混合供电发射机的功率分配及调度算法

Power allocation and transmission scheduling for a transmitter with hybrid energy sources

针对由固定电网和能量收集器混合供电的无线通信下行链路,研究在能量收集过程、数据到达过程以及衰落信道统计分布均未知的情况下发射机的动态功率分配及传输调度问题,目的是最小化发射机从固定电网消耗的平均电量,即提高收集的能量的利用效率.研究基于李雅普诺夫的优化方法,提出了一种低复杂度的动态功率分配以及多用户之间的传输调度算法,保证各数据队列稳定且等待时延不超过用户时延要求的条件下,使发射机从固定电源消耗的平均电量趋于最小值.仿真对比表明,该算法的性能优于其他两种贪婪算法.

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.