Topology control using distributed power management algorithm for mobile ad hoc networks

We propose a distributed power management algorithm that decides on an optimum coverage area for individual node to preserve network connectivity, reduce interference thus improve network performance with changing environment and network topology. In order to be strongly connected in the network, a node may increase its power indiscriminately causing interference. Since interference is one of the major problems in wireless network, the proposed algorithm will co-operatively reduce inter-node interference in the network. Uni-directional links are also a major source of interference as most of the routing protocol only utilizes bi-directional links. So, the algorithm will attempt to prevent such links or if required convert them into bi-directional links. We will show that the algorithm provides strongly connected and more reliable network over dynamic physical channel modeled by log-distance path loss model, log-normal shadowing model and rayleigh fading model. We will show that the proposed algorithm stabilizes node connectivity over the dynamic network and environment and even, to a certain extent, prevent node from being completely disconnected from the network. Further, it reduces interference and improves network performance.