基于SigComp的会话初始化协议压缩算法  

SIP compression algorithm based on SigComp

作　　者：李秉智[1] 杨富良[1] 

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《计算机应用》2010年第4期881-883,共3页journal of Computer Applications

摘　　要：独立媒体服务(IMS)是第三代合作伙伴计划(3GPP)在版本5中提出的支持IP多媒体业务的子系统,而基于文本的SIP消息过大成为其在IMS无线环境应用下的瓶颈,因此采用会话初始化协议(SIP)来建立和维护多媒体会话。在SigComp框架下,将改进后的LZSS算法与算术编码相结合对SIP信令进行压缩。实验表明新的算法有较高的压缩率,对改善IMS的SIP会话建立延时有一定的参考价值。Independent Media Services（IMS）is a subsystem to support IP Multimedia services,working in the 3rd Generation Partnership Project（3GPP）of version 5.IMS uses Session Initiation Protocol（SIP）to establish and maintain multi-media session;however,oversized SIP message based on text is becoming a bottleneck under IMS wireless circumstances.Under the framework of SigComp,a new algorithm based on improved Lempel-Ziv-Storer-Szymanski（LZSS）algorithm and arithmetic combination was presented to compress SIP signaling.Simulation results prove that the new algorithm has higher compression efficiency.It is valuable for IMS SIP session setup delay.

关 键 词：会话初始化协议 LZSS算法 算术编码 信令压缩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]