Energy-efficient topology control with selective diversity in cooperative wireless ad hoc networks

When energy efficiency is considered, cooperative communications may not be appealing since it involves multiple nodes in transmissions. To exploit the benefits of distributed user cooperation in cooperative wireless ad hoc networks (WANETs), we propose a distributed energy-efficient selective diversity (EESD) topology control to improve energy efficiency in the network, which jointly considers network capacity and energy consumption in terms of bits per Joule. EESD forms transmission coalitions via cooperative manner (i.e, diversity) selections, by taking into account the cost of channel information exchange. We then formulate EESD as a coalition game and propose an adaptive coalition formation algorithm for EESD with proved convergence property and stable coalition structures. Simulation results show the performance improvement of EESD in energy efficiency compared to the existing topology control schemes.