CN100563275C - Monitor method - Google Patents

Abstract

The present invention relates to the communication technology, disclose a kind of monitor method, make same user's call can not monitored in twice triggering.Among the present invention, when receiving the calling of IAM Incoming, whether the calling subscriber who judges this calling the local subscriber, if then do not trigger monitoring, monitors if not just triggering.

Description

Monitor method

Technical field

The present invention relates to the communication technology, particularly the monitor method in the communication system.

Background technology

Time division multiple access (Time DivisionM ultiple Access, abbreviation " TDMA ") technology is that channel is divided into a succession of periodic time slot in time, each user's travelling carriage takies different time slots respectively and transmits, therefore irrelevant each other disturbing.Because this mode is to realize multiple access multiplexing with the mode that the time is cut apart, so be called time division multiple access.

The signal that the TDMA technology sends is to launch in the mode of burst, receive the signal of burst with the technology of time grate, and is therefore very strict to the requirement of synchro system.

In recent years, the Chinese Industrial Standards (CIS) tissue has been issued 900/1800MHz TDMA digital cellular mobile communication systems policing interface (lawful interception interface) technical specification.900/1800MHz TDMA digital cellular mobile communication systems are based on global system for mobile communications (Global System for mobile Communication, abbreviation " GSM ") carries out networking, briefly, it is by network and switching subsystem (Network and SwitchingSubsystem, abbreviation " NSS "), base station sub-system (Base Station Subsystem is called for short " BSS "), (the Operations ﹠amp of operation maintenance center; Maintenance Center is called for short " OMC "), mobile subscriber equipment, trunk and transmission equipment thereof form, its operating frequency is between 900～1800MHz.

In above-mentioned digital cellular mobile communication systems, policing interface (lawful interception interface) is used in real-time tracking and the monitoring of system's network element internal realization to all traffics of controlled number and non-traffic activity.Wherein, traffic and non-traffic activity comprise: switching in mobile platform started and shutdown, travelling carriage exhalation and incoming call traffic, the travelling carriage communication process, mobile station position update, the special clothes business of travelling carriage, travelling carriage transmitting-receiving short message, data communication, fax transmitting-receiving etc.The controlled type of number comprises: international comprehensive service digital net number (the MobileStation International Integrated Services Digital Network Number of travelling carriage, abbreviation " MSISDN "), international mobile station identity number (International Mobile Station Identity, abbreviation " IMSI "), international mobile equipment identification number (International Mobile Equipment Identity is called for short " IMEI ").

In above-mentioned digital cellular mobile communication systems, with office in return of mobile switching centre (Mobile SwitchingCenter, be called for short " MSC ").When networking, used the networking mode of OVERLAY.OVERLAY is meant at local exchange (for example MSC) do not have under the situation of SSP function, need route the call to a kind of networking mode of SSP office trigger intelligent business.

As shown in Figure 1, the message that wherein has a suffix 2 is and triggers the message that is reported to listening center after monitoring for the second time.Specify the process that twice triggering monitored below.

At first, to the real-time listening that the travelling carriage A of local exchange carries out traffic activity and voice, suppose that here travelling carriage A has IN service; Then, travelling carriage A makes a call, and calls out travelling carriage B, and travelling carriage A and travelling carriage B are at the MSC intra-office.After MSC/ VLR Visitor Location Register (Visitor LocationRegister, be called for short " VLR " ") is received call setup message, trigger and monitor,, and be established to the monitoring circuit of listening center IF3 to the IF2 of listening center interface reported event; Owing to need to trigger the IN service of travelling carriage A, go trigger intelligent business so need OVERLAY to be routed to SSP; After this, SSP is after the IN service that triggers travelling carriage A, and route is returned MSC/VLR, and for MSC/VLR, this is a new calling, and the calling subscriber is travelling carriage A, can trigger the monitoring of travelling carriage A once more like this, thereby causing triggering for the second time monitors.

As can be seen, above-mentioned monitoring scheme has two shortcomings:

The first, to same user's call, twice triggering monitored, and causes easily and obscures;

The second, twice triggering is monitored, and all will take the resource of listening center, causes the waste of resource.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of monitor method, makes same user's call can not monitored in twice triggering.

For achieving the above object, the invention provides a kind of monitor method, comprise following steps:

Switching equipment needs the calling of trigger intelligent business to be routed to the service switching point this when receiving the calling that needs trigger intelligent business;

Described SSP initiates the calling of Incoming to described switching equipment after the processing of finishing IN service, the calling of described Incoming is an initial address message;

When described switching equipment is received the calling of Incoming, judge whether the calling subscriber of the calling of this Incoming is the local subscriber, only when the calling subscriber of the calling of this Incoming is not the local subscriber, just trigger monitoring.

Wherein, the step of described triggering monitoring comprises following substep:

Described switching equipment is to the listening center reported event, and the monitoring circuit of foundation and listening center.

In this external described method, described switching equipment comprises mobile switching centre.

In this external described method, can be applicable to the digital tdma cell mobile communication systems.

By relatively can finding, the main distinction of technical scheme of the present invention and prior art is, when receiving the calling of IAM Incoming, whether the calling subscriber who judges this calling the local subscriber, if then do not trigger monitoring, if not just triggering monitoring.

Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly the condition judgment by increasing before triggering monitoring under the routing mode of OVERLAY, can effectively be avoided same user's twice triggering monitoring of call and repeated events are reported.Because the minimizing that repeats to monitor quantity, the resource of having saved mobile listening center guarantees that valuable resource is used on real effective the monitoring.

Description of drawings

Fig. 1 is that the OVERLAY networking mode is monitored schematic flow sheet down in the prior art;

Fig. 2 is that the OVERLAY networking mode of one better embodiment according to the present invention is monitored schematic flow sheet down.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 2, in a better embodiment of the present invention, the travelling carriage A of the IN service of having contracted makes a call to travelling carriage B, and travelling carriage A and travelling carriage B be at the MSC/VLR intra-office, and this MSC/VLR does not have the SSP function.

MSC/VLR triggers monitoring after receiving call setup message, reports " calling begins report " incident to the IF2 of listening center interface, and is established to the monitoring circuit of listening center IF3.After monitoring circuit was set up, MSC/VLR reported " passage is opened report " incident to the IF2 of listening center interface.Finished thus the monitoring of this calling has been prepared.

The IN service because travelling carriage A has contracted, and receive that the MSC/VLR that travelling carriage A calls out does not have the SSP function, go trigger intelligent business so need to use the OVERLAY mode to be routed to SSP.Specifically, MSC/VLR sends initial address message (Initial Address Message is called for short " IAM ") message to SSP, routes the call to SSP, and call out out this moment.

SSP finishes after the processing of IN service, will call out route by IAM message and return MSC/VLR, calls out Incoming again this moment.

Because by the IAM Incoming, the present invention has increased judgement to this type of incoming call, and promptly MSC/VLR judges whether the calling subscriber of this calling is the user of local exchange, if then do not trigger monitoring, monitors otherwise trigger.Because travelling carriage A is the user of this MSC/VLR, so do not trigger monitoring this moment.Avoided thus twice triggering monitoring of call and repeated events with travelling carriage A are reported.Since the minimizing that repeats to monitor quantity, the resource of having saved mobile listening center.

After this step and prior art identical done a simple declaration here.MSC/VLR sends the address to SSP and finishes message (Address Complete Message is called for short " ACM "), also responds ACM message after SSP handles accordingly.MSC/VLR sends to travelling carriage A with ALERTING message, and the user of travelling carriage A can hear ring back tone like this, and simultaneously, MSC/VLR reports " ring up report " incident to the IF2 of listening center interface.MSC/VLR sends response message (Answer Message is called for short " ANM ") to SSP, and SSP handles accordingly to also replying ANM to MSC/VLR.MSC/VLR sends connection message to travelling carriage A, reports " call answering report " incident to the IF2 of listening center interface simultaneously.After this converse between travelling carriage A and the travelling carriage B.MSC/VLR indication travelling carriage A disconnects and connecting behind the end of conversation, and is discharged into the monitoring circuit of listening center IF3.After monitoring circuit discharged and finishes, MSC/VLR reported " pathway closure report " incident and " call out and discharge report " incident to the IF2 of listening center interface.

In yet another embodiment of the present invention, the travelling carriage C of outer office makes a call to the travelling carriage A of local exchange, and after MSC/VLR received IAM message, the calling subscriber who judges this calling was not the local subscriber, monitors so trigger.The main distinction that this execution mode and existing outer office travelling carriage are called out the flow process of local exchange travelling carriage is, increased after the IAM message that MSC/VLR receives Incoming whether local subscriber's the judgement to the calling subscriber that calls out.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (4)

1. a monitor method is characterized in that, comprises following steps:

Switching equipment needs the calling of trigger intelligent business to be routed to the service switching point this when receiving the calling that needs trigger intelligent business;

Described SSP initiates the calling of Incoming to described switching equipment after the processing of finishing IN service, the calling of described Incoming is an initial address message;

When described switching equipment is received the calling of Incoming, judge whether the calling subscriber of the calling of this Incoming is the local subscriber, only when the calling subscriber of the calling of this Incoming is not the local subscriber, just trigger monitoring.

2. monitor method according to claim 1 is characterized in that, the step that described triggering is monitored comprises following substep:

Described switching equipment is to the listening center reported event, and the monitoring circuit of foundation and listening center.

3. monitor method according to claim 1 is characterized in that described switching equipment comprises mobile switching centre.

4. according to each described monitor method in the claim 1 to 3, it is characterized in that, be applied to the digital tdma cell mobile communication systems.

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