DSR Protocol Optimization In Mobile Ad Hoc Networks

A mobile Ad Hoc network is a self-organizing network composed of mobile nodes.It does not require fixed infrastructure communication support,no central control nodes.Nodes in a mobile Ad Hoc network can move randomly in the network.Communication between nodes within the network needs to be transferred to the destination node by forwarding of multiple nodes.Due to the special nature of mobile Ad Hoc networks,the routing protocols in such networks must be designed with the characteristics of the network in mind.Today,routing protocol research has become an important part of mobile Ad Hoc network research.As a classic protocol in the on-demand routing protocol,the DSR protocol also has its own drawbacks.This article focuses on two shortcomings in the DSR protocol.Firstly,an improved mechanism of route response storm prevention based on load balancing is proposed.In order to reduce the frequency of route initiation of the network,the DSR protocol adopts a route caching mechanism.In the route caching mechanism of the DSR protocol,there may be a routing response storm problem in which multiple nodes respond to the same node routing request.In order to solve this problem and improve the load balance of the network,this paper selects the node queue ratio and the minimum residual energy of the node as the load balancing state parameters of the route,and combines the two parameters into one parameter.By judging the size of the parameter,the source node will select the appropriate routing information in the routing response packet sent by many nodes to forward the data packet.Secondly,a scheduling algorithm based on node load balancing is proposed.The standard for the shortest path in the DSR protocol is defined as the minimum hop count.Therefore,sometimes the route selected by the protocol does not guarantee the load balancing state of the network.In this paper,based on the analysis of the queue length of nodes,a load balancing scheduling algorithm is proposed based on an exponential smoothing method and packet classification method.Finally,two improved simulations of DSR are completed in Ns2 environment,and a new LBDSR protocol is formed.In three different network scenarios,DSR protocol and LBDSR protocol are compared and analyzed.The experimental results show that compared with DSR protocol,LBDSR protocol achieves a certain improvement in load balancing.