CN101389138B - Calling method when applying mobile number portability service - Google Patents
Calling method when applying mobile number portability service Download PDFInfo
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- CN101389138B CN101389138B CN200810173520A CN200810173520A CN101389138B CN 101389138 B CN101389138 B CN 101389138B CN 200810173520 A CN200810173520 A CN 200810173520A CN 200810173520 A CN200810173520 A CN 200810173520A CN 101389138 B CN101389138 B CN 101389138B
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Abstract
The invention discloses a calling method when applying mobile number portable service, comprising that after receiving exchange-in message from other home networks, the gateway mobile switching center obtains routing number information of the called from the exchange-in message, and sends route inquiry information to a mobile number portable signaling relay function/number portable database MNP-SRF/NPDB supported by the local network, wherein the inquiry message is provided with the obtained routing number information of the called; after receiving the routing inquiry information, the MNP-SRF/NPDB finds out the routing number information of the called in the local NPDB, if the routing number information is not in accordance with the routing number information provided in message inquiry, discards the routing inquiry message. The invention is capable of avoiding message cycle generation problem in mobile network while implementing mobile number portable service.
Description
Technical field
The present invention relates to moving communicating field, the method for calling when relating in particular to a kind of applying mobile number portability service.
Background technology
For the better utilization Internet resources, promote competition rationally.At present, a lot of standardization bodies have all formulated the relevant criterion that mobile number carries (MNP), and mobile number carrying service is also introduced in mobile communication market, various countries one after another.
Mobile number carrying service is mainly by 3GPP 22.066 and the definition of 3GPP 23.066 protocol specifications among the 3G; It is identical therewith basically that the number of GSM (Global System for Mobile Communications, global system for mobile communications) network carries implementation.According to the description of agreement, the MNP function comprises SRF (signaling relay function) mode and IN mode.The SRF mode adopts the relevant signaling of MAP as the basic means that realizes MNP, and the IN mode adopts the basic means of intelligent network message mode as MNP.
For the SRF mode, protocol description interface relationship, the working method between the relevant devices such as GMSC (mobile gateway switching center) network element, MNP-SRF/NPDB (supporting signaling relay function/number portability database of MNP) equipment, HLR (attaching position register) network element.Comprise the operating procedure that should carry out, signaling process etc. problem, solved well that user's number carries problem in the mobile communications network.
After number portability service took place, the called subscriber possibly change net, has been not this network users, and at this moment, HLR just can't inform the roaming number that GMSC is called, and GMSC just can't call out route, thereby the influence calling normally continues.Through introducing number portability database NPDB (number portability database), head it off smoothly.In NPDB, deposit all users' home network information, through inquiry NPDB just can know the user current be which network of ownership, should inquire about called subscriber's roaming number to HLR of which network during calling.
When number portability service takes place in certain user, shift out among the NPDB of network and revise data configuration, change this User Status into his network users by this network users (or carrying access customer), and write down the routing number RN that this user moves into network; Simultaneously, the NPDB that moves into network also revises data configuration, changes this User Status into this network users (or carrying access customer) by his network users.
Here RN refers to Routing Number routing number, is used for indicating the affiliated network of user's reality, uses when calling out route.
The handshaking procedure of calling out under the normal conditions is: receive call for ask after; GMSC sends SRI (route requests) message to HLR; Inquire about called routing iinformation, HLR inquires about called position to VLR, obtains called roaming number; Return called roaming number through SRI_ACK (route requests response) to GMSC again, GMSC routes the call to corresponding VMSC (visited mobile services switching center) in view of the above and accomplishes call proceeding.
The signaling message that the SRF mode relates to mainly comprises:
SRI:Send Routeing Information sends route requests;
SRI-ACK:Send Routeing Information acknowledge sends the route requests response;
IAM:Initial Address Message initial address message.
Briefly the MNP operation principle of SRF mode is exactly:
Receive call for ask after; GMSC is not the routing iinformation that directly sends SRI information query called subscriber to HLR; But send SRI message to MNP-SRF/NPDB earlier, inquiry called subscriber's current home network information is carried out next step according to Query Result in NPDB.
If this network users, the whole process of then calling out is as shown in Figure 1, comprising:
101, work the IAM message of exhaling the switch transmission to carry called subscriber MSISDN (The Mobile Station ISDNnumber, travelling carriage comprehensive service digital net number) and give GMSC B;
102, GMSC B sends the SRI message of carrying MSISDN to MNP-SRF/NPDB;
103, inquiry called subscriber's current home network information in NPDB confirms that the called subscriber is this network users; MNP-SRF/NPDB routes the call to the HLRB of user attaching;
104, the called routing iinformation of HLR B inquiry, through SRI-ACK message, the roaming number MSRN that directly returns the called subscriber gives GMSC B;
105, GMSC B routes the call to VMSC B in view of the above;
106, VMSC B accomplishes call proceeding, calls out called subscriber MS (travelling carriage) B.
If the called subscriber carries for number takes place, change the user of net to other networks, the whole process of then calling out is as shown in Figure 2, comprising:
201, calling subscriber MS A rises and exhales VIMC A;
202, VIMC A sends the IAM message of carrying called subscriber's Mobile Subscriber International ISDN Number and gives GMSC A;
203, GMSC A sends the SRI message of carrying MSISDN to MNP-SRF/NPDB;
204, MNP-SRF/NPDB inquires about called subscriber's current home network information in NPDB, confirms that the called subscriber carries for number takes place, and changes the user of net to other networks; MNP-SRF/NPDB returns SRI_ACK message to GMSC A, belongs to the routing number RN and the Mobile Subscriber International ISDN Number of network comprising the called subscriber;
205, the user that returns according to MNP-SRF/NPDB of GMSC A belongs to the routing number RN of network, sends IAM message and routes the call to called place network G MSC B, and wherein called number is RN+MSISDN;
206, GMSC B sends the SRI message of carrying MSISDN to MNP-SRF/NPDB, and inquiry called subscriber's current home network information confirms that the called subscriber is this network users in NPDB;
207, MNP-SRF/NPDB routes the call to the HLR of user attaching;
208, the called routing iinformation of HLR inquiry through SRI-ACK message, directly returns called roaming number and gives GMSC B;
209, GMSC B routes the call to end office (EO) in view of the above, accomplishes call proceeding by end office (EO).
Because the IN mode can't realize the correlation function of the supplementary service of mobile communications network; So; What all adopt when introducing number portability service in the general mobile communications network is the SRF mode, and the thinking of prevention message circulation is also similar basically with SRF, and the IN mode is not just repeated to have introduced here.
The problem that prior art exists is:
When the enforcement mobile number carries; Relate to and move into/shift out two mobile networks'; Two different mobile numbers carry database (MNP-SRF/NPDB); Need shift out among the NPDB of network and revise data configuration, change this User Status into his network users by this network users (or carrying access customer), and write down the routing number RN that this user moves into network; Simultaneously, the NPDB that moves into network also revises data configuration, changes this User Status into this network users (or carrying access customer) by his network users.
In this operating process, data collocation error might take place: the data that promptly shift out among the NPDB of network are that this user shifts out, and are his network users; And the data in the immigration network are not revised, and still keeping this user is original record of his network users.
Like this, the NPDB of two networks thinks that this user is the user of bipartite network, when calling out generation; The NPDB of two networks can return the SRI-ACK message that has bipartite network RN to GMSC; GMSC will be routed to bipartite network with inferior calling in view of the above repeatedly, form message circulation, constantly consumption of network resources; As shown in Figure 3, calling procedure comprises:
301, calling subscriber MS A rises and exhales VIMC A;
302, VIMC A sends the IAM message of carrying called subscriber's Mobile Subscriber International ISDN Number and gives GMSC A;
303, GMSC A sends the SRI message of carrying MSISDN to MNP-SRF/NPDB;
304, MNP-SRF/NPDB inquires about called subscriber's current home network information in NPDB, confirms that the called subscriber carries for number takes place, and changes the user of net to other networks; MNP-SRF/NPDB returns SRI_ACK message to GMSC A, belongs to the routing number RN (sensing is carried into network) and the Mobile Subscriber International ISDN Number of network comprising the called subscriber;
305, user's routing number RN of returning according to MNP-SRF/NPDB of GMSC A sends IAM message and routes the call to called place network G MSC B, and wherein called number is RN+MSISDN;
306, GMSC B sends the SRI message of carrying MSISDN to MNP-SRF/NPDB, and inquiry called subscriber's current home network information is confirmed non-network users of called subscriber in NPDB;
307, MNP-SRF/NPDB returns SRI-ACK message to GMSC B, carries the RN (sensing carries out network) and the Mobile Subscriber International ISDN Number at called subscriber place in the message;
308, GMSC B routes the call to called place network G MSC A according to user's routing number RN that MNP-SRF/NPDB returns.
It is thus clear that because the NPDB data configuration is incorrect, system is repeating step 303～308 always, forms message circulation.
In order to prevent that such phenomenon from taking place; Agreement has been stipulated the method for a prevention message route: in the XUDT of signaling SCCP (connection control section) layer protocol (the unit data message of enhancing); The hop counter parameter is set, and message does not have through this network element once, and the hop counter in the XUDT message just subtracts one; When the technological device of jumping was 0, message was dropped.
But this method has two serious defectives:
(1) when general calling routing inquiry SRI, use all be UDT (unit data message), can not use XUDT message, and UDT message does not have the hop counter parameter.That is to say that if current now message related to calls flow process is not done revision use XUDT message by using UDT message to change into, so, this method is actual can't be used;
(2) even current now message related to calls flow process is made (1) middle revision of describing; Reduced to before 0 in the hop counter value of waiting for XUDT message so; Still can produce repeatedly the message circulation between two mobile networks; This means between two Mobile Network Operator to produce a plurality of unnecessary interworking between network message, produce unnecessary closing the account, increase the operating cost of operator.
Summary of the invention
Method of calling when the technical problem that the present invention will solve provides a kind of applying mobile number portability service can avoid producing among the mobile network message circulation problem when implementing mobile number and carry (MNP) technology.
In order to address the above problem; Method of calling when the invention provides a kind of applying mobile number portability service; Comprise: after the incoming call message that other home network sends is received by mobile gateway switching center; From this incoming call message, obtain called subscriber's routing number information; And send routing inquiry message to signaling relay function/number portability database MNP-SRF/NPDB that the support mobile number of Home Network carries, in this routing inquiry message, carry the said called subscriber's who is obtained routing number information;
After said MNP-SRF/NPDB receives said routing inquiry message; In this NPDB, find said called subscriber's routing number information; If the routing number information inconsistency that carries in routing number information that is found and the said routing inquiry message then abandons said routing inquiry message.
Further; After said mobile gateway switch is received the incoming call message that other home network sends; Also from this incoming call message, obtain called subscriber's travelling carriage comprehensive service digital net number, and in the routing inquiry message of the MNP-SRF/NPDB that sends to Home Network, carry the called subscriber's who is obtained travelling carriage comprehensive service digital net number;
In this NPDB,, search called subscriber's routing number information according to called subscriber's entrained in the said routing inquiry message travelling carriage comprehensive service digital net number.
Further, the routing number information inconsistency that carries in routing number information that is found and the said routing inquiry message specifically is meant:
It is this network users that the routing number information of carrying in the said routing inquiry message is indicated said called subscriber, and it is not this network users that the routing number information that is found is indicated said called subscriber.
Further, described method of calling also comprises: said mobile gateway switch is not received the routing query response message of said MNP-SRF/NPDB in the given time, then discharges this calling.
Further, during said mobile gateway switch call release, the value of release cause field is extended this as the routing number query timeout.
Further, said routing number information belongs to the network No. of home network for the called subscriber.
Further, said incoming call message is initial address message.
Method of calling as claimed in claim 7 is characterized in that, further, before the Incoming initial address message that other home network sends is received by mobile gateway switching center, also comprises:
After the mobile gateway switch that carries out network is received calling, send routing inquiry message to the MNP-SRF/NPDB of Home Network, the inquiry called subscriber belongs to network, carries said called subscriber's travelling carriage comprehensive service digital net number in the message;
The MNP-SRF/NPDB that carries out network inquires the called subscriber when being the user of other home network; Mobile gateway switching center to Home Network returns routing query response message, wherein carries said called subscriber's routing number information and called subscriber's travelling carriage comprehensive service digital net number;
Carry out the routing number information of the mobile gateway switching center of network according to said called subscriber; Mobile gateway switch to carrying into network sends initial address message, in this initial address message, carries said called subscriber's routing number information and travelling carriage comprehensive service digital net number.
Further; Described method of calling also comprises: if the routing number information of carrying in the routing number information that is found and the routing inquiry message of being received is consistent, then said MNP-SRF/NPDB routes the call to the attaching position register of said called subscriber's ownership of Home Network;
Said attaching position register is inquired about said called subscriber's routing iinformation, and through routing query response message, the roaming number that directly returns said called subscriber is given said mobile gateway switching center;
Said mobile gateway switching center routes the call to end office (EO) in view of the above, accomplishes call proceeding by end office (EO).
The present invention is directed to mobile communications network when carrying out mobile number carrying service, is the calling route messages circulation of avoiding causing owing to NPDB database data configuration error, thus consumption of network resources; Increase the problem of operator's operating cost, make full use of original call flow and each item message wherein, reduce transformation as far as possible existing business; Data comparison process when reasonably enquiry number being carried database, seamless being inserted in original call flow, whether the RN in the SRI message of relatively receiving through the MNP-SRF/NPDB that moves into network is consistent with the RN in the notebook data storehouse; Whether decision continues the subsequent voice calls flow process; Avoided message circulation, solved because NPDB database data configuration error causes producing in the network message circulation; The unnecessary consumption Internet resources increase operation mountain operating cost problem.In the scheme basically not to the change of existing call flow process, signaling message; Reduction is to the function modifications requirement of existing network element; The routing plan of making rational planning for reduces network load, helps operator and carries out mobile number carrying service rapidly; Easily tackle possible fortuitous event, and have good exploitativeness and operability.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is under the existing protocol regulation SRF mode, calls out this network users or carry to move into user's sketch map;
Fig. 2 is under the existing protocol regulation SRF mode, when the NPDB data configuration is correct, calls out to carry and shifts out user's sketch map;
Fig. 3 is under the existing protocol regulation SRF mode, when the NPDB data configuration is incorrect, calls out to carry and shifts out the sketch map that the user produces message circulation;
Fig. 4 is the schematic flow sheet of exemplifying embodiment of the present invention.
Embodiment
To combine accompanying drawing and embodiment that technical scheme of the present invention is explained in more detail below.
Method of calling when the invention provides a kind of applying mobile number portability service can prevent the circulation of MNP message related to calls, comprising:
GMSC receives that the incoming call message that other home network is sent (is generally IAM message; Do not get rid of during practical application yet and be other message) after; From this incoming call message, obtain called subscriber's RN information; And, in this SRI message, carry the called subscriber's who is obtained RN information to the MNP-SRF/NPDB of Home Network transmission SRI message;
After said MNP-SRF/NPDB receives said SRI message, in this NPDB, find said called subscriber's RN information, if the RN information inconsistency that carries in RN information that is found and the said SRI message then abandons said SRI message.
Wherein, called subscriber's RN information refers generally to the network No. that the called subscriber belongs to home network, does not also get rid of other sign that belongs to home network for the called subscriber during practical application.
During the explanation of RN information inconsistency in the said database in called subscriber's RN information and the said SRI message is carried bunch in the NPDB database of certain network the present home network information of this user incorrect, proceed so should forbid this calling.
Said method of calling can also comprise:
GMSC also obtains called subscriber's Mobile Subscriber International ISDN Number, and in the SRI of the MNP-SRF/NPDB that sends to Home Network message, carries the called subscriber's who is obtained Mobile Subscriber International ISDN Number after receiving the incoming call message that other home network sends from this incoming call message;
The RN information that in this NPDB, finds said called subscriber specifically can be meant:
In this NPDB,, search called subscriber's RN information according to called subscriber's entrained in the said SRI message Mobile Subscriber International ISDN Number.During practical application, do not get rid of yet and utilize alternate manner in NPDB, to find called subscriber's RN information.
Wherein, The RN information inconsistency that carries in RN information that is found and the said SRI message specifically is meant: it is this network users that the RN information of carrying in the said SRI message is indicated said called subscriber, and it is not this network users that the RN information that is still found is indicated said called subscriber.
Optional, said method of calling also comprises:
Said GMSC does not receive the SRI-ACK message of MNP-SRF/NPDB in the given time, then discharges this calling.
Optional, during said GMSC call release, the value of release cause field is extended this as the RN query timeout.
Optional, in the said method of calling,, GMSC also comprises before receiving the incoming call message that other home network sends:
After the mobile gateway switch GMSC that carries out network receives calling, send routing inquiry message to the MNP-SRF/NPDB of Home Network, the inquiry called subscriber belongs to network, carries said called subscriber's MSISDN (also can select to carry the RN-A of Home Network) in the message;
When the MNP-SRF/NPDB Query Database that carries out network finds that the called subscriber is other home network (such as the B net) user; Return routing query response message SRI-ACK to the GMSC of Home Network, wherein carry said called subscriber's RN information and called subscriber's MSISDN; Said RN information is generally the network No. of B net;
The GMSC that carries out network routes the call to the user and belongs to home network that---being the B net---promptly sent the IAM message of carrying said called subscriber RN information and MSISDN to the mobile gateway switch GMSC that carries into network here according to said called subscriber's RN information.
Optional; Said method of calling also comprises: if the RN information of carrying in the said called subscriber's who in this NPDB, finds RN information and the SRI message of being received is consistent; Explain that the present home network information of said called subscriber is correct, then carry out the subsequent calls flow process, comprising:
Said MNP-SRF/NPDB routes the call to the HLR of said called subscriber's ownership of Home Network;
Said HLR inquires about said called subscriber's routing iinformation, and through SRI-ACK message, the roaming number MSRN that directly returns the called subscriber gives said GMSC;
GMSC routes the call to end office (EO) in view of the above, accomplishes call proceeding by end office (EO).
In sum, have following characteristics according to the method for the invention:
Require GMSC to be supported in when routing inquiry message (SRI) is sent in the NPDB inquiry, not only carry called subscriber's Mobile Subscriber International ISDN Number, and carry RN information; And NPDB also wants to handle the called number of RN+MSISDN form, and whether the data that dispose in the RN information of receiving with inspection (actual is exactly the data that he nets the NPDB configuration) and the notebook data storehouse are consistent; Existing function to other all network elements in the existing network has no extra requirement.
Utilize existing SRI message to carry RN, very low for the upgrading requirement of relevant device, implement also very easy, help the rapid enforcement of scheme, reduce the correlative investment cost.For other relevant links that original mobile number carries call flow, the number that can stipulate according to existing protocol fully carries call flow to carry out, and convenient understanding is implemented.
Further explain with an applying examples of the present invention below.
Applying examples one is as shown in Figure 4, comprising:
401, calling subscriber MS A rises and exhales VIMC A;
402, VIMC A sends the IAM message of carrying called subscriber's Mobile Subscriber International ISDN Number and gives GMSC A;
403, GMSC A receives as after going into to call for the IAM message of asking, and sends the SRI message of carrying MSISDN to MNP-SRF/NPDB, inquiry called subscriber's current home network;
404, MNP-SRF/NPDB is according to called subscriber's Mobile Subscriber International ISDN Number inquiry NPDB, and the result is for carrying out the user, and then MNP-SRF/NPDB sends SRI-ACK message to GMSCA, wherein carries the routing number RN and the Mobile Subscriber International ISDN Number of called place network;
405, user's routing number RN of returning according to MNP-SRF/NPDB of GMSC A sends IAM message and routes the call to called current place network G MSC B, and wherein called number is RN+MSISDN;
406, after GMSC B receives the Incoming IAM message that GMSC A sent, send the SRI message of carrying MSISDN to MNP-SRF/NPDB, inquiry called subscriber's current home network information is wherein carried said RN+MSISDN;
When the NPDB data configuration was incorrect, RN in the SRI message that the NPDB inspection is received and this user's in the own database RN were inconsistent, then abandon this SRI message; GMSC B does not receive SRI-ACK message within a certain period of time, then discharges this calling; GMSCB can extend this as the RN query timeout with the release cause of giving GMSC A when discharging this calling.Thus it is clear that, can avoid producing the problem of message circulation like this.
Should be appreciated that at this, in the agreement predetermined process mode, do not require during networking that GMSC must carry RN when sending SRI message, also can not carry RN.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for calling a during applying mobile number portability service comprises:
After the incoming call message that other home network sends is received by mobile gateway switching center; From this incoming call message, obtain called subscriber's routing number RN and called subscriber's travelling carriage comprehensive service digital net number MSISDN; And send routing inquiry message to signaling relay function/number portability database MNP-SRF/NPDB that the support mobile number of Home Network carries, in this routing inquiry message, carry said RN and the MSISDN that is obtained;
After said MNP-SRF/NPDB receives said routing inquiry message; In this NPDB, find said called subscriber's routing number RN according to entrained MSISDN in the said routing inquiry message; If the routing number RN that carries in routing number RN that is found and the said routing inquiry message is inconsistent, then abandon said routing inquiry message.
2. method of calling as claimed in claim 1 is characterized in that, the routing number RN that carries in routing number RN that is found and the said routing inquiry message is inconsistent specifically to be meant:
It is this network users that the routing number RN that carries in the said routing inquiry message indicates said called subscriber, and it is not this network users that the routing number RN that is found indicates said called subscriber.
3. according to claim 1 or claim 2 method of calling is characterized in that, also comprises:
Said mobile gateway switching center does not receive the routing query response message of said MNP-SRF/NPDB in the given time, then discharges this calling.
4. method of calling as claimed in claim 3 is characterized in that:
During said mobile gateway switching center call release, the value of release cause field is extended this as the routing number query timeout.
5. according to claim 1 or claim 2 method of calling is characterized in that:
Said routing number RN belongs to the network No. of home network for the called subscriber.
6. according to claim 1 or claim 2 method of calling is characterized in that:
Said incoming call message is initial address message.
7. method of calling as claimed in claim 6 is characterized in that, before the Incoming initial address message that other home network sends is received by mobile gateway switching center, also comprises:
After calling is received by the mobile gateway switching center that carries out network, send routing inquiry message to the MNP-SRF/NPDB of Home Network, the inquiry called subscriber belongs to network, carries said called subscriber's travelling carriage comprehensive service digital net number MSISDN in the message;
The MNP-SRF/NPDB that carries out network inquires the called subscriber when being the user of other home network; Mobile gateway switching center to Home Network returns routing query response message, wherein carries said called subscriber's routing number RN and called subscriber's travelling carriage comprehensive service digital net number MSISDN;
Carry out the routing number RN of the mobile gateway switching center of network according to said called subscriber; Mobile gateway switching center to carrying into network sends initial address message, in this initial address message, carries said called subscriber's routing number RN and travelling carriage comprehensive service digital net number MSISDN.
8. according to claim 1 or claim 2 method of calling is characterized in that, also comprises:
If the route RN information of carrying in the routing number RN that is found and the routing inquiry message of being received is consistent, then said MNP-SRF/NPDB routes the call to the attaching position register of said called subscriber's ownership of Home Network;
Said attaching position register is inquired about said called subscriber's routing iinformation, and through routing query response message, the roaming number that directly returns said called subscriber is given said mobile gateway switching center;
Said mobile gateway switching center routes the call to end office (EO) in view of the above, accomplishes call proceeding by end office (EO).
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| CN200810173520A CN101389138B (en) | 2008-10-31 | 2008-10-31 | Calling method when applying mobile number portability service |
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| CN101720116B (en) * | 2009-05-13 | 2012-09-05 | 中兴通讯股份有限公司 | Method and system for implementing latching service |
| CN101998319A (en) * | 2009-08-19 | 2011-03-30 | 中兴通讯股份有限公司 | Filtering method and system of GMSC (Gateway Mobile Switching Center) |
| CN102651859B (en) * | 2012-05-09 | 2015-02-04 | 中国联合网络通信集团有限公司 | Method, equipment and network for identifying of operator ownership of number portability users |
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Non-Patent Citations (1)
| Title |
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| 汪云华.阿尔卡特朗讯移动号码携带实现方案.《电信网技术》.2007,(第12期), * |
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