Flexible Spectrum Access for Opportunistic Secondary Operation in Cognitive Radio Networks

Author

Gelabert, Xavier ; Sallent, Oriol ; Pérez-Romero, Jordi ; Agustí, Ramon

Author_Institution

Dept. of Signal Theor. & Commun. (TSC), Univ. Politec. de Catalunya (UPC), Barcelona, Spain

Volume

59

Issue

10

fYear

2011

fDate

10/1/2011 12:00:00 AM

Firstpage

2659

Lastpage

2664

Abstract

In this letter a Discrete-Time Markov Chain (DTMC) framework is adopted to capture the effect of flexible spectrum channelization for the opportunistic access of secondary users (SUs) in a primary-secondary shared spectrum scenario. Two implementation alternatives are proposed: a fixed channelization scheme (FCS) and an adaptive channelization scheme (ACS). Moreover, service-type characterization of SUs is also addressed by defining time vs. volume based services. Results indicate the suitability of the ACS over the FCS.

Keywords

Markov processes; cognitive radio; adaptive channelization scheme; cognitive radio networks; discrete-time Markov chain framework; fixed channelization scheme; flexible spectrum access; flexible spectrum channelization; opportunistic access; opportunistic secondary operation; primary-secondary shared spectrum scenario; secondary users; service-type characterization; Adaptation models; Bandwidth; Markov processes; Measurement; Sensors; Throughput; Tin; Cognitive radio; discrete time Markov chains; dynamic spectrum access; performance evaluation;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2011.071111.110024

Filename

5958750