Research on Adaptive FEC for Video Delivery over WLAN

This paper presents an algorithm to mend the Enhanced Adaptive FEC (EAFEC) mechanism for improving video delivery over WLAN. The algorithm is based on two factors, first of which is the queue length in the access point (AP), indicating network traffic load; the other is packet retransmission times, indicating wireless channel state. According to these factors, two different redundant FEC packets were calculated separately, through setting the redundant FEC packets different weight value, the final redundant FEC packets is acquired. The simulation test proved there is much improvement especially in sudden changing video scenes, when our algorithm is adopted, compared to EAFEC.