CN101217705B

CN101217705B - A realization method, system and device of USSD service

Info

Publication number: CN101217705B
Application number: CN2008100025728A
Authority: CN
Inventors: 唐溢龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-01-09
Filing date: 2008-01-09
Publication date: 2012-11-21
Anticipated expiration: 2028-01-09
Also published as: CN101217705A

Abstract

The embodiment of the invention discloses a realization method of USSD service, which comprises the steps: USSD requiring signal information sent from the calling party is received; that whether the user service corresponding to the USSD requiring signal and the USSD service corresponding to the USSD requiring signal are in a relatively prohibited state is judged; provided that a user service is in the prohibited state correspondingly to the USSD service, the user service is prohibited. The invention can forbid user from using charging USSD service in a BAOC state according to setting, thus reducing the loss of operator and avoiding unnecessary USSD service taking up resource.

Description

A kind of USSD business realization mthods, systems and devices

Technical field

The present invention relates to the mobile communication technology field, particularly relate to a kind of USSD business realization mthods, systems and devices.

Background technology

Unstructured supplementary data traffic (USSD Unstructured Supplementary Service Data) is a kind of novel real-time interactive data service based on the GSM network, and it is a kind of novel service of on the short-message system technical foundation of GSM, releasing.

The USSD business is mobile operator for excavating the new business that GSM network potentiality are developed, and introducing is should business very little to original system configuration influence, and the input cost of operator is little.From portable terminal, present most of GSM mobile handset all can support USSD professional, and professional introducing also provides a good applied environment to USSD for this.

1, the service feature of USSD

USSD is similar with short message service (SMS), is carried on the signaling channel of GSM network; Similar with the WAP business again, the real-time interactive data service is provided.Below through USSD professional professional with short message (SMS), WAP is professional to recently describing the service feature of USSD.

(1) bearer path

The WAP service bearer is on CSD passage or GPRS mobile packet data passage, and USSD and SMS business all are carried on the signaling channel of GSM.Though USSD and SMS all are carried on the signaling channel, the signaling channel that is carried is distinguishing.Under talking state, it is Separate Dedicated Control Channel (SDCCH) that USSD uses identical signaling channel with SMS, and message transmission rate is approximately 600bit/s.And under non-talking state, SMS uses and follows channel (SACCH) at a slow speed, and the USSD use follows channel (FACCH), message transmission rate to be approximately 1kbit/s fast, and is much rapider than the SMS transmission rate.

(2) real-time interactive business and messaging service

Secondly, USSD keeps wireless connections always in conversation procedure, transparent channel end to end is provided, and does not store forwarding; And SMS does not have session channel at the physical carrier layer, is a store-and-forward system, and the user accomplishes one query need set up repeatedly conversation procedure.Because USSD does not adopt store-and-forward mode; The transmission that adds each data need not rebulid channel; With regard to the response time; USSD is faster than short message response speed, and this is as far as using through the inquiry business of repeatedly data interaction at user side and application server end, and it is outstanding that this advantage of USSD more shows.The USSD business is that a kind of real-time interactive is professional, and the WAP business that this point and GSM are provided is quite similar.

(3) convenience of modification menu option

USSD and WAP can adjust accordingly service content at server end; Especially USSD can revise menu easily at server end; And the STK card that is the basis with the SMS business; Need to revise the SMS menu option in the STK card, aspect business development, just seem not very convenient through the air download of application server.

Therefore the USSD business has picture SMS advantage inexpensive, easy to use, and having again as WAP to provide real-time interactive professional advantage, so USSD will bring a huge business opportunity to operator and service provider.

2, the professional application of USSD

Along with the continuous development of IT technology and the in-depth of market economy reform; Ecommerce is progressively carried out; Business such as for example stock market's transaction, bank accounting inquiry, telephone expenses inquiry, and the dispatching requirement of enterprises all provide following application market for the USSD business.

For example, there are more than 3,000 ten thousand stock investers in the whole nation now, and is very big to the demand of real-time stock information, and hope can be looked into the news quotations on the stock market whenever and wherever possible in real time and concluded the business.Yet, utilize existing SMS platform can't accomplish above task.If utilize the USSD platform to set up real-time, visual, an interactively stock inquiry and transaction system, necessarily have a very big market.

Again for example, the existing enterprise of China utilizes the USSD platform to set up the control centre, and contact staff's customer service is dispatched.Enterprise customer service control centre is through renting the USSD center that the operator is moved in private line access.This control centre can be through a session of being initiated by central dispatching personnel (or central database), and central dispatching personnel and contact staff cross secondary data through number and assign alternately and send worker's advice note; Or a session through initiating by the contact staff, contact staff and center dispatcher (or central database) report the complete report list through data interaction for several times.

In addition, as inquiry businesses such as competitive sports information, flight message, commodity price, weather forecast, total marks of the examination, market surveys; Lottery industry classes such as guess with lottery, interactive game, purchase lottery ticket are professional; Ecommerce such as mobile banking, small amount payment, shopping online, predetermined air ticket, mobile phone prepaid card are supplemented with money, the public transport monthly ticket is permitted value and all kinds of Interactive Advertising all can be accomplished by USSD.

If substitute to have the information on demand menu option of SMS now with USSD information on demand menu option, when then releasing a kind of new SMS demand (telecommunication) service in operator, the user will no longer need change the STK card

Aspect the enterprise network communication management application, the enterprise customer can connect the database in the enterprise fast, accomplishes information retrieval, but for the inquiry of big data quantity more online in real time accomplish, consistent with existing WAP enterprise network function, but expense greatly reduces.

Because USSD has low-cost and business function developing flexible characteristic, its developmental research has caused the attention of each big IT enterprises, and the WAP based on USSD that adapts therewith arises at the historic moment.Believe the development along with mobile e-business, utilizing the USSD mobile subscriber to obtain various information will be more and more convenient, and the operator of USSD and service provider will have a vast market prospect.

In a word, USSD has built an economic, practical real time data interaction platform for the mobile data value-added service, awaits each SP and utilizes this platform to go to develop various new application, may create a big market that is similar to short message service.

3, the deficiency of USSD business function

But along with USSD uses more and more widely, problem wherein also highlights gradually.Such as: in practical application; When terminal use's expense be 0 or arrearage after; Can be by operator's Barring of All Outgoing Calls or mobile originating short message (ODB_BAOC) (Operator Determined Barring-Barring of AllOutgoing Calls); But all call business of locking at present only to originating call with start short message, thereby the USSD business of its charge is not limited yet during subscriber arrearage.

The technical scheme of existing USSD comprises user terminal start USSD operational program and termination USSD operational program, is specially:

The user terminal USSD operational program that starts, as shown in Figure 1, comprise following process step:

Step S101, user terminal are initiated the USSD service request, carry USSD service code serivce code:*#88#;

Step S102, MSC check user data to VLR after receiving the USSD service request;

Step S103, VLR check user related data, comprise that subscriber arrearage or customer charge are 0, i.e. ODB_BAOC, and the USSD command code: * #88# passes to HLR or USSD center;

Step S104, HLR or USSD center return to VLR to result;

Step S105, VLR return to MSC to HLR or USSD center processing result;

Step S106, MSC return to the terminal to result, accomplish a USSD operation.

Termination USSD operational program further comprises HLR or USSD center start two kinds of the USSD operational programs of USSD operational program and VLR that start again, is specially:

HLR or the USSD center USSD operational program that starts, as shown in Figure 2, comprise process step:

USSD request/USSD notify signaling, the USSD that starts operation are sent in step S201, HLR or USSD center;

Step S202, VLR receive the USSD request/USSDnotify signaling that send at HLR or USSD center, and the USSD operation is handed down to MSC;

Step S203, MSC send USSD request/USSD notify signaling, are handed down to the terminal to the USSD operation;

USSD Response signaling is sent at step S204, terminal, returns USSD operation response results;

Step S205, MSC send USSD Response signaling, return to VLR to the USSD operating result at terminal;

Step S206, VLR directly send USSD Response signaling, return to HLR or USSD center to the USSD operating result;

Step S207, after through a plurality of USSD operation, the USSDRelease signaling is sent at HLR or USSD center, finishes the USSD operating interactive;

Step S208, VLR send USSD Release signaling, finishing USSD operational notification MSC;

Step S209, MSC send USSD Release signaling, issue the terminal finishing the USSD operational notification, finish this USSD operation.

The VLR USSD operational program that starts, as shown in Figure 3, comprise process step:

Step S301, VLR send USSD request/USSD notify signaling, the USSD that starts operation;

Step S302, MSC send USSD request/USSD notify signaling, are handed down to the terminal to the USSD operation;

USSD Response signaling is sent at step S303, terminal, returns USSD operation response results;

Step S304, MSC send USSD Response signaling, return to VLR to the USSD operating result at terminal;

Step S305, after through a plurality of USSD operation, VLR sends USSD Release signaling, finishes the USSD operating interactive;

Step S306, MSC send USSD Release signaling, issue the terminal finishing the USSD operational notification, finish this USSD operation.

In realizing embodiment of the invention process, the inventor finds to exist at least in the prior art following problem:

The USSD that the user still can be done charge afterwards by all call business of locking (BAOC) is professional.

Summary of the invention

The problem that the embodiment of the invention will solve provides a kind of professional method of user's locking USSD to being in the state of being under an embargo.

For achieving the above object, the embodiment of the invention proposes a kind of USSD business realization method on the one hand, may further comprise the steps:

Receive the USSD demand signalling that the calling party sends;

Judge whether the corresponding user of the said USSD demand signalling USSD business corresponding with respect to said USSD demand signalling is in the state of being under an embargo;

If said user is in the state of being under an embargo with respect to said USSD business, then send the termination signaling of said USSD demand signalling to the calling party.

On the other hand, the embodiment of the invention also provides a kind of USSD business realization system, comprising:

The calling party is used to send the USSD demand signalling;

Network entity; Be used to receive the USSD demand signalling that said calling party sends; And judge whether the corresponding user of the said USSD demand signalling USSD business corresponding with respect to said USSD demand signalling is in the state of being under an embargo, as be in illegal state, then send the termination signaling of said USSD demand signalling to said calling party; As be not in illegal state, it is professional then to carry out the corresponding USSD of said USSD demand signalling.

On the one hand, the embodiment of the invention also provides a kind of network entity, comprising again:

USSD signaling receiver module is used to receive the USSD demand signalling that the calling party sends;

Judge module is used to judge whether the corresponding user's USSD business corresponding with respect to said USSD demand signalling of USSD demand signalling that said USSD signaling receiver module is received is in the state of being under an embargo;

The USSD signaling sending module is used for being in when being under an embargo state the termination signaling of sending said USSD demand signalling to said calling party with respect to said USSD business said user;

Said USSD signaling Executive Module is used for not being in when being under an embargo state with respect to said USSD business said user, and it is professional to carry out said USSD.

The technical scheme of the embodiment of the invention has the following advantages, because adopt network entity to extract the USSD service code, and inspection user BAOC data; Judge the professional method of carrying out authority of USSD; So avoided in the existing USSD realization technology the user not being carried out the BAOC checking, causing subscriber arrearage or expense is the professional situation of USSD of still can charging under 0 the state, has realized the professional state recognition of USSD; Can judge whether corresponding USSD business is available according to the user balance state; And the not enough user's of locking expense USSD business process, reduce operator's loss, the effect of avoiding unnecessary USSD service resources to take thereby reach.

Description of drawings

Fig. 1 is the professional scheme schematic flow sheet of USSD that starts of user in the prior art;

Fig. 2 is HLR in the prior art or the USSD center professional scheme schematic flow sheet of USSD that starts;

Fig. 3 is the professional scheme schematic flow sheet of USSD that starts of VLR in the prior art;

Fig. 4 is the professional schematic flow sheet of USSD that starts of user in the embodiment of the invention one;

Fig. 5 is HLR in the embodiment of the invention two or the USSD center professional schematic flow sheet of USSD that starts;

Fig. 6 is the structural representation of USSD business realization system in the embodiment of the invention three.

Embodiment

Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail:

In the embodiment of the invention one, initiate the USSD request by user terminal MS, content is professional for asking HLR or USSD center to start the pairing USSD of USSD service code * #88#.

The embodiment of the invention provides a kind of method, through extracting user's USSD service code, HLR or USSD center can be read smoothly, and it is professional to accomplish the required USSD of user; Simultaneously, be under 0 the situation, to limit this user and use charge USSD professional in subscriber arrearage or expense.

As shown in Figure 4, be the start schematic flow sheet of USSD scheme of user terminal MS, may further comprise the steps:

Step S401, user terminal MS send USSD Request signaling to MSC, carry the USSD service code: * #88# proposes the USSD service request.

Step S402, MSC receive USSD Request signaling, and extract the service code * #88# in this USSD Request signaling.

This USSD Request signaling corresponding user data among step S403, the inspection VLR; Judge whether to exist this user's BAOC data; Judge promptly whether this user is in the arrearage state or the expense remaining sum is 0 state; As there not being this user's BAOC data among the VLR, then continue the USSD business, change step S404 over to.

Above-mentioned steps judges promptly whether the user who sends USSD Request signaling is in the state of being under an embargo with respect to the pairing USSD business of this USSDRequest signaling.

Step S404, as there being this user's BAOC data among the VLR; Search identical USSD service code in the receipts of then in MSC/VLR, presetting/free USSD Service Database with USSD service code * #88#; Further judging whether this USSD business is coin free service, is not coin free service if judge pairing USSD business, then changes step S405 over to; If judge that pairing USSD business is a coin free service, then change step S406 over to.

Receive/free USSD Service Database is preset in MSC or VLR by operator, has stipulated that wherein the pairing USSD business of USSD service code is charge operation or coin free service.

If this USSD business of step S405 is not a coin free service, it is professional then to stop this USSD, sends USSD Reject signaling to MS, and refusal USSD service request is accomplished this USSD business operation, and promptly this USSD business operation is failure.

If there are not this user's BAOC data among the step S406 VLR; Or; Have the BAOC data but USSD that this user asked is professional is coin free service, it is professional then to continue this USSD, issues USSD Request signaling to HLR or USSD center; Carry USSD service code * #88#, it is professional that USSD is carried out in request.

Step S407, HLR or USSD center receive USSD Request signaling; Entrained USSD service code * #88# in the identification signaling; It is professional to carry out the pairing USSD of this USSD service code, and sends USSD Response signaling to MSC, returns the USSD business operation result.

Step S408, MSC receive USSD Response signaling, and send the USSDResponse signaling to MS, return the USSD business operation result, accomplish this USSD business operation, and promptly this USSD business operation is successfully.

In practical application, MSC and VLR can close and establish.

A kind of USSD of termination is provided in the embodiment of the invention two professional method, has forbidden that it is the user terminal of the 0 state USSD business that starts that mind-set among HLR or the USSD is in arrearage or expense, the USSD demand signalling that interception is sent to this type of user terminal.As shown in Figure 5, be the professional method flow diagram of termination USSD, may further comprise the steps:

The mind-set network entity sends USSD Request signaling or USSD Notify signaling among step S501, HLR or the USSD, and request starts the professional perhaps notification target user of USSD and carries out the USSD business.

The signaling that send at step S502, network entity reception HLR or USSD center, and check the BAOC data that whether have this user among the VLR, if do not have, then change step S505 over to.

In practical application, above-mentioned BAOC data also can use BOIC (locking incoming call business Barring Of Incoming Calls) data to replace, set according to service provider's specific requirement:

To all HLR of user's locking that have the BOIC data or the USSD business that send at the USSD center;

The user who has the BAOC data is needed also then further to check that whether the USSD business that send at HLR or USSD center can send the terminal, promptly changes step S505 over to.

Above-mentioned steps judges promptly whether the targeted customer of USSD signaling is in the state of being under an embargo with respect to the pairing USSD business of this signaling.

If there are this user's BAOC data among the step S503 VLR; Then whether allow to start to being in user under the BAOC state that to judge whether to continue to carry out this USSD professional for the USSD business according to operator; Then continue to carry out the USSD business if allow to being in the user BAOC state under USSD business that starts.

Whether operator can be provided with in network entity and allow being in user under the BAOC state USSD business that starts.

If step S504 does not allow then to send error response instructions to HLR or USSD center to being in user under the BAOC state USSD business that starts, it is professional to stop this USSD.

If step S505 does not allow being in user under the BAOC state USSD business that starts, it is professional then to continue this USSD, issues USSD Request signaling to MS, and it is professional to accomplish this USSD.

The embodiment of the invention three provides a kind of USSD business realization system, and is as shown in Figure 6, comprising:

The calling party 1, is used to send the USSD demand signalling;

Network entity 2; Be used to receive the USSD demand signalling that calling party 1 sends; And judge whether the corresponding user of this signaling is in the state of being under an embargo with respect to request USSD business, as be in illegal state, the termination signaling of then sending this USSD demand signalling to calling party 1; As be not in illegal state, it is professional then to carry out the corresponding USSD of above-mentioned USSD demand signalling.

Wherein, network entity 2 also comprises:

USSD signaling receiver module 21 is used to receive the USSD demand signalling that calling party 1 sends;

Judge module 22 is used to judge whether the corresponding user of USSD demand signalling that USSD signaling receiver module 21 is received is in the state of being under an embargo with respect to request USSD business;

USSD signaling sending module 23 is used for being in when being under an embargo state with respect to request USSD business the user, sends to calling party 1 and stops signaling;

USSD signaling Executive Module 24 is used for not being in when being under an embargo state with respect to request USSD business the user, and it is professional to carry out this USSD.。

Wherein, judge module 22 also further comprises:

User profile sub module stored 221 is used to store user's BAOC data;

User profile recognin module 222, according to the data of user profile sub module stored 221 storage judge this user whether be in the state that is under an embargo of the USSD that asks business.

Wherein, judge module 22 also further comprises:

The USSD service code extracts submodule 223, is used for extracting the USSD service code of USSD demand signalling;

USSD service code storage submodule 224 is used to store the preset free and USSD service code data of charging;

The USSD service code is judged submodule 225; Be used for comparison USSD service code and extract USSD service code that submodule 223 extracted and USSD service code the preset USSD service code information of submodule 224 is set, the pairing USSD business of judgement USSD request instruction is coin free service or charge operation.

Wherein, judge module 22 also further comprises:

USSD SGW submodule 226 is used for according to setting, is in the user under the state of all call business of locking, forbids that HLR or USSD center are as calling party's 1 initiation USSD operation.

In practical operation, network entity 2 is MSC and/or VLR, and these improvement also should be regarded as protection scope of the present invention.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims

1. a USSD business realization method is characterized in that, may further comprise the steps:

Receive unstructured supplementary data traffic USSD demand signalling, said USSD demand signalling carries the USSD service code;

Judge whether the corresponding user of the said USSD demand signalling USSD business corresponding with respect to said USSD demand signalling is in the state of being under an embargo; Be specially: when the corresponding USSD business of said USSD demand signalling is coin free service; Or; When the corresponding user of said USSD demand signalling was not in all call business states of locking, said user's USSD business was not in illegal state; The user corresponding at said USSD demand signalling is in all call business states of locking; And the USSD business that said USSD demand signalling is corresponding is under the situation of charge operation; Or; The user corresponding at said USSD demand signalling is in all call business states of locking; And attaching position register HLR or USSD center are set to when the targeted customer is in all call business states of locking, forbid initiating as the calling party under the situation of USSD operation, and said user's USSD business is in illegal state;

If said user is in the state of being under an embargo with respect to said USSD business, then send the termination signaling of said USSD demand signalling to the calling party, forbid said business;

When if said user is not in illegal state for said USSD business, allow the professional execution of the corresponding USSD of said USSD demand signalling.

2. USSD business realization method as claimed in claim 1 is characterized in that, the determination methods whether user that said USSD demand signalling is corresponding is in all call business states of locking is specially:

Judge whether VLR Visitor Location Register VLR exists all call business BAOC data of locking of said USSD demand signalling respective user;

If there are said BAOC data, the user that then said USSD demand signalling is corresponding is in all call business states of locking;

If there are not said BAOC data, the user that then said USSD demand signalling is corresponding is not in all call business states of locking.

3. USSD business realization method as claimed in claim 1 is characterized in that, judges that whether the corresponding USSD business of said USSD demand signalling is that the method for free service is specially:

The USSD service code that more said USSD demand signalling is entrained and the USSD service code of the free or charge of presetting;

When the entrained USSD service code of said USSD demand signalling was identical with preset free USSD service code, the USSD business that said USSD demand signalling is corresponding was a coin free service; Or,

When the entrained USSD service code of said USSD demand signalling was identical with preset charge USSD service code, the USSD business that said USSD demand signalling is corresponding was a charge operation.

4. USSD business realization method as claimed in claim 3 is characterized in that, said preset USSD service code free or that charge is provided with in moving exchanging center MSC or VLR by operator in advance.

5. USSD business realization method as claimed in claim 1 is characterized in that, the termination signaling of the said said USSD demand signalling that sends to the calling party specifically comprises:

When the calling party was user terminal MS, said termination signaling was the USSD rejection signaling; Or,

When the calling party was HLR or USSD center, said termination signaling was the errored response signaling.

6. a USSD business realization system is characterized in that, comprises calling party, network entity:

Said calling party is used to send the USSD demand signalling, and said USSD demand signalling carries the USSD service code;

Said network entity; Be used to receive the USSD demand signalling that said calling party sends; And judge that whether the corresponding user of the said USSD demand signalling USSD business corresponding with respect to said USSD demand signalling is in the state of being under an embargo, and is specially: when the corresponding USSD business of said USSD demand signalling is coin free service, or; When the corresponding user of said USSD demand signalling was not in all call business states of locking, said user's USSD business was not in illegal state; The user corresponding at said USSD demand signalling is in all call business states of locking; And the USSD business that said USSD demand signalling is corresponding is under the situation of charge operation; Or; The user corresponding at said USSD demand signalling is in all call business states of locking, and attaching position register HLR or USSD center be set to when the targeted customer is in all call business states of locking, forbid initiating as the calling party under the situation of USSD operation, and said user's USSD business is in illegal state; As be in illegal state; Then send the termination signaling of said USSD demand signalling to said calling party, as be not in illegal state, it is professional then to carry out the corresponding USSD of said USSD demand signalling.

7. a network entity is characterized in that, comprises USSD signaling receiver module, judge module, USSD signaling sending module and USSD signaling Executive Module:

Said USSD signaling receiver module is used to receive the USSD demand signalling that the calling party sends, and said USSD demand signalling carries the USSD service code;

Said judge module; Be used to judge whether the corresponding user's USSD business corresponding with respect to said USSD demand signalling of USSD demand signalling that said USSD signaling receiver module is received is in the state of being under an embargo; Be specially: when the corresponding USSD business of said USSD demand signalling is coin free service; Or when the corresponding user of said USSD demand signalling was not in all call business states of locking, said user's USSD business was not in illegal state; The user corresponding at said USSD demand signalling is in all call business states of locking; And the USSD business that said USSD demand signalling is corresponding is under the situation of charge operation; Or; The user corresponding at said USSD demand signalling is in all call business states of locking; And attaching position register HLR or USSD center are set to when the targeted customer is in all call business states of locking, forbid initiating as the calling party under the situation of USSD operation, and said user's USSD business is in illegal state;

Said USSD signaling sending module is used for being in when being under an embargo state the termination signaling of sending said USSD demand signalling to said calling party with respect to said USSD business said user;

8. network entity as claimed in claim 7 is characterized in that, said judge module comprises user profile sub module stored and user profile recognin module:

Said user profile sub module stored is used to store user's BAOC data;

Said user profile recognin module, whether the data judges of storing according to said user profile sub module stored is in the professional state that is under an embargo of the corresponding USSD of said USSD demand signalling.

9. network entity as claimed in claim 8 is characterized in that, said judge module comprises that also the USSD service code extracts submodule, USSD service code storage submodule and USSD service code and judges submodule:

Said USSD service code extracts submodule, is used for extracting the USSD service code of said USSD demand signalling;

Said USSD service code storage submodule is used to store the preset free and USSD service code data of charging;

Said USSD service code is judged submodule; Be used for that said USSD service code is extracted submodule preset USSD service code information in USSD service code that said USSD demand signalling extracts and said USSD service code storage submodule and compare, judge the pairing USSD of said USSD request instruction professional be coin free service or charge operation.

10. network entity as claimed in claim 8; It is characterized in that; Said judge module also comprises USSD SGW submodule, is used for according to being arranged under the state that the user is in all call business of locking, forbids that HLR or USSD center initiate the USSD operation as the calling party.

11. network entity as claimed in claim 7 is characterized in that, said network entity is MSC and/or VLR.