Enhancing Energy Efficiency via Device‐to‐Device Proximity Services

This chapter presents three device‐to‐device (D2D) proximity services‐based energy efficient communications schemes, namely, energy efficient cooperative wireless multicasting, green relay assisted D2D communications and green content brokerage. In green relay assisted D2D communications, the chapter introduces green relay nodes to increase the link data rate of D2D communications by leveraging cooperative communications. It proposes a novel green relay assisted D2D communications architecture, in which relay nodes powered by green energy are deployed to increase the data rates of D2D communications. In designing green relay assisted D2D communications, the chapter considers a wireless network consisting of 2N UEs and M green relay nodes, with the UEs forming N SD pairs. By leveraging D2D communications, he/she designs a novel mobile traffic offloading scheme, content brokerage. In designing the green content brokerage scheme, the he/she considers a cellular network consisting of one MBS, N UEs and one GCB.