Performance Analysis of Reliable Internet Protocols (TCP) Using a Fixed Point Algorithm

The feedback nature of reliable Internet protocols can be represented by a fixed point algorithm (FPA). The network signals congestion based on the aggregate traffic offered to it and each source adjusts its sending rate based on the feedback from the network to reach the network operating regime. The algorithms of reliable (transport) protocols are based on this fact. The FPA has been one of the most useful ways of solving analytical models of Internet performance. Apart from implementing the FPA for sim-ple networks with few bottleneck links, no implementation algorithm of this complex procedure is given to the best of our knowledge. In this paper I develop an implementation algorithm of the FPA for ana-lytical models of the Transmission Control Protocol (TCP) which is the most widely used transport protocol on the Internet and show how the FPA emu-lates TCP. Even though the algorithm considers TCP it can be easily gener-alized to any reliable Internet protocol