Relay-Centric Two-Hop Networks with Asymmetric Wireless Energy Transfer: A Multi-Leader-Follower Stackelberg Game
Relay-Centric Two-Hop Networks with Asymmetric Wireless Energy Transfer: A Multi-Leader-Follower Stackelberg Game
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DOI：
10.1109/icc.2018.8422085
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发表时间：
2018-05
期刊：
影响因子：
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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
本文研究了一个由一个源、多个中继器和多个目的地组成的两跳无线能量传输网络。中继站的主要目标是将自己的信息传递到自己的目的地。每个中继站的消息与发往同一目的地的源信息一起被发送到其关联的目的地。作为对继电器的激励，信号源通过无线射频信号向继电器提供无线能量传输。继电器收集能量，一个接一个地接收信息。在通电顺序上更低的中继会导致延迟，但能够从之前的时隙获取，因此能够积累更多能量，直到轮到它们传输，从而建立能量延迟权衡。我们制定了一个多领导者-追随者Stackelberg博弈来捕捉节点的自利和等级竞争性质。中继-目的地对扮演领导者，而源-目的地对扮演追随者。我们在效用函数中考虑了数据速率、能量成本和延迟。证明了Stackelberg均衡的存在唯一性，并给出了集中式和分布式两种实现Stackelberg均衡的算法。数值结果验证了分析结果。
This paper studies a two-hop network with wireless energy transfer consisting of one source, multiple relays, and multiple destinations. The relays' main objective is to communicate their own messages to their own destinations. The message of each relay is transmitted to its associated destination along with the source's information that is intended for the same destination. As an incentive for relaying, the source offers wireless energy transfer to the relays via radio frequency signals. The relays harvest energy and receive information one by one. The relays that are further down in the order in which they are powered incur delay, but are able to harvest from previous time slots and thus are able to accumulate more energy until it is their turn to transmit, thus establishing an energy-delay trade-off. We formulate a multi-leader-follower Stackelberg game to capture the self-interest and hierarchically competing nature of the nodes. The relay-destination pairs play as leaders and the source-destination pairs as followers. We incorporate data rate, energy cost and delay in the utility functions. The existence and the uniqueness of the Stackelberg equilibrium (SE) are proved, and two algorithms that achieve SE in centralized and distributed fashion are provided. Numerical results verify analytical findings.