Supporting secondary users through a collateral network dedicated to spectrum sensing has been recently proposed as a mean to overcome spectrum sensing limitations of secondary devices. Building on this idea, we propose a protocol for a Wireless Sensor Network (WSN) to support secondary devices of an Opportunistic Spectrum Access (OSA) network. We examine the fundamental tradeoff between the statistics of the primary network traffic for which the WSN is able to support the OSA network and the interference range or, equivalently, the transmit power of secondary transmitters. We optimize the parameters of the proposed protocol to achieve the minimum delay for delivering channel availability information to secondary users, thus maximizing the portion of time they can effectively use idle primary channels to send their data. We further provide simulation results to demonstrate the feasibility and effectiveness of our design, and point at possible research directions to improve the proposed system capabilities.

Wireless Sensor Networks for Spectrum Sensing to Support Opportunistic Spectrum Access Networks: Protocol Design and Fundamental Trade-offs / Pescosolido, Loreto; Petrioli, Chiara. - STAMPA. - (2011), pp. 422-427. (Intervento presentato al convegno IEEE Wireless Communications and Networking Conference (WCNC) tenutosi a Cancun, MEXICO nel MAR 28-31, 2011) [10.1109/wcnc.2011.5779170].

Wireless Sensor Networks for Spectrum Sensing to Support Opportunistic Spectrum Access Networks: Protocol Design and Fundamental Trade-offs

PESCOSOLIDO, Loreto;PETRIOLI, Chiara
2011

Abstract

Supporting secondary users through a collateral network dedicated to spectrum sensing has been recently proposed as a mean to overcome spectrum sensing limitations of secondary devices. Building on this idea, we propose a protocol for a Wireless Sensor Network (WSN) to support secondary devices of an Opportunistic Spectrum Access (OSA) network. We examine the fundamental tradeoff between the statistics of the primary network traffic for which the WSN is able to support the OSA network and the interference range or, equivalently, the transmit power of secondary transmitters. We optimize the parameters of the proposed protocol to achieve the minimum delay for delivering channel availability information to secondary users, thus maximizing the portion of time they can effectively use idle primary channels to send their data. We further provide simulation results to demonstrate the feasibility and effectiveness of our design, and point at possible research directions to improve the proposed system capabilities.
2011
IEEE Wireless Communications and Networking Conference (WCNC)
distributed sensor networks; cognitive radio networks; spectrum sensing; dynamic spectrum access; opportunistic spectrum access
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Wireless Sensor Networks for Spectrum Sensing to Support Opportunistic Spectrum Access Networks: Protocol Design and Fundamental Trade-offs / Pescosolido, Loreto; Petrioli, Chiara. - STAMPA. - (2011), pp. 422-427. (Intervento presentato al convegno IEEE Wireless Communications and Networking Conference (WCNC) tenutosi a Cancun, MEXICO nel MAR 28-31, 2011) [10.1109/wcnc.2011.5779170].
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