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dc.creatorZhang, Fan
dc.creatorJing, Tao
dc.creatorHuo, Yan
dc.creatorMa, Liran
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.
dc.sourceProcedia Computer Science
dc.subjectEnergy harvesting
dc.subjectcognitive radio sensor networks
dc.subjectcooperative sensing
dc.subjectpartially observable Markov
dc.subjectdecision process
dc.titleOptimal Spectrum Sensing-Access Policy in Energy Harvesting Cognitive Radio Sensor Networks
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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