Insomnia in the Access (or How to Curb Access Network Related Energy Consumption)
2011 (English)In: Proceedings of the ACM SIGCOMM 2011 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communications, Association for Computing Machinery (ACM), 2011, -349 p.Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2011. -349 p.
IdentifiersURN: urn:nbn:se:kth:diva-147101DOI: 10.1145/2018436.2018475ScopusID: 2-s2.0-80053139618ISBN: 978-1-4503-0797-0OAI: oai:DiVA.org:kth-147101DiVA: diva2:727672
The ACM SIGCOMM 2011 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communications, Toronto, ON, Canada, August 15-19, 2011
QC 201407042014-06-232014-06-232014-07-04Bibliographically approved