面向车辆自组织网络的模糊路由协议

Fuzzy routing protocol for vehicular ad hoc network

为解决车辆自组织网络路由不稳定的问题,提出一种模糊路由协议。利用车辆无线电设备获取各节点的距离、位置、方向、速度4个度量,采用高斯隶属度函数将4个度量模糊化,制定控制规则对4个模糊变量进行模糊推理,采用区域质心方法去模糊,选择最大输出值对应的节点作为最佳下一跳节点,逐跳寻找最佳下一跳节点得到最优路由。仿真结果表明,与经典的GPSR和GPSR-R方法相比,该方法数据包传递成功率高、丢包率低、传输时延小。

For solving the routing instability problem in vehicular ad hoc network,a fuzzy routing protocol was proposed.Nodes＇ distance,position,direction and speed were obtained using the radio devices on vehicular.Fuzzification for four metrics was executed using Gauss membership functions.A control rule was developed and fuzzy inference was executed for four fuzzy variables.Defuzzification was executed using centroid of area method,the node corresponding to the maximum value was selected as the best next-hop node,and the best route was obtained by selecting the best next-hop node hop by hop.Simulation results show that,comparing with the classical GPSR and GPSR-R methods,the proposed method has higher packet delivery rate,lower packet loss rate and smaller transmission delay.