NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Voice service support over cognitive radio networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Scalable video multicast in cognitive radio networks
IEEE Journal on Selected Areas in Communications
Opportunistic Spectrum Access via Periodic Channel Sensing
IEEE Transactions on Signal Processing
IEEE Communications Surveys & Tutorials
On optimal layering and bandwidth allocation for multisession video broadcasting
IEEE Transactions on Wireless Communications
The MPEG-4 fine-grained scalable video coding method for multimediastreaming over IP
IEEE Transactions on Multimedia
Capacity limits of cognitive radio with distributed and dynamic spectral activity
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
| Hi-index | 0.00 |
We propose a framework for video transmission over cognitive radio networks. Our objective is to determine the optimal streaming policy, optimal enhancement layer bit rate of each frame, in order to maximize the overall perceived video quality while keeping quality fluctuation at minimum. In our framework we introduce a channel usage pattern model based on the two-state Markov model and estimate the future busy and idle duration of spectrum based on past observations. On the basis of this scheme, we formulate the streaming optimization problem under the constraint of the available bandwidth budget so that the optimal number of enhancement layer bits are assigned to each frame. We extend this algorithm for three different optimization levels: frame, GOP and scene. We evaluate our algorithm through extensive trace-driven simulation, and show it improves the received video quality and increases bandwidth utilization.