Analysis of data compression algorithm and its improvement in ATN
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摘要: 针对航空电信网移动通信中的数据压缩问题,详细分析了无连接网络层协议(CLNP,Connectionless Network Layer Protocol)报头压缩过程和压缩性能,得出传输效率、报头压缩效率与报文长度的关系.在缺省域间路由方式下,结合ESIS(End System to Intermediate System )协议,提出了CLNP报头数据的压缩完善方案,并分析了算法的压缩性能、给出了压缩效率和数据包长的关系.仿真结果表明,该算法进一步提高了压缩效率,提高了无线信道传输效率.Abstract: To solve the data compression problem and improve the transmission efficiency in the ATN(aeronautical telecommunication network) mobile communication network, the data packets headers compression algorithm of CLNP(connectionless network layer protocol) is discussed in detail. The relationships of transmission efficiency, compression rate and packet length are given by analyzing compression procedure and capability. Combining ESIS(end system to intermediate system) protocol, an improved header compression algorithm of CLNP data packet is presented in the IDRP(inter-domain routing protocol) routing algorithm. The impression efficiency of packets headers is analyzed and the correlation between impression efficiency and packet length is given. The simulation results showed that the new algorithm could promote the compression efficiency of data packets and transmission efficiency of the network.
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[1] RFC1144, Compressing TCP/IP headers for low-speed serial links [S] [2]ISO/IEC 8473-1, Information technology protocol for providing the connection- less-mode network service [S] [3]ICAO,Manual of technical provisions for the aeronautical telecommunication network (Doc9705) [S] [4]ISO/IEC 8208, Information technology data communications-X.25 packet layer protocol for data terminal equipment [S] [5]Yang Chenglei, Zhang Jun. Header compression and its application in ATN . In:Albert K Y Lam. Proceedings of the 4th International SEATI 2003 . Hongkong:The Institution of Electrocal Engineering Hongkong, 2003. 157~162 -
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