Selective Mapping for Real-Time Video Transport over Wireless LAN

摘要

Multimedia applications such as video streaming have posed challenges over the wireless networks. A selective mapping approach was proposed in this paper to address the quality of delay-sensitive video transmitted over 802.11e EDCA wireless LAN. This cross-layer design takes into account the importance of packets and end-to-end delay requirements. Packets of high importance will be assigned to virtual queues if they can meet the playback deadline. Packets in the virtual queues will then be mapped into different AC queues according to the queuing delay it may experience. The number of important packets dropped will be reduced under heavy network traffic. Simulation results show that this approach can improve the quality of video and maintain an acceptable end-to-end delay for delay-sensitive video streaming applications.