Link-gain based power control mechanism for Wireless Sensor Networks

Recently, the topology control strategies attract more and more the research community as being a crucial issue to be handled for the Wireless sensors networks (WSNs). In this paper, we propose a centralized power control mechanism based on the link gain information to reduce network energy consumption. Our mechanism works through two steps, first we construct a skeleton that ensure network connectivity while reducing considerably the number of links in the network. Second, based on the obtained skeleton, we reduce the power transmission for each node while keeping a connectivity with a node of the skeleton with a link gain greater than a predefined threshold. The simulation results conducted over TOSSIM, show that our proposal can save the network energy up to 10% while achieving better PDR value, which goes near to 12% compared to non-optimized network.