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µNap: Practical micro-sleeps for 802.11 WLANs

Azcorra, Arturo and Ucar, Iñaki and Gringoli, Francesco and Banchs, Albert and Serrano, Pablo (2017) µNap: Practical micro-sleeps for 802.11 WLANs. [Journal Articles]

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Abstract

In this paper, we revisit the idea of putting interfaces to sleep during packet overhearing (i.e., when there are ongoing transmissions addressed to other stations) from a practical standpoint. To this aim, we perform a robust experimental characterisation of the timing and consumption behaviour of a commercial 802.11 card. We design μNap, a local standard-compliant energy-saving mechanism that leverages micro-sleep opportunities inherent to the CSMA operation of 802.11 WLANs. This mechanism is backwards compatible and incrementally deployable, and takes into account the timing limitations of existing hardware, as well as practical CSMA-related issues (e.g., capture effect). According to the performance assessment carried out through trace-based simulation, the use of our scheme would result in a 57% reduction in the time spent in overhearing, thus leading to an energy saving of 15.8% of the activity time.

Item Type: Journal Articles
Uncontrolled Keywords: Energy efficiency; Energy measurement; CSMA wireless networks.
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Rebeca De Miguel
Date Deposited: 03 Oct 2017 14:53
Last Modified: 04 Dec 2017 12:34
URI: http://eprints.networks.imdea.org/id/eprint/1697

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