This letter considers a point-to-point data transmission scheme over a fixed number of slots where the energy harvesting transmitter operates in harvest-use-store (HUS) mode and an imperfect supercapacitor with storage loss and energy leakage loss is used as an energy storage device. For these settings, the dynamic programming (DP) method is known to achieve the optimal throughput, but the ` curse of dimensionality' necessitates the search of schemes that allow for an improved performance-complexity trade-off. The work focuses on deriving a computationally efficient online transmission policy that achieves the optimal or near-optimal throughput. This letter presents a novel computationally efficient uniform thresolding based online transmission policy that achieves near-optimal throughput. The work also presents numerical results which demonstrate that the proposed policy with supercapacitor-based energy storage achieves better or the same performance as compared to the battery-based energy storage, thus allowing for a longer lifetime of sensor networks.

中文翻译：

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具有能量损失的能量收集传感器节点的在线传输策略


这封信考虑了固定数量时隙上的点对点数据传输方案，其中能量收集发射器以收集-使用-存储（HUS）模式运行，并且具有存储损耗和能量泄漏损耗的不完美超级电容器被用作能量存储设备。对于这些设置，已知动态规划 (DP) 方法可以实现最佳吞吐量，但“维数灾难”需要搜索能够实现改进的性能与复杂性权衡的方案。这项工作的重点是推导计算高效的在线传输策略，以实现最佳或接近最佳的吞吐量。这封信提出了一种新颖的计算高效的基于统一阈值的在线传输策略，可实现接近最佳的吞吐量。这项工作还提供了数值结果，表明与基于电池的能量存储相比，基于超级电容器的能量存储所提出的策略实现了更好或相同的性能，从而延长了传感器网络的使用寿命。