Abstract: For wireless channel is inherently lossy, it is challengeable to maintain the quality of service(QOS) for live streaming. We proposed a well-designed light weighted negative-ACKnowledgment(NACK) oriented reliable multicast protocol, which combines the NGbased repair in its design. NORM repair process uses time slot as the base mechanism,which results in long repair cycle. In our protocol,fecdback round algorithm is applied to optimize the repair processing.Benefits of network coding for live streaming multicast over wireless channel was also analyzed in this paper. Experiment results show that the payload throughput of our protocol is about 0. 5 times greater than that of NORM.

Key words: Network coding,Wircless channcl,Livc strcaming,Fecdback round,Multicast