《linux TCPip stack ns2 implementation》.pdf

NS-2 TCP-Linux: An NS-2 TCP Implementation with Congestion Control Algorithms from Linux David X. Wei Pei Cao Department of Computer Science Department of Computer Science California Institute of Technology Stanford University davidwei@ cao@ ABSTRACT Keywords This paper introduces NS-2 TCP-Linux, a new NS-2 TCP NS-2, TCP, Congestion Control, Linux implementation that embeds the source code of TCP con- gestion control modules from Linux kernels. Compared to 1. MOTIVATION existing NS-2 TCP implementations, NS-2 TCP-Linux has The TCP modules in NS-2 [7] were originally based on three improvements: 1) a standard interface for congestion source code of the BSD kernel in the 1990s. Over the years, control algorithms similar to that in Linux 2.6, ensuring bet- NS-2 TCP modules have tremendously helped the research ter extensibility for emerging congestion control algorithms; community to analyze and understand TCP behavior, and 2) a redesigned loss detection module (i.e. Scoreboard) that led to the development of several new congestion control is more accurate; and 3) a new event queue scheduler t