WO2020001609A1

WO2020001609A1 - Network registration method, apparatus, and system

Info

Publication number: WO2020001609A1
Application number: PCT/CN2019/093644
Authority: WO
Inventors: 汪红星; 练仑; 舒续祖; 谢潜
Original assignee: 华为技术有限公司
Priority date: 2018-06-30
Filing date: 2019-06-28
Publication date: 2020-01-02
Also published as: CN110661753A; CN110661753B

Abstract

A network registration method, an apparatus, and a system, used to resolve the issue of the prior art in which a terminal device having only one SIM card cannot be connected to IMSs of multiple networks. In the present application, after a terminal device sends a registration request to an access processing network element, the access processing network element sends a first registration request to a registration processing network element in a first network; the access processing network element acquires, via a first registration response message from the registration processing network element in the first network, a public identifier of the terminal device in the first network and subscription network identifier information of the terminal device, sends a second registration request to a registration processing network element in one or more target networks, and sends to the terminal device the public identifier of the terminal device in the first network and a public identifier in the one or more target networks, such that the terminal device can be registered in the first network and in the one or more target networks, and the terminal device can communicate with terminal devices in multiple networks.

Description

Network registration method, device and system

This application claims the priority of a Chinese patent application filed on June 30, 2018 with the State Intellectual Property Office of China, with the application number 201810703784.2, and the invention name "a method, device and system for registration of a network", the entire contents of which are incorporated by reference Incorporated in this application.

Technical field

The present application relates to the field of communication technologies, and in particular, to a method, a device, and a system for registering a network.

Background technique

IP multimedia subsystem (IP multimedia subsystem, IMS) network is a network system based on a protocol (internet protocol, IP) networks for providing multimedia services, can provide a variety of multimedia services via the IMS terminal equipment, such as voice calls, Video calls, etc.

Generally, one network corresponds to one IMS. For regional networks in some campuses, such as factories, enterprises, and industrial areas, an IMS corresponding to the regional network can be set. When a terminal device enters the regional network, it can be based on the area. The IMS of the network communicates with other terminal devices in the area network, making communication within the area network more convenient.

However, based on existing technologies, a subscriber identity module (SIM) in a terminal device corresponds to an IP multimedia private identity (IMPI). For terminal devices with only one SIM card, Registered in a network, that is, an IMS that can only access one network. For example, if a terminal device has established a connection with an IMS in an area network, it cannot establish a connection with a public network IMS outside the area network.

Summary of the invention

This application provides a network registration method, device, and system, which are used to solve the problem that in the prior art, a terminal device with only one SIM card cannot establish connections with IMSs of multiple networks.

In a first aspect, an embodiment of the present application provides a method for registering a network. The method includes: first, after an access processing network element forwards a first registration request from a terminal device to a first network, First registration response information of a registration processing network element of the first network, where the first registration response information includes a public identification of the terminal device in the first network and subscription network identification information of the terminal device, wherein: The subscription network identification information includes network identifications of one or more subscription networks of the terminal device; thereafter, the access processing network element sends a second registration request to one or more target networks, where the one or Multiple target networks are determined by the subscription network identification information. After that, the access processing network element receives second registration response information from the one or more target networks, where the second registration response message includes the terminal device in the corresponding target network. Public identification, after the access processing network element receives the second registration request, the access processing network element may send third registration response information to the terminal device, where the third registration response information includes The public identity of the terminal device in the first network and the public identity of the terminal device in the one or more target networks.

With the above method, after receiving the first registration request of the terminal device, the access processing network element may complete the registration of the terminal device in the first network, or may complete the one or more targets. Registration in the network ensures that the terminal device can register to multiple networks at the same time.

In a possible design, before the access processing network element sends the third registration response information to the terminal device, it also needs to confirm that it has received the first number of each of the one or more target networks. Second registration response message.

By the above method, the access processing network element sends a second registration request to each registration processing network element in the target network, and receives a second registration response sent by the registration processing network element in each target network. The message may cause the terminal device to register with the one or more target networks, and further, may ensure that the terminal device can communicate with terminal devices in the one or more target networks.

In a possible design, when determining the one or more target networks according to the subscription network identification information, the access processing network element may further determine according to preset configuration information and the subscription network identification information. The one or more target networks, wherein the preset configuration information includes information for determining whether the access processing network element is reachable to each network, and the preset configuration information may be used to determine the Each network to which the access processing network element can forward messages.

Through the above method, the access processing network element may use a contracted network reachable from the contracted network of the terminal device as a target network, so that the network registration method in the embodiment of the present application can be applied to a plurality of terminal devices. In the network signing scenario, the application scenario is more extensive and the registration method is more flexible. When the location of the terminal device is unreachable for the subscribed network, the terminal device does not need to register with the network, which effectively avoids the delay caused by registration failure.

In a possible design, when the second registration response information further includes service routing information of the terminal device in a corresponding target network, the service routing information is used to indicate a registration processing network in the corresponding target network. Address of the access processing network element, after the access processing network element receives the second registration response information from the registration processing network element in the target network, the access processing network element may associate and store the terminal device in the corresponding Public identity and service routing information in the target network.

Through the above method, by associating and storing the public identification and service routing information of the end device in the corresponding target network, it can be ensured that when a terminal device initiates a call flow, the access processing network element can The service routing information in the target network forwards the message, further, it can ensure that the terminal device can communicate with terminal devices in multiple target networks.

In a possible design, after the access processing network element sends the third registration response information to the terminal device, the terminal device can initiate a call flow, and the specific process is as follows:

Process 1. The access processing network element receives a call request from the terminal device, and the call request includes a public identity of the terminal device in the first network; thereafter, the access processing network element may Determining service routing information of the terminal device in the first network according to the public identification of the terminal device in the first network; the access processing network element may forward the call request of the terminal device according to the service routing information .

Process 2: The access processing network element receives a call request from the terminal device, and the call request includes a public identity of the terminal device in any target network; thereafter, the access processing network element may The public identification included in the call request determines corresponding service routing information; the access processing network element may forward the call request of the terminal device according to the corresponding service routing information.

By the above method, the access processing network element forwards the call request through the previously saved public identity and corresponding service routing information, so that the terminal device can initiate a call request to the corresponding network, so that the terminal device can Communicating with a terminal device in the corresponding network.

In a possible design, the first registration response information, the second registration response information, and the third registration response information are all 200 OK messages.

With the above method, the first registration response information, the second registration response information, and the third registration response information are 200 OK messages in the existing registration process, which can save signaling resources, and make the registration method more efficient.

In a second aspect, an embodiment of the present application provides a network registration method. The method includes: First, after a registration processing network element in the first network passes authentication of the terminal device according to a registration request from the terminal device, Sending a first message to a first server, where the first message is used to request subscription information of the terminal device, the first message includes a private identity of the terminal device; and thereafter, the registration process in the first network is performed The network element receives a second message from the first server, where the second message includes contract information of the terminal device, and the contract information includes a public identifier of the terminal device in the first network and the The subscription network identification information of the terminal device; after receiving the second message, the registration processing network element in the first network sends first registration response information to the access processing network element, and the first registration response information includes The public identification of the terminal device in the first network and the subscription network identification information of the terminal device.

By the above method, after receiving the registration request from the terminal device, the registration processing network element in the first network can complete the registration of the terminal device in the first network, or obtain the terminal device from the first server. The contracted network identification information of the terminal device is described, and furthermore, the terminal device can be registered with other networks, and further, the terminal device can be registered with the first network and other networks at the same time.

According to a third aspect, an embodiment of the present application provides a network registration method. The method includes: first, a first server receives a first message from a registration processing network element in the first network, where the first message is used for Requesting contract information of a terminal device, the first message includes a private identifier of the terminal device; after that, the first server may determine the contract information of the terminal device according to the private identifier of the terminal device, and the contract The information includes the public identification of the terminal device in the first network and the contracted network identification information of the terminal device; after the contracted information is determined, the first server registers with the registration processing network element in the first network. Send a second message, where the second message includes subscription information of the terminal device.

With the above method, after receiving the first message from the registration processing network element in the first network, the first server feeds back the public identification of the terminal device in the first network and the contracted network identification of the terminal device. The information can ensure that the terminal device is registered in the first network and other networks.

In a possible design, before the first server determines the subscription information of the terminal device according to the private identifier of the terminal device, the first server obtains the subscription network identification information of the terminal device. Specifically, The first server may obtain subscription network identification information from a server in a subscription network of the terminal device.

With the above method, the first server can obtain the subscription network identification information of the terminal device before the terminal device is registered, so that the terminal device can also register to other networks while registering with the first network in.

According to a fourth aspect, an embodiment of the present application provides a method for registering a network. The method includes: the terminal device sends a registration request to an access processing network element; and then, the terminal device receives a request from the access processing network. Meta registration response information, wherein the registration response information includes the public identification of the terminal device in the first network and the public identification of the terminal device in one or more target networks.

By the above method, the terminal device can receive the public identification of the terminal device in the first network and the public identification of the terminal device in one or more target networks by sending a registration request, that is, completion The registration on the first network and the one or more target networks enables the terminal device to register to multiple networks at the same time.

In a possible design, after the terminal device receives the registration response information from the access processing network element, the terminal device may initiate a call flow. The specific process is as follows: the terminal device first receives a network selection command, Wherein, the network selection command is used to determine the network to which the call requests access; thereafter, the terminal device, according to the network selection command, from the public identification of the terminal device in the first network and the terminal device in one or One public identifier is selected from the public identifiers in multiple target networks; after that, the terminal device sends a call request to the access processing network element, and the call request includes the public identifier selected by the terminal device.

By the above method, after the terminal device is registered to the first network and the one or more target networks, the terminal device may initiate a call flow to the first network or any target network, so that the terminal The device may communicate with a terminal device in the first network or any target network.

In a fifth aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to an access processing network element. For a beneficial effect, reference may be made to the description of the first aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the first aspect described above. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a receiving unit and a sending unit, and may further include a processing unit, and these units may perform corresponding functions in the method example of the first aspect described above. For details, refer to the detailed description in the method example. I won't go into details here.

In a sixth aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to a registration processing network element in the first network. For a beneficial effect, reference may be made to the description of the second aspect and is not repeated here. The device has the function of implementing the behavior in the method example of the second aspect described above. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a receiving unit, a sending unit, and a processing unit. These units can perform the corresponding functions in the method example of the second aspect described above. For details, refer to the detailed description in the method example. To repeat.

In a seventh aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to a first server. For a beneficial effect, reference may be made to the description in the third aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the third aspect described above. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a processing unit and a transceiver unit, and these units can perform corresponding functions in the method example of the third aspect described above. For details, refer to the detailed description in the method example, and details are not described herein.

In an eighth aspect, an embodiment of the present application further provides a communication device, which is applied to a terminal device. For a beneficial effect, refer to the description of the fourth aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the fourth aspect described above. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a sending unit and a receiving unit, and may further include a processing unit, and these units may perform corresponding functions in the method example of the fourth aspect described above. For details, refer to the detailed description in the method example. I won't go into details here.

In a ninth aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to an access processing network element. For a beneficial effect, reference may be made to the description of the first aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to execute a corresponding function in the method of the first aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device. The structure of the communication device further includes a communication interface for communicating with other devices.

In a tenth aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to a registration processing network element in a first network. For a beneficial effect, refer to the description of the second aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to execute a corresponding function in the method of the second aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device. The structure of the communication device further includes a communication interface for communicating with other devices.

According to an eleventh aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to a first server. For a beneficial effect, reference may be made to the description of the third aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to execute a corresponding function in the method of the third aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device. The structure of the communication device further includes a communication interface for communicating with other devices.

In a twelfth aspect, an embodiment of the present application further provides a communication device, where the communication device is applied to a terminal device. For a beneficial effect, reference may be made to the description of the fourth aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to execute a corresponding function in the method of the fourth aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device. The communication device further includes a transceiver in its structure for communicating with other devices.

In a thirteenth aspect, an embodiment of the present application further provides a communication system. For beneficial effects, refer to the descriptions of the previous aspects. Details are not described herein again. The communication system includes an access processing network element and registration in the first network. Processing network element

The access processing network element is configured to forward a first registration request from a terminal device to a registration processing network element in the first network; and receive a registration processing network element from the first network. First registration response information, the first registration response information including a public identification of the terminal device in the first network and subscription network identification information of the terminal device, wherein the subscription network identification information includes the Network identification of one or more subscribed networks of the terminal device;

A registration processing network element in the first network, configured to authenticate the terminal device according to a first registration request from the terminal device, and send the first registration response to the access processing network element information.

In a possible design, the communication system may further include a first server; the registration processing network element in the first network may further authenticate the terminal device according to a first registration request from the terminal device. After the right is passed, a first message is sent to the first server, the first message is used to request the contract information of the terminal device, and the first message includes the private identity of the terminal device; the first server first Receiving the first message from a registration processing network element in the first network, and then the first server determines subscription information of the terminal device according to a private identifier of the terminal device, where the contract information includes all The public identification of the terminal device in the first network and the contracted network identification information of the terminal device, and then the first server may send a second message to a registration processing network element in the first network, the The second message includes the contract information of the terminal device; the registration processing network element in the first network may receive the second message from the first server

In a possible design, the communication system further includes at least one registration processing network element in the target network; after the access processing network element receives the first registration response message, the access processing network element A second registration request may be sent to a registration processing network element in the at least one target network, where the at least one target network is determined by the subscription network identification information; the registration processing network in the at least one target network The Yuanhui receives the second registration request from the access processing network element, where the second registration request may include a private identity of the terminal device; and thereafter, for a registration processing network element in any target network, The registration processing network element in the target network obtains the contract information of the terminal device in the target network from a second server in the target network, and the contract information of the terminal device in the target network includes the contract information. The public identity of the terminal device in the target network; after that, the second registration response information is sent to the access processing network element, and the second registration should be The answer message includes the public identity of the terminal device in the target network; the access processing network element receives second registration response information from the registration processing network element in the at least one target network.

In a possible design, the communication system may further include a terminal device; the terminal device may send a first registration request to the access processing network element, and the first registration request may include the terminal device in the The private identification in the first network; after that, the access processing network element receives a first registration request from the terminal device, and the access processing network element receives the first registration request from the first network; In the case of the first registration response message of the registration processing network element and the second registration response message of the registration processing network element in the at least one target network, the access processing network element may send a third registration to the terminal device Response information, wherein the third registration response information includes a public identity of the terminal device in the first network and a public identity of the terminal device in the at least one target network, and then the terminal device Receiving third registration response information from the access processing network element.

In a fourteenth aspect, the present application also provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on the computer, causes the computer to execute the methods described in the above aspects.

In a fifteenth aspect, the present application also provides a computer program product containing instructions that, when run on a computer, causes the computer to execute the methods described in the above aspects.

In a sixteenth aspect, the present application also provides a computer chip, the chip is connected to a memory, and the chip is configured to read and execute a software program stored in the memory, and execute the methods described in the foregoing aspects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an IMS architecture; FIG.

FIG. 2 is a schematic architecture diagram of a network system provided by the present application; FIG.

FIG. 3 is a schematic architecture diagram of another network system provided by the present application; FIG.

4 is a schematic diagram of a network registration method provided by the present application;

5 is a flowchart of a network registration method provided by the present application;

6 to 11 are schematic structural diagrams of a communication device provided by the present application.

detailed description

In order to make the purpose, technical solution, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

Figure 1 is a schematic diagram of the IMS network framework, including: terminal equipment, proxy-call session control function (P-CSCF) network element, serving-call session control function (S-CSCF) ) Network element, home subscriber server (HSS), and application server (AS).

The terminal device is configured to generate a registration request and send the generated registration request to a P-CSCF network element in the IMS; and receive registration response information returned from the IMS system.

The P-CSCF network element is the first connection point of the access network to the IMS, and is the first contact point of the terminal equipment in the IMS. The role of the P-CSCF network element in the IMS system is similar to performing a proxy service All information, whether from the terminal device or sent to the terminal device, must be forwarded through the P-CSCF network element. The P-CSCF network element is responsible for verifying the request in the IMS, and forwards the verified request to the specified destination, and processes and forwards the response information. The IMS of different networks may have the same P-CSCF network element.

Specifically, the P-CSCF network element is configured to forward registration request and response information from the terminal device to the S-CSCF network element; and forward the registration request and response information to the terminal device.

The S-CSCF network element is a control core of the IMS, and provides session control and registration for a terminal device. The S-CSCF network element is used to receive the registration request of the terminal device forwarded by the P-CSCF network element; authenticate the terminal device; and after determining that the authentication is successful, obtain the terminal from the HSS through the CX interface of the Diameter protocol Device contract information, where the contract information includes the IMPU of the terminal device in the network; the S-CSCF network element is also used to connect to each application server based on the ISC interface, and the S-CSCF network element is also used to trigger the application server to execute Operation to route the request message of the terminal device to the corresponding application server.

The HSS is the main data storage that stores all user and service related data in the IMS. The data stored in the HSS mainly includes user identity, subscription information, access parameters, and so on.

The AS: is located in a user's home network or a third-party location. The third-party location refers to a network or an independent application server. The main functions of the AS include: processing a request message sent from the S-CSCF network element; and sending the processed request message to the S-CSCF network element.

Although not shown, the IMS may further include an interrogating-call session control function (I-CSCF) network element, and the I-CSCF network element may be connected to the S-CSCF network element and The P-CSCF network element is used to provide a user with an entrance to a home network; when a terminal device roams to another network, a message is sent to the P-CSCF network element, and the P-CSCF network element may send a message from the terminal The message of the device is forwarded to the I-CSCF network element, and the message from the terminal device is sent to the S-CSCF network element through the I-CSCF network element; specifically, the I-CSCF network element needs to pass through the IMS The HSS queries the corresponding S-CSCF network element, and then forwards the message from the terminal device to the corresponding S-CSCF network element.

The terminal equipment in this application, also known as user equipment (UE), can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as a ship, etc.); it can also be Deployed in the air (such as aircraft, balloons, satellites, etc.). The terminal device may be a mobile phone, a tablet, a computer with a wireless transmitting and receiving function, a virtual reality (VR) device, an augmented reality (AR) device, an industrial control (industrial control) ), Wireless devices in self-driving, wireless devices in remote medical, wireless devices in smart grid, wireless devices in transportation safety , Wireless devices in smart cities, wireless devices in smart homes, and so on.

Based on the network framework shown in FIG. 1, the process of registering the terminal device to the first network is as follows:

After the terminal device initiates a registration request to the IMS system of the first network, the P-CSCF network element receives a registration request from the terminal device that carries the IMPI of the terminal device, and the P-CSCF network element The registration request is forwarded to the S-CSCF network element, and the S-CSCF network element performs authentication. After the authentication is passed, a server allocation request (server assignment request, SAR) is sent to the HSS in the first network. ) Message, after receiving the SAR message, the HSS in the first network feeds back an SAA message to the S-CSCF network element, and the server assignment response (SAA) message includes the terminal The contract information of the device, for example, the IP multimedia public identity (IMPU) of the terminal device in the first network, and the S-CSCF network element obtains the terminal device after receiving the SAA message. The IMPU in the first network sends a 200OK message to the P-CSCF network element, and the 200OK message includes the IMPU of the terminal device in the first network and the service of the terminal device in the first network. Routing route) information, the service routing information carries information used to indicate the address of the S-CSCF network element in the first network, so that the P-CSCF network element receives the After an IMPU call request in the network, the call request is forwarded to the S-CSCF network element according to the service routing information that has been saved. After receiving the 200OK message, the P-CSCF network element deletes the service routing information in the 200OK message, and sends the 200OK message with the service routing information deleted to the terminal device. So far, the terminal device has registered with the first network and established a connection with the IMS of the first network.

After receiving the 200OK message, the terminal device may initiate a call request based on the IMPU of the terminal device in the first network included in the 200OK message, and establish a connection with a network element in the IMS of the first network, and Other terminal devices in the first network communicate; but in the case where the terminal device has been registered in the first network, that is, in the case where a connection has been established with the IMS of the first network, the terminal The device cannot register to other networks, which means that it cannot establish a connection with the IMS of other networks, making it impossible to communicate with terminal devices in other networks.

For this reason, the embodiment of the present application provides a network registration method, which is used to solve the problem that terminal devices cannot establish connections with IMSs of multiple networks in the prior art.

FIG. 2 is a schematic structural diagram of a network system applied in an embodiment of the present application, including: a terminal device, an access processing network element, a registration processing network element in a first network, a first server, and a target network. Registration processing network element. Optionally, the network system may further include a second server. In the embodiments of the present application, the number of target networks is not limited. That is, the terminal device may be registered to one target network or multiple terminals. The target network, correspondingly, the network system may include a registration processing network element and a second server in each target network.

It should be understood that in the description of this application, the words "first", "second", and "third" are used only for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be It is understood to indicate or imply a sequence; in the embodiments of the present application, multiple means two or more than two; in the embodiments of the present application, the network attributes of the first network and the target network are not limited, for example, the first network It may be a public network, and the second network may be an area network; for example, the first network and the second network may both be area networks.

It should be noted that the public network may be a network owned by an operator, and the regional network may refer to a network owned by some specific users, such as a community network, a campus network, and the like.

The terminal device may send a registration request to a registration processing network element in the first network (in the embodiment of the present application, the registration request sent by the terminal device is a first registration request), and may also send a registration request from the terminal device. The registration processing network element in the first network receives a registration response message (in the embodiment of the present application, the registration response message received by the terminal device from the registration processing network element in the first network is a third registration response message), The registration response message received from the registration processing network element in the first network may include a public identifier of the terminal device in the first network, and may further include one or more of the terminal device in the first network. Public identifiers in the target network; based on the plurality of public identifiers included in the registration response message received from the registration processing network element in the first network, the terminal device may initiate a call flow.

The access processing network element is a first contact point between the terminal device and the first network or the target network, and the access processing network element may send a registration request (for example, a first registration request) from the terminal device. ) Is forwarded to the registration processing network element in the first network or the target network, and the registration request from the terminal device includes the private identification of the terminal device, or the subscription network identification information of the terminal device may be received In the case of sending a second registration request carrying the private identification of the terminal device to the registration processing network element in the target network; or a third registration response message may be sent to the terminal device.

Optionally, the access processing network element may be a P-CSCF network element in the IMS system.

The private identifier of the terminal device is an identifier that is used to identify the terminal device and is private to the terminal device and invisible to other terminal devices. The number of private identifiers of the terminal device is not limited in this application. This application does not limit the type of the private identification of the terminal device. For example, the private identification of the terminal device may be IMPI or other identifications.

The registration processing network element (for example, the registration processing network element in the first network or the registration processing network element in the target network) is a network element that provides session control and registration services for the terminal device in the network and can receive data from The registration request of the terminal device may also authenticate the terminal device according to the registration request from the terminal device, and obtain the contract information of the terminal device through a server in the network after the authentication is passed. The subscription information includes a public identity of the terminal device in the network, and then sends a registration response message (for example, a first registration response message or a second registration response message) carrying the subscription information to the access processing network element.

The public identification of the terminal device in a network is information used to identify the terminal device in the network, and is an identification that is visible to other terminal devices. For example, the public identification of the terminal device in the network may be Characterizing the identity information of the terminal device in the network, a terminal device may have multiple different public identities in the network for characterizing different identity information. This application does not limit the type of the public identity of the terminal device in the network. For example, the public identity may be IMPU or other identity, which is not limited in this application.

It should be noted that, in the embodiment of the present application, the registration processing network element in the first network may be configured as a registration processing network element that needs to authenticate the terminal device, and the registration processing network in the target network The element may be configured as a registration processing network element that needs to authenticate the terminal device. The above configuration mode is only an example, and in fact, the registration processing network element in each network (for example, the first network or the target network) can be configured according to the scenario.

The registration processing network element in the first network or the target network may be an S-CSCF network element in the IMS, for example, the registration processing network element in the first network is an S-CSCF network element in the first network; The registration processing network element in the target network is an S-CSCF network element in the target network.

The first server is a data storage for storing contract information and service-related data of the terminal device in the first network; the second server is used for storing contract data and service-related data of the terminal device in the target network Data storage.

The first server or the second server may be an HSS, for example, the first server is a first HSS, and the second server is a second HSS.

In the embodiment of the application, after the terminal device sends a first registration request to the access processing network element, the access processing network element sends the first registration request to the registration processing network element in the first network. A registration request, and then, by receiving a first registration response message from a registration processing network element in the first network, obtaining a public identification of the terminal device in the first network and contracted network identification information of the terminal device, and Sending a second registration request to the registration processing network element in the one or more target networks, and then obtaining the second registration response message through the second registration response message received from the registration processing network element in the one or more target networks. The public identification of the terminal device in the one or more target networks, and then the access processing network sends to the terminal device the information that the terminal device can be in the first network and the one or more target networks. The third registration response message of the public identity enables the terminal device to register to the first network and the one or more target networks at the same time. A terminal device with a plurality of communication devices in the network.

FIG. 3 is a schematic diagram of another network system applicable to the embodiment of the present application, including a UE, a P-CSCF network element, an S-CSCF network element in a first network, a first HSS, and a target network in the target network. S-CSCF network element, the network system may further include a second HSS, wherein the P-CSCF network element corresponds to the access processing network element shown in FIG. 2, and the S in the first network -The CSCF network element corresponds to the registration processing network element in the first network as shown in FIG. 2, and the S-CSCF network element in the target network corresponds to the registration processing network in the target network as shown in FIG. 2 Element, the first HSS corresponds to the first server shown in FIG. 2, and the second HSS corresponds to the second server shown in FIG. 2, and functions of each network element shown in FIG. 3 Please refer to the related descriptions shown in Figs. 1-2, which will not be repeated here.

It should be understood that, in FIG. 3, although only the S-CSCF network element and the second HSS in one target network are shown, the network system shown in FIG. 3 may include S-s in multiple target networks. The number of CSCF network elements and the second HSS is not limited in the embodiments of the present application.

The following uses the network framework shown in FIG. 3 as an example to introduce the network registration method provided in the embodiment of the present application. In fact, the embodiment of the present application can also be applied to the network system shown in FIG. Here, the network system shown in FIG. 3 is used as an example for illustration.

As shown in FIG. 4, a method for registering a network is provided in an embodiment of the application.

S401: The UE sends a first registration request to the P-CSCF network element.

S402: After receiving the first registration request, the P-CSCF network element forwards the first registration request to an S-CSCF network element in the first network.

S403: The S-CSCF network element in the first network authenticates the UE according to a first registration request from the UE, and sends a first message to the first HSS after the authentication is passed. A message is used to request subscription information of the UE, and the first message includes the IMPI of the UE.

The first registration request includes the IMPI of the UE and related authentication information. The IMPI of the UE is a private identifier of the UE and is used to identify the UE. One UE may have one IMPI or multiple IMPIs. IMPI. In the embodiment of the present application, an IMPI of the UE is used as an example for description. The IMPI of the UE may enable the P-CSCF network element to receive the first registration request and A registration request is sent to the corresponding first network. For example, the first registration request message may be sent to an I-CSCF network element in the first network, and then the first registration request is sent by the I-CSCF. Forwarded to the S-CSCF network element in the first network, and after the S-CSCF network element in the first network authenticates the UE, the IMPI of the UE may be carried in the first network A message is sent to the first HSS, and the subscription information of the UE is obtained from the first HSS. For example, the first message may be a SAR message.

S404: The first HSS receives a first message from an S-CSCF network element in the first network, and determines subscription information of the UE according to the IMPI of the UE. The subscription information includes the UE in the first The IMPU in the network and the subscription network identification information of the UE.

The first HSS stores the IMPU of the UE in the first network and the subscription network identification information of the UE; the IMPU of the UE in the first network is the UE's in the first network. The public identity is visible to network elements in the first network IMS and other UEs in the first network. Based on the IMPU of the UE in the first network, the UE can communicate with the IMS of the first network The network element in the network establishes a connection and communicates with other UEs in the first network. This application does not limit the number of IMPUs of the UE in the first network.

The subscription network identification information of the UE is used to identify identification information of the UE subscription network, and includes network identifications of one or more subscription networks, and the identification information may be network domain name information or network identification information. (identification, ID), any information that can identify the network is applicable to the embodiments of this application.

The UE subscription network identification information may indicate one or more of the UE subscription networks. Before the first HSS determines subscription information of the UE according to the IMPI of the UE, the first HSS needs to obtain subscription network identification information of the UE.

Specifically, the first HSS may obtain the subscription network identification information of the UE from the HSS in the subscription network.

When the UE signs a contract with a network, the network is a contracted network, and the HSS in the contracted network can save the UE's contracted information in the contracted network, and the contracted information includes the UE's IMPI and all The IMPU of the UE in the contracted network, the IMPI of the UE and the IMPU of the UE in the contracted network have a corresponding relationship, and the HSS in the contracted network may subscribe the contract to the first HSS. The network identification of the network is sent to the first HSS as the subscription network identification information of the UE; when the UE is contracted with multiple networks, it corresponds to multiple subscription networks, and the HSS in each subscription network stores the UE IMPI and IMPU of the UE in the contracted network, and send the network identification of the contracted network to the first HSS; the first HSS will receive the network identifications of multiple contracted networks, and The subscription network identification information is stored as the subscription network identification information of the UE.

It should be noted that, in the above example, the HSS in the contracted network actively sends the subscription network identification information of the UE to the first HSS as an example. The HSS in the contracted network sends the UE The manner of subscribing to the network identification information is not limited in the embodiments of the present application, and any manner that can send the subscription network identification information of the UE to the first HSS is applicable to the embodiments of the present application. In fact, there are many ways for the first HSS to obtain the subscription network identification information of the UE, and it is not limited to the HSS in the subscription network actively sending the subscription network identification of the UE to the first HSS. Information, for example, the first HSS may send a request message to HSSs in other networks to determine the subscription network of the UE, and request to obtain the subscription network identification information of the UE, and then the subscription of the UE The HSS in the network then sends the subscription network identification information of the UE to the first HSS.

S405: The first HSS sends a second message to an S-CSCF network element in the first network, where the second message includes subscription information of the UE. For example, the second message may be SAA message.

S406: The S-CSCF network element in the first network receives a second message from the first HSS, and thereafter, the S-CSCF network element in the first network sends a first message to the P-CSCF network element. A registration response message, where the first registration response message includes IMPU of the UE in the first network and subscription network identification information of the UE.

After receiving the second message from the first HSS, the S-CSCF network element in the first network obtains the IMPU of the UE in the first network and the subscription network identification information of the UE, The IMPU of the UE in the first network and the subscription network identification information of the UE are carried in the first registration response information, and then the first registration response message is sent to the P-CSCF network element, where the first There are many forms of a registration response message. For example, the first registration response message may be a 200 OK message, which is not limited in the embodiment of the present application.

The first registration response information further includes service routing information of the UE in the first network, and the service routing information is used to indicate an address of an S-CSCF network element in the first network.

The service routing information of the UE in the first network is used for the P-CSCF network element to determine an S-CSCF network element to which the information needs to be forwarded when the information is forwarded. The service routing information may indicate an address of an S-CSCF network element in the first network. When there are multiple S-CSCF network elements in the first network, a service route of the UE in the first network The information may indicate addresses of multiple S-CSCF network elements in the first network, and when the service routing information of the UE in the first network indicates multiple S-CSCF network elements in the first network When the P-CSCF network element forwards the information, it only needs to forward the information to any one of the S-CSCF network elements indicated.

Specifically, there are many ways for the service routing information of the UE in the first network to indicate the address of the S-CSCF network element in the first network. For example, the UE is in the first network. The service routing information may be directly displayed as the address of the S-CSCF network element in the first network, or may be interface information pointing to the S-CSCF network element in the first network, etc. The above manner is only an example. Any method that can indicate the address of the S-CSCF network element in the first network is applicable to the embodiments of the present application. This application does not limit the form of the service routing information of the UE in the first network. For example, the service routing information may be carried in the service-route header field, or other methods may be adopted.

S407: The P-CSCF network element receives first registration response information from the S-CSCF network element in the first network, and the P-CSCF network element sends the S-CSCF network element to one or more target networks. The meta sends a second registration request, wherein the one or more target networks are determined by the subscription network identification information.

After receiving the first registration response information from the S-CSCF network element in the first network, the P-CSCF network element obtains the subscription network identification information of the UE.

The P-CSCF network element stores preset configuration information, and the preset configuration information includes information used to determine whether the P-CSCF network element is reachable to each network. For example, the preset configuration information may include information about the next hop of the P-CSCF network element to each network (for example, the method of configuring the domain name to indicate the next step of the P-CSCF network element to each network) Hop information), for a subscription network of the UE, if the preset configuration information includes information from the P-CSCF network element to the next hop of the subscription network, it indicates that the subscription network is the subscription network The network that the P-CSCF network element can reach, otherwise it is unreachable. The above information used to determine whether the P-CSCF network element is reachable to each network is only an example, and it should be understood that it is used to determine the P -There are many types of information about whether the CSCF network element is reachable to various networks. This application is not limited. Any information that can be used to determine whether the P-CSCF network element is reachable to each network is applicable to the implementation of this application. example.

When the P-CSCF network element determines the one or more target networks, based on the preset configuration information, according to the contracted network identification information, the The network reachable by the P-CSCF network element is the target network, and the determined number of target networks may be one or multiple; if one of the P-CSCF networks exists in the contracted network indicated by the contracted network identification information Element reachable network, the network reachable by the one P-CSCF network element is the target network, and if there are multiple P-CSCF network elements in the contracted network indicated by the contracted network identification information, Reachable network, the network reachable by each of the P-CSCF network elements is a target network. In this case, there are multiple target networks; in another possible implementation manner, the subscription network identification information indicates There are multiple networks reachable by the P-CSCF network elements in the contracted network, and a part of the network may be determined as the target network from the networks reachable by the multiple P-CSCF network elements. The above manner is merely illustrative. In specific implementation, the target network and the corresponding number of target networks may be determined according to a specific scenario, which is not limited in this application.

It should be noted that the preset configuration information is stored in the P-CSCF network element in advance, and the preset configuration information can be updated in real time. The specific storage method and update method in the embodiment of this application It is not limited; due to the different geographic locations and network attributes of each network, the P-CSCF network element may only be routed to some specific networks, and the preset configuration information may only include the information for determining the P- Information about whether the CSCF network element is reachable to some networks.

After the one or more target networks are determined from the subscribed networks indicated by the subscribed network identification information, the P-CSCF network element sends a first to the S-CSCF network elements in the one or more target networks. Second registration request, that is, the P-CSCF network element sends a second registration request to the S-CSCF network element in each target network. The second registration request includes an IMPI of the UE.

For each target network, the S-CSCF network element in the target network may or may not perform authentication on the UE after receiving the second registration request. Whether authentication is required in the network is not limited in the embodiment of the present application. The S-CSCF network element in the target network may set an authentication operation for the UE according to a specific scenario.

After that, the S-CSCF network element in the target network sends a first message carrying the UE's IMPI to a second HSS in the target network to obtain subscription information of the UE in the target network. After receiving the first message, the second HSS determines the subscription information of the UE in the target network according to the IMPI of the UE, and feeds back the second message to the S-CSCF network element in the target network. The subscription information of the UE in the target network includes the IMPU of the UE in the target network. For example, the first message may be a SAR message, and the second message is a SAA message.

After receiving the second message from the second HSS, the S-CSCF network element in the target network sends second registration response information to the P-CSCF network element, and the second registration response message includes the UE. IMPU in the target network.

Optionally, there are many forms of the second registration response message, for example, the second registration response message may be a 200 OK message, which is not limited in this application.

S408: The P-CSCF network element receives second registration response information from the S-CSCF network element in the one or more target networks, and the second registration response message includes the UE in the corresponding target network. IMPU.

In a possible implementation manner, the second registration response message further includes service routing information of the UE in a corresponding target network. After receiving the second registration response message, the P-CSCF network element stores the IMPU and service routing information of the UE in the corresponding target network in association. The service routing information is used to indicate an address of an S-CSCF network element in a corresponding target network.

For the S-CSCF network element in any one of the one or more target networks, the P-CSCF network element receives second registration response information from the S-CSCF network element in the target network, The second registration response information may include service routing information of the terminal device in the target network, where the service routing information is used to indicate an address of an S-CSCF network element in the target network, where the UE The service routing information in the target network is used to enable the P-CSCF network element to determine the S-CSCF network element to which the information needs to be forwarded when the information is forwarded, and the service routing information of the UE in the target network may indicate the target. The address of the S-CSCF network element in the network. When there are multiple S-CSCF network elements in the target network, the service routing information of the UE in the target network may indicate multiple of the target network. The address of the S-CSCF network element. When the service routing information of the UE in the target network can indicate the addresses of multiple S-CSCF network elements in the target network, when the P-CSCF network element forwards the information, Just forward the information to the multiple S-CSCFs indicated Any of a S-CSCF in the network element to element.

The manner in which the service routing information of the UE in the target network indicates the address of the S-CSCF network element in the target network, and the manner in which the service routing information of the UE in the first network indicates the first The address of the S-CSCF network element in the network is similar. For details, refer to the related description of the service routing information of the UE in the first network, and details are not described herein again.

This application does not limit the form of the service routing information of the UE in the target network. For example, the service routing information may be carried in the service-route header field, or other methods may be adopted.

Optionally, in a case where the second registration response message includes service routing information of the UE in the target network, the P-CSCF network element stores the IMPU and UE of the UE in the target network. After the UE has service routing information in the target network, it may delete the second registration response message.

After the P-CSCF network element receives the second registration response information from the one or more target networks, the P-CSCF network element obtains the corresponding The IMPU in the target network adds the IMPU of the UE in the one or more target networks to the first registration response information, and adds the UE's presence in the one or more target networks. The first registration response information of the IMPU is sent to the UE as third registration response information. The P-CSCF network element may also obtain the IMPU of the UE in the corresponding target network in each of the second registration response messages and the UE in the first registration response message in the first registration response message. After the IMPU in the network, the IMPU of the UE in the one or more target networks and the IMPU of the UE in the first network are carried in the third registration response information to the UE Sending the third registration response information.

Optionally, there are many forms of the third registration response message. For example, the third registration response message may be a 200 OK message, which is not limited in this application.

S409: The P-CSCF network element sends third registration response information to the UE, where the third registration response information includes the IMPU of the UE in the first network and the UE in the one or IMPUs in multiple target networks.

The IMPU of the UE in the one or more target networks included in the third registration response information may be an IMPU sent by an S-CSCF network element in each of the target networks.

Specifically, before the P-CSCF network element sends third registration response information to the UE, the P-CSCF network element may determine that each of the one or more target networks has been received in each of the target networks. The second registration response information of the S-CSCF network element.

After the UE determines that the registration is successful after receiving the third registration response information, if the UE receives a network selection command, wherein the network selection command is used to determine a network to which the call requests access; thereafter, According to the network selection command, the UE may select an IMPU from the IMPU of the UE in the first network and the IMPU of the UE in the one or more target networks to initiate a call flow, for example, When a user needs to communicate with a UE in the first network, he can send instructions to the UE, such as sending instructions by dialing, shortcut keys, etc., and the UE will receive a network selection command; in this case, all The network selection command is used to determine that the network requested by the call is the first network, and the UE selects an IMPU in the first network to initiate a call process according to the network selection command; when a user needs to communicate with a target network When the UE in communication communicates, it can send instructions to the UE, such as sending instructions by dialing, shortcut keys, etc., and the UE will receive a network selection command; in this case, the network selection The command is used to determine that the network requested by the call is the target network, and the UE selects an IMPU of the UE in the target network to initiate a call process according to the network selection command; that is, the UE sends a call process to the target network. The P-CSCF network element sends a call request, and the call request includes an IMPU selected by the UE.

Accordingly, the following two situations exist:

Case 1: The UE may send a call request to the P-CSCF network element, and the call request includes an IMPU of the UE in the first network;

Determining, by the P-CSCF network element, the service routing information of the UE in the first network according to the IMPU of the UE in the first network; thereafter, according to the UE's in the first network The service routing information forwards the call request to an S-CSCF network element in the first network.

Case 2: The UE may send a call request to the P-CSCF network element, and the call request includes an IMPU of the UE in any target network;

The P-CSCF network element determines corresponding service routing information according to the IMPU included in the call request; and thereafter, forwards the call request to the corresponding target network S-CSCF network element according to the corresponding service routing information. .

In the following, the network registration method shown in FIG. 4 is applied to a specific scenario, and the network registration method provided in the embodiment of the present application is further described.

As shown in FIG. 5, a method for registering a network according to an embodiment of the present application, wherein the first network is a public network, the target network is an area network, and the identification information of the contracted network of the terminal device is Domain name information for the local area network.

S501: The UE signs a contract with a regional network, and the second HSS stores contract information, where the contract information includes the IMPI of the UE and the IMPU of the UE in the regional network.

When obtaining the IMPI of the UE by the second HSS, the IMPI of the UE may be obtained from the first HSS of the public network in the regional network based on the IMPU of the UE in the regional network.

S502: The second HSS registers the domain name information of the regional network in the first HSS of the public network.

Specifically, there are many ways for the second HSS to register the domain name information of the local area network. For example, the domain name information of the local area network may be sent to the first HSS through an interface. Sending the domain name information of the regional network to the first HSS. The above method is only an example. Any method that can register the domain name information of the regional network in the first HSS of the public network is applicable to this application. Examples.

There are also many ways for the first HSS to save the domain name information of the regional network. For example, the first HSS may add an extended domain name list after the UE ’s IMPI, and save the domain name information of the regional network in the area network. In the extended domain name list, a mapping relationship may also be set to establish a mapping relationship between the IMPI of the UE and the domain name information of the regional network.

S503: The UE sends a registration request carrying the IMPI of the UE to the P-CSCF network element, and the S-CSCF network element in the public network authenticates the UE. After the authentication is passed, Sending a SAR message to the first HSS to obtain subscription information of the UE.

S504: The first HSS sends an SAA message to an S-CSCF network element in the public network, which carries the subscription information of the UE.

The subscription information of the UE includes the IMPU of the UE in the public network. If the domain name information of the UE's area network is stored in the first HSS, the domain name information of the area network is carried in the SAA message. Sending to the S-CSCF network element in the public network.

S505: After receiving the SAA message, the S-CSCF network element in the public network sends a first 200OK message of successful registration to the P-CSCF network element, and the first 200OK message includes the UE in the An IMPU in the public network and a corresponding service-route header field, where the service-route header field carries service routing information of the UE in the public network, and the service routing information is used to indicate the public network The address of the S-CSCF network element in the network; if the SAA message includes the domain name information of the regional network, the first 200OK message carries the domain name information of the regional network.

S506: After the P-CSCF network element receives the first 200OK message, if the first 200OK message includes the domain name information of the regional network, the domain name information of the regional network needs to be saved; after that, the The domain name information of the local area network in the first 200OK message is deleted.

For the area network indicated in the domain name information of the area network, the P-CSCF network element initiates a registration process to the IMS in each indicated area network one by one, that is, sends to the S-CSCF network element in each area network. A second registration request, where the second registration request includes an IMPI of the UE.

For one of the area networks, when the P-CSCF network element sends the second registration request to the S-CSCF network element in the area network, in fact, it can use the I-CSCF network element in the area network to send the second registration request. The second registration request is sent to an S-CSCF network element in the area network. Specifically, the P-CSCF network element sends the second registration request to an I-CSCF network element in the area network. The I-CSCF network element in the network sends a request message to the second HSS in the area network, for obtaining the address of the S-CSCF network element in the area network from the second HSS, and the I- in the area network After the CSCF network element obtains the address of the S-CSCF network element in the area network, the CSCF network element sends the second registration request to the S-CSCF network element in the area network according to the address of the S-CSCF network element in the area network. .

S507: After the S-CSCF network element in the area network receives the second registration request, the S-CSCF network element in the area network may not authenticate the UE and communicate with the second HSS of the area network. Obtaining the subscription information of the UE in the area network interactively, for example, an S-CSCF network element in the area network sends a SAR message to the second HSS, the second HSS returns a SAA message, and the SAA The message carries the subscription information of the UE in the area network.

S508: The S-CSCF network element in the area network sends a second 200OK message to the P-CSCF network element, where the second 200OK message includes the IMPU of the UE in the area network and the corresponding service-route A header field, where the service-route header field carries service routing information of the UE in the area network, and the service routing information is used to indicate an address of an S-CSCF network element in the area network.

Correspondingly, when the S-CSCF network element in the regional network sends a second 200OK message to the P-CSCF network element, it can also send the second 200OK message to the P-CSCF network element through the I-CSCF network element in the regional network. Send a second 200OK message.

S509: After receiving the second 200OK message, the P-CSCF network element saves the IMPU of the UE in the area network and the corresponding service-route header field, and places the UE in the area network. After the IMPU is added to the first 200OK message, the first 200OK message to which the UE's IMPU in the regional network is added is sent to the UE.

S510: The UE selects an IMPU (for example, selects an IMPU of the UE in the public network or selects an IMPU of the UE in the regional network), and initiates a call request to the P-CSCF network element. , The call request includes the selected IMPU.

S511: After receiving the call request, the P-CSCF network element queries the corresponding service-route header field according to the IMPU included in the call request, and forwards the call request according to the corresponding service-route header field.

Based on the same inventive concept as the method embodiment, the embodiment of the present application further provides a communication device for performing the method performed by the access processing network element in the foregoing method embodiment. For related features, refer to the foregoing method embodiment. To repeat, as shown in FIG. 6, the device includes a sending unit 601 and a receiving unit 602.

The sending unit 601 is configured to forward a first registration request from a terminal device to a first network;

The receiving unit 602 is configured to receive the first registration response information from the first network after the sending unit 601 forwards the first registration request from the terminal device to the first network, and the first registration response The information includes a public identification of the terminal device in the first network and subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device. ;

The sending unit 601 is further configured to send a second registration request to one or more target networks, where the one or more target networks are determined by the subscription network identification information;

The receiving unit 602 is further configured to receive second registration response information from the one or more target networks, where the second registration response message includes a public identifier of the terminal device in the corresponding target network. ;

The sending unit 601 is further configured to send third registration response information to the terminal device, where the third registration response information includes a public identity of the terminal device in the first network and the terminal device in the Public identity in one or more target networks.

In a possible implementation manner, the first registration request and the second registration request include a private identity of the terminal device.

Optionally, the communication device further includes a processing unit 603, and the processing unit 603 may determine to receive the one or more targets before the sending unit 601 sends the third registration response information to the terminal device. Second registration response information for each target network in the network.

After determining that the second registration response information of each of the one or more target networks is received, the sending unit 601 sends the third registration response information to the terminal device.

The processing unit 603 may be further configured to determine the one or more target networks. Specifically, the one or more target networks are determined by preset configuration information and the subscription network identification information; wherein, the The preset configuration information includes information for determining whether the access processing network element is reachable to each network.

After the receiving unit 602 receives the second registration response information from the registration processing network element in the one or more target networks, if the second registration response information further includes the terminal device in the corresponding target network The service routing information is used to indicate an address of a processing network element registered in a corresponding target network, and the processing unit 603 stores the public identification and service routing information of the terminal device in the corresponding target network in association. .

After that, after the sending unit 601 sends the third registration response information to the terminal device, the terminal device may send a call request based on the public identity in the third registration response message.

The receiving unit 602 receives a call request from the terminal device, and the call request includes a public identity of the terminal device in the first network or a public identity of the terminal device in any target network.

After that, the processing unit 603 determines the corresponding service routing information according to the public identity included in the call request.

Finally, the sending unit 601 forwards the call request of the terminal device according to the corresponding service routing information.

Optionally, the first registration response information, the second registration response information, and the third registration response information are all 200 OK messages.

Based on the same inventive concept as the method embodiment, an embodiment of the present application further provides a communication device for performing a method for performing a registration processing network element in the first network in the foregoing method embodiment. For related features, refer to the foregoing method embodiment. No further description is needed here. As shown in FIG. 7, the device includes a sending unit 701, a receiving unit 702, and a processing unit 703:

The processing unit 703 is configured to pass authentication of the terminal device according to a registration request from the terminal device;

The sending unit 701 is configured to send a first message to a first server after the processing unit 703 authenticates the terminal device according to a registration request from the terminal device, where the first message is used to request the Contract information of the terminal device, the first message includes a private identity of the terminal device;

The receiving unit 702 is configured to receive a second message from the first server, where the second message includes contract information of the terminal device, and the contract information includes that the terminal device is in a first network. And the subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device.

The sending unit 701 is further configured to send first registration response information to an access processing network element, where the first registration response information includes a public identity of the terminal device in the first network and a subscription network of the terminal device. Identification information

Based on the same inventive concept as the method embodiment, an embodiment of the present application further provides a communication device for executing the method performed by the first server in the foregoing method embodiment. For related features, refer to the foregoing method embodiment, and details are not described herein again. As shown in FIG. 8, the device includes a transceiver unit 801 and a processing unit 802:

The transceiver unit 801 is configured to receive a first message from a registration processing network element in a first network, where the first message is used to request subscription information of a terminal device, and the first request message includes the terminal device Private identity.

The processing unit 802 is configured to determine subscription information of the terminal device according to a private identifier of the terminal device, where the contract information includes a public identifier of the terminal device in the first network and a contract of the terminal device. Network identification information, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The transceiver unit 801 is further configured to send a second message to a registration processing network element in the first network, where the second message includes subscription information of the terminal device.

Specifically, the processing unit 802 obtains the subscription network identification information of the terminal device before determining the subscription information of the terminal device according to the private identification of the terminal device.

Based on the same inventive concept as the method embodiment, an embodiment of the present application further provides a communication apparatus for performing the method performed by the terminal device in the foregoing method embodiment. For related features, refer to the foregoing method embodiment, and details are not described herein again. As shown in FIG. 9, the device includes a sending unit 901 and a receiving unit 902:

The sending unit 901 is configured to send a registration request to an access processing network element;

The receiving unit 902 is configured to receive registration response information from the access processing network element, where the registration response information includes a public identifier of the terminal device in the first network and one or more of the terminal device. Public identity in each target network.

Optionally, the communication device may further include a processing unit 903. After the receiving unit 903 receives the registration response information from the access processing network element, the terminal device may initiate a call process. First, the receiving The unit 903 receives a network selection command, where the network selection command is used to determine a network to which the call requests access; after that, the processing unit 903 may, from the terminal device in the first network, according to the network selection command. The public identity and the terminal device select a public identity among the public identity in one or more target networks; after that, the sending unit 901 sends a call request to the access processing network element, and the call request includes all The public identity selected by the terminal device is described.

The division of units 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. In addition, each functional unit in each embodiment of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more units can be integrated into one module. The above integrated unit may be implemented in the form of hardware or in the form of software functional modules.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium It includes several instructions for causing a terminal device (which may be a personal computer, a mobile phone, or a network device) or a processor to perform all or part of the steps of the method in each embodiment of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks, and other media that can store program codes .

In the embodiment of the present application, the access processing network element, the registration processing network element in the first network, the first server, and the terminal device may be divided into functional modules in an integrated manner. Render. 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.

In a simple embodiment, those skilled in the art may think that the access processing network element, the registration processing network element in the first network, and the first server may all adopt the form shown in FIG. 10.

The communication device 1000 shown in FIG. 10 includes at least one processor 1001 and a memory 1002, and optionally, may further include a communication interface 1003.

The memory 1002 may be a volatile memory, such as a random access memory; the memory may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD), or a solid-state drive (solid-state drive, SSD), or memory 1002 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this. The memory 1002 may be a combination of the above memories.

The embodiment of the present application is not limited to a specific connection medium between the processor 1001 and the memory 1002. In the embodiment of the present application, the memory 1002 and the processor 1001 are connected by a bus 1004 in the figure. The bus 1004 is indicated by a thick line in the figure. The connection modes of other components are only for illustrative purposes and are not cited. Limited. The bus 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.

The processor 1001 may have a data transmitting and receiving function, and can communicate with other devices. In the device shown in FIG. 10, an independent data transmitting and receiving module, such as a communication interface 1003, may be provided for transmitting and receiving data. During communication, data can be transmitted through the communication interface 1003.

When the access processing network element adopts the form shown in FIG. 10, the processor 1001 in FIG. 10 can call a computer stored in the memory 1002 to execute instructions, so that the access processing network element can execute any one of the foregoing method embodiments. The method executed by the access processing network element in.

Specifically, the function / implementation process of the sending unit, the receiving unit, and the processing unit in FIG. 6 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002. Alternatively, the function / implementation process of the processing unit in FIG. 6 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002, and the function / implementation process of the sending unit and the receiving unit in FIG. 6 may be implemented by The communication interface 1003 in FIG. 10 is implemented.

When the registration processing network element in the first network adopts the form shown in FIG. 10, the processor 1001 in FIG. 10 can call a computer stored in the memory 1002 to execute instructions, so that the access processing network element can execute The method executed by the access processing network element in any one of the foregoing method embodiments.

Specifically, the functions / implementation processes of the sending unit, the receiving unit, and the processing unit in FIG. 7 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002. Alternatively, the function / implementation process of the processing unit in FIG. 7 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002, and the function / implementation process of the sending unit and the receiving unit in FIG. 7 may be implemented by The communication interface 1003 in FIG. 10 is implemented.

When the first server adopts the form shown in FIG. 10, the processor 1001 in FIG. 10 can call a computer stored in the memory 1002 to execute instructions, so that the access processing network element can execute any one of the foregoing method embodiments. The method executed by the access processing network element in.

Specifically, the function / implementation process of the transceiver unit and the processing unit in FIG. 8 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002. Alternatively, the function / implementation process of the processing unit in FIG. 8 may be implemented by the processor 1001 in FIG. 10 calling a computer execution instruction stored in the memory 1002, and the function / implementation process of the transceiver unit in FIG. 8 may be performed in FIG. 10 Communication interface 1003.

In a simple embodiment, those skilled in the art can think that the terminal device may adopt the form shown in FIG. 11.

The communication device 1100 shown in FIG. 11 includes at least one processor 1101 and a memory 1102, and optionally, may further include a transceiver 1103.

The memory 1102 may be a volatile memory, such as a random access memory; the memory may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD), or a solid-state drive (solid-state drive, SSD), or memory 1102 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this. The memory 1102 may be a combination of the above-mentioned memories.

A specific connection medium between the processor 1101 and the memory 1102 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 1102 and the processor 1101 are connected by a bus 1104 in the figure. The bus 1104 is indicated by a thick line in the figure. The connection modes of other components are only for illustrative purposes and are not cited. Limited. The bus 1104 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 11, but it does not mean that there is only one bus or one type of bus.

The processor 1101 may have a data transmitting and receiving function, and can communicate with other devices. In the device shown in FIG. 11, an independent data transmitting and receiving module, such as the transceiver 1103, may be provided for transmitting and receiving data. The processor 1101 is performing communication with other devices. During communication, data can be transmitted through the transceiver 1103.

When the terminal device adopts the form shown in FIG. 11, the processor 1101 in FIG. 11 can call a computer stored in the memory 1102 to execute instructions, so that the access processing network element can perform the connection in any one of the foregoing method embodiments. The method executed by the processing network element.

Specifically, the function / implementation process of the sending unit, the receiving unit, and the processing unit in FIG. 9 may be implemented by the processor 1101 in FIG. 11 calling a computer execution instruction stored in the memory 1102. Alternatively, the function / implementation process of the processing unit in FIG. 9 may be implemented by the processor 1101 in FIG. 11 calling a computer execution instruction stored in the memory 1102, and the function / implementation process of the sending unit and the receiving unit in FIG. 9 may be implemented by The transceiver 1103 in FIG. 11 is implemented.

Since the device provided in the embodiment of the present application can execute the foregoing communication method, for the technical effects that can be obtained, reference may be made to the foregoing method embodiment, and details are not described herein again.

Based on the same inventive concept as the method embodiment, the embodiment of the present application further provides a communication system for performing the method of any one of the foregoing embodiments. For related features, refer to the foregoing method embodiments, and details are not described herein again.

Refer to FIG. 2 for a schematic structural diagram of a communication system provided by an embodiment of the present application. Specifically, the communication system includes an access processing network element and a registration processing network element in a first network;

Optionally, the communication system may further include a first server, and the registration processing network element in the first network may further perform authentication on the terminal device according to the first registration request from the terminal device. Sending a first message to the first server, where the first message is used to request subscription information of the terminal device, and the first message includes a private identifier of the terminal device.

The first server first receives the first message from a registration processing network element in the first network, and then determines subscription information of the terminal device according to a private identifier of the terminal device, where the subscription information includes The public identification of the terminal device in the first network and the subscription network identification information of the terminal device. After that, the first server may send a second message to a registration processing network element in the first network, where the second message includes subscription information of the terminal device.

In a possible implementation manner, before the first server determines the subscription information of the terminal device according to the private identifier of the terminal device, the first server may also obtain the subscription network identification information of the terminal device, such as the first A server may acquire subscription network identification information of the terminal device from a server in each subscription network of the terminal device.

After the registration processing network element in the first network can receive a second message from the first server, and obtain subscription information of the terminal device.

Optionally, the communication system further includes at least one registration processing network element in the target network; when the access processing network element receives the first registration response message from the registration processing network element in the first network Thereafter, the access processing network element may send a second registration request to a registration processing network element in the at least one target network, where the second registration request may include a private identity of the terminal device; after that, the The registration processing network element in at least one target network receives the second registration request from the access processing network element.

The at least one target network is determined by the subscription network identification information. Specifically, the at least one target network may be determined by preset configuration information and the contracted network identification information; wherein the preset configuration information includes a method for determining whether the access processing network element connects to each network. Reachable information.

Specifically, the communication system may further include a second server in the target network.

For a registration processing network element in any target network, after receiving the second registration request from the access processing network element, the registration processing network element in the target network is retrieved from a second server in the target network. Acquiring contract information of the terminal device in the target network, where the contract information of the terminal device in the target network includes a public identity of the terminal device in the target network; The network element sends second registration response information, and the second registration response message includes a public identity of the terminal device in the target network.

The access processing network element receives second registration response information from a registration processing network element in the at least one target network.

In a possible implementation manner, when the second registration response information further includes service routing information of the terminal device in a corresponding target network, the service routing information is used to indicate registration processing in the corresponding target network. The address of the network element. After the access processing network element receives the second registration response information from the at least one target network, the access processing network element may associate and store the terminal device in the corresponding target network. Public identification and service routing information.

In a possible implementation manner, the access processing network element may first determine that the second registration response information of each target network in the at least one target network is received, and then, the access processing network element sends The terminal device sends third registration response information.

Optionally, the communication system further includes a terminal device; the terminal device may send a first registration request to the access processing network element, and the first registration request may include a private identity of the terminal device. The access processing network element receives a first registration request from the terminal device, and forwards the first registration request from the terminal device to a registration processing network element in the first network.

When the access processing network element receives a first registration response message from a registration processing network element in the first network and a second registration response message from a registration processing network element in the at least one target network The access processing network element may send third registration response information to the terminal device, wherein the third registration response information includes a public identification of the terminal device in the first network and the terminal The public identity of the device in the at least one target network.

The terminal device receives third registration response information from the access processing network element, and based on the public identity included in the third registration response information, the terminal device can initiate a call flow, and the specific process is as follows:

Receiving, by the terminal device, a network selection command, where the network selection command is used to determine a network that a call request accesses;

After that, the terminal device selects a public identity from the public identity of the terminal device in the first network and the public identity of the terminal device in one or more target networks according to the network selection command;

The terminal device sends a call request to the access processing network element, and the call request includes a public identifier selected by the terminal device.

The access processing network element receives a call request from the terminal device; determines corresponding service routing information according to a public identifier included in the call request; and thereafter, the access processing network element according to the corresponding service The routing information forwards the call request of the terminal device.

Based on the above process, the terminal device may be registered in the first network and the at least one target network, and may initiate a call flow to the first network or the at least one target network. The terminal device of the first network or the at least one target network communicates.

Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

This application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to this application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that instructions generated by the processor of the computer or other programmable data processing device may be used to Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A network registration method, characterized in that the method includes:

After forwarding the first registration request from the terminal device to the first network, the access processing network element receives the first registration response information from the first network, where the first registration response information includes the The public identification in the first network and the subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The access processing network element sends a second registration request to one or more target networks, where the one or more target networks are determined by the subscription network identification information;

Receiving, by the access processing network element, second registration response information from the one or more target networks, wherein the second registration response message includes a public identity of the terminal device in the corresponding target network;

The access processing network element sends third registration response information to the terminal device, where the third registration response information includes a public identification of the terminal device in the first network and the terminal device in the one or Public identity across multiple target networks.
The method according to claim 1, wherein before the access processing network element sends the third registration response information to the terminal device, further comprising:

The access processing network element determines that the second registration response information of each of the one or more target networks is received.
The method according to claim 1, wherein the one or more target networks are determined by the subscription network identification information, specifically:

The one or more target networks are determined by preset configuration information and the contracted network identification information; wherein the preset configuration information includes a method for determining whether the access processing network element is reachable to each network. Information.
The method according to any one of claims 1-3, wherein the second registration response information further includes service routing information of the terminal device in a corresponding target network, and the service routing information is used to indicate The address of the registration processing network element in the corresponding target network. After the access processing network element receives the second registration response information from the one or more target networks, the method further includes:

The access processing network element stores the public identification and service routing information of the terminal device in the corresponding target network in association.
The method according to claim 4, wherein after the access processing network element sends the third registration response information to the terminal device, further comprising:

Receiving, by the access processing network element, a call request from the terminal device, where the call request includes a public identity of the terminal device in the first network or any target network;

Determining, by the access processing network element, corresponding service routing information according to a public identity included in the call request;

The access processing network element forwards the call request of the terminal device according to the corresponding service routing information.
The method according to any one of claims 1-5, wherein the first registration response information, the second registration response information, and the third registration response information are 200OK messages.
A network registration method, characterized in that the method includes:

The registration processing network element in the first network sends a first message to the first server after the terminal device is authenticated according to the registration request from the terminal device, and the first message is used to request a contract of the terminal device. Information, the first message includes a private identifier of the terminal device;

The registration processing network element in the first network receives a second message from the first server, where the second message includes contract information of the terminal device, and the contract information includes that the terminal device is in the first A public identifier in a network and subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The registration processing network element in the first network sends first registration response information to the access processing network element, where the first registration response information includes a public identity of the terminal device in the first network and the terminal device's Contracted network identification information.
A network registration method, characterized in that the method includes:

Receiving, by a first server, a first message from a registration processing network element in a first network, the first message is used to request subscription information of a terminal device, and the first message includes a private identifier of the terminal device;

Determining, by the first server, the contract information of the terminal device according to a private identifier of the terminal device, where the contract information includes a public identifier of the terminal device in the first network and contract network identifier information of the terminal device , Wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The first server sends a second message to a registration processing network element in the first network, where the second message includes subscription information of the terminal device.
The method according to claim 8, wherein before the first server determines the contract information of the terminal device according to the private identification of the terminal device, further comprising:

Acquiring, by the first server, subscription network identification information of the terminal device.
A network registration method, characterized in that the method includes:

The terminal device sends a registration request to the access processing network element;

Receiving, by the terminal device, registration response information from the access processing network element, wherein the registration response information includes a public identifier of the terminal device in the first network and one or more targets of the terminal device Public identity in the network.
The method according to claim 10, wherein after receiving the registration response information from the access processing network element, the terminal device further comprises:

Selecting, by the terminal device, a public identification from the public identification of the terminal device in the first network and the public identification of the terminal device in one or more target networks;

The terminal device sends a call request to the access processing network element, and the call request includes a public identifier selected by the terminal device.
A communication device, characterized in that the communication device includes a sending unit and a receiving unit;

The sending unit is configured to forward the first registration request from the terminal device to the first network;

The receiving unit is configured to receive the first registration response information from the first network after the sending unit forwards the first registration request from the terminal device to the first network, where the first registration response information includes The public identification of the terminal device in the first network and the subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The sending unit is further configured to send a second registration request to one or more target networks, where the one or more target networks are determined by the subscription network identification information;

The receiving unit is further configured to receive second registration response information from the one or more target networks, where the second registration response message includes a public identity of the terminal device in the corresponding target network;

The sending unit is further configured to send third registration response information to the terminal device, where the third registration response information includes a public identity of the terminal device in the first network and the terminal device in the one Or a public identity in multiple target networks.
The communication device according to claim 12, wherein the communication device further comprises a processing unit, and before the sending unit sends the third registration response information to the terminal device, the processing unit is configured to:

It is determined that the second registration response information of each of the one or more target networks is received.
The communication device according to claim 12, wherein the one or more target networks are determined by the subscription network identification information, specifically:

The one or more target networks are determined by preset configuration information and the contracted network identification information; wherein the preset configuration information includes a method for determining whether the access processing network element is reachable to each network. Information.
The communication device according to any one of claims 12 to 14, wherein the second registration response information further includes service routing information of the terminal device in a corresponding target network, and the service routing information is used for Indicating an address of a registration processing network element in a corresponding target network, and after the receiving unit receives the second registration response information from the one or more target networks, the processing unit is further configured to:

The public identification of the terminal device in the corresponding target network and the corresponding service routing information are stored in association.
The communication device according to claim 15, wherein the receiving unit is further configured to:

Receiving a call request from the terminal device, the call request including a public identity of the terminal device in the first network or any target network;

The processing unit is further configured to:

Determining corresponding service routing information according to a public identity included in the call request;

The sending unit is further configured to:

Forward the call request of the terminal device according to the corresponding service routing information.
The communication device according to any one of claims 12 to 16, wherein the first registration response information, the second registration response information, and the third registration response information are 200OK messages.
A communication device, wherein the communication device includes a sending unit, a receiving unit, and a processing unit:

The processing unit is configured to pass authentication of the terminal device according to a registration request from the terminal device;

The sending unit is configured to send a first message to the first server after the processing unit authenticates the terminal device according to a registration request from the terminal device, where the first message is used to request the terminal device Contract information, the first message includes a private identifier of the terminal device;

The receiving unit is configured to receive a second message from the first server, where the second message includes contract information of the terminal device, and the contract information includes the terminal device's Public identification and subscription network identification information of the terminal device, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The sending unit is further configured to send first registration response information to the access processing network element, where the first registration response information includes a public identifier of the terminal device in the first network and a subscription network identifier of the terminal device. information.
A communication device, wherein the communication device includes a transceiver unit and a processing unit:

The transceiver unit is configured to receive a first message from a registration processing network element in a first network, the first message is used to request subscription information of a terminal device, and the first request message includes a Private identification

The processing unit is configured to determine subscription information of the terminal device according to a private identifier of the terminal device, where the contract information includes a public identifier of the terminal device in a first network and a contracted network of the terminal device Identification information, wherein the subscription network identification information includes network identifications of one or more subscription networks of the terminal device;

The transceiver unit is further configured to send a second message to a registration processing network element in the first network, where the second message includes subscription information of the terminal device.
The communication device according to claim 19, wherein before the processing unit determines subscription information of the terminal device according to a private identifier of the terminal device, the processing unit is further configured to:

Acquiring subscription network identification information of the terminal device.
A communication device, wherein the communication device includes a sending unit and a receiving unit:

The sending unit is configured to send a registration request to an access processing network element;

The receiving unit is configured to receive registration response information from the access processing network element, where the registration response information includes a public identifier of the terminal device in the first network and one or more of the terminal device Public identity in the target network.
The communication device according to claim 21, wherein the communication device further comprises a processing unit;

The processing unit is configured to select a public identity from the public identity of the terminal device in the first network and the public identity of the terminal device in one or more target networks;

The sending unit is further configured to send a call request to the access processing network element, where the call request includes a public identifier selected by the terminal device.
A communication system, characterized in that the communication system includes an access processing network element and a registration processing network element in a first network;

The access processing network element is configured to forward a first registration request from a terminal device to a registration processing network element in the first network; and receive a first registration processing network element from the first network. Registration response information, the first registration response information includes a public identification of the terminal device in the first network and subscription network identification information of the terminal device, wherein the subscription network identification information includes the terminal device The network identification of one or more of the subscribed networks;

A registration processing network element in the first network, configured to authenticate the terminal device according to a first registration request from the terminal device, and send the first registration response to the access processing network element information.
The communication system according to claim 23, wherein the communication system further comprises a first server;

The registration processing network element in the first network is further configured to send a first message to the first server after the terminal device is authenticated according to the first registration request from the terminal device, A first message for requesting subscription information of the terminal device, the first message including a private identification of the terminal device; and receiving a second message from the first server;

The first server is configured to receive the first message from a registration processing network element in the first network, and determine subscription information of the terminal device according to a private identifier of the terminal device. Including a public identification of the terminal device in the first network and subscription network identification information of the terminal device; and sending a second message to a registration processing network element in the first network, where the second message Including contract information of the terminal device.
The communication system according to claim 23 or 24, wherein the communication system further comprises at least one registration processing network element in the target network;

The access processing network element is further configured to send a second registration request to a registration processing network element in the at least one target network, wherein the at least one target network is determined by the subscription network identification information; and Receiving second registration response information from a registration processing network element in the at least one target network, wherein the second registration response message includes a public identity of the terminal device in the corresponding target network;

A registration processing network element in the at least one target network, configured to receive the second registration request from the access processing network element; and obtain the terminal device from a second server in the corresponding target network The contract information in the corresponding target network, wherein the contract information of the terminal device in the corresponding target network includes a public identity of the terminal device in the corresponding target network; and The ingress processing network element sends second registration response information.
The communication system according to any one of claims 23 to 25, wherein the communication system further comprises a terminal device;

The terminal device is configured to send a first registration request to the access processing network element; and receive third registration response information from the access processing network element, wherein the third registration response information includes all The public identity of the terminal device in the first network and the public identity of the terminal device in the at least one target network;

The access processing network element is further configured to receive a first registration request from the terminal device; and send third registration response information to the terminal device.
A computer storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions,

The computer-executable instructions are used to cause a computer to perform the method according to any one of claims 1 to 11.
A computer program product containing instructions that, when run on a computer, causes the computer to perform the method of any one of claims 1-11.