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This paper proposes an energy-efficient game-theoretic approach to the issue of resource allocation for the uplink of a multicellular OFDMA network. The problem is decoupled into subcarrier assignment and power control, assuming the data rates to be fixed for all subcarriers and all terminals in the network. To capture the tradeoff between obtaining good performance in terms of effective throughput and saving as much energy as possible, we place the power control as a noncooperative (distributed) game, in which the utility is defined as the sum of the ratios of achieved goodputs to consumed powers on a subcarrier basis. We also propose a practical algorithm for subcarrier assignment on a cell basis, based on the optimal transmit powers at the Nash equilibrium. Extensive numerical simulations on a realistic multi-cellular scenario are provided to evaluate the performance of the proposed scheme.

Uplink power control and subcarrier assignment for an OFDMA multicellular network based on game theory