Research On Routing Protocol Based On Transmission Stability Under VANET Urban Environment

This paper is committed to the research of routing protocol under Vehicle Ad-hoc Network urban environment. In order to improve the stability of the communication, we carried on the detailed research about existing routing protocol and fuzzy logic. The main innovation includes:(1) Proposed the routing protocol based on classified metric and fuzzy logic. In order to deal the design problem of metric under Vehicle Ad-hoc Network urban environment, this protocol put forward that the metric types can be divided into metric of node status and metric of link status. The function of two kinds of metric is different. Metric of node status'function is to select the node that can't escape the range of current communication in future period of time. Metric of link status' function is to select an optimal communication path. Meanwhile, in order to avoid the minus effect of the improper weight value set, this protocol employ the evaluation based on fuzzy logic. The simulation results show that the protocol has high performance on multiple routing index.(2) On the basis of the first step. we carried on the research of adaptive fuzzy logic under Vehicle Ad-hoc Network urban environment and proposed the evaluation algorithm based on adaptive fuzzy logic. This algorithm use the adjustment of weight on neural network for reference. By adjusting the fuzzy field of output membership function to realize the adaptive adjustment process. The improved evaluation algorithm based on adaptive fuzzy logic will be applied in the first step and name it the routing protocol based on classified metric and adaptive fuzzy logic. The simulation results show that using the evaluation algorithm based on adaptive fuzzy logic can optimize the performance of routing protocol.The work of this paper tightly around the goal that improve communication stability. We use a variety of methods and prove the effectiveness of the proposed method through simulation results.