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Conflict-free Opportunistic Centralized Time Slot Assignment in Cognitive Radio Sensor Networks

Ons Mabrouk 1 Pascale Minet 2 Hanen Idoudi 1 Leila Azouz Saidane 1
1 CRISTAL - Centre de Recherche Réseau Image SysTème Architecture et MuLtimédia
2 HIPERCOM2 - High PERformance COMmunications
Inria Paris-Rocquencourt
Abstract : The unlicensed spectrum bands becomeovercrowded causing an increased level of interference forcurrent wireless sensor nodes. Cognitive Radio Sensor Networks(CRSNs) overcome this problem by allowing sensor nodes toaccess opportunistically the underutilized licensed spectrumbands. The sink assigns the spectrum holes to the secondaryusers (SUs). Therefore, it must rely on reliable information aboutthe spectrum holes to protect the primary users (PUs). In thispaper the sink uses two ways to determine the available channelsand alerts the SUs if an unexpected activity of PU occurs. Ourobjective is to design an algorithm able to detect the unexpectedpresence of PUs in the multi-hop network while maximizingthe throughput. To achieve our goal, we propose an optimizedversion of our previous scheduling algorithm Opportunisticcentralized TIme slot assignment in COgnitive Radio sensornetworks (OTICOR). We then evaluate its performance in termsof number of slots and throughput.
Keywords : primary users cognitive radio sensor networks white space database spectrum sensing secondary users data gathering conflict-free schedule throughput
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Conference papers
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https://hal.inria.fr/hal-01094478
Contributor : Pascale Minet <>
Submitted on : Friday, December 12, 2014 - 1:12:46 PM
Last modification on : Wednesday, October 28, 2020 - 12:48:02 PM

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Ons Mabrouk, Pascale Minet, Hanen Idoudi, Leila Azouz Saidane. Conflict-free Opportunistic Centralized Time Slot Assignment in Cognitive Radio Sensor Networks. HPCC 2014 - 16th IEEE International Conference on High Performance and Communications, IEEE, Aug 2014, Paris, France. ⟨hal-01094478⟩

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