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dc.contributor.authorErcan, Ali Özer
dc.contributor.authorSunay, Mehmet Oğuz
dc.date.accessioned2015-11-19T14:24:22Z
dc.date.available2015-11-19T14:24:22Z
dc.date.issued2016-01
dc.identifier.issn1570-8705
dc.identifier.urihttp://hdl.handle.net/10679/1157
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S157087051500178X
dc.descriptionDue to copyright restrictions, the access to the full text of this article is only available via subscription.en_US
dc.description.abstractThis paper presents a new, joint Markov chain model for the primary and secondary traffic in a cognitive radio network to assess the feasibility of opportunistic spectrum access for different operational scenarios, validated by extensive realistic Monte-Carlo simulations. Enhancing on the current literature, the generalized model allows for the consideration of a retransmission-based traffic as well as the presence of transmission queues for the primary user. The generalized model also allows for the investigation of the system behavior in the presence of imperfect sensing at the secondary users. The presented model is applicable for all primary user traffic models that use discrete-time Markov chains. An infinitely backlogged secondary user network is considered to investigate the maximum possible network utilization. The paper concludes that a percentile channel occupation of the primary user on its own is not always a sufficient metric to assess whether secondary transmission is feasible. It is shown that the interplay between primary network traffic characteristics, as well as the sensing frequency and probabilities of missed detection and false alarm for the secondary network detector are of primal importance for such feasibility claims. The results reveal that the preferred sensing frequency for the secondary users is a function of the primary user traffic pattern and that the commonly used frequency of sensing every transmission slot is not always optimal. The results also show that when sensing frequency is low, secondary utilization decreases with more bursty primary traffic, whereas the impact on primary utilization becomes less.en_US
dc.description.sponsorshipTÜBİTAK
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relationinfo:turkey/grantAgreement/TUBITAK/114E739
dc.relation.ispartofAd Hoc Networks
dc.rightsrestrictedAccess
dc.titleOn the feasibility of synchronous, retransmission-based cognitive networksen_US
dc.typeArticleen_US
dc.peerreviewedyesen_US
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID(ORCID 0000-0003-1126-8259 & YÖK ID 35788) Ercan, Ali
dc.contributor.authorID(ORCID 0000-0002-7345-3129 & YÖK ID 41032) Sunay, Oğuz
dc.contributor.ozuauthorErcan, Ali Özer
dc.contributor.ozuauthorSunay, Mehmet Oğuz
dc.identifier.volume36
dc.identifier.issue1
dc.identifier.startpage398
dc.identifier.endpage406
dc.identifier.wosWOS:000366774700026
dc.identifier.doi10.1016/j.adhoc.2015.08.012
dc.subject.keywordsCognitive radioen_US
dc.subject.keywordsMultiaccess communicationen_US
dc.subject.keywordsOpportunistic multiple accessen_US
dc.identifier.scopusSCOPUS:2-s2.0-84948717037
dc.contributor.authorMale2


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