基于ICE方式多网络视频会议系统中SIP穿越NAT的研究与设计

Research and Design of NAT Traversal for SIP in Video Conferencing Systems Based on ICE

作为下一代会话信令控制协议,SIP被得到广泛的应用,在视频会议系统的多网络背景下,参与会话的各成员之间具有良好的互通性极为重要,基于SIP的NAT穿越则是解决这个问题的关键.从系统实际出发,针对目前各种实现方案,阐述了基于ICE的NAT穿越方案,并得到了很好的实现.

As the next-generation control （signaling） protocol Session Initiation Protocol （SIP） has been widely used, especially in video conferencing systems over multi-network, connectivity among the members in session is a big problem. The key to resolving this problem lies in methodology for Network Address Translator （NAT） traversal for the SIP. This article depending on actual conditions of system and the exist- ing solutions, expounds a methodology for NAT traversal which called ICE which has yielded desirable resuits.