NGN network system and call information transmitting method

Abstract

The invention relates to a NGN network system, divided into several network telephone manage field ITAD, wherein each ITAD comprises at least one position server LS and at least one soft exchanger SX; the LS in the same one ITAD field are linked to realize the synchronization of route information inside the field; one field can have one or LS to be linked with the LS of other fields; the SX of ITAD is connected to the LS to obtain the route information from LS; one SX of the same ITAD is connected to all other SX of the same ITAD, while said SX is called as superior SX; the superior SX of different ITAD are connected as the gateway between different ITAD. The invention also provides a relative transmission method of two kinds of calling information. The invention can realize the route election of call in the NGN network and the integrated management of route information.

Description

technical field [0001] The invention relates to the field of NGN network technology, in particular to an NGN network system and a call information transmission method. Background technique [0002] The application scale of the telephone network based on NGN (Next Generation Network) framework is constantly expanding. Operators have already started migrating to NGN-based solutions. In NGN network, IP network and PSTN network (public switched telephone network) will exist at the same time. The PSTN network and the IP network are connected through a gateway (GW, GateWay) to complete the conversion and delivery of signaling and media streams. In a call, there may be multiple suitable and competing gateways for selection. In order to realize the selection of gateways, RFC 2871 and RFC 3219 propose a location server method. [0003] In RFC 2871 and RFC 3219, it is proposed that the functions of the location server (LS) include: completing the call to the traditional circuit swi...

AI Technical Summary

Problems solved by technology

It can be seen that this method is to determine the next node one by one node by node, and draws lessons from the traditional method of the switching office in the public telephone switching network. If there is no better networking form and routing selection mechanism, it may lead to lengthy route, rather than the optimal route, causing delays in call signaling

[0006] Moreover, this method still requires recording and maintaining routing information on each softswitch device. However, the development and flexibility of IP networks make routing information update very fast. When updating routing information on a softswitch device, it is necessary to update the connected The routing information of the peer softswitch device is also updated, which is troublesome to maintain

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