Early Retransmit for TCP and Stream Control Transmission Protocol (SCTP)
Mark C. Allman, Konstantin E. Avrachenkov, Urtzi Ayesta, Joshua T. Blanton, Per Hurtig · 2010
This document proposes a new mechanism for TCP and Stream Control Transmission Protocol (SCTP) that can be used to recover lost segments when a connection's congestion window is small.The "Early Retransmit" mechanism allows the transport to reduce, in certain special circumstances, the number of duplicate acknowledgments required to trigger a fast retransmission.This allows the transport to use fast retransmit to recover segment losses that would otherwise require a lengthy retransmission timeout.