Institute of Electrical & Electronic Engineers
Increasing concerns about climate change are generating significant interest among researchers in reducing the energy consumption of existing communication infrastructure. However, previous research into the efficiency of cooperative communication networks only considers throughput or energy consumption separately. In response, this paper explores the trade-off between these two important factors and proposes maximizing energy efficiency, defined as the ratio of throughput over energy consumption. Because recent research demonstrates that machine operations require more energy, the authors propose optimally switching off unnecessary relays, while efficiently exploiting Adaptive Modulation (AM) to ensure that all multicast users can be served simultaneously under a required bit error rate.