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RA-PSM: a rate-aware power saving mechanism in multi-rate wireless LANs

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Abstract

Improving energy efficiency is one of the most important issues in wireless local area networks (WLANs) and a power saving mechanism (PSM) has been proposed in IEEE 802.11 WLANs. However, the conventional PSMs do not consider multi-rate transmissions and thus the waiting time for retrieving buffered frames from the access point can be unnecessarily long and more energy can be consumed. In this paper, we propose a rate-aware power saving mechanism (RA-PSM) in multi-rate WLANs. In RA-PSM, a station sets its contention window size inversely proportional to the transmission rate and thus a station with higher transmission rate can request the buffered frames at the access point with higher priority. As a result, the overall channel waiting time can be reduced and the energy consumption can be saved accordingly. Analytical and simulation results demonstrate that RA-PSM can reduce the average channel waiting time and the energy consumption by up to 77 and 40.3 %, respectively, compared with the conventional IEEE 802.11 PSM.

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Acknowledgments

This research was supported in part by the MSIP (Ministry of Science, ICT&Future Planning), Korea, under the ITRC (Information Technology Research Center) support program (IITP-2015-H8501-15-1007) supervised by the IITP (Institute for Information & communications Technology Promotion) and in part by ICT R&D program of MSIP/IITP (2014-044-006-004, Next Generation WLAN System with High Efficient Performance).

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Authors and Affiliations

  1. School of Electrical Engineering, Korea University, Seoul, Korea

    Sangheon Pack, Seongman Min, Taewon Song & Wonjung Kim

  2. Alcatel-Lucent Bell-Labs Seoul, Seoul, Korea

    Nakjung Choi

  3. Telecom Bretagne, Rennes, France

    Hyunhee Park

Authors
  1. Sangheon Pack
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  2. Seongman Min
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  3. Taewon Song
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  4. Wonjung Kim
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  5. Nakjung Choi
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  6. Hyunhee Park
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Corresponding author

Correspondence to Sangheon Pack.

Additional information

A preliminary version of this paper was presented at IEEE Asia-Pacific Conference on Communications (APCC) 2012, Jeju, Korea, October 2012 [1].

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Pack, S., Min, S., Song, T. et al. RA-PSM: a rate-aware power saving mechanism in multi-rate wireless LANs. Wireless Netw 22, 1767–1777 (2016). https://doi.org/10.1007/s11276-015-1064-3

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  • DOI: https://doi.org/10.1007/s11276-015-1064-3

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