NDLI: Hyperexponential approximation of channel idle time distribution with implication to secondary transmission strategy

Content Provider	IEEE Xplore Digital Library
Author	Yingxi Liu Tewfik, A.
Copyright Year	2012
Description	Author affiliation: Dept. of Electrical and Computer Engineering, The University of Texas at Austin (Yingxi Liu; Tewfik, A.)
Abstract	Channel idle time distribution (CITD) based secondary transmission strategies have been studied intensively in the literature. The performance of secondary devices are limited by the presumed CITD. But none of them provides a reasonable characterization of the CITD in reality. In this paper, we carefully examine the feature of the CITD using large amount of channel idle time data collected in various WLAN networks. It is demonstrated that the CITD can be well approximated by hyperexponential densities. Based on the estimated density, we propose a novel multiple-shot transmission strategy which takes advantage of the hyperexponential feature of the CITD. This strategy achieves at least twice the increase for the data we examine in average secondary access time compared to conventional transmission strategies.
Starting Page	1800
Ending Page	1804
File Size	394488
Page Count	5
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6363720
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Approximation methods Cognitive radio Wireless LAN Approximation algorithms Estimation multiple exponentials cognitive radio dynamic spectrum access (DSA) channel idle time distribution (CITD)
Content Type	Text
Resource Type	Article

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