Scheduling for next generation WLANs: filling the gap between offered and observed data rates

Çiftçioğlu, Ertuğrul Necdet and Gürbüz, Özgür (2011) Scheduling for next generation WLANs: filling the gap between offered and observed data rates. Wireless Communications and Mobile Computing (Special Issue: Wireless Mesh and Other Emerging Wireless Network Technologies), 11 (5). pp. 654-666. ISSN 1530-8669

This is the latest version of this item.

[thumbnail of Wiley_WCMC_EN_Ciftcioglu_O_Gurbuz2.doc] MS Word
Wiley_WCMC_EN_Ciftcioglu_O_Gurbuz2.doc
Restricted to Repository staff only

Download (349kB) | Request a copy
[thumbnail of wcmc_final.pdf] PDF
wcmc_final.pdf

Download (480kB)

Abstract

In wireless networks, opportunistic scheduling is used to increase system throughput by exploiting multi-user diversity. Although recent advances have increased physical layer data rates supported in wireless local area networks (WLANs), actual throughput realized are significantly lower due to overhead. Accordingly, the frame aggregation concept is used in next generation WLANs to improve efficiency. However, with frame aggregation, traditional opportunistic schemes are no longer optimal. In this paper, we propose schedulers that take queue and channel conditions into account jointly, to maximize throughput observed at the users for next generation WLANs. We also extend this work to design two schedulers that perform block scheduling for maximizing network throughput over multiple transmission sequences. For these schedulers, which make decisions over long time durations, we model the system using queueing theory and determine users' temporal access proportions according to this model. Through detailed simulations, we show that all our proposed algorithms offer significant throughput improvement, better fairness, and much lower delay compared with traditional opportunistic schedulers, facilitating the practical use of the evolving standard for next generation wireless networks.
Item Type: Article
Uncontrolled Keywords: opportunistic scheduling • resource allocation • wireless LANs • multi-user diversity • wireless MAC • queueing theory
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1-4661 Electrical engineering. Electronics Nuclear engineering
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Telecommunications
Faculty of Engineering and Natural Sciences > Academic programs > Computer Science & Eng.
Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: Özgür Gürbüz
Date Deposited: 01 Oct 2009 11:07
Last Modified: 26 Apr 2022 08:29
URI: https://research.sabanciuniv.edu/id/eprint/12070

Available Versions of this Item

Actions (login required)

View Item
View Item