Abstract:
Based on SigComp (signaling compression) frame, the initial dictionary is enlarged referred to the static phrases dictionary presented by IETF. According to the characteristics of SIP messages, the data-compress algorithm——LZW(Lempel-Ziv Welch) is modified and combined with a simplified arithmetic encoding algorithm. This modified method realizes the compression of SIP messages to decrease the transmission delay and shorten the session setup-time.
Key words:
SIP; SigComp; UDVM; LZW; No-distortion compression; Prefix-free encoding; Dictionary
摘要： 在SigComp(Signaling Compression)框架结构下，参考IETF 提出的静态短语字典扩充了初始字典，并根据SIP 消息的特点，将改进了的LZW(Lempel-Ziv Welch)算法与简化算术编码相结合，实现对SIP 消息的压缩，以达到降低传输延迟、缩短会话建立时间的目的。
关键词:
SIP；SigComp；UDVM；LZW；无损压缩；前缀编码；字典
SONG Yong, BAI Yan, ZENG Guangyu. Discussion and Research on Algorithm of SIP Messages Compression[J]. Computer Engineering, 2006, 32(6): 275-277.
宋 勇，白 燕，曾光裕. SIP 协议消息压缩算法的研究与探讨[J]. 计算机工程, 2006, 32(6): 275-277.