NeXt generation/dynamic spectrum access/cognitive Radio Wireless Networks: A Survey

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NeXt generation/dynamic spectrum access/cognitive Radio Wireless Networks: A Survey (2006)

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by Ian F. Akyildiz , Won-Yeol Lee , Mehmet C. Vuran , Shantidev Mohanty

Venue:	COMPUTER NETWORKS JOURNAL (ELSEVIER
Citations:	742 - 15 self

BibTeX

@ARTICLE{Akyildiz06nextgeneration/dynamic,
    author = {Ian F. Akyildiz and Won-Yeol Lee and Mehmet C. Vuran and Shantidev Mohanty},
    title = {NeXt generation/dynamic spectrum access/cognitive Radio Wireless Networks: A Survey},
    journal = {COMPUTER NETWORKS JOURNAL (ELSEVIER},
    year = {2006},
    volume = {50},
    pages = {2127--2159}
}

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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 NeXt Generation (xG) Networks as well as Dynamic Spectrum Access (DSA) and cognitive radio networks. The term xG networks is used throughout the paper. The novel functionalities and current research challenges of the xG networks are explained in detail. More specifically, a brief overview of the cognitive radio technology is provided and the xG network architecture is introduced. Moreover, the xG 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 and open research issues in these areas are also outlined. Finally, the cross-layer design challenges in xG networks are discussed.

Keyphrases

assigned spectrum xg network next generation cognitive radio network spectrum usage term xg network xg network function limited available spectrum cognitive radio technology dynamic spectrum access spectrum mobility upper layer protocol cross-layer design challenge high variance spectrum management wireless network ine ciency new networking paradigm current research challenge wireless spectrum open research issue geographical variation novel functionality xg network architecture spectrum sharing fixed spectrum assignment policy brief overview large portion new communication paradigm

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