Ad hoc网络中TDMA/CSMA融合的多址接入协议

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Ad hoc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 of Ad hoc network.