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

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Insomnia_in_the_Access_-_2011_EN.pdf (585.0Kb)
Identifiers
URI: http://hdl.handle.net/20.500.12761/28
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Author(s)
Goma, Eduard; Canini, Marco; López-Toledo, Alberto; Laoutaris, Nikolaos; Kostic, Dejan; Rodríguez, Pablo; Yagüe Valentín, Pablo; Stanojevic, Rade
Date
2011-08-15
Abstract
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.
Subject
Q Science::Q Science (General)
Q Science::QA Mathematics::QA75 Electronic computers. Computer science
T Technology::T Technology (General)
T Technology::TA Engineering (General). Civil engineering (General)
T Technology::TK Electrical engineering. Electronics Nuclear engineering
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Files
Insomnia_in_the_Access_-_2011_EN.pdf (585.0Kb)
Identifiers
URI: http://hdl.handle.net/20.500.12761/28
Metadata
Show full item record

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