An Energy Efficient Topology Control for Ad Hoc Networks with Steered Beam Antennas

Topology control aims to maintain network connectivity and reduce energy consumption for Ad hoc networks using steered beam directional antennas.To derive analytical expressions to determine the critical transmission range and neighbor number K,we employ quadrat statistical methods.A distributed neighbor-based topology control approach,referred to as the DK-Neigh,is proposed to maintain the outdegree of every node equal to or slightly below a specific value K.The approach can build the resulting communication graph with high probability connected.Extensive simulations are carried out,which show that the DK-Neigh is to achieve a high probability (more than 96 percent) of connectivity.If width of beam is smaller than 60 degree,average energy cost of nodes is reduced at least 15 percent than the topology control protocol K-Neigh using omni-directional antennas.Simulations show the DK-Neigh is more energy-efficient while maintaining network connectivity.