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IEICE TRANSACTIONS on Communications

Traffic-Aware Network Planning and Green Operation with BS Sleeping and Cell Zooming

Shan ZHANG, Yiqun WU, Sheng ZHOU, Zhisheng NIU

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Summary :

The traffic load of cellular networks varies in both time and spatial domains, causing many base stations (BS) to be under-utilized. Assisted by cell zooming, dynamic BS sleep control is considered as an effective way to improve energy efficiency during low traffic hours. Therefore, how densely the BSs should be deployed with cell zooming and BS sleeping is an important issue. In this paper, we explore the energy-optimal cellular network planning problem with dynamic BS sleeping and cell zooming for the cases in which traffic is uniformly distributed in space but time-varying. To guarantee the quality of multi-class services, an approximation method based on Erlang formula is proposed. Extensive simulations under our predefined scenarios show that about half of energy consumption can be saved through dynamic BS sleeping and power control. Surprisingly, the energy-optimal BS density we obtained is larger than the one without considering BS sleeping. In other words, deploying more BSs may help to save energy if dynamic BS sleeping is executed.

Publication
IEICE TRANSACTIONS on Communications Vol.E97-B No.11 pp.2337-2346
Publication Date
2014/11/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E97.B.2337
Type of Manuscript
PAPER
Category
Network

Authors

Shan ZHANG
  Tsinghua University
Yiqun WU
  Huawei Technologies R&D
Sheng ZHOU
  Tsinghua University
Zhisheng NIU
  Tsinghua University

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