Enhanced primary and secondary performance through cognitive relaying and leveraging primary feedback

Handle URI:
http://hdl.handle.net/10754/563577
Title:
Enhanced primary and secondary performance through cognitive relaying and leveraging primary feedback
Authors:
Hamza, Doha R.; Aïssa, Sonia
Abstract:
We consider a spectrum-sharing system, where the primary terminal operates in a time-slotted fashion and is active only when it has a packet to send. The secondary terminal uses spectrum sensing results and the primary automatic repeat request (ARQ) feedback to access the channel probabilistically. To enhance the primary's system performance, the secondary user (SU) acts as a relay for the primary user (PU) in the event of transmission failure on the direct link of the latter. Closed-form expressions for the primary and secondary throughputs are obtained for the described scheme. The optimal medium access probabilities are then obtained by maximizing the secondary throughput subject to constraints that guarantee the stability of the considered queues, a minimum primary throughput, and a maximum primary queueing delay. The results clearly indicate the benefits of cognitive relaying in enhancing the throughput performance for both the PU and SU. Furthermore, by guaranteeing minimum rate and maximum delay requirements, our scheme is shown to provide a definitive notion of protection for the licensed users of the network. © 2013 IEEE.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Vehicular Technology
Issue Date:
Jun-2014
DOI:
10.1109/TVT.2013.2292532
Type:
Article
ISSN:
00189545
Appears in Collections:
Articles; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHamza, Doha R.en
dc.contributor.authorAïssa, Soniaen
dc.date.accessioned2015-08-03T11:54:51Zen
dc.date.available2015-08-03T11:54:51Zen
dc.date.issued2014-06en
dc.identifier.issn00189545en
dc.identifier.doi10.1109/TVT.2013.2292532en
dc.identifier.urihttp://hdl.handle.net/10754/563577en
dc.description.abstractWe consider a spectrum-sharing system, where the primary terminal operates in a time-slotted fashion and is active only when it has a packet to send. The secondary terminal uses spectrum sensing results and the primary automatic repeat request (ARQ) feedback to access the channel probabilistically. To enhance the primary's system performance, the secondary user (SU) acts as a relay for the primary user (PU) in the event of transmission failure on the direct link of the latter. Closed-form expressions for the primary and secondary throughputs are obtained for the described scheme. The optimal medium access probabilities are then obtained by maximizing the secondary throughput subject to constraints that guarantee the stability of the considered queues, a minimum primary throughput, and a maximum primary queueing delay. The results clearly indicate the benefits of cognitive relaying in enhancing the throughput performance for both the PU and SU. Furthermore, by guaranteeing minimum rate and maximum delay requirements, our scheme is shown to provide a definitive notion of protection for the licensed users of the network. © 2013 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectAutomatic repeat request (ARQ) feedbacken
dc.subjectcognitive radio (CR)en
dc.subjectcognitive relayingen
dc.subjectdelay analysisen
dc.subjectMarkov chainsen
dc.subjectspectrum sensingen
dc.titleEnhanced primary and secondary performance through cognitive relaying and leveraging primary feedbacken
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.identifier.journalIEEE Transactions on Vehicular Technologyen
dc.contributor.institutionNational Institute of Scientific Research-Energy, Materials and Telecommunications (INRS-EMT), University of Quebec, Montreal, QC H3C 3P8, Canadaen
kaust.authorHamza, Doha R.en
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