| Author(s): |
Nader Moayeri; |
| Title: |
How often and how long should a cognitive radio sense the spectrum? |
| Published: |
April 07, 2010 |
| 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: |
IEEE DySPAN 2010 |
| Pages: |
10 pp. |
| Location: |
Singapore, -1 |
| Dates: |
April 6-9, 2010 |
| Keywords: |
cognitive radio networks; opportunistic spectrum access; MAC layer protocol; pricing; economic model; Bayesian hypothesis testing |
| Research Areas: |
Telcommunications/Wireless |
| PDF version: |
 Click here to retrieve PDF version of paper (516KB) |
