CN100466754C - Implementing method for joining VPN service for user of user switch - Google Patents

Implementing method for joining VPN service for user of user switch Download PDF

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Publication number
CN100466754C
CN100466754C CNB03145173XA CN03145173A CN100466754C CN 100466754 C CN100466754 C CN 100466754C CN B03145173X A CNB03145173X A CN B03145173XA CN 03145173 A CN03145173 A CN 03145173A CN 100466754 C CN100466754 C CN 100466754C
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China
Prior art keywords
subscriber
exchange
calling
user
specific format
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Expired - Fee Related
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CNB03145173XA
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Chinese (zh)
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CN1568021A (en
Inventor
蔡永峰
丁建军
徐海峰
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Shanghai Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB03145173XA priority Critical patent/CN100466754C/en
Publication of CN1568021A publication Critical patent/CN1568021A/en
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Abstract

The invention discloses an implement method of the affair that users of the private exchanger join in the virtual private network, and the method makes the private exchanger connect to the fixed network operator and the synthetic operator at the same time. When user makes a telephone call, the call joints through the network of the fixed telephone operator, and if the user of the private exchanger calls the user of the virtual private network, the private exchanger switches over the network of the synthetic operator.

Description

The user of subscriber exchange adds the implementation method of centrex service
Technical field
The present invention relates to the centrex service technology, (Private BranchExchange, user PBX) adds the implementation method of centrex service to particularly a kind of subscriber exchange.
Background technology
There are some telecom operators temporarily can't give fixed telephone subscriber's assign telephone numbers at present, perhaps these users' fixed telephone number has distributed number by other fixed network telecom operators, also the PBX extension user is not joined in Virtual Private Network (the being called for short VPN) group of GSM and CDMA net.For these users, essential during calling will be by fixed network operator's network, so the city telephone rate of these callings is also collected by the fixed network operator.
Summary of the invention
The object of the present invention is to provide a kind of user of subscriber exchange to add the implementation method of centrex service, will be directly when the PBX extension user is made a call in VPN group network by this operator.
Realize technical scheme of the present invention:
A kind of user of subscriber exchange adds the implementation method of centrex service, it is characterized in that comprising when the user of subscriber exchange does caller step:
(1), the user of subscriber exchange makes a call to the centrex service group user;
(2), subscriber exchange is with the IP front end processor of call proceeding in the network that centrex service is provided;
(3), the IP front end processor is converted to the user's of subscriber exchange calling number the number of specific format in this network and calling is transferred to gateway switch;
(4), gateway switch is triggered to service control point with calling, service control point draws the centrex service group at user place and returns to gateway switch from the calling number of described specific format;
(5), gateway switch is received the called subscriber according to the centrex service group and the described short codes at user place with calling;
A kind of user of subscriber exchange adds the implementation method of centrex service, it is characterized in that user when subscriber exchange makes to comprise when called step:
A, calling subscriber adopt the centrex service short codes to make a call to the user of subscriber exchange;
B, local mobile switching centre are triggered to service control point with calling, and service control point will obtain called subscriber's specific format number and return to local mobile switching centre according to described short codes;
C, local mobile switching centre are transferred to corresponding IP front end processor according to the specific format number with calling, and this IP front end processor arrives subscriber exchange according to the corresponding information in the specific format number with call proceeding, carries out final call proceeding by this subscriber exchange.
Adopt the present invention can help temporarily not have the operator of fixed number resource, the user under the pbx switch directly is linked into the network of oneself, a part is fixing calls out thereby shunt, and the scope that branches out increases runs income.Especially utilize vpn service, user under the pbx switch directly can be connected in the network of these operators in the mode that adds VPN group, to directly pass through the network of this operator when these PBX users make a call like this in VPN group, need not be transferred to the network of oneself by fixed network operator's network, the city telephone rate of this part calling just can directly be collected by this operator.
Description of drawings
Fig. 1 is an access principle schematic of the present invention;
The principle schematic of Fig. 2 for continuing by mobile tandem exchange;
The principle schematic of Fig. 3 for continuing by fixed network tandem exchange.
Embodiment
Realization of the present invention defines the number of a specific format need for each subscriber exchange (being called for short PBX) user again, the true number of this number for only using for Network Recognition, by disposing corresponding route data, this true number can be realized PBX extension user's call proceeding.
Consult shown in Figure 1ly, subscriber exchange PBX is connected to fixed network operator's network and comprehensive carrier network simultaneously, and the comprehensive operator here is exactly an operator that the user under the pbx switch will be joined in the own vpn service.The user is when dialing ordinary call, the network of calling out still by the fixed-line telecom carrier continues, if but (for example the user dials: vpn service access code+called short codes) pbx switch just can be transferred to calling in the network of comprehensive operator when PBX user dials the VPN group user.
Comprehensive operator generally provides the IP phone call service for PBX user by the IP front end processor.The present invention utilizes the IP front end processor PBX user to be linked into the network of comprehensive operator, when the needs trigger intelligent business, by the IP front end processor calling is transferred to the service switching point again, by the service switching point calling is triggered to the service control point (SCP) and carries out the IN service processing.Subscriber exchange can judge that the access code of the vpn service that the user dials is transferred to the IP front end processor with calling and handles during specific implementation.
Be linked into the VPN(Virtual Private Network) business that generally also will trigger intelligent network behind the network of comprehensive operator in calling.And for guarantee these call out can be correct in the network of comprehensive operator continue, and processing that can be correct to the number of PBX in SCP adopts a principle to renumber to the calling number of these PBX; On switch, carry out simultaneously the configuration of route data according to the principle of these numberings, can be with the calling that guarantees PBX in online correct the continuing of comprehensive operator.
The numbering principle of subscriber exchange specific format number:
Guarantee continuing and the correct processing of service control point (SCP) of calling in order to handle to calling out, need in the switching network of operator, the original calling party number ' s convert to PBX be the specific format number, number after the conversion has two effects, first, when PBX does caller, dial user in the net with cornet, in service control point, must draw user's group earlier according to calling number, numbering in the net could be translated as true number, but the calling number that PBX sends might repeat with the number of sending of other PBX, so establish a cryptoprinciple, so that each PBX is differentiated.The second, other users dial PBX with cornet, cornet need be translated as this specific format number, and switches at different levels can be delivered to route on the PBX (or extension set of PBX) according to this number.
Cryptoprinciple is: subscriber exchange sign prefix (1)+0+ not with the PBX calling number (4-8 position) of area code (2-3 position)+MSC route (PBX numbering, 1-3 position)+originally of zero as 9 0755 P1 P2 P3ABCD.PBX calling number originally is meant to be exactly the inside short codes that original subscriber exchange distributes for each extension set, is not the long code of subscriber exchange.
The sign prefix is for the virtual main call number of PBX and actual fixed telephone number are distinguished, and area code and MSC route are to do route data in order to continue on switch.This number just is used for route and authentication in inside, is sightless to the user.Owing to need transmit this number, require this number length can not be above 15 by the Telephone User Part in the Signaling System Number 7.
According to this cryptoprinciple, the calling party number ' s convert that PBX is reported is the calling number of this specific format by the IP front end processor.
In being routed to the process of PBX, do route data for convenience, PBX can be identified prefix and be transformed to the PBX prefix (1-4 position) that continues, number length is many, distinguishes easily with other number.As a PBX caller is 9-0755-001-1234, continue according to 6010-755-001-1234 when being routed to this PBX, switch according to 601 routings by.
Below do the VPN caller with PBX respectively and called the present invention is described in detail:
PBX does the realization of VPN caller:
When PBX did the VPN caller, subscriber exchange had the unified two kinds of networking modes that insert and insert nearby:
The unified access: the PBX of each local network handles between all PBX and relevant calling by the unified some gateway switch (being called for short GMSC/SSP) (or SSP of overlay network) that insert of IP front end processor by this GMSC/SSP.
Insert nearby: the PBX of each local network inserts local GMSC/SSP (or SSP of OVERLAY) nearby by the IP front end processor, and this mode can be saved toll trunk, and routing infrastructure is also more clear, but need do more route data; Particularly, when perhaps each local network all has GMSC/SSP (or SSP of overlay network), should adopt this kind mode in the target network mode.Concrete enforcement can be adopted the mode of above-mentioned dual mode combination, adopts nearby at the local network that satisfies the requirements and the user is more and inserts, and other local network adopts unified the access.
Consult shown in Figure 1ly, the handling process that the user of subscriber exchange does caller is as follows:
The user of step 1, subscriber exchange makes a call to the VPN group user; Subscriber exchange is with the IP front end processor of call proceeding in the network that centrex service is provided;
Step 2, IP front end processor are converted to the user's of subscriber exchange calling number the number of specific format in this network and calling are transferred to gateway switch;
Step 3, gateway switch trigger intelligent business are carried out the processing of IN service to the service control point (SCP).Service control point draws the centrex service group at user place from the calling number of described specific format, and obtains called true number according to called short codes, indication gateway switch replay call;
Step 4, gateway switch arrive call proceeding called according to called true number.
PBX does the called realization of VPN:
Join comprehensive operator's network PBX user after, be at the MSC/SSP that triggers calling procedure to the translation of PBX number, and the PBX user's that will be routed to number is not the existing number of existing network, the switch of existing network is not supported the specific format number in other words.Therefore existing route data can't be finished PBX and do called handshaking procedure, must be beforehand with new route data to solve local route and toll route.
At identical local network, then just can route the call to the IP front end processor for the cellphone subscriber who makes a call and PBX user as long as do the continue route data of number format of PBX at GMSC/SSP, and then by the IP front end processor with call proceeding to pbx switch.
Not at identical local network, just need in existing switch, seek the office that can bear the toll tandem office function for the PBX user of caller VPN customer call and caller, calling be delivered to the local network at called PBX user place.
Consult shown in Figure 2ly, when calling and called are striden local network, realize call proceeding by doing route data at mobile network's self mobile junction center (being called for short TMSC).MSC/SSP delivers to TMSC with calling, by TMSC the GMSC at PBX place is delivered in calling again, is routed to PBX by GMSC by the IP front end processor, and such routing mode can make full use of prior network device, and implementation step is as follows:
Step 1: the calling that mobile phone is initiated is arrived SCP by local mobile switching centre's trigger intelligent business, the called PBX user's who the mobile subscriber is dialed at the business function of SCP by intelligent network VPN short codes, be translated as the called number (be SCP number directly find the specific format number) of the specific format that can continue according to the number format of PBX, and then will call out and be transferred to MSC/SSP again and continue by cornet and VPN group.
Step 2: local moving exchanging center MSC/SSP judgement called number is that the number of local network still is the number of strange land net, if be the local network number, then local mobile switching centre is transferred to gateway exchange GMSC/SSP with calling, gateway exchange determines that according to the specific format number this calledly is the user of subscriber exchange, carry out step (6), otherwise carry out step (3);
Step 3: local mobile switching centre is transferred to mobile junction center TMSC/SSP with calling and handles;
Step 4: mobile junction center TMSC/SSP is transferred to the on-site mobile gateway GMSC/SSP of office of called subscriber's switch according to continue prefix and area code information of the subscriber exchange in the called number with calling.
Step 5: the GMSC/SSP of mobile gateway office forwards calling to the IP front end processor and continues according to the prefix that continues of the subscriber exchange in the called number.
Step 6:IP front end processor arrives certain specific subscriber exchange according to the relaying information in the called number with call proceeding, is finally continued by this subscriber exchange.
Consult shown in Figure 3ly, when calling and called are striden local network, realize call proceeding to tandem exchange's route by the IP front end processor.The IP front end processor all has speech channel to existing fixed toll tandem office or long-distance SSP, the toll tandem office that can select one of them to call out as PBX, the calling that GMSC/SSP will be routed to PBX all is routed to the IP front end processor, if PBX belongs to this IP front end processor, just directly continue,, then fixedly toll tandem office is delivered in calling by the IP front end processor if do not belong to, tandem exchange routes the call to the IP front end processor at PBX place, complete connection again.Implementation step is as follows:
Step 1: the calling that mobile phone is initiated is arrived the service control point (SCP) by local mobile switching centre's trigger intelligent business, the called PBX user's that business function in the service control point (SCP) by intelligent network is dialed the mobile subscriber VPN short codes, be translated as the called number of the specific format that can continue according to the number format of PBX, and then will call out and be transferred to local moving exchanging center MSC/SSP again and continue.
Step 2: local moving exchanging center MSC/SSP judges that called number is the PBX number, therefore calling is transferred to the local mobile gateway GMSC/SSP of office and handles.
Step 3: gateway exchange judges that called number is that the PBX number then will be called out the unified local IP front end processor processing that is transferred to, because local IP front end processor has to the fixedly speech channel of tandem exchange.
Step 4: local IP front end processor according to the area code in the called number of specific format judge the called subscriber whether with the calling subscriber at same local network, if judged result for not, then local IP front end processor forwards calling to fixed network tandem exchange TS and handles; Otherwise carry out step (6);
Step 5: the TS of fixed network tandem exchange is transferred to the on-site IP front end processor of called PBX according to continue prefix and area code information of the subscriber exchange in the called number with calling.
Step 6: this IP front end processor arrives certain specific subscriber exchange according to the relaying information in the called number with call proceeding, is finally continued by this subscriber exchange.
If having done the data of above-mentioned route across the entire province, can realize that then the cellphone subscriber can call out PBX with cornet inside the province, if made route data in the whole country, then mobile phone can be at national roaming call PBX.

Claims (7)

1, a kind of user of subscriber exchange adds the implementation method of centrex service, it is characterized in that comprising when the user of subscriber exchange does caller step:
(1), the user of subscriber exchange makes a call to the centrex service group user;
(2), subscriber exchange is with the IP front end processor of call proceeding in the network that centrex service is provided;
(3), the IP front end processor is converted to the user's of subscriber exchange calling number the number of specific format in this network and calling is transferred to gateway switch, the number of described specific format is: subscriber exchange sign prefix+" 0 "+not is with the Subscriber Number of area code+MSC route+subscriber exchange of zero;
(4), gateway switch is triggered to service control point with calling, service control point draws the centrex service group at user place and returns to gateway switch from the calling number of described specific format;
(5), gateway switch is received the called subscriber according to the centrex service group and the short codes at user place with calling.
2, the method for claim 1 is characterized in that:
Subscriber exchange sign prefix is 1;
Be not the 2-3 position with zero area code;
MSC route is the 1-3 position;
The Subscriber Number of subscriber exchange is the 4-8 position.
3, the method for claim 1 is characterized in that, the subscriber exchange of local network inserts gateway exchange or/and insert local gateway exchange nearby by the IP front end processor by the IP front end processor is unified.
4, a kind of user of subscriber exchange adds the implementation method of centrex service, it is characterized in that user when subscriber exchange makes to comprise when called step:
A, calling subscriber adopt the centrex service short codes to make a call to the user of subscriber exchange;
B, local mobile switching centre are triggered to service control point with calling, service control point will obtain called subscriber's specific format number and return to local mobile switching centre according to described short codes, and the number of described specific format is: subscriber exchange sign prefix+" 0 "+not is with the Subscriber Number of zero area code+MSC route+subscriber exchange;
C, local mobile switching centre are transferred to called corresponding IP front end processor according to the specific format number with calling, this called corresponding IP front end processor arrives called corresponding subscriber exchange according to the corresponding information in the specific format number with call proceeding, carries out final call proceeding by this called corresponding subscriber exchange.
5, method as claimed in claim 4 is characterized in that, step C comprises step:
C11, local mobile switching centre according to the area code in the specific format number judge the called subscriber whether with the calling subscriber at same local network, if judged result is then carried out step C12 for being, otherwise carry out step C13;
To gateway exchange, gateway exchange determines that according to the specific format number this calledly is the user of subscriber exchange, and carries out step C15 with call proceeding for C12, local mobile switching centre;
To mobile tandem exchange, mobile tandem exchange is transferred to calling according to continue prefix and the area code signal in the specific format number mobile gateway office at called subscriber's switch place with call proceeding for C13, local mobile switching centre;
C14, described gateway exchange arrive corresponding IP front end processor according to the prefix that continues in the specific format number with call proceeding;
C15, IP front end processor arrive called corresponding subscriber exchange according to the corresponding information in the specific format number with call proceeding, carry out final call proceeding by this called corresponding switch.
6, method as claimed in claim 4 is characterized in that, step C comprises step:
C21, local mobile switching centre determine the user of this called subscriber for subscriber exchange according to the specific format number, and with call proceeding to local mobile gateway office;
C22, local mobile gateway office are transferred to local IP front end processor according to the specific format number with calling;
C23, local IP front end processor according to the area code in the specific format number judge the called subscriber whether with the calling subscriber at same local network, if judged result is then carried out step c24, otherwise carried out step c25 for not;
C24, local IP front end processor forward calling to fixedly tandem exchange, according to continue prefix and area code information in the specific format number calling are transferred to the on-site IP front end processor of called subscriber's switch by tandem exchange;
C25, described IP front end processor arrive called corresponding subscriber exchange according to the corresponding information in the specific format number with call proceeding, carry out final call proceeding by this called corresponding switch.
7, as claim 4,5 or 6 described methods, it is characterized in that:
Subscriber exchange sign prefix is 1;
Be not the 2-3 position with zero area code;
MSC route is the 1-3 position;
The Subscriber Number of subscriber exchange is the 4-8 position.
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