摘要
无线通信技术在近些年的快速发展带来了对频谱资源需求的增长,而以往传统的固定频谱分配方式也带来了很多频谱资源的浪费现象.认知无线电网络可以很好地解决频谱资源的稀缺与浪费的现象,它的核心是让授权用户与其他用户一起共享频谱资源.频谱感知与频谱接入是认知无线电的两大基础技术,以往的研究均是将二者进行单独研究,而它们之间却是相互影响和制约的.提出基于非精确频谱感知的频谱分配与共享机制,分析了对授权用户的干扰所产生的影响,利用排队论理论求得非精确频谱感知下的用户最大数据传输率.
Cognitive radio become one of the important technology to solve the problem of spectrum scarcity in the future. The rapid growth of wireless communications made the spectrum resource becoming more and more scarcity. The concept of cognitive radio is proposed to address the issue of spectrum efficiency. In the cognitive networks, the secondary users （SUs ） are allowed to sense, detect and access the frequency bands that are not currently being in use by primary users （ PUs ）. Most former works study spectrum sensing or spectrum access respectively. And, when there are multiple SUs and multiple channels, the spectrum detection and spectrum sharing must be considered. In this paper, we propose a framework of multi-user spectrum allocation and sharing mechanism based on inaccurate spectrum sensing. We also study the interference to PUs caused by the dynamic access and the inaccurate sensing. The queuing theory is utilized to obtain the maximum average data rate of SUs.
出处
《小型微型计算机系统》
CSCD
北大核心
2016年第8期1802-1806,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金项目(61170058
61272133)资助
江苏省自然科学基金项目(BK2012632)资助
苏州工业基金项目(SYG201302)资助
关键词
认知无线电网络
频谱感知
频谱接入
频谱分配与共享
cognitive radio networks
spectrum sensing
spectrum access
spectrum allocation and sharing
