Direction-based topology control algorithm for mobile ad-hop networks

The topology of a mobile ad-hop network can be formed by varying transmission power of each node and this topology can be changed frequently by the mobility of nodes. In this paper, we give a detailed analysis of a direction-based distributed topology control algorithm, termed as HCTC(hill climbing topology control). HCTC is presented for improving connectivity and conserving energy over mobile ad-hop wireless networks. Besides outdoor environment which can use GPS information, applying indoor environment we do not assume that nodes have GPS information available; rather, it depends only on directional information.(Angle of Arrival) HCTC is motivated by the stochastic property of the RWP(random waypoint) mobility model(called border effect); we consider that the border effect can affect a node degree of each node in the deployment region and verify it using an analytical model(f_DEG). We also devised HCTC_REF algorithm to confirm the topology which formed by proposed algorithm.(HCTC). HCTC_REF can verify the direction of reference point which determined by HCTC. Simulation results are presented to demonstrate a set of optimization that further reduce power consumption and prove that they retain robust network connectivity.