使用ICE技术穿越NAT/FW的设计和实现  

Design and Implementation of NAT / FW Traversal Using ICE

作　　者：周大钧[1] 董云峰[1] 高悟实 陈彤 ZHOU Da-jun;DONG Yun-feng;GAO Wu-shi;CHEN Tong(Laboratory and Equipment Management Department, Qilu University of Technology ( Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]齐鲁工业大学(山东省科学院)实验室与设备管理处,济南250353

出　　处：《齐鲁工业大学学报》2019年第4期69-73,共5页Journal of Qilu University of Technology

基　　金：中国石油科技创新基金(21070-5007-0207);国家自然科学基金面上项目(21771125).

摘　　要：NAT和防火墙问题是VoIP应用中的大问题,随着互联网上各种多媒体应用的大量出现,解决该问题显得日益迫切。目前使用的一些协议和方法,如STUN、TURN等,都有一定的缺陷。ICE使用STUN、TURN等UNSAF类协议,以动态、交互式的方法在会话双方间建立连通的路径,能够适应不同的网络环境。本文详细分析了ICE的原理,并给出一种在SIP UA中的实现方法。使用ICE功能,SIP UA能够适应各种NAT环境,能够动态选择媒体流传输路径,在某些情况下可降低媒体流传输时延,提高媒体播放质量。Both NAT and Firewall are the crucial problems of VOIP. In order to solve these problems,people design and implement many methods and protocols,such as STUN,TURN etc. However,each method has some limitations. ICE is a kind of method that can create connections in an interactive way. It integrates STUN,TURN and so on,and create connections between two ends in a dynamic and mutual way. In addition,it can choose the prior path designated by the user to transmit the media stream. This paper analyzes the principle of ICE and implements ICE in SIP UA. Using ICE,the SIP UA can be adaptive to any NAT environment and can choose path transmitting media stream dynamically. In some circumstances,it can decrease the delay when transmitting media stream and improve the playing out quality of the media.

关 键 词：VOIP NAT 防火墙 穿越 ICE STUN TRUN 

分 类 号：TQ031[化学工程]