Measurements of TCPW ABSE Fairness and Friendliness

TCP Westwood (TCPW), is a TCP protocol with a sender-side modification of the window congestion control scheme. This protocol is intended to act in packet lossy environments. It relies on a continuous estimation, by the traffic source, of the connection packet rate based on the ACK reception rate. And this in order to compute the congestion window and the slow start threshold settings after a congestion episode. Given that it has been yet established through experimental and simulation studies that TCPW exhibits significant improvements in throughput performance over Reno in various environments, we are focusing in this paper on TCPW performance measurements with respect to throughput, fairness and friendliness towards TCP New Reno in a wired LAN and in the Internet. Which constitutes a proceeding of a set of measurements achieved on TCPW in similar environment. In this paper we present the results of some experimentations carried out in the CRSITAL Laboratory with a FreeBSD TCPW ABSE protocol implementation.