瑞利衰落信道下延迟敏感业务的CR频谱管理

Spectrum management for delay-sensitive applications over CR in the Rayleigh fading channel

在平坦的瑞利衰落信道条件下,针对认知无线电网络中的延迟敏感型业务,考虑其延迟时限的要求,提出一个动态信道选择方案.为了管理分布式的可用频谱资源,认知用户通过一个虚拟排队模型的接口进行信息交换并使用优先虚拟排队分析估计期望延迟,并利用了相应的动态策略学习算法,使延迟敏感业务能够动态适应信道选择方案以达到最小化丢包率目的.

Considering the delay deadlines for delay-sensitive applications, a dynamic channel selection method was proposed in the fiat Rayleigh fading channel condition. In order to manage the available distributed resources spectrum, cognitive user determined the required information through a virtual queue interface and analyzed the expectation delay estimation by using the priority virtual queue. The delay-sensitive applications can dynamically adapt to the channel selection and achieve the purpose of minimizing the packet lossing rates by using the corresponding dynamic strategy learning （DSL） algorithm.