Cross-Layer Design for Packetized Video Communications over Wireless Ad Hoc Networks

With the growing popularity of video communications in wireless ad hoc network, cross-layer design (CLD) provides a novel technique that can dynamically accommodate its policy to time-varying channel condition and guarantee different Quality of Service (QOS) in real-time video transmission. In this paper, to minimize the distortion of real-time video transmission, we propose a cross-layer optimized framework which jointly combines network layer, MAC layer and physical layer, and then use the queue length and the Signal to Interference-plus-Noise Ratio (SINR) as the cross-layer information to make on-line routing decisions. The video is coded with multiple description coding (MDC) and single description coding (SDC), and experimental results validate the effectiveness of our approach.