Competitive Interference-aware Spectrum Access in Cognitive Radio Networks

Jocelyne Elias; Fabio Martignon; Antonio Capone; Eitan Altman

inria-00496686, version 1

Competitive Interference-aware Spectrum Access in Cognitive Radio Networks

Jocelyne Elias ()^a^, 1, Fabio Martignon ()^b^, 1, Antonio Capone () ², Eitan Altman () ³

WiOpt'10: Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (2010) 164-169

a – Politecnico di Milano
b – University of Bergamo
1: University of Bergamo
http://www.unibg.it/en_index.asp
University of Bergamo Viale Marconi 5 24044 Dalmine (Bergamo) Italy Italy
2: Dipartimento di Elettronica e Informazione
http://www.elet.polimi.it/index.jsp
Politecnico di Milano Piazza Leonardo da Vinci 32, 20133 Milano Italy
3: MAESTRO (INRIA Sophia Antipolis)
INRIA – Université Montpellier II - Sciences et techniques France

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%% inria-00496686, version 1
%% http://hal.inria.fr/inria-00496686
@inproceedings{elias:inria-00496686,
    hal_id = {inria-00496686},
    url = {http://hal.inria.fr/inria-00496686},
    title = {{Competitive Interference-aware Spectrum Access in Cognitive Radio Networks}},
    author = {Elias, Jocelyne and Martignon, Fabio and Capone, Antonio and Altman, Eitan},
    abstract = {{Cognitive radio networks provide the capability to share the wireless channel with licensed (primary) users in an opportunistic manner. Primary users have a license to operate in a certain spectrum band; their access can only be controlled by the Primary Operator and is not affected by any other unlicensed (secondary) user. On the other hand, secondary users (SUs) have no spectrum license, and they attempt to exploit the spectral gaps left free by primary users. This work studies the spectrum access problem in cognitive radio networks from a game theoretical perspective. The problem is modeled as a non-cooperative spectrum access game where secondary users access simultaneously multiple spectrum bands left available by primary users, optimizing their objective function which takes into account the congestion level observed on the available spectrum bands. As a key innovative feature with respect to existing works, we model accurately the interference between SUs, capturing the effect of spatial reuse. We demonstrate the existence of the Nash equilibrium, and derive equilibrium flow settings. Finally, we provide numerical results of the proposed spectrum access game in several cognitive radio scenarios, and study the impact of the interference between SUs on the game efficiency. Our results indicate that the congestion cost functions we propose in this paper lead to small gaps between Nash equilibria and optimal solutions in all the considered network scenarios, thus representing a starting point for designing pricing mechanisms so as to obtain a socially optimal use of the network.}},
    keywords = {Cognitive Radio Networks ; Spectrum access ; Game Theory ; Price of Anarchy},
    language = {English},
    affiliation = {University of Bergamo , Dipartimento di Elettronica e Informazione , MAESTRO - INRIA Sophia Antipolis},
    booktitle = {{WiOpt'10: Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks}},
    pages = {164-169},
    address = {Avignon, France},
    note = {Cognitive Radio and Spectrum Access },
    audience = {international },
    year = {2010},
    pdf = {http://hal.inria.fr/inria-00496686/PDF/p164-elias.pdf},
}

%F inria-00496686, version 1
%0 Conference Proceedings
%U http://hal.inria.fr/inria-00496686
%2 INFO:INFO_MC;INFO:INFO_NI
%T Competitive Interference-aware Spectrum Access in Cognitive Radio Networks
%A Elias, Jocelyne
%A Martignon, Fabio
%A Capone, Antonio
%A Altman, Eitan
%+ University of Bergamo , Dipartimento di Elettronica e Informazione , MAESTRO - INRIA Sophia Antipolis
%X Cognitive radio networks provide the capability to share the wireless channel with licensed (primary) users in an opportunistic manner. Primary users have a license to operate in a certain spectrum band; their access can only be controlled by the Primary Operator and is not affected by any other unlicensed (secondary) user. On the other hand, secondary users (SUs) have no spectrum license, and they attempt to exploit the spectral gaps left free by primary users. This work studies the spectrum access problem in cognitive radio networks from a game theoretical perspective. The problem is modeled as a non-cooperative spectrum access game where secondary users access simultaneously multiple spectrum bands left available by primary users, optimizing their objective function which takes into account the congestion level observed on the available spectrum bands. As a key innovative feature with respect to existing works, we model accurately the interference between SUs, capturing the effect of spatial reuse. We demonstrate the existence of the Nash equilibrium, and derive equilibrium flow settings. Finally, we provide numerical results of the proposed spectrum access game in several cognitive radio scenarios, and study the impact of the interference between SUs on the game efficiency. Our results indicate that the congestion cost functions we propose in this paper lead to small gaps between Nash equilibria and optimal solutions in all the considered network scenarios, thus representing a starting point for designing pricing mechanisms so as to obtain a socially optimal use of the network.
%G English
%8 2010-00-00
%2 international
%B WiOpt'10: Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
%2 Avignon
%2 France
%8 2010-05-31
%8 2010-06-04
%P 164-169
%K Cognitive Radio Networks ; Spectrum access ; Game Theory ; Price of Anarchy
%Z Cognitive Radio and Spectrum Access