Highly Reliable Inter/Intra-Stream FEC Method for Multi-Server Content Distribution

To establish seamless and highly robust contents distribution technology in the environment of so-called multiserver contents distribution network, we focus on the Forward Error Correction (FEC) as an error recovery method, and we have proposed the new concept, Inter-Stream FEC, that means data recovery method between several streams by introducing redundant parity streams generated by inter-stream cooperation. In this paper, we extensively improve the proposed basic method. We focus on the recovery failure events in the original InterStream FEC method, and propose its remedy. The proposed method makes existing FEC and Inter-Stream FEC cooperate deeply and this leads to higher loss recovery ratio. Besides, we evaluate the basic method and the extensively proposed method through computer simulation and confirm that proposal can improve recovery capability.