Transmission channel selection of cognitive radio networks based on quality optimization for video streaming
Journal of Computer Applications（2015）
Abstract
认知无线电网络中,次级用户选择信道的传统技术基于信道特性对传输信道进行随机选择,忽略了应用层视频业务对信道质量的要求.针对该问题提出了一种基于视频业务质量优化的信道选择技术,优化视频业务端到端的传输质量.通过最小化端到端视频失真,跨层优化综合选择物理层传输信道、自适应调制与编码模式以及应用层的编码量化参数.该方法在多信道认知无线电网络下进行了大量的视频传输仿真模拟实验.实验结果表明该方法能够比不合信道选择的跨层优化方法提高认知无线电网络下次级用户的视频传输业务客观质量1.5 dB以上.
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Key words
cognitive radio networks,quality optimization,channel,transmission
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