一个可感知干扰的无线自组网MAC协议  

An Interference-aware MAC Protocol for Wireless Ad Hoc Network

作　　者：李蓥[1] 李明禄[1] 伍民友[1] 

机构地区：[1]上海交通大学计算机科学与工程系,上海200240

出　　处：《小型微型计算机系统》2008年第6期1031-1035,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60573138)资助;国家"九七三"计划项目(2006CB303000)资助;江苏省计算机信息处理技术重点实验室开放课题项目(KJS0605)资助

摘　　要：在分析无线自组织网中隐终端和暴露终端问题的基础上,指出在802.11MAC协议中,造成这两类问题的根本原因是其采用了简化的干扰模型,并提出一个基于busy tone的、可以感知干扰的MAC协议(IABT)用来提高无线自组织网的性能.通过在busy tone中编码当前的干扰信息,busy tone可以有效的为将要进行的通信预留信道.IABT协议可同时解决隐终端和暴露终端的问题.通过NS2的模拟仿真,显示出IABT协议可以有效的减少MAC层的冲突,从而提高了无线自组织网的性能.Exposed and hidden terminal problems decrease the performance of 802.11 MAC protocol in wireless Ad hoc Network. This paper points out that the two problems are due to a single fundamental reason, that is, 802.11 uses an oversimplified interference model, and proposes an interference-aware busy tone based MAC protocol （IABT） to improve the throughput of wireless Ad hoc Network. Encoding the interference information in the frequency, a busy tone will reserve the space necessary for the ongoing transmission. IABT can solve both the hidden and exposed terminal problems simultaneously. Examined by NS2 simulator, the protocol can reduce the MAC collisions and improve the performance substantially.

关 键 词：MAC 802.11 BUSY TONE 干扰 隐终端 暴露终端 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]