Optimal power policy for energy harvesting transmitters with inefficient energy storage
Optimal power policy for energy harvesting transmitters with inefficient energy storage
复制标题
DOI：
10.1109/ciss.2012.6310730
复制
发表时间：
2012-03
期刊：
影响因子：
--
通讯作者：
Kaya Tutuncuoglu;A. Yener
中科院分区：
文献类型：
--
作者：
Kaya Tutuncuoglu;A. Yener
考虑具有低效能量存储装置（即电池或电容器）的能量收集发射机，其中存储的能量的一小部分在此过程中丢失。对于给定的能量收集方案，找到了在有限时间范围内使平均速率最大化的最优传输策略。与先前的能量收集发射机的最佳功率分配结果相反，可以观察到，存储损失鼓励收获能量的瞬时消耗，而无需存储适度的收获率。当存储效率趋于统一时，该策略收敛于已知的恒功率传输策略。在最优离线策略的基础上，提出了基于恒充放电阈值的在线策略。在朴素传输策略下，模拟了最优离线算法和建议的在线算法的性能，并讨论了不同存储效率下算法的行为。
An energy harvesting transmitter with an inefficient energy storage device, i.e., battery or capacitor, is considered, where a fraction of the stored energy is lost in the process. An optimal transmission policy maximizing the average rate within a finite time horizon is found for a given energy harvesting scenario. In contrast to previous results for optimal power allocations with energy harvesting transmitters, it is observed that storage losses encourage instantaneous consumption of harvested energy without storage for moderate harvest rates. It is also shown that this policy converges to the known constant power transmission policies when storage efficiency goes to unity. Based on the optimal offline policy, an online policy based on constant charging and discharging thresholds is proposed. The performance of the optimal offline and proposed online algorithms are simulated along with naive transmission policies, and the behavior of the algorithms for various storage efficiencies is discussed.