User Selection of Mobility Control for Throughput Improvement in Ad Hoc Networks

We propose an optimal user selection method on mobility control for ad hoc networks to improve QoS. In the proposed method, the best user, which is the best movable user for QoS, is selected based on physical distances between users in an ad hoc network and on the connection relationships between the users. The method also indicates the best destination to move that user to within a reasonable time. To reduce the search cost to obtain the best destination, the proposed method reduces the areas to be searched by identifying the discrete positions where transmission rates change according to the measurement data model. All the identified positions are examined to determine whether to relay another user to determine the best position. The evaluation results show that the proposed method achieved 99.0% of the maximum throughput obtained by moving the best user to the best destination. Throughput improvement of 10.3% was achieved compared with the conventional user mobility control method, which adopts a heuristic approach. Although the proposed method requires more running time than the conventional heuristic approach, it remains within a reasonable time.