Energy efficiency in 5G access networks: Small cell densification and high order sectorisation
Energy efficiency in 5G access networks: Small cell densification and high order sectorisation
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DOI：
10.1109/iccw.2015.7247604
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发表时间：
2015-06
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影响因子：
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通讯作者：
Abdelrahman Arbi;Timothy O’Farrell
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文献类型：
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作者：
Abdelrahman Arbi;Timothy O’Farrell
在本文中，我们通过比较两种增强 RAN 容量的小型基站部署策略，评估了基于 LTE 技术的 5G 无线接入网络 (RAN) 的能源效率。具体来说，我们将使用小小区致密化 3 扇区宏小区 RAN 与在使用小小区致密化之前首先升级到 6 扇区宏小区 RAN 进行比较。后一种策略已被 4G 网络运营商应用于城市地区。本文使用能量消耗增益（ECG）作为品质因数。无线基站功耗是通过使用实际功耗模型来估计的。我们的结果表明，在 3 扇区宏蜂窝 RAN 中部署小型蜂窝覆盖比在 6 扇区宏蜂窝 RAN 中部署小型蜂窝覆盖更加节能，尽管后者使用的小型蜂窝较少。通过实施自适应分区技术可以进一步节省能源。当根据时间平均流量负载将活动扇区的数量从 6 个逐渐减少到 1 个时，6 个扇区可实现 25% 的节能。无论如何，无论是否采用自适应扇区划分技术，3 扇区选项始终更加节能。
In this paper we evaluate the energy efficiency of a 5G radio access network (RAN) based on LTE technology when comparing two small cell deployment strategies to enhance the RAN capacity. Specifically, we compare densifying a 3-sector macrocell RAN with small cells against first upgrading to a 6-sector macrocell RAN before densifying with small cells. The latter strategy has been used in urban areas by 4G network operators. The energy consumption gain (ECG) is used as a figure of merit in this paper. The radio base station power consumption is estimated by using a realistic power consumption model. Our results show that deploying a small cell overlay in a 3-sector macrocell RAN is more energy efficient than deploying a small cell overlay in a 6-sector macrocell RAN even though the latter uses fewer small cells. Further energy savings can be achieved by implementing an adaptive sectorisation technique. An energy saving of 25% is achieved for 6-sectors when progressively decreasing the number of active sectors from 6 to 1 in accordance with the temporal average traffic load. Irrespective, the 3-sector option with or without incorporating the adaptive sectorisation technique is always more energy efficient.