摘要
要让使用私有IP地址的用户通过SIP协议进行会话,就必须使SIP的信令流和媒体流穿越NAT,而其中的难点是媒体流的穿越。目前针对这个问题国内外提出了很多方法,有些已经形成了标准,但是这些方法都存在着一些缺陷,像最常用的STUN协议就无法穿越同步NAT。文章在研究了这些方法的基础上提出了一种新的解决方案,其基本思想是把目前的一些方法综合起来使用使之能够避免单独使用所带来的缺陷,并详细叙述了具体的实现过程。
Only when the control and media flow traverse NAT,can people use private IP address to make sessions with SIP protocol. The traversing of media flow is more difficult. Now many solutions have been put forward,but they all have limitations. For example the STUN protocol can not traverse symmetric NAT. Based on these methods,this paper describes a new method and its implementation in detail. This solution makes use of these methods,but it uses them in a special way which avoids many of the pitfalls of using any of them alone.
出处
《计算机应用》
CSCD
北大核心
2004年第4期83-85,共3页
journal of Computer Applications
