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dc.contributor.authorLee, Chang-Shenen_US
dc.contributor.authorChung, Wei-Hoen_US
dc.contributor.authorLee, Ta-Sungen_US
dc.date.accessioned2017-04-21T06:49:02Z-
dc.date.available2017-04-21T06:49:02Z-
dc.date.issued2015en_US
dc.identifier.isbn978-1-4799-8406-0en_US
dc.identifier.issn1525-3511en_US
dc.identifier.urihttp://hdl.handle.net/11536/135926-
dc.description.abstractIn this paper, the distributed channel access schemes for ALOHA-based cognitive radio networks are considered. In the considered system, time is divided into frames, which are further divided into sensing phase and transmission phase. We derive channel sensing policy in the sensing phase, and channel access policy in the transmission phase for a secondary user (SU) to maximize its throughput. To mitigate high complexities of the above scheme, we propose a threshold-based channel access scheme. In this scheme, an appropriate threshold is set based on channel occupancy information and channel state information, and only channels providing potentially high throughput will be sensed and accessed. The proposed schemes are fully distributed, i.e., no extra information exchange is needed among SUs, which is a highly desired and beneficial property. Simulation results confirm that the proposed schemes outperform prior random access schemes.en_US
dc.language.isoen_USen_US
dc.subjectCognitive radioen_US
dc.subjectopportunistic spectrum accessen_US
dc.subjectthroughput maximizationen_US
dc.titleDistributed Channel Access Schemes for Multi-Channel ALOHA Cognitive Radio Networksen_US
dc.typeProceedings Paperen_US
dc.identifier.journal2015 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)en_US
dc.citation.spage1124en_US
dc.citation.epage1128en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:000380909600193en_US
dc.citation.woscount0en_US
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