CN1147105C - Network intercommunication implementing server - Google Patents
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- CN1147105C CN1147105C CNB011038675A CN01103867A CN1147105C CN 1147105 C CN1147105 C CN 1147105C CN B011038675 A CNB011038675 A CN B011038675A CN 01103867 A CN01103867 A CN 01103867A CN 1147105 C CN1147105 C CN 1147105C
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Abstract
The present invention discloses a server for network intercommunication. The present invention comprises a BCSM state machine, a positioning server, a call control module, a service exchange functional module, an INAP information conversion module, a PINT protocol stack, a PINT communication module, a TCAP communication module, an INAP protocol stack, a PINT terminal interface and a signaling gateway interface. The present invention can be simultaneously connected with an IP network and a PSTN network, can receive service requests from a PINT terminal and the PSTN network, can process PINT information and INAP information, has the conversion capability on the PINT information and the INAP information, and realizes the intercommunication between the service of the two networks.
Description
Technical field
The present invention relates to be applied to the server of telecommunications network and Internet.
Background technology
Development along with computer network and communication network, IP (IP) network and PSTN (public switched telephone network) network user are on the increase, advantage for performance heterogeneous networks data processing, promote information interchange, promote making full use of of Internet resources, the business intercommunication between this two macroreticular is more and more necessary.Yet on IP network, utilizable is SIP (SIP) net, on the PSTN network, utilizable is intelligent network, still, this two macroreticular all seals at present, that is to say do not have ready-made equipment or method can realize the intercommunication of above-mentioned two macroreticulars.
Summary of the invention
The purpose of this invention is to provide a kind of server of realizing network interworking, this server can be realized the intercommunication in IP network and the PSTN Network.
For achieving the above object, the technical solution used in the present invention is: a kind of server of realizing network interworking, and it comprises BCSM (Basic Call State Model BCSM) state machine, location-server, Call Control Block, Service Switching Function module, INAP (intelligent network application protocol) message conversion module, PINT (telecommunications network and internet intercommunication) protocol stack, PINT communication module, TCAP (transaction-capable applying portion) communication module, Intelligent Network Application Protocol stack, PINT terminal interface and SGW interface; Wherein, Call Control Block links to each other with BCSM state machine, location-server and PINT communication module signal respectively; The PINT communication module divides level signal to link to each other with the PINT protocol stack and by the PINT terminal interface with the PINT terminal; The Service Switching Function module links to each other with BCSM state machine, INAP message conversion module and TCAP communication module signal respectively; The TCAP communication module links to each other with the SGW signal with the Intelligent Network Application Protocol stack and by the SGW interface;
By above-mentioned connection, when a calling when the PINT terminal is initiated, the PINT communication module receives a PINT business request information, through the PINT bag is resolved, give Call Control Block with this message and handle, Call Control Block at first sends response message by the PINT communication module to the PINT terminal by the analysis to user identity and service request, and this business added into BCSM state machine, latency services function of exchange module is handled.The Service Switching Function module is by the scanning to the BCSM state machine, if found IN service, by the INAP message conversion module, business is converted to INAP message, again INAP message is handed to the INAP communication module, through the Intelligent Network Application Protocol stack, with the INAP message conversion is TCAP message, send to SGW, simultaneously, can receive replying of SGW;
When a business is initiated by the PSTN terminal, SGW can send TCAP message to the TCAP communication module, the TCAP communication module is by calling the Intelligent Network Application Protocol stack, with the TCAP message conversion of receiving is INAP message, transfer to the Service Switching Function resume module, the Service Switching Function module writes service request in the BCSM state machine by analysis and processing to message, and the Waiting for Call control module is handled it; Call Control Block obtains this business by the scanning to the BCSM state machine, by the PINT communication module service request is converted to the PINT request message again, sends to the PINT terminal of appointment.
By such scheme as can be seen, because the server of realization network interworking of the present invention comprises the BCSM state machine, Call Control Block, the Service Switching Function module, the INAP message conversion module, the PINT protocol stack, the PINT communication module, the TCAP communication module, the Intelligent Network Application Protocol stack, PINT terminal interface and SGW interface, therefore can be connected with the PSTN net with IP network simultaneously, reception is from the service request of PINT terminal and PSTN network, PINT and INAP message are handled, and transfer capability with PINT message and INAP message, both can the individual processing IP network or the business of PSTN net, can realize service intercommunication between two networks again.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the embodiment of the invention;
Fig. 2 is the logical construction schematic diagram of the embodiment of the invention;
Fig. 3 is the PINT communication module message sink process flow diagram of the embodiment of the invention;
Fig. 4 is the PINT communication module message transmitting process flow chart of the embodiment of the invention;
Fig. 5 is the Call Control Block message processing procedure flow chart of the embodiment of the invention;
Fig. 6 is the professional scanning process flow chart of the Call Control Block of the embodiment of the invention;
Fig. 7 is the Service Switching Function module I NAP Message Processing flow chart of the embodiment of the invention;
Fig. 8 is the Service Switching Function modular service scanning flow chart of the embodiment of the invention;
Fig. 9 is the TCAP communication module message sink process flow diagram of the embodiment of the invention;
Figure 10 is the TCAP communication module message transmitting process flow chart of the embodiment of the invention;
Figure 11 is the PINT protocol hierarchy structure chart of the PINT protocol stack of the embodiment of the invention;
Figure 12 is the Intelligent Network Application Protocol hierarchical chart of the Intelligent Network Application Protocol stack of the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Logical construction of the present invention is with reference to figure 2.Logically, the PINT server is by acting server (Proxy Server), and three functional modules of location (Location) server and Service Control Gateway (SCGF) are formed, and these three modules are finished the function of PINT server jointly.Wherein acting server (Proxy Server) is a most important part, it also is the main part of PINT server, it is responsible for receiving the PINT service request from PINT terminal and PSTN network, call out control, safeguard and maintenance service condition model, and will send the PINT terminal to, or the service request of PINT terminal is delivered the PSTN network go to carry out from the business information of PSTN.In the PINT system, the Location server is used for PINT terminal and user are carried out authentication and authentication, and when acting on behalf of server and need carry out authentication or scope check to user or terminal, its can be transferred to the Location server with task and finish; SCGF is a Service Control Gateway, its main effect is the conversion that realizes PINT message and INAP message, mainly be that the expressed business of PINT message is understood and recognized, with corresponding INAP message this business description come out again, be about to the INAP message that a PINT message conversion be a correspondence.PINT protocol stack and Intelligent Network Application Protocol stack module are two supporting modules, and they support for give information encoding and decoding and the communication service of above module.
According to above-mentioned logical construction the present invention is constructed, thus the modular structure of the present invention that forms, with reference to figure 1.The server 1 of the described realization network interworking of Fig. 1 comprises BCSM state machine 2, location-server 3, Call Control Block 4, Service Switching Function module 5, INAP message conversion module 6, PINT protocol stack 7, PINT communication module 8, TCAP communication module 9, Intelligent Network Application Protocol stack 10, PINT terminal interface 11 and SGW interface 12; Wherein, Call Control Block 4 links to each other with BCSM state machine 2, location-server 3 and PINT communication module 8 signals respectively; PINT communication module 8 links to each other with PINT protocol stack 7 and by 13 fens level signals of PINT terminal interface 11 and PINT terminal; Service Switching Function module 5 links to each other with BCSM state machine 2, INAP message conversion module 6 and TCAP communication module 9 signals respectively; TCAP communication module 9 links to each other with SGW 14 signals with Intelligent Network Application Protocol stack 10 and by SGW interface 12.
By above-mentioned connection, when a calling when PINT terminal 13 is initiated, PINT communication module 8 receives a PINT business request information, through the PINT bag is resolved, give Call Control Block 4 with this message and handle, Call Control Block at first sends response message by PINT communication module 8 to PINT terminal 13 by the analysis to user identity and service request, and this business added into BCSM state machine 2, latency services function of exchange module 5 is handled.Service Switching Function module 5 is by the scanning to the BCSM state machine, if found IN service, by INAP message conversion module 6, business is converted to INAP message, again INAP message is handed to INAP communication module 9, through Intelligent Network Application Protocol stack 10, with the INAP message conversion is TCAP message, send to SGW 12, simultaneously, can receive replying of SGW 12;
When a business is initiated by the PSTN terminal, SGW 14 can send TCAP message to TCAP communication module 9, TCAP communication module 9 is by calling Intelligent Network Application Protocol stack 10, with the TCAP message conversion of receiving is INAP message, transferring to Service Switching Function module 5 handles, Service Switching Function module 5 writes service request in the BCSM state machine 2 by analysis and processing to message, and Waiting for Call control module 4 is handled it; Call Control Block 4 obtains this business by the scanning to BCSM state machine 2, by PINT communication module 8 service request is converted to PINT request message message again, sends to the PINT terminal 13 of appointment.
PINT message sink process comprises following content: at first the PINT terminal interface is scanned, if do not receive message then this terminal interface of scan round; If the message of receiving, whether legal, if illegal if calling the message that PINT protocol stack identification received, abandon this message, and continue scanning PINT terminal interface, otherwise obtain this message, give Call Control Block and handle, continue then the PINT terminal interface is scanned.With reference to figure 3.
The PINT message transmitting process comprises following content: whether at first scan the buffering area of BCSM state machine, searching has message to send, if do not have, then continues the above-mentioned buffering area of scanning; If there is message to send, call the PINT protocol stack message is encoded, send the message behind this coding then; After message sent, if receive replying of PINT terminal, expression sent successfully, then continues scanning buffer; If do not receive replying of PINT terminal, then send counting, do not surpass predetermined number of times if send, continue to send this message, otherwise abandon the transmission of this message, continue the buffering area of scanning BCSM state machine, be ready for sending down bar message.With reference to figure 4.
Above described Call Control Block 4 draw together message processing procedure and professional scanning process, be respectively applied for and handle receive from the PINT message of PINT terminal and be used to scan the BCSM state machine, handle service request from the PSTN end.Wherein:
Message processing procedure comprises following content: receive the message from the PINT terminal, judge whether this terminal and user be legal, if illegal, abandon the message that receives, continue to receive the message from the PINT terminal; Otherwise call the PINT communication module, reply to PINT terminal and user's transmission; Handle accordingly according to the class of business of the message that receives then.For example: if receive business request information, then the described business of this message is added among the BCSM, if receive service inquiry message, then in BCSM, search this business, and change this professional state and parameter information, if professional termination messages, then this business information of deletion from BCSM.With reference to figure 5.
Professional scanning process comprises following content: at first scan the buffering area of BCSM state machine, search the request that whether has from PSTN, if do not have, then continue the above-mentioned buffering area of scanning; If have, carry out respective handling according to the content of request, that is,,, then generate the PINT response message if business is replied if service request generates the PINT business request information; Call the PINT communication module then and send message,, then change service condition, continue the buffering area of scanning BCSM state machine then if receive replying that the PINT terminal returns to the PINT terminal; If do not receive replying that the PINT terminal returns, and do not surpass the number of times of appointment, then continue to send message,, continue the buffering area of scanning BCSM state machine if exceed the number of times of appointment then abandon the transmission of message to the PINT terminal.With reference to figure 6.
Above described Service Switching Function module 5 comprise INAP message processing procedure and professional scanning process, be respectively applied for and handle receive from the INAP message of PSTN end and be used to scan the BCSM state machine, handle service request from the PINT end.Wherein:
The INAP message processing procedure comprises following content: receive the INAP message from the PSTN end, call the TCAP communication module, reply to PSTN end and user's transmission; Handle accordingly according to the class of business of the message that receives then.If receive business request information, then the described business of this message is added among the BCSM, if receive professional response message, then in BCSM, search this business, and change this professional state and parameter information, if professional termination messages, then this business information of deletion from BCSM.With reference to figure 7.
Professional scanning process comprises following content: at first scan the buffering area of BCSM state machine, search the request that whether has from the PINT terminal, if do not have, then continue the above-mentioned buffering area of scanning; If have, carry out respective handling according to the content of request, that is,,, then generate the INAP response message, if service inquiry generates INAP service inquiry request message if business is replied if service request generates the INAP business request information; Call the TCAP communication module then and send message,, then change service condition, continue the buffering area of scanning BCSM state machine then if receive replying that the PINT terminal returns to the PINT terminal; If do not receive replying that the PINT terminal returns, and do not surpass the number of times of appointment, then continue to send message,, continue the buffering area of scanning BCSM state machine if exceed the number of times of appointment then abandon the transmission of message to the PINT terminal.With reference to figure 8.
Above described TCAP communication module 9 comprise TCAP message sink process and TCAP message transmitting process, be respectively applied for reception from the TCAP message of PSTN terminal be used to send the INAP message of PINT server to the PSTN end.Wherein:
TCAP message sink process comprises following content: at first the SGW interface is scanned, if do not receive message then this interface of scan round; If the message of receiving, calling the Intelligent Network Application Protocol stack decodes to the message of being received, judge then whether decoded message is legal, if it is illegal, abandon this message, and continue scanning PINT terminal interface, otherwise obtain this message, give the business function Switching Module and handle, continue then the SGW interface is scanned.With reference to figure 9.
The TCAP message transmitting process comprises following content: whether at first scan the buffering area of BCSM state machine, searching has message to send, if do not have, then continues the above-mentioned buffering area of scanning; If there is message to send, call the Intelligent Network Application Protocol stack message is encoded, send the message behind this coding then; After message sent, if receive replying of PSTN end, expression sent successfully, then continues scanning buffer; If do not receive replying of PSTN end, then send counting, do not surpass predetermined number of times if send, continue to send this message, otherwise abandon the transmission of this message, continue the buffering area of scanning BCSM state machine, be ready for sending down bar message.With reference to Figure 10.
In specific implementation of the present invention, the BCSM state machine is a big buffering area, be used for storing ongoing business state information, when professional an initiation, just create some parameters and state information that a record comes record traffic, when service condition changes, just revise professional parameter and state information, when business stops, just delete this record.The variation of record data is controlled by Call Control Block and Service Switching Function module fully.
The affairs demand that protocol stack of the present invention satisfies under the following sight in concrete enforcement produces: the server of IP main frame in IP network initiated a request, and server is transmitted to telephone network with request, carries out requested call business by telephone network.In order to express enough information required in the telephone network session, for example call or send fax, the PINT agreement is with the work that combines of Session Initiation Protocol and SDP agreement.SIP is used for setting up the contact between the participant of calling, and SDP is used for medium (media) information that exchanges in the descriptive session.The PINT agreement and is expanded and is strengthened with these two kinds of combination of protocols together.When a PINT user will excite professional in the telephone network, use SIP to invite the PINTServer of (INVITE) far-end to add session, the SDP that wherein comprises the desired media information of user describes.In the implementation of PINT business, medium are by telephone network transmission, are to transmit by IP network and do not resemble the SIP business.
The hierarchical structure of PINT agreement of the present invention is with reference to Figure 11.
The realization of Intelligent Network Application Protocol stack is with reference to Figure 12.Intelligent Network Application Protocol is the used a kind of high-level communications protocol of pass-along message between each functional entity of intelligent network, and it has defined the Applied layer interface agreement between each functional entity, and operation and each functional entity receive the operating process that must observe after the INAP message.The INAP standard that original International Telecommunication Association formulates is to define on the basis of Signaling System Number 7 net, and the Intelligent Network Application Protocol stack of realizing now is to realize on the basis of IP network.That is to say that transmission control layer replaces with UDP by SCCP.IP-based Intelligent Network Application Protocol is the communication protocol between PINT acting server and the SGW.
Claims (5)
1, a kind of server of realizing network interworking is characterized in that: it comprises Basic Call State Model BCSM BCSM state machine (2), location-server (3), Call Control Block (4), Service Switching Function module (5), intelligent network application protocol INAP message conversion module (6), telecommunications network and internet intercommunication PINT protocol stack (7), PINT communication module (8), transaction-capable applying portion TCAP communication module (9), Intelligent Network Application Protocol stack (10), PINT terminal interface (11) and SGW interface (12); Wherein, Call Control Block (4) links to each other with BCSM state machine (2), location-server (3) and PINT communication module (8) signal respectively; PINT communication module (8) divides level signal to link to each other with PINT protocol stack (7) and by PINT terminal interface (11) and PINT terminal (13); Service Switching Function module (5) links to each other with BCSM state machine (2), INAP message conversion module (6) and TCAP communication module (9) signal respectively; TCAP communication module (9) links to each other with SGW (14) signal with Intelligent Network Application Protocol stack (10) and by SGW interface (12);
By above-mentioned connection, when a calling when PINT terminal (13) is initiated, PINT communication module (8) receives a PINT business request information, through the PINT bag is resolved, giving Call Control Block (4) with this message handles, Call Control Block is by the analysis to user identity and service request, at first send response message to PINT terminal (13) by PINT communication module (8), and this business added into BCSM state machine (2), latency services function of exchange module (5) is handled.Service Switching Function module (5) is by the scanning to the BCSM state machine, if found IN service, by INAP message conversion module (6), business is converted to INAP message, again INAP message is handed to INAP communication module (9), through Intelligent Network Application Protocol stack (10), with the INAP message conversion is TCAP message, send to SGW (12), simultaneously, can receive replying of SGW (12);
When a business is initiated by the PSTN terminal, SGW (14) can send TCAP message to TCAP communication module (9), TCAP communication module (9) is by calling Intelligent Network Application Protocol stack (10), with the TCAP message conversion of receiving is INAP message, transferring to Service Switching Function module (5) handles, Service Switching Function module (5) writes service request in the BCSM state machine (2) by analysis and processing to message, and Waiting for Call control module (4) is handled it; Call Control Block (4) obtains this business by the scanning to BCSM state machine (2), by PINT communication module (8) service request is converted to the PINT request message again, sends to the PINT terminal (13) of appointment.
2, the server of realization network interworking according to claim 1 is characterized in that: described PINT communication module (8) comprises PINT message sink process and PINT message transmitting process, wherein:
PINT message sink process comprises following content: at first the PINT terminal interface is scanned, if do not receive message then this terminal interface of scan round; If the message of receiving, whether legal, if illegal if calling the message that PINT protocol stack identification received, abandon this message, and continue scanning PINT terminal interface, otherwise obtain this message, give Call Control Block and handle, continue then the PINT terminal interface is scanned;
The PINT message transmitting process comprises following content: whether at first scan the buffering area of BCSM state machine, searching has message to send, if do not have, then continues the above-mentioned buffering area of scanning; If there is message to send, call the PINT protocol stack message is encoded, send the message behind this coding then; After message sent, if receive replying of PINT terminal, expression sent successfully, then continues scanning buffer; If do not receive replying of PINT terminal, then send counting, do not surpass predetermined number of times if send, continue to send this message, otherwise abandon the transmission of this message, continue the buffering area of scanning BCSM state machine, be ready for sending down bar message.
3, the server of realization network interworking according to claim 1 is characterized in that: described Call Control Block (4) comprises message processing procedure and professional scanning process, wherein:
Message processing procedure comprises following content: receive the message from the PINT terminal, judge whether this terminal and user be legal, if illegal, abandon the message that receives, continue to receive the message from the PINT terminal; Otherwise call the PINT communication module, reply to PINT terminal and user's transmission; Handle accordingly according to the class of business of the message that receives then;
Professional scanning process comprises following content: at first scan the buffering area of BCSM state machine, search the request that whether has from PSTN, if do not have, then continue the above-mentioned buffering area of scanning; If have, carry out respective handling according to the content of request, that is,,, then generate the PINT response message if business is replied if service request generates the PINT business request information; Call the PINT communication module then and send message,, then change service condition, continue the buffering area of scanning BCSM state machine then if receive replying that the PINT terminal returns to the PINT terminal; If do not receive replying that the PINT terminal returns, and do not surpass the number of times of appointment, then continue to send message,, continue the buffering area of scanning BCSM state machine if exceed the number of times of appointment then abandon the transmission of message to the PINT terminal.
4, the server of realization network interworking according to claim 1 is characterized in that: described Service Switching Function module (5) comprises INAP message processing procedure and professional scanning process, wherein:
The INAP message processing procedure comprises following content: receive the INAP message from the PSTN end, call the TCAP communication module, reply to PSTN terminal and user's transmission; Handle accordingly according to the class of business of the message that receives then;
Professional scanning process comprises following content: at first scan the buffering area of BCSM state machine, search the request that whether has from the PINT terminal, if do not have, then continue the above-mentioned buffering area of scanning; If have, carry out respective handling according to the content of request, that is,, if business is replied, then generate the INAP response message, if service inquiry then generates INAP service inquiry request message if service request generates the INAP business request information; Call the TCAP communication module then and send message,, then change service condition, continue the buffering area of scanning BCSM state machine then if receive replying that the PINT terminal returns to the PINT terminal; If do not receive replying that the PINT terminal returns, and do not surpass the number of times of appointment, then continue to send message,, continue the buffering area of scanning BCSM state machine if exceed the number of times of appointment then abandon the transmission of message to the PINT terminal.
5, the server of realization network interworking according to claim 1 is characterized in that: described TCAP communication module (9) comprises TCAP message sink process and TCAP message transmitting process, wherein:
TCAP message sink process comprises following content: at first the SGW interface is scanned, if do not receive message then this interface of scan round; If the message of receiving, calling the Intelligent Network Application Protocol stack decodes to the message of being received, judge then whether decoded message is legal, if it is illegal, abandon this message, and continue scanning PINT terminal interface, otherwise obtain this message, give the business function Switching Module and handle, continue then the SGW interface is scanned;
The TCAP message transmitting process comprises following content: whether at first scan the buffering area of BCSM state machine, searching has message to send, if do not have, then continues the above-mentioned buffering area of scanning; If there is message to send, call the Intelligent Network Application Protocol stack message is encoded, send the message behind this coding then; After message sent, if receive replying of PSTN end, expression sent successfully, then continues scanning buffer; If do not receive replying of PSTN end, then send counting, do not surpass predetermined number of times if send, continue to send this message, otherwise abandon the transmission of this message, continue the buffering area of scanning BCSM state machine, be ready for sending down bar message.
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| CNB011038675A CN1147105C (en) | 2001-03-16 | 2001-03-16 | Network intercommunication implementing server |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005067395A2 (en) * | 2003-08-14 | 2005-07-28 | Vaman Technologies (R & D) Limited | Universal connection gateway for functionally different servers |
| DE10345548A1 (en) * | 2003-09-30 | 2005-05-04 | Siemens Ag | Arrangement and method for controlling communication links |
| WO2006116934A1 (en) * | 2005-04-30 | 2006-11-09 | Huawei Technologies Co., Ltd. | A message intercommunication gateway and a method for message transmission in the ip based message service |
| CN101330426B (en) * | 2007-10-15 | 2011-05-25 | 中兴通讯股份有限公司 | IPTV network interconnection architecture and interconnection method |
| CN101257540B (en) * | 2007-11-09 | 2010-06-02 | 清华大学 | Voice gateway for connecting IPv6 network telephone and PSTN |
| CN101321140B (en) * | 2008-07-11 | 2011-07-20 | 东南大学 | Digital relay gateway and its implementing method |
| CN103379234B (en) * | 2012-04-28 | 2017-11-10 | 深圳市共进电子股份有限公司 | The communication means and system of network voice terminal |
| DK3737045T3 (en) | 2015-05-19 | 2022-08-29 | Ericsson Telefon Ab L M | Methods and devices for reporting Message Disposition in a communication network |
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