基于分簇的Ad Hoc网络媒体接入控制协议C-USAP

C-USAP: a media access control protocol based on clustering in Ad Hoc networks

在未来大规模无线自组织网络中,不但要保证数据的高效传输,还要保证能够适应网络拓扑结构的快速变化.现有的M-USAP(改进的统一时隙分配协议)能够在一帧内完成全网控制信息的交互,每个节点拥有全网路由信息,在小规模网络中能够快速适应网络拓扑结构的变化.但是随着网络规模的增大,存在路由开销大、收敛慢、端到端时延大、节点吞吐量小、时隙复用率低和网络反应迟钝等问题.针对上述问题,提出一种适用于大规模无线自组织网络的媒体接入控制协议CUSAP(分簇式统一时隙分配协议).该协议基于分簇思想,簇内采用动态时分多址协议,簇间采用多频段分割技术,实现高效的簇内和簇间节点交互.仿真结果表明:该协议具有路由收敛快、业务收发平稳、端到端时延小、时隙复用率高和网络灵活等特点.

The future large-scale wireless Ad Hoc network, which is not only to ensure the efficient transmission of data, but also to ensure the network topology can adapt to the rapidchanges. The existing Modified-Unifying Slot Assignment Protocol （M -USAP） can complete the interaction of the control information of the whole network in one frame,and each node has entire routing information of the network. Thus,M - US AP can quickly adapt to the changes of the net-work topology in the small-scale network. Nevertheless, with the increasing of the network＇s scale,there are some shortcomings such as large routing overhead, slow routing convergence,high end-to-end delay,low node throughout, slot reuse rate and slow network response.In view of the above problems,this paper proposes a Clustering-Unifying Slot Assignment Protocol （C - USAP ） for large-scale Ad Hoc networks. The protocol is based on clustering technology,the dy-namic time division multiple access protocol is adapted to inner-cluster communication and the multi-band segmentation technology is adopted to inter-cluster communication,which achieves the interaction of inner-cluster and inter-cluster. The simulation results show that this protocolhas the characteristics of fast convergence of routing, smooth transmission andend-to-end delay, high slot reuse rate and network flexibility.