Dynamic spectrum policies combined with software defined radio are powerful means to
improve the overall spectral efficiency allowing the development of new wireless services …

The stringent requirements of wireless multimedia transmission lead to very high radio
spectrum solicitation. Although the radio spectrum is considered as a scarce resource, the …

Next-generation wireless networks are expected to support extremely high data rates and
radically new applications, which require a new wireless radio technology paradigm. The …

Dynamic spectrum access stands as a promising and spectrum-efficient communication
approach for resource-constrained multihop wireless sensor networks due to their event …

Cognitive radio networks (CRNs) offer a promising solution for spectrum scarcity problem by
means of dynamic spectrum access. So long as in highly dynamic environments, the …

Spectrum handoff is an indispensable component in cognitive radio networks to provide
resilient service for the secondary users. In this paper, we explore the spectrum handoff …

Enabling the spectrum handoff for multimedia applications in cognitive radio networks
(CRNs) is challenging, due to multiple interruptions from primary users (PUs), contentions …

Cognitive radio (CR) is a promising wireless technology that provides efficient spectral
usage. Medium Access Control (MAC) has an important role in several cognitive radio …

Wireless communication technology is the future of communication, but rapid growth in
wireless technology has led to a scarcity in the spectrum. Thus, the world has moved away …

A cognitive radio system has the ability to observe and learn from the environment, adapt to
the environmental conditions, and use the radio spectrum more efficiently. However, due to …