Proactive Frequency-Hopping Dynamic Spectrum Access Against Asynchronous Interchannel Spectrum Sensing

Title
Proactive Frequency-Hopping Dynamic Spectrum Access Against Asynchronous Interchannel Spectrum Sensing
Authors
김재명
Keywords
Asynchronous interchannel spectrum sensing, cognitive radio (CR), dynamic spectrum access (DSA), proactive frequency hopping (FH)
Issue Date
2013
Publisher
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Series/Report no.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY ; Vol62 no.8 Startpage 3614 Endpage 3626
Abstract
In the frequency-hopping-based dynamic spectrum access (FH-DSA) methods, both reactive and proactive channel switching (CS) schemes are widely adopted. However, when they are coupled with asynchronous interchannel spectrum sensing (moments), there are at least two drawbacks in these CS schemes, i.e., producing more interference to a primary user (PU) and fewer throughputs to a secondary user (SU). Therefore, to overcome these two drawbacks, we propose a proactive FH-DSA method against asynchronous interchannel spectrum sensing with reduced interference to the PU, while enhancing the SU throughput by eliminating the spectrum sensing time overhead during CS. The optimal FH policy is obtained by formulating proactive FH-DSA in the dynamic programming framework. Furthermore, we derive the theoretical average interference and the bound of average delay under the proposed FH-DSA. Based on them, while considering the tradeoff between exploration and exploitation, and the practical requirements for interference and throughput, we propose one extension which proactively takes FH subject to an interference constraint to further reduce interference. The complexity of the proposed schemes is also analyzed. Finally, simulation results show the performance improvement of the proposed schemes.
URI
http://dspace.inha.ac.kr/handle/10505/33467
ISSN
0018-9545
Appears in Collections:
College of Engineering(공과대학) > Information and Communication Engineering (정보통신공학) > Journal Papers, Reports(정보통신공학 논문, 보고서)
Files in This Item:
35612.pdfDownload

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse