Performance evaluation of ACK-based and NAK-based flow control schemes for reliable multicast

In this paper, we evaluate the performance of flow control schemes for reliable multicast under several retransmission approaches in terms of scalability. The schemes examined are a window-based flow control scheme for ACK-based retransmission approaches and a rate-based flow control scheme for NAK-based retransmission approaches. Our simulation results show that the NAK-based flow control scheme has better scalability and higher throughput than the ACK-based flow control scheme, and the delay incurred by a NAK-suppression mechanism does not affect the performance of multicast flow control