CN101106611A

CN101106611A - Voip inter-network switching system based on H323 protocol

Info

Publication number: CN101106611A
Application number: CNA2007101195473A
Authority: CN
Inventors: 杜玲
Original assignee: Beijing Jiaxun Feihong Electrical Co Ltd
Current assignee: Beijing Jiaxun Feihong Electrical Co Ltd
Priority date: 2007-07-26
Filing date: 2007-07-26
Publication date: 2008-01-16

Abstract

The invention discloses a Voip internetwork exchange system based on H323 protocol in IP communication field. The system server operation includes two simultaneous processes: one process corresponds to public network and the other process corresponds to private network. The internally defined private protocol information is sent between two processes. When receiving Q931 information and H 245 information of H 323, one process will analyze the information and sent to opposite end process by internally defined private protocol information. The opposite end process constructs new H323 standard information and sends to corresponding network. The source address is filled with the IP address of SoftGW opposite process. The invention can realize only one public network IP address occupied, realize the intercommunication between a plurality of Voips of the private and the public networks and effectively reduce the occupation of public network IP address.

Description

Based on switching system between the Voip net of H323 agreement

Technical field

The present invention relates to the IP communications field, the form with gateway on network exists, and based on the H323 agreement, can realize the Voip voice gateways or the IP phone intercommunication of public network and private network by this equipment.

Technical background

SoftGW: be exactly designate of the present invention, it carries out the conversion of H323 call signaling address across between public network and the private network, realizes Gateway or IP Phone intercommunication between public network and the private network.

Gateway: promptly voice gateways are important component parts of network access device, and it not only has the function of route, and can change between two different protocol suites, thus make carry out between the different networks interconnected.

Gatekeeper: promptly the gatekeeper is a kind of Softswitch, is responsible for signal exchange and control on the VoIP networking, and its function class is the important component part of Voip network system like the switch on the traditional PSTN.Mainly contain the RAS function, i.e. authentification of user, address resolution, Bandwidth Management, routing management, security management, district management etc.

IP Phone: be VoIP (Voice over Internet protocol) phone again, be meant the communication equipment that is applied to realize on the IP network speech and facsimile signal transmission.

The application of current Voip equipment more and more widely realizes on the public network intercommunication between every Gateway or the IP Phone, needs each Gateway or IP Phone that the IP address of a public network is all arranged, and can take increasing IP address resource like this;

SoftGW only takies a public network IP address across between public network and the private network, just can realize many Gateway of private network or the intercommunication between IP Phone and public network Gateway or the IP Phone, has effectively reduced taking of public network IP address.

Summary of the invention:

The invention provides a kind of based on switching system between the Voip net of H323 agreement, it need be registered on normal voice gateways, and only take a public network IP address, just can realize many Gateway or IP Phone and public network Gateway or IP Phone intercommunication.

Switching system may operate on any one server that (SuSE) Linux OS is arranged between this Voip net, and during running software, system server needs two network interface cards; One is set as public network IP address, and one is set as private network IP address.

Constitute by two processes based on switching method between the Voip net of H323 agreement; When moving, two processes need be moved simultaneously, the corresponding public network of process, the corresponding private network of process sends the inner proprietary protocol message that defines between two processes.Send to the opposite end process by inside story after need be when a process is received the Q931 message of H323 and H245 message with message parse, sent on the corresponding network by the new H323 standard message of opposite end process structure, source address is filled out the IP address of the opposite end process of SoftGW again.Receive speech message, just source address converts the IP address of opposite end process to, directly is dealt on the network of opposite end process.

The SoftGW private network process of corresponding private network need be registered in a common Gateway mode on the gatekeeper of private network; The SoftGW public network process of corresponding public network need be registered in a common Gateway mode on the gatekeeper of public network.

When the Gateway of public network or IP Phone call out all private network Gateway or IP Phone, the Gateway of public network or IP Phone only seen called out a gateway by the registration of SoftGW public network process, SoftGW public network process has only taken a public network IP address.

When the Gateway of the Gateway of private network or IP Phone calling public network or IP Phone, by the breathe out public network process of SoftGW of SoftGW private network process, breathe out by the public network process of SoftGW again, concerning the Gateway or IP Phone of public network, see just that also a gateway call of being registered by SoftGW public network process is to it.

If there is not SoftGW, each Gateway of private network or IP Phone need take a public network address.The disposal ability of SoftGW is decided by the performance of the server of its operation.The server performance of SoftGW operation is high more just can be with the Gateway or the IP Phone of more private networks.

In the Voip system, SoftGW exists in the mode of Gateway, because the message that SoftGW externally sends and receives is the H323 message of standard, miscellaneous equipment does not need to do special processing, its compatibility is fine, can with any Gateway, Gatekeeper, the IP Phone networking of standard H323.

Can learn that by such scheme the present invention has reduced the use of IP public network address on the large program very much, and simple possible.

Description of drawings:

Fig. 1 is a SoftGW grid topology

Fig. 2 is for exchanging flow chart between the Voip net based on the H323 agreement

Embodiment:

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.

Fig. 1 is the network topological diagram of SoftGW system of living in, SoftGW has two network interface cards, one is set as public network address, one is set as private net address, the process of SoftGW can be registered on the gatekeeper of public network, also can with gateway or the IP phone intercommunication on the public network, another process can be registered on the gatekeeper of private network, also can with gateway or the IP phone intercommunication on the private network.

Fig. 2 is the process that private network Gateway or IP Phone call out public network Gateway, is the operation principle of example explanation SoftGW with 82220000 users among the Gateway4 of the 82260000 calling public networks of user among the Gateway1 of private network:

(1) private network Gateway1 calling subscriber 82260000 calls out called subscriber 82220000 (as shown in Figure 1), look into called number 82220000 by ARQ message, because SoftGW private network process herd number on private network Gatekeeper has 8222, be SoftGW private network IP address so find called address;

(2) private network Gatekeeper returns ACF to private network Gateway1, and notice private network Gateway1 called address is SoftGW private network IP address;

(3) private network Gateway1 sends Setup message to SoftGW private network process;

(4) SoftGW private network process receives that Setup does message parse;

(5) critical field sends proprietary protocol Setup message to SoftGW public network process among the SoftGW private network process taking-up Setup;

(6) SoftGW public network process is taken out called number 82220000 key messages such as grade, and the ARQ message of structure standard is looked into called party information to the Gatekeeper of public network;

(7) because the Gateway4 of public network has registered office direction 8222 in public network Gatekeeper, so obtain the IP address that called IP address is public network Gateway4; Public network Gatekeeper returns ACF and gives SoftGW public network process, notifies the called Gateway4 of being;

(8) SoftGW public network process structure standard Setup message (source IP address is filled out the SoftGW public network address) is dealt on the public network Gateway4;

(9) public network Gateway4 receives Setup, handles the back and returns CallProceeding to SoftGW public network process;

(10) SoftGW public network process is received CallProceeding message, resolves message;

(11) SoftGW public network process structure private message CallProceeding sends to SoftGW private network process;

(12) after SoftGW private network process was received, structure standard C allProceeding message (source IP address is filled out SoftGW private network IP address) sent on the private network Gateway1;

(13) after public network Gateway4 user 82220000 rings, return Alerting to SoftGW public network process;

(14) SoftGW public network process is received Alerting message, resolves message;

(15) SoftGW public network process structure private message Alerting sends to SoftGW private network process;

(16) after SoftGW private network process was received private message Alerting, structure standard A lerting message (source IP address is filled out SoftGW private network IP address) sent on the private network Gateway1;

(17) behind public network Gateway4 user 82220000 off-hooks, return Connect message to SoftGW public network process;

(18) SoftGW public network process is received Connect message, resolves message;

(19) SoftGW public network process structure private message Connect sends to SoftGW private network process;

(20) after SoftGW private network process was received private message Connect, structure standard C onnect message (source IP address is filled out SoftGW private network IP address) sent on the private network Gateway1;

(21) private network Gateway1 sends Voice message to SoftGW private network process;

(22) SoftGW converts private net address in the Voice message to the public network address of SoftGW;

(23) Voice after will changing sends on the Gateway4 of public network;

(24) public network Gateway4 sends the public network process of Voice to SoftGW;

(25) SoftGW receives that Voice converts source IP address to SoftGW private network IP address;

(26) Voice after SoftGW will change sends on the Gateway1 of private network;

(27) when calling subscriber's 82260000 on-hooks, private network Gateway1 sends DRQ message to private network Gatekeeper;

(28) private network Gatekeeper sends DCF message to private network Gateway1;

(29) private network Gateway1 sends the Release call release to SoftGW private network process;

(30) SoftGW private network process is received Release message, resolves message;

(31) SoftGW private network process structure private message Release sends to SoftGW public network process;

(32) after SoftGW public network process was received private message Release, the Release message (source IP address is filled out the SoftGW public network address) of structure standard sent to public network Gateway4.

Claims

1. switching system between the Voip based on the H323 agreement nets, it is characterized in that: system server is in service to comprise two processes of operation simultaneously, the corresponding public network of process, the corresponding private network of another process sends the inner proprietary protocol message that defines between two processes; Proprietary protocol message by the inside definition after need be with message parse when a process is received the Q931 message of H323 and H245 message sends to the opposite end process, sent on the corresponding network by the new H323 standard message of opposite end process structure, source address is filled out the IP address of the opposite end process of SoftGW again.

2. switching system between a kind of Voip based on the H323 agreement according to claim 1 nets, it is characterized in that: system server needs two network interface cards, and one is set as public network IP address, and one is set as private network IP address; System be may operate on any one server that (SuSE) Linux OS is arranged.

3. according to claim 1 a kind of based on switching system between the Voip net of H323 agreement, it is characterized in that: the private network process of corresponding private network need be registered in a common Gateway mode on the gatekeeper of private network; The public network process of corresponding public network need be registered in a common Gateway mode on the gatekeeper of public network.