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dc.creatorZhang, Fan
dc.creatorJing, Tao
dc.creatorHuo, Yan
dc.creatorMa, Liran
dc.date.accessioned2019-07-12T16:01:51Z
dc.date.available2019-07-12T16:01:51Z
dc.date.issued2018-01-01
dc.identifier.urihttps://doi.org/10.1016/j.procs.2018.03.034
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/26410
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S1877050918302539
dc.description.abstractIn this paper, we introduce energy harvesting into a cognitive radio sensor network to power the network with renewable energy sources so as to achieve self-sustainability of energy-limited sensors. In our work, the cognitive radio technology enable sensors access to the underutilized spectrum for the purpose of coping with the spectrum-scarcity problem in the unlicensed band. Using centralized cooperative spectrum sensing, a set of cognitive sensors is chosen from candidate sensors with different received primary users' signal powers and energy-arrival rates. After detecting the state of a primary channel, we also need to determine which cognitive sensor can get to access the primary channel as well as the power level to be used upon the transmission. The above sensing-access design problem is formulated as an infinite-horizon partially observable Markov decision process, in which the primary goal is to maximize the long-term expected throughput. Through using a value iteration approach, we propose an optimal sensing-access policy. At last, numerical results are presented to verify the superiority of our proposed policy to the existing policy.en_US
dc.language.isoenen_US
dc.publisherElsevier
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceProcedia Computer Science
dc.subjectEnergy harvestingen_US
dc.subjectcognitive radio sensor networksen_US
dc.subjectcooperative sensingen_US
dc.subjectpartially observable Markoven_US
dc.subjectdecision processen_US
dc.titleOptimal Spectrum Sensing-Access Policy in Energy Harvesting Cognitive Radio Sensor Networksen_US
dc.typeArticleen_US
dc.rights.holder2018 Elsevier
dc.rights.licenseCC BY-NC-ND 4.0
local.collegeCollege of Science and Engineering
local.departmentComputer Science
local.personsMa (COSC)


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