【作者】 熊永华； 吴敏； 贾维嘉； 张历卓；

【Author】 Xiong Yonghua1,2,Wu Min1,Jia Weijia2,Zhang Lizhuo1,2 1.School of Information Science and Engineering,Central South University,Changsha 410083,P.R.China 2.Department of Computer Science,City University of Hong Kong,Hong Kong,P.R.China

【机构】 中南大学信息科学与工程学院； 香港城市大学计算机科学系；

【摘要】 本文总结了实时通信系统的通用组网结构,针对现有的实时通信系统尚未实现PC到3G(第三代移动网络)手机视频通信的现状,创新性地利用普通3G modern卡开发了从IP核心网到香港WCDMA标准3G无线网的网关,设计了一种简化的SIP(Session Initial Protocol)协议,实现了由PC到3G手机的实时语音和视频通信系统。运行结果表明通信质量满足多媒体会话的要求。本系统在2006年12月的世界电信展上展出,受到多方关注,并被多家报纸所报导。更多还原

【Abstract】 Video communications from personal computers to 3G mobile phones have still not been implemented in the ex-isting instant message systems.This paper discusses the general network architecture for instant message systems and innova-tively presents a gateway from IP core network to WCDMA 3G mobile network in Hong Kong and devises a sort of protocols based on reduced Session Initial Protocol.Moreover,the article designs and implements a new instant message system that puts audio and video communications between personal computers and 3G mobile phones into practice.The running results testify that communications qualities meet the requirements of multimedia session.The system is exhibited at the ITU TELECOM WORLD 2006 and gets much attention,furthermore,it is be reported by many newspapers.更多还原