Threshold-Based RRH Switching Scheme Considering Baseband Unit Aggregation for Power Saving in a Cloud Radio Access Network
Threshold-Based RRH Switching Scheme Considering Baseband Unit Aggregation for Power Saving in a Cloud Radio Access Network
复制标题
DOI：
10.1109/jsyst.2018.2890130
复制
发表时间：
2019-01
影响因子：
4.4
通讯作者：
Yunseong Lee;Keisuke Miyanabe;Hiroki Nishiyama;N. Kato;Takashi Yamada
中科院分区：
文献类型：
--
作者：
Yunseong Lee;Keisuke Miyanabe;Hiroki Nishiyama;N. Kato;Takashi Yamada
移动的数据业务量的增加降低了网络性能。为了改善这种情况，已经引入了一种称为云无线电接入网络（C-RAN）的新型网络架构。在现有文献中，C-RAN中的功率节省在以下两个部分中实现：远程无线电头端（RRH）或基带单元（BBU）。然而，这样的功率节省方案彼此不协作，从而增加了C-RAN的功率消耗。这个领域的研究人员尚未探索这种可能性。因此，在这项研究中，我们研究RRH和BBU的功耗之间的权衡，并提出了一种新的节能方案与RRH切换和BBU聚合。在所提出的解决方案中，我们制定了一个理论模型的BBU聚合与RRH流量阈值估计活动RRH和BBU的数量。基于理论模型，我们提出了最佳的流量阈值，最小化的RRH和BBU的总功耗。数值和仿真结果表明，所提出的基于流量阈值的方法可以降低C-RAN的总功耗。此外，结果表明，RRH和BBU的功耗之间存在折衷。
The increase in the volume of mobile data traffic degrades network performance. To improve this situation, a novel network architecture called cloud radio access network (C-RAN) has been introduced. In the existing literature, power saving in C-RAN is implemented in the following two parts: remote radio heads (RRHs) or baseband units (BBUs). However, such power saving schemes do not cooperate with each other, thereby increasing the power consumption of C-RAN. This possibility remains unexplored by researchers in the field. Therefore, in this study, we investigate the tradeoff between the power consumptions of RRHs and BBUs, and propose a novel power saving scheme with RRH switching and BBU aggregation. In the proposed solution, we formulate a theoretical model of BBU aggregation with an RRH traffic threshold to estimate the number of active RRHs and BBUs. Based on the theoretical model, we propose the optimal traffic threshold that minimizes the total power consumption of RRHs and BBUs. Numerical and simulation results reveal that the proposed traffic-threshold-based approach can reduce the total power consumption of C-RAN. Moreover, the results demonstrate that there is a tradeoff between the power consumptions of RRHs and BBUs.