Optimal User-Selection for User Cooperative Mobility Control in Ad Hoc Networks

In this paper, we propose and evaluate a user-selective mobility control method to improve communication performance in social ad hoc networks. In the network, the connected user depends on the relationship among users and the dynamic routing that optimizes the quality of service. The proposed method is a heuristic method that identifies the movable users and determines the user mobility direction regarding connection and location relationships. The three selected movable users are the user with a maximum number of connectable users, the user with a maximum number of connected users, and the farthest distance connected user. The direction of the user's mobility is the direction of the center of the region consisting of connectable users. The effectiveness of the proposed method is evaluated by comparing the throughput improvement and accuracy against throughput improvement at the optimal location. The calculated throughput improvement was 1.52 and the accuracy was 0.90 when the user with a maximum number of connectable users was moved by 20 meters. The throughput improvement was 1.15 and the accuracy was 0.83 when the user with a maximum number of connected users was moved by 15 meters. The throughput improvement was 1.22 and the accuracy was 0.75 when the farthest distance connected user was moved by 20 meters.