CN1968507A - Mobile terminal positioning method and system - Google Patents

Abstract

The invention provides a positioning method and system for a mobile terminal. The method includes: the first mobile terminal sends a positioning request message carrying its own International Mobile Subscriber Identity (IMSI); the mobile network management subsystem obtains the positioning request message, and searches for the location corresponding to the IMSI number of the first mobile terminal in the positioning request message. MSISDN number, send to the positioning platform server an authentication request or an accounting request message carrying the MSISDN and IP address; the positioning platform server saves the corresponding relationship between the first mobile terminal MSISDN and the IP address in the authentication request or accounting request message, and feeds back the authentication A response message or a charging response message; the mobile network management subsystem obtains the authentication response message or the charging response message, and sends the first mobile terminal IP address and the positioning request message including the IMSI to the positioning platform server; the positioning platform server executes the positioning operation . The present invention utilizes the existing network to enable the SLP to quickly obtain the MSISDN of the originating positioning terminal, thereby realizing the positioning operation of the determined mobile terminal.

Description

A mobile terminal positioning method and system

technical field

The invention relates to a mobile communication technology, especially a method for a positioning server to acquire an originating positioning terminal identifier and a terminal positioning system thereof in a mobile location service based on a safe user plane.

Background technique

For the secure user plane-based mobile location (SUPL, Secure User Plane Location) service, the international standard organization OMA has formulated a set of SUPL protocols to comprehensively regulate this service. In the case of terminal origination, a target terminal can actively initiate a positioning request to the SUPL Location Platform (SLP, SUPL Location Platform), and obtain accurate location information of itself or other mobile terminals through the subsequent SUPL positioning process.

In the case of terminal-initiated positioning, the mobile terminal actively initiates a positioning request to the SUPL positioning platform (SLP), and carries its own unique identifier in the request message reported to the positioning platform, and the positioning platform will use this identifier for billing , authentication and other operations. Based on the characteristics of the current GSM system, the unique identifier reported by the mobile terminal to the positioning platform is an International Mobile Subscriber Identity (IMSI, International Mobile Subscriber Identity), but the positioning platform is not easy to implement authentication and calculation of users based on the IMSI of the mobile terminal For this reason, existing positioning platforms use mobile terminal international ISDN numbers (MSISDN) instead of IMSI to provide SUPL services.

In the prior art, the SUPL positioning platform can obtain the MSISDN in the following two ways.

The corresponding relationship between the IMSI and the MSISDN of the mobile terminal is determined by sending signaling to the HLR or VLR in real time. The disadvantage of this method is that not all HLRs in the existing network provide interfaces to support the query operation of the positioning platform; Or the VLR searches to determine the MSISDN of the mobile terminal. It can be seen from the above that this method will encounter many limitations of the existing system during the implementation process, so the practicability is not strong.

Another method currently available is that the user first opens an account on the positioning platform (SLP) before using the location service. The corresponding relationship between the MSISDN and the IMSI of the mobile terminal is stored in the local database. The defect of this method is that although the positioning platform can query the corresponding relationship between MSISDN and IMSI through the interface, however, when the number of users opens a large number of accounts, the positioning platform may need to save a large amount of data, which increases the burden on the system; on the other hand, this The premise of the implementation of the method is that the user firstly applies to establish an account on the positioning platform. This technical feature increases the complexity of the positioning service application, thereby limiting the development of the SUPL service.

Contents of the invention

The purpose of the present invention is to provide a mobile terminal positioning method, so that the positioning platform server can quickly realize positioning-related operations according to the MSISDN number of the mobile terminal for originating positioning; another purpose of the present invention is to provide a mobile terminal positioning system.

In order to solve the above technical problems, the object of the present invention is achieved through the following technical solutions.

A mobile terminal positioning method, comprising: a first mobile terminal sends a positioning request message carrying its own International Mobile Subscriber Identity IMSI; a mobile network management subsystem obtains the positioning request message, and searches for the MSISDN corresponding to the IMSI number of the first mobile terminal number, send a service request message comprising the first mobile terminal MSISDN and IP address to the positioning platform server; the positioning platform server saves the correspondence between the first mobile terminal MSISDN and the IP address in the service request message, and feeds back a service response message; mobile network management The subsystem acquires the service response message, sends the IP address of the first mobile terminal and the positioning request message to the positioning platform server; and the positioning platform server executes the positioning operation.

In the above method, the positioning operation of the positioning platform server includes: the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, and performs authentication and/or positioning operations on the first mobile terminal; It also includes the positioning protocol supported by the first mobile terminal and the current cell location identifier.

Alternatively, the positioning request message of the first mobile terminal further includes the second mobile terminal identifier, and the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, performs an authentication operation, and performs an authentication operation according to the second mobile terminal identifier in the positioning request message. The mobile terminal identifier performs a positioning operation on the second mobile terminal.

In the above method, the mobile network management subsystem is a GPRS gateway support node GGSN.

Or, the mobile network management subsystem includes a GPRS gateway support node GGSN and an AAA server; the GGSN obtains a location request message, and sends an authentication request message or a charging request message including the IMSI and IP address of the first mobile terminal to the AAA server; The AAA server searches for the MSISDN number corresponding to the IMSI number, and sends an authentication request message or an accounting request message including the MSISDN and IP address to the positioning platform server.

The service request message described in this method is a Radius protocol message of the remote user dial-in authentication service. Further, the service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message. The above authentication request message may also include a user password. The above charging request message includes: charging status type, which is used to indicate service start or service end; number of uplink bytes; number of downlink bytes, etc. The Accounting Response message may contain information about the Agent Status and/or Service Provider; it may also have no attributes.

On the basis of the above method, after the positioning operation is completed, the positioning platform server releases the corresponding relationship between the IP address of the first mobile terminal and the MSISDN.

A mobile terminal positioning system, comprising: a gateway GPRS support node GGSN, which obtains a positioning request message of a first mobile terminal, and sends a service request message including the IMSI and IP address of the first mobile terminal to an AAA server; and obtains the forwarded by the AAA server After the service response message, send the first mobile terminal IP address and a positioning request message containing the IMSI to the positioning platform server; the AAA server is used to search for the MSISDN corresponding to the first mobile terminal IMSI, and sends a message containing the first mobile terminal MSISDN and the positioning request message to the positioning platform server. The service request message of the IP address; and, forward the service response message of the positioning platform server to the GGSN; the positioning platform server is used to store the correspondence between the MSISDN and the IP address in the service request message, and feed back the service response message; and, execute the positioning operation.

On the basis of the above system structure, the positioning operation shown includes: the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, and performs authentication and/or positioning operations on the first mobile terminal.

Alternatively, the positioning request message further includes a second mobile terminal identifier; the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, performs an authentication operation, and performs an authentication operation on the first mobile terminal according to the second mobile terminal identifier in the positioning request message. 2. The mobile terminal performs a positioning operation.

The service request message described in this system is the Radius protocol message of the remote user dial-in authentication service. Further, the service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message.

A positioning system for a mobile terminal, comprising: a gateway support node GGSN, which acquires a positioning request message sent by a first mobile terminal, searches for the MSISDN number corresponding to the IMSI number of the first mobile terminal in the positioning request message, and sends to a positioning platform server a message including the first A service request message of the mobile terminal MSISDN and IP address; and, after obtaining the service response message of the positioning platform server, send the first mobile terminal IP address and a positioning request message including the IMSI to the positioning platform server; the positioning platform server is used to save the service Requesting the correspondence between the MSISDN and the IP address of the first mobile terminal in the message, and feeding back a service response message; and, performing a positioning operation.

The service request message described in this system is the Radius protocol message of the remote user dial-in authentication service. Further, the service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message.

As can be seen from the above technical solutions, the present invention makes full use of existing network resources, utilizes the user information preserved in the existing system database to search and determine the MSISDN number corresponding to the mobile terminal IMSI; on the other hand, the present invention expands the SUPL positioning platform The function of (SLP), as a Radius Server, supports the business operation process (authentication or billing process) of the Radius protocol, so as to obtain the MSISDN number required for positioning/authentication/charging of the mobile terminal through the process. The present invention not only solves the problem that SLP cannot obtain the MSISDN of the originating positioning mobile terminal, but further compared with the prior art, the realization of the present invention does not require large-scale changes to the existing system, so it is easier to implement; and, the present invention By using the existing system database, the positioning platform server does not need to store terminal information permanently, thus reducing the system load.

Description of drawings

Fig. 1 is the schematic diagram of the first embodiment of the present invention;

Fig. 2 is the schematic diagram of the second embodiment of the present invention;

Fig. 3 is a structural diagram of the first embodiment of the system of the present invention.

Detailed ways

The core of the present invention is: Utilize the corresponding relationship between IMSI and MSISDN stored in the existing Radius Proxy database to convert the IMSI number of the mobile terminal into an MSISDN number; ) obtains the MSISDN of the originating positioning mobile terminal from the service request message forwarded, that is, obtains the MSISDN number required for positioning/authentication/charging of the mobile terminal through the described process, and then realizes the authentication of the originating positioning mobile terminal /Charging, and positioning operations for certain terminals. In the following embodiments, the authentication flow/billing flow in the service request message flow is taken as an example to illustrate the specific implementation of the present invention, but the present invention does not exclude the means of implementing the present invention by using other service request message flows.

Based on the above core idea, the specific implementation of the present invention will be specifically described below.

FIG. 1 is a schematic diagram of a first embodiment of the present invention. The system structure shown in this figure includes a Radius protocol client 11, a Radius protocol proxy 12 and a Radius protocol server 13, wherein the Radius protocol client 11 and the Radius protocol proxy 12 constitute the mobile network management subsystem of the present invention. As shown in the figure, a mobile terminal that needs to request a location service first passes through the mobile network management subsystem (Radius Client11 and Radius Proxy12) to the Radius Server13 for authentication or billing before initiating a location request to the SLP. Wherein, the preferred GGSN of the Radius Client, the preferred AAA server of the Radius Proxy, and the SUPL positioning platform (SLP) completes the function of authentication or billing as the Radius Server.

Referring to FIG. 1 , the message flow based on the system shown in the figure will be described in detail by taking a mobile terminal requesting its own positioning as an example.

1) The mobile terminal initiates a location request. In this embodiment, the location request message is a self-location request message SUPL START, and the request message carries the IMSI number of the terminal and corresponding service information, including: location capability information of the mobile terminal ( Such as the positioning technology supported by the terminal, and the corresponding positioning protocol, etc.), the current cell location identifier and other information. In this document, the mobile terminal that initiates the positioning request is referred to as the mobile terminal that initiates the positioning.

2) Radius Client obtains described positioning request message, judges described message type according to preset rule, and the configuration method of Radius client is technology known in the art; The Radius Proxy sends a service request message (specifically, an authentication request message or an accounting request message), and the message includes the IMSI number and IP address of the originating mobile terminal. The authentication request message or the charging request message is a Radius protocol message, which is used for the identity authentication or charging of the mobile terminal. Except the IP address and the IMSI number, the authentication request message usually also includes the user password; the charging request The message may include: the charging status type, which is used to indicate the start or end of the service; the number of uplink bytes; the number of downlink bytes, etc. Further, information such as the GGSN IP address, GGSN identifier, and protocol type may also be added to the authentication request message or the accounting request message.

3) The local database of Radius Proxy (such as AAA server) saves the corresponding relationship between the IMSI and MSISDN of all account-opening mobile terminals, and configures the corresponding relationship between the domain name of the mobile terminal and the IP address of the Radius Server to distinguish the authentication requests of mobile terminals with different domain names or The billing request is correctly sent to the Radius Server that provides the Radius control service for the domain name; after the Radius Proxy obtains the authentication request message or the billing request message from the Radius Client, it converts the IMSI carried in the message into the corresponding MSISDN according to the records in the local database. Then according to the domain name carried in the request message, this authentication request message or the accounting request message is forwarded to the corresponding Radius Server, and the IP address and the MSISDN number of the mobile terminal are carried in the service request message (authentication request message or accounting request message) . In the present invention, SLP is used as Radius Server to realize the Radius control function, that is, the IP address of Radius Server is configured as the IP address of SLP, and Radius Proxy sends authentication request message or billing request message to correct SLP according to the IP address to move Terminal authentication or accounting.

4) After the Radius Server, that is, the SUPL Positioning Platform (SLP) server receives the service request message (authentication request message or billing request message) sent by the Radius Proxy, it saves the correspondence between the IP address of the mobile terminal carried in the message and the MSISDN relationship, and return a correct service response message (specifically, an authentication response message corresponding to the authentication request message, or an accounting response message corresponding to the accounting request message). The authentication response message or the accounting response message is a Radius protocol message. The charging response message may contain agent status and/or service provider information, or may not have any attributes.

5) Radius Proxy forwards the authentication response message or accounting response message back to Radius Client.

6) After the Radius Client receives the authentication response message or the billing response message, it redirects the positioning request message of the mobile terminal to the SLP, and the message will carry the IMSI number of the mobile terminal for originating positioning, and the SLP obtains the The IP address of the originating location mobile terminal in the message header. As mentioned above, the self-location request message includes information such as the IMSI number, the location capability information of the mobile terminal (such as the location technology supported by the terminal, and the corresponding location protocol, etc.), the current cell location identifier, and the like. The SLP finds the corresponding MSISDN number in the local database according to the IP address, and performs operations related to positioning of the mobile terminal, and the operations related to positioning include authentication, charging and positioning operations.

As known to those skilled in the art, in the existing GPRS system, the main function of the SGSN is to record the current location information of the mobile station, and complete the sending and receiving of mobile packet data between the mobile station and the GGSN; The GPRS backbone network is connected to the SGSN, which is the gateway connecting the GSM network and the external packet switching network (such as the Internet and local area network). Remote TCP/IP or X.25 network. In the foregoing embodiment, GGSN has completed the related operations of step 2) and step 6) as Radius Client, and the present invention does not exclude the implementation of SGSN as Radius Client.

The core of the present invention is to utilize the system resources under the existing network structure, that is, the solution provided by the present invention can still realize the functions of quickly obtaining the MSISDN of the originating mobile terminal and performing positioning-related operations when the function of the network node changes. A second embodiment of the present invention is provided below.

Fig. 2 is a schematic diagram of the system structure of the second embodiment. In the second embodiment, the present invention implements SLP acquisition of the MSISDN number of the mobile terminal for originating positioning by extending the function of the Radius Client. Specifically, the corresponding relationship between the IMSI and the MSISDN of the mobile terminal is stored on the network entity as the RadiusClient, such as the GGSN, and the present invention still does not exclude the implementation of the SGSN. Based on the function expansion of Radius Client, compared with the first embodiment described above, no Radius Proxy (such as AAA server) is needed in the system structure, that is, the mobile network management subsystem described in this embodiment is GGSN; then Radius Client After receiving the positioning request message from the mobile terminal, it directly converts the IMSI to the MSISDN number; while the SLP still completes the function of the Radius Server. Specifically, referring to Fig. 2, the system includes Radius Client21 and Radius Server22.

Further referring to FIG. 2, the signaling flow under the system is described.

The originating location mobile terminal initiates a location request, and the request message carries the IMSI number of the terminal.

The local database of the network entity where the Radius Client is located saves the corresponding relationship between the IMSI and the MSISDN of all account-opening mobile terminals, and configures the corresponding relationship between the domain name of the mobile terminal and the IP address of the Radius Server. Convert the IMSI to the corresponding MSISDN. The Radius client can judge the message type sent by the mobile terminal through configuration. When it is judged that the message is a location request message, it will further send an authentication request message or an accounting request message to the RadiusServer based on the Radius protocol. The terminal's IP address and its MSISDN number are carried to the Radius Server. Same as the first embodiment of the present invention, the authentication request message and the accounting request message are Radius protocol messages; and the address of the Radius Server is configured as the IP address of the SLP.

After the Radius Server (SLP) receives the authentication request message or the accounting request message, it saves the corresponding relationship between the IP address of the mobile terminal carried in the message and the MSISDN, and returns a correct authentication response message or accounting response message.

After the Radius Client receives the authentication response message or the billing response message, it redirects the location request message of the mobile terminal to the SLP, the message includes the IMSI number of the mobile terminal for originating location, and the SLP obtains the message message The IP address of the originating location mobile terminal in the header, the SLP finds the corresponding MSISDN number in the local database according to the IP address, and executes the location operation according to the location request message.

The above provides two specific embodiments of the present invention, and their common feature is that the mobile terminal requests its own positioning operation. However, the present invention can further realize that the originating positioning terminal requests the positioning operation of other mobile terminals. The difference between it and the implementation method of the mobile terminal requesting self-location is that:

1) The positioning request message sent by the originating mobile terminal to the mobile network management subsystem includes the IMSI of the originating mobile terminal, and the identity of the target terminal (terminal requested for positioning), and may also include the positioning quality, and the positioning type may be The selected parameters can be set by those skilled in the art according to the specific needs of the business.

2) After the mobile network management subsystem obtains the authentication response message or billing response message of the positioning platform server; redirects the positioning request message of the originating mobile terminal to the positioning platform server, and the positioning platform server finds the originating mobile terminal according to the saved records. Locate the MSISDN corresponding to the IP address of the mobile terminal, and perform authentication/billing operations on the originating mobile terminal; the positioning platform server performs positioning operations on the terminal according to the identification of the target mobile terminal carried in the positioning request message. The identifier of the target mobile terminal is: IMSI or MSISDN.

Correspondingly, the present invention also provides a mobile terminal positioning system, including:

The gateway GPRS support node GGSN31 obtains the location request message of the first mobile terminal, sends to the AAA server an authentication request message or an accounting request message comprising the IMSI and IP address of the first mobile terminal; and obtains the authentication response message forwarded by the AAA server or After the charging response message, send the IP address of the first mobile terminal and a positioning request message including the IMSI to the positioning platform server;

The AAA server 32 is configured to search for the MSISDN corresponding to the IMSI of the first mobile terminal, and send an authentication request message or a charging request message including the MSISDN and IP address of the first mobile terminal to the positioning platform server; and, send the authentication response message of the positioning platform server Or the charging response message is forwarded to the GGSN;

The positioning platform server 33 is configured to store the correspondence between the MSISDN and the IP address in the authentication request message or the charging request message, and feed back the authentication response message or the charging response message; and, perform a positioning operation. Specifically, the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, and performs authentication and/or positioning operations on the first mobile terminal; or, the positioning request message further includes a second mobile terminal identifier; positioning The platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, performs authentication and/or charging operations, and performs positioning operations on the second mobile terminal according to the second mobile terminal identifier in the positioning request message. The identity of the second terminal is: IMSI or MSISDN.

In addition to the above system structure, another mobile terminal positioning system structure of the present invention includes:

The gateway support node GGSN obtains the location request message sent by the first mobile terminal, searches for the MSISDN number corresponding to the IMSI number of the first mobile terminal in the location request message, and sends an authentication request message including the MSISDN and IP address to the location platform server Or a charging request message; and, after obtaining the authentication response message or the charging response message of the positioning platform server, send the first mobile terminal IP address and the positioning request message including the IMSI to the positioning platform server;

The positioning platform server is used to save the correspondence between the MSISDN and the IP address of the first mobile terminal in the authentication request message or the charging request message, and feed back the authentication response message or the charging response message; and, perform a positioning operation. The authentication request message, authentication response message, accounting request message and accounting response message in the system of the present invention are Radius protocol messages of remote user dial-in authentication service.

A mobile terminal positioning method and system provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the present invention. method and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. Invention Limitations.

Claims (15)

1. A positioning method for a mobile terminal, characterized in that: 1) The first mobile terminal sends a positioning request message carrying its own International Mobile Subscriber Identity IMSI; 2) The mobile network management subsystem obtains the positioning request message, searches for the mobile terminal international ISDN number MSISDN corresponding to the first mobile terminal IMSI number in the positioning request message, and sends a message containing the first mobile terminal MSISDN and IP address to the positioning platform server. The service request message of the address; 3) The positioning platform server saves the corresponding relationship between the first mobile terminal MSISDN and the IP address in the service request message, and feeds back a service response message; 4) The mobile network management subsystem obtains a service response message, sends the location request message and the IP address of the first mobile terminal to the location platform server; 5) The positioning platform server executes the positioning operation. 2. The mobile terminal positioning method according to claim 1, wherein the positioning operation of the positioning platform server further comprises: Find the MSISDN corresponding to the IP address of the first mobile terminal, and perform an authentication operation on the first mobile terminal. 3. The mobile terminal positioning method according to claim 2, characterized in that: The location request message also includes a location protocol supported by the first mobile terminal and a current cell location identifier. 4. The mobile terminal positioning method according to claim 1, characterized in that: The positioning request message sent by the first mobile terminal further includes a second mobile terminal identifier, The positioning operation of the positioning platform server further includes searching for the MSISDN corresponding to the IP address of the first mobile terminal, performing an authentication operation, and performing a positioning operation on the second mobile terminal according to the second mobile terminal identifier in the positioning request message. 5. The mobile terminal positioning method according to claim 1, characterized in that: The mobile network management subsystem is a GPRS gateway support node GGSN. 6. The mobile terminal positioning method according to claim 1, characterized in that: The mobile network management subsystem includes a GPRS gateway support node GGSN and an AAA server; The GGSN acquires a location request message, and sends a service request message including the IMSI and IP address of the first mobile terminal to the AAA server; The AAA server searches for the MSISDN number corresponding to the IMSI number, and sends a service request message including the MSISDN and IP address to the positioning platform server. 7. The mobile terminal positioning method according to any one of claims 1 to 6, characterized in that: The service request message and the service response message are Radius protocol messages of the remote user dial-in authentication service. 8. The mobile terminal positioning method according to claim 7, characterized in that: The service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message. 9. A mobile terminal positioning system, characterized in that it comprises: The gateway GPRS support node GGSN obtains the location request message of the first mobile terminal, and sends a service request message including the IMSI and IP address of the first mobile terminal to the AAA server; and, after obtaining the service response message forwarded by the AAA server, sends the first mobile terminal The IP address and the positioning request message including the IMSI are sent to the positioning platform server; The AAA server is used to search for the MSISDN corresponding to the IMSI of the first mobile terminal, and sends a service request message including the MSISDN and IP address of the first mobile terminal to the positioning platform server; and forwards the service response message of the positioning platform server to the GGSN; The location platform server is used to save the correspondence between the MSISDN and the IP address in the service request message, and feed back a service response message; and, after obtaining the location request message of the GGSN, perform a location operation. 10. The mobile terminal positioning system according to claim 9, wherein the positioning operation of the positioning platform server further includes: The positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, and performs an authentication operation on the first mobile terminal. 11. The mobile terminal positioning system according to claim 9, characterized in that: The positioning request message further includes a second mobile terminal identifier; The positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, performs an authentication operation, and performs a positioning operation on the second mobile terminal according to the second mobile terminal identifier in the positioning request message. 12. The mobile terminal positioning system according to claim 9, characterized in that: The service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message. 13. A mobile terminal positioning system, characterized in that it comprises: The gateway support node GGSN obtains the location request message sent by the first mobile terminal, searches for the MSISDN number corresponding to the IMSI number of the first mobile terminal in the location request message, and sends a service including the MSISDN and IP address of the first mobile terminal to the location platform server request message; and, after obtaining the service response message of the positioning platform server, send the first mobile terminal IP address and a positioning request message including the IMSI to the positioning platform server; The location platform server is used to save the correspondence between the first mobile terminal MSISDN and the IP address in the service request message, and feed back a service response message; and, perform a location operation after obtaining the location request message of the GGSN. 14. The mobile terminal positioning system according to claim 13, characterized in that: The positioning request message further includes a second mobile terminal identifier; the positioning platform server searches for the MSISDN corresponding to the IP address of the first mobile terminal, performs an authentication operation, and authenticates the second mobile terminal according to the second mobile terminal identifier in the positioning request message. The terminal performs a positioning operation. 15. The mobile terminal positioning system according to claim 13 or 14, characterized in that: The service request message is an authentication request message, and the service response message is an authentication response message; or, the service request message is an accounting request message, and the service response message is an accounting response message.

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