Energy Efficiency Analysis of UAV-Assisted mmWave HetNets
Energy Efficiency Analysis of UAV-Assisted mmWave HetNets
复制标题
DOI：
10.1109/icc.2018.8422870
复制
发表时间：
2018-07
期刊：
影响因子：
--
通讯作者：
Syed Naqvi;Jacob Chakareski;Nicholas Mastronarde;J. Xu;F. Afghah;Abolfazl Razi
中科院分区：
文献类型：
--
作者：
Syed Naqvi;Jacob Chakareski;Nicholas Mastronarde;J. Xu;F. Afghah;Abolfazl Razi
我们研究的下行链路传输在一个多频段的异构网络，包括无人机（UAV）的小型基站和地面的双模毫米波小小区的微波（$\mu W$）宏基站的覆盖范围内。我们制定了一个两层的优化框架，同时找到有效的覆盖半径的无人机和能源效率的无线电资源管理的网络，受到最低服务质量（QoS）和最大传输功率的限制。外层根据最大允许路径损耗导出每个UAV的最佳覆盖半径/高度。内层制定了一个优化问题，以最大限度地提高系统的能量效率（EE），定义为总用户数据传输速率的系统和它的总能量消耗（下行链路传输和电路功率）之间的比率。我们证明了在目标SINR $\displaystyle \tau$的某些值下，引入UAV基站使EE加倍。我们还表明，$\displaystyle \tau$的增加超过最佳EE点会降低EE。
We study downlink transmission in a multi-band heterogeneous network comprising unmanned aerial vehicle (UAV) small base stations and ground-based dual mode mmWave small cells within the coverage area of a microwave ($\mu W$) macro base station. We formulate a two-layer optimization framework to simultaneously find efficient coverage radius for the UAVs and energy efficient radio resource management for the network, subject to minimum quality-of-service (QoS) and maximum transmission power constraints. The outer layer derives an optimal coverage radius/height for each UAV as a function of the maximum allowed path loss. The inner layer formulates an optimization problem to maximize the system energy efficiency (EE), defined as the ratio between the aggregate user data rate delivered by the system and its aggregate energy consumption (downlink transmission and circuit power). We demonstrate that at certain values of the target SINR $\displaystyle \tau$ introducing the UAV base stations doubles the EE. We also show that an increase in $\displaystyle \tau$ beyond an optimal EE point decreases the EE.