Energy-efficient joint relay node selection and power allocation over multihop relaying cellular networks toward LTE-Advanced

被引：5
作者：
Chen D. [1 ]
Ji H. [1 ]
Li X. [1 ]
机构：
[1] College of Information and Communication Engineering, Beijing University of Posts and Telecommunications
来源：
Journal of China Universities of Posts and Telecommunications | 2011年 / 18卷 / 03期
基金：
中国国家自然科学基金;
关键词：
cooperative relaying; LTE-Advanced; power allocation; relay selection; residual energy; restless bandit;
D O I：
10.1016/S1005-8885(10)60055-6
中图分类号：
学科分类号：
摘要：
Cooperative relaying is emerging as an effective technology to fulfill requirements on high data rate coverage in next-generation cellular networks, like long term evolution-advanced (LTE-Advanced). In this paper, we propose a distributed joint relay node (RN) selection and power allocation scheme over multihop relaying cellular networks toward LTE-Advanced, taking both the wireless channel state and RNs' residual energy into consideration. We formulate the multihop relaying cellular network as a restless bandit system. The first-order finite-state Markov chain is used to characterize the time-varying channel and residual energy state transitions. With this stochastic optimization formulation, the optimal policy has indexability property that dramatically reduces the computational complexity. Simulation results demonstrate that the proposed scheme can efficiently enhance the expected system reward, compared with other existing algorithms. © 2011 The Journal of China Universities of Posts and Telecommunications.
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页码：1 / 7
页数：6
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