Adaptive Payload Length Algorithm for Video Transmission Over Wireless Multi-hop Networks

Video transmission over wireless multi-hop networks is challenging due to the varying nature of the wireless channel as well as the inherent difference between the video data traffic and the general data traffic. A single bit error in a packet may lead to the packet loss, which results in poor quality of the entire video frame. In this paper, we first analyze the effect of payload length on the overhead of bit error, video frame reassembly and network efficiency. Then, to improve the quality of video transmission, we propose an adaptive payload length algorithm based on the digital fountain codes while take transmission efficiency into account. The simulation environment is also designed to evaluate the performance of multi-hop video transmission, which is based on the ARM embedded system. Numerical simulations show that adaptive payload length algorithm can improve the quality of video transmission over wireless multi-hop networks.