Worldwide trends in regulation of secondary access to white spaces using cognitive radio

Nekovee, Maziar; Irnich, Tim; Karlsson, Jörgen

doi:10.1109/mwc.2012.6272421

Cited by 54 publications

(32 citation statements)

References 3 publications

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“…Throughout this paper, we assume that the N source-destination pairs are coordinated e.g. through a common spectrum database [23], [24], which guarantees that all the source nodes can orderly access their shared spectrum without signal interference. The design of a specific spectrum sharing policy [25] should consider both the spectrum efficiency and sharing fairness between different user pairs, which is beyond the scope of this paper.…”

Section: A System Model and Problem Formulationmentioning

confidence: 99%

Physical-Layer Security for Spectrum Sharing Systems

Zou

2017

IEEE Trans. Wireless Commun.

119

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Abstract-In this paper, we examine the physical-layer security for a spectrum sharing system consisting of multiple sourcedestination pairs, which dynamically access their shared spectrum for data transmissions in the presence of an eavesdropper. We propose a source cooperation (SC) aided opportunistic jamming framework for protecting the transmission confidentiality of the spectrum sharing system against eavesdropping. Specifically, when a source node is allowed to access the shared spectrum for data transmissions, another source is opportunistically selected in the spectrum sharing system to transmit an artificial noise for disrupting the eavesdropper without affecting the legitimate transmissions. We present two specific SC aided opportunistic jamming schemes, namely the SC aided random jammer selection (RJS) and optimal jammer selection (OJS), which are referred to as the SC-RJS and SC-OJS, respectively. We also consider the conventional non-cooperation as a baseline. We derive closedform intercept probability expressions for the non-cooperation, SC-RJS and SC-OJS schemes, based on which their secrecy diversity gains are determined through an asymptotic intercept probability analysis in the high signal-to-noise ratio (SNR) region. It is proved that the conventional non-cooperation exhibits a secrecy diversity of zero, whereas the proposed SC-RJS and SC-OJS achieve a higher secrecy diversity of one. This also surprisingly means that no additional secrecy diversity gain is achieved by the optimal jammer selection compared to the random selection strategy. In addition, numerical results show that the intercept probability performance of the SC-OJS is always better than that of the SC-RJS and non-cooperation, even when the legitimate channel is worse than the eavesdropping channel.Index Terms-Physical-layer security, spectrum sharing, intercept probability, secrecy diversity, diversity gain.

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Section: A System Model and Problem Formulationmentioning

confidence: 99%

Physical-Layer Security for Spectrum Sharing Systems

Zou

2017

IEEE Trans. Wireless Commun.

119

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“…Frequencies used by the licensed system as well as unused frequencies can be seen from the database. Spectrum databases are currently heavily supported in many terrestrial scenarios, including TV white space operation [20]. When the secondary system needs to transmit, it requires spectrum from the spectrum broker that is governing the database, and available band is given for it.…”

Section: Database Approachmentioning

confidence: 99%

Secondary Terrestrial Use of Broadcasting Satellite Services below 3 GHz

Höyhtyä¹

2013

IJWMN

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“…In case that the secondary user is using the spectrum and a primary user starts operating, then the secondary user is obliged to immediately vacate the channel in order to avoid causing interference to the primary user. To ensure this, the UK regulator, Ofcom and Federal Communication Commission (FCC) in the United States, have proposed three methods to be used by secondary users: beacons, sensing and geo-location with database [7]. When beacons are used as a controlling method, secondary users will only start transmitting if they have already received a beacon signal recognizing the vacant channel.…”

Section: Introductionmentioning

confidence: 99%

A Decentralized Approach for Self-Coexistence Among Heterogeneous Networks in TVWS

Maloku

Hamiti

Fazliu

et al. 2018

IEEE Trans. Veh. Technol.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-This paper focuses on coexistence and selfcoexistence challenges between secondary heterogeneous wireless networks/users sharing TV Whitespace spectrum. The coexistence problems arise from having several primary and secondary networks of different technologies cohabiting the same licensed spectrum simultaneously. The self-coexistence problems arise from many secondary systems /users coexisting at the same place while using identical or different technologies. In particular, fair distribution of available spectrum becomes a serious issue. In this work we use a game theoretic approach to model the self-coexistence problem as a competitive game between secondary networks. We show that our game belongs to the class of congestion-averse games which are known to posses pure Nash Equilibria. This leads us to a decentralized approach for spectrum sharing among systems with different PHY/MAC characteristics. We show that our proposal outperforms other centralized algorithms in terms of user fairness and per-user theoretical data rates. Permanent

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Worldwide trends in regulation of secondary access to white spaces using cognitive radio

Cited by 54 publications

References 3 publications

Physical-Layer Security for Spectrum Sharing Systems

Physical-Layer Security for Spectrum Sharing Systems

Secondary Terrestrial Use of Broadcasting Satellite Services below 3 GHz

A Decentralized Approach for Self-Coexistence Among Heterogeneous Networks in TVWS

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