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Energy-Efficient Resource Allocation in Heterogeneous Small Cell Networks with WiFi Spectrum Sharing

机译:具有WiFi频谱共享的异构小型蜂窝网络中的节能资源分配

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In this paper, we investigate the dynamic subchannel and power allocation in licensed/unlicensed spectrum sharing heterogeneous small cell networks with incomplete channel state information (CSI). We explore the formulated problem using the Lyapunov optimization method by considering co-tier interference and cross- tier interference in both licensed and unlicensed spectrums. The constraints of the minimum user quality of service (QoS), the maximum transmit power limit and the unique of subchannel allocation are also considered to achieve the optimal power and subchannel allocation. Based on the framework of Lyapunov optimization, the problem of energy efficient (EE) optimization can be broken down into three subproblems. Two of which are linear and the rest can be solved by introducing Lagrangian function. The mathematical analysis and simulation results confirm that the proposed scheme can achieve a significant utility performance gain and the EE-delay tradeoff.
机译:在本文中,我们研究了在具有不完整信道状态信息(CSI)的异构/小型共享频谱的许可/非许可频谱共享中的动态子信道和功率分配。通过考虑许可频谱和非许可频谱中的同层干扰和跨层干扰,我们使用Lyapunov优化方法探索了所提出的问题。还考虑了最小用户服务质量(QoS),最大发射功率限制和子信道分配的唯一性的约束,以实现最佳功率和子信道分配。基于Lyapunov优化的框架,能效(EE)优化问题可以分为三个子问题。其中两个是线性的,其余的可以通过引入拉格朗日函数来求解。数学分析和仿真结果证实,该方案可以实现显着的公用事业性能增益和EE延迟权衡。

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