Date Added: Mar 2010
In Cognitive Radio (CR) networks, users are allowed to dynamically access the temporally unused channels to recycle the spectrum for better throughput. However, the dynamic channel availability also results in the highly variable and intermittent download to the users, which directly threats the on-top applications, especially for real-time service such as video streaming. To address the impact of the network dynamics on video streaming, the playout buffer is typically deployed at the receiver to guarantee the smooth media playback. In this paper, the authors exploit this flexibility for optimal spectrum allocation aiming at maximizing the overall network throughput while providing users with the smooth video playback.