多用户宽带网络中的无线充电控制
Wireless Power Charging Control in Multiuser Broadband Networks
摘要：
无线功率传输（WPT）技术的最新进展提供了一种具有成本效益的解决方案，可以在不中断使用的情况下对无线设备进行远程充电。在本文中，我们提出了一种有效的无线充电控制方法，利用频率分集在多用户宽带无线网络，以减少能源中断，并保持系统运行在一个有效的和可持续的状态。特别是，我们首先分析了充电控制方法的工作寿命的WPT使能的宽带系统的影响。在此基础上，提出了一种多准则的充电控制策略，该策略通过联合考虑无线设备的信道状态信息（CSI）和电池状态信息（BSI）来优化频率上的发射功率分配。在实际应用中，该方案通过一种新的有限CSI估计机制来实现，该机制嵌入了部分BSI，从而显著降低了CSI和BSI反馈的能量成本。仿真结果表明，在严格的发射功率约束下，该方法可以显著提高网络的生存时间。反过来，它也消耗较低的发射功率，以实现接近永久的网络操作比其他单一的基于标准的收费控制方法。
英文摘要：
Recent advances in wireless power transfer (WPT) technology provide a cost-effective solution to charge wireless devices remotely without disruption to the use. In this paper, we propose an efficient wireless charging control method for exploiting the frequency diversity in multiuser broadband wireless networks, to reduce energy outage and keep the system operating in an efficient and sustainable state. In particular, we first analyze the impact of charging control method to the operating lifetime of a WPT-enabled broadband system. Based on the analysis, we then propose a multi-criteria charging control policy that optimizes the transmit power allocation over frequency by jointly considering the channel state information (CSI) and the battery state information (BSI) of wireless devices. For practical implementation, the proposed scheme is realized by a novel limited CSI estimation mechanism embedded with partial BSI, which significantly reduces the energy cost of CSI and BSI feedback. Simulation results show that the proposed method could significantly increase the network lifetime under stringent transmit power constraint. Reciprocally, it also consumes lower transmit power to achieve near-perpetual network operation than other single-criterion based charging control methods.
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