Analyzing the Voice over Internet Protocol (VoIP) on a campus sized computer network using the OPNET Modeler simulation

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Acknowledgement

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Declaration

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Abstract

In converging IP, fixed and mobile networks, applications of multimedia have been the chief motivating factor. Within the realization of this convergence, a main obstacle is achieving QoS (Quality of Service) from a best-effort, heterogeneous network of service. Stringent limits are required by interactive voice on packet losses, delay and jitter, video puts in considerable requirements of band width to the network, whilst internet merely makes its preeminent attempt for delivering a packet. Therefore, the end to end Quality of Service management of heterogeneous network sustaining the services of multimedia is of supreme significance. This study offers multimedia applications' performance study over the networks of 802.11 in the networking environment of a campus sized computer network. Particularly, we examine the VoIP applications' Quality of Service performance over campus sized computer network, whilst sharing the resources of network with video applications and HTTP. Through the Utilization of the OPNET simulator, we conjure up numerous pragmatic scenarios of application traffic and examine the performance of network through assessing the parameters of Quality of Service, which include packet loss ratio, MOS, jitter and delay.

Table of Contents

ACKNOWLEDGEMENTII

DECLARATIONIII

ABSTRACTIV

CHAPTER 1: INTRODUCTION3

1.1 Modeling and Management of Quality of Service, and Quality of Service Enabling Architectures:4

1.2 The Applications and Network:6

1.2.1 The Network Architecture:7

1.2.2 The Network Applications:8

CHAPTER 2: LITERATURE REVIEW10

2.1 Configurations of VoIP:10

2.1.1 Dedicated VoIP phones:10

2.1.2 Software-controlled VoIP applications- “soft phones”:11

2.1.3 Adapters (USB):11

2.1.4 Dedicated routers:11

2.2 Service Limitations, Requirements, and Availability12

2.2.1 Accessibility because of bandwidth:12

2.2.2 Accessibility because of power outages:13

2.2.3 Requirements:13

2.3 What could go wrong with VoIP?13

2.3.1 Delay and jitter of network:14

2.3.2 Packet loss:15

2.4 Synopsis of Voice over Internet Protocol and quality metrics:16

2.5 OPNET Modeler:19

2.6 Campus Sized Computer Network:20

CHAPTER 3: METHODOLOGY21

3.1 Rationale for a Qualitative Study:23

3.2 Philosophical Framework or Paradigm:23

3.3 Search Technique:24

3.4 Literature Search:24

3.5 Inclusion and exclusion criteria:25

3.5 Search terms - key terms:26

3.7 Additional Online searches:26

3.8 Management:26

3.9 Search rationale:26

3.10 Critical Appraisal tool:27

3.11 Appraisal limitations:27

3.12 Ethical Considerations:27

CHAPTER 4: RESULTS AND DISCUSSION29

4.1 Fixed Settings for Campus Sized Computer Network:30

4.2 Varying the Campus Sized Computer Network Environment:34

CHAPTER 5: CONCLUSION39

REFERENCES41

APPENDIX43

Tables:43

Diagrams:47

Figures:49

Analyzing the Voice over Internet Protocol (VoIP) on a campus sized computer network using the OPNET Modeler simulation

Chapter 1: Introduction

In converging IP, fixed and mobile networks, applications of multimedia have been the chief motivating factor. Within the realization of this convergence, a main obstacle is achieving QoS (Quality of Service) from a best-effort, heterogeneous network of service. Stringent limits are required by interactive voice on packet losses, delay and jitter, video puts in considerable requirements of band width to the network, whilst ...