Adaptive Video Transmission Over A Single Wireless Link

In this paper, we propose an adaptive priority-based selective repeat ARQ (PSR-ARQ) transmission scheme for transmitting video over a single-hop lossy wireless link. If transmission errors occur in a lower layer of the video, the errors propagate to all the higher layers of related frames resulting in significant degradation of the video quality at the receiver. Due to the limited channel bandwidth, retransmission of every corrupted packet may be unacceptable for video streaming applications. Our proposed on-line priority-based scheme prioritizes all layers of various frames of a group of pictures and transmits them over a lossy wireless link. The online transmission policy achieves good video quality (of small distortion). Simulation results show that the proposed scheme performs better than the traditional scheme for video transmission over wireless channels.