对SIP NAT问题解决方案的介绍与分析

Intruduce and analysis of NAT traversal solution in SIP

SIP作为下一代网络中的会话信令控制协议被广泛的得到应用,但是SIP在IP地址匮乏的IPv4网络中遇到的一个实际问题就是如何穿越NAT。本文将从NAT分类入手,分析SIP穿越NAT的问题,介绍目前出现的多种基于SIP的NAT穿越解决方案,列举出技术特点与适用范围,以及对它们进行分析比较。

SIP as the call control and signaling protocol in NGN is used commonly.Howerver,in the IPv4 network,SIP traversing NAT is problematic.This paper will begin with type of NAT,analysing the NAT traversal problem,intruducing several prevalent solution of NAT traversal in SIP.Then we'll put out their characteristic,efficiency and applicable area.Finally,we'll compare them each other.