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arXiv 1909.07700cs.ITmath.IT
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无线供电通信网络的高效、公平和QoS-Aware策略

Efficient, Fair and QoS-Aware Policies for Wirelessly Powered Communication Networks

Roohollah Rezaei, Naeimeh Omidvar, Mohammad Movahednasab, Mohammad Reza Pakravan, Sumei Sun, Yong Liang Guan

摘要:

无线功率传输(WPT)是用于无线供电通信网络(WPCN)的可行能量源。在本文中,我们首先考虑WPT从一个能源接入点(E-AP)到多个能源接收器(E-R),以获得最佳的政策,最大限度地提高WPT效率。为了这个目的,我们制定的问题,最大化的E-R的平均和峰值功率电平的限制的E-AP的总平均接收功率。该问题是一个非凸随机优化问题。使用一些随机优化技术,我们解决这个问题的挑战,并推导出一个封闭形式的表达式的最优解,这需要明确的知识,在网络中的信道状态信息(CSI)的分布。然后,我们提出了一个接近最优的算法,不需要任何明确的知识的CSI分布,并证明该算法达到一个接近最优的解决方案,在一个保证的差距,以最优的解决方案。接下来,我们考虑E-R之间的公平性,并提出了一个服务质量(QoS)感知的公平策略,最大化的通用网络效用函数,同时保证所需的QoS的每个E-R。最后,我们研究了一个实际的无线供电的通信场景中,E-R利用他们的能量收集通过WPT传输信息到E-AP。我们在E-AP的平均和峰值传输功率约束以及E-R的公平性约束下优化E-AP处接收的信息。数值结果表明,我们提出的解决方案相比,国家的最先进的基线显着的性能。

英文摘要:

Wireless power transfer (WPT) is a viable source of energy for wirelessly powered communication networks (WPCNs). In this paper, we first consider WPT from an energy access point (E-AP) to multiple energy receivers (E-Rs) to obtain the optimal policy that maximizes the WPT efficiency. For this purpose, we formulate the problem of maximizing the total average received power of the E-Rs subject to the average and peak power level constraints of the E-AP. The formulated problem is a non-convex stochastic optimization problem. Using some stochastic optimization techniques, we tackle the challenges of this problem and derive a closed-form expression for the optimal solution, which requires the explicit knowledge of the distribution of channel state information (CSI) in the network. We then propose a near-optimal algorithm that does not require any explicit knowledge of the CSI distribution and prove that the proposed algorithm attains a near-optimal solution within a guaranteed gap to the optimal solution. We next consider fairness among the E-Rs and propose a quality of service (QoS) aware fair policy that maximizes a generic network utility function while guaranteeing the required QoS of each E-R. Finally, we study a practical wirelessly powered communication scenario in which the E-Rs utilize their energy harvested through WPT to transmit information to the E-AP. We optimize the received information at the E-AP under its average and peak transmission power constraints and the fairness constraints of the E-Rs. Numerical results show the significant performance of our proposed solutions compared to the state-of-the-art baselines.

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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