Energy-Efficient Topology Management With Interference Cancellation in Cooperative Wireless Ad Hoc Networks

Abstract

With recent advances in parallel cooperative trans- missions between multiple source-destination pairs, interference cancellation (IC) can be achieved to improve the capacity per- formance of wireless networks. However, from energy efficiency perspective, user cooperation may not be always appealing, since the increased data rate of one user comes at the price of the energy consumed by another user. In this paper, we study the potential benefits/drawbacks of cooperative communications on network-level issues, such as the capacity and the energy efficiency. We show that, in terms of network energy efficiency, coopera- tive communications do not always outperform non-cooperative communications, and cooperative communications should be dy- namically applied in topology control to optimize the overall net- work energy efficiency. Specifically, we propose an energy-efficient topology control scheme by jointly considering the capacity and energy consumption of non-cooperative and cooperative commu- nications. Simulation results are presented to show the effective- ness of the proposed scheme.