WO2004036930A1

WO2004036930A1 - Method of positioning the agps handset in mobile communication networks

Info

Publication number: WO2004036930A1
Application number: PCT/CN2003/000869
Authority: WO
Inventors: Yimin Li; Hong Sun; Qi Cheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2002-10-17
Filing date: 2003-10-17
Publication date: 2004-04-29
Also published as: CN1223227C; AU2003280531A1; CN1491060A

Abstract

A method of positioning the AGPS handset in the mobile communication networks, which comprises at least the step of: in response to the request of the client for positioning the handset, the mobile positioning service platform acquires the IP address of the mobile positioning equipment corresponding to the location of mobile switching center, which is visited by the AGPS handset, and obtains the user identification code of the AGPS handset as well; after that, mobile positioning service platform sends a request message for initiating the handset positioning to the mobile positioning equipment visited by the AGPS handset via a message interface; on receiving the acknowledge message from the mobile positioning device, the mobile positioning service platform send a request of initiating positioning short message to the mobile switching center visited by the AGPS handset; and the mobile switching center send a short message to the AGPS handset for triggering the positioning; AGPS handset sets up a connection with the visited mobile positioning equipment, as well as performing the information exchange and positioning calculation of the handset positioning; and the position information of the AGPS handset returns to the mobile positioning service platform via the network.

Description

Method for positioning AGPS mobile phone in mobile communication network TECHNICAL FIELD

The present invention relates to mobile communication network technology, and in particular, to a positioning method for an AGPS (Assisted Global Position System, referred to as AGPS, assisted satellite positioning system) mobile phone in a mobile communication network. Background technique

Through the cooperation between the mobile terminal and the mobile communication network equipment, the actual geographic location of the mobile user is determined. On this basis, the operator can provide various types of users with a variety of location-related value-added information services. To obtain the location information of the mobile terminal, different positioning technologies can be adopted according to different network types. Positioning technology can be divided into three categories, cell-based positioning, wireless signal measurement-based positioning, and GPS-based positioning. Each category can be divided into several specific positioning technologies. For example, cell-based positioning technologies include: CelllD, CelllD + TA, CelllD + RTT, CelllD + SectorlD, CelllD + SectorlD + TA, CelllD + SectorlD + RTT; Positioning technologies based on wireless signal measurement include: AFLT, GSM in CDMA networks / EOTD in / GPRS network, WCDMA

OTDOA; GPS-based positioning technologies include: terminal autonomous GPS positioning, terminal-based assisted GPS positioning, network-based assisted GPS positioning, and hybrid AGPS positioning. The hybrid AGPS positioning combines the two positioning technologies of AGPS and downlink wireless signal measurement, with the highest comprehensive cost performance, positioning accuracy and availability.

Hybrid AGPS positioning has two implementations based on the control plane and the user plane. The former uses signaling to exchange information required for positioning between the base station system, switching system, and positioning system. It has good security and real-time performance, but requires new network equipment such as MPC / GMLC :, PDE / SMLC, etc. A dedicated positioning interface is added to existing network equipment such as the Mobile Switch Center (MSC) and Home Location Register (HLR). Software for BSC, MSC, HLR and other equipment must be upgraded. The impact of the existing network is greater. User-based The implementation method is to use a short message to trigger the mobile phone to initiate a group call to a positioning device such as SMLC PDE. After the IP data channel is established, the end-to-end information exchange at the application layer between the mobile phone and the positioning device is completed, and the positioning information is collected and calculated. Finally The positioning result is reported by the mobile phone to the positioning business entity through a short message method. This approach has drawbacks in terms of security and real-time.

In terms of roaming positioning, the former reports the address of the mobile positioning center of the visited place to the HLR when the mobile phone updates the location, and then selects the corresponding positioning device according to the positioning technology by the mobile positioning center (MPC) of the visited place when positioning. This solution also needs to add new network equipment and interfaces, modify the location update messages of the MSC and HLR, and support new MAP operations, which also has a great impact on the network. In terms of roaming positioning based on the user plane, a centralized positioning device is used to construct the IP address of the positioning device in the mobile phone. This roaming positioning solution has great limitations.

The implementation based on the control plane requires the network to add a lot of new dedicated positioning interfaces. The BSC, MSC, and HLR must be upgraded, which has a greater impact on the existing network. The user plane-based implementation uses the short message method to start the positioning process and return the positioning results. There are serious shortcomings in terms of security and real-time. In terms of roaming positioning, the former adopts the method of adding new interfaces and modifying existing location update interfaces, which has too much impact on the existing network. The latter adopts the method of centrally building positioning equipment, which solidifies the IP address of the positioning device in the mobile phone. It is only applicable to mobile positioning devices using centralized networking. It is not compatible with the distributed networking of positioning networks. The positioning scheme is easy to form a performance bottleneck, and there are major limitations in flexibility. ,

In addition to the shortcomings mentioned above, which have a large impact on the existing network, poor security and real-time performance, and poor flexibility in roaming positioning solutions, the following problems also exist:

1. The positioning result reported by the mobile phone may be intentionally tampered by the end user.

2. The positioning-triggered short message is sent through the short message center. When the short message center adopts the store and forward mechanism, the problem that the positioning starts slowly will occur.

3. The positioning triggering short message is issued through the SMS center. The mobile positioning service platform cannot timely obtain the situation that the AGPS mobile phone cannot communicate and locate due to signal interruption, and cannot terminate the invalid positioning in time. Process, will cause a waste of system resources.

4. The positioning-triggered short message does not have a positioning confirmation mark, cannot provide a flexible privacy protection mechanism, and cannot provide the checked user with the right to be informed in a timely manner.

5. Mobile positioning service platforms, mobile positioning devices, and AGPS phones lack effective concurrent positioning response mechanisms, which is not conducive to effectively saving system overhead and improving business response speed. Summary of the Invention

In view of the shortcomings in the background art, an object of the present invention is to provide a method for positioning an AGPS mobile phone in a mobile communication network.

The invention includes at least the steps:

A. The mobile positioning service platform responds to the client's positioning request for the AGPS mobile phone, and obtains the IP address of the mobile positioning device corresponding to the location of the mobile switching center (MSC) where the AGPS mobile phone is visited and the identification code of the AGPS mobile phone user through the request inquiry;

B. The mobile positioning service platform sends a mobile phone positioning request message to the mobile positioning device in the place visited by the AGPS mobile phone through the message interface, and the message includes at least the mobile phone user identification code;

C. After receiving the confirmation message from the mobile positioning device, the mobile positioning service platform sends a short message to the mobile switching center (MSC) where the AGPS mobile phone visits;

D. The mobile switching center sends a short message that triggers positioning to the AGPS mobile phone;

E. The AGPS mobile phone establishes a connection with the mobile positioning device of the visiting place, and completes the information interaction and positioning calculation of the mobile phone positioning;

F. Return the position information of the AGPS mobile phone to the mobile positioning service platform through the network. '' According to the above technical solution:

The message interface is a TCP / IP message interface.

Step A further includes steps:

a. The mobile service platform authenticates the positioning request according to the positioning query authentication information registered by the AGPS mobile phone user; b. After the authentication is passed, obtain the information of the current mobile switching center (MSC) from the home location register of the AGPS mobile phone;

c Query the database to obtain the IP address of the mobile positioning device corresponding to the location of the Mobile Switching Center (MSC) and the identification number of the AGPS mobile phone user.

Step D further includes steps:

aAGPS mobile phone initiates a group call to the mobile positioning device according to the IP address of the mobile positioning device in the short message, which includes the identification number of the mobile phone user;

b. The mobile positioning device receives the positioning packet call request from the AGPS mobile phone, and compares whether the user identification code in the request message is the same as the user identification code sent by the mobile positioning service platform. If the user identification code is different, the location connection request is rejected. Continue to step c;

c. The mobile phone and the mobile positioning device exchange the information required for hybrid AGPS positioning, and perform positioning calculations.

Step E is that the mobile positioning device reports the positioning result to the mobile positioning service platform.

Step E may also report the positioning result to the mobile positioning service platform for the AGPS mobile phone, including the steps: a. The mobile positioning device encrypts the positioning result and returns it to the AGPS mobile phone;

The change center (MSC) sends to the short message center, where the location information is in encrypted form;

c. The short message center forwards the positioning result to the mobile positioning service platform;

d. The mobile positioning service platform decrypts the received positioning results and saves them in the user's location letter history list for future use.

Before the completion of a positioning process, the mobile positioning device receives a positioning request for the same user, and directly reports to the mobile positioning service platform that initiated the two positioning requests according to the results of the ongoing positioning process; If a positioning request is received and a second legal positioning request is received from the mobile positioning service client before the positioning result is obtained, the second positioning request is directly responded to according to the ongoing positioning result.

The technical solution of the present invention can achieve at least the following effects: 1. Reporting the positioning result from the mobile phone in an encrypted manner or directly reporting the positioning result by the mobile positioning device on the network side prevents the intentional tampering of the position information by the end user.

2. The positioning-triggered short message is sent directly to the MSC without going through the short message center: This ensures the fast start of the positioning. Process. When the AGPS mobile phone cannot communicate and locate due to a signal interruption, the mobile positioning center can timely obtain the situation where the positioning triggers the short message delivery failure and terminate the invalid positioning process in time, saving system resources.

3. The mobile positioning center issues the Π> address of the mobile positioning device in the positioning trigger short message, which ensures the compatibility of the positioning network to the distributed networking and avoids the evolution from the centralized networking to the distributed networking. Existing mobile phones cannot locate the situation.

4. The privacy protection mechanism that contains the positioning confirmation mark in the positioning trigger short message guarantees that the investigated user has the right to know his location in time, and further protects the security of the user.

5. The concurrent positioning response mechanism of the mobile positioning center, mobile positioning device and AGPS mobile phone effectively saves system overhead and improves business response speed.

6. With the method of the present invention, only minor changes to the existing network can be used to improve security and real-time performance, and make roaming positioning flexible. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a networking diagram of the present invention;

FIG. 2 is a flowchart implemented by the present invention;

FIG. 3 is another flowchart implemented by the present invention. detailed description

Refer to the networking diagram of the present invention shown in FIG. 1.

The technical solution of the present invention is a mobile positioning service platform (such as: Location Server Middleware (LBS MW), MPC or Gateway Mobile Location Center (GMLC)) and a mobile positioning device (such as: positioning entity (PDE), serving mobile location center). (SMLC)) to establish a TCP / IP message interface, and move The positioning device accepts the request from the mobile positioning service platform, completes the information interaction and positioning calculation process of the mobile positioning, and returns the location information of the mobile phone to the mobile positioning service platform through the network security. Solve the problem of unreliable reporting of location information from mobile phones (because the positioning results are considered to be safe when transmitted in the operator's private network, and the positioning results are sent to the terminal in clear text, and then reported by the terminal, there are interceptions and modifications by users may). In addition, after the mobile positioning device (such as PDE or SMLC) accepts the positioning request reported by the mobile positioning service platform or the mobile phone, after completing the mobile phone positioning information interaction and positioning calculation process, the mobile phone's position information is encrypted and transmitted to the mobile phone. The encrypted location information is reported to the positioning service platform (LBS MW, MPC, GMLC, or SP), and the positioning service platform decrypts to obtain the mobile phone location information. The positioning result is sent to the terminal in an encrypted manner, and then reported by the terminal, there is no longer the problem of being intercepted and modified by the user, and the problem of fraudulent location information can also be solved.

In order to solve the problem of roaming positioning during the construction of mobile positioning device distribution, when the mobile positioning service platform notifies the mobile phone to start the positioning process, it queries the HLR to obtain the information of the mobile phone's visited place, determines the ΓΡ address of the mobile positioning device corresponding to the visited place, and Send the IP address to the mobile phone in the trigger short message.

Safe and reliable positioning includes two methods: mobile phone reporting encrypted positioning results and mobile positioning device reporting positioning results.

Example 1

The following is a detailed description with reference to FIG. 2, where the mobile service platform is specifically a mobile positioning center, and the positioning result is provided by the mobile positioning device to the mobile positioning service platform:

1. The mobile positioning service platform receives the positioning request from the mobile positioning service client to the mobile phone, and the mobile positioning service platform authenticates the positioning based on the positioning query authentication information registered by the investigated user. After the authentication is passed, the positioning process of the mobile phone is started. First ask the HLR of the investigated user to query the MSC information of the visited user ’s current location. In CDMA network, this message can be SMSREQ message, SEARCH or LPREQ. In GS / GPRS / WCDMA network, it can be SRI-SM, ATI or SRI-LCS.

2. The HLR receives the request from the mobile positioning service platform to query the MSC address of the user, and returns A response message is returned, which includes the address information of the MSC where the checked mobile phone is currently located. This information can be used for short message routing.

3. The mobile positioning service platform receives the MSC address information returned by the HLR, queries the database to obtain the IP address of the mobile positioning device corresponding to the MSC location and the mobile phone user's identification number (MSI or MIN), and sends the mobile positioning device to the mobile phone's visited location. Initiate a positioning request. The request message contains the identification number of the mobile phone user.

The mobile positioning service platform can obtain the IP address of the mobile positioning device corresponding to the location of the MSC where the mobile phone is visited. You can use three methods: query the local MSC number / mobile positioning device IP address correspondence table, or query the HLR, or use the dedicated The database device can be queried. The mobile positioning service platform can also obtain the mobile phone user's identification number (MSI or MN) in three ways: query the local user number / user identification number correspondence table, query the HLR or query the camp account center.

4. The mobile positioning device receives the positioning request, stores the identification number of the mobile phone user, returns a confirmation message, and waits to initiate a positioning connection request.

5. The mobile positioning service platform receives the confirmation message, and sends a positioning short message request to the MSC where the mobile phone is visiting. In a CDMA network, this message is SMDPP, and in a GSM GPRS WCDMA network, it is an MT-FWD-SM (Mobile Termination Forward Short Message) message; the content of this short message is specially customized, including the IP address and Short messages show signs and positioning confirmation messages or signs.

6. The MSC sends a short message that triggers positioning to the mobile phone.

7. The mobile phone receives the short message and sends a response message to the MSC.

8. The MSC returns a sending response message that triggers a positioning short message to the mobile positioning service platform.

If the mobile phone user needs to confirm this positioning, the MSC will receive a confirmation short message from the mobile phone to allow or reject the positioning. At this time, the MSC will forward the short message to the mobile positioning service platform through the short message center. The sending process of the confirmation short message is omitted in the flowchart.

9. The mobile phone initiates a group call to the mobile positioning device according to the IP address of the mobile positioning device included in the short message that triggers the positioning, including the mobile phone user's identification number (MSI or MIN). If the display mark in the content of the start positioning short message is to be displayed, the mobile phone displays the short message, otherwise it is not displayed; if the short message contains a position confirmation mark that needs to be confirmed, the confirmation information is displayed, and before the positioning group call is initiated, Waiting for user confirmation. After the user confirms, the mobile phone will send another confirmation short message to the mobile positioning service platform. The result of the confirmation is consent to location or rejection of the location; if no confirmation or confirmation is required to agree to location, a positioning group call is initiated; otherwise, no positioning group call is initiated. The sending process of the confirmation short message is omitted in the flowchart.

10. The mobile positioning device receives a positioning group call request from the mobile phone, and compares whether the user identification number in the request message is the user number required for positioning by the mobile positioning service platform. Otherwise, the positioning connection request is rejected, or the positioning request is accepted. And return a confirmation message to the phone.

11. The mobile phone and the mobile positioning device exchange information required for hybrid AGPS positioning, and perform positioning calculations.

12. After the positioning is completed, the mobile positioning device sends a positioning connection release message to the mobile phone to end the positioning process.

13. The mobile positioning device reports the positioning result to the mobile positioning service platform, which includes location information such as the latitude and longitude of the mobile phone.

14. The mobile positioning service platform receives the positioning result report message and returns a confirmation message to the mobile positioning device; the mobile positioning device releases resources related to the positioning.

If a mobile positioning device receives a positioning request for the same user before the completion of a positioning process, it is not necessary to start another positioning resource, but directly reports to the mobile positioning service platform that initiated the second positioning request according to the results of the ongoing positioning process . If the mobile positioning service platform initiates a positioning request and receives a positioning result and receives a second legal positioning request from the LCS-Client, there is no need to start another positioning resource, and the two LCSs are directly based on the ongoing positioning results. -Client responds to positioning request.

Example 2

Referring to Figure 3, the positioning result is reported to the mobile positioning service platform by the mobile phone:

Steps 1 to 11 are the same as those in the first embodiment. 12. After the positioning is completed, the mobile positioning device encrypts the positioning result and returns it to the mobile phone, and releases the resources occupied by the positioning.

13. The mobile phone reports the positioning result to the mobile positioning service platform. The positioning result is sent as a short message to the short message center through the MSC, where the location information is in encrypted form.

14. After receiving the positioning result report short message, the short message center returns a confirmation message to the mobile phone through the MSC, and saves the short message for forwarding to the mobile positioning service platform. · If the mobile phone receives another valid positioning request before a positioning process is completed, the mobile phone does not initiate a positioning group call separately, but responds to the latter request according to the result of the ongoing positioning.

15. The short message center forwards the positioning result to the mobile positioning service platform.

16. After receiving the positioning result, the mobile positioning service platform returns a confirmation message to the short message center, and the short message center deletes the saved short message of the positioning report. The mobile positioning service platform decrypts the positioning results and saves them in the user's location information history list for later use.

The above are only the preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed by the present invention. Replacement should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

Claim

1. A method for positioning an AGPS mobile phone in a mobile communication network, which is characterized in that it includes at least the following steps:

A. The mobile positioning service platform responds to the client's positioning request for the AGPS mobile phone, and obtains the IP address of the mobile positioning device corresponding to the location of the mobile switching center (MSC) visited by the AGPS mobile phone and the identification code of the AGPS mobile phone user through various inquiries.

F. Return the position information of the AGPS mobile phone to the mobile positioning service platform through the network.

2. The method according to claim 1, wherein: the message interface is a TCP / IP message interface.

3. The method according to claim 1, wherein: step A further comprises the steps of: a. The mobile service platform authenticates the positioning request according to the positioning information registered by the AGPS mobile phone user;

b. After the authentication is passed, obtain the information of the current mobile switching center (MSC) from the home location register of the AGPS mobile phone;

c. Query the database to obtain the IP address of the mobile positioning device corresponding to the location of the Mobile Switching Center (MSC) and the identification code of the AGPS mobile phone user.

4. The method according to claim 1, characterized in that: step E further comprises the steps of: a. The AGPS mobile phone initiates a group call to the mobile positioning device according to the IP address of the mobile positioning device in the short message, and the call request message is Include the identification code of the mobile phone user; b. The mobile positioning device receives the positioning packet call request from the AGPS mobile phone, and compares whether the user identification code in the request message is the same as the user f and other codes sent by the mobile positioning service platform. If the user identification code is different, the positioning connection request is rejected, and the same is established. Connect and continue to step c;

5. The method according to claim 1, characterized in that: step F refers to reporting the positioning result by the mobile positioning device to the mobile positioning service platform.

6. The method according to claim 1, characterized in that: step F refers to the positioning result from the AGPS mobile phone to the mobile positioning service platform, and comprises the step of:

a. The mobile positioning device encrypts the positioning result and returns it to the AGPS mobile phone;

b. The AGPS mobile phone sends the positioning result as a short message to the short message center through the visited mobile switching center (MSC), where the location information is in an encrypted form;

d. The mobile positioning service platform decrypts the received positioning results and saves them in the user's location information history list for future use.

7. The method according to any one of claims 1 to 6, characterized in that: before a positioning process is completed, the mobile positioning device receives a positioning request for the same user again, and directly reports it to the result of the ongoing positioning process. Mobile positioning service platform that initiates the second positioning request.

8. The method according to any one of claims 1 to 6, wherein: before the mobile positioning service platform initiates a positioning request and obtains a positioning result, and receives a second legal positioning request from the mobile positioning service client, then Directly respond to the two positioning requests based on the ongoing positioning results.

9. The method according to claim 1, characterized in that: when the location-triggered short message triggered in step C includes a positioning confirmation mark that needs to be confirmed, the AGPS mobile phone displays confirmation information and waits for user confirmation before initiating a positioning group call. ; If the result of the confirmation is that the location is agreed to, a location branch call is initiated; otherwise, a location group call is not initiated.