摘要
无线传感器网络中的节点众多,节点之间仅依靠频谱资源管理机制分配的频段进行数据传输会造成频谱资源紧张。针对这一问题,将认知无线电技术引入分簇的无线传感器网络,并且考虑分簇无线传感器网络节点的能量受限问题提出了一种节能的频谱感知方案。此方案首先让簇内的节点采取双门限能量检测的协作频谱感知方法,在满足目标检测概率和虚警概率的条件下,确定进行频谱感知的最少节点数,降低系统能耗。其次,通过选择合适的簇内节点进行频谱感知,使簇内节点的能耗均衡,簇的生命周期得到延长。
Wireless sensor networks have many nodes, only relying on the band which the spectrum resource management mechanism assigned will led to spectrum resources in short supply. Arming to this problem, this paper introduces the cognitive radio technology into clustered wireless sensor networks. Considering the energy constrained problem, this paper puts forward an energy-efficient spectrum sensing scheme. This scheme, firstly, makes the nodes in cluster take double-threshold cooperative spectrum sensing method, reduce the number of nodes which send the perception results and lower system energy consumption. Secondly, this scheme optimizes the life cycle of the cluster from selecting proper nodes to perceive the spectrum.
出处
《数字通信》
2013年第2期27-32,共6页
Digital Communications and Networks
基金
重大基础研究973课题资助项目(2011CB302903)
关键词
分簇无线传感器网络
频谱感知
能耗
生命周期
clustered wireless sensor networks
spectrum sensing
energy consumption
life cycle
