Research on a movement-based location-update algorithm under 3G network

Excessive user location updates are generated due to users local movement in traditional location update algorithms.This paper analyzed the drawback of traditional movement-based location update algorithm,and proposed a new method to solve this problem.The new method improved the performance of location update algorithms through introducing two new threshold parameters.Extensive simulations based on a three-tier hierarchical mobility database structure were performed and the performance of proposed algorithm was compared with the traditional movement-based algorithm.The simulation results show that the proposed algorithm decreases the number of local update messages significantly and reduces Ping-Pong effect efficiently.