基于H.248协议的IP用户媒体网关设计模型  

H.248-Based IP User Media Gateway Design Model

作　　者：李瀛[1] 李海旭[1] 王光兴[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2004年第10期927-930,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(863-701-2-4).

摘　　要：介绍了NGN和软交换的概念,根据'中国软交换设备总体技术要求',提出了基于H.248协议的IP用户媒体网关的一种设计模型,对系统进行了仿真,并说明了各个模块的功能和实现以及用户媒体网关之间语音数据处理流程·最后,分析了系统实现的难点与关键技术·应用这种设计模型,可以保护已有PSTN网的巨额投资,解决了现有各种类型用户顺利接入NGN问题,实现其原有的基本业务和各种增值业务,进而使PSTN网平滑过渡到下一代网络·Introducing briefly the concepts of NGN and softswitch, and according to 'China's General Technical Requirements for Softswitch Devices', the design model based on H.248 protocol for IP user media gateways is presented basically. An emulator was designed to emulate the system so as to explain the function and implementations of each and every module and the voice handling flow between two user media gateways. The difficulties and key technique are discussed for system implementation. Using the design model can protect the huge investments in PSTN, resolve all existing problems of how to smoothen users' accessing NGN, implement many basic services especially the value-added services and enable PSTN to transit to NGN smoothly.

关 键 词：NGN 软交换 H.248 RTP/RTCP IP用户媒体网关 MGC PEFN 

分 类 号：TN915.05[电子电信—通信与信息系统]