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arXiv 1706.04442cs.ITmath.IT
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非协调双能量收集链路的分布式功率控制:性能界和近优策略

On Distributed Power Control for Uncoordinated Dual Energy Harvesting Links: Performance Bounds and Near-Optimal Policies

Mohit K. Sharma, Chandra R. Murthy, Rahul Vaze

摘要:

在本文中,我们考虑能量收集发射器和接收器之间的点对点链路,其中节点都不具有关于另一节点处的电池状态或能量可用性的信息。我们考虑一个模型,其中数据仅在两个节点都处于活动状态的插槽中成功交付。当一个节点开启而另一个节点处于睡眠方式时,就会发生能量损失。在每个时隙中,基于其自身的能量可用性,发射器和接收器需要独立地决定是否开启,目的是最大化长期时间平均吞吐量。我们提出了一个上限的吞吐量通过分析一个天才辅助系统,具有非因果知识的能量到达两个节点。接下来,我们提出了一个在线的政策,偶尔需要一个比特的反馈,其吞吐量是在一个比特的上限,渐近电池的大小。为了进一步减少所需的反馈,我们提出了一个时间膨胀版本的在线政策。当时间膨胀变大时,该策略不需要任何反馈,并且在电池大小上渐近地达到上限。受此启发,我们还提出了一个接近最优的完全不协调的政策。我们使用蒙特卡罗模拟来验证我们的理论结果,并说明所提出的政策的性能。

英文摘要:

In this paper, we consider a point-to-point link between an energy harvesting transmitter and receiver, where neither node has the information about the battery state or energy availability at the other node. We consider a model where data is successfully delivered only in slots where both nodes are active. Energy loss occurs whenever one node turns on while the other node is in sleep mode. In each slot, based on their own energy availability, the transmitter and receiver need to independently decide whether or not to turn on, with the aim of maximizing the long-term time-average throughput. We present an upper bound on the throughput achievable by analyzing a genie-aided system that has noncausal knowledge of the energy arrivals at both the nodes. Next, we propose an online policy requiring an occasional one-bit feedback whose throughput is within one bit of the upper bound, asymptotically in the battery size. In order to further reduce the feedback required, we propose a time-dilated version of the online policy. As the time dilation gets large, this policy does not require any feedback and achieves the upper bound asymptotically in the battery size. Inspired by this, we also propose a near-optimal fully uncoordinated policy. We use Monte Carlo simulations to validate our theoretical results and illustrate the performance of the proposed policies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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