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http://dx.doi.org/10.7840/kics.2013.38B.8.679

Enhancing IEEE 802.11 Power Saving Mechanism (PSM) with a Time Slotted Scheme  

Lei, Xiaoying (광운대학교 전자융합공학과 무선네트워크 연구실)
Rhee, Seung Hyong (광운대학교 전자융합공학과 무선네트워크 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38B, no.8, 2013 , pp. 679-686 More about this Journal
Abstract
Power efficiency becomes more important in wireless LANs as the mobile stations send more data with limited batteries. It has been known that the IEEE 802.11 PSM is not efficient in high load networks: AP cannot deliver buffered packets to a PS station immediately and it can lead the station to stay in active state quite long and result in energy waste. Moreover, it is inefficient that only one data frame is retrieved by a PS-POLL frame. In this paper, we propose a time slotted scheme to enhance the PSM, in which a mobile station can reserve time slots to receive data frames. Our mechanism can reduce collisions by reservation and decrease the channel occupancy by transmitting multiple data frames via one PS-POLL. The analytic model and simulation results show that proposed scheme reduces power consumption significantly and enhances the performance of PSM.
Keywords
Power Saving Mechanism; IEEE 802.11; Infrastructure WLANs;
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