Cognitive radio (CR) technology enables the opportunistic use of the vacant licensed
frequency bands, thereby improving the spectrum utilization. However, the CR operation …

Recent research in the emerging field of cognitive radio (CR) has mainly focussed on
spectrum sensing and sharing, that allow an opportunistic use of the vacant portions of the …

Although more than a decade has passed from the proposal of the Cognitive Radio
paradigm, in these years the research has mainly focused on physical and medium access …

Two main issues affect the existing routing metrics for cognitive radio ad hoc networks: i)
they are often based on heuristics, and thus they have not been proved to be optimal; ii) they …

Existing research in transport protocols for wireless ad-hoc networks has focused on reliable
end-to-end packet delivery under uncertain channel conditions, route failures due to node …

Cognitive radio networks (CRNs) are composed of cognitive, spectrum-agile devices
capable of changing their configurations on the fly based on the spectral environment. This …

Cognitive radio ad hoc networks (CRAHNs) constitute a viable solution to solve the current
problems of inefficiency in the spectrum allocation, and to deploy highly reconfigurable and …

Cognitive radio (CR) is an enabling technology to allow unlicensed (secondary) users to
exploit the spectrum allocated to licensed (primary) users in an opportunistic manner. CR is …

The topology of a cognitive radio Ad Hoc network is highly influenced by the behavior of
both licensed (primary) and unlicensed (secondary) users. In fact, the network connectivity …

Cognitive wireless ad hoc is highly focused as a promising future wireless technology.
However, cognitive wireless ad hoc networks have some difficulties of neighbor discovery …