The Concept of Referential Loss Recovery for Real-Time Applications and its Improvements of QoS Provision

Real-time multimedia streaming is expected to grow rapidly in the near future. Packet losses during transmission are a serious problem for these multimedia applications since they result in degradation of the quality of service (QoS). Forward error correction (FEC) is a promising technique to recover the lost packets and improve the QoS of streaming media. However, FEC may degrade the QoS of all streaming due to the increased congestion caused by FEC overhead when streaming sessions increase. In this paper, a novel FEC method that avoids the adverse effect of FEC overhead during media streaming is proposed. Also, we define the maximum percentage of network load where FEC can improve the packet loss ratio to clarify the effective ranges where each FEC and automatic repeat request (ARQ) scheme works well. The numerical analyses show that our proposed method highly improves the packet loss ratio compared to conventional method