The influence of the large bandwidth-delay product on TCP Reno, NewReno, and SACK

Abstract

We compare the performance of TCP Reno, NewReno, and Selective Acknowledgement (SACK) on the large bandwidth-delay product (LED) network using the bandwidth-delay product and the bottleneck buffer size as control parameters via ns-2 simulations. The following results are obtained from the simulations. First, increasing the bandwidth-delay product leads to performance degradation regardless of TCP versions and the bottleneck buffer size. Second, NewReno outperforms Reno and SACK when no packet losses occur during the slow-start phase. Finally, increasing the bottleneck buffer size can lead to improvement of the link utilization, especially as the bandwidth-delay product grows.