预测辅助的Ad hoc网络路由协议

Prediction-Aided Routing Protocol in Ad hoc Network

Ad hoc网络中现有的预测路由协议在路由失效前提前修复路由却增大了路由开销.针对路由开销大的问题,提出了一种基于Ad hoc按需距离矢量路由协议并结合两种路由维护方式的预测辅助路由协议.协议中的每个节点都可能发起路由维护,根据节点在路由中的位置选择对应的路由维护方式;根据网络中节点移动特性与网络规模计算节点判决路由失效的能量阈值,确定是否发起路由维护.仿真结果表明,协议在保证网络可靠性的基础上比传统预测算法降低了3%~5%的网络路由开销,尤其适用于节点数目较多且移动速度较慢的网络.

The existing routing protocols for Ad hoc networks maintain routing before routing becomes invalid,but this method leads to a high overhead. To reduce the overhead,a prediction-aided routing protocol based on Ad hoc on-demand distance vector routing was proposed which contained two different methods of routing maintenance modes. Every node can maintain its routing based on prediction-aided routing protocol and compute the threshold which decides whether to maintain the routing with the speed of nodes and network environment. Simulation results demonstrated that proposed protocol could reduce 3% ~ 5% overhead of network than the traditional prediction algorithm on the basis of ensuring the reliability of network,especially suitable for the network environment which has more numbers of nodes and slower mobility of nodes.