WiMAX自适应健壮性报头压缩算法  

WiMAX Adaptive Robust Header Compression Algorithm

作　　者：崔成华[1] 郭伟[1] 刘伟[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都610054

出　　处：《通信技术》2010年第5期148-150,212,共4页Communications Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(NO:2009CB320405)

摘　　要：由于WiMAX通信传输协议框架中各层协议的报头含有太多的冗余信息,导致了无线信道带宽的利用率较低。同时由于分组过长也会引起误码率的增加。为了解决WiMAX中报头开销过大问题,提高无线信道带宽利用率,结合ROHC压缩算法和WiMAX MAC协议,提出了WiMAX自适应健壮性报头压缩方案。通过分析W-LSB编码,给出了自适应健壮性报头压缩算法在WiMAX的实现过程。仿真结果表明:该算法可以将60个字节的RTP/UDP/IPv6报头压缩到1～3个字节;可以适应WiMAX通信系统链路特性经常变化的无线信道,能够在报头压缩率和抗差错鲁棒性之间获得较好的平衡性。The protocol header of transfer protocol framework for WiMAX contains much redundant information,resulting in lower utilization of wireless channel bandwidth.And the too-long packet would increase the bit error rate.In order to reduce the protocol header size in WiMAX network and improve the available bandwidth efficiency of wireless channel,and by integrating ROHC compression algorithm and WiMAX MAC protocol,a new WiMAX adaptive robust compression scheme is proposed.Through analysis on the W-LSB encoding,the implementatiion of adaptive robust header compression algorithm over WiMAX is given.Simulation results show that the 60-bytes header of RTP/UDP/IPv6 could be compressioned to 1～3 bytes;this algorithm could achieve good balance of compression ratio and error-resistant robustness for the adaptive use in wireless links.

关 键 词：健壮性报头压缩 W-LSB编码 上下文 鲁棒性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]