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research article

Insomnia in the Access or How to Curb Access Network Related Energy Consumption

Goma, Eduard
•
Canini, Marco  
•
Toledo, Alberto Lopez
Show more
2011
Computer Communication Review

Access networks include modems, home gateways, and DSL Access Multiplexers (DSLAMs), and are responsible for 70-80% of total network-based energy consumption. In this paper, we take an in-depth look at the problem of greening access networks, identify root problems, and propose practical solutions for their user-and ISP-parts. On the user side, the combination of continuous light traffic and lack of alternative paths condemns gateways to being powered most of the time despite having Sleep-on-Idle (SoI) capabilities. To address this, we introduce Broadband Hitch-Hiking (BH2), that takes advantage of the overlap of wireless networks to aggregate user traffic in as few gateways as possible. In current urban settings BH2 can power off 65-90% of gateways. Powering off gateways permits the remaining ones to synchronize at higher speeds due to reduced crosstalk from having fewer active lines. Our tests reveal speedup up to 25%. On the ISP side, we propose introducing simple inexpensive switches at the distribution frame for batching active lines to a subset of cards letting the remaining ones sleep. Overall, our results show an 80% energy savings margin in access networks. The combination of BH2 and switching gets close to this margin, saving 66% on average.

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Type
research article
DOI
10.1145/2043164.2018475
Web of Science ID

WOS:000302124800029

Author(s)
Goma, Eduard
Canini, Marco  
Toledo, Alberto Lopez
Laoutaris, Nikolaos
Kostic, Dejan  
Rodriguez, Pablo
Stanojevic, Rade
Valentin, Pablo Yaguee
Date Issued

2011

Publisher

Association for Computing Machinery

Published in
Computer Communication Review
Volume

41

Start page

338

End page

349

Subjects

Design

•

Experimentation

•

Measurement

•

Energy

•

Broadband access networks

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
NSL  
Available on Infoscience
June 25, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/82103
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