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Distributed and Optimal Resource Allocation for Power Beacon-Assisted Wireless-Powered Communications

机译：电力信标辅助无线通信的分布式和最佳资源分配

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摘要

In this paper, we investigate optimal resource allocation in a power beacon-assisted wireless-powered communication network (PB-WPCN), which consists of a set of hybrid access point (AP)-source pairs and a power beacon (PB). Each source, which has no embedded power supply, first harvests energy from its associated AP and/or the PB in the downlink (DL) and then uses the harvested energy to transmit information to its AP in the uplink (UL). We consider both cooperative and non-cooperative scenarios based on whether the PB is cooperative with the APs or not. For the cooperative scenario, we formulate a social welfare maximization problem to maximize the weighted sum-throughput of all AP-source pairs, which is subsequently solved by a water-filling based distributed algorithm. In the non-cooperative scenario, all the APs and the PB are assumed to be rational and self-interested such that incentives from each AP are needed for the PB to provide wireless charging service. We then formulate an auction game and propose an auction based distributed algorithm by considering the PB as the auctioneer and the APs as the bidders. Finally, numerical results are performed to validate the convergence of both the proposed algorithms and demonstrate the impacts of various system parameters.
机译：在本文中，我们研究了功率信标辅助无线通信网络（PB-WPCN）中的最佳资源分配，该网络由一组混合接入点（AP）-源对和一个功率信标（PB）组成。没有嵌入式电源的每个电源都首先从其关联的AP和/或PB在下行链路（DL）中的PB收集能量，然后使用收集的能量在上行链路（UL）中向其AP发送信息。我们基于PB是否与AP合作考虑合作和非合作场景。对于合作方案，我们制定了一个社会福利最大化问题，以最大化所有AP源对的加权和吞吐量，随后通过基于注水的分布式算法解决该问题。在非合作方案中，假定所有AP和PB都是理性的和自利的，因此需要每个AP的激励才能使PB提供无线充电服务。然后，我们将PB作为拍卖人，将AP作为投标人，从而制定拍卖游戏并提出基于拍卖的分布式算法。最后，通过数值结果验证了两种算法的收敛性，并验证了各种系统参数的影响。

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