Special Purpose Network Simulator for Transport Protocol Analysis

This paper presents a tool for evaluating transport layer congestion control schemes, including various TCP variants. In real computer networks, it is difficult to obtain detailed information about the internal state and operation of network protocols without disturbing protocol behavior. This is especially true for transport layer protocols where timing plays an important role. For deep analysis of protocol mechanisms, network simulation plays an essential role. This paper demonstrates a network simulator tool channel SimCast. This simulator focuses on the congestion control methods of the transport layer. Using this special purpose simulator, the effects of network topology and loss models can be investigated in detail. This paper presents a comparison of simulation results from SimCast to the output of other network simulators and real network measurements.