CN1558694A - Method for implementing international roaming of prepaid subscriber between two isomeric networks - Google Patents
Method for implementing international roaming of prepaid subscriber between two isomeric networks Download PDFInfo
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Abstract
The invention relates to a method for realizing international roaming for pre-payment subscribers between two networks with different mechanisms, wherein one mobile network employs CAMEL2 technique for providing pre-payment services, whose MSC possesses SSF capacity, and no.7 instruction based CAMEL2 application protocol CAP2 is employed between the MSC/SSP and SCP, the other mobile network employs Non-CAMEL technique for providing pre-payment services.
Description
Technical field
The present invention relates to the implementation method of the international roaming of a kind of prepaid user between two kinds of heterogeneous networks, belong to the value-added service technical field of telecommunications gsm cellular.
Background technology
Mobile prepaid service is based on the new business of the 900/1800MHz common number mobile communication of ETSI GSM standard.Whether prepayment service will determine to accept or refuse to call out based on user's account when call setup, and in calling procedure real time billing and supervising connections for calling, again when end of calling in the account of user's prepayment the current telephone expenses of deduction.
Because each is different for the ability of the intelligent movable fidonetFido that the moving exchanging center MSC of various countries mobile operator is supported, therefore, the network mobile prepaid service of most of country does not provide the international roaming service in the world at present.Some network (for example mobile operator in Hong Kong) that international pre-payment roaming service is provided is to adopt the USSD order to add the clawback mode, (for example, the mobile operator of China's Mainland) did caller and breathes out when it can only provide the mobile pre-paying user roaming of Home Network to enter accesses network.
For example the professional mode that adopts of the prepaid card that provides of the mobile operator in Hong Kong is service node (SN, Service Node) or be the Intellight network mode of the customization service logic (CustomizedApplication for Mobile network Enhanced Logic) that strengthens of a kind of mobile network, this paper is referred to as CAMEL1.And the moving exchanging center MSC of China Mobile/service switching point is supported is the Intellight network mode of the customization service logic that strengthens of another kind of mobile network, and this paper is referred to as CAMEL2.Therefore they all can not support the normal roaming of Hong Kong prepaid user to the China's Mainland.In order to satisfy some prepaid users' needs, Hong Kong part Mobile Network Operator provides a kind of USSD order to add the technology of clawback, can breathe out as caller when making the mobile pre-paying user in Hong Kong roam in China.
Introduce the operation flow that this USSD order adds clawback referring to Fig. 1, heavy line is represented voice speech channel among the figure, and fine dotted line is represented USSD message:
(1) Hong Kong prepaid user roams into the continent, and desire is called out local fixed telephone subscriber, sends the MSC of USSD message to local access network, and request makes a call;
(2) MSC of reception USSD is sent to this message the GSM network in Hong Kong through China Mobile's GSM network;
(3) the GSM network in Hong Kong is sent to the prepayment service node that this user belongs to this USSD message, through being identified as making a call of roamer, handles accordingly;
(4) initiate the internally called calling of fixed network by Hong Kong, the calling subscriber of clawback roaming simultaneously;
(5) the GSM net of China Mobile is connected caller and called users respectively with the fixed-line telephone network PSTN of China, both sides' conversation.
From the implementation of above-mentioned this services of roaming as can be seen, the mode that this USSD adds clawback not only user uses very inconveniently, and route is circuitous; Promptly most valuable Internet resources have been wasted in speech channel that local call but needs to set up two sections international long-distances originally greatly.Moreover, aspect rate,,, be unfavorable for the further expansion of prepaid card business because this irrational business realizing mode need take two international lines and cause the service charging costliness for Hong Kong Virtual network operator.
In addition, the pre-payment of the GSM of present China's Mainland net all is based on the realization of CAMEL2 technology.If international pre-payment roaming between the net in realization country variant/area needs both sides' network all to support same CAMEL2 ability usually.Yet the GSM net of at present a lot of country /region is not supported CAMEL2, and even support CAMEL2, the CAMEL2 version in version that it adopted and continent also may there are differences, and can not directly interconnect.If make both sides' network possess identical CAMEL ability, need transform to network, gigantic project, moving exchanging center MSC and attaching position register HLR also will upgrade, and invest hugely, implement long in time limit.
In a word, from present services of roaming implementation as can be seen, the mode that USSD adds clawback has many drawbacks, use inconvenience (to need first photos and sending messages to give the USSD server as the user, and then wait for and connecting), and the not incoming call of support prepaid, moreover this mode will take the resource of two international lines, the service rate costliness that causes this mode is unfavorable for professional further developing.And if adopt upgrading both sides network to support the method for CAMEL2 simultaneously, invest hugely, implement long in time limit.Therefore, the international roaming problem that how to solve the mobile pre-paying user just becomes one of difficult problem that always perplexs mobile operator for many years.
Summary of the invention
The implementation method that the purpose of this invention is to provide the international roaming of a kind of prepaid user between two kinds of heterogeneous networks, this method has solved an above-mentioned difficult problem preferably, do not need conventional network equipment is carried out big upgrading or change just allowing the international roaming service of realization prepaid user between two kinds of heterogeneous networks, the routing mode of this method is reasonable, saved the international line resource greatly, thereby reduced the service fee of pre-payment international roaming, and flexible function, can adapt to the complexity and the polytropy of roaming network, transfer survey and maintenance cost that bigger advantage is also arranged.
The object of the present invention is achieved like this: the implementation method of the international roaming of a kind of prepaid user between two kinds of heterogeneous networks, it is the prepaid user realizes international roaming between the GSM mobile network of two kinds of different pre-payment implementation methods method, one of them mobile network provides prepayment service with a kind of CAMEL2 of being called as technology, its MSC has the SSF ability, adopt application protocol CAP2 between MSC/SSP and SCP, be referred to as the A net based on the CAMEL2 of signalling system No.7; Another mobile network adopt with A net different, be called as the Non-CAMEL technology prepayment service be provided, the technology of its use is based on the intelligent network CS1 of intelligent network capability set 1, or be called as the intelligent network of the customization service logic that the GSM mobile network of CAMEL1 strengthens based on another kind, or based on the intelligent network of the CAMEL2 of A net different editions, or the ISDN User Part of the non intelligent net of employing service node mode, be referred to as the B net; It is characterized in that: a roaming broker device is set in the Non-CAMEL network, this roaming broker device analog service exchange point SSP and service control point (SCP), SCP gateway with CAMEL2 ability and/or MSC/SSP gateway as the A net of supporting the various protocols conversion, guarantee interconnecting between the Non-CAMEL network equipment and the CAMEL2 network equipment, thereby support the two-way pre-payment services of roaming between these two different isomerization networks.
Described protocol conversion is to be called as the intelligent network CAMEL1 of the customization service logic that the GSM mobile network of CAMEL1 strengthens or to be the agreement CAP2 of A net CAMEL2 version based on the protocol conversion with the intelligent network CAMEL2 version of the CAMEL2 of A net different editions based on the ISDN User Part mode of non intelligent net or based on the intelligent network CS1 of intelligent network capability set or based on another kind in the B net, thereby realizes adopting the agreement of different editions to communicate between the SCP of different mobile operator and the MSC/SSP; Described roaming broker device possesses the function of SSP gateway and SCP gateway simultaneously, can realize bi-directional roaming.
When prepaid user's roaming of B network enters the A network, described roaming broker device is as the MSC/SSP gateway of A network side simulation SCP function, adopt the CAP2/SS7 interface protocol MSC/SSP direct and the A net of A net interconnected, this roaming broker device is connected by the interior prepayment service platform of internal interface and B net, perhaps directly handle the service logic of prepayment service, finish the control and the real time billing of calling; At this moment, the attaching position register HLR of B net supports the CSI CAMEL-Subscription-Information ability of CAMEL2, and the SCP address in pre-payment international roaming user's the CSI information is appointed as the roaming broker device.
Calling when prepaid user's roaming of described B network enters the A network is divided into two kinds: the MO that this prepaid user initiates as caller calls out and this prepaid user calls out as the called MT that answers; When this prepaid user when called, its MT call flows is the same with its processing method at the B network of ownership, need not be through the processing of roaming broker device, its call proceeding and real time billing are all realized voluntarily by the MSC of B net and service node or accounting server; And when this B net prepaid user roaming enters A net initiation MO calling, the MSC/SSP of A net will call out to trigger according to user's O-CSI CAMEL-Subscription-Information and report to the roaming broker device, by the advanced charge user data in the prepayment service node/accounting server of this roaming broker device inquiry B net, account balance and call rate according to this user determine whether continue or refuse this calling, and real time billing.
Described B net prepaid user roaming enters the MO call flows of initiating as caller behind the A network and comprises the following steps:
(1) prepaid user's roaming of B net enters the A net, carries out the position and upgrades;
(2) the B net attaching position register HLR under the Visited Location Registor VLR of A net and/or moving exchanging center MSC and/or service switching point and this user carries out the position renewal alternately;
(3) B net location register HLR returns this user profile to A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point, comprises making a start CAMEL subscription information O-CSI data and insert this user profile in A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point;
(4) this user makes a call as caller at the A net;
(5) intelligent call is triggered according to O-CSI in A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point, and to the SCP of O-CSI appointment gateway, promptly the roaming broker device sends and calls out control request;
(6) this roaming broker device uses the API of appointment to report the prepayment service node/accounting server of B net, and real time billing is carried out in request;
(7) service node/accounting server of B net is accepted or the refusal calling according to the situation indication of user account remaining sum;
(8) if call authorization is successful, then the Visited Location Registor VLR of roaming broker device indication A net and/or moving exchanging center MSC and/or service switching point are done further and are continued.
(9) the corresponding operation that continues is carried out to called number, to finish calling according to the connection indication of roaming broker device in the Visited Location Registor VLR of A net and/or moving exchanging center MSC and/or service switching point.
This roaming broker device uses the API of appointment to report the prepayment service node/accounting server of B net in the described step (6), and when real time billing was carried out in request, available three kinds of modes and service node/accounting server carried out alternately:
(A) immediate data storehouse access way: when inquiry advanced charge user data, the database of direct access service node/accounting server, do not need service node/accounting server that any external interface is provided, its advantage is the investment that can save the roaming broker facility database, does not need service node/accounting server is done any change;
(B) database synchronization mode: this roaming broker device is provided with database, and the database of this database and service node/accounting server keeps synchronously, the roaming broker device is as long as the database of inquiry oneself just can obtain prepaid user's data like this, thereby continuing of controlling call, its advantage is: do not need service node/accounting server is done big change;
(C) Kai Fang api interface: the opening API that roaming broker provides by service node/accounting server realizes the data access to the prepaid user, thereby finish control to calling out, its advantage is: whole system has higher fail safe and flexibility, but need do certain change to service node/accounting server, require it to the roaming broker open interface.
When prepaid user's roaming of A network enters the B network, described roaming broker device is connected with the MSC of B net and the SCP of A net respectively as the SCP gateway, realize the conversion of various communication protocols in the B net and be responsible for receiving the trigger request that MO that B net MSC initiates in the B net the A network users calls out, and will be forwarded in the A net SCP accordingly from the call request of B net; This call request reports by CS1 INAP or CAMEL1 or with the CAMEL2 interface protocol of A net different editions; If when the MSC of B net did not support any intelligent network protocol, this roaming broker device then adopted the ISUP interface to communicate by letter with the MSC that B nets; The roaming broker device is netted the CAMEL2 agreement CAP2 that call request that MSC sends converts the A net to B, realizes real-time calling control and charging.
Calling when prepaid user's roaming of described A network enters the B network is divided into two kinds: the MO that this prepaid user initiates as caller calls out and this prepaid user calls out as the called MT that answers; When this prepaid user when called, its MT call flows is the same with its processing method in home network B net, need not be through the processing of roaming broker device, its call proceeding and real time billing are by the MSC of A net and provide the SCP of prepayment service to realize voluntarily; And when this A net prepaid user roaming enters B net initiation MO calling, B net MSC is reported to the roaming broker device that is provided with in the B network according to the trigger request of travelling carriage integrated services digital network MSISDN (Mobile StationInternational ISDN Number) or international mobile station identity IMSI (International MobileSubscriber Identity) number segment or O-CSI CAMEL-Subscription-Information are initiated this A network users in the B net MO calling, this roaming broker device adopts the CAP2/SS7 interface protocol of A net to be reported to A to net corresponding SCP this calling to handle then, whether SCP inquires about this prepaid user's account information and controls the roaming broker device and continue or refuse this calling, and real time billing; This roaming broker adopts the INAP CS1 of B net or the MSC of CAP1 or CAP2 or ISDN User Part control B net to continue, and finishes whole calling according to the instruction of SCP.
Described A net prepaid user roaming enters the MO call flows of initiating as caller behind the B network and comprises the following steps:
(1) A net prepaid user makes a call as caller at the B net;
(2) MSC of B net reports call request according to number segment or O-CSI CAMEL-Subscription-Information to the roaming broker device;
(3) the roaming broker device adopts CAP2 calling to be reported to the user attaching service control point (SCP) of A net;
(4) this user account information is inquired about according to call request in this service control point (SCP), and judges whether to accept or the refusal calling;
(5) if call out to accept, then the MSC of roaming broker device indication B net with call proceeding to the called subscriber.
(6) MSC to the called subscriber, finishes call proceeding with call proceeding.
The technical characterstic of the inventive method is to have designed an inter-network roaming agent apparatus for the international roaming prepayment service between two kinds of heterogeneous networks, this roaming broker device is arranged on the Non-CAMEL network side, can simulate SSP and SCP individually or simultaneously, SCP gateway and/or MSC/SSP gateway as the CAMEL2 network, support the intelligent network protocol of different editions, ISDNYong Hubufen (ISUP, ISDN User Part) conversion between agreement and CAMEL2 agreement, the conversion of suggestion voice identification number also is provided, be responsible for adopting the agreement of different editions to communicate with SCP and the MSC/SSP of different mobile operator, thus do not need to the conventional network equipment of Non-CAMEL network operation business carry out big upgrading or change just can allow this Non-CAMEL (for example B net of the GSM mobile operator in Hong Kong) operator provides and CAMEL2 (for example A net of China's Mainland GSM mobile operator) between the pre-payment international roaming service.The prepaid user that roaming broker device of the present invention not only can solve the Non-CAMEL network roams the pre-payment services of roaming that enter the CAMEL2 network, also supports the prepaid user of CAMEL2 network to roam the pre-payment services of roaming that enter the Non-CAMEL network simultaneously.
Method of the present invention does not need the equipment of operator's existing network is carried out big upgrading or change, invests for a short time, implements very convenient, and the duration is short, and the international roaming service of pre-payment can be provided soon.And the routing mode of this method is reasonable, has saved the international line resource greatly, thereby has reasonably reduced the expense of pre-payment roaming.Simultaneously, flexible function of the present invention can adapt to the complexity and the diversity of Non-CAMEL network, compares with other schemes, and accent of the present invention is surveyed and maintenance cost has bigger advantage.Therefore the present invention has good application prospects.
Description of drawings
Fig. 1 is the USSD round about manner schematic diagram of the prepaid card roaming of prior art.
Fig. 2 is roaming broker device of the present invention is realized international roaming between the GSM of two kinds of different prepayment modes mobile network a networking schematic diagram.
Fig. 3 is the MO call flow diagram that B network users of the present invention roams to the A net.
Fig. 4 is that roaming broker device of the present invention directly inserts B net pre-payment node database mode schematic diagram.
Fig. 5 is roaming broker facility database of the present invention and prepayment service node method of synchronization schematic diagram.
Fig. 6 is that roaming broker device of the present invention inserts prepayment service node mode schematic diagram by opening API.
Fig. 7 is A of the present invention net prepaid user roaming broker device networking schematic diagram when roaming to the B net.
Fig. 8 is the MO call flow diagram that A net prepaid user of the present invention roams to the B net.
Embodiment
The present invention is the implementation method of the international roaming of a kind of prepaid user between two kinds of heterogeneous networks, just the prepaid user realizes the method for international roaming between the GSM of two kinds of different structures mobile network, one of them mobile network (being referred to as the A net) provides prepayment service with a kind of CAMEL2 of being called as technology, its MSC/SSP can discern the calling that this calling is a pre-payment, and these callings can be reported SCP and control and handle, to realize real time billing; Interface between MSC/SSP and the SCP is based on the application protocol CAP2 of the CAMEL2 of signalling system No.7.Another mobile network (being referred to as the B net) be use different with A net, be called as the Non-CAMEL technology prepayment service be provided, mobile switch (MSC/SSP) model in this B net is numerous, the equipment disunity, intelligent network protocol that it is supported or version are different with the A net, for example can be CS1, CAMEL1 or CAMEL2, even if support CAMEL2, also may be different CAMEL2 version and having any different.MSC in the B network that has does not even support any intelligent network protocol, only supports ISUP.The MSC/SSP of B net can't directly interconnect with the SCP of A net like this, unless modification MSC/SSP or SCP, and this change to network is bigger, invests also greatly, and the cycle of enforcement is long.
The present invention is provided with a roaming broker device to solve the problems referred to above in Non-CAMEL network (B net).This roaming broker device is analog service exchange point SSP and service control point (SCP) individually or simultaneously, SCP gateway and/or MSC/SSP gateway as the CAMEL2 network of supporting the various protocols conversion, guarantee interconnecting between the Non-CAMEL network equipment and the CAMEL2 network equipment, thereby support the two-way pre-payment services of roaming between these two different isomerization networks.
Roaming broker device of the present invention is arranged on Non-CAMEL area side, and main consideration is the complexity that can adapt to the Non-CAMEL area side network equipment and interface neatly.Because mobile switch (MSC/SSP) model of Non-CAMEL country is numerous, the equipment disunity, intelligent network protocol that it is supported or the version also agreement with the CAMEL2 network are different, or even do not support any intelligent network protocol, as only supporting ISUP, problem often takes place when carrying out device intercommunicating like this.With the unified gateway of roaming broker device, make its implementation and later maintenance all more flexibly, conveniently now as CAMEL2 area SCP.For example Non-CAMEL area needs to increase new MSC agreement triggering mode, as long as roaming broker is increased the corresponding protocol ability and realizes with the conversion of CAP2, need not change and maintenance work for the operator in CAMEL2 area.Moreover, because CAMEL2 area MSC/SSP adopts unified CAP2 agreement, in case after test is finished, with regard to basic fixed.And Non-CAMEL area roaming broker device possibly with the service node/accounting server intercommunication of many operators, so the roaming broker device to be placed on the Non-CAMEL side proper.When new service node/accounting server increased, its debugging and interoperability test also can be more convenient.For example: the voice suggestion that prepayment service needs should be provided by the MSC/SSP of accesses network, but voice ID is by the SCP appointment in CAMEL2 area, need be mapped to local voice ID to different operators.If the roaming broker device is positioned over the CAMEL2 side, in the Non-CAMEL side whenever there being new operator to add, or operator's decision change voice, the roaming broker device that is located at the CAMEL2 side all can be affected, maintenance difficulties increases greatly.Now, the roaming broker device is arranged on Non-CAMEL area side, the MSC/SSP that the voice suggestion that prepayment service needs is just roamed the place network by the user controls its built-in voice ID and plays voice, rather than is provided by its former end ID, can save the international line resource like this.
Referring to Fig. 2, how brief description the present invention supports the implementation method of two-way pre-payment services of roaming:
When (1) prepaid user of B network roaming enters the A network, roaming broker device of the present invention is as the gateway of A network side MSC/SSP, simulation SCP function, adopt the CAP/SS7 interface protocol MSC/SSP direct and the A net of A net interconnected, this roaming broker device or be connected by the prepayment service platform in internal interface and the B net, perhaps directly handle the service logic of prepayment service, finish the control and the real time billing of calling.Its voice and signaling transmission line are represented with chain-dotted line in Fig. 2.
When (2) prepaid user of A network roaming enters the B network, roaming broker device of the present invention is as the SCP gateway of A net, be connected with the MSC of B net and the SCP of A net respectively, realize the possible variety of protocol of B net, comprise of the conversion of the version of CS1, CAMEL1 and CAMEL2 to A net CAMEL2 version; If the MSC of B net does not support any intelligent network protocol, this roaming broker device can also adopt the ISUP interface to communicate by letter with the MSC of B net, converts ISDN User Part to CAMEL2 that A nets, realizes real-time calling control and charging.Its voice and signaling transmission line dot in Fig. 2.
No matter be the B net to prepaid user's roaming of A net, still the A net is roamed to the prepaid user that B nets, and roaming broker device of the present invention all is arranged on B net side.If realize bi-directional roaming simultaneously, then this roaming broker device should possess the ability of SSP gateway and SCP gateway simultaneously.
Specifically describe the B network users respectively below in conjunction with accompanying drawing and roam into the implementation method that A network and A network users roam into roaming broker under two kinds of situations of B net.
(1) B net prepaid user roams into the A net:
Calling when B net prepaid user roams into the A network has two kinds: the MO that a kind of prepaid user of being initiates as caller calls out, and another kind is that the prepaid user calls out as the called MT that answers.
When the prepaid user when called, its MT call flows is the same with its processing method at home network (B net), need not be through the processing of roaming broker device, its call proceeding and real time billing realize voluntarily by the MSC of B net and service node or accounting server, repeat no more here.
When roaming to the A network for the B network users, roaming broker device of the present invention in network the position and networking structure as shown in Figure 2.At this moment, from the A network side, roaming broker device of the present invention is equivalent to SCP, provides A the CAP2/SS7 interface of net to the MSC of A net, has shielded the network condition of B net simultaneously.Like this, the MSC/SSP of A net directly carries out with the roaming broker device that is arranged on the B net with CAP/SS7 alternately.In addition, the present invention also requires the CSI CAMEL-Subscription-Information ability of the HLR support CAMEL2 of B net, and the SCP address in pre-payment international roaming user's the CSI information is appointed as roaming broker.
Like this, when B network users roaming enters the A net and makes a call, the MSC/SSP of A net will call out to trigger according to user's O-CSI CAMEL-Subscription-Information and report to the roaming broker device, this roaming broker device adopts multiple mode to inquire about advanced charge user data in the prepayment service node/accounting server of B net, account balance and call rate according to this user determines whether continue or refuse calling and real time billing simultaneously.
Referring to Fig. 3, introduce B net prepaid user and roam into the MO call flows of A net when doing caller:
(1) prepaid user's roaming of B net enters the A net, carries out the position and upgrades;
(2) the Visited Location Registor VLR/ moving exchanging center MSC/service switching point of A net and the B net attaching position register HLR under this user carry out the position renewal alternately;
(3) HLR returns user profile to VLR/MSC/SSP, comprises the CAMEL subscription information O-CSI data of making a start, and VLR/MSC/SSP inserts user profile;
(4) this user makes a call as caller at the A net;
(5) VLR/MSC/SSP triggers intelligent call according to O-CSI, and to the SCP of O-CSI appointment gateway, promptly the roaming broker device sends and calls out control request;
(6) this roaming broker device uses the API of appointment to report the prepayment service node/accounting server of B net, and real time billing is carried out in request;
(7) service node/accounting server is accepted or the refusal calling according to the situation indication of user account remaining sum;
(8) if call authorization is successful, then the VLR/MSC/SSP of roaming broker indication A net does further and continues;
(9) VLR/MSC/SSP continues to called number accordingly according to the connection indication of roaming broker device.
According to the concrete condition of the service node/accounting server in the B net, roaming broker device of the present invention can select one of following three kinds of modes and B network service node/accounting server to communicate alternately:
(A) immediate data storehouse access way: referring to Fig. 4, when adopting this mode, the roaming broker device when inquiry prepaid user's data, the direct database D B of access service node/accounting server, any external interface that does not need service node/accounting server to provide.The advantage of this mode is: can save the investment of roaming broker database, not need service node/accounting server is done any change.
(B) database synchronization mode: referring to Fig. 5, the roaming broker device carries database, the database of this database and service node/accounting server keeps synchronously, and the roaming broker device just can obtain prepaid user's data as long as inquire about the database of oneself like this, thereby finishes the control to calling out.The advantage of this mode is: do not need service node/accounting server is done big change.
(C) Kai Fang api interface mode: referring to Fig. 6, when adopting this mode, the opening API that the roaming broker device provides by service node/accounting server realizes the data access to the prepaid user, thereby finishes the control to calling out.The advantage of this mode is: adopt open interface to communicate by letter with service node/accounting server, whole system has higher fail safe and flexibility.But need do certain change to service node/accounting server, require it to the roaming broker open interface.
(2) A net prepaid user roaming enters the B network:
Calling when A net prepaid user roams into the B network has two kinds: the MO that a kind of prepaid user of being initiates as caller calls out, and another kind is that the prepaid user calls out as the called MT that answers.
When the prepaid user when called, its handling process is the same with its processing method in home network (A net), need not be through the processing of roaming broker device, its call proceeding and real time billing are realized voluntarily by the MSC of A net and the SCP of prepayment service.Here repeat no more.
When roaming to the B network for A net prepaid user, roaming broker device of the present invention in network the position and networking structure as shown in Figure 7.The roaming broker device still is arranged in the B network, the responsible trigger request that receives B net MSC to the MO calling of initiation in the B net of A network users, this call request can report by different interface protocols, for example ISUP or CS1 INAP or CAMEL1 or CAMEL2, roaming broker device of the present invention will be forwarded to corresponding SCP in the A net from the call request of B net as the SCP gateway of A net.This roaming broker device should be able to be supported the conversion of various protocols between B, A network or version, and for example INAP CS1 is to the conversion of CAP2, and CAP1 is to the conversion of CAP2, and different editions CAP2 is to the conversion of A net CAP2.When the MSC of B net does not support any intelligent network protocol, also can directly will call out route and deliver to the roaming broker device and handle by ISDN User Part.In this case, this roaming broker device is also supported the conversion of ISUP to CAP2.
It is to adopt the number segment triggering mode that calling when A net prepaid user roams into the B net triggers; If the MSC/VLR of B net supports MAP2
+CSI CAMEL-Subscription-Information ability the time, also can trigger MO and call out by its O-CSI CAMEL-Subscription-Information that obtains from the HLR of A net.
When A net prepaid user roams into the B net when sending MO and calling out, MSC will call out to trigger according to number segment or O-CSI CAMEL-Subscription-Information and be reported to the roaming broker device, the roaming broker device adopts the CAP2/SS7 interface protocol of A net to be reported to A to net corresponding SCP calling to handle then, SCP inquiry prepaid user's account information is also controlled the roaming broker device and is finished calling, the roaming broker device is according to the instruction of SCP, adopt the MSC of B net corresponding protocol (INAP CS1 or CAP1 or CAP2 or ISUP) control B net to continue, and finish whole calling.
Referring to Fig. 8, introduce A net prepaid user and roam into the MO call flows of B net when doing caller:
(1) A net prepaid user does caller at the B net and makes a call;
(2) MSC of B net reports call request according to number segment or O-CSI CAMEL-Subscription-Information to the roaming broker device;
(3) the roaming broker device adopts CAP2 calling to be reported to the user attaching SCP of A net;
(4) SCP inquires about this user account information according to call request, and judges whether to accept or the refusal calling;
(5) if call out to accept, then the MSC of roaming broker device indication B net with call proceeding to the called subscriber;
(6) MSC with call proceeding to the called subscriber.
In a word, the present invention adopts roaming broker device solves mobile pre-paying user's international roaming problem, be the actual conditions of having taken all factors into consideration current network, it is the technology difference that different GSM networks is realized prepayment service, for example the CAMEL2 standard is adopted in the unification of the GSM of China's Mainland net, the GSM net in Hong Kong then adopts based on the intelligent network of the CAMEL2 of CS1 or different editions or based on the service node of ISUP, thereby the roaming broker device is placed on the Non-CAMEL network side, this roaming broker device provides unified CAP2 interface as gateway to CAMEL2 side network, shielded the situation of the network of Non-CAMEL side, the signaling of being responsible between the equipment with two networks is changed; And flexibility is strong, is fit to the complexity and the diversity of Non-CAMEL network side, can support two-way international pre-payment roaming simultaneously, and test and maintenance work are relatively simple, add the required international traffic resource of clawback technology thereby saved original USSD greatly; Also need not do big change and upgrading to the both sides network, invest little, fast implementation.Therefore, the present invention has good popularization and application prospect.
Claims (9)
1, the implementation method of the international roaming of a kind of prepaid user between two kinds of heterogeneous networks, it is the prepaid user realizes international roaming between the GSM mobile network of two kinds of different pre-payment implementation methods method, one of them mobile network provides prepayment service with a kind of CAMEL2 of being called as technology, its MSC has the SSF ability, adopt application protocol CAP2 between MSC/SSP and SCP, be referred to as the A net based on the CAMEL2 of signalling system No.7; Another mobile network adopt with A net different, be called as the Non-CAMEL technology prepayment service be provided, the technology of its use is based on the intelligent network CS1 of intelligent network capability set 1, or be called as the intelligent network of the customization service logic that the GSM mobile network of CAMEL1 strengthens based on another kind, or based on the intelligent network of the CAMEL2 of A net different editions, or the ISDN User Part of the non intelligent net of employing service node mode, be referred to as the B net; It is characterized in that: a roaming broker device is set in the Non-CAMEL network, this roaming broker device analog service exchange point SSP and service control point (SCP), SCP gateway with CAMEL2 ability and/or MSC/SSP gateway as the A net of supporting the various protocols conversion, guarantee interconnecting between the Non-CAMEL network equipment and the CAMEL2 network equipment, thereby support the two-way pre-payment services of roaming between these two different isomerization networks.
2, method according to claim 1, it is characterized in that: described protocol conversion is to be called as the intelligent network CAMEL1 of the customization service logic that the GSM mobile network of CAMEL1 strengthens or to be the agreement CAP2 of A net CAMEL2 version based on the protocol conversion with the intelligent network CAMEL2 version of the CAMEL2 of A net different editions based on the ISDN User Part mode of non intelligent net or based on the intelligent network CS1 of intelligent network capability set or based on another kind in the B net, thereby realizes adopting the agreement of different editions to communicate between the SCP of different mobile operator and the MSC/SSP; Described roaming broker device possesses the function of SSP gateway and SCP gateway simultaneously, can realize bi-directional roaming.
3, method according to claim 1, it is characterized in that: when prepaid user's roaming of B network enters the A network, described roaming broker device is as the MSC/SSP gateway of A network side simulation SCP function, adopt the CAP2/SS7 interface protocol MSC/SSP direct and the A net of A net interconnected, this roaming broker device is connected by the interior prepayment service platform of internal interface and B net, perhaps directly handle the service logic of prepayment service, finish the control and the real time billing of calling; At this moment, the attaching position register HLR of B net supports the CSI CAMEL-Subscription-Information ability of CAMEL2, and the SCP address in pre-payment international roaming user's the CSI information is appointed as the roaming broker device.
4, method according to claim 3 is characterized in that: the calling when prepaid user's roaming of described B network enters the A network is divided into two kinds: the MO that this prepaid user initiates as caller calls out and this prepaid user calls out as the called MT that answers; When this prepaid user when called, its MT call flows is the same with its processing method at the B network of ownership, need not be through the processing of roaming broker device, its call proceeding and real time billing are all realized voluntarily by the MSC of B net and service node or accounting server; And when this B net prepaid user roaming enters A net initiation MO calling, the MSC/SSP of A net will call out to trigger according to user's O-CSI CAMEL-Subscription-Information and report to the roaming broker device, by the advanced charge user data in the prepayment service node/accounting server of this roaming broker device inquiry B net, account balance and call rate according to this user determine whether continue or refuse this calling, and real time billing.
5, method according to claim 4 is characterized in that: described B net prepaid user roaming enters the MO call flows of initiating as caller behind the A network and comprises the following steps:
(1) prepaid user's roaming of B net enters the A net, carries out the position and upgrades;
(2) the B net attaching position register HLR under the Visited Location Registor VLR of A net and/or moving exchanging center MSC and/or service switching point and this user carries out the position renewal alternately;
(3) B net location register HLR returns this user profile to A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point, comprises making a start CAMEL subscription information O-CSI data and insert this user profile in A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point;
(4) this user makes a call as caller at the A net;
(5) intelligent call is triggered according to O-CSI in A net Visited Location Registor VLR and/or moving exchanging center MSC and/or service switching point, and to the SCP of O-CSI appointment gateway, promptly the roaming broker device sends and calls out control request;
(6) this roaming broker device uses the API of appointment to report the prepayment service node/accounting server of B net, and real time billing is carried out in request;
(7) service node/accounting server of B net is accepted or the refusal calling according to the situation indication of user account remaining sum;
(8) if call authorization is successful, then the Visited Location Registor VLR of roaming broker device indication A net and/or moving exchanging center MSC and/or service switching point are done further and are continued.
(9) the corresponding operation that continues is carried out to called number, to finish calling according to the connection indication of roaming broker device in the Visited Location Registor VLR of A net and/or moving exchanging center MSC and/or service switching point.
6, method according to claim 5, it is characterized in that: this roaming broker device uses the API of appointment to report the prepayment service node/accounting server of B net in the described step (6), when real time billing was carried out in request, available three kinds of modes and service node/accounting server carried out alternately:
(A) immediate data storehouse access way: when inquiry advanced charge user data, directly the database of access service node/accounting server does not need service node/accounting server that any external interface is provided;
(B) database synchronization mode: this roaming broker device is provided with database, and the database of this database and service node/accounting server keeps synchronously, the roaming broker device be as long as oneself database of inquiry just can obtain prepaid user's data like this, thus the continuing of controlling call;
(C) Kai Fang api interface: the opening API that roaming broker provides by service node/accounting server realizes the data access to the prepaid user, thereby finishes the control to calling out.
7, method according to claim 1, it is characterized in that: when prepaid user's roaming of A network enters the B network, described roaming broker device is connected with the MSC of B net and the SCP of A net respectively as the SCP gateway, realize the conversion of various communication protocols in the B net and be responsible for receiving the trigger request that MO that B net MSC initiates in the B net the A network users calls out, and will be forwarded in the A net SCP accordingly from the call request of B net; This call request reports by CS1 INAP or CAMEL1 or with the CAMEL2 interface protocol of A net different editions; If when the MSC of B net did not support any intelligent network protocol, this roaming broker device then adopted the ISUP interface to communicate by letter with the MSC that B nets; The roaming broker device is netted the CAMEL2 agreement CAP2 that call request that MSC sends converts the A net to B, realizes real-time calling control and charging.
8, method according to claim 7 is characterized in that: the calling when prepaid user's roaming of described A network enters the B network is divided into two kinds: the MO that this prepaid user initiates as caller calls out and this prepaid user calls out as the called MT that answers; When this prepaid user when called, its MT call flows is the same with its processing method in home network A net, need not be through the processing of roaming broker device, its call proceeding and real time billing are by the MSC of A net and provide the SCP of prepayment service to realize voluntarily; And when this A net prepaid user roaming enters B net initiation MO calling, B net MSC is reported to the roaming broker device that is provided with in the B network according to the trigger request of travelling carriage integrated services digital network MSISDN or international mobile station identity IMSI number segment or O-CSI CAMEL-Subscription-Information are initiated this A network users in the B net MO calling, this roaming broker device adopts the CAP2/SS7 interface protocol of A net to be reported to A to net corresponding SCP this calling to handle then, whether SCP inquires about this prepaid user's account information and controls the roaming broker device and continue or refuse this calling, and real time billing; This roaming broker adopts the INAP CS1 of B net or the MSC of CAP1 or CAP2 or ISDN User Part control B net to continue, and finishes whole calling according to the instruction of SCP.
9, method according to claim 7 is characterized in that: described A net prepaid user roaming enters the MO call flows of initiating as caller behind the B network and comprises the following steps:
(1) A net prepaid user makes a call as caller at the B net;
(2) MSC of B net reports call request according to number segment or O-CSI CAMEL-Subscription-Information to the roaming broker device;
(3) the roaming broker device adopts CAP2 calling to be reported to the user attaching service control point (SCP) of A net;
(4) this user account information is inquired about according to call request in this service control point (SCP), and judges whether to accept or the refusal calling;
(5) if call out to accept, then the MSC of roaming broker device indication B net with call proceeding to the called subscriber.
(6) MSC to the called subscriber, finishes call proceeding with call proceeding.
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| CN 200410000583 CN1262145C (en) | 2004-01-14 | 2004-01-14 | Method for implementing international roaming of prepaid subscriber between two isomeric networks |
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| CN 200410000583 CN1262145C (en) | 2004-01-14 | 2004-01-14 | Method for implementing international roaming of prepaid subscriber between two isomeric networks |
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| CN1262145C CN1262145C (en) | 2006-06-28 |
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