Performance of Step Network Using Simulation Tool

—Nowadays distributed computing approach has become very popular due to several advantages over the centralized computing approach as it also offers high performance computing at a very low cost. Each router implements some queuing mechanism for resources allocation in a best possible optimize manner and governs with packet transmission and buffer mechanism. In this paper, different types of queuing disciplines have been implemented for packet transmission when the bandwidth is allocated as well as packet dropping occurs due to buffer overflow. This gives result in latency in packet transmission, as the packet has to wait in a queue which is to be transmitted again. Some common queuing mechanisms are first in first out, priority queue and weighted fair queuing, etc. This targets simulation in heterogeneous environment through simulator tool to improve the quality of services by evaluating the performance of said queuing disciplines. This is demonstrated by interconnecting heterogeneous devices through step topology. In this paper, authors compared data packet, voice and video traffic by analyzing the performance based on packet dropped rate, delay variation, end to end delay and queuing delay and how the different queuing discipline effects the applications and utilization of network resources at the routers. Before evaluating the performance of the connected devices, a Unified Modeling Language class diagram is designed to represent the static model for evaluating the performance of step topology. Results are described by taking the various case studies. I. INTRODUCTION N the present scenario, distributed computing is widely adopted by many researchers for computation of parallel execution of tasks in optimum time period as it represents the autonomous collection of heterogeneous systems interconnected through heterogeneous network. The devices may be computer system, mobile system, laptop, tablet and other types of handheld devices. Various kinds of topologies are studied by distributed computing approach and according to Coulouris et al. [1], distributed system is an autonomous collection of heterogeneous devices communicating with the help of message passing technique. The characterizations of distributed system, system model, inter-process communication, web services, security issues in distributed system and designing of distributed systems are described by the authors. Hwang [2] has described architecture of various computer models, program behavior, architectural choices, scalability, programmability, performance issues related to parallel processing, designing high-performance computers, supporting software and applications for distributed and parallel computing. Network topologies are one major building block for data communication and Wahlisch [3] described how network entities …