认知无线电网络MAC层协议研究  

Research on MAC Protocol for Cognitive Radio Networks

作　　者：李晓艳[1] 张勇 陈蕾[1] LI Xiao-Yan;ZHANG Yong;CHEN Lei(School of Electronic Information Engineering,Xi＇an Technological University,Xi＇an 710021,China)

机构地区：[1]西安工业大学电子信息工程学院,西安710021

出　　处：《计算机系统应用》2018年第9期236-242,共7页Computer Systems & Applications

基　　金：陕西省教育厅科研计划项目(2016JK1387);国家自然科学基金面上项目(61271362)~~

摘　　要：认知网络按照一定的准则划分为若干个簇,簇内共享一条信道用于交换控制信息,这种以分簇的方式实现按区域共享信道是认知无线电MAC层频谱共享问题的解决方法之一.为了使分簇结构更加有效的工作,本文提出了一种针对分簇结构的MAC层协议.在该协议中,信道接入时间被划分成一系列的超级帧,超级帧的各个时段均对应簇节点的具体操作,以此支撑簇结构稳健地应对主用户行为.仿真结果表明,本文提出的MAC协议在中高网络负载情况下能获得较高的网络吞吐量以及较低的传输时延.Following some rules, the Cognitive Radio Networks（CRNs） can be divided into several clusters, each cluster has a Common Control Channel（CCC） to exchange control information. The cluster-based CCC is one of the solutions to the problem of spectrum sharing on MAC protocol for CRNs. In order to validate the clustering structure, we propose a MAC protocol based on clustering. In our protocol, channel access time is divided into a sequence of superframes. Each period in superframes is corresponding to the operation of cluster node. This mechanism can make the cluster structure more robust to the primary users＇ activities. Simulation results reveal that our proposed MAC protocol can achieve higher throughput and lower delay in high traffic conditions.

关 键 词：认知无线电 MAC协议 频谱共享 超帧 

分 类 号：TN925[电子电信—通信与信息系统]