Mobility Model Based on the Improved-PSO Algorithm for Ad Hoc Network

The mobility model is the research basic of routing protocols for ad hoc network.In order to solve the abrupt change of speed in the Particle Swarm Optimization(PSO) algorithm and make it suitable to be used in mobility model of ad hoc network,this paper firstly introduced the conception of acceleration and the environmental variable into the updating formulas of the velocity and displacement of the PSO algorithm,and proposed to decompose its velocity and the displacement under the rectangular coordinate system.Then we established a new mobility model based on the improved PSO algorithm,which included the obstacle model,the velocity initialization function and the boundless area.For validating the feasibility and the effectiveness of the new mobility model,we made simulation experiments using Matlab and the network simulation software OPNET.The experimental results show the mobility model based on the improved PSO algorithm makes more realistic,compared with the random waypoint mobility model(RWM),and is applicable in ad hoc network.