Research On Energy Efficient Algorithm Based On AODV Routing Protocol In Ad Hoc Networks

In recent years,with the rapid development of Internet technology and wireless communication technology,wireless Ad Hoc network technology has received more and more attention.The wireless Ad Hoc network consists of multiple wireless nodes and is randomly deployed in the detection area.Multiple wireless nodes form a network in the form of dynamic and self-organizing networks without using any network infrastructure.Due to the limited transmission range and battery energy in Ad Hoc networks,the data transmitted by nodes generally takes the form of “multi-hop”.Therefore,it is very important to establish a reliable and energy-saving transmission path in Ad Hoc networks.Firstly,this paper deeply studies the existing AODV routing protocol,and finds the shortcomings in AODV routing protocol as follows:(1)The fixed transmission power of the nodes in the network causes the waste of energy;(2)When establishing a route,the fairness of the energy consumption between nodes is ignored,resulting in some nodes are often selected,so that their energy is exhausted prematurely;(3)After the AODV protocol selects a route,unless there are dead or removed nodes in the path,the path will be used to transmit data.This will cause premature death of individual nodes and shorten the network lifetime.In view of the above shortcomings of AODV routing protocol,this paper proposes a new energy efficient routing algorithm EAODV.The algorithm is based on the AODV routing protocol mainly in the following three aspects of improvement:(1)Dynamically control the transmission power of nodes according to the distance between nodes,saving energy consumption;(2)In the route discovery process,when a node selects a routing node,it dynamically selects one of the minimum power consumption routes and the energy balance route designed in this paper based on a marker bit representing the remaining energy,and establishes a transmission path;(3)Based on(1)and(2),a route interruption update strategy was proposed to make the RERR message to restart the route discovery process to find new routes when node energy was used excessively.Simulation results show that compared with AODV and other existing routing protocols,EAODV routing protocol can reduce network energy consumption,extend network lifetime,and improve packet delivery rate and average throughput.