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

Sangheon Pack, Seongman Min, Taewon Song, Wonjung Kim, Nakjung Choi, Hyunhee Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)1767-1777
Number of pages11
JournalWireless Networks
Issue number6
Publication statusPublished - 2016 Aug 1

Bibliographical note

Funding Information:
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).

Publisher Copyright:
© 2015, Springer Science+Business Media New York.

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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