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arXiv 1503.04255cs.ITmath.IT
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具有能量收集发射机和接收机的衰落无线链路的中断最小化

Outage Minimization for a Fading Wireless Link with Energy Harvesting Transmitter and Receiver

Sheng Zhou, Tingjun Chen, Wei Chen, Zhisheng Niu

摘要:

本文研究了具有能量收集发射机和接收机的衰落无线链路中最小中断的在线功率控制策略。当发射机或接收机没有足够的能量时,或者当信道处于中断时,发生中断,其中发射机仅具有信道分布信息。在无限电池容量和不重传的情况下,我们证明了基于阈值的功率控制策略是最优的。因此,我们提出了不相交/联合阈值为基础的政策,并没有电池状态之间的发射机和接收机共享,分别。我们还分析了实际的接收机检测和处理的中断性能的影响。当考虑重传时,采用线性功率电平的策略来调整每次重传的功率阈值。在电池容量有限的情况下,建立了一个三维有限状态马尔可夫链模型来计算所提出策略的最优参数和相应的性能。发射机和接收机之间的能量到达相关性解决有限和无限电池的情况下。数值结果表明,电池容量,能量到达相关性和检测成本的中断性能的建议政策,以及中断概率和平均传输时间之间的权衡的影响。

英文摘要:

This paper studies online power control policies for outage minimization in a fading wireless link with energy harvesting transmitter and receiver. The outage occurs when either the transmitter or the receiver does not have enough energy, or the channel is in outage, where the transmitter only has the channel distribution information. Under infinite battery capacity and without retransmission, we prove that threshold-based power control policies are optimal. We thus propose disjoint/joint threshold-based policies with and without battery state sharing between the transmitter and receiver, respectively. We also analyze the impact of practical receiver detection and processing on the outage performance. When retransmission is considered, policy with linear power levels is adopted to adapt the power thresholds per retransmission. With finite battery capacity, a three dimensional finite state Markov chain is formulated to calculate the optimal parameters and corresponding performance of proposed policies. The energy arrival correlation between the transmitter and receiver is addressed for both finite and infinite battery cases. Numerical results show the impact of battery capacity, energy arrival correlation and detection cost on the outage performance of the proposed policies, as well as the tradeoff between the outage probability and the average transmission times.

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