Analytical Research of TCP Variants in Terms of Maximum Throughput

Abstract— This paper is comparative, throughput analysis, for the TCP variants as for New Reno, Westwood & High Speed, and it analyzesthe outcomes in simulated environment for NS -3 (version 3.25) simulator with reference to multiple varying network parameters that includes network simulation time, router bandwidth, varying traffic source counts to observe which is one of the best TCP variant in different scenarios. Analysis was done using dumbbell topology to figure out the comparative maximum throughput of TCP variants. The analysis gives result as TCP Variant “NewReno” is good when low bandwidth is used, while TCP Variant “HighSpeed” is good in terms of using large bandwidths in comparison to Westwood. Network traffic flow was observed in NetAnim tool.

Keywords— Network Topology, TCP Variant, Router, Bandwidth, Simuation Time.

INTRODUCTION

TCP (Transmission Control protocol), is a transport protocol, which is one of the best reliable protocol used in www service, mail and ftp over internet. This is reliable as it provides packet transfer from one host to other with acknowledgment over network .congestion control is the best and important feature for TCP in terms of performance measurement. The main question of Controlling Congestion over the network ( Less packet loss) has shifted to how possibly use the network capacity more efficiently, and here TCP variant‟s role come in picture as using different topology in different variants how throughput differ slightly. Many of the TCP variant has been introduced out of which we will analyse the comparative performance among NewReno, Westwood and HighSpeed.

We will provide analytical research of maximum throughput among above variants with reference to Network Bandwidth, Simulation Time and also with varying number of source count and will figure out the best scenarios for best throughput. While TCP is important protocol, a part of protocol standards known as TCP/IP, TCP reside at the upper side of IP layer, and to process further it pass the segments to IP layer, which subsequently processed through the lower layers and passed to network.
Read More