OPNET Technologies
7255 Woodmont Avenue 
Bethesda, MD 20814
Tel: 240-497-3000
Fax: 240-497-3001
E-mail: university@opnet.com
Web: www.opnet.com 

OPNET is a registered
trademark of OPNET Technologies
© 2001 OPNET Technologies

1. Courses Using OPNET 

TP505 - Petri Network
Basic definitions; Models; Proprieties; Reach tree; Analysis of Petri Network by: marks plot, matrix equations and reductions; Colored Petri Network; Temporal parameters; Temporized Petri Network; Petri Network with temporization; Communications protocols. Simulations.

TP519 - Performance Analysis of Telecommunications Network.
Initial Concepts. Introduction to Queue theory: Queue models; Queues with single sever; Queue with multiples server; Queue with priority; Queue networks. Performance analysis and design of package switch network. Introduction to trustful networks. Laboratory simulations with Opnet Modeler.

TP520  - High Speed Telecommunication Network. 
Part I: ATM Network - Initial concepts. ATM Network architecture. ATM Network layers: function of each layer and a detailed description of the operation in each layer. ATM Switches. Signaling and routing in the PNNI. Traffic control. Call admission control. IP and ATM Interconnection. Frame Relay and ATM interconnection. Voice over ATM. Management Principles in ATM network. Simulation of ATM network using the Opnet Modeler software.
Part II: SDH networks - Principles of the PDH networks. Introduction to SDH. Transport capability, frame structure and multiplex in the SDH networks. Signals mapping in the SDH network. Synchronism in the SDH network. Equipment of the SDH network. Architecture and design of SDH networks. Availability in SDH network.

TP524 - Optimization Methods applied to Telecommunications.
Planning principles and Design of telecommunications networks. Historic of optimization applied to telecommunications. Main Brazilian efforts: UNICAMP, CPqD and UFMG. Telecommunication companies; Examples of optimization application in telecommunication: in the network access, in the switch nodes, in the cellular networks and in the backbones. Problems modeling: mathematical models of optimization in telecommunications. Linear and by parts programming techniques; Network throughput; Integer programming technique. Study of cases. Simulations using the OPNET Modeler.

TP 525 - Convergent Network
The evolution of the telecommunications networks to ISDN, the evolution of the package networks, Basic principles of the telephony by package; services of voice over IP; H. 323 recommendation: main components and main interfaces; Factors that are guiding of the demand of telephony by package; The SIP protocol; The IPv6 protocol; support to the mobility in IP network: Mobile IP and SIP/IPv6; The MPLS standard; Virtual private network; VPN_IP over MPLS; Access network technologies in the context of convergence; network management structure: SLA, SLM, QoS, QoS in VoIP service; Integration with the legate systems; Main aspects of convergent network projects and traffic engineering.

TP526 - Multiple Access for Telecommunication Network
Introduction to basic protocols: multiple access with fixed allocation, random multiple access, multiple access with allocation by demand and centralized control, multiple access with allocation by demand and distributed control. Mobile communication network and wireless network. Satellite communication network. High speed network. Wireless local area network and ATM wireless network. Laboratory experiences using the Opnet Modeler.

TP527 - Network Management
Fundamental structures of management systems, overview of integrated management of networks and services, OSI and TMN management, methodologies for network management, SNMP protocol, MIB's structures, SNMP based management, MIB's RMON, RMON based management, Sniffer techniques, management of distributed systems, TINA architecture and services management, network management tools, network management laboratory using the OPNET Modeler. Study of case.

2. Developed Documents for OPNET

 OPNET_Tutorial.pdf
 lab_redes1.doc
 lab_redes2.doc
 lab_redes3.doc

3. Developed Papers Using OPNET

MENDES, L. L.; SILVEIRA, A. C. An Educational Approch for the Study of Computer Networks Using the Opnet. In: Congresso Brasileiro de Ensino de Engenharia, 2003, Rio de Janeiro - RJ, Brazil

Júnior, E. I.; GARCIA, A. S. A Proposal of  Methodology  for Analysis of  IEEE 802.11 Networks Performance  Combining SNMP Management and Simulation Tools. In: V Workshop de Comunicação Sem Fio e Computação Móvel, 2003, São Lourenço - MG, Brazil

4. Developed Thesis Using OPNET

Formal Modelling and Analysis of Some Functionalities of Transport Protocol through the Petri Nets. 
Author: Marcos Gilton Miranda Martins
Advisor: Adonias Costa da Silveira
Abstract:
This dissertation presents an approaching for studying, modeling and makes some analysis about functionalities of association of SCTP transport protocol. This protocol has been developed in the last five years by IETF. This protocol achieved a high level of efficiency and it has been considered a probable substitute for TCP and ideal to work with IPv6. The modeling and analysis are developed using a mathematical formalism called Petri nets, which is a tool employed in parallel and concurrent systems and its study is an important part of this work. Some computer implementation of Petri nets formalism called PAREDE and Design/CPN are used. These were chosen because they implement extensions of the Petri net basic theory and make possible its modeling, considering time and color properties, besides implement methods of formal analysis. The SCTP protocol models developed using Petri nets, provide some essential details to perform a functional behavior analysis and specific properties, like absence of deadlocks, synchronization, and correct sequences of messages, besides the SCTP official specification checking of consistency, the RFC2960.

Proposal of  Methodology  for Analysis of  IEEE 802.11 Networks Performance  Combining SNMP Management and Simulation Tools
Author: Egídio Ieno Júnior
Advisor: Anilton Salles Garcia
Abstract:
This dissertation presents an approaching for studying, modeling and makes some analysis about functionalities of association of SCTP transport protocol. This protocol has been developed in the last five years by IETF. This protocol achieved a high level of efficiency and it has been considered a probable substitute for TCP and ideal to work with IPv6. The modeling and analysis are developed using a mathematical formalism called Petri nets, which is a tool employed in parallel and concurrent systems and its study is an important part of this work. Some computer implementation of Petri nets formalism called PAREDE and Design/CPN are used. These were chosen because they implement extensions of the Petri net basic theory and make possible its modeling, considering time and color properties, besides implement methods of formal analysis. The SCTP protocol models developed using Petri nets, provide some essential details to perform a functional behavior analysis and specific properties, like absence of deadlocks, synchronization, and correct sequences of messages, besides the SCTP official specification checking of consistency, the RFC2960.

A Mathematical Modeling Proposal for Treatment of Traffic with Auto-Similar Characteristic.
Author: Oscavo Gonzaga Prata Júnior
Advisor: Anilton Salles Garcia
Abstract:
The traffic models applied in the past for design and performance analysis of the
telephony networks became inefficient due to the change in the statistical nature
of data traffic. This instigate the scientific/academic community to looks for
models that are capable to treat that new characteristic statistics of the traffic.
This document presents a proposal of mathematical model capable to represent
the self-similar feature of the traffic of the current networks. The intended model
uses the Pareto distribution with Hurst parameter to characterize the package
interarrival time. Consequently, it is presented the relevant for variable of location
for Pareto distribution modelling self-similar traffic. We also present a study
using the proposed model for classic queue theory.

5. Thesis That are Being Developed Using the OPNET Modeler

Resilience in a multlayer protocols
Author: Auder Nardi Bonora
Advisor: Anilton Salles Garcia
Abstract:
This dissertation is about multlayer protocols. With this work we want to study more especially fault tolerance or resilience. When we have multlayer protocols like: IP over ATM over SDH over WDM or IP over MPLS over SDH over WDM, etc. In a moment of a failure, in what layer is faster to recover some data, in which layer we have more efficient, or in which layer in cheapper to work with this problem, etc. Our proposal is to use OPNET to evaluate this kind of asks with simulation.

Methodologies to analyze the quality of service in network access structures.
Author: Eduardo Garcia Pina
Advisor: Anilton Salles Garcia
Abstract:
The objective of this thesis is to study the network access protocols and to develop a valuation methodology for quality of service when these protocols are combined in a network structure. Some computational experiment will be realized to validate the methodology presented.

Pragmatic methodology for the analysis and management of the performance in a computer network.
Author: Edson Josias Cruz Gimenez
Advisor: Anilton Salles Garcia
Abstract:
The expansion of data communication networks has created the necessary conditions to the important information's integration to the companies, allowing to speed up its transactions and making possible the growing negotiation among these companies. Then, the day-by-day of these companies has become more and more dependent on its corporate networks. The perfect management and follow-up of this environment becomes vital. It's  necessary the techniques' use and management's tools that used properly, will give support not only to the network's operation, but also to the adequacy's processes of them. According to this context, this work analyses the main topics associated with the theory and practice of the Computer Networks Management, with the main focus on Performance Management. It's proposed a pragmatics approach to the analysis and the management performance in corporate networks, which imply the use of tools set able to make possible the follow-up, the control, and the capability's plan in information technology's environment. To become effective this methodology a use case was performed emphasising the performance analysis of the main environment segments of INATEL-Telecommunications National Institute 's corporate network.

Performance Analysis of Active Queue Management Algorithms using OPNET Modeler.
Author: Eduardo Giacomin Pimentel
Advisor: Antonio Marcos Alberti 
Abstract: 
The objective of this work is to analyze and compare the performance of different Active Queue Management (AQM) algorithms using the OPNET Modeler simulation environment. The problem of offering QoS guarantees to a very diverse set of applications while maximizing network resources usage is one of the most relevant problems being discussed today in telecommunication networks area. In this scenario, congestion control protocols have a very important role. Therefore, this work aims to compare the performance of the best candidates algorithms and identify the key aspects, metrics and results required for these protocols.

Ethernet over SONET/SDH
Author: Bruno de Oliveira Monteiro
Advisor: Antonio Marcos Alberti 
Abstract: 
There is a considerable interest in using Ethernet over SONET/SDH (EoS) for Ethernet transport over wide area networks. However, actual deployments of EoS have encountered some challenges, mainly related with transport, management, standardization, traffic management, traffic grooming and traffic admission control. Therefore, the objective of this thesis is to study the approaches being developed for EoS. The main concerns and challenges related with the candidate technologies will be investigated. A qualitative analysis and comparison of the most relevant approaches will be done. Also, the possibility to do a simulation based performance comparison using OPNET Modeler will be investigated.

A Simulation Based Performance Evaluation of Diffserv Networks
Author: Carlos Henrique Vicentini Gomes
Advisor: Antonio Marcos Alberti 
Abstract: 
Architectures for Internet quality of service (QoS) have been under discussion for over a decade and, with the exponential grow of the Internet, approaches like Differentiated Services (Diffserv) have been developed. On the other side, technologies like MPLS appeared to improve the performance of traditional router and to aggregate Internet traffic over switched networks. However, the problem to offer end-to-end QoS guarantees while maximizing available network resources still remains open in a Diffserv approach. Additionally, the problem becomes even more complex when the Diffserv approach is considered in the context of a MPLS network. In this scenario, a simulation based performance evaluation is very useful to determine which are the main drawbacks in these networks; identifying key aspects, metrics and requirements desired for network traffic management algorithms. This performance evaluation will be done in OPNET Modeler.