Retransmission Flow Control Mechanism for Reliable Multicast using Adaptive Caching

In recent years, several network support schemes for reliable multicast were proposed. RMAC(Reliable Multicast using Adaptive Caching) provides router-assisted reliable multicast transport. It improves retransmission efficiency by caching transmitted data adaptively to network condition at RMAC routers. Bandwidth utilization is also improved by dropping unnecessary feedbacks and retransmissions at RMAC routers. However, RMAC does not control retransmission flows. Frequent retransmission flows generated by uncontrolled requests from ”Crying Baby” receivers causes congestion, preventing other receivers from keeping their proper throughput. In this paper, we describe a mechanism to control retransmission flows in RMAC. The target of our mechanism is to dissolve congestion by controlling “Crying Baby” receivers’ requests for