A Spectrum and Energy Cooperation Strategy in Hierarchical Cognitive Radio Cellular Networks
A Spectrum and Energy Cooperation Strategy in Hierarchical Cognitive Radio Cellular Networks
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DOI：
10.1109/lwc.2016.2531078
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发表时间：
2016-02
影响因子：
6.3
通讯作者：
Kun-Yueh Hsieh;F. Tseng;Meng-Lin Ku
中科院分区：
文献类型：
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作者：
Kun-Yueh Hsieh;F. Tseng;Meng-Lin Ku
在这封信中，我们提出了一种新的频谱和能量合作策略在层次认知无线电（HCR）蜂窝网络。在我们的设计中，主接收机（PR）配备了分时能量收集（EH）装置，这样主系统（PS）可以将其频谱共享给副系统（SS），并从副基站（SB）收集辐射进行充电。为了实现这种双赢策略，在保证PS的信息率和收获能量的前提下，通过最大化SS的信息率来共同优化SB的预编码器和分时因子。采用半定松弛（SDR）优化方法对设计问题进行了等效表述和求解。仿真结果表明，所提出的合作策略具有良好的性能。
In this letter, we proposed a novel spectrum and energy cooperation strategy in a hierarchical cognitive radio (HCR) cellular network. In our design, the primary receiver (PR) is equipped with a time-splitting energy harvesting (EH) device such that the primary system (PS) can share its spectrum to the secondary system (SS) and harvest the radiation for charging from the secondary base station (SB) in return. To achieve such a win–win strategy, the SB’s precoder and the time-splitting factor are jointly optimized by maximizing the SS’s information rate, providing that the PS’s information rate and harvested energy are guaranteed. The design problem is equivalently formulated and solved via a semidefinite relaxation (SDR) optimization approach. Simulation results show the promising performance of the proposed cooperation strategy.