CAJ | 학술논문

IMS(IP多媒体子系统)采用SIP协议建立和维护多媒体会话,但SIP是基于文本的协议,消息比较大,当应用于带宽小的无线网络时,会增加会话建立的时延.为缩短会话建立时间,有必要对SIP消息进行压缩.针对单一的使用压缩算法在SIP信令压缩性能方面的不足,本文在Deflate压缩算法的基础上,采用不同的压缩策略,对SIP消息实现了压缩.仿真结果表明,静态字典、用户自定义字典和共享压缩的组合方案得到了最好的压缩效果,压缩后的消息平均大小仅为原来消息大小的14%左右.
IMS(IP다매체자계통)채용SIP협의건립화유호다매체회화,단SIP시기우문본적협의,소식비교대,당응용우대관소적무선망락시,회증가회화건립적시연.위축단회화건립시간,유필요대SIP소식진행압축.침대단일적사용압축산법재SIP신령압축성능방면적불족,본문재Deflate압축산법적기출상,채용불동적압축책략,대SIP소식실현료압축.방진결과표명,정태자전、용호자정의자전화공향압축적조합방안득도료최호적압축효과,압축후적소식평균대소부위원래소식대소적14%좌우.
SIP is used in IMS(IP Multimedia Subsystem)to perform multimedia session setup and maintenance.However,SIP is text-based and has large message size,when applied to small-bandwidth wireless network,it will increase the delay of session setup.In order to reduce the call setup delay,it is necessary to compress SIP message.Since single algorithm can not effectively compress SIP signaling messages,based on Deflate compression algorithm,SIP signaling compressions are achieved using different schemes.The simulation results show that the combinatorial scheme of static dictionary,user-defined dictionary and share compression has the best effect,the size of the compressed message,on the average,is around 14% of the original message size.