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Radio Resource Tomography of Cognitive Radio Networks
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009Cognitive radio (CR) is promising toward future wireless communication. By incorporating co-existing primary system(s) and CRs into a cognitive radio network (CRN), it is possible to significantly enhance overall spectrum efficiency, provided that CRs can precisely explore appropriate spectrum and network activities, which we call CRN tomography by ...
Chung-Kai Yu, Kwang-Cheng Chen
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A Survey on Cognitive Radio Networks
2010The limitation of the spectrum bands is a major bottleneck for the development of next generation wireless networks. Cognitive Radio (CR) aims at improving the spectrum utilization by taking advantage of licensed but currently unused spectrum. CR has broad applications including dynamic spectrum access and interference management, which will largely ...
Jingfang Huang +2 more
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The security in cognitive radio networks
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly, 2009Recent developments of wireless communication lead to the problem of growing spectrum shortage. Cognitive radio, as a novel technology, tends to solve this problem by dynamically utilizing the spectrum. Security in cognitive radio network becomes a challenging issue, since more chances are given to attackers by cognitive radio technology compared to ...
Xueying Zhang, Cheng Li 0005
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On the Route Priority for Cognitive Radio Networks
IEEE Transactions on Communications, 2015To fully unleash the potentials of the cognitive radio (CR) paradigm, new challenges must be addressed. Specifically, as regards the network layer, the problem of the route priority , i.e., the problem of prioritizing the routes for the CR packet transmission, is crucial, since the communication opportunities provided by a route are deeply affected
CACCIAPUOTI, ANGELA SARA +3 more
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Spectrum Management in Cognitive Radio Networks
2008 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications, 2008Today’s wireless networks are characterized by a fixed spectrum assignment policy. However, a large portion of the assigned spectrum is used sporadically and geographical variations in the utilization of assigned spectrum ranges from 15% to 85% with a high variance in time.
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Oblivious Rendezvous in Cognitive Radio Networks
2014Rendezvous is a fundamental process in the operation of a Cognitive Radio Network (CRN), through which a secondary user can establish a link to communicate with its neighbors on the same frequency band (channel). The licensed spectrum is divided into N non-overlapping channels, and most previous works assume all users have the same label for the same ...
Hua, QS, Lau, FCM, Wang, Y, Gu, ZQ
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2019
The radio spectrum is witnessing a major paradigm shift from fixed spectrum assignment policy to the dynamic spectrum access, which will completely change the way radio spectrum is managed. This step is required to greatly reduce the load on limited spectrum resources, which is being enforced by the exponential growth of wireless services. This is only
Nitin Gupta +2 more
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The radio spectrum is witnessing a major paradigm shift from fixed spectrum assignment policy to the dynamic spectrum access, which will completely change the way radio spectrum is managed. This step is required to greatly reduce the load on limited spectrum resources, which is being enforced by the exponential growth of wireless services. This is only
Nitin Gupta +2 more
openaire +2 more sources
2016
The ever increasing demand for communication bandwidth has led to spectrum scarcity. We need to manage spectrum as a scare resource. Better utilization of spectrum is the key requirement for the radio communication systems. The inefficient usage of the existing spectrum can be improved through opportunistic access to the licensed bands without ...
Deepti Singhal +3 more
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The ever increasing demand for communication bandwidth has led to spectrum scarcity. We need to manage spectrum as a scare resource. Better utilization of spectrum is the key requirement for the radio communication systems. The inefficient usage of the existing spectrum can be improved through opportunistic access to the licensed bands without ...
Deepti Singhal +3 more
openaire +2 more sources
2017
A cognitive radio can be defined by the capability of being aware of its environment and the internal state and, based on the knowledge of these elements and any stored pre-defined objectives, can dynamically adapt, make, and implement decisions about its behavior.
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A cognitive radio can be defined by the capability of being aware of its environment and the internal state and, based on the knowledge of these elements and any stored pre-defined objectives, can dynamically adapt, make, and implement decisions about its behavior.
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Routing Metrics of Cognitive Radio Networks: A Survey
IEEE Communications Surveys and Tutorials, 2014Lin Chen +2 more
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