Video Traffic over Wireless Links: Issues and Performance

This paper presents a wireless transport system for real-time multimedia services over personal communication services (PCS) networks.The proposed system uses a hybrid ARQ scheme for error control because it can efficiently adapt to nonstationary wireless channels and yield good throughput and reliability. In particular, delay and delay jitter control related to retransmissions in the error control module is addressed. An adaptive source rate control protocol is used to deal with the fluctuation of the effective data rate due to fades and retransmissions. A novel adaptive synchronization protocol is developed to compensate for long-term delay variation due to large-scale (shadowing) fading so that synchronization is maintained and end-to-end delay is kept low. Simulation results from the performance evaluation of the system are presented