摘要
针对协作认知无线网络(CCRN)设计了一种基于优先级队列的两级中心协作频谱共享机制(PQTL-CSS)。通过招募认知用户作为中继,协助完成授权通信,并将传统的数据协作拓展至管理协作,由协作认知节点协调其他认知节点的接入,形成由主用户和协作认知节点构成的两级中心管理结构。在保障主用户最高优先级的同时,作为对认知节点协助授权业务传输的回报,赋予其高于非协作认知节点的信道接入权限。本文对不同用户的时延和吞吐量性能进行仿真,结果表明,PQTL-CSS能够在业务随机性较强的情况下,实现多种类型节点的动态、高效频谱共享。
A two-layer centralized spectrum sharing scheme based on priority queue（PQTL-CSS）is designed for Cooperative Cognitive Radio Networks（CCRN）.By recruiting a secondary user as relay,the primary transmission is accomplished with assistance.The proposed mechanism extends the traditional data cooperation to management collaboration,with which Cooperative Secondary User（CSU）coordinates the access of other cognitive nodes.Then,a two-layer centralized management structure is formed by the primary user and CSU corporately.On the premise that the highest priority of primary user is guaranteed,the CSU is given higher access authority in comparison with those noncooperative secondary users,as a reward of assisting the primary＇s data transmission.Simulation is conducted with regard to the delay and throughput performance of different types of user.Results show that the proposed PQTL-CSS can achieve dynamic and highly efficient spectrum sharing of multiple types of node in the situation where traffic is of high randomness.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2016年第5期1651-1659,共9页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(61102057)
新一代宽带无线移动通信网重大专项项目(2012ZX03003005-005)
高等学校引智计划基金项目(B08038)
中央高校基本科研业务费项目(K5051301014)
关键词
通信技术
协作认知无线网络
频谱共享
优先级队列
时延
communication technology
cooperative cognitive radio networks
spectrum sharing
priority queue
delay
