Threshold-Based RRH Switching Scheme Considering Baseband Unit Aggregation for Power Saving in a Cloud Radio Access Network

Yunseong Lee, Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Takashi Yamada

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号8610183
ページ(範囲)2676-2687
ページ数12
ジャーナルIEEE Systems Journal
13
3
DOI
出版ステータスPublished - 2019 9 1

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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