Abstract
Session Initiation Protocol(SIP)was used in 3G cellular IP Multimedia Subsystems(IMS)to perform multimedia session setup and maintenance.However,it is text-based and has large messages with size frequently exceeding several hundred bytes during the setup session;consequently,it causes more setup session delay.In this paper,a new algorithm combining LZW with HUFFMAN and static dictionary was proposed,which was named as S-LZW-HUFFMAN.Simulation results prove that the new algorithm can effectively reduce the message size and shorten the session setup delay in IMS.
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