Results 271 to 280 of about 25,855 (301)
Some of the next articles are maybe not open access.
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.
openaire +1 more source
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
openaire +2 more sources
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
openaire +2 more sources
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
openaire +2 more sources
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.
openaire +2 more sources
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.
openaire +2 more sources
Routing Metrics of Cognitive Radio Networks: A Survey
IEEE Communications Surveys and Tutorials, 2014Moustafa Youssef +2 more
exaly
Learning and Reasoning in Cognitive Radio Networks
IEEE Communications Surveys and Tutorials, 2013Liljana Gavrilovska +2 more
exaly
Medium Access Control Protocols in Cognitive Radio Networks: Overview and General Classification
IEEE Communications Surveys and Tutorials, 2014Liljana Gavrilovska +2 more
exaly
Channel Assignment Algorithms in Cognitive Radio Networks: Taxonomy, Open Issues, and Challenges
IEEE Communications Surveys and Tutorials, 2016Abdullah Gani +2 more
exaly