基于P2P的SIP用户定位研究  

Research of the SIP User Location Based on P2P

作　　者：邓勇[1] 屈玉贵[1] 赵保华[1] 刘桂英[1] 

机构地区：[1]中国科学技术大学信息科学技术学院,安徽合肥230027

出　　处：《小型微型计算机系统》2007年第10期1755-1759,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金重大研究计划项目(90104010)资助;国家自然科学基金项目(60241004)资助;国家"九七三"计划项目(2003CB314801)资助;中国科学院计算机科学重点实验室基础研究课题基金项目资助.

摘　　要：针对利用P2P算法实现SIP用户定位的时延比较大的问题,提出了一种降低SIP用户定位时间的方法.利用底层网络的拓扑结构将P2P网络分层,SIP用户同时在自己所在的低层逻辑网络和整个P2P覆盖网上进行注册;查找用户时,在每一层上应用Chord算法并辅以常用被叫用户表.为了实现简单,所有P2P和SIP操作都由SIP消息完成.模拟表明,该方法能极大的减小查找用户的时间,进而大大缩短平均的会话建立时间.The P2P based approach for SIP user location greatly increases the tiroe of locating user. Against this issue, this paper proposes a method to reduce that time. A hierarchy structure of P2P is introduced using lower network topology. The SIP user registers itself to the higher （the overlay） and the lower ring at the same time when registration. And when locating the SIP user, the chord algorithm is applied to the every layer of the P2P. At the same time, the callee table is been used. To implement this simply, all the P2P and SIP operation is completed by the SIP message. The simulation result shows that this method can greatly reduce the time of finding user, and greatly reduce the average establish session time.

关 键 词：SIP P2P CHORD 

分 类 号：TN915[电子电信—通信与信息系统]