Relay-Centric Two-Hop Networks With Asymmetric Wireless Energy Transfer: Stackelberg Games
Relay-Centric Two-Hop Networks With Asymmetric Wireless Energy Transfer: Stackelberg Games
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DOI：
10.1109/tgcn.2019.2910222
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发表时间：
2019-04
影响因子：
4.8
通讯作者：
Shiyang Leng;A. Yener
中科院分区：
文献类型：
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作者：
Shiyang Leng;A. Yener
本文研究了由一个源节点和多个中继节点-目的节点对组成的具有无线能量传输（WET）的两跳网络。我们关注中继的主要兴趣是将自己的消息发送到相关的目的地。作为中继的激励，WET由源提供给转发源数据作为返回的中继。我们提出了一个不对称的WET（AWET）模型，其中中继接收源信号一个接一个，但那些等待时间较长的能够积累更多的能量，从早期的信号收获。我们还考虑对称WET，广播WET和独立WET进行比较，其中源信号可以通过时分或广播由所有中继收获，或者由预期的中继独家收获。我们采用Stackelberg博弈的框架来捕捉节点的自我利益和层次竞争的性质。中继-目的地对扮演领导者，而源-目的地对扮演追随者。证明了Stackelberg平衡点的存在唯一性，并给出了一种基于最佳响应的算法。仿真结果表明，AWET协议优于其他协议。
This paper studies two-hop networks with wireless energy transfer (WET) consisting of one source and multiple relay–destination pairs. We focus on relays’ primary interest of sending their own messages to the associated destinations. As an incentive for relaying, WET is offered by the source to relays who forward source data as a return. We propose an asymmetric WET (AWET) model, where relays receive source signals one by one but those waiting longer are able to accumulate more energy by harvesting from earlier signals. We also consider symmetric WET, broadcast WET, and independent WET for comparison, where source signals can either be harvested by all relays via time-division, or via broadcasting, or harvested by intended relays exclusively. We adopt the framework of Stackelberg game to capture the self-interest and hierarchically competing nature of nodes. The relay–destination pairs play as leaders and the source–destination pairs as followers. The existence and the uniqueness of the Stackelberg equilibrium (SE) are shown, and a best-response-based algorithm that achieves the SE is provided. Simulation results demonstrate that the AWET protocol outperforms the others.