RF Energy Transfer for Cooperative Networks: Data Relaying or Energy Harvesting?
RF Energy Transfer for Cooperative Networks: Data Relaying or Energy Harvesting?
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DOI：
10.1109/lcomm.2012.091712.121395
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发表时间：
2012-11-01
期刊：
影响因子：
--
通讯作者：
Sasaki, Shigenobu
中科院分区：
文献类型：
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作者：
Krikidis, Ioannis;Timotheou, Stelios;Sasaki, Shigenobu
这封信涉及一个三节点协作网络，其中中继节点从射频（RF）辐射中获取能量。源节点是唯一可用的RF发生器，并在能量收集和数据中继之间引入基本切换。一个贪婪的切换（GS）的策略，中继节点发送时，其剩余能量，确保在目的地的解码进行了研究。GS策略被建模为离散电池的马尔可夫链，稳态分布和系统的中断概率推导出封闭形式的表达式。此外，提出了一种结合信道系数先验知识的最优切换策略，并通过混合整数线性规划求解。
This letter deals with a three-node cooperative network where the relay node harvests energy from radio frequency (RF) radiation. The source node is the only available RF generator and introduces a fundamental switching between energy harvesting and data relaying. A greedy switching (GS) policy where the relay node transmits when its residual energy ensures decoding at the destination is investigated. The GS policy is modeled as a Markov chain for a discretized battery; the stationary distribution and the outage probability of the system are derived in closed form expressions. In addition, an optimal switching policy that incorporates a-priori knowledge of the channel coefficients is proposed and solved by a mixed-integer linear programming formulation.