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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number8610183
Pages (from-to)2676-2687
Number of pages12
JournalIEEE Systems Journal
Volume13
Issue number3
DOIs
Publication statusPublished - 2019 Sep 1

Keywords

  • Base stations (BSS)
  • energy consumption
  • energy efficiency
  • radio access networks
  • resource management

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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