Conference Proceeding

Spectrum, network and operations management in cognitive radio networks

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA;
05/2008; DOI:10.1109/NOMS.2008.4575099 ISBN: 978-1-4244-2065-0 In proceeding of: Network Operations and Management Symposium, 2008. NOMS 2008. IEEE
Source: IEEE Xplore

ABSTRACT Today'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. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. This new networking paradigm is referred to as cognitive radio networks. In this talk, the novel functionalities and current research challenges of the cognitive radio networks are explained in detail. More specifically, an overview of the cognitive radio technology is provided and the network architecture is introduced. Moreover, the cognitive network functions such as spectrum management, spectrum mobility and spectrum sharing are explained in detail. The influence of these functions on the performance of the upper layer protocols such as routing and transport are investigated. Moreover, the network management, operation and maintenance problems are highlighted and open research issues in these areas are also outlined.

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Keywords

assigned spectrum
 
cognitive network functions
 
cognitive radio networks
 
cognitive radio technology
 
current research challenges
 
existing wireless spectrum opportunistically
 
fixed spectrum assignment policy
 
limited available spectrum
 
maintenance problems
 
network management
 
new communication paradigm
 
new networking paradigm
 
open research issues
 
spectrum management
 
spectrum mobility
 
spectrum ranges
 
spectrum sharing
 
spectrum usage
 
Today's wireless networks
 
upper layer protocols
 

I.F. Akyildiz