CN100417107C - A system and method for implementing wide area virtual network service - Google Patents
A system and method for implementing wide area virtual network service Download PDFInfo
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- CN100417107C CN100417107C CNB031396828A CN03139682A CN100417107C CN 100417107 C CN100417107 C CN 100417107C CN B031396828 A CNB031396828 A CN B031396828A CN 03139682 A CN03139682 A CN 03139682A CN 100417107 C CN100417107 C CN 100417107C
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Abstract
The present invention provides a system for implementing wide area virtual network services, which comprises a service processing module and a data base module of an exchanger system. The present invention is characterized in that a management module and a protocol module are connected between the service processing module and the database module, wherein the management module is used for processing parts relevant to services in a wide area virtual user exchanger, and the parts relevant to services comprise the interaction with the protocol module, real routing information obtainment of called users and the management of the occupation and the release of wide area virtual user exchanger resources; the protocol module is positioned on an SCCP user layer and is used for processing parts relevant to signalling and the requirements of the management module, a request is initiated by an SCCP, and the routing information of a wide area virtual user exchanger is inquired by terminal exchange. Because the system and the method of implementing wide area virtual network services of the present invention are utilized, the function of intelligent services can be satisfied without needing the modification of intermediate tandem exchange or the upgrade of an exchanger; operators' additional investment cost can be avoided.
Description
Technical field
The present invention relates to a kind of implementation method of wide area virtual net business, particularly a kind of by the system and method for the non intelligent net mode of switch with realization wide area virtual net business.
Background technology
The wide area virtual net (is called for short WAC, WideAreaCentrex) is a kind of of virtual net.It will be positioned at centrex (CENTREX) on the different switching nodes by the connection on physics and the signaling, thereby form a VPN (virtual private network) virtual, cross-region.Though this network has dispersiveness on the region, but complete class is same as the single virtual net on character or occupation mode, and application prospect will be very good in future.
There are two kinds of main flow modes to realize " wide area virtual net " at present, promptly utilize the mode and the mode of utilizing the realization wide area virtual net business of non intelligent net of the realization wide area virtual net business of intelligent network.
For the implementation of utilizing intelligent network, to assist to finish a complete WAC by SSP in the intelligent telephone network and SCP exactly and call out and route, its shortcoming is to need the additional investment cost.
And utilize the implementation of non intelligent net, and generally be to utilize the ISUP signaling that two or more switches directly or are indirectly connected, wherein all routes, exchange, number identification etc. are all finished in switch inside.Though Signaling System Number 7 application layer (TUP, ISUP etc.) signaling can be transmitted abundant signaling parameter, but because each producer inevitably has some to come in and go out to the understanding of business norms, so more or less can there be some problems on the business intercommunication between the different type of machines.For the more districts and cities of switch standard, this mode is difficult to be applied among the reality.
The system and method for the virtual wide area business of realization proposed by the invention, then be different from the Wide Area Centrex business that occurs in the market, owing to adopted the Signaling System Number 7 agreement of standard to realize wide area virtual net business, office and terminal station two ends are supported as long as make a start, therefore the modification of tandem exchange in the middle of need not does not exist the problem that interconnects.
Summary of the invention
Purpose of the present invention is just at the defective that exists in the above-mentioned background technology, a kind of system and method for realizing wide area virtual net business is provided, realize wide area virtual net business by the switch mode, only need two end office (EO)s of calling out are provided with and handle, group's information of broad sense virtual net can be utilized the landing office that is delivered to of Signaling System Number 7 agreement, thereby in network-wide basis, realize wide area virtual net business.
In order to achieve the above object, the invention provides a kind of method that realizes wide area virtual net business, it is characterized in that may further comprise the steps:
Centrex according to innings user that makes a start calls out, the retrieval switch database;
The wide area virtual net attribute that wherein belongs to WAC group's customer call is sent to the wide area centrex administration module at Calling Side place;
The WACCtll process of wide area centrex administration module retrieves corresponding overall number in database;
The WACAP agreement is initiated corresponding SCCP query messages to terminal station;
End exchange WACtll process obtains a temporary number resource from switch database;
Innings WACtll process of making a start is according to this searching route striking out of this temporary number resource;
Innings WACtll process of making a start withdraws from, and discharges the data field.
The present invention also provides a kind of system that realizes wide area virtual net business, be positioned at the wide area centrex, comprise the Service Processing Module and the database module of switch system, it is characterized in that, be connected with administration module and protocol module between described Service Processing Module and the database module, wherein:
Described administration module is used for handling the wide area centrex part relevant with business, comprises with protocol module carrying out obtaining the true routing iinformation of called subscriber alternately, and the taking and discharge of management wide area centrex resource.
Described protocol module is positioned at the SCCP client layer, is used to handle the part relevant with signaling and the requirement of described administration module, and initiates request to SCCP, by terminal station inquiry wide area centrex routing iinformation.
The implementation method of wide area virtual net business provided by the present invention, owing to adopted the Signaling System Number 7 of standard to realize wide area virtual net business, office and terminal station two ends are supported as long as make a start, the modification of tandem exchange in the middle of need not, therefore there is not the problem that interconnects, need not switch and do upgrading, can satisfy the IN service function, can avoid appending of additional investment cost of operators.
Be elaborated below in conjunction with embodiment and with reference to the technical scheme of accompanying drawing to this invention.
Description of drawings
Fig. 1 is the johning knot composition of each switching node in the wide area virtual net of the present invention;
Fig. 2 is the functional block diagram of system of wide area centrex Centex of the present invention end office (EO);
Fig. 3 is the location diagram of wide area centrex Centrex group business protocol processes part of the present invention in No.7 signalling system;
Fig. 4 is the operational flowchart of the realization wide area virtual network call business of wide area virtual net service implementation method of the present invention;
Fig. 5 is wide area centrex Centrex of the present invention group net mode one structural representation;
Fig. 6 is wide area centrex Centrex of the present invention group net mode two structural representations;
Fig. 7 is wide area centrex Centrex of the present invention group net mode three structural representations;
Fig. 8 is wide area centrex Centrex of the present invention group net mode four structural representations;
Fig. 9 is the process chart of the WACCtll process of wide area centrex Centrex administration module of the present invention; Figure 10 is a terminal station WACCtll process of the present invention, obtains the operational flowchart of a temporary number resource TLMN from database.
Figure 11 is that the present invention's innings WACCtll process of making a start is the operational flowchart of called searching route striking out;
Figure 12 is the signaling process figure of the wide area virtual net that employing mode one is formed in the embodiment of the invention;
Figure 13 is the signaling process figure of the wide area virtual net that employing mode two is formed in the embodiment of the invention;
Figure 14 is the signaling process figure that the embodiment of the invention adopts the wide area virtual net of mode three compositions.
Embodiment
As shown in Figure 1, involved in the present invention to each switching node of wide area virtual network all comprise Wide Area Centrex make a start office 10, Wide Area Centrex terminal station 20 and administrative center 30, the office 10 that makes a start here, terminal station 20 can be distributed in different regions with administrative center 30.Wherein, make a start office 10 and terminal station 20 are the ZXJ10 switch that has the Wide Area Centrex user's data, and the real-time inquiry of two ends interoffice transmission calling signaling, and the calling that takes place is between the two inquired about in real time; Administrative center safeguards signaling to two end office's transfer tube reasons respectively, and by based on the agreement of calling out the application layer on the irrelevant SCCP (in the present invention for convenience, temporarily with this agreement called after WACAP agreement, English full name is with reference to Wide AreaCentrex Application Part), Wide Area Centrex user to each end office (EO) manages, comprise and distribute telephone numbers, the number of deleting, revise operation such as Wide Area Centrex group attribute that above-mentioned management also can realize by network management protocol.
As shown in Figure 2, the present invention will realize that the system of Wide Area Centrex business comprises Service Processing Module, (comprising caller half call proceeding 201 and called half call proceeding 202), virtual net service management module WACCtll (comprising the WACCtll process) 203, virtual net protocol module (being the WACAP agreement) 203 and database module (DB) 204, wherein Wide Area Centrex administration module WACCtll and Wide Area Centrex protocol module WACAP are that switch system increases two modules newly, are connected between Service Processing Module and the database module:
Wide Area Centrex administration module 203, be used for handling the Wide Area Centrex part relevant with business, mainly comprise with Wide Area Centrex protocol module WACAP and carry out obtaining the true routing iinformation of Wide Area Centrex called subscriber alternately, manage taking and discharging of Wide Area Centrex resource simultaneously;
Wide Area Centrex protocol module WACAP belongs to the SCCP client layer, is used to handle the part relevant with signaling, by the requirement of WACCtll module, initiates request to SCCP, and to terminal station inquiry WAC routing iinformation, the function of its original business side remains unchanged substantially.
As shown in Figure 3, be Wide Area Centrex protocol module WACAP residing location diagram in No.7 signalling system, the Wide Area Centrex protocol module is based on and calls out the application layer protocol on the irrelevant SCCP.
As shown in Figure 4, be the operational flowchart of a wide area virtual network call of the processing business of wide area virtual net service implementation method of the present invention; The step that this flow process comprised is as follows:
At first, the Centrex according to innings user that makes a start calls out retrieval switch database, step 401; The wide area virtual net attribute that wherein belongs to WAC group's customer call is sent to the wide area centrex administration module at Calling Side place, and this wide area virtual net attribute returns step 402 by CM_GETTPSUBSLC message; The WACCtll process of wide area centrex administration module retrieves corresponding overall number (GT number), step 403 in database; According to this overall situation number, the WACAP agreement is initiated corresponding message to terminal station and is connected control SCCP query messages, step 404; End exchange WACCtll process obtains a temporary number resource TLMN, step 405 from switch database; Innings WACCtll process of making a start is notified caller half call proceeding of wide area virtual net obligation system, should seek route striking out, step 406 according to this temporary number resource; Innings WACCtll process of making a start withdraws from, and discharges the data field, step 407.
Come the system and method for realization wide area virtual net business of the present invention is described further below by a concrete example.
Generally, the mode of Wide Area Centrex group business calling is divided into following four kinds of pattern networkings:
As shown in Figure 5, be the structural representation of Wide Area Centrex group business call service group net mode one, wherein make a start office 101 and terminal station are the ZXJ10 switch with WAC function;
As shown in Figure 6, structural representation for Wide Area Centrex group business call service group net mode two, office's 10 the switch of wherein making a start does not have the WAC function, but it can judge the calling subscriber is WAC user, and by calling out tandem to ZXJ10 switch 40, in its call signaling, have prefix before the called number;
As shown in Figure 7, structural representation for Wide Area Centrex group business call service group net mode three, office's 10 switches of making a start have the WAC function, called place terminal station 20 non-ZXJ10 switches, and originating call is by arriving terminal station 20 with ZXJ10 switch 40 tandems of called place terminal station 20 the same areas;
As shown in Figure 8, be the structural representation of Wide Area Centrex group business call service group net mode four, make a start office 10 and terminal station 20 are the switch with WAC function, calling will by with ZXJ10 switch 40 transit calls of calling and called exchange place the same area.
As shown in Figure 9, embodiment flow chart for the method for realization wide area virtual net business provided by the present invention, be described below carrying out the operating process that wide area virtual network call handles: at first, switch carries out number analysis, step 901 to the little number of WAC of innings calling user dials of making a start; Judge whether centrex (Centrex) is called out step 902 for it; If this number be " Centrex callings ", then receive complete called number, comprise in caller group number and called little number, the big number of caller PSTN, the caller group trumpet yard etc., and according to this called number, access switch database, step 903; Whether judgement finds corresponding local subscriber, step 904 in described switch database; If in described switch database, can't find and the corresponding local subscriber of this called little number, then further judge whether WAC group of this call group, step 905, if WAC group, then return messages CM_GETTPSUBSLC gives innings WACCtll process of place Wide Area Centrex administration module of making a start, be with wide area virtual net attribute in the message structure, step 906; After innings WACCtll process of making a start is received this message, little number in group who calls out according to this WAC number and the called group, accessing database finds corresponding overall number (GT number), step 907; According to this GT number, WACAP protocol process by the office that makes a start is initiated the SCCP query messages to terminal station, need be with following parameter in this message: caller group number, the big number of caller, the little number of caller, called little number, calling subscriber location area code, local exchange identification number, here it should be noted that, owing to be based on the SCCP of standard, middle Signalling Transfer Point just carries out signalling route according to GT number, DPC and SSN, need not any change, step 908; After the WACAP protocol process of terminal station was received this message, the WACCtll process of notice local exchange obtained a temporary number resource TLMN, step 909, (detailed process of this step is referring to Figure 10) from database; After the response that innings WACAP that makes a start receives that terminal station is sent obtains the TLMN success message, send the WACCtll process that message WACInfoAckEvent notifies local exchange, have TLMN number and called true big number (PSTN) in this message structure, step 910; Innings WACCtll process of making a start this moment is notified caller half call proceeding of wide area virtual net system, seeks the route striking out according to the TLMN that provides in the flow process of front, thereby has finished the calling procedure of a wide area virtual net, step 911; Innings WACCtll process of making a start afterwards withdraws from, and discharges the data field, step 912.
As shown in figure 10, be the detailed process of step 909,, obtain big number of called PSTN and service attribute, step 1001 according to little number, called group's Query Database in the called group; According to terminal station WACCtll process place PID and according to message reference databases such as district sign, caller group number, the big number of caller, little number, called little number, calling subscriber location area code, local exchange identification numbers, so that obtain a temporary number resource TLMN, step 1002 from database; In the database about whether idle temporary number resource, step 1003 are arranged in the record of this module; If no, then return failure, step 1004; Otherwise, fill this record according to the input parameter that primitive calls, return the TLMN number and give terminal station WACCtll process, step 1005; Receive the response to the office that makes a start by the transmission of SCCP layer, be with TLMN number and called true big number in the message, step 1006; In innings WACCtll process of making a start one timer is set, waits for that the office of making a start makes a call step 1007; The timer expiry that innings WACCtll is provided with if make a start then discharges the calling subscriber by the WACCAP notice office of making a start, and discharges resources such as TLMN simultaneously, step 1008, and execution in step 910 continues.
As shown in figure 11, be the detailed process of step 911, make a call IAM or IAI message of the office of making a start is given terminal station, and called number is the TLMN number in the message, step 1101; Terminal station caller half call proceeding is carried out number analysis to the TLMN number after receiving IAM or IAI message, to Home Exchange Call, reach The Minimum Number Length after, call primitive CM_GETTPSUBSLC, step 1102; According to the record corresponding that finds in the database with this temporary number, obtain called true big number, return WACCtll process in this record with message CM_GETTPSUBSLCACK, and in message, fill called true number greatly, and other group attribute, step 1103; The WACCtll process of storing in the Notification Record discharges the TLMN resource, step 1104; After the WACCtll process was received CM_GETTPSUBSLCACK message, notice caller half call proceeding was newly carried out number analysis according to called true large size code weight, and is searched callee, step 1105 according to the number analysis result; Execution in step 912 continues.
Below operation is finished alternately by former server call side and called trunk side, and corresponding aforesaid way one is to the networking mode of mode three, and its typical interoffice signaling is described below respectively:
As shown in figure 12, for networking mode one, office 10 and the terminal station 20 of making a start is the situation of the ZXJ10 switch with WAC function, its interoffice signaling flow process is: the office 10 that makes a start sends SCCP message to terminal station 20, (message structure comprises caller group number to be specially WACInfoReq message, the big number of caller, the little number of caller, called little number, calling subscriber location area code, the local exchange identification number), after terminal station 20 is received this message, return SCCP message to the office of making a start, (message structure comprises temporary number resource TLMN to be specially WACInfoAck message, called big number); Other signaling of representing for solid line is a Signaling System Number 7 application layer signaling.
As shown in figure 13, for networking mode two, be applied to caller WAC user not at the ZXJ10 switch, and the office that makes a start can not provide the situation of WAC function, its interoffice signaling flow process is: it is WAC user that office's 10 transmissions of making a start can be judged the calling subscriber, in its call signaling, comprise the big number of caller, have WAC prefix and called little number before the number; This call signaling tandem is to ZXJ10 switch 40, and follow-up signaling process is identical with signaling process among Figure 12, is as the ZXJ10 switch of tandem equipment and the signaling process between the terminal station 20 only here.
As shown in figure 14, for networking mode three, it is applied to called WAC user not at the ZXJ10 switch, and terminal station 20 can not provide the situation of WAC function, and the interoffice signaling flow process is:
Make a start office send SCCP message to the ZXJ10 switch 40 of called place terminal station 20 the same areas, this message is WACInfoReq message (message structure has caller group number, the big number of caller, the little number of caller, called little number, calling subscriber location area code, local exchange identification number), after ZXJ10 switch 40 is received this message, return SCCP message to the office of making a start, be specially WACInfoAck message (message structure comprises temporary number resource TLMN, called big number); Follow-up signaling process is identical with signaling process among Figure 12, is the office 10 and as the signaling process between the ZXJ10 switch 40 of called place terminal station 20 the same areas of terminal station tandem equipment of making a start only here.
Claims (3)
1. wide area virtual net service implementation method is characterized in that this method may further comprise the steps:
Centrex according to innings user that makes a start calls out, the retrieval switch database;
The wide area virtual net attribute that will belong to WAC group's customer call is sent to the wide area centrex administration module at Calling Side place;
The WACCtll process of wide area centrex administration module retrieves corresponding overall number in database;
The WACAP agreement is initiated corresponding SCCP query messages to terminal station;
Terminal station WACCtll process obtains a temporary number resource from switch database;
Innings WACCtll process of making a start is sought the route striking out according to this temporary number resource;
Innings WACCtll process of making a start withdraws from, and discharges the data field.
2. wide area virtual net service implementation method as claimed in claim 1 is characterized in that, described end exchange WACCtll process obtains the step of a temporary number resource from switch database, also comprise following flow process:
According to little number, called group's Query Database in the called group, obtain big number of called PSTN and service attribute;
According to terminal station WACCtll process place PID and data field thereof sign, caller group number, the big number of caller, little number, called little number, calling subscriber location area code, local exchange identification number message reference database, obtain a temporary number resource TLMN from database;
In the Query Database about idle temporary number resource record is arranged in the terminal station WACCtll module;
Fill this record according to the input parameter that primitive calls, return the TLMN number and give terminal station WACCtll process;
Receive the response to the office that makes a start by the transmission of SCCP layer, be with the TLMN number in the message;
In innings WACCtll process of making a start one timer is set, waits for that the office of making a start makes a call;
The timer expiry that innings WACCtll is provided with if make a start then discharges the calling subscriber by the WACCAP notice office of making a start, and discharges the TLMN resource simultaneously.
3. wide area virtual net service implementation method as claimed in claim 1 is characterized in that, described innings WACCtll process notice caller half call proceeding of making a start, and the step according to this temporary number resource searching route striking out also comprises following flow process:
Make a call IAM or the IAI message of office of making a start is given terminal station, and called number is the TLMN number in the message;
Terminal station caller half call proceeding is carried out the TLMN number analysis after receiving IAM or IAI message, to reaching the Home Exchange Call of The Minimum Number Length, calls primitive CM_GETTPSUBSLC;
According to the record corresponding that finds in the database with this temporary number resource, obtain called true big number, the WACCTL process during return messages CM_GETTPSUBSLCACK writes down to this, and in message, fill called true big number, and group's attribute;
The WACCTL process of storing in the Notification Record discharges the TLMN resource;
After the WACCtll process was received CM_GETTPSUBSLCACK message, notice caller half call proceeding was newly carried out number analysis according to called true large size code weight, and is searched the callee according to the number analysis result.
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| CNB031396828A CN100417107C (en) | 2003-06-30 | 2003-06-30 | A system and method for implementing wide area virtual network service |
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| CNB031396828A CN100417107C (en) | 2003-06-30 | 2003-06-30 | A system and method for implementing wide area virtual network service |
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| CN100417107C true CN100417107C (en) | 2008-09-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007090356A1 (en) * | 2006-02-11 | 2007-08-16 | Huawei Technologies Co., Ltd. | Method for realizing wac service, system and calling controller and application server thereof |
| CN101163280B (en) * | 2007-11-26 | 2012-01-04 | 中国联合网络通信集团有限公司 | System and method of implementing virtual network intercommunication |
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|---|---|---|---|---|
| US4899373A (en) * | 1986-11-28 | 1990-02-06 | American Telephone And Telegraph Company At&T Bell Laboratories | Method and apparatus for providing personalized telephone subscriber features at remote locations |
| US5247571A (en) * | 1992-02-28 | 1993-09-21 | Bell Atlantic Network Services, Inc. | Area wide centrex |
| CN1131492A (en) * | 1993-08-26 | 1996-09-18 | 芬兰电讯公司 | Method for accomplishing connection |
| CN1166907A (en) * | 1994-11-25 | 1997-12-03 | 艾利森电话股份有限公司 | Telecommunication network |
-
2003
- 2003-06-30 CN CNB031396828A patent/CN100417107C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899373A (en) * | 1986-11-28 | 1990-02-06 | American Telephone And Telegraph Company At&T Bell Laboratories | Method and apparatus for providing personalized telephone subscriber features at remote locations |
| US5247571A (en) * | 1992-02-28 | 1993-09-21 | Bell Atlantic Network Services, Inc. | Area wide centrex |
| CN1131492A (en) * | 1993-08-26 | 1996-09-18 | 芬兰电讯公司 | Method for accomplishing connection |
| CN1166907A (en) * | 1994-11-25 | 1997-12-03 | 艾利森电话股份有限公司 | Telecommunication network |
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