The Most Important Aspects Of The Internet Information Technology Essay

Voice services is one of the most rising engineering that is widely used everyplace in todays universe. This voice services is installed in the web with the aid of VoIP. This application has been working on frame relay, conventional IP and ATM webs. Nowadays there are besides some MPLS webs run this application. Compared to all the engineerings MPLS engineering is most suited for implementing real-time application such as voice and picture. Here in this thesis public presentation measuring of VoIP services is compared in ATM web and MPLS web. OPNET Modeler 16.0 is a web simulator used for the comparing of both the webs. The following prosodies such as Voice package End-to-End hold, Voice Jitter, Voice packages sent and received are used for analysing the public presentation. After analysing the simulation consequences it shows that MPLS web performs good than ATM web by diminishing the End-to-end hold and Jitter.

KEYWORDS: Voice over Internet Protocol ( VoIP ) , Internet Protocol ( IP ) , Asynchronous Transfer Mode ( ATM ) , Multiprotocol Label Switching ( MPLS ) , Optimized Network Engineering Tool ( OPNET ) , hold, jitter and package loss.

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1. Introduction

Internet is one of the most of import facets in today ‘s universe. No plants are done without the cyberspace. Many people all around the universe usage cyberspace in their daily life for carry throughing their demands. Due to this enormous usage of cyberspace, the existent clip applications such as telecasting and telephones are utilizing the cyberspace. For the past several old ages, the web that sends voice packages performs slower than that of informations webs. So to get the better of this voice webs sends the packages in the signifier of informations to increase the velocity, dependability and informations loss in the webs. After some old ages even this technique became failure due to high informations traffic. Hence to work out this job Voice over IP, Voice over ATM and Voice over MPLS are used. Presently we are utilizing three chief engineerings for routing such as IP, ATM and MPLS based routing.

There are several public presentation measurings done with conventional IP webs that prove they are in taking when compared to other webs this is because of their progress characteristics and techniques. Even though Conventional IP webs are the best but they are non good for the real-time applications such as picture and voice due to their best-effort services. Hence to get the better of this ATM and MPLS webs are used for the real-time applications. MPLS is an emerging engineering for the hereafter networking that provides QoS, Traffic Engineering, Speed, Scalability and Reliability when compared to that of ATM and other webs. The MPLS web elements, their designs and their architectures are different from ATM webs.


The chief purpose of this thesis work is to compare the public presentation of real-time voice traffic in ATM and MPLS webs.

The techniques of implementing VoIP applications and its engineering in the webs have been scrutinized through the literature survey.

Analyzing about ATM and MPLS routing techniques and analysing their progresss with the real-time voice traffic is through the literature survey.

The jobs of VoIP application when implementing in the ATM webs and how it is overpowering in the MPLS webs have been analyzed through the literature survey.

Planing two web theoretical accounts in the web simulator, both holding the same web topology.

The public presentation prosodies such as voice end-to-end hold, voice jitter, voice packages sent and received are solicited from the simulator.

All the consequences are examined and shown diagrammatically.


The chief range of the thesis is to direct the execution of VoIP services in MPLS webs is best instead than implementing in ATM webs. This study apprise the elaborate description of public presentation of the webs, routing techniques used by the webs, functionalities, design, architecture and parametric quantity prosodies used in the webs. The parametric quantity prosodies such as voice end-to-end hold, voice jitter, voice package sent and received are the chief things used for this thesis, these parametric quantities clearly shows the behavior of both MPLS and ATM webs towards VoIP application. This thesis tells the cardinal and indispensable information of MPLS and ATM webs that are used for the execution of VoIP application. The profound information about the algorithms, routing protocols, packages sent and received, encoder layout of the VoIP application used by both MPLS and ATM webs are non considered in this thesis.


The expected results of this thesis are that the simulation consequences of both the webs obtained from the OPNET Modeler 16.0 which shows the graphical representation of public presentation prosodies such as voice end-to-end hold, voice jitter, and voice packages sent and received. These graphs reveal that MPLS web victory over ATM web in presenting the voice packages.


The method used for finishing this research successfully is that the background survey of books and documents related to MPLS, ATM webs and VoIP application. To demo the consequences OPNET Modeler 16.0 simulator is used and to utilize this simulator and its tools a background survey of the merchandise faculty has been made. Using the Modeler both MPLS and ATM webs is built with voice traffic and other background traffics. The graphical end product of the simulator shows the public presentation prosodies of voice traffic with MPLS and ATM web. It besides shows the public presentation of other background traffics included in the webs.


In [ 1 ] , the writer compared the public presentation of IP, ATM and MPLS webs implementing FTP, VoIP and Video applications in the webs and proved ATM and MPLS webs has a better public presentation on the whole than the IP web.

The paper [ 1 ] explains the drawbacks of IP webs when implemented with the real-time applications such as speaking, watching Television and picture conferencing over cyberspace. It proved that ATM and MPLS webs outperforms than IP web in footings of hold and response clip got from the consequences utilizing the OPNET simulator.

In [ 2 ] , the writer compared the public presentation of Conventional IP and MPLS webs implementing VoIP application in both the webs and proved MPLS web performed better than that of IP web.

The paper [ 2 ] explains the techniques that are to be considered while implementing the voice traffic in the webs. The paper explains the routing techniques of both the webs and sing Traffic Engineering ( TE ) in MPLS web. It besides explains the figure voice calls that can be made at a peculiar clip for efficient QoS. The paper eventually proved that MPLS performed better than IP web by analysing the graphs obtained from OPNET Modeler 14.5.

In [ 3 ] , the writer recommends some of the web demands that can be used for the execution of VoIP over MPLS.

The paper [ 3 ] explains in item about the MPLS and QoS for implementing VoIP in the existent web including the traffic technology in MPLS. It besides explains briefly about the signalling protocols such as Constraint based Routing Label Distribution Protocol ( CR-LDP ) and Extensions to the Resource Reservation Protocol ( ERSVP ) used by MPLS traffic technology.

In [ 4 ] , the writer explains the factors that impacting the address quality of VoIP in traditional circuit switched webs such as Public Switched Network ( PSTN ) .

The paper [ 4 ] besides analyses some of the coding techniques that can be used for bettering the efficiency of package channels in the web chiefly sing the address codec. The paper concludes that VoIP performs good with the PSTN web.


In the above mentioned documents, the writers performed a comparing of Conventional IP, ATM, PSTN and MPLS by analysing the VoIP application reaction with all these webs. They worked with OPNET simulator and proved MPLS web performs good when compared to other webs, but the webs designed in the above documents have less background traffic and the velocity has high informations rate so that the packages can easy flux through the web. These webs while implemented in the existent universe holding the high background traffics will confront several jobs. With this type of topology it can be clearly stated that MPLS web outperforms the other webs.

In this thesis the public presentation of VoIP services have been compared with ATM and MPLS webs with the web topology holding high background traffic and lines linking assorted constituents of the web have been changed. The OPNET simulator is used for planing the webs. This is carried out by analysing the public presentation metric such as voice end-to-end hold, voice jitter and voice package sent and received which is obtained by the OPNET simulator. Using these prosodies the reaction of both webs in implementing VoIP application can be clearly analyzed. The topology designed for both the web is same it has the same bandwidth lines, same background traffics and the same figure of web elements, but it differs merely with the constituents used by each web. The necessary of presenting MPLS and ATM are non hide the IP but MPLS and ATM are merely the protocol added to IP to work more expeditiously. For illustration, in instance of voice traffic they can be used to cut down the hold, jitter and loss of the packages in the web.


The model of this thesis is divided into different chapters. The subject of the chapters are mentioned below,

Chapter one is the general debut about the thesis.

In the 2nd chapter, we discuss briefly about the VoIP application.

In the 3rd chapter, we discuss briefly about ATM and execution of VoIP application in the ATM web.

In the 4th chapter, we discuss briefly about MPLS and execution of VoIP application in MPLS web.

In the 5th chapter, we discuss about the simulator that is used and why preferring OPNET simulator. We besides discuss about the design of ATM and MPLS webs and implementing VoIP application in both utilizing OPNET simulator.

In the 6th chapter, we discuss and analyze about the consequences obtained from the OPNET simulator.

In the 7th chapter, we conclude the thesis and discourse about the hereafter work.

5 Simulation


The webs that are traveling to be implemented in the existent word can be designed and analyzed with the aid of web simulators. This is referred to as simulation. There are assorted types of web simulators such as OPNET Modeler, JiST/SWANS, Cnet, OMNet++ and NS2. Among the several simulators OPNET Modeler, OMNet++ and NS2 are most popular web simulators that are widely used in assorted Fieldss such as organisations, industries and other educational establishments.


OMNet++ is a web simulator which has the constituents programmed in C++ . These constituents are so assembled into larger constituents. It is utilizing a high-ranking scheduling linguistic communication known as NED which is hard to understand. Lots of web based paperss, tutorials, white documents and background surveies are required to work in this simulator. Furthermore it works expeditiously merely with INET model. [ OMNet++ ]


NS2 is an unfastened beginning web simulator that is used for planing and execution of the webs. Even though it is an unfastened beginning it does non supply any proficient support plan. It has an unfastened beginning codification called OTcl that can merely be used in UNIX runing system. It is besides possible to put in NS2 in windows runing systems but it works expeditiously merely in UNIX runing systems. The chief disadvantage of this simulator is that one should cognize OTcl linguistic communication and understand it clearly to plan a web. [ Compare ]


OPNET Modeler is the best web simulator that is widely used. It is a tool from OPNET engineering suite. Even this simulator is an unfastened beginning for academic research and instruction. Students can acquire proficient support instead in NS2. It works expeditiously in all operating system supplying different degrees of patterning that depends upon the user demands for building a topology. The chief advantage of this Modeler is that it ‘s Graphical User Interface ( GUI ) . It has many protocols, theoretical accounts, constituents, links and for about several 100s of special-purpose maps. The attractive characteristic of this Modeler is that no demand of cognizing any linguistic communications, one can merely plan the topology has required and consequences can be viewed diagrammatically. [ Reed op ]


In this thesis OPNET Modeler 16.0 is chosen for imitating the webs. The simulation consequences are obtained and they are analyzed for decision. The simulation is carried out in six stairss.

Measure 1: In the first measure a web topology is designed for both ATM and MPLS webs.

Measure 2: The voice traffic is sent from beginning ( Caller ) to finish ( Callee ) nodes.

Measure 3: The remainder background traffic are transmitted from other nodes to the waiter.

Measure 4: Once the topology is set, the simulation is ran for 2 hours.

Measure 5: The public presentation prosodies such as Voice End-to-End hold, Voice Jitter, Voice package sent and received are obtained diagrammatically after 2 hours of simulation.

Measure 6: On analysing the consequences provinces which web is more efficient for implementing VoIP application. The consequences of other background traffics are shown in the appendix.