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Energy-Aware Mode Selection and Power Control in D2D-Enabled HetNets

Recently, telecommunication industry has witnessed an explosive growth in the number of connected devices equipped with more than one wireless interface. These multimode devices are able to connect to different wireless technologies at once to benefit from a higher throughput, a better energy efficiency (EE) and an extended battery lifetime. In this work, we analyze the behavior of devices equipped with cellular and device-to-device (D2D) interfaces with multihoming capability. We investigate the energy efficiency maximization problem under cellular and D2D communications. Yet, we propose a game theoretic framework where the interaction among cellular devices is modeled as a non-cooperative game. Next, we analyze the Nash equilibria and derive conditions of existence. An energy efficient mode selection is then discussed. Furthermore, we provide some numerical examples.