Abstract: In this paper,an adaptive link-level Hybrid automatic repeat request (ARQ) mechanism was proposed for wireless media streaming,in the hope that the media could be played on receivers with high quality. It allocate the optimal HARQ schemes for different traffic streaming,according to channel condition or differentiated QoS requirements dynamically. The mechanism,based on cross-layer optimization design,predicts the packet loss rate using the enhanced GM (1,1) model,and adjusts the ARQ parameter N_max. Besides,an adaptive FEC at the application layer was used to adjust the sending rate of MPEG video frame adaptively and to allocate the network bandwidth resource between the MPEG video source data and the redundant data dynamically. Both the analysis and simulation results demonstrate that the proposed mechanism can significantly improve quality of media streaming,in terms of playable frame rate,reliability and real-time performance on the receiving side.