中，该第一网络和该第二网络为不同类型的网络；该第一融合网络设备，用于接收来自该源移动管理网元的该源移动管理网元的地址信息、以及该GUTI，并根据该GUTI，确定该终端曾经通过能够为该第一网络中的目标接入设备提供服务的第二融合网络设备接入该第二网络；该第一融合网络设备，还用于根据该第二融合网络设备的地址信息，向该第二融合网络设备发送该GUTI和该源移动管理网元的地址信息；该第二融合网络设备，还用于接收来自该第一融合网络设备的该GUTI和该源移动管理网元的地址信息，其中，该GUTI和该源移动管理网元的地址信息用于将该终端切换到该第二融合网络设备。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1为本申请实施例提供的接入系统的架构示意图一；
图2为本申请实施例提供的接入系统的架构示意图二；
图3为本申请实施例提供的切换系统的架构示意图一；
图4为本申请实施例提供的切换系统的架构示意图二；
图5为本申请实施例提供的一种接入系统或切换系统在4G网络与5G网络中的应用示意图；
图6为本申请实施例提供的通信设备的硬件结构示意图；
图7为现有的4G网络中的MME与E-UTRAN设备的网络部署示意图；
图8为现有的4G网络中的E-UTRAN设备的标识和4G-TAI的格式示意图；
图9为现有的5G网络中的AMF网元与NG-AN设备的网络部署示意图；
图10为现有的5G网络中NG-AN设备的标识和5G-TAI的格式示意图；
图11为现有的4G网络中的GUMMEI与4G-GUTI的格式示意图；
图12为现有的5G网络中的GUAMI与5G-GUTI的格式示意图；
图13为现有的GUMMEI与GUAMI的映射示意图；
图14为本申请实施例提供的接入方法的流程示意图一；
图15为本申请实施例提供的接入方法的流程示意图二；
图16为本申请实施例提供的接入方法的流程示意图三；
图17为本申请实施例提供的接入方法的流程示意图四；
图18为本申请实施例提供的接入方法的流程示意图五；
图19为本申请实施例提供的接入方法的流程示意图六；
图20为本申请实施例提供的切换方法的流程示意图一；
图21为本申请实施例提供的切换方法的流程示意图二；
图22为本申请实施例提供的切换方法的流程示意图三；
图23为本申请实施例提供的切换方法的流程示意图四；
图24为本申请实施例提供的切换方法的流程示意图五；
图25为本申请实施例提供的切换方法的流程示意图六；
图26为本申请实施例提供的一种接入设备的结构示意图；
图27为本申请实施例提供的第一融合网络设备的结构示意图一；
图28为本申请实施例提供的一种源移动管理网元的结构示意图；
图29为本申请实施例提供的第一融合网络设备的结构示意图二。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。其中，在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
此外，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
需要说明的是，本申请下述实施例中所涉及的终端均为双注册终端，该双注册终端是指同一时间可以同时在不同类型的网络进行注册，但是不会在不同类型的网络之间进行网络重选或者切换流程，在此统一说明，以下不再赘述。
如图1所示，为本申请实施例提供的一种接入系统10，该接入系统10包括目标融合网 络设备101和第一网络中的接入设备102。其中，该目标融合网络设备101集成了第一网络中的第三移动管理网元1011的功能和第二网络中的第四移动管理网元1012的功能，可以作为第一网络中的第三移动管理网元1011，也可以作为第二网络中的第四移动管理网元1012；其中，第一网络和第二网络为不同类型的网络，在此统一说明，以下不再赘述。
其中，接入设备102，用于接收来自终端的接入请求，该接入请求携带第一移动管理标识和第三移动管理标识。第一移动管理标识为第一网络中的第一移动管理网元的标识，第三移动管理标识为由该终端在第二网络中的全球唯一的临时标识(globally unique temporary identity，GUTI)中的移动管理标识映射得到的在第一网络中的映射移动管理标识。
接入设备102，还用于在根据第一移动管理标识，确定第一移动管理网元和接入设备102之间无连接的情况下，根据第三移动管理标识，确定目标融合网络设备101，并向目标融合网络设备101发送接入请求，其中，目标融合网络设备101作为第二网络中的第四移动管理网元1012时对应的在第一网络中的映射移动管理标识为第三移动管理标识。
目标融合网络设备101，用于接收来自接入设备的接入请求，该接入请求用于终端通过目标融合网络设备101接入第一网络。
可选的，本申请实施例中的目标融合网络设备101和接入设备102之间可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
可选的，如图2所示，为本申请实施例提供的另一种接入系统20，该接入系统20包括：第一融合网络设备201、第二融合网络设备202和第一网络中的接入设备203。其中，该第一标融合网络设备201集成了第一网络中的第三移动管理网元2011的功能和第二网络中的第四移动管理网元2012的功能，可以作为第一网络中的第三移动管理网元2011，也可以作为第二网络中的第四移动管理网元2012；该第二标融合网络设备202集成了第一网络中的第五移动管理网元2021的功能和第二网络中的第六移动管理网元2022的功能，可以作为第一网络中的第五移动管理网元2021，也可以作为第二网络中的第六移动管理网元2022；其中，第一网络和第二网络为不同类型的网络，在此统一说明，以下不再赘述。
其中，接入设备203，用于向第一融合网络设备201发送接入请求，该接入请求携带终端在第二网络中的GUTI。
第一融合网络设备201，用于接收来自接入设备203的接入请求，并根据GUTI，确定终端曾经通过接入设备203连接的第二融合网络设备202接入第二网络。
第一融合网络设备201，还用于向第二融合网络设备202发送接入请求。
第二融合网络设备202，用于接收来自第一融合网络设备201的接入请求，该接入请求用于终端通过第二融合网络设备202接入第一网络。
可选的，本申请实施例中的第一融合网络设备201、第二融合网络设备202和接入设备203中的任意两个设备之间可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
基于图1或图2所示的实施例提供的接入系统，一方面，由于该接入系统中的融合网络设备(比如图1中的目标融合网络设备，或者图2中的第一融合网络设备和第二融合网络设备)均集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面， 图1所示的实施例提供的接入系统中，第一网络中的接入设备接收到的接入请求中不仅携带第一网络中的第一移动管理网元的标识，还携带由第二网络中的终端在第二网络中的GUTI中的移动管理标识映射得到的在第一网络中的映射移动管理标识，使得接入设备在根据第一移动管理标识，确定接入设备和第一移动管理网元无连接的情况下，可以根据第三移动管理标识，确定目标融合网络设备，该目标融合网络设备作为第二网络中的第四移动管理网元时对应的在第一网络中的映射移动管理标识为第三移动管理标识；图2所示的实施例提供的接入系统中，第一网络中的接入设备向第一融合网络设备发送的接入请求中携带终端在第二网络中的GUTI，使得第一融合网络设备可以根据该GUTI，确定终端曾经通过该接入设备连接的第二融合网络设备接入第二网络，进而第一融合网络设备可以向第二融合网络设备发送接入请求，该接入请求用于终端通过第二融合网络设备接入第一网络。也就是说，基于图1或图2所示的实施例提供的接入系统，在双注册终端在第二网络中已经选择到一个融合网络设备的情况下，在第一网络中进行重新接入时，也能够保证被选择到相同的融合网络设备，实现双注册终端的重新接入。综上，基于图1或图2所示的实施例提供的接入系统，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。
可选的，如图3所示，为本申请实施例提供的一种切换系统30，该切换系统30包括：目标融合网络设备301、第一网络中的第一接入设备302和第一网络中的源移动管理网元303。其中，该目标融合网络设备301集成了第一网络中的第三移动管理网元3011的功能和第二网络中的第四移动管理网元3012的功能，可以作为第一网络中的第三移动管理网元3011，也可以作为第二网络中的第四移动管理网元3012；其中，第一网络和第二网络为不同类型的网络，在此统一说明，以下不再赘述。
其中，第一接入设备302，用于向源移动管理网元303发送切换需求，该切换需求携带第一网络的第二接入设备的标识或者第二接入设备所服务的跟踪区的标识，以及，终端在第二网络中的GUTI。
源移动管理网元303，用于接收来自第一接入设备302的切换需求，并根据第二接入设备的标识或者跟踪区的标识，获取候选移动管理网元的标识列表和地址信息。
源移动管理网元303，还用于根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备301，其中，目标融合网络设备301为候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；
源移动管理网元303，还用于根据候选移动管理网元的地址信息中包括的目标融合网络设备301的地址信息，向目标融合网络设备301发送请求消息。
目标融合网络设备301，还用于接收来自源移动管理网元303的请求消息，该请求消息用于将终端切换到目标融合网络设备301。
可选的，本申请实施例中的目标融合网络设备301、第一接入设备302和源移动管理网元303中的任意两个设备之间可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
可选的，如图4所示，为本申请实施例提供的一种切换系统40，该切换系统40包括：第一融合网络设备401、第二融合网络设备402和第一网络中的源移动管理网元403。其中，该第一标融合网络设备401集成了第一网络中的第三移动管理网元4011的功能和第二网络中的第四移动管理网元4012的功能，可以作为第一网络中的第三移动管理网元4011，也可以作为第二网络中的第四移动管理网元4012；该第二标融合网络设备402集成了第一网络中的 第五移动管理网元4021的功能和第二网络中的第六移动管理网元4022的功能，可以作为第一网络中的第五移动管理网元4021，也可以作为第二网络中的第六移动管理网元4022；其中，第一网络和第二网络为不同类型的网络，在此统一说明，以下不再赘述。
其中，源移动管理网元403，用于向第一融合网络设备401发送源移动管理网元403的地址信息、以及终端在第二网络中的GUTI。
第一融合网络设备401，用于接收来自源移动管理网元403的源移动管理网元的地址信息和终端在第二网络中的GUTI，并根据该GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备402接入第二网络；
第一融合网络设备，还用于根据第二融合网络设备402的地址信息，向第二融合网络设备发送终端在第二网络中的GUTI和源移动管理网元403的地址信息；
第二融合网络设备402，还用于接收来自第一融合网络设备的终端在第二网络中的GUTI和源移动管理网元403的地址信息，其中，终端在第二网络中的GUTI和源移动管理网元403的地址信息用于将终端切换到第二融合网络设备402。
可选的，本申请实施例中的第一融合网络设备401、第二融合网络设备402和源移动管理网元403中的任意两个设备之间可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
基于图3或图4所示的实施例提供的切换系统，一方面，由于该切换系统中的融合网络设备(比如图3中的目标融合网络设备，或者图4中的第一融合网络设备和第二融合网络设备)均集成了第一网络中的移动管理网元的功能和第二网络中的移动管理网元的功能，因此不仅减少了网络中的设备个数，简化了网络运维的工作量；并且也减少了网络地址资源，简化了网络规划和部署的复杂度；而且，还可以灵活的根据第一网络和第二网络的业务量调整对硬件资源的占用比例，共享硬件资源，从而提升资源利用效率和投资回报率。另一方面，图3所示的实施例提供的切换系统中，第一网络中的源移动管理网元接收到的来自第一接入设备的切换需要中不仅携带第一网络的第二接入设备的标识或者第二接入设备所服务的跟踪区的标识，还携带终端在第二网络中的GUTI，使得源移动管理网元可以根据第二接入设备的标识或者跟踪区的标识，获取候选移动管理网元的标识列表和地址信息，可以根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备，进而可以向目标融合网络设备发送请求消息，该请求消息用于将终端切换到目标融合网络设备；图4所示的实施例提供的切换系统中，第一融合网络设备可以接收来自第一网络中的源移动管理网元的源移动管理网元的地址信息和终端在第二网络中的GUTI，并可以根据该终端在第二网络中的GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备402接入第二网络，进而第一融合网络设备可以向第二融合网络设备发送终端在第二网络中的GUTI和源移动管理网元的地址信息，该终端在第二网络中的GUTI和源移动管理网元的地址信息用于将终端切换到第二融合网络设备。也就是说，基于图3或图4所示的实施例提供的切换系统，在双注册终端在第二网络中已经切换到一个融合网络设备的情况下，在第一网络中进行切换流程时，也能够保证该双注册终端成功切换到相同的融合网络设备。综上，基于图3或图4所示的实施例提供的切换系统，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。
可选的，图1至图4所示的实施例中的第一网络可以为4G网络，第二网络可以为5G网络；或者，本申请实施例中的第一网络可以为5G网络，第二网络可以4G网络；或者，本申 请实施例中的第一网络和第二网络还可以为其他网络，本申请实施例对此不作具体限定。
示例性的，在第一网络为4G网络，第二网络为5G网络；或者，第二网络为4G网络，第一网络为5G网络的场景下，如图5所示，融合网络设备集成了4G中的MME的功能和5G网络中的AMF网元的功能。在融合网络设备作为MME的情况下，对应的接入设备为4G网络中的演进型通用陆地无线接入网(evolved universal terrestrial radio access network，E-UTRAN)设备；在融合网络设备作为AMF网元的情况下，对应的接入设备为5G网络中的下一代无线接入网(next generation-access network，NG-AN)设备。其中，该融合网络设备例如可以是图1或图3中的目标融合网络设备，或者图2或图4中的第一融合网络设备，或者图2或图4中的第二融合网络设备等，本申请实施例对此不作具体限定。
此外，如图5所示，该接入系统或切换系统中还可以包括MME和AMF网元中的一个或多个，本申请实施例对此不作具体限定。例如，在第一网络为4G网络，第二网络为5G网络时，图3或图4中的源移动管理网元所对应的网络或者实体可以为图5中的MME；或者，在第一网络为5G网络，第二网络为4G网络时，图3或图4中的源移动管理网元所对应的网络或者实体可以为图5中的AMF网元，本申请实施例对此不作具体限定。
其中，本申请实施中的融合网络设备配置“统一对等网元接口的本端地址”。在融合网络设备作为AMF网元与AMF网元通信的情况下，该本端地址作为N14接口地址；在融合网络设备作为AMF网元与MME网元通信的情况下，该本端地址作为N26接口地址；在融合网络设备作为MME与AMF网元通信的情况下，该本端地址作为N26接口地址；在融合网络设备作为MME与MME通信的情况下，该本端地址作为S10接口地址。
其中，融合网络设备配置“统一无线设备接口的本端地址”。在融合网络设备作为AMF网元与NG-AN设备通信的情况下，该本端地址作为N2接口地址；在融合网络设备作为MME与E-UTRAN设备通信的情况下，该本端地址作为S1-MME接口地址。
此外，E-UTRAN设备还可以通过S1-MME接口与MME通信，NG-AN设备还可以通过N2接口与AMF网元通信，具体可参考现有的4G网络和5G网络的描述，在此不予赘述。
需要说明的是，图5仅是示例性的以接入系统或切换系统中包括一个融合网络设备为例进行说明。当然，接入系统或切换系统中可以包括一个或多个融合网络设备，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以融合网络设备作为MME时与一个E-UTRAN设备连接为例进行说明。当然，融合网络设备作为MME时可以与一个或多个E-UTRAN设备连接，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以融合网络设备作为MME时与一个AMF网元或者MME连接为例进行说明。当然，融合网络设备作为MME时可以与一个或多个MME连接，或者，融合网络设备作为MME时可以与一个或多个AMF网元连接，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以融合网络设备作为AMF网元时与一个NG-AN设备连接为例进行说明。当然，融合网络设备作为AMF网元时可以与一个或多个NG-AN设备连接，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以融合网络设备作为AMF网元时与一个AMF网元或者MME连接为例进行说明。当然，融合网络设备作为AMF网元时可以与一个或多个MME连接，或者，融合网络设备作为AMF网元时可以与一个或多个AMF网元连接，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以E-UTRAN设备与一个融合网络设备连接为例进行说明。当然，E-UTRAN设备还可以与其他融合网络设备或者MME连接，本申请实施例对此不作具体限定。
需要说明的是，图5仅是示例性的以NG-AN设备与一个融合网络设备连接为例进行说明。当然，NG-AN设备还可以与其他融合网络设备或者AMF网元连接，本申请实施例对此不作具体限定。
可选的，本申请实施例中所涉及到的终端(terminal)可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备；还可以包括用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板型电脑、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、无绳电话(cordless phone)或者无线本地环路(wireless local loop，WLL)台、机器类型通信(machine type communication，MTC)终端、用户设备(user equipment，UE)，移动台(mobile station，MS)，终端设备(terminal device)或者中继用户设备等。其中，中继用户设备例如可以是5G家庭网关(residential gateway，RG)。为方便描述，本申请中，上面提到的设备统称为终端。
可选的，本申请实施例中所涉及的接入设备、或者第一接入设备、或者第二接入设备指的是接入核心网的设备，例如可以是基站，宽带网络业务网关(broadband network gateway，BNG)，汇聚交换机，非第三代合作伙伴计划(3rd generation partnership project，3GPP)接入设备等。基站可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等。
可选的，本申请实施例图1中的接入设备、图2中的第一融合网络设备、图3中的源移动管理网元或者图4中的第一融合网络设备可以由一个设备实现，也可以由多个设备共同实现，还可以是一个设备内的一个功能模块，本申请实施例对此不作具体限定。可以理解的是，上述功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
例如，本申请实施例图1中的接入设备、图2中的第一融合网络设备、图3中的源移动管理网元或者图4中的第一融合网络设备可以通过图6中的通信设备来实现。图6所示为本申请实施例提供的通信设备的硬件结构示意图。该通信设备600包括处理器601，通信线路602，存储器603以及一个或多个通信接口(图6中仅是示例性的以通信接口604进行说明)。
处理器601可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路602可包括一通路，在上述组件之间传送信息。
通信接口604，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。
存储器603可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically  erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路602与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器603用于存储执行本申请方案的计算机执行指令，并由处理器601来控制执行。处理器601用于执行存储器603中存储的计算机执行指令，从而实现本申请下述实施例提供的接入方法或切换方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器601可以包括一个或多个CPU，例如图6中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信设备600可以包括多个处理器，例如图6中的处理器601和处理器608。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信设备600还可以包括输出设备605和输入设备606。输出设备605和处理器601通信，可以以多种方式来显示信息。例如，输出设备605可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备606和处理器601通信，可以以多种方式接收用户的输入。例如，输入设备606可以是鼠标、键盘、触摸屏设备或传感设备等。
上述的通信设备600可以是一个通用设备或者是一个专用设备。在具体实现中，通信设备600可以是台式机、便携式电脑、网络服务器、掌上电脑(personal digital assistant，PDA)、移动手机、平板电脑、无线终端设备、嵌入式设备或有图6中类似结构的设备。本申请实施例不限定通信设备600的类型。
下面将结合图1至图6对本申请实施例提供的接入方法或切换方法进行具体阐述。
需要说明的是，本申请下述实施例中各个网元之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。
为了便于理解下述实施例中的方案，首先给出相关简介如下。
第一，4G网络中的E-UTRAN设备的标识与4G网络中的E-UTRAN设备所服务的跟踪区的标识(tracking area identity，TAI)(以下简称4G-TAI)：
在4G网络中，每个MME会连接多个E-UTRAN设备，这些E-UTRAN设备覆盖一组跟踪区(tracking area，TA)，表示了一个4G无线网络的覆盖区域。比如，如图7所示，MME11可以分别与E-UTRAN11设备和E-UTRAN12设备连接，MME12可以分别与E-UTRAN11设备和E-UTRAN12设备连接，其中，E-UTRAN11设备和E-UTRAN12设备等可以覆盖位置区域1，位置区域1包括TA11，TA12，……TA1n。MME21可以分别与E-UTRAN21设备和E-UTRAN22设备连接，MME22可以分别与E-UTRAN21设备和E-UTRAN22设备连接，其中，E-UTRAN21设备和E-UTRAN22设备等可以覆盖位置区域2，位置区域2包括TA21，TA22，……TA2m。其中，m和n均为整数。
其中，4G-TA的全局唯一标识称为4G-TAI，其组成结构如图8所示，包括移动国家码(mobile country code，MCC)和移动网码(mobile network code，MNC)、以及16bit的跟踪区码(tracking area code，TAC)。其中，MCC标识了运营商所属的国家；MNC则是运营商的网络标识；TAC在MCC+MNC下唯一标识一个位置区域。
E-UTRAN设备的标识可以记作全球(global)演进型基站(enodeB，eNB)标识(identifier，ID)，其组成结构如图8所示，包括MCC、MNC、以及18bit、20bit、21bit或28bit的eNB ID。其中,MCC标识了运营商所属的国家；MNC则是运营商的网络标识；eNB ID在MCC+MNC下唯一标识一个E-UTRAN设备。
第二，5G网络中的NG-AN设备的标识与5G网络中的NG-AN设备所服务的TAI(以下简称5G-TAI)：
在5G网络中，每个AMF网元会连接多个NG-AN设备，这些NG-AN设备覆盖一组TA，表示了一个5G无线网络的覆盖区域。比如，如图9所示，AMF11网元可以分别与NG-AN11设备和NG-AN12设备连接，AMF12网元可以分别与NG-AN11设备和NG-AN12设备连接，其中，NG-AN11设备和NG-AN设备等可以覆盖位置区域1，位置区域1包括TA11，TA12，……TA1n。AMF21网元可以分别与NG-AN21设备和NG-AN22设备连接，AMF22网元可以分别与NG-AN21设备和NG-AN22设备连接，其中，NG-AN21设备和NG-AN22设备等可以覆盖位置区域2，位置区域2包括TA21，TA22，……TA2m。
其中，5G-TA的全局唯一标识称为5G-TAI，其组成结构如图10所示，包括MCC和MNC、以及24bit的TAC。其中，MCC标识了运营商所属的国家；MNC则是运营商的网络标识；TAC在MCC+MNC下唯一标识一个位置区域。
NG-AN设备的标识可以记作全球(global)AN设备ID，其组成结构如图10所示，包括MCC、MNC、以及18bit-32bit的AN设备ID。其中,MCC标识了运营商所属的国家；MNC则是运营商的网络标识；AN设备ID下唯一标识一个NG-AN设备。
由上述描述可知，4G网络与5G网络相比：4G-TAC比5G-TAC少8bit，即一个字节；4G网络的全球eNB ID与5G网络的全球AN设备ID的长度范围有差异。
第三，4G网络中的全球唯一的MME标识(globally unique MME identifier，GUMMEI)与4G-GUTI：
4G网络中的GUMMEI与4G-GUTI的格式如图11所示。其中，GUMMEI由MME对应的MCC和MNC、16bit的MME组标识(MME group ID)，以及8bit的MME码(MME code)组成。4G-GUTI由GUMMEI以及32bit的MME临时移动用户识别号(MME-temporary mobile subscriber identity，M-TMSI)组成。
其中，MCC标识了运营商所属的国家；MNC则是运营商的网络标识；MME group ID表示了服务于相同跟踪区(tracking area，TA)范围的一组MME，这组MME也被称为MME池(MME pool)；MME code在MME pool中唯一标识一个MME。其中，MME group ID和MME code合并在一起称为MME标识(MME identifier，MMEI)，在一组MCC与MNC下唯一。
第四，5G网络中的全球唯一的AMF标识(globally unique AMF identifier，GUAMI)与5G-GUTI：
5G网络中的GUAMI与5G-GUTI的格式如图12所示。其中，GUAMI由AMF网元对应的MCC和MNC、8bit的AMF区域标识(AMF region ID)，10bit的AMF集合标识(AMF set ID)以及6bit的AMF指针(AMF pointer)组成。5G-GUTI由GUAMI以及32bit的5G-TMSI组成。
其中，MCC标识了运营商所属的国家；MNC则是运营商的网络标识；AMF region ID和AMF set ID合并在一起表示了服务于相同TA范围的一组AMF网元，这组AMF网元也被称为AMF池(AMF pool)；AMF region ID、AMF set ID和AMF pointer合并在一起称为AMF标识(AMF identifier，AMI)，在一组MCC与MNC下唯一。AMF region ID在一组MCC与MNC下唯一，AMF set ID在AMF region ID下唯一。
第五，目前3GPP协议定义的GUAMI和GUMMEI之间的映射方法如下：
GUAMI中的MCC映射为GUMMEI中的MCC，GUAMI中的MNC映射为GUMMEI中MNC；GUAMI中的AMF区域标识映射为GUMMEI中的MME组标识的高8bit位；GUAMI中的AMF集合标识中的高8bit位映射为GUMMEI中的MME组标识的低8bit位；GUAMI中的AMF集合标识中的低2bit位映射为GUMMEI中的MME码的高2bit位；GUAMI中的AMF指针映射为GUMMEI中的MME码的低6bit位。其中，映射结果如图13所示。
下面将结合上述描述给出本申请实施例提供的接入方法或切换方法的具体阐述。
可选的，以图1所示的接入系统中的第一网络为4G网络，第二网络为5G网络，E-UTRAN设备首次能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图14所示，为本申请实施例提供的一种接入方法，该接入方法包括如下步骤：
S1401、E-UTRAN设备向融合网络设备发送S1建立请求(S1 setup request)消息，以使得融合网络设备接收来自E-UTRAN设备的S1建立请求消息。
其中，该S1建立请求消息用于请求注册到融合网络设备。
S1402、融合网络设备向E-UTRAN设备发送S1建立响应(S1 setup response)消息，以使得E-UTRAN设备接收来自融合网络设备的S1建立响应消息。
其中，该S1建立响应消息携带两组GUMMEI。一组GUMMEI是融合网络设备作为MME时对应的GUMMEI，记作原始(native)GUMMEI，代表了4G网络设备；一组GUMMEI是由融合网络设备作为AMF网元时对应的原始(native)GUAMI映射得到的GUMMEI，记作映射(mapped)GUMMEI，代表了5G网络设备。
可选的，本申请实施例中，网络中的AMF pool与MME pool可以各自独立规划。比如，在融合网络设备上分别配置自己所属的原始GUAMI和原始GUMMEI。或者，本申请实施例中，融合网络设备作为MME时对应原始GUMMEI和融合网络设备作为AMF网元时对应的原始GUAMI也可以通过其他方式获得，比如可以给融合网络设备配置一个或多个全球唯一标识，该原始GUAMI和原始GUMMEI可以由该融合网络设备对应的一个或多个全球唯一标识映射得到，本申请实施例对此不作具体限定。
其中，本申请实施例中的原始GUAMI按照现有技术映射得到的映射GUMMEI，不与网络中任意MME的GUMMEI相同，也不与网络中其它AMF网元的原始GUAMI按照现有技术映射得到的GUMMEI相同，在此统一说明，以下不再赘述。
可选的，本申请实施例中，一组GUMMEI中的不同GUMMEI可以属于一个MME pool，即MCC、MNC和MME组标识均相同；也可以属于多个MME pool，即MCC、MNC或MME Group ID中的一个或多个不相同，本申请实施例对此不作具体限定。
可选的，本申请实施例中，该S1建立响应消息还可以携带融合网络设备作为MME时对应的权重信息，该权重信息可以是根据融合网络设备的权重信息确定出的，比如，融合网络设备的权重信息按照一定比例映射为融合网络设备作为MME时对应的权重信息，本申请实施例对此不作具体限定。
需要说明的是，本申请实施例中，融合网络设备的权重信息表征了融合网络设备在融合网络设备所属的融合网络设备池中相比其它融合网络设备的处理能力。通常，处理能力越大，融合网络设备的权重越高，在此统一说明，以下不再赘述。
需要说明的是，上述步骤S1401-S1402为可选的步骤，仅是示例性的以E-UTRAN设备与其中一个连接的融合网络设备交互，获取该融合网络设备对应的两组GUMMEI为例进行说明。当然，该E-UTRAN设备也可以连接其他的融合网络设备或者MME，其中，与其他融合网络设备交互以获取该融合网络设备对应的两组GUMMEI的方式可参考上述步骤S1401-S1402；与MME交互以获取MME对应的原始GUMMEI的方式可参考现有技术，在此不再赘述。进而，在E-UTRAN设备获取所连接的一个或多个融合网络设备或者MME反馈的原始GUMMEI之后，E-UTRAN设备可以根据该E-UTRAN设备所连接的一个或多个融合网络设备或者MME反馈的原始GUMMEI，确定以下网络拓扑关系：
第一，该E-UTRAN设备所连接的MME pool的个数，以及每个MME pool对应的MCC、MNC以及MME group ID。
第二，每个MME pool下MME个数，以及每个MME的MME code和通信地址。
S1403、终端向E-UTRAN设备发送附着(attach)/跟踪区更新(tracking area update，TAU)请求消息，以使得E-UTRAN设备接收来自终端的附着/TAU请求消息。
其中，若该终端首次接入4G网络，则附着/TAU请求消息的消息体中不包含原始(old)GUTI，消息头中也无分配old GUTI的old MME的GUMMEI；若终端之前已经从4G网络接入过，则附着/TAU请求消息的消息体中包含原来接入的4G网络中的old MME分配的4G-GUTI作为old GUTI，该4G-GUTI中包含了分配该4G-GUTI的old MME的GUMMEI，记作第一GUMMEI。另外，附着/TAU请求消息的消息头中包含了该第一GUMMEI。
此外，本申请实施例中，若该终端保存有有效的5G-GUTI，则该附着/TAU请求消息还包括由该5G-GUTI中的GUAMI按照图12所示的映射方法映射得到的在4G网络中的第三GUMMEI。
S1404、在E-UTRAN设备根据第一GUMMEI，确定第一GUMMEI对应的old MME与E-UTRAN设备无连接的情况下，E-UTRAN设备根据第三GUMMEI，确定目标融合网络设备为图14中的融合网络设备。
具体的，E-UTRAN设备接收到附着/TAU请求消息之后，将附着/TAU请求消息的消息头中的信息与之前保存的自己连接的各MME的GUMMEI进行比较，判断该终端原先接入的old MME是否与自己有连接。如果有连接，则选择该old MME重新接入；否则，E-UTRAN设备根据第三GUMMEI，确定目标融合网络设备。其中，本申请实施例示例性的以old MME与E-UTRAN设备无连接，E-UTRAN设备确定步骤S1402中融合网络设备反馈的映射GUMMEI中包括第三GUMMEI，从而确定目标融合网络设备为图14中的融合网络设备为例进行说明。也就是说，本申请实施例中，目标融合网络设备作为5G网络中的AMF网元时对应的在4G网络中的映射GUMMEI为第三GUMMEI。
S1405、E-UTRAN设备向融合网络设备发送附着/TAU请求消息，以使得融合网络设备接收来自E-UTRAN设备的附着/TAU请求消息。
本申请实施例中，E-UTRAN设备向融合网络设备发送附着/TAU请求消息时，还可以在附着/TAU请求消息的消息头中增加该E-UTRAN设备的标识或者该E-UTRAN设备所服务的跟踪区的标识，具体可参考现有的实现方式，在此不予赘述。其中，该E-UTRAN设备的标识以及该E-UTRAN设备所服务的跟踪区的标识的相关描述可参考图8所示的实施例，在此不再赘述。
S1406、融合网络设备向E-UTRAN设备发送附着/TAU接受(accept)消息，以使得E-UTRAN设备接收来自融合网络设备的附着/TAU接受消息。其中，该附着/TAU接受消息携带新分配的4G-GUTI，该新分配的4G-GUTI可以唯一关联到一个从4G网络接入的终端的上下文。
S1407、E-UTRAN设备向终端发送附着/TAU接受消息，以使得终端接收来自E-UTRAN设备的附着/TAU接受消息。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1401至S1407中的E-UTRAN设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图1所示的接入系统中的第一网络为5G网络，第二网络为4G网络，NG-AN设备首次能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图15所示，为本申请实施例提供的另一种接入方法，该接入方法包括如下步骤：
S1501、NG-AN设备向融合网络设备发送NG建立请求(NG setup request)消息，以使得融合网络设备接收来自NG-AN设备的NG建立请求消息。
其中，该NG建立请求消息用于请求注册到融合网络设备。
S1502、融合网络设备向NG-AN设备发送NG建立响应(NG setup response)消息，以使得NG-AN设备接收来自融合网络设备的NG建立响应消息。
其中，该NG建立响应消息携带两组GUAMI。一组GUAMI是融合网络设备作为AMF网元时对应的GUAMI，记作原始GUAMI，代表了5G网络设备；一组GUAMI是由融合网络设备作为MME网元时对应的原始GUMMEI映射得到的GUAMI，记作映射GUAMI，代表了4G网络设备。
可选的，本申请实施例中，网络中的AMF pool与MME pool可以各自独立规划。比如，在融合网络设备上分别配置自己所属的原始GUAMI和原始GUMMEI。或者，本申请实施例中，融合网络设备作为MME时对应原始GUMMEI和融合网络设备作为AMF网元时对应的原始GUAMI也可以通过其他方式获得，比如可以给融合网络设备配置一个或多个全球唯一标识，该原始GUAMI和原始GUMMEI可以由该融合网络设备对应的一个或多个全球唯一标识映射得到，本申请实施例对此不作具体限定。
其中，本申请实施例中的原始GUMMEI按照现有技术映射得到的映射GUAMI，不与网络中任意MME的GUAMI相同，也不与网络中其它MME的原始GUMMEI按照现有技术映射得到的GUAMI相同，在此统一说明，以下不再赘述。
可选的，本申请实施例中，一组GUAMI中的不同GUAMI可以属于一个AMF pool，即MCC、MNC、AMF region ID和AMF set ID均相同；也可以属于多个AMF pool，即MCC、MNC、AMF region ID和AMF set ID中的一个或多个不相同，本申请实施例对此不作具体限定。
可选的，本申请实施例中，该NG建立响应消息还可以携带融合网络设备作为AMF网元时对应的权重信息，该权重信息可以是根据融合网络设备的权重信息确定出的，比如，融合网络设备的权重信息按照一定比例映射为融合网络设备作为AMF网元时对应的权重信息，本申请实施例对此不作具体限定。
需要说明的是，本申请实施例中，融合网络设备的权重信息表征了融合网络设备在融合网络设备所属的融合网络设备池中相比其它融合网络设备的处理能力。通常，处理能力越大， 融合网络设备的权重越高，在此统一说明，以下不再赘述。
需要说明的是，上述步骤S1501-S1502为可选的步骤，仅是示例性的以NG-AN设备与其中一个连接的融合网络设备交互，获取该融合网络设备对应的两组GUAMI为例进行说明。当然，该NG-AN设备也可以连接其他的融合网络设备或者AMF网元，其中，与其他融合网络设备交互以获取该融合网络设备对应的两组GUAMI的方式可参考上述步骤S1501-S1502；与AMF网元交互以获取该AMF网元对应的原始GUAMI的方式可参考现有技术，在此不再赘述。进而，在NG-AN设备获取所连接的一个或多个融合网络设备或者AMF网元反馈的原始GUAMI之后，NG-AN设备可以根据该NG-AN设备所连接的一个或多个融合网络设备或者AMF网元反馈的原始GUAMI，确定以下网络拓扑关系：
第一，该NG-AN设备所连接的AMF pool的个数，以及每个AMF pool对应的MCC、MNC AMF region ID和AMF set ID。
第二，每个AMF pool下AMF网元的个数，以及每个AMF网元的AMF pointer和通信地址。
S1503、终端向NG-AN设备发送注册请求(registration request)消息，以使得NG-AN设备接收来自终端的注册请求消息。
其中，若该终端首次接入5G网络，则注册请求消息的消息体中不包含原始(old)GUTI，消息头中也无分配old GUTI的old AMF网元的GUAMI；若终端之前已经从5G网络接入过，则注册请求消息的消息体中包含原来接入的5G网络中的old AMF网元分配的5G-GUTI作为old GUTI，该5G-GUTI中包含了分配该5G-GUTI的old AMF网元的GUAMI，记作第一GUAMI。另外，注册请求消息的消息头中包含了该第一GUAMI。
此外，本申请实施例中，若该终端保存有有效的4G-GUTI，则该注册请求消息还携带由该4G-GUTI中的GUMMEI按照图12所示的映射方法映射得到的在5G网络中的第三GUAMI。
S1504、在NG-AN设备根据第一GUAMI，确定第一GUAMI对应的old AMF网元与NG-AN设备无连接的情况下，NG-AN设备根据第三GUAMI，确定目标融合网络设备为图15中的融合网络设备。
具体的，NG-AN设备接收到注册请求消息之后，将注册请求消息的消息头中的信息与之前保存的自己连接的各AMF网元的GUAMI进行比较，判断该终端原先接入的old AMF网元是否与自己有连接。如果有连接，则选择该old AMF网元重新接入；否则，NG-AN设备根据第三GUAMI，确定目标融合网络设备。其中，本申请实施例示例性的以old AMF网元与NG-AN设备无连接，NG-AN设备确定步骤S1502中融合网络设备反馈的映射GUAMI中包括第三GUAMI，从而确定目标融合网络设备为图15中的融合网络设备为例进行说明。也就是说，本申请实施例中，目标融合网络设备作为4G网络中的MME时对应的在5G网络中的映射GUAMI为第三GUAMI。
S1505、NG-AN设备向融合网络设备发送注册请求消息，以使得融合网络设备接收来自NG-AN设备的注册请求消息。
其中，本申请实施例中，NG-AN设备向融合网络设备发送注册请求消息时，还可以在注册请求消息的消息头中增加该NG-AN设备的标识或者该NG-AN设备所服务的跟踪区的标识，具体可参考现有的实现方式，在此不予赘述。其中，该NG-AN设备的标识以及该NG-AN设备所服务的跟踪区的标识的相关描述可参考图10所示的实施例，在此不再赘述。
S1506、融合网络设备向NG-AN设备发送注册接受消息，以使得NG-AN设备接收来自融合网络设备的注册接受消息。其中，该注册接受消息携带新分配的5G-GUTI，该新分配的5G-GUTI可以唯一关联到一个从5G网络接入的终端的上下文。
S1507、NG-AN设备向终端发送注册接受消息，以使得终端接收来自NG-AN设备的注册接受消息。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1501至S1507中的NG-AN设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图2所示的接入系统中的第一网络为4G网络，第二网络为5G网络，E-UTRAN设备对MME的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图16所示，为本申请实施例提供的一种接入方法，该接入方法包括如下步骤：
S1601a-S1602a、与图14所示的实施例中的步骤S1401-S1402类似，区别比如在于将步骤S1401-S1402中的融合网络设备替换为本申请实施例中的第一融合网络设备；将步骤S1401-S1402中的S1建立请求消息替换为本申请实施例中的S1建立请求消息1；将步骤S1401-S1402中的S1建立响应消息替换为本申请实施例中的S1建立请求响应1；其余相关描述可参考图14所示的实施例，在此不再赘述。
S1601b-S1602b、与图14所示的实施例中的步骤S1401-S1402类似，区别比如在于将步骤S1401-S1402中的融合网络设备替换为本申请实施例中的第二融合网络设备；将步骤S1401-S1402中的S1建立请求消息替换为本申请实施例中的S1建立请求消息2；将步骤S1401-S1402中的S1建立响应消息替换为本申请实施例中的S1建立请求响应2；其余相关描述可参考图14所示的实施例，在此不再赘述。
S1603、终端向E-UTRAN设备发送附着/TAU请求消息，以使得E-UTRAN设备接收来自终端的附着/TAU请求消息。
其中，若该终端首次接入4G网络，则附着/TAU请求消息的消息体中不包含原始(old)GUTI，消息头中也无分配old GUTI的old MME的GUMMEI；若终端之前已经从4G网络接入过，则附着/TAU请求消息的消息体中包含原来接入的4G网络中的old MME分配的4G-GUTI作为old GUTI，该4G-GUTI中包含了分配该4G-GUTI的old MME的GUMMEI，记作第一GUMMEI。另外，附着/TAU请求消息的消息头中包含了该第一GUMMEI。
此外，若该终端保存有有效的5G-GUTI，则该附着/TAU请求消息还携带该5G-GUTI。
S1604、E-UTRAN设备选择第一融合网络设备为该终端提供服务。
其中，E-UTRAN设备可以在该E-UTRAN设备连接的各融合网络设备中，按照无线邻区等因素，通过一定的算法选择允许其接入的MME pool，然后按照权重等因素，通过一定的算法在该MME pool中选择一个合适的融合网络设备为该终端提供服务，具体可参考现有的E-UTRAN设备选择MME为终端提供服务的方式，在此不再赘述。
S1605、E-UTRAN设备向第一融合网络设备发送附着/TAU请求消息，以使得第一融合网络设备接收来自E-UTRAN设备的附着/TAU请求消息。
其中，步骤S1605的相关实现可参考步骤S1405，在此不再赘述。
S1606、第一融合网络设备确定5G-GUTI不是第一融合网络设备分配的。
S1607、第一融合网络设备确定分配该5G-GUTI的AMF网元所属的AMF pool与第一融合网络设备作为5G网络中的AMF网元时所属的AMF pool相同，则第一融合网络设备确定终端 曾经通过E-UTRAN设备连接的第二融合网络设备接入5G网络。
可选的，本申请实施例中，若第一融合网络设备确定5G-GUTI是第一融合网络设备分配的；或者，若第一融合网络设备确定分配该5G-GUTI的AMF网元所属的AMF pool与第一融合网络设备作为5G网络中的AMF网元时所属的AMF pool不相同，则可以按照现有的终端在4G网络中的附着/TAU流程进行处理，本申请实施例对此不作具体限定。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将附着/TAU请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S1608a-S1609a：
S1608a、第一融合网络设备向E-UTRAN设备发送重路由请求消息，以使得E-UTRAN设备接收来自第一融合网络设备的重路由请求消息。
其中，该重路由请求消息包括由5G-GUTI中的GUAMI映射得到的在4G网络中的映射GUMMEI和上述附着/TAU请求消息。
可选的，本申请实施例中的重路由请求消息例如可以为重路由非接入层(non-access stratum，NAS)消息请求(reroute NAS message request)消息，本申请实施例对此不作具体限定。
S1609a、E-UTRAN设备根据重路由请求消息中的映射GUMMEI，向该映射GUMMEI对应的第二融合网络设备发送附着/TAU请求消息，以使得第二融合网络设备接收来自E-UTRAN设备的附着/TAU请求消息。
或者，方式二、包括如下步骤S1608b-S1610b：
S1608b、第一融合网络设备向域名系统(domain name system，DNS)服务器发送DNS查询请求(DNS query request)消息，以使得DNS服务器接收来自第一融合网络设备的DNS查询请求消息。该DNS查询请求消息携带由5G-GUTI中的GUAMI映射得到的在4G网络中的映射GUMMEI，用于查询第二融合网络设备的地址信息。
可选的，本申请实施例中，第一融合网络设备可以根据由5G-GUTI中的GUAMI映射得到的在4G网络中的映射GUMMEI构造MME全量域名(fully qualified domain name，FQDN)，并将MME FQDN携带在DNS查询请求消息中以查询第二融合网络设备的地址信息。其中，MMEFQDN的格式如下，包含了映射GUMMEI信息：
mmec<MMEC>.mmegi<MMEGI>.mme.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
S1609b、DNS服务器向第一融合网络设备发送DNS查询响应(DNS query response)消息，以使得第一融合网络设备接收来自DNS服务器的DNS查询响应消息。其中，该DNS查询响应消息携带第二融合网络设备的地址信息。
S1610b、第一融合网络设备根据第二融合网络设备的地址信息，向第二融合网络设备发送MME重路由NAS消息请求(MME reroute NAS message request)消息，以使得第二融合网络设备接收来自第一融合网络设备的MME重路由NAS消息请求消息。其中，该MME重路由NAS消息请求消息携带上述附着/TAU请求消息。
或者，方式三、包括如下步骤S1608c-S1610c：
S1608c、第一融合网络设备根据向网络发现功能(network repository function，NRF)网元发送发现请求(discovery request)消息，以使得NRF网元接收来自第一融合网络设备的发现请求消息。
其中，该发现请求消息携带5G-GUTI中的GUAMI，用于查询第二融合网络设备的地址信息。
S1609c、NRF网元向第一融合网络设备发送发现响应(discovery response)消息，以使得第一融合网络设备接收来自NRF网元的发现响应消息。其中，该发现响应消息携带第二融合网络设备的地址信息。
S1610c、第一融合网络设备根据第二融合网络设备的地址信息，向第二融合网络设备发送N1消息通知(N1 message notify)，以使得第二融合网络设备接收来自第一融合网络设备的N1消息通知。其中，该N1消息通知携带上述附着/TAU请求消息。
进一步的，在将附着/TAU请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤S1611-S1612：
S1611、第二融合网络设备向E-UTRAN设备发送附着/TAU接受消息，以使得E-UTRAN设备接收来自第二融合网络设备的附着/TAU接受消息。其中，该附着/TAU接受消息携带新分配的4G-GUTI，该新分配的4G-GUTI可以唯一关联到一个从4G网络接入的终端的上下文。
S1612、E-UTRAN设备向终端发送附着/TAU接受消息，以使得终端接收来自E-UTRAN设备的附着/TAU接受消息。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1601a至S1612中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图2所示的接入系统中的第一网络为5G网络，第二网络为4G网络，NG-AN设备对AMF网元的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图17所示，为本申请实施例提供的一种接入方法，该接入方法包括如下步骤：
S1701a-S1702a、与图15所示的实施例中的步骤S1501-S1502类似，区别比如在于将步骤S1501-S1502中的融合网络设备替换为本申请实施例中的第一融合网络设备；将步骤S1501-S1502中的NG建立请求消息替换为本申请实施例中的NG建立请求消息1；将步骤S1501-S1502中的NG建立响应消息替换为本申请实施例中的NG建立请求响应1；其余相关描述可参考图15所示的实施例，在此不再赘述。
S1701b-S1702b、与图15所示的实施例中的步骤S1501-S1502类似，区别比如在于将步骤S1501-S1502中的融合网络设备替换为本申请实施例中的第二融合网络设备；将步骤S1501-S1502中的NG建立请求消息替换为本申请实施例中的NG建立请求消息2；将步骤S1501-S1502中的NG建立响应消息替换为本申请实施例中的NG建立请求响应2；其余相关描述可参考图15所示的实施例，在此不再赘述。
S1703、终端向NG-AN设备发送注册请求消息，以使得NG-AN设备接收来自终端的注册请求消息。
其中，若该终端首次接入5G网络，则注册请求消息的消息体中不包含原始(old)GUTI，消息头中也无分配old GUTI的old AMF网元的GUAMI；若终端之前已经从5G网络接入过，则注册请求消息的消息体中包含原来接入的5G网络中的old AMF网元分配的5G-GUTI作为old GUTI，该5G-GUTI中包含了分配该5G-GUTI的old AMF网元的GUAMI，记作第一GUAMI。另外， 注册请求消息的消息头中包含了该第一GUAMI。
此外，若该终端保存有有效的4G-GUTI，则该注册请求消息还携带该4G-GUTI。
S1704、NG-AN设备选择第一融合网络设备为该终端提供服务。
其中，NG-AN设备可以在该NG-AN设备连接的各融合网络设备中，按照无线邻区等因素，通过一定的算法选择允许其接入的AMF pool，然后按照权重等因素，通过一定的算法在该AMF pool中选择一个合适的融合网络设备为该终端提供服务，具体可参考现有的NG-AN设备选择AMF网元为终端提供服务的方式，在此不再赘述。
S1705、NG-AN设备向第一融合网络设备发送注册请求消息，以使得第一融合网络设备接收来自NG-AN设备的注册请求消息。
其中，步骤S1705的相关实现可参考步骤S1505，在此不再赘述。
S1706、第一融合网络设备确定4G-GUTI不是第一融合网络设备分配的。
S1707、第一融合网络设备确定分配该4G-GUTI的MME所属的MME pool与第一融合网络设备作为4G网络中的MME时所属的MME pool相同，则第一融合网络设备确定终端曾经通过NG-AN设备连接的第二融合网络设备接入4G网络。
可选的，本申请实施例中，若第一融合网络设备确定注册请求消息中的4G-GUTI是第一融合网络设备分配的；或者，若第一融合网络设备确定分配该4G-GUTI的MME所属的MME pool与第一融合网络设备作为4G网络中的MME时所属的MME pool不相同，则可以按照现有的终端在5G网络中的注册流程进行处理，本申请实施例对此不作具体限定。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将注册请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S1708a-S1709a：
S1708a、第一融合网络设备向NG-AN设备发送重路由请求消息，以使得NG-AN设备接收来自第一融合网络设备的重路由请求消息。
其中，该重路由请求消息包括由4G-GUTI中的GUMMEI映射得到的在5G网络中的映射GUAMI和上述注册请求消息。
可选的，本申请实施例中的重路由请求消息例如可以为重路由非接入层NAS消息请求消息，本申请实施例对此不作具体限定。
S1709a、NG-AN设备根据重路由请求消息中的映射GUAMI，向该映射GUAMI对应的第二融合网络设备发送注册请求消息，以使得第二融合网络设备接收来自NG-AN设备的注册请求消息。
或者，方式二、包括如下步骤S1708b-S1710b：
S1708b、第一融合网络设备根据向NRF网元发送发现请求消息，以使得NRF网元接收来自第一融合网络设备的发现请求消息。
其中，该发现请求消息携带由4G-GUTI中的GUMMEI映射得到的在5G网络中的映射GUAMI，用于查询第二融合网络设备的地址信息。
S1709b、NRF网元向第一融合网络设备发送发现响应消息，以使得第一融合网络设备接收来自NRF网元的发现响应消息。其中，该发现响应消息携带第二融合网络设备的地址信息。
S1710b、第一融合网络设备根据第二融合网络设备的地址信息，向第二融合网络设备发送N1消息通知，以使得第二融合网络设备接收来自第一融合网络设备的N1消息通知。其中，该N1消息通知携带上述注册请求消息。
或者，方式三、包括如下步骤S1708c-S1710c：
S1708c、第一融合网络设备向DNS服务器发送DNS查询请求消息，以使得DNS服务器接收来自第一融合网络设备的DNS查询请求消息。该DNS查询请求消息携带4G-GUTI中的GUMMEI，用于查询第二融合网络设备的地址信息。
可选的，本申请实施例中，第一融合网络设备可以根据4G-GUTI中的GUMMEI构造MME FQDN，并将MME FQDN携带在DNS查询请求消息中以查询第二融合网络设备的地址信息。其中，MME FQDN的格式如下，包含了映射GUMMEI信息：
mmec<MMEC>.mmegi<MMEGI>.mme.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
S1709c、DNS服务器向第一融合网络设备发送DNS查询响应消息，以使得第一融合网络设备接收来自DNS服务器的DNS查询响应消息。其中，该DNS查询响应消息携带第二融合网络设备的地址信息。
S1710c、第一融合网络设备根据第二融合网络设备的地址信息，向第二融合网络设备发送MME重路由NAS消息请求消息，以使得第二融合网络设备接收来自第一融合网络设备的MME重路由NAS消息请求消息。其中，该MME重路由NAS消息请求消息携带上述注册请求消息。
进一步的，在将注册请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤S1711-S1712：
S1711、第二融合网络设备向NG-AN设备发送注册接受消息，以使得NG-AN设备接收来自第二融合网络设备的注册接受消息。其中，该注册接受消息携带新分配的5G-GUTI，该新分配的5G-GUTI可以唯一关联到一个从5G网络接入的终端的上下文。
S1712、NG-AN设备向终端发送注册接受消息，以使得终端接收来自NG-AN设备的注册接受消息。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1701a至S1712中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图2所示的接入系统中的第一网络为4G网络，第二网络为5G网络，E-UTRAN设备对MME的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图18所示，为本申请实施例提供的一种接入方法，该接入方法包括如下步骤：
S1801a-S1806、同图16所示的实施例中的步骤S1601a-S1606，相关描述可参考图16所示的实施例，在此不再赘述。
S1807、第一融合网络设备获取为终端分配5G-GUTI的目标AMF网元的地址信息，以及能够为E-UTRAN设备提供服务的候选MME的地址信息。
可选的，本申请实施例中，第一融合网络设备可以通过图16所示的实施例中第一融合网络设备获取第二融合网络设备的地址信息的方式来获取为终端分配5G-GUTI的目标AMF网元的地址信息，具体可参考图16所示的实施例，在此不再赘述。
可选的，本申请实施例中，第一融合网络设备可以根据E-UTRAN设备的标识或者E-UTRAN设备所服务的跟踪区的标识获取能够为E-UTRAN设备提供服务的候选MME的地址信息。
比如，第一融合网络设备可以根据E-UTRAN设备的标识或者E-UTRAN设备所服务的跟踪区的标识构造FQDN，进而向DNS服务器发送DNS查询请求消息，以使得DNS服务器接收来自第一融合网络设备的DNS查询请求消息。该DNS查询请求消息携带上述FQDN，用于请求查询候选MME的地址信息。DNS服务器向第一融合网络设备发送DNS查询响应消息，以使得第一融合网络设备接收来自DNS服务器的DNS查询响应消息，该DNS查询响应消息携带一组候选MME的标识列表和地址信息。
其中，第一融合网络设备可以通过如下几种方式构造FQDN：
方式一，融合网络设备可以根据E-UTRAN设备的标识构造FQDN6，FQDN6中包括E-UTRAN设备的标识，格式如下所示：
enb<eNodeB-ID>.enb.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
方式二，融合网络设备可以根据E-UTRAN设备所服务的跟踪区的标识构造FQDN7，FQDN7中包括E-UTRAN设备所服务的跟踪区的标识，格式如下所示：
tac-lb<TAC-low-byte>.tac-hb<TAC-high-byte>.tac.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
本申请实施例对DNS查询请求消息中的FQDN的构造方式不作具体限定。
S1808、第一融合网络设备确定目标AMF网元的地址信息在候选MME的地址信息中，则第一融合网络设备确定终端曾经通过E-UTRAN设备连接的第二融合网络设备接入5G网络。
此时，相应的，第一融合网络设备可以将目标AMF网元的地址信息确定为第二融合网络设备的地址信息。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将附着/TAU请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S1809a-S1810a：
S1809a-S1810a、同图16所示的实施例中的步骤S1608a-S1609a，相关描述可参考图16所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S1809b：
S1809b、同图16所示的实施例中的步骤S1610b，相关描述可参考图16所示的实施例，在此不再赘述。
或者，方式三、包括如下步骤S1809c：
S1809c、同图16所示的实施例中的步骤S1610c，相关描述可参考图16所示的实施例，在此不再赘述。
进一步的，在将附着/TAU请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤S1811-S1812：
S1811-S1812、同图16所示的实施例中的步骤S1611-S1612，相关描述可参考图16所示的实施例，在此不再赘述。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1801a至S1812中的第一融合网络设备的动作可以由图6所示的通信设 备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图2所示的接入系统中的第一网络为5G网络，第二网络为4G网络，NG-AN设备对AMF网元的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图19所示，为本申请实施例提供的一种接入方法，该接入方法包括如下步骤：
S1901a-S1906、同图17所示的实施例中的步骤S1701a-S1706，相关描述可参考图17所示的实施例，在此不再赘述。
S1907、第一融合网络设备获取为终端分配4G-GUTI的目标MME的地址信息，以及能够为NG-AN设备提供服务的候选AMF网元的地址信息。
可选的，本申请实施例中，第一融合网络设备可以通过图17所示的实施例中第一融合网络设备获取第二融合网络设备的地址信息的方式获取为终端分配4G-GUTI的目标MME的地址信息，具体可参考图17所示的实施例，在此不再赘述。
可选的，本申请实施例中，第一融合网络设备可以根据NG-AN设备的标识或者NG-AN设备所服务的跟踪区的标识获取能够为NG-AN设备提供服务的候选AMF网元的地址信息。
比如，第一融合网络设备可以根据NG-AN设备的标识或者NG-AN设备所服务的跟踪区的标识构造FQDN，进而向DNS服务器发送DNS查询请求消息，以使得DNS服务器接收来自第一融合网络设备的DNS查询请求消息。该DNS查询请求消息携带上述FQDN，用于请求查询候选AMF网元的地址信息。DNS服务器向第一融合网络设备发送DNS查询响应消息，以使得第一融合网络设备接收来自DNS服务器的DNS查询响应消息，该DNS查询响应消息携带一组候选AMF网元的标识列表和地址信息。
其中，第一融合网络设备可以通过如下几种方式构造FQDN：
方式一，第一融合网络设备可以根据NG-AN设备的标识构造FQDN1，FQDN1中包括NG-AN设备的标识，格式可以为5G网络中的NG-AN设备的标识对应的FQDN格式，如下所示：
rannode<AN设备ID>.rannode.5g.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-amf:x-n26"。
方式二，第一融合网络设备可以根据NG-AN设备所服务的跟踪区的标识构造FQDN2，FQDN2中包括NG-AN设备所服务的跟踪区的标识，格式可以为5G网络中的NG-AN设备所服务的跟踪区的标识对应的FQDN格式，如下所示：
tac-lb<TAC-low-byte>.tac-mb<TAC-middle-byte>.tac-hb<TAC-high-byte>.tac.5g.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-amf:x-n26"。
方式三，第一融合网络设备可以根据NG-AN设备的标识构造FQDN3，FQDN3中包括NG-AN设备的标识，格式可以为4G网络中的E-UTRAN设备的标识对应的FQDN格式，如下所示：
enb<eNodeB-ID>.enb.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
其中的“eNodeB-ID”使用全球AN设备ID中的AN设备ID进行填充。
方式四，第一融合网络设备可以根据NG-AN设备所服务的跟踪区的标识构造FQDN4，FQDN4中包括NG-AN设备所服务的跟踪区的标识，格式可以为4G网络中的E-UTRAN设备所服务的跟踪区的标识对应的FQDN格式，如下所示：
tac-lb<TAC-low-byte>.tac-hb<TAC-high-byte>.tac.epc.mnc<MNC>.mcc<MCC>.3gppnet work.org；
查询参数："x-3gpp-mme:x-s10"。
其中的“TAC-low-byte”使用5G-TAI的TAC字段的低1字节填充；其中的“TAC-high-byte”使用5G-TAI的TAC字段的高2字节填充。
方式五，第一融合网络设备可以根据NG-AN设备所服务的跟踪区的标识构造FQDN5，FQDN5中包括NG-AN设备所服务的跟踪区的标识中的MCC、MNC以及TAC中的低16位(即低2字节)，格式可以为4G网络中的E-UTRAN设备所服务的跟踪区的标识对应的FQDN格式，如下所示：
tac-lb<TAC-low-byte>.tac-hb<TAC-high-byte>.tac.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org；
查询参数："x-3gpp-mme:x-s10"。
其中的“TAC-low-byte”使用5G-TAI的TAC字段的最低字节填充；其中的“TAC-high-byte”使用5G-TAI的TAC字段的中间字节填充；5G-TAI的TAC字段的最高字节直接丢弃。
本申请实施例对DNS查询请求消息中的FQDN的构造方式不作具体限定。
或者，比如，第一融合网络设备可以向NRF网元发送发现请求消息，以使得NRF网元接收来自融合网络设备的发现请求消息。其中，该发现请求消息携带NG-AN设备的标识或者NG-AN设备所服务的跟踪区的标识，用于请求查询候选AMF网元的地址信息。NRF网元向融合网络设备发送发现响应消息，以使得融合网络设备接收来自NRF网元的发现响应消息，该发现响应消息携带一组候选AMF网元的地址信息。
S1908、第一融合网络设备确定目标MME的地址信息在候选AMF网元的地址信息中，则第一融合网络设备确定终端曾经通过NG-AN设备连接的第二融合网络设备接入4G网络。
此时，相应的，第一融合网络设备可以将目标MME的地址信息确定为第二融合网络设备的地址信息。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将附着/TAU请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S1909a-S1910a：
S1909a-S1910a、同图17所示的实施例中的步骤S1708a-S1709a，相关描述可参考图17所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S1909b：
S1909b、同图17所示的实施例中的步骤S1710b，相关描述可参考图17所示的实施例，在此不再赘述。
或者，方式三、包括如下步骤S1909c：
S1909c、同图17所示的实施例中的步骤S1710c，相关描述可参考图17所示的实施例，在此不再赘述。
进一步的，在将附着/TAU请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤S1911-S1912：
S1911-S1912、同图17所示的实施例中的步骤S1711-S1712，相关描述可参考图17所示的实施例，在此不再赘述。
基于本申请实施例提供的接入方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的重新接入。相关技术效果分析可参考接入系统部分的相关描述，在此不再赘述。
其中，上述步骤S1901a至S1912中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图3所示的切换系统中的第一网络为4G网络，第二网络为5G网络，源MME首次能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图20所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2001、终端向源E-UTRAN设备发送该终端的信息，以使得源E-UTRAN设备接收来自终端的该终端的信息。
其中，该终端的信息包括该终端在5G网络中的5G-GUTI。
S2002、源E-UTRAN设备向源MME发送切换需求(handover required)，以使得源MME接收来自源E-UTRAN设备的切换需求。
其中，该切换需求携带该终端在5G网络中的5G-GUTI，以及目标E-UTRAN设备的标识或者目标E-UTRAN设备所服务的跟踪区的标识。该目标E-UTRAN设备的标识或者目标E-UTRAN设备所服务的跟踪区的标识的相关描述可参考图8所示的实施例，在此不再赘述。
S2003、源MME根据目标E-UTRAN设备的标识或者该目标E-UTRAN设备所服务的跟踪区的标识，确定目标E-UTRAN设备不属于该源MME管辖。
其中，本申请实施例中，目标E-UTRAN设备是否属于该源MME管辖可以理解为目标E-UTRAN设备是否已经与该源MME建立连接，在此统一说明，以下不再赘述。
可选的，源MME可以将切换需求中携带的目标E-UTRAN设备的标识与之前自己连接的各E-UTRAN设备在E-UTRAN设备注册流程中上报的E-UTRAN设备的标识进行匹配，若匹配成功，比如，之前自己连接的各E-UTRAN设备在E-UTRAN设备注册流程中上报的E-UTRAN设备的标识中包括切换需求中携带的目标E-UTRAN设备的标识，则可以确定目标E-UTRAN设备属于该源MME管辖。
或者，可选的，源MME可以将切换需求中携带的目标E-UTRAN设备所服务的跟踪区的标识与之前自己连接的各E-UTRAN设备在E-UTRAN设备注册流程中上报的E-UTRAN设备所服务的跟踪区的标识进行匹配，若匹配成功，比如，之前自己连接的各E-UTRAN设备在E-UTRAN设备注册流程中上报的E-UTRAN设备所服务的跟踪区的标识中包括切换需求中携带的目标E-UTRAN设备所服务的跟踪区的标识，则可以确定目标E-UTRAN设备属于该源MME管辖。
否则，源MME可以确定目标E-UTRAN设备不属于该源MME管辖。
可选的，本申请实施例中，若源MME根据目标E-UTRAN设备的标识或者该目标E-UTRAN设备所服务的跟踪区的标识，确定目标E-UTRAN设备属于该源MME管辖，则可以参考现有的4G网络的切换流程进行处理，本申请实施例对此不作具体限定。
S2004、源MME根据目标E-UTRAN设备的标识或者该目标E-UTRAN设备所服务的跟踪区的标识，获取候选MME的标识列表和地址信息。
其中，步骤S2004的具体实现可参考图18所示的实施例中第一融合网络设备从DNS服务器获取候选MME的标识列表和地址信息的方式，在此不再赘述。
其中，本申请实施例中的候选MME的标识列表中可以包括MME的GUMMEI、或者融合网络设备作为MME时对应的原始GUMMEI和融合网络设备作为AMF网元时对应的映射GUMMEI等，本申请对此不作具体限定。
S2005、源MME根据上述5G-GUTI和候选MME的标识列表，确定目标融合网络设备。
可选的，本申请实施例中，源MME可以将候选MME的标识列表中，与由5G-GUTI中的GUAMI在4G网络中映射得到的映射GUMMEI相同的映射GUMMEI所对应的融合网络设备确定为目标融合网络设备。
S2006、源MME根据候选MME的地址信息中包括的目标融合网络设备的地址信息，向目标融合网络设备发送转发重定向请求(forward relocation request)消息，以使得目标融合网络设备接收来自源MME的转发重定向请求消息。
其中，该转发重定向请求消息携带终端的4G上下文，用于请求目标融合网络设备为终端准备相关的资源。
S2007、目标融合网络设备向目标E-UTRAN设备发送切换请求(handover request)，以使得目标E-UTRAN设备接收来自融合网络设备的切换请求。其中，该切换请求用于请求目标E-UTRAN设备为该终端准备相关的资源。
S2008、目标E-UTRAN设备向目标融合网络设备发送切换请求确认(handover request acknowledge)，以使得目标融合网络设备接收来自目标E-UTRAN设备的切换请求确认。
S2009、目标融合网络设备向源MME发送转发重定向响应(forward relocation response)消息，以使得源MME接收来自目标融合网络设备的转发重定向响应消息。
2010、源MME向源E-UTRAN设备发送切换命令(handover command)，以使得源E-UTRAN设备接收来自源MME的切换命令。其中，该切换命令用于指示将终端切换到目标E-UTRAN设备上。
S2011、源E-UTRAN设备向终端发送切换命令，以使得终端接收来自源E-UTRAN设备的切换命令。
S2012、终端切换到目标E-UTRAN设备上之后，向目标E-UTRAN设备发送切换确认(handover confirm)消息，以使得目标E-UTRAN设备接收来自终端的切换确认消息。
其中，该切换确认消息用于指示终端已经切换到目标E-UTRAN设备上。
S2013、目标E-UTRAN设备向目标融合网络设备发送切换通知(handover notify)，以使得目标融合网络设备接收来自目标E-UTRAN设备的切换通知。其中，该切换通知用于指示终端已经切换到目标E-UTRAN设备上。
S2014、目标融合网络设备向源MME发送转发重定向完成通知(forward relocation complete notification)，以使得源MME接收来自目标融合网络设备的转发重定向完成通知。其中，该转发重定向完成通知用于指示其可以释放终端相关的资源。
S2015、源MME向目标融合网络设备发送转发重定向完成确认(forward relocation complete acknowledge)，以使得目标融合网络设备接收来自源MME的转发重定向完成确认。
S2016、可选的，源MME向源E-UTRAN设备发送释放命令(release command)，以使得源E-UTRAN设备接收来自源MME的释放命令。其中，该释放命令用于指示释放终端相关的资源。
进而，源E-UTRAN设备可以根据该释放命令，释放终端相关的资源，本申请实施例对此不作具体限定。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2001至S2016中的源MME的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图3所示的切换系统中的第一网络为5G网络，第二网络为4G网络，源AMF网元首次能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图21所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2101、终端向源NG-AN设备发送该终端的信息，以使得源NG-AN设备接收来自终端的该终端的信息。
其中，该终端的信息包括该终端在4G网络中的4G-GUTI。
S2102、源NG-AN设备向源AMF网元发送切换需求，以使得源AMF网元接收来自源NG-AN设备的切换需求。
其中，该切换需求携带该终端在4G网络中的4G-GUTI，以及目标NG-AN设备的标识或者目标NG-AN设备所服务的跟踪区的标识。该目标NG-AN设备的标识或者目标NG-AN设备所服务的跟踪区的标识的相关描述可参考图10所示的实施例，在此不再赘述。
S2103、与图20中的步骤S2003类似，区别比如在于：将步骤S2003中的源MME替换为本申请实施例中的源AMF网元；将步骤S2003中的目标E-UTRAN设备替换为本申请实施例中的目标NG-AN设备，其余相关描述可参考图20所示的实施例，在此不再赘述。
S2104、源AMF网元根据目标NG-AN设备的标识或者该目标NG-AN设备所服务的跟踪区的标识，获取候选AMF网元的标识列表和地址信息。
其中，步骤S2104的具体实现可参考图19所示的实施例中第一融合网络设备从NRF网元获取候选AMF网元的标识列表和地址信息的方式，在此不再赘述。
其中，本申请实施例中的候选AMF网元的标识列表中可以包括AMF网元的GUAMI、或者融合网络设备作为AMF网元时对应的原始GUAMI和融合网络设备作为MME时对应的映射GUAMI等，本申请对此不作具体限定。
S2105、源AMF网元根据上述4G-GUTI和候选AMF网元的标识列表，确定目标融合网络设备。
可选的，本申请实施例中，源AMF网元可以将候选AMF网元的标识列表中，与由4G-GUTI中的GUMMEI在5G网络中映射得到的映射GUAMI相同的映射GUAMI所对应的融合网络设备确定为目标融合网络设备。
S2106、源AMF网元根据候选AMF网元的地址信息中包括的目标融合网络设备的地址信息，向目标融合网络设备发送创建上下文请求(create context request)消息，以使得目标融合网络设备接收来自源AMF网元的创建上下文请求消息。
其中，该创建上下文请求消息携带终端的5G上下文，用于请求目标融合网络设备为终端准备相关的资源。
S2107-S2108、与图20中的步骤S2007-S2008类似，区别比如在于：将步骤S2007-S2008中的目标E-UTRAN设备替换为本申请实施例中的目标NG-AN设备，其余相关描述可参考图20所示的实施例，在此不再赘述。
S2109、目标融合网络设备向源AMF网元发送创建上下文响应(create context response)消息，以使得源AMF网元接收来自目标融合网络设备的创建上下文响应消息。
S2110-S2113、与图20中的步骤S2010-S2013类似，区别比如在于：将步骤S2010-S2013中的目标E-UTRAN设备替换为本申请实施例中的目标NG-AN设备；将步骤S2010-S2013中的源E-UTRAN设备替换为本申请实施例中的源NG-AN设备；将步骤S2010-S2013中的源MME替换为本申请实施例中的源AMF网元，其余相关描述可参考图20所示的实施例，在此不再赘述。
S2114、目标融合网络设备向源AMF网元发送N2信息通知(N2 Info notify)消息，以使得源AMF网元接收来自目标融合网络设备的N2信息通知。其中，该N2信息通知用于指示其可以释放终端相关的资源。
S2115、源AMF网元向目标融合网络设备发送N2信息通知确认(N2 Info notify acknowledge)，以使得目标融合网络设备接收来自源AMF网元的N2信息通知确认。
S2116、可选的，源AMF网元向源NG-AN设备发送释放命令，以使得源NG-AN设备接收来自源AMF网元的释放命令。其中，该释放命令用于指示释放终端相关的资源。
进而，源NG-AN设备可以根据该释放命令，释放终端相关的资源，本申请实施例对此不作具体限定。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2101至S2116中的源MME的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图4所示的切换系统中的第一网络为4G网络，第二网络为5G网络，源MME对目标MME的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图22所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2201-S2204、同图20所示的实施例中的步骤S2001-S2004，相关描述可参考图20所示的实施例，在此不再赘述。
S2205、源MME根据候选MME的标识列表，选择第一融合网络设备为终端提供服务。
S2206、源MME根据第一融合网络设备的地址信息，向第一融合网络设备发送转发重定向请求消息，以使得目标融合网络设备接收来自源MME的转发重定向请求消息。
其中，该转发重定向请求消息携带上述5G-GUTI，以及源MME的地址信息。
S2207-S2208、同图16所示的实施例中的步骤S1606-S1607，相关描述可参考图16所示的实施例，在此不再赘述。
可选的，本申请实施例中，若第一融合网络设备确定5G-GUTI是第一融合网络设备分配的；或者，若第一融合网络设备确定分配该5G-GUTI的AMF网元所属的AMF pool与第一融合网络设备作为5G网络中的AMF网元时所属的AMF pool不相同，则可以按照现有的终端在4G网络中的切换流程进行处理，本申请实施例对此不作具体限定。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将转发重定向请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S2209a-S2211a：
S2209a-S2211a、与步骤S1608b-S1610b类似，区别比如在于：将步骤S1608b-S1610b中的MME重路由NAS消息请求消息携带附着/TAU请求消息替换为了本申请实施例中的MME重路由转发重定向请求(MME reroute forward relocation request)消息携带转发重定向请求消息，其余相关描述可参考图16所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S2209b-S2212b：
S2209b-S2210b、同上述步骤S2209a-S2210a，在此不再赘述。
S2211b、第一融合网络设备向源MME发送转发重定向响应消息，以使得源MME接收来自第一融合网络设备的转发重定向响应消息。
其中，该转发重定向响应消息携带指示信息和第二融合网络设备的地址信息，该指示信息用于指示源MME将转发重定向请求消息发送给第二融合网络设备。
S2212b、源MME根据第二融合网络设备的地址信息，向第二融合网络设备发送上述转发重定向请求消息，以使得第二融合网络设备接收来自源MME的转发重定向请求消息。
或者，方式三、包括如下步骤S2209c-S2211c：
S2209c-S2211c、与步骤S1608c-S1610c类似，区别比如在于：将步骤S1608c-S1610c中的N1消息通知携带附着/TAU请求消息替换为了本申请实施例中的转发重定向请求消息通知(forward relocation request message notify)携带转发重定向请求消息，其余相关描述可参考图16所示的实施例，在此不再赘述。
进一步的，在将转发重定向请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤：
S2213-S2222、与图20所示的实施例中的步骤S2007-S2016类似，区别比如在于：将步骤S2007-S2016中的目标融合网络设备替换为本申请实施例中的第二融合网络设备，其余相关描述可参考图20所示的实施例，在此不再赘述。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2201至S2222中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图4所示的切换系统中的第一网络为5G网络，第二网络为4G网络，源AMF网元对目标AMF网元的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图23所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2301-S2304、同图21所示的实施例中的步骤S2101-S2104，相关描述可参考图21所示的实施例，在此不再赘述。
S2305、源AMF网元根据候选AMF网元的标识列表，选择第一融合网络设备为终端提供服务。
S2306、源AMF网元根据第一融合网络设备的地址信息，向第一融合网络设备发送创建上下文请求消息，以使得目标融合网络设备接收来自源AMF网元的创建上下文请求消息。
其中，该创建上下文请求消息携带上述5G-GUTI，以及源AMF网元的地址信息。
S2307-S2308、与图17所示的实施例中的步骤S1706-S1707类似，区别比如在于将图7所示的实施例中的NG-AN设备替换为本申请实施例中的目标NG-AN设备，其余相关描述可参考图16所示的实施例，在此不再赘述。
可选的，本申请实施例中，若第一融合网络设备确定注册请求消息中的4G-GUTI是第一融合网络设备分配的；或者，若第一融合网络设备确定分配该4G-GUTI的MME所属的MME pool与第一融合网络设备作为4G网络中的MME时所属的MME pool不相同，则可以按照现有的终端在5G网络中的切换流程进行处理，本申请实施例对此不作具体限定。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将创建上下文请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S2309a-S2311a：
S2309a-S2311a、与步骤S1708b-S1710b类似，区别比如在于：将步骤S1708b-S1710b中的N1消息通知携带注册请求消息替换为了本申请实施例中的转发重定向请求消息通知携带创建上下文请求消息，其余相关描述可参考图16所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S2309b-S3212b：
S2309b-S2310b、同上述步骤S2309a-S2310a，在此不再赘述。
S2311b、第一融合网络设备向源AMF网元发送创建上下文响应消息，以使得源AMF网元接收来自第一融合网络设备的创建上下文响应消息。
其中，该创建上下文响应消息携带指示信息和第二融合网络设备的地址信息，该指示信息用于指示源AMF网元将创建上下文请求消息发送给第二融合网络设备。
S2312b、源AMF网元根据第二融合网络设备的地址信息，向第二融合网络设备发送上述创建上下文请求消息，以使得第二融合网络设备接收来自源AMF网元的创建上下文请求消息。
或者，方式三、包括如下步骤S2309c-S2311c：
S2309c-S2311c、与步骤S1708c-S1710c类似，区别比如在于：将步骤S1708c-S1710c中的MME重路由NAS消息请求携带注册请求消息替换为了本申请实施例中的MME重路由转发重定向请求消息携带创建上下文请求消息，其余相关描述可参考图17所示的实施例，在此不再赘述。
进一步的，在将创建上下文请求消息重定向到第二融合网络设备之后，本申请实施例提供的接入方法还包括如下步骤：
S2313-S2322、与图21所示的实施例中的步骤S2107-S2116类似，区别比如在于：将步骤S2107-S2116中的目标融合网络设备替换为本申请实施例中的第二融合网络设备，其余相关描述可参考图21所示的实施例，在此不再赘述。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2301至S2322中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图4所示的切换系统中的第一网络为4G网络，第二网络为5G网络，源MME对目标MME的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图24所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2401-S2407、同图22所示的实施例中的步骤S2201-S2207，相关描述可参考图22所示的实施例，在此不再赘述。
S2408、第一融合网络设备获取为终端分配5G-GUTI的目标AMF网元的地址信息，以及能够为目标E-UTRAN设备提供服务的候选MME的地址信息。
可选的，本申请实施例中，第一融合网络设备可以通过图22所示的实施例中第一融合网络设备获取第二融合网络设备的地址信息的方式获取为终端分配5G-GUTI的目标AMF网元的地址信息，具体可参考图22所示的实施例，在此不再赘述。
可选的，本申请实施例中，第一融合网络设备可以根据目标E-UTRAN设备的标识或者目标E-UTRAN设备所服务的跟踪区的标识获取能够为目标E-UTRAN设备提供服务的候选MME的 地址信息，相关描述可参考图18所示的实施例中的步骤S1807，在此不再赘述。或者，本申请实施例中，源MME在发送给第一融合网络设备的转发重定向请求消息中可以携带源MME获取的能够为目标E-UTRAN设备提供服务的候选MME的地址信息，以使得第一融合网络设备可以获取能够为目标E-UTRAN设备提供服务的候选MME的地址信息，本申请实施例对此不作具体限定。
S2409、第一融合网络设备确定目标AMF网元的地址信息在候选MME的地址信息中，则第一融合网络设备确定终端曾经通过目标E-UTRAN设备连接的第二融合网络设备接入5G网络。
此时，相应的，第一融合网络设备可以将目标AMF网元的地址信息确定为第二融合网络设备的地址信息。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将转发重定向请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S2410a：
S2410a、同图22所示的实施例中的步骤S2211a，相关描述可参考图22所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S2410b-S2411b：
S2410b-S2411b、同图22所示的实施例中的步骤S2211b-S2212b，相关描述可参考图22所示的实施例，在此不再赘述。
或者，方式三、包括如下步骤S2410c：
S2410c、同图22所示的实施例中的步骤S2211c，相关描述可参考图22所示的实施例，在此不再赘述。
进一步的，在将转发重定向请求消息重定向到第二融合网络设备之后，本申请实施例提供的切换方法还包括如下步骤S2412-S2421：
S2412-S2421、同步骤S2213-S2222，相关描述可参考图22所示的实施例，在此不再赘述。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2401至S2421中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
可选的，以图4所示的切换系统中的第一网络为5G网络，第二网络为4G网络，源AMF网元对目标AMF网元的选择算法未做改进，不能保证为双注册终端选择到正确的融合网络设备进行处理为例，如图25所示，为本申请实施例提供的一种切换方法，该切换方法包括如下步骤：
S2501-S2507、同图23所示的实施例中的步骤S2301-S2307，相关描述可参考图23所示的实施例，在此不再赘述。
S2508、第一融合网络设备获取为终端分配4G-GUTI的目标MME的地址信息，以及能够为目标NG-AN设备提供服务的候选AMF网元的地址信息。
可选的，本申请实施例中，第一融合网络设备可以通过图23所示的实施例中第一融合网络设备获取第二融合网络设备的地址信息的方式获取为终端分配4G-GUTI的目标MME的地址 信息，具体可参考图23所示的实施例，在此不再赘述。
可选的，本申请实施例中，第一融合网络设备可以根据目标NG-AN设备的标识或者目标NG-AN设备所服务的跟踪区的标识获取能够为目标NG-AN设备提供服务的候选AMF网元的地址信息，相关描述可参考图19所示的实施例中的步骤S1907，在此不再赘述。或者，本申请实施例中，源AMF网元在发送给第一融合网络设备的创建上下文请求消息中可以携带源AMF网元获取的能够为目标NG-AN设备提供服务的候选AMF网元的地址信息，以使得第一融合网络设备可以获取能够为目标NG-AN设备提供服务的候选AMF网元的地址信息，本申请实施例对此不作具体限定。
S2509、第一融合网络设备确定目标MME的地址信息在候选AMF网元的地址信息中，则第一融合网络设备确定终端曾经通过目标NG-AN设备连接的第二融合网络设备接入4G网络。
此时，相应的，第一融合网络设备可以将目标MME的地址信息确定为第二融合网络设备的地址信息。
进一步的，本申请实施例还可以通过如下方式一至方式三中的任一种方式将转发重定向请求消息重定向到第二融合网络设备。
方式一、包括如下步骤S2510a：
S2510a、同图23所示的实施例中的步骤S2311a，相关描述可参考图23所示的实施例，在此不再赘述。
或者，方式二、包括如下步骤S2510b-S2511b：
S2510b-S2511b、同图23所示的实施例中的步骤S2311b-S2312b，相关描述可参考图23所示的实施例，在此不再赘述。
或者，方式三、包括如下步骤S2510c：
S2510c、同图23所示的实施例中的步骤S2311c，相关描述可参考图23所示的实施例，在此不再赘述。
进一步的，在将创建上下文请求消息重定向到第二融合网络设备之后，本申请实施例提供的切换方法还包括如下步骤S2512-S2521：
S2512-S2521、同步骤S2313-S2322，相关描述可参考图23所示的实施例，在此不再赘述。
基于本申请实施例提供的切换方法，可以在简化网络部署的复杂度，降低网络运维的工作量的前提下，实现双注册终端的成功切换。相关技术效果分析可参考切换系统部分的相关描述，在此不再赘述。
其中，上述步骤S2501至S2521中的第一融合网络设备的动作可以由图6所示的通信设备600中的处理器601调用存储器603中存储的应用程序代码来执行，本申请实施例对此不作任何限制。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，上述接入设备、第一融合网络设备或者源移动管理网元为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对接入设备、第一融合网络设备或者源移动管理网元进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
比如，以采用集成的方式划分各个功能模块的情况下，图26示出了一种接入设备260的结构示意图。该接入设备260为第一网络中的接入设备，该接入设备260包括：收发模块2602和处理模块2601。收发模块2602，用于接收来自终端的接入请求，接入请求携带第一移动管理标识和第三移动管理标识，其中，第一移动管理标识为第一网络中的第一移动管理网元的标识，第三移动管理标识为由终端在第二网络中的GUTI中的移动管理标识映射得到的在第一网络中的映射移动管理标识，其中，第一网络和第二网络为不同类型的网络。处理模块2601，用于在根据第一移动管理标识，确定第一移动管理网元和接入设备260之间无连接的情况下，根据第三移动管理标识，确定目标融合网络设备，其中，目标融合网络设备作为第二网络中的移动管理网元时对应的在第一网络中的映射移动管理标识为第三移动管理标识，目标融合网络设备用于终端接入第一网络。
可选的，收发模块2602，还用于向目标融合网络设备发送建立请求，建立请求用于请求注册到目标融合网络设备；收发模块2602，还用于来自目标融合网络设备的建立响应，建立响应携带第二移动管理标识和第三移动管理标识，其中，第二移动管理标识为目标融合网络设备作为第一网络中的第二移动管理网元时对应的原始移动管理标识。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该接入设备260以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该接入设备260可以采用图6所示的形式。
比如，图6中的处理器601可以通过调用存储器603中存储的计算机执行指令，使得接入设备260执行上述方法实施例中的接入方法。
具体的，图26中的收发模块2602和处理模块2601的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现。或者，图26中的处理模块2601的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现，图26中的收发模块2602的功能/实现过程可以通过图6中的通信接口604来实现。
由于本实施例提供的接入设备260可执行上述的接入方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持接入设备实现上述接入方法，例如在根据第一移动管理标识，确定第一移动管理网元和接入设备之间无连接的情况下，根据第三移动管理标识，确定目标融合网络设备。在一种可能的设计中，该装置还包括存储器。该存储器，用于保存接入设备必要的程序指令和数据。当然，存储器也可以不在该装置中。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
比如，以采用集成的方式划分各个功能模块的情况下，图27示出了一种第一融合网络设 备270的结构示意图。该第一融合网络设备270包括：收发模块2702和处理模块2701。收发模块2702，用于接收来自第一网络中的接入设备的接入请求，接入请求携带终端在第二网络中的GUTI，其中，第一网络和第二网络为不同类型的网络。处理模块2701，用于根据GUTI，确定终端曾经通过接入设备连接的第二融合网络设备接入第二网络。收发模块2702，还用于向第二融合网络设备发送接入请求，接入请求用于终端通过第二融合网络设备接入第一网络。
可选的，处理模块2701具体用于：确定GUTI不是第一融合网络设备270分配的GUTI；确定分配GUTI的移动管理网元所属的移动管理资源池与第一融合网络设备270作为第二网络中的移动管理网元时所属的移动管理资源池相同，则确定终端曾经通过接入设备连接的第二融合网络设备接入第二网络。
或者，可选的，处理模块2701具体用于：确定GUTI不是第一融合网络设备270分配的GUTI；获取为终端分配GUTI的目标移动管理网元的地址信息，以及能够为第一网络中的接入设备提供服务的候选移动管理网元的地址信息；在目标移动管理网元的信息在候选移动管理网元的地址信息中的情况下，确定终端曾经通过接入设备连接的第二融合网络设备接入第二网络。
可选的，收发模块2702用于向第二融合网络设备发送接入请求，具体为：用于向接入设备发送重路由请求消息，重路由请求消息携带接入请求和由GUTI中的第一移动管理标识映射得到的在第一网络中的映射移动管理标识，其中，映射移动管理标识用于接入设备向第二融合网络设备发送接入请求。
可选的，处理模块2701，还用于根据GUTI，获取第二融合网络设备的地址信息。相应的，收发模块2702用于向第二融合网络设备发送接入请求，具体为：用于根据第二融合网络设备的地址信息，向第二融合网络设备发送接入请求。
可选的，处理模块2701用于根据GUTI，获取第二融合网络设备的地址信息，具体为：用于发送第一请求消息，第一请求消息携带由GUTI中的第一移动管理标识映射得到的在第一网络中的映射移动管理标识，用于查询第二融合网络设备的地址信息；第一响应消息，第一响应消息携带第二融合网络设备的地址信息。
一种可能的实现方式中，第一网络为4G网络，第二网络为5G网络；相应的，收发模块2702用于发送第一请求消息，具体为：用于向DNS服务器发送第一请求消息；相应的，收发模块2702用于接收第一响应消息，具体为：用于接收来自DNS服务器的第一响应消息。
另一种可能的实现方式中，第一网络为5G网络，第二网络为4G网络；相应的，收发模块2702用于发送第一请求消息，具体为：用于向网络存储功能网元发送第一请求消息；相应的，收发模块2702用于接收第一响应消息，具体为：用于接收来自网络存储功能网元的第一响应消息。
可选的，处理模块2701用于根据GUTI，获取第二融合网络设备的地址信息，具体为：用于发送第二请求消息，第二请求消息携带GUTI中的第一移动管理标识，用于查询第二融合网络设备的地址信息；接收第二响应消息，第二响应消息携带第二融合网络设备的地址信息。
一种可能的实现方式中，第一网络为4G网络，第二网络为5G网络；相应的，收发模块2702用于发送第二请求消息，具体为：用于向网络存储功能网元发送第二请求消息。相应的，收发模块2702用于接收第二响应消息，具体为：用于接收来自网络存储功能网元的第二响应消息。
另一种可能的实现方式中，第一网络为5G网络，第二网络为4G网络；相应的，收发模 块2702用于发送第二请求消息，具体为：用于向DNS服务器发送第二请求消息；相应的，收发模块2702用于接收第二响应消息，具体为：用于接收来自DNS服务器的第二响应消息。
可选的，处理模块2701，还用于将目标移动管理网元的地址信息确定为第二融合网络设备的地址信息；相应的，收发模块2702，用于向第二融合网络设备发送接入请求，具体为：用于根据第二融合网络设备的地址信息，向第二融合网络设备发送接入请求。
可选的，处理模块2701用于获取为终端分配GUTI的目标移动管理网元的地址信息，具体为：用于发送第一请求消息，第一请求消息携带由GUTI中的第一移动管理标识映射得到的在第一网络中的映射移动管理标识，用于查询目标移动管理网元的地址信息；接收第一响应消息，第一响应消息携带目标移动管理网元的地址信息。
一种可能的实现方式中，第一网络为4G网络，第二网络为5G网络；相应的，收发模块2702用于发送第一请求消息，具体为：用于向DNS服务器发送第一请求消息；相应的，收发模块2702用于接收第一响应消息，具体为：用于接收来自DNS服务器的第一响应消息。
另一种可能的实现方式中，第一网络为5G网络，第二网络为4G网络；相应的，收发模块2702用于发送第一请求消息，具体为：用于向网络存储功能网元发送第一请求消息；相应的，收发模块2702用于接收第一响应消息，具体为：用于接收来自网络存储功能网元的第一响应消息。
可选的，处理模块2701用于获取为终端分配GUTI的目标移动管理网元的地址信息，具体为：用于发送第二请求消息，第二请求消息携带GUTI中的第一移动管理标识，用于查询为终端分配GUTI的目标移动管理网元的地址信息；接收第二响应消息，第二响应消息携带目标移动管理网元的地址信息。
一种可能的实现方式中，第一网络为4G网络，第二网络为5G网络；相应的，收发模块2702用于发送第二请求消息，具体为：用于向网络存储功能网元发送第二请求消息；相应的，收发模块2702用于接收第二响应消息，具体为：用于接收来自网络存储功能网元的第二响应消息。
另一种可能的实现方式中，第一网络为5G网络，第二网络为4G网络；相应的，收发模块2702用于发送第二请求消息，具体为：用于向DNS服务器发送第二请求消息；相应的，第一融合网络设备270接收第二响应消息，具体为：接收来自DNS服务器的第二响应消息。
可选的，处理模块2701用于获取能够为第一网络中的接入设备提供服务的候选移动管理网元的地址信息，具体为：用于接收来自源移动管理网元的能够为第一网络中的接入设备提供服务的候选移动管理网元的地址信息。
或者，可选的，处理模块2701用于获取能够为第一网络中的接入设备提供服务的候选移动管理网元的地址信息，具体为：
用于接收来自源移动管理网元的接入设备的标识、或者接入设备所服务的跟踪区的标识；根据接入设备的标识、或者接入设备所服务的跟踪区的标识，获取能够为第一网络中的接入设备提供服务的候选移动管理网元的地址信息。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该第一融合网络设备270以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领 域的技术人员可以想到该第一融合网络设备270可以采用图6所示的形式。
比如，图6中的处理器601可以通过调用存储器603中存储的计算机执行指令，使得第一融合网络设备270执行上述方法实施例中的接入方法。
具体的，图27中的收发模块2702和处理模块2701的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现。或者，图27中的处理模块2701的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现，图27中的收发模块2702的功能/实现过程可以通过图6中的通信接口604来实现。
由于本实施例提供的第一融合网络设备270可执行上述的接入方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持第一融合网络设备实现上述接入方法，例如根据GUTI，确定终端曾经通过接入设备连接的第二融合网络设备接入第二网络。在一种可能的设计中，该装置还包括存储器。该存储器，用于保存第一融合网络设备必要的程序指令和数据。当然，存储器也可以不在该装置中。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
比如，以采用集成的方式划分各个功能模块的情况下，图28示出了一种源移动管理网元280的结构示意图。该源移动管理网元280为第一网络中的源移动管理网元，该源移动管理网元280包括：收发模块2802和处理模块2801。收发模块2802，用于接收来自第一网络中的第一接入设备的切换需求，切换需求携带第一网络的第二接入设备的标识或者第二接入设备所服务的跟踪区的标识，以及，终端在第二网络中的GUTI，其中，第一网络和第二网络为不同类型的网络。处理模块2801，用于根据第二接入设备的标识或者跟踪区的标识，获取候选移动管理网元的标识列表和地址信息。处理模块2801，还用于根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备，其中，目标融合网络设备为候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备。收发模块2802，还用于根据候选移动管理网元的地址信息中包括的目标融合网络设备的地址信息，向目标融合网络设备发送请求消息，请求消息用于将终端切换到目标融合网络设备。
可选的，处理模块2801用于根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备，具体为：用于确定GUTI中的第一移动管理标识在第一网络中的映射移动管理标识；将候选移动管理网元的标识列表中，与映射移动管理标识相同的标识所对应的融合网络设备确定为目标融合网络设备。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该源移动管理网元280以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该源移动管理网元280可以采用图6所示的形式。
比如，图6中的处理器601可以通过调用存储器603中存储的计算机执行指令，使得源移动管理网元280执行上述方法实施例中的切换方法。
具体的，图28中的收发模块2802和处理模块2801的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现。或者，图28中的处理模块2801 的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现，图28中的收发模块2802的功能/实现过程可以通过图6中的通信接口604来实现。
由于本实施例提供的源移动管理网元280可执行上述的切换方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持源移动管理网元实现上述切换方法，例如根据GUTI和候选移动管理网元的标识列表，确定目标融合网络设备。在一种可能的设计中，该装置还包括存储器。该存储器，用于保存源移动管理网元必要的程序指令和数据。当然，存储器也可以不在该装置中。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
比如，以采用集成的方式划分各个功能模块的情况下，图29示出了一种第一融合网络设备290，其特征在于，第一融合网络设备290包括：收发模块2902和处理模块2901。收发模块2902，用于接收来自第一网络中的源移动管理网元的源移动管理网元的地址信息、以及终端在第二网络中的GUTI，其中，第一网络和第二网络为不同类型的网络。处理模块2901，用于根据GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络。收发模块2902，还用于根据第二融合网络设备的地址信息，向第二融合网络设备发送GUTI和源移动管理网元的地址信息，其中，GUTI和源移动管理网元的地址信息用于将终端切换到第二融合网络设备。
可选的，收发模块2902用于根据第二融合网络设备的地址信息，向第二融合网络设备发送GUTI和源移动管理网元的地址信息，具体为：用于向源移动管理网元发送第二融合网络设备的地址信息和指示信息，指示信息用于指示源移动管理网元根据第二融合网络设备的地址信息，向第二融合网络设备发送GUTI和源移动管理网元的地址信息。
可选的，处理模块2901用于根据GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络，具体为：用于确定GUTI不是第一融合网络设备290分配的GUTI；确定分配GUTI的移动管理网元所属的移动管理资源池与第一融合网络设备290作为第二网络中的移动管理网元时所属的移动管理资源池相同，则确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络。
可选的，处理模块2901，还用于根据GUTI，获取第二融合网络设备的地址信息。
可选的，处理模块2901用于根据GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络，具体为：用于确定GUTI不是第一融合网络设备290分配的GUTI；获取为终端分配GUTI的目标移动管理网元的地址信息，以及能够为第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息；在目标移动管理网元的信息在候选移动管理网元的地址信息中的情况下，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络。相应的，处理模块2901，还用于将目标移动管理网元的地址信息确定为第二融合网络设备的地址信息。
可选的，处理模块2901用于获取能够为第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息，具体为：用于接收来自源移动管理网元的能够为第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息。
或者，可选的，处理模块2901用于获取能够为第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息，具体为：用于接收来自源移动管理网元的目标接入设备的标识、 或者目标接入设备所服务的跟踪区的标识；根据目标接入设备的标识、或者目标接入设备所服务的跟踪区的标识，获取能够为第一网络中的目标接入设备提供服务的候选移动管理网元的地址信息。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该第一融合网络设备290以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该第一融合网络设备290可以采用图6所示的形式。
比如，图6中的处理器601可以通过调用存储器603中存储的计算机执行指令，使得第一融合网络设备290执行上述方法实施例中的切换方法。
具体的，图29中的收发模块2902和处理模块2901的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现。或者，图29中的处理模块2901的功能/实现过程可以通过图6中的处理器601调用存储器603中存储的计算机执行指令来实现，图29中的收发模块2902的功能/实现过程可以通过图6中的通信接口604来实现。
由于本实施例提供的第一融合网络设备290可执行上述的切换方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了一种装置(例如，该装置可以是芯片系统)，该装置包括处理器，用于支持第一融合网络设备实现上述切换方法，例如根据GUTI，确定终端曾经通过能够为第一网络中的目标接入设备提供服务的第二融合网络设备接入第二网络。在一种可能的设计中，该装置还包括存储器。该存储器，用于保存第一融合网络设备必要的程序指令和数据。当然，存储器也可以不在该装置中。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能 组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (34)

  1. 一种接入方法，其特征在于，所述接入方法包括：
    第一网络中的接入设备接收来自终端的接入请求，所述接入请求携带第一移动管理标识和第三移动管理标识，其中，所述第一移动管理标识为所述第一网络中的第一移动管理网元的标识，所述第三移动管理标识为由所述终端在所述第二网络中的全球唯一的临时标识GUTI中的移动管理标识映射得到的在所述第一网络中的映射移动管理标识，其中，所述第一网络和所述第二网络为不同类型的网络；
    在所述接入设备根据所述第一移动管理标识，确定所述第一移动管理网元和所述接入设备之间无连接的情况下，所述接入设备根据所述第三移动管理标识，确定目标融合网络设备，其中，所述目标融合网络设备作为所述第二网络中的移动管理网元时对应的在所述第一网络中的映射移动管理标识为所述第三移动管理标识，所述目标融合网络设备用于所述终端接入所述第一网络。
  2. 根据权利要求1所述的接入方法，其特征在于，在所述第一网络中的接入设备接收来自终端的接入请求之前，所述接入方法还包括：
    所述接入设备向所述目标融合网络设备发送建立请求，所述建立请求用于请求注册到所述目标融合网络设备；
    所述接入设备接收来自所述目标融合网络设备的建立响应，所述建立响应携带第二移动管理标识和所述第三移动管理标识，其中，所述第二移动管理标识为所述目标融合网络设备作为所述第一网络中的第二移动管理网元时对应的原始移动管理标识。
  3. 根据权利要求1或2所述的接入方法，其特征在于，所述第一网络为第四代4G网络，所述第二网络为第五代5G网络；相应的，所述第一移动管理标识为第一全球唯一的移动性管理实体标识GUMMEI，所述第三移动管理标识为第三GUMMEI。
  4. 根据权利要求1或2所述的接入方法，其特征在于，所述第一网络为5G网络，所述第二网络为4G网络；相应的，所述第一移动管理标识为第一全球唯一的接入和移动管理功能标识GUAMI，所述第三移动管理标识为第三GUAMI。
  5. 一种切换方法，其特征在于，所述切换方法包括：
    第一网络中的源移动管理网元接收来自所述第一网络中的第一接入设备的切换需求，所述切换需求携带所述第一网络的第二接入设备的标识或者所述第二接入设备所服务的跟踪区的标识，以及，所述终端在第二网络中的全球唯一的临时标识GUTI，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述源移动管理网元根据所述第二接入设备的标识或者所述跟踪区的标识，获取候选移动管理网元的标识列表和地址信息；
    所述源移动管理网元根据所述GUTI和所述候选移动管理网元的标识列表，确定目标融合网络设备，其中，所述目标融合网络设备为所述候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；
    所述源移动管理网元根据所述候选移动管理网元的地址信息中包括的所述目标融合网络设备的地址信息，向所述目标融合网络设备发送请求消息，所述请求消息用于将所述终端切换到所述目标融合网络设备。
  6. 根据权利要求5所述的切换方法，其特征在于，所述源移动管理网元根据所述GUTI 和所述候选移动管理网元的标识列表，确定目标融合网络设备，具体为：
    所述源移动管理网元确定所述GUTI中的第一移动管理标识在所述第一网络中的映射移动管理标识；
    所述源移动管理网元将所述候选移动管理网元的标识列表中，与所述映射移动管理标识相同的标识所对应的融合网络设备确定为所述目标融合网络设备。
  7. 根据权利要求6所述的切换方法，其特征在于，所述第一网络为第四代4G网络，所述第二网络为第五代5G网络；相应的，所述第一移动管理标识为全球唯一的接入和移动管理功能标识GUAMI，所述映射移动管理标识为全球唯一的移动性管理实体标识GUMMEI。
  8. 根据权利要求6所述的切换方法，其特征在于，所述第一网络为5G网络，所述第二网络为4G网络；相应的，所述第一移动管理标识为GUMMEI，所述映射移动管理标识为GUAMI。
  9. 一种接入设备，所述接入设备为第一网络中的接入设备，其特征在于，所述接入设备包括：收发模块和处理模块；
    所述收发模块，用于接收来自终端的接入请求，所述接入请求携带第一移动管理标识和第三移动管理标识，其中，所述第一移动管理标识为所述第一网络中的第一移动管理网元的标识，所述第三移动管理标识为由所述终端在所述第二网络中的全球唯一的临时标识GUTI中的移动管理标识映射得到的在所述第一网络中的映射移动管理标识，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述处理模块，用于在根据所述第一移动管理标识，确定所述第一移动管理网元和所述接入设备之间无连接的情况下，根据所述第三移动管理标识，确定目标融合网络设备，其中，所述目标融合网络设备作为所述第二网络中的移动管理网元时对应的在所述第一网络中的映射移动管理标识为所述第三移动管理标识，所述目标融合网络设备用于所述终端接入所述第一网络。
  10. 根据权利要求9所述的接入设备，其特征在于，
    所述收发模块，还用于向所述目标融合网络设备发送建立请求，所述建立请求用于请求注册到所述目标融合网络设备；
    所述收发模块，还用于来自所述目标融合网络设备的建立响应，所述建立响应携带第二移动管理标识和所述第三移动管理标识，其中，所述第二移动管理标识为所述目标融合网络设备作为所述第一网络中的第二移动管理网元时对应的原始移动管理标识。
  11. 一种源移动管理网元，所述源移动管理网元为第一网络中的源移动管理网元，其特征在于，所述源移动管理网元包括：收发模块和处理模块；
    所述收发模块，用于接收来自所述第一网络中的第一接入设备的切换需求，所述切换需求携带所述第一网络的第二接入设备的标识或者所述第二接入设备所服务的跟踪区的标识，以及，所述终端在第二网络中的全球唯一的临时标识GUTI，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述处理模块，用于根据所述第二接入设备的标识或者所述跟踪区的标识，获取候选移动管理网元的标识列表和地址信息；
    所述处理模块，还用于根据所述GUTI和所述候选移动管理网元的标识列表，确定目标融合网络设备，其中，所述目标融合网络设备为所述候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；
    所述收发模块，还用于根据所述候选移动管理网元的地址信息中包括的所述目标融合网 络设备的地址信息，向所述目标融合网络设备发送请求消息，所述请求消息用于将所述终端切换到所述目标融合网络设备。
  12. 根据权利要求11所述的源移动管理网元，其特征在于，所述处理模块用于根据所述GUTI和所述候选移动管理网元的标识列表，确定目标融合网络设备，具体为：
    用于确定所述GUTI中的第一移动管理标识在所述第一网络中的映射移动管理标识；将所述候选移动管理网元的标识列表中，与所述映射移动管理标识相同的标识所对应的融合网络设备确定为所述目标融合网络设备。
  13. 一种接入系统，其特征在于，所述接入系统包括融合网络设备和第一网络中的接入设备；
    其中，所述接入设备，用于接收来自终端的接入请求，所述接入请求携带第一移动管理标识和第三移动管理标识，其中，所述第一移动管理标识为所述第一网络中的第一移动管理网元的标识，所述第三移动管理标识为由所述终端在所述第二网络中的全球唯一的临时标识GUTI中的移动管理标识映射得到的在所述第一网络中的映射移动管理标识，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述接入设备，还用于在根据所述第一移动管理标识，确定所述第一移动管理网元和所述接入设备之间无连接的情况下，根据所述第三移动管理标识，确定目标融合网络设备，并向所述目标融合网络设备发送所述接入请求，其中，所述目标融合网络设备作为所述第二网络中的移动管理网元时对应的在所述第一网络中的映射移动管理标识为所述第三移动管理标识；
    所述目标融合网络设备，用于接收来自所述接入设备的所述接入请求，所述接入请求用于所述终端通过所述目标融合网络设备接入所述第一网络。
  14. 一种切换系统，其特征在于，所述切换系统包括：第一网络中的第一接入设备、所述第一网络中的源移动管理网元、以及目标融合网络设备；
    所述第一接入设备，用于向所述源移动管理网元发送切换需求，所述切换需求携带所述第一网络的第二接入设备的标识或者所述第二接入设备所服务的跟踪区的标识，以及，所述终端在第二网络中的全球唯一的临时标识GUTI，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述源移动管理网元，用于接收来自所述第一接入设备的所述切换需求，并根据所述第二接入设备的标识或者所述跟踪区的标识，获取候选移动管理网元的标识列表和地址信息；
    所述源移动管理网元，还用于根据所述GUTI和所述候选移动管理网元的标识列表，确定目标融合网络设备，其中，所述目标融合网络设备为所述候选移动管理网元的标识列表中的其中一个标识对应的融合网络设备；
    所述源移动管理网元，还用于根据所述候选移动管理网元的地址信息中包括的所述目标融合网络设备的地址信息，向所述目标融合网络设备发送请求消息；
    所述目标融合网络设备，还用于接收来自所述源移动管理网元的所述请求消息，所述请求消息用于将所述终端切换到所述目标融合网络设备。
  15. 一种接入方法，其特征在于，包括：
    第一融合网络设备接收来自第一网络中的接入设备的接入请求，所述接入请求携带终端在第二网络中的全球唯一的临时标识GUTI，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述第一融合网络设备根据所述GUTI，确定所述终端曾经通过该接入设备连接的第二融合网络设备接入所述第二网络；
    所述第一融合网络设备向所述第二融合网络设备发送所述接入请求，所述接入请求用于所述终端通过所述第二融合网络设备接入所述第一网络。
  16. 根据权利要求15所述的接入方法，其特征在于，所述第一融合网络设备根据所述GUTI，确定所述终端曾经通过所述接入设备连接的第二融合网络设备接入所述第二网络，具体包括：
    所述第一融合网络设备确定所述GUTI不是所述第一融合网络设备分配的GUTI；
    所述第一融合网络设备确定分配所述GUTI的移动管理网元所属的移动管理资源池与所述第一融合网络设备作为所述第二网络中的移动管理网元时所属的移动管理资源池相同，则所述第一融合网络设备确定所述终端曾经通过所述接入设备连接的第二融合网络设备接入所述第二网络。
  17. 根据权利要求15所述的接入方法，其特征在于，所述第一融合网络设备根据所述GUTI，确定所述终端曾经通过所述接入设备连接的第二融合网络设备接入所述第二网络，具体包括：
    所述第一融合网络设备确定所述GUTI不是所述第一融合网络设备分配的GUTI；
    所述第一融合网络设备获取为所述终端分配所述GUTI的目标移动管理网元的地址信息，以及能够为所述第一网络中的接入设备提供服务的候选移动管理网元的地址信息；
    在所述目标移动管理网元的信息在所述候选移动管理网元的地址信息中的情况下，所述第一融合网络设备确定所述终端曾经通过所述接入设备连接的第二融合网络设备接入所述第二网络。
  18. 根据权利要求15-17任一所述的接入方法，其特征在于，所述第一融合网络设备向所述第二融合网络设备发送所述接入请求，具体包括：
    所述第一融合网络设备向所述接入设备发送重路由请求消息，所述重路由请求消息携带所述接入请求和由所述GUTI中的第一移动管理标识映射得到的在所述第一网络中的映射移动管理标识，其中，所述映射移动管理标识用于所述接入设备向所述第二融合网络设备发送所述接入请求。
  19. 一种切换方法，其特征在于，包括：
    第一融合网络设备接收来自第一网络中的源移动管理网元的该源移动管理网元的地址信息、以及终端在第二网络中的全球唯一的临时标识GUTI，其中，所述第一网络和所述第二网络为不同类型的网络；
    所述第一融合网络设备根据所述GUTI，确定所述终端曾经通过能够为所述第一网络中的目标接入设备提供服务的第二融合网络设备接入所述第二网络；
    所述第一融合网络设备根据所述第二融合网络设备的地址信息，向所述第二融合网络设备发送所述GUTI和所述源移动管理网元的地址信息，其中，所述GUTI和所述源移动管理网元的地址信息用于将所述终端切换到所述第二融合网络设备。
  20. 根据权利要求19所述的切换方法，其特征在于，所述第一融合网络设备根据所述第二融合网络设备的地址信息，向所述第二融合网络设备发送所述GUTI和所述源移动管理网元的地址信息，具体包括：
    所述第一融合网络设备向所述源移动管理网元发送所述第二融合网络设备的地址信息和 指示信息，所述指示信息用于指示所述源移动管理网元根据所述第二融合网络设备的地址信息，向所述第二融合网络设备发送所述GUTI和所述源移动管理网元的地址信息。
  21. 根据权利要求19或20所述的切换方法，其特征在于，所述第一融合网络设备根据该GUTI，确定所述终端曾经通过能够为所述第一网络中的目标接入设备提供服务的第二融合网络设备接入所述第二网络，具体包括：
    所述第一融合网络设备确定所述GUTI不是所述第一融合网络设备分配的GUTI；
    所述第一融合网络设备确定分配所述GUTI的移动管理网元所属的移动管理资源池与所述第一融合网络设备作为所述第二网络中的移动管理网元时所属的移动管理资源池相同，则所述第一融合网络设备确定所述终端曾经通过能够为所述第一网络中的目标接入设备提供服务的第二融合网络设备接入所述第二网络。
  22. 一种第一网络中的接入设备，其特征在于，包括：处理器和通信接口，
    所述通信接口，用于接收代码指令并传输至所述处理器；
    所述处理器用于运行所述代码指令以执行如权利要求1-4任一项，或权利要求15-18任一项所述的接入方法。
  23. 一种第一网络中的源移动管理网元，其特征在于，包括：处理器和通信接口，
    所述通信接口，用于接收代码指令并传输至所述处理器；
    所述处理器用于运行所述代码指令以执行如权利要求5-8任一项，或权利要求19-21任一项所述的切换方法。
  24. 一种处理装置，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，以执行如权利要求1-4任一项，或权利要求15-18任一项所述的接入方法。
  25. 一种处理器，其特征在于，用于执行如权利要求1-4任一项，或权利要求15-18任一项所述的接入方法。
  26. 一种处理器，其特征在于，用于执行如权利要求5-8任一项，或权利要求19-21任一项所述的切换方法。
  27. 一种芯片系统，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，使得安装有所述芯片系统的设备执行如权利要求1-4任一项，或权利要求15-18任一项所述的接入方法。
  28. 一种芯片系统，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，使得安装有所述芯片系统的设备执行如权利要求5-8任一项，或权利要求19-21任一项所述的切换方法。
  29. 一种计算机可读存储介质，包括计算机程序，当其在计算机上运行时，使得所述计算机执行如权利要求1-4任一项，或权利要求15-18任一项所述的接入方法。
  30. 一种计算机可读存储介质，包括计算机程序，当其在计算机上运行时，使得所述计算机执行如权利要求5-8任一项，或权利要求19-21任一项所述的切换方法。
  31. 一种计算机程序产品，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得计算机执行如权利要求1-4任一项，或权利要求15-18任一项所述的 接入方法。
  32. 一种计算机程序产品，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得计算机执行如权利要求5-8任一项，或权利要求19-21任一项所述的切换方法。
  33. 一种用来执行权利要求1-4任一项，或权利要求15-18任一项所述的接入方法的装置。
  34. 一种用来执行权利要求5-8任一项，或权利要求19-21任一项所述的切换方法的装置。
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