IMDEA Networks Institute Publications Repository

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

Goma, Eduard and Canini, Marco and López-Toledo, Alberto and Laoutaris, Nikolaos and Kostic, Dejan and Rodríguez, Pablo and Yagüe Valentín, Pablo and Stanojevic, Rade (2011) Insomnia in the Access or How to Curb Access Network Related Energy Consumption. In: The 24th Annual Conference of the ACM Special Interest Group on Data Communication on the applications, technologies, architectures, and protocols for computer communication (ACM SIGCOMM 2011), 15-19 August 2011, Toronto, Ontario, Canada.

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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.

Item Type: Conference or Workshop Papers (Paper)
Uncontrolled Keywords: Computer-Communication Networks; Local and Wide-Area Networks—Access schemes;Computer-Communication Networks; Network Architecture and Design General Terms Design, Experimentation, Measurement,Energy, Broadband access networks
Subjects: 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
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Rebeca De Miguel
Date Deposited: 15 Feb 2012 13:53
Last Modified: 29 Nov 2018 11:48

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