Chen, Xiaomin and Subramanian, Vijay G. and Leith, Douglas J. (2013) PHY modulation/rate control for fountain codes in 802.11a/g WLANs. Physical Communication, 9. pp. 135-144. ISSN 1874-4907

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Abstract

In this paper we consider the joint performance of fountain codes and 802.11a/g PHY modulation/coding. We consider optimality both in terms of maximizing goodput and minimizing energy, and results are presented for both theoretical and experimental channel models. In contrast to studies in cellular networks, we find that in 802.11a/g WLANs the cross-layer approach of a higher-layer fountain coding with a PHY layer modulation and FEC coding can yield very limited gains, and the PHY modulation/rate that optimizes the uncoded multicast performance is also close to that for fountain-coded multicast traffic over a wide-range of network conditions. This is potentially an important observation as it indicates that in 802.11a/g WLANs cross-layer design for multicast rate control would bring few benefits and PHY layer rate control can be carried out without regard to the use of fountain coding at higher layers.

Item Type:	Article
Additional Information:	The definitive published version of this article is available at DOI: 10.1016/j.phycom.2012.12.003
Keywords:	802.11a/g WLANs; Fountain codes; Multicast; PHY rate control;
Academic Unit:	Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	6967
Identification Number:	https://doi.org/10.1016/j.phycom.2012.12.003
Depositing User:	Hamilton Editor
Date Deposited:	09 Feb 2016 12:25
Journal or Publication Title:	Physical Communication
Publisher:	Elsevier
Refereed:	Yes
Funders:	Science Foundation Ireland (SFI)
URI:	http://www.sciencedirect.com/
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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