Please use this identifier to cite or link to this item: https://doi.org/10.1109/TCOMM.2013.050813.120877
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dc.titleOn design of opportunistic spectrum access in the presence of reactive primary users
dc.contributor.authorChe, Y.L.
dc.contributor.authorZhang, R.
dc.contributor.authorGong, Y.
dc.date.accessioned2014-10-07T04:33:45Z
dc.date.available2014-10-07T04:33:45Z
dc.date.issued2013
dc.identifier.citationChe, Y.L., Zhang, R., Gong, Y. (2013). On design of opportunistic spectrum access in the presence of reactive primary users. IEEE Transactions on Communications 61 (7) : 2678-2691. ScholarBank@NUS Repository. https://doi.org/10.1109/TCOMM.2013.050813.120877
dc.identifier.issn00906778
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/82808
dc.description.abstractOpportunistic spectrum access (OSA) is a key technique enabling the secondary users (SUs) in a cognitive radio (CR) network to transmit over the «spectrum holes» unoccupied by the primary users (PUs). In this paper, we focus on the OSA design in the presence of reactive PUs, where PU's access probability in a given channel is related to SU's past access decisions. We model the channel occupancy of the reactive PU as a 4-state discrete-time Markov chain. We formulate the optimal OSA design for SU throughput maximization as a constrained finite-horizon partially observable Markov decision process (POMDP) problem. We solve this problem by first considering the conventional short-term conditional collision probability (SCCP) constraint. We then adopt a long-term PU throughput (LPUT) constraint to effectively protect the reactive PU transmission. We derive the structure of the optimal OSA policy under the LPUT constraint and propose a suboptimal policy with lower complexity. Numerical results are provided to validate the proposed studies, which reveal some interesting new tradeoffs between SU throughput maximization and PU transmission protection in a practical interaction scenario. © 1972-2012 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/TCOMM.2013.050813.120877
dc.sourceScopus
dc.subjectCognitive radio
dc.subjectDynamic programming
dc.subjectOpportunistic spectrum access
dc.subjectPartially observable Markov decision process (POMDP)
dc.subjectReactive primary user
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/TCOMM.2013.050813.120877
dc.description.sourcetitleIEEE Transactions on Communications
dc.description.volume61
dc.description.issue7
dc.description.page2678-2691
dc.description.codenIECMB
dc.identifier.isiut000322451800008
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