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dc.contributor.authorTalat, Samer T.en_US
dc.contributor.authorWang, Chung-Weien_US
dc.contributor.authorWang, Li-Chunen_US
dc.date.accessioned2017-04-21T06:49:09Z-
dc.date.available2017-04-21T06:49:09Z-
dc.date.issued2016en_US
dc.identifier.isbn978-1-4673-9814-5en_US
dc.identifier.issn1525-3511en_US
dc.identifier.urihttp://hdl.handle.net/11536/136422-
dc.description.abstractCognitive radio (CR) systems can enhance the licensed spectrum efficiency by finding and allocating the under-utilized channels of the primary users to the secondary users. After scanning a wide range of spectrum. A general CR system needs to utilize all the available channels of various bandwidths. Whenever the active primary users appear, the secondary users shall return the borrowed channels, causing interruption even during a transmission period. The behavior of changing the operating channels is called hopping mode in this paper. In this paper we propose an improved preemptive resume priority (PRP) M/G/1 queueing network model for such a general CR system, aiming to characterize the impacts of hopping-mode behaviors and various bandwidth on the delay performance of the secondary users. We further propose a probability-based various-bandwidth channel selection scheme to reduce the overall system time for the hopping-mode secondary users with multiple interruptions, where the overall system time is defined as the sum of transmission time and waiting time. Our analytical results, validated by simulations, show that the proposed probability-based various-bandwidth channel selection scheme can improve the overall system time by 20% compared to the existing methods.en_US
dc.language.isoen_USen_US
dc.subjectCognitive radioen_US
dc.subjectspectrum decisionen_US
dc.subjectchannel selectionen_US
dc.subjectoverall system timeen_US
dc.subjectqueueing theoryen_US
dc.titleSpectrum Decision for Cognitive Radio Networks With Various-Bandwidth Channelsen_US
dc.typeProceedings Paperen_US
dc.identifier.journal2016 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCEen_US
dc.contributor.department電機工程學系zh_TW
dc.contributor.departmentDepartment of Electrical and Computer Engineeringen_US
dc.identifier.wosnumberWOS:000388603101003en_US
dc.citation.woscount0en_US
Appears in Collections:Conferences Paper