CN1728742A

CN1728742A - Method for implementing unreachable back call service

Info

Publication number: CN1728742A
Application number: CN 200410070219
Authority: CN
Inventors: 舒续祖
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-07-30
Filing date: 2004-07-30
Publication date: 2006-02-01

Abstract

The method includes steps: (1) calling party of mobile user calls the called party of mobile user, if the called mobile user is unreachable at this moment, then mobile switching center of the calling party determines whether the calling party activates service of unreachable back call; (2) after activating the said service, calling party informs the mobile switching center of the called party to monitor state of the called mobile user; (3) when the mobile switching center of the called party has detected available wireless interface of the called party, mobile switching center of the calling party informs the calling party to invoke unreachable back call service; (4) the calling party calls unreachable back call service; the mobile switching center of the calling party builds unreachable back call. The invention provides unreachable back call service for mobile user and business opportunity for operation manager.

Description

A kind of implementation method of unreachable back call service

Technical field

The present invention relates to the callback technology in global system for mobile communications (GSM) and Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, relate in particular to a kind of implementation method of unreachable back call service.

Background technology

GSM and WCDMA are present widely used two kinds of networks.Wherein GSM can also provide following supplementary service and IN service except providing such as voice call, short message and urgent call etc. interior basic telecommunications business:

1. caller ID display: i.e. caller identification, be meant that GSM mobile handset is dialed after, for the client provides a kind of business function that shows the telephone number make a call, whether the client can select to receive calls as required.

2. calling number refuses to show: the client refuses display function if be provided with to call out when another mobile phone of own mobile phone dialing, even then the other side's mobile phone has the function of caller ID display, and phone number that still can't display of calling side.

3. calling transfer: the client in the future electrotransfer to communication mediums such as landline telephone, beeper, voice mail, secretary's platforms.Transfering type comprises that transfer on no reply, unreachable transfer, shutdown or out of reach shift and shift all incoming calls etc.

4. Call Waiting: the client if there is new calling to arrive, can select whether to answer, refuse or ignore this calling in communication process.

5. call out to keep: this function can make the client when conversing with the other side, under the situation that the other side holds the line, replys or notifies the third party to send a telegram here, and can switch mutually in two square tubes words simultaneously.

6. MPTY: client two sides are when conversation, and the third party adds conversation if desired, and then the client can set aside at the state of dropped calls not and be the third party, thereby realizes that the three parts converses simultaneously or converses with each side respectively.

7. call blocking: the client can be provided with the restriction of various exhalation, incoming call as required.This service allows the client arbitrarily to control the calling authority of mobile phone, prevent by people's mistake beat, telephoning illegally, avoid unnecessary loss.

WCDMA is except whole business that GSM can be provided, also increased the location service that comprises zone registration, mobile yellow pages and urgent location etc., and the multimedia service that comprises circuit type real-time multimedia business, packet-type real-time multimedia business and non real-time storage forward type multimedia messaging service, MMS etc.

No matter be GSM network or WCDMA network, when the caller mobile subscriber called out the callee, if the callee is unreachable, then this time A can't finish the calling of B.The unreachable B of being meant of described callee is connected interruption with wireless channel between the network, for example: do not carry A to B make a call wireless channel Assignment Failure that no-response paging that the broadcasting of information causes, network carry out to the calling of B at A and user's shutdown etc. owing to what B received that cell base station sends.Usually under called untouchable situation, the callee can transfer to other users on another user C to the calling that B initiates by setting in advance the mode of calling transfer, and the user C here can be the fixed telephone subscriber, also can be the mobile subscriber.This kind callee has following shortcoming with the calling transfer that wireless channel between the network is connected under the interruption situation:

1. the callee transfers the call on another user C, owing to user and C distance spatially and the reasons such as conversation of user C self, calling transfer can not guarantee to accept that the caller mobile subscriber calls out must be the callee, thereby all makes troubles for A, B, C three parts;

2. because calling transfer is the callee is provided with knowing under self untouchable prerequisite, and B do not know self can't the situation of call accepted under, as mobile phone because of the not enough shutdown automatically of electric weight etc., then the callee can't set in advance calling transfer, thereby other users can't finish to the calling that B initiates;

3. because the unreachable of callee makes other users all can't directly finish to the calling that B initiates, then the profit of operator can corresponding minimizing.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of unreachable back-calling method, under the untouchable situation of callee, in case callee's wave point can be used, network just couples together calling and called.

For achieving the above object, the invention provides the implementation method of the unreachable back call service in a kind of GSM and the WCDMA system, this method may further comprise the steps:

A. the caller mobile subscriber calls out the callee by calling mobile exchanging center and called mobile switching centre, if this moment, the callee was unreachable, then calling mobile exchanging center determines whether the caller mobile subscriber activates unreachable back call service;

B. after the caller mobile subscriber activated unreachable back call service, calling mobile exchanging center was notified the called monitoring callee of mobile switching centre state;

But C. monitor callee's the wave point time spent when called mobile switching centre, report to calling mobile exchanging center, calling mobile exchanging center initiates a call to the caller mobile subscriber, and notice caller mobile subscriber calls unreachable back call service;

If D. the caller mobile subscriber calls unreachable back call service, calling mobile exchanging center couples together caller mobile subscriber and callee's calling, sets up unreachable back-calling and calls out.

Described steps A may further comprise the steps:

A01. caller mobile subscriber's travelling carriage and calling mobile exchanging center/Visited Location Registor connect;

A02. calling mobile exchanging center/Visited Location Registor sends to gateway MSC with callee's Subscriber Number;

A03. gateway MSC is to called attaching position register request callee's roaming number, called attaching position register by with the mutual roaming number that obtains the callee of mobile switching centre/Visited Location Registor of callee, then, called attaching position register returns to gateway MSC with callee's roaming number again;

A04. gateway MSC routes the call to called mobile switching centre/Visited Location Registor according to callee's roaming number;

A05. it is unreachable that called mobile switching centre/Visited Location Registor detects the callee, then notifies the gateway MSC callee unreachable and called network support unreachable back call service;

A06. gateway MSC is notified calling mobile exchanging center/Visited Location Registor callee unreachable and called network support unreachable back call service, calling mobile exchanging center/Visited Location Registor notice caller mobile subscriber's the unreachable and called network support unreachable back call service of travelling carriage callee, and whether definite caller mobile subscriber activates unreachable back call service.

Steps A 02 described calling mobile exchanging center/Visited Location Registor with the method that callee's Subscriber Number sends to gateway MSC is: calling mobile exchanging center/Visited Location Registor sends the initial address message of the roaming number that carries the callee to gateway MSC;

Steps A 03 described gateway MSC to the method for called attaching position register request callee's roaming number is: gateway MSC sends information request message to called attaching position register;

Steps A 03 described called attaching position register by the mutual detailed process that obtains callee's roaming number with mobile switching centre/Visited Location Registor of callee is: called attaching position register is to mobile switching centre/Visited Location Registor transmission of callee message that Provides Roaming Number, and called mobile switching centre/Visited Location Registor is carried on callee's roaming number and returns to called attaching position register in the roaming number message;

Steps A 03 described called attaching position register with the method that callee's roaming number returns to gateway MSC is: called attaching position register sends information request response message to gateway MSC;

The method that steps A 04 described gateway MSC routes the call to called mobile switching centre/Visited Location Registor is: gateway MSC sends initial address message to called mobile switching centre/Visited Location Registor, and described initial address message carries callee's Subscriber Number;

Steps A 05 described called mobile switching centre/Visited Location Registor notice gateway MSC callee method unreachable and called network support unreachable back call service is: called mobile switching centre/Visited Location Registor sends release message to gateway MSC, and puts former because the callee is unreachable and called network is supported unreachable back call service at release message acceptance of the bid note;

Steps A 06 described gateway MSC notice calling mobile exchanging center/Visited Location Registor callee method unreachable and called network support unreachable back call service is: gateway MSC sends release message to calling mobile exchanging center/Visited Location Registor, and marks the unreachable and called network support unreachable back call service of callee in release message;

Steps A 06 described calling mobile exchanging center/Visited Location Registor notice caller mobile subscriber's travelling carriage callee method unreachable and called network support unreachable back call service is: calling mobile exchanging center/Visited Location Registor sends release message to caller mobile subscriber's travelling carriage, and marks the unreachable and called network support unreachable back call service of callee in release message.

Adopt the supplementary service mode to realize unreachable back-calling, the pre-first to file unreachable back call service of caller mobile subscriber, and set up the CAMEL-Subscription-Information of unreachable back call service, the CAMEL-Subscription-Information of this unreachable back call service leaves in caller mobile subscriber's the attaching position register, and in the caller mobile subscriber starts shooting back or roam procedure, be inserted in the mobile switching centre/Visited Location Registor of the current correspondence of caller mobile subscriber, then described step B may further comprise the steps:

B11. caller mobile subscriber's travelling carriage is to calling mobile exchanging center/Visited Location Registor requesting activation unreachable back call service; This unreachable back-calling activates request through calling mobile exchanging center/Visited Location Registor and caller attaching position register, is delivered to called attaching position register;

B12. called attaching position register is indicated the called monitoring callee's of mobile switching centre state, and then called mobile switching centre begins to monitor callee's state and notifies called attaching position register to begin to monitor;

B13. called attaching position register is activated by caller attaching position register and calling mobile exchanging center/Visited Location Registor notice caller mobile subscriber's travelling carriage unreachable back call service.

The method that step B11 described request activates unreachable back call service is: caller mobile subscriber's travelling carriage sends unreachable back-calling to calling mobile exchanging center/Visited Location Registor and activates request message, this unreachable back-calling activates request message through calling mobile exchanging center/Visited Location Registor and caller attaching position register, is delivered to called attaching position register.

The detailed process of described step B12 is: called attaching position register will begin report message and send to called mobile switching centre/Visited Location Registor, indicate the called monitoring callee's of mobile switching centre state, then called mobile switching centre will begin to report that response message returns to called attaching position register, and begin to monitor callee's state.

The detailed process of described step B13 is: called attaching position register activates response message with unreachable back-calling and sends to the caller attaching position register, and then this unreachable back-calling activates response message passes to the caller mobile subscriber through caller attaching position register and calling mobile exchanging center/Visited Location Registor travelling carriage.

The method of the described requesting activation unreachable back call service of step B11 further comprises:

The caller attaching position register is carried on callee's service code in the unreachable back-calling activation request message, passes to called attaching position register.

Adopt the supplementary service mode to realize unreachable back-calling, then described step C may further comprise the steps:

C11. called mobile switching centre/Visited Location Registor monitors callee's wave point and can use, and then indicates called attaching position register callee's this moment to reach;

C12. called attaching position register is through the caller attaching position register, and indication calling mobile exchanging center/Visited Location Registor callee can reach;

C13. after calling mobile exchanging center/Visited Location Registor sent to caller mobile subscriber's travelling carriage with caller mobile subscriber's call information, caller mobile subscriber's travelling carriage returned the response at this call information;

C14. calling mobile exchanging center/Visited Location Registor notice caller travelling carriage can be set up unreachable back call service, and notice caller mobile subscriber sets up and the calling relation of callee's unreachable back-calling.

The method that the described called mobile switching centre/Visited Location Registor of step C11 indicates called attaching position register callee's this moment to reach is: called mobile switching centre/Visited Location Registor sends event report message to called attaching position register, and described event report message carries callee's wave point information available;

The detailed process of described step C12 is: called attaching position register sends to calling mobile exchanging center/Visited Location Registor with the remote subscriber available message through the caller attaching position register;

The method that the described calling mobile exchanging center of step C14/Visited Location Registor notice caller travelling carriage can be set up unreachable back call service is: calling mobile exchanging center/Visited Location Registor send unreachable back-calling again message related to calls to caller mobile subscriber's travelling carriage.

Adopt the supplementary service mode to realize unreachable back-calling, then described step D may further comprise the steps:

D11. the caller mobile subscriber sets up unreachable back-calling to calling mobile exchanging center/Visited Location Registor request;

D12. unreachable back-calling is set up in calling mobile exchanging center/Visited Location Registor notice caller location register caller this moment mobile subscriber request, simultaneously, the caller attaching position register is according to caller mobile subscriber's call request, and caller mobile subscriber's Subscriber Number is sent to gateway MSC;

D13. once more to called mobile switching centre/Visited Location Registor request callee's roaming number, called mobile switching centre/Visited Location Registor returns to gateway MSC with callee's roaming number to gateway MSC through called attaching position register;

D14. gateway MSC sends to called mobile switching centre/Visited Location Registor with callee's roaming number, and called then mobile switching centre/Visited Location Registor and callee connect;

D15. called mobile switching centre/Visited Location Registor has been set up the connection of unreachable back-calling through gateway MSC notice calling mobile exchanging center/Visited Location Registor callee;

D16. calling mobile exchanging center/Visited Location Registor and caller mobile subscriber's travelling carriage connects, the success of unreachable back-calling call setup;

D17. called mobile switching centre/Visited Location Registor is through called attaching position register, notice caller attaching position register unreachable back-calling access success, calling mobile exchanging center/Visited Location Registor notice caller attaching position register unreachable back-calling access success, called attaching position register indicates called mobile switching centre/Visited Location Registor to stop to report callee's state.

The method that unreachable back-calling is set up in the described calling mobile exchanging center of step D12/Visited Location Registor notice caller location register caller this moment mobile subscriber request is: calling mobile exchanging center/Visited Location Registor sends the remote subscriber available message of unreachable back-calling to the caller attaching position register;

The described caller attaching position register of step D12 with the method that caller mobile subscriber's Subscriber Number sends to gateway MSC is: the initial address message that the caller attaching position register is called out unreachable back call service sends to gateway MSC, and described initial address message carries caller mobile subscriber's Subscriber Number;

The detailed process of described step D13 is: gateway MSC sends the information request message of unreachable back-calling calling to called attaching position register, ask called roaming number once more, called attaching position register sends and Provides Roaming Number message to called mobile switching centre/Visited Location Registor, and called mobile switching centre/Visited Location Registor returns callee's roaming number and gives called attaching position register; Then, called attaching position register returns to gateway MSC with callee's roaming number in information request response message;

The described gateway MSC of step D14 with the method that callee's roaming number sends to called mobile switching centre/Visited Location Registor is: gateway MSC sends initial address message to called mobile switching centre/Visited Location Registor, and described initial address message carries callee's roaming number;

The described called mobile switching centre of step D15/Visited Location Registor through the method that gateway MSC notice calling mobile exchanging center/Visited Location Registor callee has set up the connection of unreachable back-calling is: called mobile switching centre/Visited Location Registor sends acknowledgement message to gateway MSC; Gateway MSC passes to calling mobile exchanging center/Visited Location Registor with acknowledgement message;

The method that described calling mobile exchanging center/Visited Location Registor of step D16 and caller mobile subscriber's travelling carriage connects is: calling mobile exchanging center/Visited Location Registor sends the travelling carriage of prompting/connection message to the caller mobile subscriber;

The described called mobile switching centre of step D17/Visited Location Registor is through called attaching position register, the method of notice caller attaching position register unreachable back-calling access success is: called mobile switching centre/Visited Location Registor send unreachable back-calling call out report message to called attaching position register after, called attaching position register is called out unreachable back-calling to report message and is sent to the caller attaching position register;

The method of the described calling mobile exchanging center of step D17/Visited Location Registor notice caller attaching position register unreachable back-calling access success is: calling mobile exchanging center/Visited Location Registor sends unreachable back-calling and calls out report message to the caller attaching position register.

Adopt the IN service mode to realize unreachable back call service, then this method further comprises: the pre-first to file unreachable back call service of caller mobile subscriber, and set up the CAMEL-Subscription-Information of unreachable back call service, the CAMEL-Subscription-Information of this unreachable back call service leaves in user's the attaching position register and service control point, and in the user starts shooting back or roam procedure, be inserted in the mobile switching centre/Visited Location Registor of the current correspondence of caller mobile subscriber.

Described steps A 01 further comprises: the caller mobile subscriber calls out after the callee, calling mobile exchanging center/Visited Location Registor sends to service control point with caller mobile subscriber's unreachable back call service CAMEL-Subscription-Information, and service control point is notified the state of the called monitoring callee of mobile switching centre air interface according to this CAMEL-Subscription-Information.

Described calling mobile exchanging center/Visited Location Registor with the method that caller mobile subscriber's unreachable back call service CAMEL-Subscription-Information sends to service control point is: calling mobile exchanging center/Visited Location Registor sends initial Detection Point message to service control point, comprises the unreachable back call service CAMEL-Subscription-Information in this initial Detection Point message.

Described steps A 06 further comprises: calling mobile exchanging center/Visited Location Registor is given service control point with called unreachable reporting events, and service control point indication calling mobile exchanging center is prepared to carry out alternately with the caller mobile subscriber; Then, calling mobile exchanging center and caller mobile subscriber carry out alternately.

Adopt the IN service mode to realize unreachable back-calling, then described step B is:

B2. after the caller mobile subscriber activates unreachable back call service, caller travelling carriage informing business control point, service control point is controlled the called monitoring callee of mobile switching centre state;

Described step C is:

But C2. monitor callee's the wave point time spent when called mobile switching centre, the report service control point, service control point control calling mobile exchanging center makes a call to the caller mobile subscriber, and notice caller mobile subscriber calls unreachable back call service;

Described step D is:

D2. calling mobile exchanging center is established to caller mobile subscriber and callee's carrying respectively, and then, service control point couples together caller mobile subscriber and callee's carrying, sets up the calling of unreachable back call service.

The described service control point of step B2 is controlled the called monitoring callee of mobile switching centre state and be may further comprise the steps:

B21, service control point are revised the callee's intelligent data that is stored in the called attaching position register;

B22, called attaching position register are inserted into called mobile switching centre/Visited Location Registor with amended callee's intelligent data, and the unreachable back-calling mark is set;

B23, called mobile switching centre monitor callee's state according to the unreachable back-calling mark that is provided with.

The method of the callee's intelligent data in the called attaching position register of the described modification of step B21 is: service control point sends the random time that comprises callee's intelligent data to called attaching position register and revises message;

The method of the described insertion of step B22 callee intelligent data is: called attaching position register sends the insertion subscriber data message that comprises callee's intelligent data to called mobile switching centre/Visited Location Registor.

Described method further comprises: in monitoring callee's state procedure, callee's intelligent data that revise at the special record traffic of called attaching position register control point, and take place after position between Visited Location Registor upgrades the callee, callee's intelligent data of revising is inserted in new mobile switching centre/Visited Location Registor, continues to monitor callee's state.

Described callee's intelligent data comprises: callee's user data, mobile management intelligence subscription data, unreachable back call service data and Looking Out Time parameter, Supplementary Service Code and service control function address.

Before service control point was revised callee's intelligent data of storing in the called attaching position register, called attaching position register was preserved the original intelligent data of callee;

Described method further comprises: after the conversation of caller mobile subscriber and callee's unreachable back-calling is finished, service control point is controlled called attaching position register and is deleted callee's intelligent data in called mobile switching centre/Visited Location Registor, and inserts the original intelligent data of preserving of callee again.

Described step C2 may further comprise the steps:

But C21. called mobile switching centre/Visited Location Registor monitors callee's the air interface time spent, callee's this moment can reach to the service control point report, then, service control point notifies called mobile switching centre to notify called mobile switching centre to stop to monitor the state of callee's air interface;

C22. service control point is to called attaching position register request callee's roaming number, and to indicate be the calling of unreachable back call service, then, called attaching position register and the mutual callee's of called mobile switching centre/Visited Location Registor roaming number, called attaching position register sends to service control point with callee's roaming number again;

C23. service control point notice calling mobile exchanging center/Visited Location Registor callee's this moment can reach, can determine whether to set up and the called mobile calling relation of using the unreachable back-calling of corpse to the caller mobile subscriber, and then calling mobile exchanging center/Visited Location Registor responds to service control point;

C24. calling mobile exchanging center/Visited Location Registor carries out alternately with the caller travelling carriage under the service control point indication, notice caller mobile subscriber foundation concerns with the calling of callee's unreachable back-calling, when the caller mobile subscriber selected to call unreachable back call service, caller travelling carriage and calling mobile exchanging center/Visited Location Registor were set up call bearer.

Described method increases the mobile management Event Detection Point that the callee can reach at service control point in advance;

The described called mobile switching centre/Visited Location Registor of step C21 to the method that service control point report callee's this moment can reach is: called mobile switching centre/Visited Location Registor sends Event Detection Point message to service control point, and described Event Detection Point message carries callee's air interface information available;

The described method of notifying called mobile switching centre to stop to monitor the state of callee's air interface is: service control point sends release message to called mobile switching centre/Visited Location Registor.

The method of step C22 described request callee's roaming number is: service control point sends information request message to called attaching position register;

The method of described mutual callee's roaming number is: called attaching position register sends the message that Provides Roaming Number to called mobile switching centre/Visited Location Registor, and called mobile switching centre/Visited Location Registor returns the response message that Provides Roaming Number to called attaching position register again;

The method that described called attaching position register sends to callee's roaming number service control point again is: called attaching position register sends information request response message to service control point.

Described step D may further comprise the steps:

D21. calling mobile exchanging center/Visited Location Registor sends to called mobile switching centre/Visited Location Registor with caller mobile subscriber's Subscriber Number through gateway MSC, then, called mobile switching centre/Visited Location Registor sends to calling mobile exchanging center/Visited Location Registor with acknowledgement message through gateway MSC, indicates the addressing success;

D22. called mobile switching centre/Visited Location Registor is replied the calling of unreachable back call service to calling mobile exchanging center/Visited Location Registor report callee;

D23. after calling mobile exchanging center/Visited Location Registor detected the calling and called mobile subscriber and replys, the informing business control point calling and called mobile subscriber all replied;

D24. service control point indication calling mobile exchanging center/Visited Location Registor couples together calling and called mobile subscriber's carrying.

The method of the described transmission caller of step D21 mobile subscriber's Subscriber Number is: calling mobile exchanging center/Visited Location Registor sends to called mobile switching centre/Visited Location Registor with initial address message through gateway MSC, and described initial address message carries caller mobile subscriber's Subscriber Number.

The method that the described informing business of step D23 control point calling and called mobile subscriber has all replied is: calling mobile exchanging center/Visited Location Registor sends initial Detection Point message to service control point, and described initial Detection Point message carries the information that the calling and called mobile subscriber has all replied.

Whether the described definite caller mobile subscriber of steps A activates unreachable back call service is: calling mobile exchanging center is play voice suggestion to the caller mobile subscriber, inform that the current callee of caller mobile subscriber is unreachable, and prompting caller mobile subscriber activates unreachable back call service and monitoring time to the callee is set, and described broadcast voice suggestion may further comprise the steps:

A061. the state that called mobile switching centre detects the callee be unreachable after, the mobile subscriber connects with caller, and playing alert tones, prompting caller mobile subscriber can activate unreachable back call service;

A062. the caller mobile subscriber selects whether to activate unreachable back call service by button;

A063. after calling mobile exchanging center monitors the end that collects the digits, if the caller mobile subscriber selects to activate unreachable back call service, then whether calling mobile exchanging center inquiry caller mobile subscriber needs to change the monitoring time to the callee of system default, change if desired, then can be by the monitoring time of button input renewal, do not change if do not need, then still use the monitoring time value of acquiescence, if the caller mobile subscriber selects not activate unreachable back call service, then finish this calling.

Described notice caller mobile subscriber foundation is closed with the calling of callee's unreachable back-calling: calling mobile exchanging center adopts the ring mode to inquire the caller mobile subscriber, and described inquiry caller mobile subscriber's method is:

At first, calling mobile exchanging center impels the ring of caller travelling carriage to sound; Then, if the caller mobile subscriber presses the key of answering on the travelling carriage, then expression selects to set up unreachable back call service, otherwise expression caller mobile subscriber refusal is set up unreachable back call service.

Described notice caller mobile subscriber foundation is closed with the calling of callee's unreachable back-calling: calling mobile exchanging center adopts voice mode inquiry caller mobile subscriber, and described inquiry caller mobile subscriber's method is:

At first, calling mobile exchanging center impels the ring of caller travelling carriage to sound; Then, the caller mobile subscriber press on the travelling carriage answer key after, calling mobile exchanging center is play voice suggestion, whether inquiry caller mobile subscriber selects to set up unreachable back call service; At last, the caller mobile subscriber makes one's options by button.

Adopt the supplementary service mode to realize unreachable back-calling, then calling mobile exchanging center is corresponding one by one with the unreachable back call service operation that button on the cell phone keyboard and triggering calling mobile exchanging center are carried out in advance;

Adopt the IN service mode to realize unreachable back-calling, then service control point is corresponding one by one with the unreachable back call service operation that button on the cell phone keyboard and triggering service control point carry out in advance.

Described method further comprises:

Behind caller mobile subscriber and callee's end of conversation, calling mobile exchanging center and called mobile switching centre respectively go out a ticket, and caller unreachable back call service invocation flags is arranged on the caller mobile subscriber ticket; And called unreachable back call service invocation flags is arranged on callee's ticket.

Use the present invention, in GSM and WCDMA system, when a mobile subscriber calls out another mobile subscriber and callee when being in unreachable state, if the caller mobile subscriber selects to activate unreachable back-calling (CCNRc) business, network monitor callee's state then, in case called wave point can be used, network rebulids the calling relation between the calling and called.Particularly, the present invention has following beneficial effect:

1. use the unreachable back call service that the present invention proposes, can retrieve a large amount of because of the called unreachable call failure that causes, on the one hand, make the caller mobile subscriber can the callee can and the very first time finish conversation; On the other hand, the calling of being retrieved by unreachable back-calling of the present invention can bring to operator and increase considerable economic interests.

2. the IN service mode among employing the present invention realizes unreachable back-calling, and the caller mobile subscriber can be provided with network monitor callee's time, has strengthened participation and the control ability of mobile subscriber in unreachable back call service.

3. the IN service mode among employing the present invention realizes unreachable back-calling, does not need mobile phone terminal to support the CCNRc business, can enlarge to greatest extent and use this professional customer group.

4. the IN service mode among employing the present invention realizes unreachable back-calling, SCP can realization event and the monitoring of state, caller attaching position register HLR1 and called attaching position register HLR2 ask and caller attaching position register HLR1 and caller Visited Location Registor VLR1 between signaling transmission etc., therefore, use IN service mode of the present invention and realize that the CCNRc business is smaller to existing mobile network's transformation.As long as mobile intelligent net can be realized the customization of mobile enhanced logic and use (CAMEL) 4, realization CCNRc business that then can be more or less freely, investment is seldom.

Description of drawings

Fig. 1 is the overview flow chart of unreachable back call service implementation method of the present invention.

Fig. 2 realizes the flow chart of the embodiment of unreachable back-calling by the supplementary service mode for the present invention.

Fig. 3 realizes the flow chart of the embodiment of unreachable back-calling by the IN service mode for the present invention.

Embodiment

For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

In order to retrieve the calling under the unreachable situation of callee, the present invention proposes the notion of unreachable back-calling CCNRc, be that CCNRc is a kind of supplementary service, it is under the untouchable situation of callee, by a kind of business of caller mobile subscriber to network registration, but transfer the time spent to callee's wave point to by unavailable at network monitor, for example the position is upgraded, initiation is professional and accept business etc., and GSM or WCDMA system couple together caller and callee automatically.

As shown in Figure 1, the implementation method of unreachable back call service of the present invention may further comprise the steps:

Step 101, caller mobile subscriber by calling mobile exchanging center (MSC) and if called moving exchanging center MSC 2 call out callees callees be unreachable at this moment, then caller MSC1 determines whether the caller mobile subscriber activates the CCNRc business.

Step 102, caller mobile subscriber activate the CCNRc business, caller MSC1 notice called MS C2 monitoring callee's state.

Step 103, when but called MS C monitors wave point time spent of callee reports to caller MSC1, and caller MSC1 initiates a call to the caller mobile subscriber, and notice caller mobile subscriber calls the CCNRc business.

In this step, can adopt the mode of inquiry to notify the caller mobile subscriber whether to call the CCNRc business.

Step 104, caller mobile subscriber call the CCNRc business, and caller MSC1 couples together caller mobile subscriber and callee's calling, set up CCNRc and call out.

The present invention can realize the CCNRc business by supplementary service and IN service dual mode.

Embodiment 1: realize the CCNRc business by the supplementary service mode.

In the present embodiment, when the mobile subscriber called out the mobile subscriber, the callee was unreachable, after the caller mobile subscriber selects to activate the CCNRc business, and the state of the mobile switching centre at callee place/Visited Location Registor monitor user '; When callee's wave point can with and caller mobile subscriber when also being in idle condition, call the CCNRc business.

As shown in Figure 2, the message flow of successful CCNRc service call mainly comprises following 4 stages:

A, initial condition stage, promptly during initial call, called moving exchanging center MSC 2 determines that callees' state is unreachable, and prompting caller mobile subscriber can select to activate the CCNRc business.

Wherein, the message flow of stage a is as follows:

201, caller mobile subscriber's mobile station MS 1 sends and sets up the mobile switching centre/Visited Location Registor MSC/VLR1 of message to the caller mobile subscriber, sets up and calls out.

202, caller MSC/VLR1 sends to gateway MSC (GMSC) according to callee's Subscriber Number (MSISDN) with initial address message.

203, GMSC sends information request message to called attaching position register HLR2, asks called roaming number (MSRN).

204, called attaching position register HLR2 sends the message (PRN) that Provides Roaming Number to mobile switching centre/Visited Location Registor MSC/VLR2 of callee; Called mobile switching centre/Visited Location Registor MSC/VLR2 returns to called attaching position register HLR2 with callee's MSRN.

205, called attaching position register HLR2 returns to GMSC by information request response message with callee's MSRN sign indicating number.

206, GMSC sends to called mobile switching centre/Visited Location Registor MSC/VLR2 according to callee's MSRN with initial address message.

207, it is unreachable that called mobile switching centre/Visited Location Registor MSC/VLR2 detects the callee, then return release message and give GMSC, and put former because the callee is unreachable and called network is supported the CCNRc business at release message acceptance of the bid note.

208～209, GMSC passes to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with release message, is delivered on caller mobile subscriber's the mobile station MS 1 again, and plays voice suggestion to the caller mobile subscriber.

In this step after release message arrives caller mobile station MS 1, calling mobile exchanging center MSC1 utilizes voice suggestion, inform that the current callee of caller mobile subscriber is unreachable, and prompting caller mobile subscriber to activate CCNRc professional and monitoring time to the callee is set.This business can adopt the mode of double-audio signal (DTMF) to realize that its process is as follows:

(1) called MS C2 detect callee's state be unreachable after, the mobile subscriber connects with caller, and playing alert tones, prompting caller mobile subscriber can activate the CCNRc business;

(2) the caller mobile subscriber selects whether to activate the CCNRc business by button.For example, the user activates the CCNRc business by 1 expression after hearing prompt tone, do not activate the CCNRc business by 0 expression;

(3) after calling mobile exchanging center MSC1 monitors the end that collects the digits, if the caller mobile subscriber selects to activate the CCNRc business, then whether calling mobile exchanging center MSC1 inquiry caller mobile subscriber needs to change the monitoring time to the callee of system default, change if desired, then can be by the monitoring time of button input renewal, if do not need to change, then still use the monitoring time value of acquiescence; If the caller mobile subscriber selects not activate the CCNRc business, then finish this calling.

Need to prove, calling mobile exchanging center MSC1 will be used in advance to activate the CCNRc business the user by number and the operation of CCNRc activation of service be mapped.For example, if the user selects to activate the CCNRc business by 1 expression, then calling mobile exchanging center MSC1 is mapped with the operation that activates the CCNRc business 1 in advance.

So far, the caller mobile subscriber selects to activate the CCNRc business.

B, activation stage, promptly the caller mobile subscriber activates the CCNRc business, the callee's of called MS C2 monitoring then air interface state.

Wherein, the message flow of stage b is as follows:

210～212, caller mobile subscriber's mobile station MS 1 sends CCNRc to calling mobile exchanging center/Visited Location Registor MSC/VLR1 and activates request message, requesting activation CCNRc business; This CCNRc activates request message and is delivered to called attaching position register HLR2 through calling mobile exchanging center/Visited Location Registor MSC/VLR1 and caller attaching position register HLR1.

Caller attaching position register HLR1 is carried on the service code (ss-code) of callee's expression type of service in the CCNRc activation request message herein, pass to called attaching position register HLR2, and ss-code equals CCNRc-B.The purpose that makes ss-code equal CCNRc-B herein is: the business of notifying called Home Location Register HLR2 to start is the CCNRc business under the unreachable situation of user, so that called HLR 2 notice called MS C2 monitoring callees' air interface state; And behind the CCNRc access success, in the ticket of caller MSC1 and called MS C2, indicate the CCNRc business of having carried out under the unreachable situation of user, the convenient charging.

213, called attaching position register HLR2 will begin report message and send to called mobile switching centre/Visited Location Registor MSC/VLR2, indicate called moving exchanging center MSC 2 monitoring callees' state; Then MSC2 will begin to report that response message returns to called attaching position register HLR2, and begin to monitor callee's state.

214～216, called attaching position register HLR2 activates response message with unreachable back-calling and sends to caller attaching position register HLR1, and this unreachable back-calling activates response message and passes to caller mobile subscriber's MS1 through caller attaching position register HLR1 and calling mobile exchanging center/Visited Location Registor MSC/VLR1.

So far, the caller mobile subscriber has activated the CCNRc business.

Under the supplementary service mode, the pre-first to file unreachable back call service of caller mobile subscriber, and set up the CAMEL-Subscription-Information of unreachable back call service, the CAMEL-Subscription-Information of this unreachable back call service leaves in user's the attaching position register, and in the user starts shooting back or roam procedure, be inserted in the mobile switching centre/Visited Location Registor of the current correspondence of caller mobile subscriber.

C, call the stage, but promptly monitor wave point time spent of callee as called MS C2, caller MSC1 initiates a call to the caller mobile subscriber, and notice caller mobile subscriber calls the CCNRc business.

Wherein, the message flow of stage c is as follows:

217, called mobile switching centre/Visited Location Registor MSC/VLR2 wave point of detecting the callee can be used, be that the callee initiates business, accepts business or initiate position renewal etc., then send event report message to called attaching position register HLR2, indication callee's this moment can reach.

218～219, called attaching position register HLR2 sends the remote subscriber available message to caller attaching position register HLR1, and the indication callee can reach; Caller attaching position register HLR1 passes to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with CCNRC remote subscriber available message.

220, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends the MS1 of CCNRc call information message to the caller mobile subscriber, and the information relevant with caller mobile subscriber last call is sent to the caller mobile subscriber; Caller mobile station MS 1 returns CCNRc call information response message.

221, message related to calls is to caller mobile station MS 1 again for calling mobile exchanging center/Visited Location Registor MSC/VLR1 transmission CCNRc, and whether the caller of calling mobile exchanging center MSC1 inquiry simultaneously mobile subscriber sets up the CCNRc calling relation with the callee.

In this step, calling mobile exchanging center MSC1 can call out relation by the CCNRc whether ring and voice dual mode inquiry caller mobile subscriber sets up with the callee.

Wherein, the detailed process of ring mode is: at first, calling mobile exchanging center MSC1 impels the ring of caller mobile station MS 1 to sound; Then, the key of answering that the caller mobile subscriber presses on the travelling carriage promptly represents to select to set up the CCNRc business, otherwise expression caller mobile subscriber refusal is set up the CCNRc business.The detailed process of voice mode is: at first, calling mobile exchanging center MSC1 impels the ring of caller mobile station MS 1 to sound; Then, the caller mobile subscriber press on the travelling carriage answer key after, calling mobile exchanging center MSC1 plays voice suggestion, whether inquiry caller mobile subscriber selects to set up the CCNRc business; Caller the mobile subscriber make one's options by button, and for example, the caller mobile subscriber selects to set up the CCNRc business by 1 expression, sets up the CCNRc business by 0 expression caller mobile subscriber refusal.

No matter need to prove, be ring mode or voice mode, calling mobile exchanging center MSC1 all will be used in advance to set up the CCNRc business the user by number and the operation of setting up the CCNRc business be mapped.

So far, network begins to call the CCNRc business.

D, operational phase, after promptly the caller mobile subscriber initiated CCNRc, caller MSC1 coupled together caller mobile subscriber and callee's calling, set up CCNRc and called out.

Wherein, the message flow of stage d is as follows:

222, caller mobile station MS 1 sends CCNRc to calling mobile exchanging center/Visited Location Registor MSC/VLR1 and sets up message, shows that the caller mobile subscriber begins to set up CCNRc and calls out.

223～224, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends CCNRc remote subscriber available response message to caller attaching position register HLR1; Simultaneously, HLR1 according in the call information message with the relevant information of caller mobile subscriber last call, the initial address message of CCNRc service call is sent to GMSC.

225, the information request message of GMSC transmission CCNRc calling is asked called MSRN once more to called attaching position register HLR2.

226, called attaching position register HLR2 sends and Provides Roaming Number message to called moving exchanging center MSC 2; The MSRN that called mobile switching centre/Visited Location Registor MSC/VLR2 returns the callee gives called attaching position register HLR2;

227, called attaching position register HLR2 returns to GMSC with callee's MSRN sign indicating number in information request response message.

228, GMSC sends initial address message to called mobile switching centre/Visited Location Registor MSC/VLR2 according to callee's MSRN, sets up CCNRC and calls out; Called mobile switching centre/Visited Location Registor MSC/VLR2 connects with called after receiving initial address message.

229～231, after called mobile switching centre/Visited Location Registor MSC/VLR2 and callee connect, send acknowledgement message to GMSC; And called mobile switching centre/Visited Location Registor MSC/VLR2 sends CCNRc to called attaching position register HLR2 and calls out report message; GMSC passes to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with acknowledgement message.

232～233, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends prompting/connection message to caller mobile station MS 1, the success of CCNRC call setup; Then, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends CCNRc and calls out report message to caller attaching position register HLR1, indication CCNRC access success.

234, called attaching position register HLR2 sends and stops report message to called mobile switching centre/called state of Visited Location Registor MSC/VLR2 indication stopping to report.

So far, the CCNRc call establishment finishes, and this CCNRc process is finished.

Embodiment 2: realize the CCNRc business by the IN service mode.

Present embodiment utilizes the calling party of CAMEL4 in the IN service to handle (CPH) ability and realizes the CCNRc business.Particularly, when the mobile subscriber called out the mobile subscriber, the callee was unreachable, after the caller mobile subscriber selects to activate the CCNRc business, and the moving exchanging center MSC 2 monitoring callees' at callee place state; When callee's wave point can with and caller mobile subscriber when also being in idle condition, call the CCNRc business.In the present embodiment, utilize Service Control Point to realize that embodiment 1 supplementary service mode realizes the function of caller HLR1 in the CCNRc method.

As shown in Figure 3, the message flow of successful CCNRc service call mainly comprises following 4 stages:

A, initial condition stage, promptly during initial call, called network determines that callee's state is unreachable, and prompting caller mobile subscriber can activate the CCNRc business.

Wherein, the message flow of stage A is as follows:

301, caller mobile subscriber's mobile station MS 1 sends and sets up the mobile switching centre/Visited Location Registor MSC/VLR1 of message to caller, sets up and calls out.

302, calling mobile exchanging center/Visited Location Registor MSC/VLR1 finds that according to caller mobile subscriber's subscription data the caller mobile subscriber has the CCNRc business, then send initial Detection Point message to SCP, then SCP is according to the state of the monitoring callee of the called mobile switching centre of initial Detection Point message informing air interface.

303, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends initial address message to gateway MSC GMSC according to callee's MSISDN.

304, after GMSC receives initial address message, send information request message, request callee's MSRN to called attaching position register HLR2.

305, called attaching position register HLR2 sends and Provides Roaming Number message to called mobile switching centre/Visited Location Registor MSC/VLR2; Called mobile switching centre/Visited Location Registor MSC/VLR2 returns to called attaching position register HLR2 with callee's MSRN.

306, called attaching position register HLR2 returns to GMSC by information request response message with callee's MSRN sign indicating number.

307, GMSC sends initial address message to called mobile switching centre/Visited Location Registor MSC/VLR2 according to callee's MSRN.

308, it is unreachable that called mobile switching centre/Visited Location Registor MSC/VLR2 detects the callee, then return release message and give GMSC, in release message, carry simultaneously two cells: the unreachable and called network support CCNRc business of user, the mark release cause is that the callee is unreachable, and indication GMSC called network is supported the CCNRc business.

309～310, GMSC passes to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with the release message that receives; Calling mobile exchanging center/Visited Location Registor MSC/VLR1 gives SCP with called unreachable reporting events, and SCP indication caller MSC1 prepares to carry out alternately with the caller mobile subscriber.

311, calling mobile exchanging center MSC1 and caller mobile subscriber are mutual, and whether the mobile subscriber will activate the CCNRc business by voice suggestion inquiry caller.

In this step, calling mobile exchanging center MSC1 plays voice suggestion to the caller mobile subscriber, inform that the current callee of caller mobile subscriber is unreachable, and prompting caller mobile subscriber to activate CCNRc professional and monitoring time to the callee is set.This business can DTMF mode realize that its process is as follows:

(1) calling mobile exchanging center MSC1 finds the unreachable and called network support CCNRc business of callee from release message, and then playing alert tones points out the caller mobile subscriber can activate the CCNRc business;

Need to prove, SCP at first will be used to activate the CCNRC business the user by number and the operation of CCNRc activation of service be mapped.For example, if the user selects to activate the CCNRC business by 1 expression, then SCP is mapped with the operation that activates the CCNRc business 1 in advance.

So far, the caller mobile subscriber selects to activate the CCNRc business.

B, activation stage, after promptly the caller mobile subscriber activates the CCNRc business, SCP control called MS C2 monitoring callee's state.

Wherein, the message flow of stage B is as follows:

312, calling mobile exchanging center MSC1 is according to the caller CCNRc business of having contracted, and called network can support CCNRc, then reports callee's caller mobile subscriber to activate the CCNRc business to SCP.

313, the SCP random time that will carry cells such as CCNRc, Looking Out Time, MSISDN, mobile management intelligence subscription data (MM-CSI), business function control (SCF) address is revised message and is sent to called attaching position register HLR2, in order to revise callee's user data.

In this step, revise the ss-code that uses in the message at SCP to any time that HLR2 sends and be CCNRc-B, and called attaching position register HLR2 also writes down ss-code and MM-CSI that SCP inserts into specially, its purpose is: during CCNRc monitors, if the position that the callee is taken place between VLR is upgraded, then ss-code and MM-CSI are inserted among the new MSC/VLR, can continue to monitor callee's state.In addition, when the CCNRc service ending, ss-code and MM-CSI that the HLR2 deletion is above-mentioned.

314, called attaching position register HLR2 is by inserting subscriber data message, the MM-CSI and the call-back service data that will come from SCP are inserted into called mobile switching centre/Visited Location Registor MSC/VLR2, the unreachable back-calling activation tagging is set simultaneously, and monitors callee's state; And called mobile switching centre/Visited Location Registor MSC/VLR2 sends to called attaching position register HLR2 and inserts the user data response message, indicates the user data insertion and finishes.

In this step, in the insertion subscriber data message that VLRB sends, the ss-code of insertion is CCNRc-B at HLR2.

315, called attaching position register HLR2 sends random time to SCP and revises response message, and the called moving exchanging center MSC 2 of notice SCP begins to monitor callee's air interface state.

So far, the caller mobile subscriber has activated the CCNRc business, called moving exchanging center MSC 2 monitoring callee's in the monitoring time of system default or caller mobile subscriber setting state.

If the callee is unreachable always in the time of setting, then this CCNRc calling service failure, SCP notifies called moving exchanging center MSC 2 to stop to monitor callee's state.For example, the length of the Looking Out Time that the caller mobile subscriber sets is 30 minutes, if then callee's air interface is unavailable always in 30 minutes, then this CCNRC calling service failure, SCP notifies called moving exchanging center MSC 2 to stop to monitor callee's state.

C, call the stage, but promptly monitor wave point time spent of callee as called MS C2, SCP control caller MSC1 makes a call to the caller mobile subscriber, and notice caller mobile subscriber calls the CCNRc business.

Wherein, the message flow of stage C is as follows:

316, but called mobile switching centre/Visited Location Registor MSC/VLR2 detects callee's the air interface time spent, sends mobile management Event Detection Point message to SCP, and indication callee's this moment can reach;

317, SCP sends release message to called mobile switching centre/Visited Location Registor MSC/VLR2, indicates called mobile switching centre to stop to monitor the state of callee's air interface;

318, SCP sends information request message to called attaching position register HLR2, request callee's MSRN, and to indicate be that CCNRc calls out.

319, called attaching position register HLR2 sends the message that Provides Roaming Number to called mobile switching centre/Visited Location Registor MSC/VLR2, and to indicate be that CCNRc calls out; The MSRN that called mobile switching centre/Visited Location Registor MSC/VLR2 returns the callee gives called attaching position register HLR2.

320, HLR2 sends to SCP by information request response message with callee's MSRN.

321, SCP sends initial call and attempts message to calling mobile exchanging center/Visited Location Registor MSC/VLR1, and then caller MSC/VLR1 attempts response message to the flourishing initial call of SCP.

322, SCP indication caller MSC/VLR1 and caller mobile station MS 1 connect, and whether inquiry caller mobile subscriber selects to call the CCNRc business; When the caller mobile subscriber selected to call the CCNRc business, caller MS1 set up the call bearer with calling mobile exchanging center/Visited Location Registor MSC/VLR1.

In this step, SCP control calling mobile exchanging center MSC1 can realize by ring and voice dual mode to the inquiry that the caller mobile subscriber initiates, and its specific implementation process is identical with ring mode and voice mode among the embodiment 1.

No matter need to prove, be ring mode or voice mode, SCP all will be used in advance to call the CCNRc business the user by number and the operation of calling the CCNRc business be mapped.

So far, network can call the CCNRC business.

For the air interface that makes SCP detect the callee in the invoked procedure of CCNRC is in upstate, then in SCP, increase the Event Detection Point that callee's air interface can be used in the present embodiment in advance.

D, operational phase, promptly caller MSC1 is established to caller mobile subscriber and callee's carrying respectively, and then, SCP couples together caller mobile subscriber and callee's carrying, sets up CCNRc and calls out.

Wherein, the message flow of stage D is as follows:

323～324, calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends to called mobile switching centre/Visited Location Registor MSC/VLR2 with initial address message through GMSC.

The purpose of above-mentioned two steps is: the initial call that calling mobile exchanging center/Visited Location Registor MSC/VLR1 sends according to SCP in the step 321 is attempted the MSRN in the message, is addressed to the MSC/VLR2 at callee place.

325～326, called mobile switching centre/Visited Location Registor MSC/VLR2 sends to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with acknowledgement message through GMSC, indicates the addressing success.

327, called mobile switching centre/Visited Location Registor MSC/VLR2 passes to calling mobile exchanging center/Visited Location Registor MSC/VLR1 with response message, indicates the callee and CCNRc is called out replys.

328, calling mobile exchanging center/Visited Location Registor MSC/VLR1 detects the calling and called mobile subscriber and replys back transmission incident checkpoint message to SCP, indicates the calling and called mobile subscriber and all replys.

329, SCP sends and moves carrying branch (Move Leg) message to calling mobile exchanging center/Visited Location Registor MSC/VLR1, and indication couples together calling and called mobile subscriber's carrying.

So far, the CCNRc call establishment finishes, and completes successfully this CCNRc and calls.

In the present embodiment, after calling and called mobile subscriber conversation is finished, SCP is addressed to called HLR 2 according to callee's MSISDN, utilize random time modification message and insertion subscriber data message that the intelligent subscription data and the unreachable back-calling supplementary service data of mobile management are deleted from called MS C/VLR2 by called HLR 2, and again that the user is original mobile management intelligence subscription data is inserted among the called MS C/VLR2.

In addition, be addressed to called HLR 2 at SCP according to callee's MSISDN, after utilizing random time to revise message and inserting subscriber data message the intelligent subscription data of mobile management and unreachable back-calling supplementary service data are gone from insert called MS C/VLR by called HLR 2, if the position that the callee has been taken place between the MSC is upgraded, for example the callee moves to MSC/VLR3 from MSC/VLR2, then called HLR 2 need be inserted into the intelligent subscription data and the unreachable back-calling supplementary service data of mobile management among the new MSC again, promptly be inserted among the MSC3, then MSC/VLR3 triggers the SCP of MM-CSI to appointment again, and the user contracting data among the called HLR 2 deletion MSC/VLR2.

Realize in the charging process of CCNRc operational approach in the intelligent scheme of application of the present invention, behind caller mobile subscriber and callee's end of conversation, caller MSC1 goes out a mobile originating (MOC) ticket, called MS C2 goes out a Mobile terminating call and calls out (MTC) ticket, CCNRc-A supplementary service invocation flags is arranged on the caller mobile subscriber ticket, show that the caller mobile subscriber once called the CCNRc business; CCNRc-B supplementary service invocation flags is arranged on callee's ticket, show that the callee once used the CCNRc business.And, put voice suggestion for the caller mobile subscriber for the first time, when whether the prompting user activates the CCNRc business, though the caller mobile subscriber has sent response message, because be voice suggestion, call list not, perhaps on institute's call list, stamp special marking, do not make rates ground.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of implementation method of unreachable back call service is characterized in that, this method may further comprise the steps:

D. the caller mobile subscriber calls unreachable back call service, and calling mobile exchanging center couples together caller mobile subscriber and callee's calling, sets up unreachable back-calling and calls out.

2, the method for claim 1 is characterized in that, described steps A may further comprise the steps:

3, method as claimed in claim 2, it is characterized in that steps A 02 described calling mobile exchanging center/Visited Location Registor with the method that callee's Subscriber Number sends to gateway MSC is: calling mobile exchanging center/Visited Location Registor sends the initial address message of the roaming number that carries the callee to gateway MSC;

4, the method for claim 1, it is characterized in that, adopt the supplementary service mode to realize unreachable back-calling, the pre-first to file unreachable back call service of caller mobile subscriber, and set up the CAMEL-Subscription-Information of unreachable back call service, the CAMEL-Subscription-Information of this unreachable back call service leaves in caller mobile subscriber's the attaching position register, and in the caller mobile subscriber starts shooting back or roam procedure, be inserted in the mobile switching centre/Visited Location Registor of the current correspondence of caller mobile subscriber, then described step B may further comprise the steps:

5, method as claimed in claim 4, it is characterized in that, the method that step B11 described request activates unreachable back call service is: caller mobile subscriber's travelling carriage sends unreachable back-calling to calling mobile exchanging center/Visited Location Registor and activates request message, this unreachable back-calling activates request message through calling mobile exchanging center/Visited Location Registor and caller attaching position register, is delivered to called attaching position register.

As claim 4 or 5 described methods, it is characterized in that 6, the method for the described requesting activation unreachable back call service of step B11 further comprises:

7, the method for claim 1 is characterized in that, adopts the supplementary service mode to realize unreachable back-calling, and then described step C may further comprise the steps:

C14. calling mobile exchanging center/Visited Location Registor notice caller travelling carriage can be set up unreachable back call service, and whether definite caller mobile subscriber sets up the calling relation with callee's unreachable back-calling.

8, method as claimed in claim 7, it is characterized in that, the method that the described called mobile switching centre/Visited Location Registor of step C11 indicates called attaching position register callee's this moment to reach is: called mobile switching centre/Visited Location Registor sends event report message to called attaching position register, and described event report message carries callee's wave point information available;

9, the method for claim 1 is characterized in that, adopts the supplementary service mode to realize unreachable back-calling, and then described step D may further comprise the steps:

10, method as claimed in claim 9, it is characterized in that the method that unreachable back-calling is set up in the described calling mobile exchanging center of step D12/Visited Location Registor notice caller location register caller this moment mobile subscriber request is: calling mobile exchanging center/Visited Location Registor sends the remote subscriber available message of unreachable back-calling to the caller attaching position register;

11, method as claimed in claim 1 or 2, it is characterized in that, adopt the IN service mode to realize unreachable back call service, then this method further comprises: the pre-first to file unreachable back call service of caller mobile subscriber, and set up the CAMEL-Subscription-Information of unreachable back call service, the CAMEL-Subscription-Information of this unreachable back call service leaves in user's the attaching position register and service control point, and in the user starts shooting back or roam procedure, be inserted in the mobile switching centre/Visited Location Registor of the current correspondence of caller mobile subscriber.

12, method as claimed in claim 11, it is characterized in that, described steps A 01 further comprises: the caller mobile subscriber calls out after the callee, calling mobile exchanging center/Visited Location Registor sends to service control point with caller mobile subscriber's unreachable back call service CAMEL-Subscription-Information, and service control point is notified the state of the called monitoring callee of mobile switching centre air interface according to this CAMEL-Subscription-Information.

13, method as claimed in claim 12, it is characterized in that, described calling mobile exchanging center/Visited Location Registor with the method that caller mobile subscriber's unreachable back call service CAMEL-Subscription-Information sends to service control point is: calling mobile exchanging center/Visited Location Registor sends initial Detection Point message to service control point, comprises the unreachable back call service CAMEL-Subscription-Information in this initial Detection Point message.

14, method as claimed in claim 11, it is characterized in that, described steps A 06 further comprises: calling mobile exchanging center/Visited Location Registor is given service control point with called unreachable reporting events, and service control point indication calling mobile exchanging center is prepared to carry out alternately with the caller mobile subscriber; Then, calling mobile exchanging center and caller mobile subscriber carry out alternately.

15, the method for claim 1 is characterized in that, adopts the IN service mode to realize unreachable back-calling, and then described step B is:

Described step C is:

Described step D is:

16, method as claimed in claim 15 is characterized in that, the described service control point of step B2 is controlled the called monitoring callee of mobile switching centre state and be may further comprise the steps:

17, method as claimed in claim 16, it is characterized in that the method for the callee's intelligent data in the called attaching position register of the described modification of step B21 is: service control point sends the random time that comprises callee's intelligent data to called attaching position register and revises message;

18, method as claimed in claim 16, it is characterized in that, described method further comprises: in monitoring callee's state procedure, callee's intelligent data that revise at the special record traffic of called attaching position register control point, and take place after position between Visited Location Registor upgrades the callee, callee's intelligent data of revising is inserted in new mobile switching centre/Visited Location Registor, continues to monitor callee's state.

19, as claim 16,17 or 18 described methods, it is characterized in that described callee's intelligent data comprises: callee's user data, mobile management intelligence subscription data, unreachable back call service data and Looking Out Time parameter, Supplementary Service Code and service control function address.

20, method as claimed in claim 15 is characterized in that, before service control point was revised callee's intelligent data of storing in the called attaching position register, called attaching position register was preserved the original intelligent data of callee;

21, method as claimed in claim 15 is characterized in that, described step C2 may further comprise the steps:

But C21. called mobile switching centre/Visited Location Registor monitors callee's the air interface time spent, callee's this moment can reach to the service control point report, then, service control point notifies called mobile switching centre to stop to monitor the state of callee's air interface;

C23. service control point notice calling mobile exchanging center/Visited Location Registor callee's this moment can and, can determine whether to set up calling relation with callee's unreachable back-calling to the caller mobile subscriber, then calling mobile exchanging center/Visited Location Registor responds to service control point;

22, method as claimed in claim 21 is characterized in that, described method increases the mobile management Event Detection Point that the callee can reach at service control point in advance;

23, method as claimed in claim 21 is characterized in that, the method for step C22 described request callee's roaming number is: service control point sends information request message to called attaching position register;

24, method as claimed in claim 15 is characterized in that, described step D may further comprise the steps:

25, method as claimed in claim 24, it is characterized in that, the method of the described transmission caller of step D21 mobile subscriber's Subscriber Number is: calling mobile exchanging center/Visited Location Registor sends to called mobile switching centre/Visited Location Registor with initial address message through gateway MSC, and described initial address message carries caller mobile subscriber's Subscriber Number.

26, method as claimed in claim 24, it is characterized in that, the method that the described informing business of step D23 control point calling and called mobile subscriber has all replied is: calling mobile exchanging center/Visited Location Registor sends initial Detection Point message to service control point, and described initial Detection Point message carries the information that the calling and called mobile subscriber has all replied.

27, the method for claim 1, it is characterized in that, whether the described definite caller mobile subscriber of steps A activates unreachable back call service is: calling mobile exchanging center is play voice suggestion to the caller mobile subscriber, inform that the current callee of caller mobile subscriber is unreachable, and prompting caller mobile subscriber activates unreachable back call service and monitoring time to the callee is set, and described broadcast voice suggestion may further comprise the steps:

28, as claim 1 or 7 described methods, it is characterized in that, described notice caller mobile subscriber foundation is closed with the calling of callee's unreachable back-calling: calling mobile exchanging center adopts the ring mode to inquire the caller mobile subscriber, and described inquiry caller mobile subscriber's method is:

29, as claim 1 or 7 described methods, it is characterized in that, described notice caller mobile subscriber foundation is closed with the calling of callee's unreachable back-calling: calling mobile exchanging center adopts voice mode inquiry caller mobile subscriber, and described inquiry caller mobile subscriber's method is:

30, the method for claim 1, it is characterized in that, adopt the supplementary service mode to realize unreachable back-calling, then calling mobile exchanging center is corresponding one by one with the unreachable back call service operation that button on the cell phone keyboard and triggering calling mobile exchanging center are carried out in advance;

31, method as claimed in claim 15 is characterized in that, described method further comprises: