170 search results - page 5 / 34 » Cognitive Transmissions with Multiple Relays in Cognitive Ra... |
INFOCOM
2010
IEEE
14 years 7 months ago
2010
IEEE
—Cognitive Radio Networks (CRNs) have recently emerged as a promising technology to improve spectrum utilization by allowing secondary users to dynamically access idle primary ch...
ICC
2009
IEEE
14 years 7 months ago
2009
IEEE
In this paper, we model the hierarchical structures inherent in cognitive radio networks as the priority queueing system in which primary users interact with the highest priority a...
IWCMC
2010
ACM
14 years 11 months ago
2010
ACM
To network cognitive radios that require spectrum sensing to identify transmission opportunities emerges as a critical technology to facilitate spectrum efficient wireless communi...
ICASSP
2011
IEEE
14 years 1 months ago
2011
IEEE
The problem of distributed multiuser medium access of a hierarchical cognitive radio network with multiple primary and secondary users is considered. Each primary user has a licen...
TMC
2010
14 years 7 months ago
2010
—We consider a point-to-multipoint cognitive radio network that shares a set of channels with a primary network. Within the cognitive radio network, a base station controls and s...