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Insomnia in the Access or How to Curb Access Network Related Energy Consumption
| Content Provider | CiteSeerX |
|---|---|
| Author | Rodriguez, Pablo Valentín, Pablo Yagüe |
| 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 practi-cal solutions for their user- and ISP-parts. On the user side, the combination of continuous light traffic and lack of alter-native 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 gate-ways. 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 inex-pensive 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. |
| File Format | |
| Access Restriction | Open |
| Content Type | Text |
