Abstract
Although full-duplex transmission can be helpful for enhancing wireless link capacity, it may require extra energy to overcome the residual self-interference. In this paper, we investigate the tradeoff between energy consumption and delay in a multichannel full-duplex wireless LAN. The goal is to minimize the energy consumption while keeping the traffic queues stable. With Lyapunov optimization, we develop a throughput optimal online scheme to achieve the goals with optimized channel assignment, transmission scheduling, and transmission mode selection. We study the influence of full-duplex transmissions on the network capacity region, prove the optimality of the proposed algorithm, and derive upper bounds for the average queue length and energy consumption, which demonstrate the energy-delay tradeoff in such systems. The proposed algorithm and the capacity region analysis are validated with simulations.
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