The Design And Research Of MANET Routing Optimization Algorithm

MANET is a dynamic,self-organizing,multi-hop,wireless network,which consists of mobile nodes.The continual communication interrupt and the increasing traffic load,which results in the unstable MANET communication,is one of the most important issue from the MANET optimization studies.To join the optimization algorithm into the optimized routing protocol framework is the most effective solution among all.In this paper,on the basis of the single-path single-channel routing protocol research,improved multi-path multi-channel routing theory model has been expanded,which including the message format and protocol process,and so on.The mobile nodes exchange the motion state and communication state with each other,which through the link interaction and cross-layer interaction,then mobile nodes implement the relevant optimization algorithm.In the simulation research,this paper analyzes and implements the multi-channel routing simulation model in NS2 firstly,which directly achieves the expansion of multi-channel and multi-interface from down to up,and it can also meet the demand of a routing protocol to the underlying channel switching.In terms of the solution of the communication interrupt,an algorithm to estimate the stability of real-time links has been proposed,which based on the wireless link length algorithm.The algorithm is realized in the path maintenance process design,the nodes scan the local risk links through the cycle prediction of hello message,then maintain it before the link is already break.At the same time,an algorithm to estimate the stability of paths has been proposed,unlike classical AOMDV,the optimized protocol prefer to the path which has the longest average link duration.In dealing with the heavy traffic load,the band resource utilization and congestion avoidance has been considered into this paper.On the one hand,the band utilization detection algorithm is achieved in the path finding and decision process design,if the link duration judgments of paths are in the same level,the optimized protocol prefer to the path which has the highest proportion of the idle channels.On the other hand,the nodes achieve the multi-channel load balancing through the congestion perception,the algorithm based on the interface queue length and the channel busy-idle time estimate of nodes.In order to verify the validity of the optimized routing protocol,the code implement and simulation analysis of NS2 is introduced in this paper,the results show that the optimized routing protocol in this paper can increase the MANET communication performance obviously.