一种剩余能量感知的异构Ad Hoc网络跨层路由协议

Device/Residual Energy Aware Cross-layer Routing Protocol of Heterogeneous Wireless Ad Hoc Networks

在DSR(Dynamic Source Routing)路由协议的基础上,提出一种基于节点供电方式和剩余能量的异构无线Adhoc网络跨层路由协议DREA-DSR(Device/Residual Energy Aware Dynamic Source Routing).在存在外部资源供电和电池供电两种节点的异构网络中,该协议在选择路由时优先选择外部供电节点和最小剩余能量大的路由,避免了一些剩余能量小的节点因为过度使用导致过早的死亡而影响整个网络的性能,从而提高了整个网络的生存时间.另外,本文在IEEE802.11的基础上提出了一种改进的MAC协议,有效地解决了由于节点发射功率不同导致的单向链路问题.GloMoSim环境下的仿真实验结果表明,在异构网络环境下,与DSR路由协议相比,DREA-DSR协议能有效提高网络生存时间.

This paper proposes a new heterogeneous muting protocol DREA-DSR （Device/Residual Energy Aware Dynamic Source Routing ） which is based on DSR routing protocol. It takes the device types and residual energy of the nodes into account. In heterogeneous networks where there are battery-powered nodes and externally-powered nodes, it prefers to choose externally-powered nodes and routes having more minimum residual energy, which can avoid the shortening of network lifetime caused by excessively using nodes with low residual energy. In addition,we propose a modified MAC protocol based on IEEE 802.11 ,which effectively resolve the unidirectional links. Simulation results by glomosim indicate that DREA-DSR achieves longer system lifetime when compared to DSR rouring protocol in heterogeneous Ad Hoc networks.