Energy Efficiency Optimization in LTE-U Based Small Cell Networks

Energy Efficiency Optimization in LTE-U Based Small Cell Networks
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基于 LTE-U 的小型蜂窝网络的能效优化

DOI:
10.1109/tvt.2018.2886558
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发表时间:
2019-02
影响因子:
6.8
通讯作者:
Yuen Chau
Yuen Chau
中科院分区:
计算机科学2区
文献类型:
--
作者:
Yin Rui;Zhang Yunfeng;Dong Fang;Wang Anding;Yuen Chau

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在该对应关系中,针对基于LTE未授权(LTE-U)的小小区网络提出了能量有效(EE)优化方案。小小区与宏基站重用许可频带,并且与多个Wi-Fi接入点共享未许可频带。因此,在授权频带上存在同信道干扰,并且在非授权频带上存在冲突。为了最大化系统EE,同时保证与宏小区和Wi-Fi网络的和谐共存,频谱(许可和未许可两者)和功率分配被联合考虑以形成非凸优化问题。在此基础上,应用凸逼近和经典的Dinkelbach方法,得到了最优方案.基于该方案,揭示了授权频段和非授权频段上EE之间的相互作用,并通过仿真验证了该方案的性能。
In this correspondence, an energy efficient (EE) optimization scheme is proposed for the LTE-unlicensed (LTE-U) based small cell networks. The small cell reuses the licensed bands with the macro base station and shares the unlicensed bands with multiple Wi-Fi access points. Therefore, there exists co-channel interference on licensed bands, and the collision on unlicensed bands. To maximize the system EE while guaranteeing the harmonious coexistence with macro cell and Wi-Fi networks, spectrum (both licensed and unlicensed) and power allocation are jointly considered to formulate a non-convex optimization problem. Accordingly, convex approximation and the classic Dinkelbach method are applied to derive the optimal scheme. Based on the proposed scheme, the interaction between the EE on licensed and unlicensed bands are revealed, and the performance of the scheme is verified via the simulation.
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