Study of Different TCP Protocols in Wireless Network

Abstract

Today’s world is extremely dependent on the internet, and so as a result, the usage of the internet in all aspects of our life is rapidly rising. The congestion control algorithm is a crucial component of TCP, and it was built on the idea that packet loss is generally relatively minimal, and that packet loss is consequently an indicator of network congestion. The congestion control algorithm used by a specific version of TCP determines its performance characteristics. This thesis will give an overview of different TCP variants, and their characteristics in the wireless network. In this paper, we have experimented with four TCP variants (TCP CUBIC, TCP Vegas, TCP Yeah, TCP Westwood Plus) and noticed their performance for increasing nodes. For the increasing nodes, the throughput decreases. The performance of TCP protocols are experimentally evaluated with an implementation in Linux using Network Simulator Version-3 (NS3). We have chosen the desired file of wifi-tcp.cc from NS3 and edited it according to our experimental need. The performance of throughput in CUBIC gives the best result according to our simulation.