Scheduled System Maintenance on May 29th, 2015:
IEEE Xplore will be upgraded between 11:00 AM and 10:00 PM EDT. During this time there may be intermittent impact on performance. We apologize for any inconvenience.
By Topic

Toward efficient radio spectrum utilization: user cooperation in cognitive radio networking

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)

In a cooperative cognitive radio network, secondary users are able to negotiate with primary users for dedicated transmission opportunities through providing tangible service. Two novel and simple user cooperation frameworks are introduced to improve the spectral efficiency and utilization. To this end, an orthogonal signaling-based cooperation technology for leveraging the degrees of freedom in two-dimensional modulation is discussed. In the proposed framework, anSU is enabled to simultaneously transmit its own data and relay another user's packets in two orthogonal channels. Specifically, in the framework of user cooperation between PUs and SUs, a cross-layer design for cooperative communications between an active PU and an SU is first investigated. In the framework of cooperative spectrum leasing by a group of SUs, a cross-layer design for cooperation among SUs is then presented. Cooperation performance in terms of a weighed sum throughput maximization under certain power and throughput constraints is evaluated and analyzed in both frameworks via simulations.

Published in:

Network, IEEE  (Volume:26 ,  Issue: 4 )