Downlink Video Streaming for Users Non-Equidistant from Base Station

• Main Authors: S. Pejoski, V. Kafedziski
• Format: Article
• Language: English
• Published: Spolecnost pro radioelektronicke inzenyrstvi 2012-06-01
• Series: Radioengineering
• Subjects: Multiuser video streaming; non-equidistant users; cross-layer; outage probability; fairness; H.264/AVC
• Online Access: http://www.radioeng.cz/fulltexts/2012/12_02_0772_0780.pdf

We consider multiuser video transmission for users that are non-equidistantly positioned from base station. We propose a greedy algorithm for video streaming in a wireless system with capacity achieving channel coding, that implements the cross-layer principle by partially separating the physical and the application layer. In such a system the parameters at the physical layer are dependent on the packet length and the conditions in the wireless channel and the parameters at the application layer are dependent on the reduction of the expected distortion assuming no packet errors in the system. We also address the fairness in the multiuser video system with non-equidistantly positioned users. Our fairness algorithm is based on modified opportunistic round robin scheduling. We evaluate the performance of the proposed algorithms by simulating the transmission of H.264/AVC video signals in a TDMA wireless system.