CN117729526A

CN117729526A - Communication roaming method, system, device and storage medium

Info

Publication number: CN117729526A
Application number: CN202311705515.7A
Authority: CN
Inventors: 邱涛; 仪鲁男; 程晓军; 何旭; 肖征荣; 赵为; 杨金欣
Original assignee: China United Network Communications Group Co Ltd; China Unicom Global Ltd
Current assignee: China United Network Communications Group Co Ltd; China Unicom Global Ltd
Priority date: 2023-12-12
Filing date: 2023-12-12
Publication date: 2024-03-19

Abstract

The application provides a communication roaming method, a system, a device and a storage medium, relates to the technical field of communication, and can solve the problem that terminal equipment roaming internationally cannot use a domestic 5G SA network at present. The method comprises the following steps: the method comprises the steps that core network equipment in a first area responds to a registration request initiated by terminal equipment to a second system network, authentication data are successfully requested to the core network equipment in the second area through the first system network after the first core network equipment fails to acquire the authentication vector to the core network equipment in the second area through the second system network, roaming service of the second system network is signed and registered, a successful registration result of the second system network is generated, and a successful registration result of the second system network is sent to the terminal equipment. The terminal equipment can be enabled to have the capability of using the network of the second system in the first area.

Description

Communication roaming method, system, device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method, a system, an apparatus, and a storage medium for roaming communications.

Background

Non-independent Networking (NSA) generally refers to coexistence of a fourth generation mobile communication technology (the 4th generation mobile communication technology,4G) base station and a fifth generation mobile communication technology (5th generation mobile communication technology,5G) base station, and the core network adopts a networking architecture of a 4G core network or a 5G core network. And independent networking (SA) refers to a networking architecture in which a 5G base station is used and a core network is a 5G core network.

Currently, an international roaming terminal can access an SA network of a domestic operator through a 5GC core network of the international operator; the system can also access to the NSA network of the domestic operator through the 4G core network of the international operator.

However, with the gradual shutdown of the national NSA network, the national operators may have no NSA network and no SA network. Whereas international operators typically have only NSA networks and no SA networks. For terminal equipment of international roaming, the terminal equipment can not register to SA network of domestic operator during international roaming, so that the terminal equipment can not use 5G network, and experience of user is reduced.

Disclosure of Invention

The application provides a communication roaming method, a system, a device and a storage medium, solves the problem that the terminal equipment of the international roaming cannot use the domestic 5G SA network at present, and can finish the registration of the international roaming terminal in the domestic 5G SA network, so that the terminal can use the domestic 5G SA network, and the reliability of the communication roaming is greatly enhanced.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, the present application provides a communication roaming method, applied to a core network device in a first area, where the method includes: responding to the registration information of the second standard network from the terminal equipment to the first area, and acquiring authentication data of the first standard network; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is a second area; the core network equipment of the second area supports a first system network and does not support a second system network; signing registration is carried out on roaming service of the second system network based on authentication data of the first system network, and a successful registration result of the second system network is generated; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network; and sending a successful registration result of the second system network to the terminal equipment.

With reference to the first aspect, in one possible implementation manner, the method further includes: sending a first request message to core network equipment of a second area; the first request message is used for requesting the signed service of the terminal equipment; receiving contracted service from core network equipment in the second area; if the signed service does not contain the roaming service of the second system network, signing to generate the roaming service of the second system network, and determining the successful registration result of the second system network.

With reference to the first aspect, in one possible implementation manner, the method further includes: receiving registration information of a first standard network from terminal equipment; the registration information of the first system network is sent by the terminal equipment after receiving the authentication failure result of the second system network; responding to the registration information of the first standard network, and sending request information to core network equipment of a second area; the request information is used for requesting authentication data of the terminal equipment; receiving authentication data from core network equipment of a second area; signing and registering the terminal equipment in the first standard network based on the authentication data, and generating a successful registration result of the first standard network; and sending a successful registration result of the first standard network to the terminal equipment.

With reference to the first aspect, in one possible implementation manner, the method further includes: receiving registration information of the terminal equipment to the second system network; determining a source registration area of the terminal equipment according to the operator identification information of the terminal equipment; under the condition that the source registration area is a second area, request information is sent to core network equipment of the second area through a second standard network; the request information is used for requesting authentication data of the terminal equipment; receiving an authentication failure result returned by core network equipment from a second area; the authentication failure result is used for representing that the request of the core network equipment of the second area for authentication data fails; and returning an authentication failure result to the terminal equipment.

In a second aspect, the present application provides a communication roaming method applied to a terminal device, where the terminal device is in a range of a first area; the source registration area of the terminal equipment is a second area; the method comprises the following steps: responding to a successful registration result of the first standard network, and sending registration information of the second standard network to core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network, and the registration information of the second standard network is used for indicating the core network equipment of the first area to acquire the authentication data of the first standard network, wherein the authentication data of the first standard network is the authentication data acquired by the first standard network equipment of the first area through the first standard network after the authentication data request of the core network equipment of the second area fails; receiving a successful registration result in the second system network; the successful registration result is used for indicating that the core network equipment of the first area successfully registers roaming service of the second standard network based on authentication data of the first standard network, and the successful registration result is also used for indicating that the terminal equipment successfully registers in the second standard network.

With reference to the second aspect, in one possible implementation manner, the method further includes: responding to an authentication failure result of the second system network, and sending registration information of the first system network to core network equipment of the first area; the authentication failure result is used for representing that the core network equipment of the first area requests authentication data failure from the core network equipment of the second area through the second standard network; the registration information of the first standard network is used for registering the use right of the terminal equipment in the first standard network; and receiving a successful registration result in the first standard network.

With reference to the second aspect, in one possible implementation manner, the method further includes: transmitting registration information of a second system network to core network equipment of a first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network; and receiving an authentication failure result.

In a third aspect, the present application provides a communication roaming device, the device comprising: a communication unit and a processing unit; the communication unit is used for responding to the registration information of the second standard network from the terminal equipment to the first area and acquiring the authentication data of the first standard network; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is a second area; the core network equipment of the second area supports a first system network and does not support a second system network; the processing unit is used for signing and registering roaming service of the second system network based on authentication data of the first system network and generating a successful registration result of the second system network; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network; and the communication unit is also used for sending the successful registration result of the second standard network to the terminal equipment.

With reference to the third aspect, in one possible implementation manner, the processing unit is specifically configured to: the communication unit is instructed to send a first request message to core network equipment in a second area; the first request message is used for requesting the signed service of the terminal equipment; the communication unit is instructed to receive contracted service from core network equipment in the second area; if the signed service does not contain the roaming service of the second system network, signing to generate the roaming service of the second system network, and determining the successful registration result of the second system network.

With reference to the third aspect, in one possible implementation manner, the communication unit is further configured to receive registration information of the terminal device to the first standard network; the registration information of the first system network is sent by the terminal equipment after receiving the authentication failure result of the second system network; the processing unit is further used for responding to the registration information of the first standard network and indicating the communication unit to send request information to the core network equipment of the second area; the request information is used for requesting authentication data of the terminal equipment; the communication unit is also used for receiving authentication data from the core network equipment of the second area; the processing unit is also used for signing and registering the terminal equipment in the first standard network based on the authentication data, and generating a successful registration result of the first standard network; and the communication unit is also used for sending the successful registration result of the first standard network to the terminal equipment.

With reference to the third aspect, in one possible implementation manner, the communication unit is further configured to receive registration information of the terminal device to the second standard network; the processing unit is also used for determining a source registration area of the terminal equipment according to the operator identification information of the terminal equipment; the processing unit is further configured to instruct the communication unit to send request information to a core network device in the second area through the second standard network when the source registration area is the second area; the request information is used for requesting authentication data of the terminal equipment; the communication unit is also used for receiving authentication failure results returned by the core network equipment in the second area; the authentication failure result is used for representing that the request of the core network equipment of the second area for authentication data fails; and the communication unit is also used for returning an authentication failure result to the terminal equipment.

In a fourth aspect, the present application provides a communication roaming device, the device comprising: a communication unit; the communication unit is used for responding to the successful registration result of the first standard network and sending registration information of the second standard network to the core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network, and the registration information of the second standard network is used for indicating the core network equipment of the first area to acquire the authentication data of the first standard network, wherein the authentication data of the first standard network is the authentication data acquired by the first standard network equipment of the first area through the first standard network after the authentication data request of the core network equipment of the second area fails; the communication unit is also used for receiving a successful registration result in the second standard network; the successful registration result is used for indicating that the core network equipment of the first area successfully registers roaming service of the second standard network based on authentication data of the first standard network, and the successful registration result is also used for indicating that the terminal equipment successfully registers in the second standard network.

With reference to the fourth aspect, in a possible implementation manner, the apparatus includes a processing unit; the processing unit is used for responding to the authentication failure result of the second system network and indicating the communication unit to send registration information of the first system network to the core network equipment of the first area; the authentication failure result is used for representing that the core network equipment of the first area requests authentication data failure from the core network equipment of the second area through the second standard network; the registration information of the first standard network is used for registering the use right of the terminal equipment in the first standard network; and the communication unit is also used for receiving the successful registration result in the first standard network.

With reference to the fourth aspect, in one possible implementation manner, the communication unit is further configured to: transmitting registration information of a second system network to core network equipment of a first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network; and receiving an authentication failure result.

In a fifth aspect, the present application provides a communication roaming device, the device comprising: a processor and a communication interface; the communication interface is coupled to a processor for running a computer program or instructions to implement the communication roaming method as described in the first aspect, any one of the possible implementations of the first aspect, the second aspect and any one of the possible implementations of the second aspect.

In a sixth aspect, the present application provides a computer readable storage medium having instructions stored therein which, when run on a terminal, cause the terminal to perform a communication roaming method as described in the first aspect, any one of the possible implementations of the first aspect, the second aspect and any one of the possible implementations of the second aspect.

In a seventh aspect, the present application provides a computer program product comprising instructions which, when run on a communication roaming device, cause the communication roaming device to perform a communication roaming method as described in any one of the possible implementations of the first aspect and the first aspect.

In an eighth aspect, the present application provides a chip comprising a processor and a communications interface, the communications interface and the processor being coupled, the processor being for running a computer program or instructions to implement a communications roaming method as described in any one of the possible implementations of the first aspect and the first aspect.

In particular, the chip provided in the present application further includes a memory for storing a computer program or instructions.

It should be noted that the above-mentioned computer instructions may be stored in whole or in part on a computer-readable storage medium. The computer readable storage medium may be packaged together with the processor of the apparatus or may be packaged separately from the processor of the apparatus, which is not limited in this application.

In a ninth aspect, the present application provides a communication roaming system, including: a terminal device, a core network device of a first area, and a core network device of a second area, wherein the core network device of the first area is configured to perform a communication roaming method as described in any one of the possible implementations of the first aspect and the first aspect, and the terminal device is configured to perform a communication roaming method as described in any one of the possible implementations of the second aspect and the second aspect.

The description of the second to ninth aspects in the present application may refer to the detailed description of the first aspect; also, the advantageous effects described in the second aspect to the ninth aspect may refer to the advantageous effect analysis of the first aspect, and are not described herein.

In this application, the names of the above communication roaming apparatuses do not constitute limitations on the devices or function modules themselves, and in actual implementation, these devices or function modules may appear under other names. Insofar as the function of each device or function module is similar to the present application, it is within the scope of the claims of the present application and the equivalents thereof.

These and other aspects of the present application will be more readily apparent from the following description.

The scheme at least brings the following beneficial effects: based on the technical scheme, the core network device of the first area responds to the registration request initiated by the terminal device to the second system network, after the first core network device fails to acquire the authentication vector to the core network device of the second area through the second system network, the first core network device successfully requests to acquire the authentication data to the core network device of the second area through the first system network, signs up for roaming service of the second system network, generates a successful registration result of the second system network, and sends the successful registration result of the second system network to the terminal device, so that the terminal device has the capability of using the second system network in the first area. Compared with the problem that the terminal equipment roaming internationally cannot use the domestic 5G SA network at present, the technical scheme can finish the registration of the international roaming terminal in the domestic 5G SA network, so that the terminal can use the domestic 5G SA network, and the reliability of communication roaming is greatly enhanced.

Drawings

Fig. 1 is a schematic diagram of communication roaming according to an embodiment of the present application;

fig. 2 is a schematic architecture diagram of a communication roaming system according to an embodiment of the present application;

Fig. 3 is a schematic architecture diagram of another communication roaming system according to an embodiment of the present application;

fig. 4 is a schematic hardware structure of a communication roaming device according to an embodiment of the present application;

fig. 5 is a flowchart of a communication roaming method provided in an embodiment of the present application;

FIG. 6 is a flowchart of another communication roaming method according to an embodiment of the present application;

FIG. 7 is a flowchart of another communication roaming method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication roaming device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another communication roaming device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The terms "first" and "second" and the like in the description and in the drawings are used for distinguishing between different objects or for distinguishing between different processes of the same object and not for describing a particular sequential order of objects.

Furthermore, references to the terms "comprising" and "having" and any variations thereof in the description of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more.

NSA generally refers to coexistence of a 4G base station and a 5G base station, and a core network adopts a networking architecture of a 4G core network or a 5G core network. And SA refers to a networking architecture adopting a 5G base station and a core network adopting a 5G core network.

Currently, as shown in fig. 1, an international roaming terminal may access an SA network of a home operator through a 5G core network of the international operator and a 5G core network of the home operator; the system can also access to the NSA network of the domestic operator through the 4G core network of the international operator and the 4G core network of the domestic operator.

In view of this, in the communication roaming method provided by the present application, the core network device in the first area responds to the registration request initiated by the terminal device to the second standard network, after the first core network device fails to acquire the authentication vector to the core network device in the second area through the second standard network, the first core network device successfully requests to acquire the authentication data to the core network device in the second area through the first standard network, signs up for the roaming service in the second standard network, generates a registration success result of the second standard network, and sends the registration success result of the second standard network to the terminal device, so that the terminal device has the capability of using the second standard network in the first area. Compared with the problem that the terminal equipment roaming internationally cannot use the domestic 5G SA network at present, the technical scheme can finish the registration of the international roaming terminal in the domestic 5G SA network, so that the terminal can use the domestic 5G SA network, and the reliability of communication roaming is greatly enhanced.

The following describes embodiments of the present application in detail with reference to the drawings.

Fig. 2 is a schematic diagram of a communication roaming system according to an embodiment of the present application. As shown in fig. 2, the communication roaming system includes: terminal equipment 201, first core network equipment 202, 5GC gateway 203, and second core network equipment 204.

Wherein the terminal device 201 and the first core network device 202 are connected by a communication link. The first core network device 202 and the 5GC gateway 203 are connected by a communication link. The 5GC gateway 203 and the second core network device 204 are connected by a communication link. The communication link may be a wired communication link or a wireless communication link, which is not limited in this application.

The terminal device 201, the first core network device 202, and the 5GC gateway 203 are located in the first area. The second core network device 204 is located in a second area.

Hereinafter, the terminal device 201 will be specifically described.

In a possible implementation, the terminal device 201 and the first core network device 202 may be communicatively connected through a network device. When the terminal device 201 is located in the first area, registration information for the first standard network and registration information for the second standard network are transmitted to the first core network device 202 through the network device.

It should be noted that, the terminal device 201 supports NSA/SA dual mode, and can initiate IP multimedia system (IP multimedia subsystem, IMS) PDU session creation at the visited place.

The terminal device in the embodiment of the present application may also be an entity on the user side for receiving signals, or transmitting signals, or receiving signals and transmitting signals. The terminal device is configured to provide one or more of a voice service and a data connectivity service to a user. A terminal device can also be called a User Equipment (UE), terminal, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal device may be a vehicle networking (vehicle to everything, V2X) device, such as a smart car (smart car or intelligent car), a digital car (digital car), an unmanned car (unmanned car or driverless car or pilot car or automatic), an automatic car (self-driving car or automatic car), a pure electric car (pure EV or Battery EV), a hybrid car (hybrid electric vehicle, HEV), an extended electric car (REEV), a plug-in hybrid car (PHEV), a new energy car (new energy vehicle), and the like. The terminal device may also be a device-to-device (D2D) device, such as an electricity meter, water meter, etc.

The terminal device may also be a Mobile Station (MS), a subscriber unit (subscriber unit), an unmanned aerial vehicle, an internet of things (internet of things, ioT) device, a station in WLAN, a cellular phone (cell phone), a smart phone (smart phone), a cordless phone, a wireless data card, a tablet, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital processing (personal digital assistant, PDA) device, a laptop (captop computer), a machine type communication (machine type communication, MTC) terminal, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device (which may also be referred to as a wearable smart device). The terminal device may also be a terminal device in a next generation communication system, for example, a terminal device in a 5G system or a terminal device in a future evolved PLMN, a terminal device in an NR system, etc.

The network device in the embodiment of the present application is an entity on the network side for sending a signal, or receiving a signal, or sending a signal and receiving a signal. The network device may be a means deployed in a radio access network (radio access network, RAN) to provide wireless communication functionality for the terminal device, e.g. may be a TRP, a base station (e.g. an evolved NodeB, eNB or eNodeB), a next generation base station node (next generation node base station, gNB), a next generation eNB (next generation eNB, ng-eNB), etc.), various forms of control nodes (e.g. network controllers, radio controllers (e.g. radio controllers in the context of a cloud radio access network (cloud radio access network, CRAN)), a Road Side Unit (RSU), etc. Specifically, the network device may be a macro base station, a micro base station (also referred to as a small station), a relay station, an Access Point (AP), or the like in various forms, or may be an antenna panel of the base station. The control node can be connected with a plurality of base stations and can configure resources for a plurality of terminal devices covered by the plurality of base stations. In systems employing different radio access technologies (radio access technology, RAT), the names of base station enabled devices may vary. For example, the LTE system may be referred to as an eNB or an eNodeB, the 5G system or an NR system may be referred to as a gNB, and specific names of network devices are not limited in this application.

Hereinafter, the first core network device 202 will be specifically described.

In a possible implementation, as shown in fig. 3, the first core network device 202 may include a network registration (NF repository function, LNRF) network element, an access and mobility management (access and mobility management function, AMF) network element, a mobility management entity (mobile management entity, MME).

It should be noted that the AMF network element turns off the authentication switch registered from the 4G to the 5G network.

Optionally, the first core network device 202 may further include a session management (session management function, SMF) network element, a user plane function (user plane function, UPF) network element, and a user plane processing (SGW) network element.

Hereinafter, the 5GC gateway 203 will be specifically described.

In one possible implementation, as shown in fig. 3, the 5GC gateway 203 may include an interworking NRF (interconnection network repository function, INRF) network element, an interworking routing proxy (international diameter routing agent, IDRA) network element, a (interworking function, IWF) network element, a policy control function (policy control function, PCF) network element, a unified data management function (unified data management, UDM) network element, a data gateway, and a voice gateway.

It should be noted that the INRF network element is used for service discovery of IWF and SMF network elements. The IWF network element is configured to implement a hypertext transfer protocol (hypertext transfer protocol, HTTP) servitization interface of the first area, a Gr interface and diameter interface protocol conversion of the second area, and a 4G/5G subscription data conversion. The IDRA network element realizes diameter protocol intercommunication between the first area and the second area, and the proxy (proxy) SMF/UPF gateway completes 4G/5G intercommunication interaction. PCF network elements are used for IMS PDU session creation.

In one example, the data gateway may be comprised of an SMF network element and a UPF network element. The voice gateway may be composed of an SMF network element and a UPF network element.

Hereinafter, the second core network device 204 will be specifically described.

In a possible implementation, as shown in fig. 3, the second Core network device 204 may comprise a CS Core network element, a home subscriber server (home subscriber server, HSS)/home location register (home location register, HLR) network element. The HSS/HLR network element is configured to provide authentication data of the terminal device to the first core network device 202.

It should be noted that the HSS/HLR network element does not support the return of authentication data (e.g., authentication quintuple) via the second-system network. The terminal device signs and supports Home Routing (HR) roaming function in the HSS network element in advance.

Optionally, the second core network device 204 may further include a policy and charging control (policy and charging rule function, PCRF) network element, a PDN Gateway (PGW).

The second core network device 204 additionally supports sending authentication vectors.

Hereinafter, other devices in the communication roaming system will be described in detail.

In one possible implementation, the communication roaming system further includes an international roaming communication gateway.

Wherein the international diffuse communication gateway is connected with the 5GC gateway office 203 through a communication link. The international diffuse communication gateway is connected to the 5GC gateway 203 via a communication link.

In one example, the international roaming communication gateway is configured to enable an IMS-based voice interworking function in a first area with circuit switched (circuited switched, CS) voice in a second area after a user has achieved registration with a second-mode network.

When implemented in hardware, the various modules in the communication roaming system may be integrated into the hardware architecture of the communication roaming device as shown in fig. 4. Specifically, as shown in fig. 4, the basic hardware structure of the communication roaming device is described.

Fig. 4 is a schematic structural diagram of a communication roaming device according to an embodiment of the present application. As shown in fig. 4, the communication roaming device comprises at least one processor 401, a communication line 402, and at least one communication interface 404, and may further comprise a memory 403. The processor 401, the memory 403, and the communication interface 404 may be connected by a communication line 402.

The processor 401 may be a central processing unit (central processing unit, CPU), may be an integrated circuit (application specific integrated circuit, ASIC), or may be one or more integrated circuits configured to implement embodiments of the present application, such as: one or more digital signal processors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA).

Communication line 402 may include a path for communicating information between the components described above.

The communication interface 404, for communicating with other devices or communication networks, may use any transceiver-like device, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.

The memory 403 may be, but is not limited to, 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 type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc (compact disc read-only memory) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to contain or store the desired program code in the form of instructions or data structures and that can be accessed by a computer.

In a possible design, the memory 403 may exist independent of the processor 401, i.e. the memory 403 may be a memory external to the processor 401, where the memory 403 may be connected to the processor 401 through a communication line 402, for storing execution instructions or application program codes, and the execution is controlled by the processor 401, to implement a communication roaming method provided in the embodiments described below. In yet another possible design, the memory 403 may be integrated with the processor 401, i.e., the memory 403 may be an internal memory of the processor 401, e.g., the memory 403 may be a cache, and may be used to temporarily store some data and instruction information, etc.

As one possible implementation, processor 401 may include one or more CPUs, such as CPU0 and CPU1 in fig. 4. As another possible implementation, the communication roaming device may include multiple processors, such as processor 401 and processor 407 in fig. 4. As yet another possible implementation, the communication roaming apparatus may further include an output device 405 and an input device 406.

It should be noted that, the embodiments of the present application may refer to or refer to each other, for example, the same or similar steps, and the method embodiment, the system embodiment and the device embodiment may refer to each other, which is not limited.

Fig. 5 is a flowchart of a communication roaming method according to an embodiment of the present application, where the method may be applied to the communication roaming system shown in fig. 2. As shown in fig. 5, the method includes the following S501-S504.

S501, the terminal equipment sends registration information of the second standard network to the first core network equipment. Correspondingly, the first core network device receives registration information of the terminal device to the second standard network.

The registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network.

It should be noted that, the registration information for the second standard network is sent to the first core network device after the terminal device is successfully registered in the first standard network.

In an example, the first standard network may be a 4G LTE network and the second standard network may be a 5G SA network. After receiving the successful registration result in the 4G LTE network, the terminal equipment tries to carry a globally unique temporary UE identifier (globally unique temporary UE identity, GUTI) and sends the registration information of the 5G SA network to the first core network equipment again.

S502, the first core network equipment responds to the registration information of the second standard network to acquire authentication data of the first standard network.

The authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network.

In one example, an AMF network element in a first core network device obtains an authentication quadruple from an MME network element through an N26 interface.

It should be noted that, the authentication quadruple is pre-stored in the MME network element in the first core network device. And, after the AMF network element obtains the authentication quadruple from the MME network element through the N26 interface, authentication to the authentication service function (authentication server function, AUSF) is not required.

The core network device in the second area supports communication through the first system network, and does not support communication through the second system network.

Further, after the AMF network element obtains the authentication quadruple from the MME network element through the N26 interface, the AMF network element sends security mode command signaling to the terminal device, so as to instruct the terminal device to use the authentication quadruple for message encryption and integrity protection in subsequent communication. Correspondingly, the terminal device sends security mode complete signaling to the AMF network element to inform the AMF network element that the authentication quadruple has been received.

S503, the first core network device signs up for roaming service of the second standard network based on authentication data of the first standard network, and generates a successful registration result of the second standard network.

The successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network.

In one example, an AMF network element in a first core network device initiates a subscription slice information acquisition procedure to a UDM network element through an IWF network element. Correspondingly, the UDM network element returns subscription slice information to the AMF network element through the IWF network element according to the local configuration information, so that the first core network device decides to allocate corresponding network slice resources to the terminal device according to the subscription slice condition of the user. Then, the AMF network element in the first core network equipment initiates a registration flow of the corresponding network slice to the UDM network element through the IWF network element, and completes registration.

In one possible implementation manner, the process of signing up and registering the roaming service of the second standard network by the first core network device may be specifically implemented by the following steps 1 to 3.

Step 1, a first core network device sends a first request message to a second core network device. Correspondingly, the second core network device receives the first request message from the first core network device.

The first request message is used for requesting the signed service of the terminal equipment.

In one example, the first request message is exemplified as a ULR message. The AMF network element in the first core network device sends ULR information to the HSS/HLR network element in the second core network device through the IDRA network element.

It will be appreciated that ULR messages themselves have the function of determining the corresponding core network device based on the location of the terminal device.

And step 2, the second core network equipment sends the subscription service of the terminal equipment to the first core network equipment. Correspondingly, the first core network device receives the subscribed service from the terminal device of the second core network device.

In one example, the HSS/HLR network element in the second core network device sends the subscribed services of the terminal device to the IDRA network element in the form of ULA messages.

The ULA message does not carry ARD information, which indicates that the terminal device has no access restriction, and the identifier in the ULA message supports DCNR, that is, the terminal device supports both the 4G LTE network and the 5G SA network.

And step 3, if the subscribed service does not contain the roaming service of the second system network, the first core network equipment signs up to generate the roaming service of the second system network, and a successful registration result of the second system network is determined.

In one example, the roaming service of the second standard network is taken as an IMS roaming service. The IDRA network element completes the generation of the subscription data of the IMS roaming service aiming at the scene of the non-subscription IMS roaming service. And then, the IDRA network element transmits the generated subscription data of the IMS roaming service to the IWF network element through the ULA message, so that the IWF network element completes 4G/5G subscription data mapping. And the IWF network element sends a successful registration result to the AMF network element in the first core network device.

Further, the AMF network element in the first core network device sends subscription data requesting subscription to the IMS roaming service to the IWF network element. Correspondingly, the IWF network element returns the subscription data of the IMS roaming service to the AMF network element.

S504, the first core network equipment sends a successful registration result of the second standard network to the terminal equipment. Correspondingly, the terminal equipment receives a successful registration result from the first core network equipment in the second standard network.

In one example, the first core network device sends an IMS roaming service registration success result to the terminal device, so that the terminal device can implement the IMS roaming service through the 5G SA network.

Furthermore, when the terminal device can realize the IMS roaming service through the 5G SA network, the terminal device can realize the intercommunication function based on IMS voice in the first area and CS voice in the second area after the user realizes the registration to the second standard network through the international roaming communication gateway.

Optionally, if the terminal device is a scenario from the 4G LTE network to the 5G SA network, the AMF network element in the first core network device needs to complete an update procedure such as session innovation through the SMF network element. Then, the AMF network element returns a registration success message to the terminal equipment to complete the registration flow. After the terminal equipment completes registration in the 5G SA network, specific data service and the like can be performed.

Based on the above technical solution, in one aspect, in the communication roaming method provided in the present application, the terminal device sends registration information for the second standard network to the core network device in the first area in response to a successful registration result of the first standard network, so as to instruct the core network device in the first area to obtain authentication data of the first standard network. And then, the terminal equipment receives a successful registration result of successful registration of the roaming service of the second standard network based on the authentication data of the first standard network by the core network equipment of the first area so as to have the capability of using the second standard network in the first area. Compared with the problem that the terminal equipment roaming internationally can not use the domestic 5G SA network at present, the terminal equipment can greatly enhance the reliability of communication roaming through the technical scheme.

On the other hand, in the communication roaming method provided by the application, the core network device in the first area responds to the registration request initiated by the terminal device to the second system network, after the first core network device fails to acquire the authentication vector to the core network device in the second area through the second system network, the first core network device successfully requests to acquire the authentication data to the core network device in the second area through the first system network, signs up for the roaming service of the second system network, generates a successful registration result of the second system network, and sends the successful registration result of the second system network to the terminal device, so that the terminal device has the capability of using the second system network in the first area. Compared with the problem that the terminal equipment roaming internationally cannot use the domestic 5G SA network at present, the technical scheme can finish the registration of the international roaming terminal in the domestic 5G SA network, so that the terminal can use the domestic 5G SA network, and the reliability of communication roaming is greatly enhanced.

As one possible embodiment of the present application, in conjunction with fig. 5, as shown in fig. 6, before S501 described above, the procedure of registering in the first-system network may be implemented by the following S601-S605.

S601, the terminal equipment responds to an authentication failure result of the second system network and sends registration information of the first system network to the first core network equipment. Correspondingly, the first core network device receives registration information of the terminal device to the first standard network.

The authentication failure result is used for representing that the request of authentication data from the second core network equipment fails.

The registration information of the first standard network is used for registering the use right of the terminal equipment in the first standard network.

The first standard network may be a 4G LTE network, and the second standard network may be a 5G SA network.

In an example, after receiving the authentication failure result, the terminal device initiates a registration procedure to the 4G LTE network of the first area.

Specifically, the terminal device sends registration information for the 4G LTE network to a first core network device in the first area.

S602, the first core network equipment responds to the registration information of the first standard network and sends request information to the second core network equipment. Correspondingly, the second core network device receives the request information from the first core network device.

Wherein the request information is used for requesting authentication data of the terminal device.

In one example, a first core network device sends request information for requesting authentication data of a terminal device to an HSS/HLR network element in a second core network device through an IDRA network element in a 5GC gateway.

It should be noted that, the source registration area of the terminal device is the second area, so that authentication data needs to be acquired from the second core network device where the registration area is located.

And S603, the second core network equipment responds to the request information and sends authentication data to the first core network equipment. Correspondingly, the first core network device receives authentication data from the second core network device.

Wherein the authentication data may be an authentication quadruple.

In one example, since the second core network device supports communication with the first core network device through the 4G LTE network, the HSS/HLR network element in the second core network device may return the authentication quadruple to the first core network device through the IDRA network element in the 5GC gateway based on the 4G LTE network in response to the request information.

And S604, the first core network equipment completes registration in the first standard network based on the authentication data.

In one example, the first core network device completes registration of the terminal device in the 4GLTE network based on the authentication quadruple.

S605, the first core network device sends a successful registration result in the first standard network to the terminal device. Correspondingly, the terminal equipment receives a successful registration result in the first standard network.

In one example, the first core network device sends a registration success result to the terminal device after completing registration of the terminal device in the 4G LTE network.

Based on the technical scheme, the terminal equipment responds to the authentication failure result of the second system network and sends registration information of the first system network to the first core network equipment. The first core network device responds to the registration information of the first standard network and sends request information to the second core network device. The second core network device transmits authentication data to the first core network device in response to the request information. The first core network equipment completes registration in the first standard network based on the authentication data, and sends a successful registration result in the first standard network to the terminal equipment. According to the technical scheme, after authentication in the second system network fails, the terminal equipment can request the second core network equipment to obtain authentication data through the first system network, and complete registration in the first system network, so that subsequent re-registration in the second system network of the terminal equipment can be conveniently completed based on the authentication data.

As a possible embodiment of the present application, as shown in fig. 6 and fig. 7, the procedure of registering the second-system network for the first time before S601 described above may be implemented by the following S701-S706.

S701, the terminal equipment sends registration information of a second system network to core network equipment of a first area. Correspondingly, the first core network device receives registration information of the terminal device to the second standard network.

In one example, the second-system network is a 5G SA network. The first area supports 5GSA network communication, and the terminal equipment supports 4G LTE network and 5G SA network simultaneously. And when the terminal equipment is located in the first area, initiating a registration flow for the 5G SA network to first core network equipment in the first area.

S702, the first core network device determines a source registration area of the terminal device according to the operator identification information of the terminal device.

In an example, an AMF network element in a first core network device initiates a registration request to an LNRF network element for a 5GSA network, and the LNRF network element discovers that authentication is required according to the registration request (authentication server function, AUSF), and determines a source registration area of the terminal device according to operator identification information (target PLMN) of the terminal device.

S703, the first core network device sends request information to the second core network device through the second standard network when the source registration area is the second area. Correspondingly, the second core network device is configured to receive the request information from the first core network device.

The request information is used for requesting authentication data of the terminal equipment.

In one example, the LNRF network element sends request information to the INRF network element in the case where the source registration area is the second area. And the INRF network element judges that the authentication data of the 5G SA network is not carried out to the second core network equipment. Then, the INRF network element sends IWF information to an AMF network element of the first core network device, indicating the AMF network element to request authentication data to an HSS/HLR network element of the second core network device through the IWF network element.

S704, the second core network equipment responds to the request information to authenticate the second standard network, and an authentication failure result of the second standard network is obtained.

Specifically, the second core network device does not support the return of authentication data to the first core network device through the second standard network, so that an authentication failure result of the second standard network is obtained.

And S705, the second core network equipment sends an authentication failure result to the first core network equipment. Correspondingly, the first core network device receives an authentication failure result returned by the core network device from the second area.

The authentication failure result is used for representing that the request of the core network equipment of the second area for authentication data fails. The authentication failure result may be 403 fortidden and an error code. The error code may be #22 focus or #111, #27, etc.

In one example, the HSS/HLR network element in the second core network device returns an authentication failure result to the IWF network element. Then, the IWF network element sends authentication failure result to the AMF network element.

S706, the first core network equipment returns an authentication failure result to the terminal equipment. Correspondingly, the terminal equipment receives the authentication failure result.

In one example, authentication failure results are used as meaning that authentication is required by the MME. The first core network equipment returns a result of being authenticated by the MME to the terminal equipment, so that the terminal equipment resides in a current cell after receiving the result of being authenticated by the MME, and initiates registration of the 5G SA network again after preset time.

The preset time may be set by a timer T3346, and the preset time may be a random value between 15 and 30 minutes.

Based on the technical scheme, the terminal equipment sends registration information of the second system network to core network equipment of the first area. The first core network device determines a source registration area of the terminal device according to the operator identification information of the terminal device. And the first core network equipment sends request information to the second core network equipment through the second standard network under the condition that the source registration area is the second area. And the second core network equipment responds to the request information and authenticates the authentication of the second standard network to obtain an authentication failure result of the second standard network. And the second core network equipment returns an authentication failure result to the terminal equipment through the first core network equipment. Through the technical scheme, the failure result that the terminal equipment directly registers with the second system network can be obtained, and the subsequent re-registration of the second system network through the first system network is facilitated.

The embodiment of the application may divide the functional modules or functional units of the communication roaming device according to the above method example, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware, or in software functional modules or functional units. The division of the modules or units in the embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice.

As shown in fig. 8, a schematic structural diagram of a communication roaming device 80 according to an embodiment of the present application is provided, where the communication roaming device 80 includes: communication unit 801 and processing unit 802.

A communication unit 801, configured to obtain authentication data of a first standard network in response to registration information of a second standard network from a terminal device to the first area; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is a second area; the core network device of the second area supports the first system network and does not support the second system network.

A processing unit 802, configured to sign up for roaming service of the second standard network based on authentication data of the first standard network, and generate a successful registration result of the second standard network; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network.

The communication unit 801 is further configured to send a registration success result of the second standard network to the terminal device.

The processing unit 802 is specifically configured to: the instruction communication unit 801 sends a first request message to the core network device of the second area; the first request message is used for requesting the signed service of the terminal equipment; the instruction communication unit 801 receives the subscribed service from the core network device of the second area; if the signed service does not contain the roaming service of the second system network, signing to generate the roaming service of the second system network, and determining the successful registration result of the second system network.

A communication unit 801, configured to receive registration information of the terminal device to the first standard network; the registration information of the first standard network is sent by the terminal equipment after receiving the authentication failure result of the second standard network.

The processing unit 802 is further configured to instruct the communication unit 801 to send request information to a core network device in the second area in response to the registration information of the first standard network; the request information is used to request authentication data of the terminal device.

The processing unit 802 is further configured to sign up for and register the terminal device in the first standard network based on the authentication data, and generate a successful registration result of the first standard network.

The communication unit 801 is further configured to send a registration success result of the first standard network to the terminal device.

The communication unit 801 is further configured to receive authentication data from a core network device of the second area.

The communication unit 801 is further configured to receive registration information of the terminal device to the second standard network.

The processing unit 802 is further configured to determine a source registration area of the terminal device according to the operator identification information of the terminal device.

The processing unit 802 is further configured to instruct the communication unit 801 to send request information to a core network device of the second area through the second standard network when the source registration area is the second area; the request information is used to request authentication data of the terminal device.

A communication unit 801, configured to receive an authentication failure result returned from the core network device in the second area; the authentication failure result is used for representing that the request of the core network equipment of the second area for authentication data fails.

The communication unit 801 is further configured to return an authentication failure result to the terminal device.

In a possible implementation manner, the communication roaming device 80 may further include a storage unit 803 (shown in a dashed box in fig. 8), where the storage unit 803 stores a program or an instruction, which when executed by the processing unit 802, enables the communication roaming device 80 to perform the communication roaming method described in the above method embodiment.

As shown in fig. 9, a schematic structural diagram of a communication roaming device 90 according to an embodiment of the present application is provided, where the communication roaming device 90 includes: communication section 901 and processing section 902.

The communication unit 901 is further configured to send registration information for the second standard network to the core network device in the first area in response to a successful registration result of the first standard network; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network, and the registration information of the second standard network is used for indicating the core network equipment of the first area to acquire the authentication data of the first standard network, wherein the authentication data of the first standard network is the authentication data acquired by the first standard network equipment of the first area through the first standard network after the authentication data request of the core network equipment of the second area through the second standard network fails.

The communication unit 901 is further configured to receive a result of successful registration in the second standard network; the successful registration result is used for indicating that the core network equipment of the first area successfully registers roaming service of the second standard network based on authentication data of the first standard network, and the successful registration result is also used for indicating that the terminal equipment successfully registers in the second standard network.

A processing unit 902, configured to instruct, in response to a result of authentication failure of the second standard network, the communication unit 901 to send registration information for the first standard network to a core network device in the first area; the authentication failure result is used for representing that the core network equipment of the first area requests authentication data failure from the core network equipment of the second area through the second standard network; the registration information of the first standard network is used for registering the use right of the terminal equipment in the first standard network.

And a communication unit 901, configured to receive a result of successful registration in the first standard network.

The communication unit 901 is further configured to: transmitting registration information of a second system network to core network equipment of a first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network; and receiving an authentication failure result.

In a possible implementation manner, the communication roaming device 90 may further include a storage unit 903 (shown in a dashed box in fig. 9), where the storage unit 903 stores a program or instructions, which when executed by the processing unit 902, enable the communication roaming device 90 to perform the communication roaming method described in the above method embodiment.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication roaming method of the above method embodiments.

The embodiment of the application also provides a computer readable storage medium, in which instructions are stored, which when executed on a computer, cause the computer to execute the communication roaming method in the method flow shown in the method embodiment.

The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a register, a hard disk, an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuit, ASIC). In the context of the present application, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

Since the communication roaming device, the computer readable storage medium and the computer program product in the embodiments of the present application may be applied to the above-mentioned method, the technical effects that can be obtained by the method may also refer to the above-mentioned method embodiments, and the embodiments of the present application are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, indirect coupling or communication connection of devices or units, electrical, mechanical, or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication roaming, characterized by a core network device applied to a first area, the method comprising:

responding to the registration information of the second standard network from the terminal equipment to the first area, and acquiring authentication data of the first standard network; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is the second area; the core network equipment of the second area supports the first system network and does not support the second system network;

Signing registration is carried out on roaming service of the second standard network based on authentication data of the first standard network, and a successful registration result of the second standard network is generated; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network;

and sending a successful registration result of the second system network to the terminal equipment.

2. The method of claim 1, wherein signing the roaming service of the second standard network based on the authentication data of the first standard network, and generating a successful registration result of the second standard network, comprises:

sending a first request message to core network equipment of the second area; the first request message is used for requesting the signed service of the terminal equipment;

receiving contracted service from core network equipment of the second area;

and if the subscribed service does not contain the roaming service of the second system network, signing to generate the roaming service of the second system network, and determining a successful registration result of the second system network.

3. The method according to claim 1 or 2, wherein before the acquiring authentication data of the first-system network in response to registration information of the second-system network from the terminal device to the first area, the method further comprises:

Receiving registration information of a first standard network from terminal equipment; the registration information of the first standard network is sent by the terminal equipment after receiving the authentication failure result of the second standard network;

responding to the registration information of the first standard network, and sending request information to core network equipment of a second area; the request information is used for requesting authentication data of the terminal equipment;

receiving authentication data from core network equipment of the second area;

signing and registering the terminal equipment in the first standard network based on the authentication data, and generating a successful registration result of the first standard network;

and sending a successful registration result of the first standard network to the terminal equipment.

4. A method according to claim 3, characterized in that before said receiving registration information for the first-system network from the terminal device, the method further comprises:

receiving registration information of the terminal equipment to a second system network;

determining a source registration area of the terminal equipment according to the operator identification information of the terminal equipment;

when the source registration area is a second area, sending request information to core network equipment of the second area through the second standard network; the request information is used for requesting authentication data of the terminal equipment;

Receiving an authentication failure result returned by the core network equipment from the second area; the authentication failure result is used for representing that the request of the core network equipment of the second area for the authentication data fails;

and returning the authentication failure result to the terminal equipment.

5. A communication roaming method, characterized by being applied to a terminal device, the terminal device being within a range of a first area; the source registration area of the terminal equipment is a second area; the method comprises the following steps:

responding to a successful registration result of a first standard network, and sending registration information of a second standard network to core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal device in the second standard network, and the registration information of the second standard network is used for indicating the core network device of the first area to acquire the authentication data of the first standard network, wherein the authentication data of the first standard network is the authentication data acquired by the core network device of the first area through the first standard network after the core network device of the first area requests the authentication data to the core network device of the second area through the second standard network;

Receiving a successful registration result in the second standard network; the successful registration result is used for indicating that the core network device of the first area successfully registers the roaming service of the second standard network based on the authentication data of the first standard network, and the successful registration result is also used for indicating that the terminal device is successfully registered in the second standard network.

6. The method of claim 5, wherein before the sending registration information for the second-system network to the core network device of the first area in response to the successful registration result for the first-system network, the method further comprises:

responding to the authentication failure result of the second system network, and sending registration information of the first system network to core network equipment of the first area; the authentication failure result is used for representing that the core network equipment of the first area requests authentication data failure from the core network equipment of the second area through the second standard network; the registration information of the first standard network is used for registering the use right of the terminal equipment in the first standard network;

and receiving a successful registration result in the first standard network.

7. The method of claim 6, wherein before the sending registration information for the first-system network to the core network device of the first area in response to the authentication failure result of the second-system network, the method further comprises:

transmitting registration information of a second system network to core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network;

and receiving the authentication failure result.

8. A communication roaming system, characterized in that the system comprises a terminal device and a core network device of a first area;

the terminal equipment is used for responding to the successful registration result of the first standard network and sending registration information of the second standard network to the core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal equipment in the second standard network;

the core network device of the first area is used for responding to the registration information of the second standard network of the first area from the terminal device and obtaining the authentication data of the first standard network; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is the second area; the core network equipment of the second area supports the first system network and does not support the second system network; signing registration is carried out on roaming service of the second standard network based on authentication data of the first standard network, and a successful registration result of the second standard network is generated; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network; sending a successful registration result of the second standard network to the terminal equipment;

The terminal device is further configured to receive a result of successful registration in the second standard network.

9. A communication roaming device, characterized in that the device comprises a communication unit and a processing unit;

the communication unit is used for acquiring authentication data of a first standard network in response to registration information of a second standard network from the terminal equipment to the first area; the authentication data of the first standard network is authentication data obtained by requesting the core network equipment of the second area from the first standard network of the first area after the core network equipment of the first area fails to request the authentication data from the core network equipment of the second area through the second standard network; the terminal equipment is in the range of the first area; the source registration area of the terminal equipment is the second area; the core network equipment of the second area supports the first system network and does not support the second system network;

the processing unit is used for signing and registering the roaming service of the second standard network based on the authentication data of the first standard network, and generating a successful registration result of the second standard network; the successful registration result is used for representing that the terminal equipment is successfully registered in the second standard network;

The communication unit is further configured to send a registration success result of the second standard network to the terminal device.

10. A communication roaming device, the device comprising a communication unit;

the communication unit is used for responding to the successful registration result of the first standard network and sending registration information of the second standard network to the core network equipment of the first area; the registration information of the second standard network is used for registering the use right of the terminal device in the second standard network, and the registration information of the second standard network is used for indicating the core network device of the first area to acquire the authentication data of the first standard network, wherein the authentication data of the first standard network is the authentication data acquired by the core network device of the first area through the first standard network after the core network device of the first area requests the authentication data to the core network device of the second area through the second standard network;

the communication unit is further configured to receive a result of successful registration in the second standard network; the successful registration result is used for indicating that the core network device of the first area successfully registers the roaming service of the second standard network based on the authentication data of the first standard network, and the successful registration result is also used for indicating that the terminal device is successfully registered in the second standard network.

11. A communication roaming device, comprising: a processor and a communication interface; the communication interface being coupled to the processor for executing a computer program or instructions to implement the communication roaming method as claimed in any of claims 1-4 or 5-7.

12. A computer readable storage medium having instructions stored therein, which when executed by a computer, perform the communication roaming method of any of claims 1-4 or claims 5-7.