LTE系统中适应链路层机制的TCP头压缩算法  

Link Layer Adaption TCP Header Compression Algorithm in LTE System

作　　者：曾宇辉[1,2] 朱光喜[1,2] 吴伟民[1,2] 沈钊[1,2] 

机构地区：[1]华中科技大学电子与信息工程系,武汉430074 [2]国家光电实验室光通信与智能网络研究部,武汉430074

出　　处：《小型微型计算机系统》2012年第4期819-824,共6页Journal of Chinese Computer Systems

基　　金：国家科技支撑计划项目(2008BAH30B09)资助;国家重大专项基金项目(2010ZX03003-001;2009ZX03003-007)资助;国家"八六三"高技术研究发展计划项目(2008AA01Z204;2009AA01Z205)资助;国家自然科学基金项目(60802009)资助;新世纪优秀人才支持计划项目(NCET070339)资助;湖北省基金项目(2009CDA150资助

摘　　要：LTE系统采用全IP承载,具有比以往无线系统更高数据速率和容量.为了能够有效利用无线带宽资源,LTE系统中采用了ROHC(robust header compression)信头压缩协议对无线分组进行压缩.针对ROHC协议算法复杂度过高实现困难以及对高速数据业务的适应性较差等特点,提出一种适应LTE链路层机制的TCP头压缩算法.仿真结果表明,相比ROHC协议,本文提出的算法具有更高的头部压缩效率,进一步提高无线带宽资源的利用效率,同时,也能更好的适应LTE系统的高带宽环境,具有较低的算法复杂度和良好的稳健性和适用性.LTE system is all IP network, with higher data rates and capacity than ever before wireless systems. ROHC （robust header compression） header compression protocol has been used in LTE system for wireless packet compression to effectively wireless utilization. But ROHC algorithm complexity is too high to achieve the difficulties and the poor adaptability of high-speed data services and so on. With the consistency of TCP connection tracking table, we proposed an link layer adaption mechanism TCP header com- pression algorithm. Simulation results show that, compared to ROHC protocol, the proposed algorithm has higher compression efficiency , and improve the utilization of wireless resources, while also better adapt to high-bandwidth environment in the LTE system, with lower computational complexity and better robustness and applicability.

关 键 词：LTE TCP 头压缩 健壮性头压缩协议(ROHC) 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]