NDLI: Energy-optimal scheduling with dynamic channel acquisition in wireless downlinks

Content Provider	IEEE Xplore Digital Library
Author	Chih-ping Li Neely, M.J.
Copyright Year	2007
Description	Author affiliation: Univ. of Southern California, Los Angeles (Chih-ping Li; Neely, M.J.)
Abstract	We consider a wireless base station serving L users through L time-varying channels. It is well known that opportunistic scheduling algorithms with full channel state information (CSI) can stabilize the system and achieve the full capacity region. However, opportunistic scheduling algorithms with full CSI may not be energy efficient when the cost of channel acquisition is high and traffic rates are low. In particular, under the low traffic rate regime, it may be sufficient and more energy-efficient to transmit data with no CSI, i.e., to transmit data blindly, since no power for channel acquisition is consumed. In general, we show that purely channel-aware or purely channel-blind strategies are not necessarily optimal, and we must consider mixed strategies. We derive a unified scheduling algorithm that dynamically chooses to transmit data with full or no CSI based on queue backlog and channel statistics. Through Lyapunov analysis, we show that the unified algorithm can stabilize the downlink with optimal power consumption.
Starting Page	1140
Ending Page	1147
File Size	318826
Page Count	8
File Format	PDF
ISBN	9781424414970
ISSN	01912216
DOI	10.1109/CDC.2007.4434517
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-12-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dynamic scheduling Downlink Scheduling algorithm Energy efficiency Traffic control Base stations Time-varying channels Channel state information Costs Statistics
Content Type	Text
Resource Type	Article

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