基于分簇的Ad Hoc网络媒体接入控制协议C-USAP

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.

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

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 rapid changes.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-USAP can quickly adapt to the changes of the network 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 (CUSAP) for large-scale Ad Hoc networks.The protocol is based on clustering technology,the dynamic 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 protocol has the characteristics of fast convergence of routing,smooth transmission and reception,low end-to-end delay,high slot reuse rate and network flexibility.