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

Currently, the radio spectrum is statically allocated and divided between licensed and
unlicensed frequencies. Due to this inflexible policy, some frequency bands are growing in …

Maritime networks establish wireless multi-hop networks to provide wireless broadband
service at sea, connecting various kinds of ships, maritime buoys, and beacons. The …

The Cognitive Radio and the Cognitive Radio Networks have recently become one of the
most intensively studied paradigms in wireless communications. The main distinctive …

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 …

The tremendous growth in ubiquitous low-cost wireless applications that utilize the
unlicensed spectrum bands has laid increasing stress on the limited and scarce radio …

New wireless network paradigms will demand higher spectrum use and availability to cope
with emerging data-hungry devices. Traditional static spectrum allocation policies cause …

The concept of a multi-interface multi-channel cognitive radio is both novel and promising.
Indeed, such opportunistic access to the spectrum, over multiple channels in a simultaneous …

摘要随着无线频谱资源短缺问题的日益突出, 认知无线电网络得到了广泛关注和研究.
在这类网络中, 媒体接入控制MAC 协议是关键技术之一. 特别是在认知无线电自组织网络中 …

Cognitive radio ad hoc networks (CRAHNs) consist of autonomous nodes that operate in ad
hoc mode and aim at efficient utilization of spectrum resources. Usually, the cognitive nodes …