How often and how long should a cognitive radio sense the spectrum?

Published

April 7, 2010

Author(s)

Nader Moayeri

Abstract

This paper presents a Bayesian framework and a pricing structure for a secondary wireless user that opportunistically uses a RF channel belonging to a network of N primary users. The secondary user operates in a time-slotted fashion, where each time slot consists of observing the channel for D seconds followed by possibly using it for W seconds depending on the decision the user makes after observing the channel. The paper assumes the secondary user observes the on-off Markov process modeling the primary user activity corrupted by additive white Gaussian noise, and it employs a decision rule that is a time-averager followed by a threshold device. The pricing structure includes rewards for the secondary user for successful use of the channel and penalties when it interferes with the primary users. The paper derives a formula for the time normalized net profit of the secondary user. Numerical results are presented that show the behavior of the maximum profit as a function of various network parameters.

Proceedings Title

IEEE DySPAN 2010

Conference Dates

April 6-9, 2010

Conference Location

Singapore

Pub Type

Conferences

Download Paper

Local Download

Keywords

cognitive radio networks, opportunistic spectrum access, MAC layer protocol, pricing, economic model, Bayesian hypothesis testing

Citation

Moayeri, N. (2010), How often and how long should a cognitive radio sense the spectrum?, IEEE DySPAN 2010, Singapore, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904316 (Accessed October 20, 2025)