Knowledge Management Framework for Robust Cognitive Radio Operation in Non-Stationary Environments

Faouzi Bouali, Oriol Sallent, Jordi Pérez-Romero

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Abstract

To increase cognitive radio operation efficiency, this paper proposes a new knowledge management functional architecture, based on the fittingness factor concept, for supporting spectrum management in non-stationary environments. It includes a reliability tester module that detects, based on hypothesis testing, relevant changes in suitability levels of spectrum resources to support a set of heterogeneous applications. These changes are captured through a set of advanced statistics stored in a knowledge database and exploited by a proactive spectrum management strategy to assist both spectrum selection and spectrum mobility functionalities. The results reveal that the proposed reliability tester is able to disregard the changes due to the intrinsic randomness of the radio environment and to efficiently detect actual changes in interference conditions of spectrum pools. Thanks to this support, the proposed spectrum management strategy exhibits substantial robustness when the environment becomes non-stationary, obtaining performance improvements of up to 75% with respect to the reference case that does not make use of the reliability tester functionality.
Original languageEnglish
Title of host publication IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
PublisherIEEE
Pages3022-3027
Number of pages6
ISBN (Electronic)978-1-4673-6235-1
DOIs
Publication statusPublished - 11 Dec 2013
Externally publishedYes
Event24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) - London, United Kingdom
Duration: 8 Sep 201313 Sep 2013

Conference

Conference24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
CountryUnited Kingdom
CityLondon
Period8/09/1313/09/13

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