TCP-swift: an end-host enhancement scheme for TCP over satellite IP networks

Abstract

A new transport layer protocol called TCP-Swift is proposed for enhancing the TCP performance over satellite /P networks. TCP-Swift replaces the conventional TCP slow start and fast recovery algorithms by speedy start and speedy recovery. With speedy start, a TCP-Swift sender opens up its congestion window in only two round trip times. This signiJicantly shortens the tinie needed in probing the network for equilibrium state. With speedy recovery, we can infer the cause of a packet loss by observing the ACK stream received at the sender. lfthe loss is due to wireless transmission error, the sender's congestion window can be reopened up more aggressively to fully utilize the available satellite link bandwidth. We show that TCP-Swift outperforms existing TCP schemes by simulations.

A new TCP Bandwidth Estimation protocol for satellite networks

“…TCP Jersey [6]: TCP version based on the Westwood scheme, but with a different estimator and with the capability of distinguishing the cause of losses owing to a specific router configuration. TCP Peach [16] (TCP Peach+ [17] and TCP Swift [18]): protocol with two new Slow Start and Fast Recovery algorithms to have a new congestion control scheme with good performance in satellite networks. In [20] authors discuss the performance of TCP-Vegas in Slow Start phase and propose a new pacing method to solve the problem.…”