CN-122002261-A - Network entry registration method and device for roaming from LET network to GSM network

CN122002261ACN 122002261 ACN122002261 ACN 122002261ACN-122002261-A

Abstract

The application discloses a network access registration method from LTE network roaming to GSM, which comprises the steps of receiving a GSM network authentication request forwarded by an international signaling transfer point at a protocol conversion function side, converting the authentication request into an authentication request of the LTE network, sending the authentication request to a home subscription server of the LTE network according to an international mobile subscriber identification number, enabling the home subscription server to generate an LTE network authentication parameter according to authorized authentication information in response to the authentication request, receiving an authentication response message sent by the home subscription server, wherein the message carries the LTE network authentication parameter, extracting the LTE network authentication parameter from the authentication response message and constructing a GSM network authentication response message, wherein the message carries the GSM network authentication parameter, and forwarding the GSM network authentication response message to a visiting location register/mobile switching center in the GSM network so as to perform network access registration according to the GSM network authentication parameter. The application solves the problem of network-crossing roaming registration failure.

Inventors

GAO SHUJIANG
ZHU JINGAN
WEI HONG
LIU JUNXIAO
GAO HONGYAN

Assignees

上海欣方智能系统有限公司
上海欣方软件有限公司

Dates

Publication Date: 20260508
Application Date: 20260325

Claims (10)

1. A network entry registration method for roaming from a long term evolution LTE network to a global system for mobile communication (GSM) is characterized in that the method comprises a protocol conversion function side for carrying out protocol conversion between a GSM network communication protocol and an LTE network communication protocol, Receiving a GSM network authentication request forwarded via an international signaling transfer point, wherein the GSM network authentication request carries an international mobile subscriber identity number, transmitting by a visitor location register/mobile switching center in the GSM network in response to an access signal from a mobile terminal subscribing to an LTE network service, Converting the GSM network authentication request into an authentication request of the LTE network, transmitting the authentication request to a home subscription server of the LTE network according to the international mobile subscriber identification number, so that the home subscription server responds to the authentication request according to the authorized authentication information to generate LTE network authentication parameters, wherein the authentication request carries parameters for simulating an interface of the LTE network to acquire the authorized authentication information, Receiving an authentication response message sent by a home subscription server, wherein the authentication response message carries an LTE network authentication parameter, extracting the LTE network authentication parameter from the authentication response message and constructing a GSM network authentication response message, wherein the GSM network authentication response message carries the GSM network authentication parameter, Forwarding the GSM network authentication response message to a visitor location register/mobile switching center in the GSM network through an international signaling transfer point so that the visitor location register/mobile switching center in the GSM network performs network access registration according to the GSM network authentication parameters in the GSM network authentication response message; Wherein the user identification information of the mobile terminal is not stored and used.
2. The network entry registration method of claim 1, further comprising: The protocol conversion function side receives the location update message forwarded by the international signaling transfer point, the location update message is sent by a visiting location register/mobile switching center in the GSM network after network entry registration is successful, And the protocol conversion function side responds to the position updating message, constructs a user data request message and sends the user data request message to a home subscription server of the LTE network.
3. The network entry registration method of claim 2, further comprising: The protocol conversion function receives a user data response message from a home subscription server of the LTE network, the user data response message being transmitted by the home subscription server of the LTE network in response to the user data request message, Based on the user data response message, constructing an international user dialing signaling message, and forwarding the message to a visiting location register/mobile switching center in the GSM network through an international signaling transfer point so as to enable the visiting location register/mobile switching center in the GSM network to perform user data synchronization.
4. A method of network entry registration according to claim 3, wherein the method further comprises: The protocol conversion function side receives the international user dialing signaling confirmation message forwarded by the international signaling transfer point, and the international user dialing signaling confirmation message is sent by a visiting location register/mobile switching center in the GSM network after user data synchronization is performed in response to the international user dialing signaling message.
5. The network entry registration method of claim 1, further comprising: The protocol conversion function side is used as an application server in the service process of the communication service to perform protocol conversion between a GSM network communication protocol and an IP multimedia subsystem communication protocol in an LTE network.
6. The method of claim 1, wherein the authentication request further carries a GSM network authentication parameter comprising a triplet of a random number, a symbol response, and a session encryption key, The converting the authentication request into an authentication request of the LTE network includes: Based on the mobile application part protocol stack and the diameter protocol stack, converting the authentication request conforming to the mobile application part protocol into an authentication request conforming to the diameter protocol, the authentication request carrying authentication information request-UTRAN-GERAN Authentication-Info parameters requesting the universal telecommunication radio access network authorization, The address of a visiting location register/mobile switching center from which the authentication request is sent is used as a visiting network identifier, a random number in a triplet is converted into a random number in an LTE side authentication vector, a symbol response in the triplet is converted into an expected response in the authentication vector, a session encryption key in the triplet is converted into a root key in the authentication vector, the converted random number, the expected response, the root key and the added authentication token are used as quadruples of the authentication vector, and the visiting network identifier, the authentication vector, the instant response priority parameter and the international mobile subscriber identification number are used as LTE network authentication parameters and are packaged in a request-UTRAN-GERAN Authentication-Info; the home subscription server generating the LTE network authentication parameters according to the authorized authentication information comprises the following steps: The home subscription server responds to the authentication request, generates an authentication vector according to authorized authentication information, and sends the generated authentication vector to a protocol conversion function side after carrying the generated authentication vector in authentication parameters of an authentication response message, wherein the generated authentication vector comprises a quadruple group consisting of a random number, an expected response, an authentication token and a root key, and the authentication response message conforms to a diameter protocol.
7. The network entry registration method of claim 1, wherein the extracting the LTE network authentication parameters from the authentication response message and constructing the GSM network authentication response message comprises: Extracting the random number in the authentication vector in the authentication response message as the random number in the authentication parameter of the authentication response message of the GSM network, Extracting expected response in authentication vector in authentication response message as symbol response in authentication parameter of GSM network authentication response message, Extracting a root key in an authentication vector in the authentication response message as a session encryption key in authentication parameters of the authentication response message of the GSM network, The random number, the symbol response and the session encryption key in the authentication parameters of the GSM network authentication response message are formed into a triplet of authentication parameters and carried in the authentication response message, and the authentication response message is converted into the GSM network authentication response message conforming to the mobile application part protocol based on the diameter protocol stack.
8. The network entry registration method according to claim 1, wherein the international signaling transfer point is configured with a global title correspondence between a functional entity in the GSM network and the global title, and is configured to forward a message from a visitor location register/mobile switching center in the GSM network to a protocol conversion functional side based on the global title correspondence.
9. The network registration method according to claim 1, wherein the protocol conversion function side is configured with a global title address required for interfacing with a functional entity in the GSM network and information required for interfacing with each home subscription server in the LTE network, the information including at least one of a domain name, an IP address, and a port number for transmitting a message forwarded via the International signaling transfer point to a corresponding home subscription server in the LTE network, Wherein, the The global title address is used for forwarding the message from the home subscription server in the LTE network to the corresponding functional entity in the GSM network through the international signaling transfer point.
10. An in-network registration apparatus for roaming from a long term evolution network to a global system for mobile communications network, the apparatus comprising: A first conversion module for receiving a GSM network authentication request forwarded by an international signaling transfer point, wherein the GSM network authentication request carries an international mobile subscriber identification number, the GSM network authentication request is sent by a visitor location register/mobile switching center in the GSM network in response to an access signal from a mobile terminal subscribing to an LTE network service, Converting the GSM network authentication request into an authentication request of the LTE network, transmitting the authentication request to a home subscription server of the LTE network according to the international mobile subscriber identification number, so that the home subscription server responds to the authentication request according to the authorized authentication information to generate LTE network authentication parameters, wherein the authentication request carries parameters for simulating an interface of the LTE network to acquire the authorized authentication information, A second conversion module, configured to receive an authentication response message sent by the home subscription server, where the authentication response message carries an LTE network authentication parameter, extract the LTE network authentication parameter from the authentication response message and construct a GSM network authentication response message, where the GSM network authentication response message carries a GSM network authentication parameter, Forwarding the GSM network authentication response message to a visitor location register/mobile switching center in the GSM network through an international signaling transfer point so that the visitor location register/mobile switching center in the GSM network performs network access registration according to the GSM network authentication parameters in the GSM network authentication response message; Wherein the user identification information of the mobile terminal is not stored and used.

Description

Network entry registration method and device for roaming from LET network to GSM network Technical Field The present application relates to the field of mobile communications, and in particular, to a network entry registration method for roaming from a long term evolution (LET) network to a global system for mobile communications (GSM) network. Background As wireless communication networks evolve, the progress of network construction in different areas is different, resulting in roaming between different wireless communication networks. For example, one area wireless communication network fully enters the 4G/5G LTE network era, another area may be in a 2/3G GSM network, so that a mobile terminal needs to access a roaming area network to implement basic communication services, a home core network is needed to provide registration authentication services during network registration, and signaling protocols used for network registration authentication of the mobile terminal in different network modes are completely different. For example, the number of the cells to be processed, The 3G network registration proceeds as follows: Under the 3G GSM network, the mobile terminal performs signaling interaction with a number attribution location register (HLR, home Location Register) through a mobile application part MAP (Mobile Application Part) protocol, triggers a network access authentication request, receives response triplet authentication parameters of the HLR, and performs online authentication according to the authentication parameters to generate an authentication response by the mobile terminal side so as to realize network access registration of the mobile terminal by the core network side. The 4G network entry registration proceeds as follows: And under the 4G LTE network, the mobile terminal performs message interaction with a number home subscriber server (HSS, home Subscriber Server) through a Diameter over IP protocol, initiates a network access authentication request, generates authentication quadruple parameters, and performs bidirectional authentication and key negotiation with the network side after receiving the authentication quadruple parameters by the mobile terminal side so as to complete network access registration of the mobile terminal. At present, the whole network-quitting work of the 2/3G network is about to be completed in China, if the mobile terminal of the 4G LTE network in China roams outside the country after network-quitting, the network accessing the roaming place outside the country is a 3G GSM network, at the moment, the roaming mobile terminal initiates a network-accessing authentication request, after signaling passes through an international signaling transfer point, the 3G core network support of the corresponding attribution can not be found, and network-accessing registration failure is caused. Disclosure of Invention The embodiment of the application provides a network access registration method for roaming from a long term evolution (LET) network to a global system for mobile communication (GSM) network, which aims to solve the problem of network access registration failure under the condition of cross-network roaming. A first aspect of an embodiment of the present application provides a network entry registration method for roaming from a long term evolution LTE network to a global system for mobile communications GSM, the method comprising, at a protocol conversion function side for performing protocol conversion between a GSM network communication protocol and an LTE network communication protocol, Receiving a GSM network authentication request forwarded via an international signaling transfer point, wherein the GSM network authentication request carries an international mobile subscriber identity number, transmitting by a visitor location register/mobile switching center in the GSM network in response to an access signal from a mobile terminal subscribing to an LTE network service, Converting the GSM network authentication request into an authentication request of the LTE network, transmitting the authentication request to a home subscription server of the LTE network according to the international mobile subscriber identification number, so that the home subscription server responds to the authentication request according to the authorized authentication information to generate LTE network authentication parameters, wherein the authentication request carries parameters for simulating an interface of the LTE network to acquire the authorized authentication information, Receiving an authentication response message sent by a home subscription server, wherein the authentication response message carries an LTE network authentication parameter, extracting the LTE network authentication parameter from the authentication response message and constructing a GSM network authentication response message, wherein the GSM network authentication response message carries the GSM n