Cognitive radio network architecture: part I - general structure

  title={Cognitive radio network architecture: part I - general structure},
  author={Kwang-Cheng Chen and Yu-Jeng Peng and Neeli R. Prasad and Ying-Chang Liang and Sumei Sun},
Cognitive radio has been considered as a key technology for future wireless communications and mobile computing. We note the cognitive radios can form cognitive radio networks (CRN) by extending the radio link features to network layer functions and above. We categorize CRN architecture into several structures and classify the unidirectional links in such structures, to pave the way for future systematic CRN research. 
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