摘要
为了分析非理想感知结果对认知无线网络系统性能的影响,针对动态信道绑定策略,考虑感知过程中可能出现的漏检错误和误警错误,建立了一种带有多服务台同步中断的修正的抢占优先排队模型。采用矩阵几何解方法给出主用户数据包干扰率、信道利用率及次级用户数据包平均时延等性能指标的表达式,并通过数值实验揭示了不同性能指标间的折中关系。建立了系统成本函数,给出了非理想感知条件下动态信道绑定策略的优化方案。
In order to investigate the influence of imperfect sensing results on system performance in cognitive radio networks,considering the possible sensing errors,such as misdetection and false alarm,in dynamic channel bonding strategy,a modified preemptive priority queueing model with multi-server synchronous interruption is established.Using the method of matrix geometric solution,performance measures in terms of interference ratio of primary user packets,channel utilization and average delay of secondary user packets are derived,then the trade-off between different performances measures is revealed with numerical results.By constructing a system cost function,the optimum design for the dynamic channel bonding strategy with imperfect channel sensing is presented.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2016年第5期1667-1674,共8页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(61472342
61572379)
关键词
通信技术
认知无线网络
非理想感知
信道绑定
多服务台
同步中断
成本优化
communication technology
cognitive radio networks
imperfect channel sensing
channel bonding
multi-server
synchronous interruption
cost optimization
