TY - GEN
T1 - Insomnia in the access
T2 - ACM SIGCOMM 2011 Conference, SIGCOMM'11
AU - Goma, Eduard
AU - Canini, Marco
AU - Toledo, Alberto Lopez
AU - Laoutaris, Nikolaos
AU - Kostić, Dejan
AU - Rodriguez, Pablo
AU - Stanojević, Rade
AU - Valentín, Pablo Yagüe
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Broadband access networks
KW - Energy
UR - http://www.scopus.com/inward/record.url?scp=80053139618&partnerID=8YFLogxK
U2 - 10.1145/2018436.2018475
DO - 10.1145/2018436.2018475
M3 - Conference contribution
AN - SCOPUS:80053139618
SN - 9781450307970
T3 - Proceedings of the ACM SIGCOMM 2011 Conference, SIGCOMM'11
SP - 338
EP - 349
BT - Proceedings of the ACM SIGCOMM 2011 Conference, SIGCOMM'11
Y2 - 15 August 2011 through 19 August 2011
ER -
