Research On Energy Limited Routing Protocol For Mobile Ad Hoc Networks

Mobile ad hoc network is composed of mobile terminals with self-organization characteristics which can develop a multihop,centerless and energy-limited network.It is flexible to construct and easy to maintenance.There is no need for infrastructure to it.For energy constrained mobile Ad Hoc network,this paper carries out some study from two aspects:based on topology and geographical position for the lack of the existing routing protocol in the equilibrium of node energy consumption and ensuring the stability of data transmission,specific work is as follows:In routing protocol based on topology,in view of the routing protocol is more complicated,routing overhead and give full consideration to the node mobility and energy limited,combined with ant colony optimization algorithm is simple,the characteristics of easy to implement,this paper proposes a comprehensive considering node mobility and residual energy of multipath hybrid routing protocols.For ant colony optimization algorithm is easy to fall into local optimum and lead to node resources waste serious problems,although existing introduction of random number method can solve the problem of local optimal but the shortcomings of slow convergence speed,in this article,through the design of dynamic threshold and contrast transition probability deviation degree choose different paths,to speed up the convergence of the algorithm.This design on the energy consumption rate of nodes is proposed on the basis of the concept of residual life time,using the current prediction residual energy of nodes remaining life time,at the same time,considering node position and speed information forecasting link remaining life time,and will be a combination of design information generation,according to the transition probability to choose the path of better quality,to ensure the continuity of data transmission,making the network energy consumption more balanced.In routing protocol based on geographic location,the constant motion for node and the network topology changes caused by the fracture problem of data transmission link and GPSR greedy forwarding stages according to the distance to the destination node chooses the next hop node energy consumption caused by imbalance problems,combined with the proposed in the previous chapter link remaining life time and node residual life time,first using the link remaining life time node screening,treatment of selected area preference link remaining life node for a longer time.Then,the next hop node is selected according to the remaining life time of the node,the distance from the destination node and the number of peripheral nodes in the next hop.Simulation results show that the proposed routing protocol,EM-GPSR,which comprehensively considers the mobility and energy of nodes,has lower end-to-end delay and packet loss rate under the condition of high-speed movement.In terms of energy balance,the service time of nodes is extended and the transmission efficiency of network is improved.Results indicate that,in view of the limited energy of mobile Ad Hoc networks,this paper puts forward the routing protocol based on topology and routing protocol based on geographical position in the energy balance and ensure the stability of data transmission performance got a certain level of ascension,to extend the service time of nodes and effectively reduces the network packet loss rate and delay.