Rendezvous for Cognitive Radios

Performance Evaluation of the Effect of Primary Users on the Rendezvous process for Cognitive Radios

The Rendezvous process is an essential process for establishing a communication link between two nodes in cognitive radio networks. A number of rendezvous protocols have been developed in the last few years. However, many protocols ignore one of the basic constraints of cognitive radio networks which is the impact of the primary users (PUs) on the performance of the rendezvous process. In this ...

RAC2E: Novel rendezvous protocol for Asynchronous Cognitive radios in Cooperative Environments

ZOS: A Fast Rendezvous Algorithm Based on Set of Available Channels for Cognitive Radios

Most of existing rendezvous algorithms generate channel-hopping sequences based on the whole channel set. They are inefficient when the set of available channels is a small subset of the whole channel set. We propose a new algorithm called ZOS which uses three types of elementary sequences (namely, Zero-type, One-type, and S-type) to generate channel-hopping sequences based on the set of availa...

Networking Cognitive Radios for Tactical

This research aims to develop fundamental theories and practical protocols for tactical communication networks of cognitive radios. It focuses on three key areas of cognitive networking: (i) opportunity sensing and cognition; (ii) opportunity tracking and exploitation; and (iii) cognitive networking. We have successfully completed this project. Below we highlight a few most important results ob...

Cognitive Radios for Spectrum Sharing

Wireless systems require spectrum to operate, but interference is likely if radios in physical proximity simultaneously operate on the same band. Therefore, spectrum is a potentially scarce resource; across the planet today, spectrum is regulated so that most bands are allocated exclusively to a single system licensed to use that band in any given location. However, such static spectrum allocat...