| Abstract: | The problem of dynamic power allocation and transmission scheduling for a transmitter powered by hybrid energy sources (combination of power grid and energy harvesters) is studied. The goal is to minimize the time average energy consumed from the power grid, that is, to improve the utilization efficiency of the energy harvested by the harvesters under the condition of unknowing statistical distribution of the energy harvesting process, data arrival process and fading channel state. An efficient dynamic power allocation and transmission scheduling algorithm is proposed based on Lyapunov optimization, and the algorithm is simple to operate due to its low complexity. Using the proposed algorithm the power consumed by the transmitter from the power grid can be close to the minimum arbitrarily under all data queues stability, and meanwhile the algorithm guarantees that data queues cannot exceed the maximum delay. Simulation results indicate that the proposed algorithm has a better performance than other two simple algorithms. |
