CN1909719A - Method for positioning of mobile user cell - Google Patents

Abstract

The invention discloses a method for locating a cell of a mobile user, which comprises the following steps: collecting the interface data of No. 7 signaling; performing event synthesis on the collected data; correlating the interface events to obtain the mobile user TMSI and Correspondence between MSISDN; update the correspondence between TMSI and MSISDN through the TMSI reallocation message in the A interface event; obtain the TMSI number and the corresponding cell information from the event containing the location information on the A interface; compare the TMSI number with the cell’s The corresponding relationship and the corresponding relationship between TMSI and MSISDN are associated through the TMSI number, that is, the corresponding relationship between MSISDN and the cell is obtained, and thus the location information of the cell of the mobile user is obtained. The method of the invention effectively solves the problem of cell location for mobile users; the method has unified monitoring interface standards, complete considerations, centralized monitoring, and can be extended to the whole province or even the whole country for monitoring.

Description

A method for mobile user cell positioning

technical field

The invention relates to the field of mobile communication, in particular to a method for positioning a mobile user cell by monitoring the No. 7 signaling in the field of No. 7 signaling monitoring.

Background technique

The communication system in the prior art has been widely used in various fields of society, which has changed people's traditional life and work style, and the communication technology has also been rapidly developed under the impetus of people's needs. Among them, the operator customizes various personalized services according to the user's behavior attributes, which has been widely used.

At present, the technology of providing user location information through No. 7 signaling monitoring has the following aspects:

District SMS welcome. Its main working principle is to monitor the interface between VLR (Visitor Location Register, hereinafter referred to as VLR) and HLR (HomeLocation Register, hereinafter referred to as HLR) to obtain the user's cross-VLR behavior, so as to realize District SMS welcome. However, the minimum range it can locate is the area covered by the VLR, and it cannot distinguish the range of the cell level.

At present, there are community short message systems in operation, such as China Mobile's Shandong Mobile community short message system. Online access is limited to IMSI (International Mobile Subscriber Identity, that is, each mobile phone number corresponds to an IMSI number) number. Its advantage is that it is simple to implement, but its disadvantage is that it is not safe for users. Because the air interface uses IMSI numbers, it is not safe. Generally, TMSI (Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity, this number is Based on security considerations, the temporary number assigned by the exchange to the mobile phone user is a variable number, so the implementation technology of IMSI is not worth promoting.

At present, there are 2 public technical patents, one is called "Community SMS Publishing Method and Its Publishing Device", its patent application number is: 03112184.5, the applicant is Jinan Kaikai Technology Co., Ltd., and the other is called "Community SMS Release device, its patent application number is: 03216484.X, the applicant is Jinan Kaikai Technology Co., Ltd. The basic principle is to monitor the interface from BTS (Base Transceiver Station, hereinafter referred to as BTS) to BSC (Base Station Controller, Base Station Controller, hereinafter referred to as BSC), that is, Abis interface, plus A interface, C interface and D interface. The user's position is calculated through the position measurement information and other auxiliary information sent by the mobile phone user. Its advantage is accurate positioning, but its disadvantages are: first, Abis is an internal interface, and there is no unified protocol, so this technology is difficult to promote; second, the Abis interface has a huge amount of data and is widely distributed, and even its implementation is limited to In a small area, it cannot be monitored in a larger area such as the whole city or even the whole province.

Therefore, in view of the current situation, it is urgent to introduce a cell positioning method that can realize cell positioning, has a small monitoring range and standard interfaces, can monitor a large area, and has no impact on the main device.

Contents of the invention

The purpose of the present invention is to provide a cell location method for mobile users, which overcomes the shortcomings of the existing technology that either restricts the IMSI number of the A port, or monitors the Abis non-standard interface and cannot monitor in a wide range, and proposes an efficient , The cell positioning method that only needs to monitor the standardized links around MSC (Mobile Switching Center, hereinafter referred to as MSC), can realize the cell positioning of the whole province monitoring.

In order to achieve the above object, the present invention proposes a method for positioning a mobile user cell, which includes the following steps:

a: Collect the data of A interface, D interface, E interface and G interface of SS7;

b: Perform event synthesis on the collected data;

c: Correlate the A interface event, D interface event, E interface event and G interface event to obtain the corresponding relationship between the mobile user TMSI and MSISDN;

d: Through the TMSI reallocation message in the A interface event, extract the old and new TMSI numbers, and update the corresponding relationship between TMSI and MSISDN;

e: Obtain the TMSI number and the corresponding cell information from the event containing the location information on the A interface;

f: Associate the correspondence between the TMSI number and the cell in the step e and the correspondence between the TMSI and the MSISDN in the step d through the TMSI number, that is, obtain the correspondence between the MSISDN and the cell where the MSISDN is located, thereby obtaining the mobile User's cell location information.

Said method, wherein the events including location information in said step e include location update, calling, receiving/sending short messages.

The cell positioning method of the mobile user described in the present invention comprehensively and comprehensively considers the correlation characteristics between various protocol types from the system aspect, and proposes a unified and efficient method for extracting the corresponding relationship between the user MSISDN and the cell, thereby effectively The method solves the problem of cell location for mobile users; the monitoring interface standard of this method is unified, the consideration is complete, centralized monitoring can be performed, and there is no impact on the main equipment running on the existing network, and it can be extended to the whole province and even the whole country for monitoring.

Description of drawings

Fig. 1 is the flow chart of mobile subscriber cell location method described in the present invention;

Fig. 2 is the signaling connection schematic diagram when the user crosses the VLR location update of an implementation of the present invention;

Fig. 3 is the information association flowchart when the user crosses the VLR position update of an implementation of the present invention;

Fig. 4 is another implementation of the present invention, and the signaling connection schematic diagram of the mobile user calling out to the user outside the VLR in the network;

Fig. 5 is another implementation of the present invention, and the information association flow diagram of the user outside the VLR in the calling network when the mobile user initiates a call;

Fig. 6 is another implementation of the present invention, the signaling connection schematic diagram of the mobile user calling out to the user outside the network;

Fig. 7 is a flow chart of information association of a mobile user making a call to an off-network user according to another embodiment of the present invention.

Detailed ways

Various preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

A kind of method utilizing No. 7 signaling of the present invention to realize mobile subscriber cell location, the interface protocol involved mainly comprises: ISUP (Integrated Services Digital Network User Part, ISDN User Part, hereinafter referred to as ISUP), MAP (Mobile Application Part, Mobile Application Part, hereinafter referred to as MAP) and BSSAP (base station system application part, Base Station System Application Part, hereinafter referred to as: BSSAP). Among them, the ISUP protocol interface is mainly to monitor the call connection, and can obtain the calling user number and the called user number in the connection. If the called user is a mobile user, the called number may be the called roaming number. The MAP protocol interface is mainly to monitor location update events, send routing information events, and provide roaming number events. Correspondence, the correspondence between MSRN (Mobile Station Roaming Number, Mobile Station Roaming Number) and MSISDN. The Gsm A interface is mainly used to obtain the corresponding relationship between the user's TMSI and location information, and at the same time obtain the corresponding relationship between the calling number and the called number in the call. It can be seen that it is difficult to realize the user positioning requirement by monitoring one of the interfaces alone. Moreover, most of the BSSAP signaling uses the TMSI number, and it is impossible to directly obtain the corresponding relationship between the user's TMSI and MSISDN. Aiming at this current situation, the present invention proposes an efficient and general mobile user cell positioning method, which is suitable for using TMSI or IMSI for BSSAP signaling in the existing network. The corresponding relationship between TMSI and MSISDN can be associated through user behaviors such as mobile user location update, call origination, and call termination, so as to further realize cell positioning of mobile users.

As shown in Figure 1, it is a flow chart of the cell location method for mobile users, wherein the first step of signaling collection and the second step of event synthesis are consistent for the various situations realized by this patent, and the subsequent steps are different according to the user's behavior type. It's handled differently.

The following describes the implementation steps for different user behavior patterns.

1. User location update behavior across VLRs

In this part, its implementation principle is shown in Figure 2, which shows the simple process of updating the user's location across VLRs. The process is as follows:

1. The BSC where the user is located sends a location update request message to the MSC where the user is located;

2. After receiving the location update request message, the MSC where the user is located judges that the location is updated across VLRs, and sends identification signaling to the MSC where the user was originally located;

3. The original MSC where the user is located sends back an identification to the MSC where the user is located;

4 The MSC where the user resides feeds back the location update result to the BSC where the user resides.

The dotted line part in the figure is the monitored area of the present invention. The corresponding relationship between the user TMSI and IMSI can be obtained through the original TMSI number associated with the location update event of the A interface and the identification event of the G interface, and then according to other events of the A interface and the corresponding relationship between the MSISDN and the IMSI Cell location information of mobile users can be obtained.

The specific implementation steps are shown in Figure 3, and the steps are as follows:

1. First collect the data of No. 7 signaling;

2. Put the collected data into the analysis module for normal CDR/TDR (Call Detail Record/Transaction Detail Record, hereinafter referred to as CDR/TDR) synthetic analysis. For specific methods, refer to the patent "No. 7 Signaling Detailed Call Recording Event Synthesis Method", patent application number: 200310113550.6, publication number: 1545258; it is disclosed in the prior art, and will not be repeated here.

3. After the previous two steps are completed, the following three steps are processed in parallel:

3.1. Extract the corresponding relationship between the user's original TMSI and the current TMSI from the location update TDR of the A interface;

3.2. Extract the corresponding relationship between the user's original TMSI and IMSI from the TDR sent by the G interface;

3.3. Extract the corresponding relationship between user MSISDN and IMSI from the D interface location update event;

4. Through steps 3.2 and 3.3, IMSI searches and correlates the results of steps 3.2 and 3.3, and obtains the corresponding relationship between the user's original TMSI and MSISDN;

5. Through steps 3.1 and 4, the original TMSI is searched and associated with the results of steps 3.1 and 4, and the corresponding relationship between the user's current TMSI and MSISDN is obtained;

6. Extract the corresponding relationship between the original TMSI and the new TMSI from the TMSI reallocation event of the A interface, and update the corresponding relationship between the TMSI and the MSISDN according to the result of step 5;

7. Analyze other events containing location information on the A interface, such as periodic location update, normal location update, call origination, final call, text message sending, receiving text message, etc., and extract the user's current TMSI and its corresponding cell location information;

8. Search the result of step 6 through TMSI for the result of step 7, and obtain the user's MSISDN and the corresponding cell location information, thereby realizing the user's cell location.

2. A mobile user initiates a call to a user other than the VLR in the network

In this part, its realization principle is shown in Figure 4, and Figure 4 shows the simple process of a mobile user calling a user outside the VLR in the network, and the process is as follows:

1 The BSC where the user is located initiates a call message to MSC1;

2 MSC1 finds the HLR registered by the called party through the called number and sends a routing message to the HLR to obtain the route of the called user;

3 HLR will return the called route to MSC1, and inform the called user that he is now in MSC2;

4 MSC1 sends an origination message to MSC2, and connects the call to MSC2.

In the figure, the dotted line part is the monitored area of the present invention, through the called MSISDN and the called MSRN associating the A interface calling event, the E interface calling event and the D interface sending routing information event, thereby obtaining the corresponding relationship between the user TMSI and the MSISDN, According to other events of the A interface, the cell location information of the mobile user can be obtained. The specific implementation steps are shown in Figure 5, and the steps are as follows:

1. First collect the data of No. 7 signaling;

2. Put the collected data into the analysis module to carry out normal CDR/TDR synthesis analysis, and the specific synthesis method is the same as the first embodiment of the specific implementation mode;

3. After the previous two steps are completed, the following three steps are processed in parallel:

3.1. Extract the corresponding relationship between the user's latest TMSI and the called MSISDN from the call-out CDR of the A interface;

3.2. Extract the corresponding relationship between the calling MSISDN and the called MSRN from the E-interface calling CDR;

3.3. Extract the corresponding relationship between the called MSISDN and the called MSRN from the routing information TDR sent by the D interface;

4. Combine the results of the above steps 3.1, 3.2, and 3.3, and obtain the corresponding relationship between the calling user's current TMSI and MSISDN according to the association between the called MSISDN and the called MSRN;

5. Extract the corresponding relationship between the original TMSI and the new TMSI from the TMSI reallocation event of the A interface, update the result of step 4, and obtain the corresponding relationship between the user's latest TMSI and MSISDN;

6. Analyze other events containing location information on the A interface, such as periodic location update, normal location update, call origination, final call, text message sending, receiving text message, etc., and extract the user's current TMSI and its corresponding cell location information;

7. Search the result of step 5 through the TMSI for the result of step 6, and obtain the user's MSISDN and the corresponding cell location information, thereby realizing the user's cell location.

3. A mobile user initiates a call to an off-net user

In this part, its realization principle is shown in Figure 6, and Figure 6 shows the simple process of a mobile user making a call to a user outside the network, and the process is as follows:

1 The BSC where the user is located initiates a call message to MSC1;

2 MSC1 determines that it is an out-of-network call based on the called number, sends an origination message to MSC2 (in-network or off-network gateway office), and connects the call to MSC2.

The dotted line part in the figure is the monitoring area of the present invention, through the called number correlation A interface origination event and E interface origination event, thereby obtains the corresponding relation of user TMSI and MSISDN, then can obtain the sub-district of the mobile user according to other events of A interface location information. The specific implementation steps are shown in Figure 7, and the steps are as follows:

1. First collect the data of No. 7 signaling;

2. Put the collected data into the analysis module to carry out normal CDR/TDR synthesis analysis, and its specific synthesis method is the same as the first example of the specific implementation mode;

3. After the previous two steps are completed, the following two steps are processed in parallel:

3.1. Extract the corresponding relationship between the latest TMSI of the user and the number of the called user from the call-out CDR of the A interface;

3.2. Extract the corresponding relationship between the calling MSISDN and the called party number from the E interface call CDR;

4. Correlate the results of steps 3.1 and 3.2 through the called user number to obtain the corresponding relationship between the calling user's current TMSI and MSISDN;

5. Extract the corresponding relationship between the original TMSI and the new TMSI from the TMSI reallocation event of the A interface, update the result of step 4, and obtain the corresponding relationship between the user's latest TMSI and MSISDN;

6. Analyze other events containing location information on the A interface, such as periodic location update, normal location update, call origination, final call, text message sending, receiving text message, etc., and extract the user's current TMSI and its corresponding cell location information;

7. Search the result of step 5 through the TMSI for the result of step 6, and obtain the user's MSISDN and the corresponding cell location information, thereby realizing the user's cell location.

The present invention is not capable of associating the corresponding relationship between the MSISDN and the location of the cell for all A interface user events, and has certain limitations. First, one of the following actions must be performed to be able to correlate the corresponding relationship between the user MSISDN and the TMSI:

1 Outgoing call to outside the network, or outside the VLR in the network;

2 Incoming calls outside the network or outside the VLR in the network;

3 Cross-VLR position update;

4 After shutting down and restarting for a long time, the length of time depends on the effective time of the TMSI set by the switch.

That is to say, after adopting the method of the present invention to open the system, if the user does not have outside the network or outside this VLR in the network to call in, also does not have the phone to call out outside the network or outside this VLR in the network, and does not carry out If the cross-VLR location is updated without shutting down the device at the same time, the method of the present invention will not be associated with the corresponding relationship between the user's MSISDN and TMSI. But once there is one of the above behaviors, the method of the present invention can remember the corresponding relationship between the initial MSISDN and TMSI, and can maintain the corresponding relationship, which is an accumulative process.

With the corresponding relationship between MSISDN and TMSI, the following action trigger signaling is required to obtain the user's location information for positioning:

1 User power on/off action;

2 call in/out;

3 Receive text messages/send text messages;

4 Location update at location area level;

5 Periodic location update, this location update is automatically generated by the network side, and its frequency can be set on the switch.

As can be seen from the above description, when the method of the present invention is used in the initial state, the detection rate of the user's cell location is not high, and the detection rate is used to detect the probability of the relationship between the MSISDN and the cell location, but as time accumulates , its detection rate will gradually increase.

Although several specific embodiments of the method of the present invention have been described above in conjunction with the accompanying drawings, the method is not limited to the above specific embodiments, nor is it limited to the type of network monitored by SS7. The above specific implementation The method is only illustrative, not restrictive. Under the inspiration of this method, those skilled in the art can also make various possible deformations without departing from the purpose of this method and the scope of protection of the claims. , these should all fall within the protection of this method.

Claims (2)

1, the method for a kind of mobile user cell location, it may further comprise the steps:

A: to the A interface of Signaling System Number 7, D interface, the data of E interface and G interface are gathered;

B: the incident of carrying out of the data after gathering is synthesized;

C: to A interface incident, the D interface incident, the E interface incident is carried out related to obtain the corresponding relation of mobile subscriber TMSI and MSISDN with the G interface incident;

D: by the heavy assignment messages of the TMSI in the A interface incident, extract new and old TMSI number, upgrade the corresponding relation of TMSI and MSISDN;

E: from the A interface comprises the incident of positional information, obtain TMSI and corresponding district information with it;

F: the corresponding relation of the corresponding relation of the TMSI among the described step e and sub-district and TMSI in the described steps d and MSISDN is related by TMSI, promptly obtain the corresponding relation of the sub-district at MSISDN and this MSISDN place, thereby obtain mobile subscriber's location information of cell.

2, method according to claim 1 is characterized in that, the incident that comprises positional information among the described step e comprises the position renewal, calls out, and receives/send short messages.

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