A Distributed Game-Theoretic Power Control Mechanism for Device-to-Device Communications Underlaying Cellular Network

Although the Device-to-Device (D2D) technology has been extensively studied as an effective means to address the spectrum scarcity and to relieve the overload of base stations in cellular systems, the interference between D2D links and cellular links emerges as an challenging issue that must be dealt with. Among many other techniques to reduce the interference, transmitter power control plays a crucial role. In this paper, we propose a game theoretic model to acquire the compensatory power of D2D link transmitters underlaying the cellular network. This model considers not only interference between cellular links and D2D links but the interference among D2D links themselves as well. Also, it allows the compensatory power for a D2D link to be decided based on the need of this D2D link, leading to a reasonable acquisition/configuration of compensatory powers of all D2D links and an overall improvement of the communication quality. Finally, we developed a distributed compensatory power control mechanism to compute the compensatory power for each D2D link. Simulation results demonstrate the validness and rationality of this mechanism.

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