Performance Analysis and Quality-of-Service Monitoring of Protected and Unprotected TCP Networks Using NCTUns Simulator

The research trends in computer and wireless communication networks are growingly facilitated with the emergence of various Network Simulation tools. Network simulation software enables users to model network behavior demonstrating the packet transmission behavior and interaction amongst the nodes. These models are further used to analyze and predict the behavior of a computer network on various devices such as links and applications. Network Simulators also permit these network topologies to be studied and tested on several popular protocols such as WLAN, Wi-Max, TCP, WSN, cognitive radio. This paper analyses the performance and quality-of service of packet flow in TCP networks in VANET using novel network simulator and emulator known as NCTUns. The investigation and study of various VANET topologies is facilitated by NCTUns architecture, simulation methodology, functional design and execution steps. NCTUns offers a series of advantages over other contemporary network simulators where the outcomes of diverse quality of service (QoS) and resource management and schemes implemented on higher-layer protocols can be easily studied. Most importantly, NCTUns allows testing of time-consuming, complex or extravagant topologies without emulating them using hardware. This paper reviews Diffserv model used for monitoring packet flows in TCP architecture and gives an insight into the analysis of such networks.