HetNets With Range Expansion: Local Delay and Energy Efficiency Optimization
HetNets With Range Expansion: Local Delay and Energy Efficiency Optimization
复制标题
DOI：
10.1109/tvt.2019.2907519
复制
发表时间：
2019-03
影响因子：
6.8
通讯作者：
Xiaojie Dong;F. Zheng;Xu Zhu;Jingjing Luo
中科院分区：
文献类型：
--
作者：
Xiaojie Dong;F. Zheng;Xu Zhu;Jingjing Luo
在本文中，我们探讨了异构网络（HetNet）的每层可用的不同的每用户带宽和相应的下行链路范围扩展（RE，一个关键措施，以提高小小区关联）。基于层特定路径损耗指数的实际情况，我们推导出HetNet在随机不连续传输方案（DTX，用于管理干扰和降低能耗）下的本地延迟。使用这样一个新的本地延迟的表达式，我们然后分析相应的能量效率（EE）。这些延迟和EE表达式揭示了RE偏置因子和DTX静音概率都存在最佳值。一个封闭的形式的RE偏置因子的最优解也来自低速率制度。
In this paper, we explore the different per-user bandwidths available for each tier of heterogeneous networks (HetNets) and the corresponding downlink range expansion (RE, a key measure to boost small cell association). Based on the practical case of tier-specific path loss exponents, we derive the local delay of HetNets under the random discontinuous transmission scheme (DTX, employed to manage the interference and reduce energy consumption). Using such a new expression for local delay, we then analyze the corresponding energy efficiency (EE). These delay and EE expressions reveal that there exists an optimal value for both the RE bias factor and for the DTX mute probability. A closed-form optimum solution for the RE bias factor is also derived for the low-rate regime.