Performance analysis of periodical spectrum sensing for dynamic spectrum access networks

Conference paper (2005)

Authors

Przemysław Pawełczak International Research Centre for Telecommunication and Radar
Ranga Rao Venkatesha Prasad International Research Centre for Telecommunication and Radar
H. Nikookar Microwave Technology and Systems for Radar
I.G.M.M. Niemegeers Wireless and Mobile Communications
Research Group
International Research Centre for Telecommunication and Radar
More Info
expand_more

Published Date

2005

Language

Undefined/Unknown

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Research Group

International Research Centre for Telecommunication and Radar

Abstract

In Dynamic Spectrum Access Networks, detection of spectral opportunity can be viewed as a frequency scanning process leading to detection of legitimate users of radio channel. Continuous scanning results in complete detection but it becomes inefficient in terms of power consumption at each mobile node. This is more profound whem some frequency bands are rarely used by legitmate users. Therefore, it is necessary to study the scanning process which is periodically switched off according to some distribution to reduce power consumption. We analytically show that with the increasing number of scanning nodes thier average scanning-on time decrease while the efficiency approaches to the one node case. Based on the results we propose a scanning scheme for single and multiple node cases, that dynamically assign average scanning-on time to nodes when the number of nodes in the network is varying with time. At the scanning-off instance, depending on whether we allow transmission or not, we come across two cases which we also analyze: interfering and non-intefering.