Ad hoc网络中TDMA/CSMA融合的多址接入协议  

Multiple access protocol with combination of TDMA and CSMA in Ad hoc network

作　　者：谭方勇[1] 叶良[1] 于复生[1] 刘昭斌[1] 

机构地区：[1]江苏省现代企业信息化应用支撑软件工程技术研发中心,江苏苏州215104

出　　处：《计算机工程与设计》2011年第11期3656-3659,3681,共5页Computer Engineering and Design

基　　金：江苏省现代企业信息化应用支撑软件工程技术研发中心开放基金项目(SX201001)

摘　　要：为了解决在网络规模庞大、节点数量众多及数据业务负载极高的Adhoc网络中网络延迟和接入延时过大的问题,提出了以TDMA为基本多址接入方式,且采用固定与动态结合的调度算法。在固定分配时采用基本的TDMA接入方式,在进行动态分配时,采用基于竞争的CSMA方案,且对原有的TDMA协议和CSMA协议进行了改进,提出了更加适合这种新的多址接入方式的时隙与帧结构。实例仿真结果表明,该算法减小了网络时延,并改善了Ad hoc网络的性能。To solve the problem of greater network lag and longer access delay on the condition of large scale network and great amount of nodes, a method based on the multiple access method of TDMA and adopts the schedule methods which combine fixed allocation with dynamic allocation is proposed. The Access method can be conversed from basic TDMA to competitive CSMA. The algorithm also improves the TDMA protocol and CSMA protocol, and the better time-slot and frame structure is proposed in order to fit the new multiple access method. Results of the simulation indicate that this algorithm can reduce the network lag and improve performance ofAd hoc net- work.

关 键 词：ADHOC网络 MAC层 多址接入 载波侦听多路访问 时分多路访问 仿真 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]