摘要
在感知无线网络中,感知用户接入授权系统是提高频谱利用率的一种有效方法。本文将感知用户接入两种授权无线电系统的连续时间的马尔可夫模型,进一步推广到接入多种授权无线电系统的一般模型。在此基础上,推导并讨论了几个重要的系统参数:阻塞概率,被迫中断概率和信道利用率。数值结果表明,该系统在阻塞概率,被迫中断概率和信道利用率方面具有良好的QoS性能,并为进一步研究感知无线网络奠定基础。
In cognitive radio networks,spectrum access in licensed systems for cognitive radios promises an effective way of increasing band utilization.This paper first presents a model of spectrum access in two licensed systems for cognitive radios,and then proposes a general model of access in multi-licensed systems.Based on this,several important system parameters such as blocking probability,forced termination probability and bandwidth utilization are derived and discussed.Numerical results show that this system has high QoS in aspects of blocking probability,forced termination probability and bandwidth utilization.
出处
《河南科技大学学报（自然科学版）》
CAS
2008年第1期54-57,共4页
Journal of Henan University of Science And Technology:Natural Science
关键词
感知无线网络
授权系统
模型研究
Cognitive radio networks
Licensed system
Model studying
