摘要
综述了认知无线网络的关键技术和研究进展。首先,从物理层的频谱感知和网络层的可用带宽估计两方面对网络环境感知技术进行了总结和归纳;其次,对目前的多信道MAC协议进行了分类,重点分析了不同多信道MAC协议实现方法的优缺点和适用场景;然后,对认知无线网络中智能决策和网络重构的实现框架进行了介绍,并总结了其中需要突破的关键技术;最后,对认知无线网络的重点研究方向给出了建议。
Key techniques in cognitive wireless networks and the state-of-the-art of this research were surveyed.The first focus was on the techniques to obtain network information,which was classified into spectrum sensing in PHY layer and available bandwidth estimation in network layer.Second,the design of multi-channel MAC protocols was introduced.In particular,both the characteristics and the applicable scenarios were analyzed for different types of multi-channel MAC protocols.Third,key techniques in the intelligent decision and the network reconfiguration were discussed.In the end,several suggestions on future research topics that should be put more effort in this field were given.
出处
《通信学报》
EI
CSCD
北大核心
2011年第11期147-158,共12页
Journal on Communications
基金
国家自然科学基金资助项目(61002032)
"十二五"通信装备预研基金资助项目(41001010403)
全军军事学研究生课题(2010JY0075-006)~~
关键词
认知无线网络
频谱感知
可用带宽估计
多信道MAC协议
智能决策
网络重构
cognitive wireless networks
spectrum sensing
available bandwidth estimation
multi-channel MAC
intel-ligent decision
network reconfiguration
