基于分簇结构的移动自组织网络接入控制协议关键技术研究

摘要

CM-MAC protocol proposed is a Mobile Ad Hoc Networks MANETs) medium access control(MAC) protocol based on clustering structure.The protocol is mainly applicable to largescale multi-hop mobile ad hoc networks.It uses clustering technology to divide the entire largescale network into many clusters.These clusters do not interfere with each other because each cluster has a different operating frequency band.In a cluster,a dynamic TDMA protocol is used and network resources are dynamically occupied by nodes according to their traffic lows.Intercluster communication is realized through gateway nodes.In the end we use OPNET Modeler software to model and simulate the CM-MAC protocol.The results show that,in the large-scale network,the CM-MAC protocol increases throughput at about 2.2 times,improves slot reuse rate at about 4 times,and reduces the end-to-end delay at about 3 times than the standard USAP protocol.%提出了一种基于分簇结构的移动自组织网络(MANETs)接入控制协议(CM-MAC).该协议主要适用于大规模多跳移动自组织网络,采用分簇技术将整个大规模网络分成多个簇,每个簇拥有不同的工作频段,各个簇之间互不干扰.簇内采用了动态时分多址协议,每个节点根据自身业务强度动态地占用网络资源,簇与簇之间通过网关节点实现跨簇通信.本文采用了OPNET Modeler进行网络建模和仿真,仿真结果表明:在大规模拓扑网络中,CM-MAC协议比标准USAP协议的吞吐量提升了约2.2倍,时隙复用率提升了约4倍,端到端延时降低了约3倍.