Inventors:
Carlos M. Cordeiro - Ossining NY, US
Kiran S. Challapali - New City NY, US
Dagnachew Birru - Yorktown Heights NY, US
Assignee:
Koniklijke Philips Electronics N.V. - Eindhoven
International Classification:
H04L 12/43
H04J 3/16
Abstract:
The present invention is a system (), base station ()/customer premise equipment () apparatus, and method () for a two-stage quiet-period management mechanism that provides the required protection to incumbents (primary spectrum users) while supporting the desired QoS of secondary users participating in a cognitive radio network. In the first stage, a simple fast sensing () is done (e. g. , energy detection) by all devices in the network. Depending on the result of the fast sensing, the second and possibly longer stage, herein termed fine sensing (), is performed.