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Published in:
2018 | OriginalPaper | Chapter
Stochastic Optimal Control for Power Allocation and Link Selection in Energy-Harvesting Three-Node Relay Network
Authors : Qianyun Gong, Qinbo Chen, Hui Cai, Maoxin Tian, Sai Zhao
Published in: Communications and Networking
Publisher: Springer International Publishing
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Abstract
In this paper, we consider a three-node relay network with energy harvesting (EH). Assuming the EH source equipped the energy queue, and the EH relay has energy and data queues, unlike the conventional half duplex relay, the relay experience link selection at each slot. We design a optimization approach aiming at maximizing the long-term averaged transmission rate under the energy queue and data queue length constraints. Considering the link selection and power allocation, we propose a Lyapunov optimization algorithm to solve the energy causality, then obtain the asymptotically optimality. Without requiring any knowledge of the statistics of energy arrivals and channel states, simulations show our proposed algorithm outperform the greedy algorithm and conventional relay algorithm.