Landmark Routing (LANMAR) for Mobile Ad-hoc Network
We have published a paper on this joint development effort with DSTA (Defence Science & Technology Agency) which was published in the OPNETWORK 2005 Proceedings.

Abstract

Download our paper

Optimum Deployment of Single-Pair High Speed Digital Subscriber Line(G.SHDSL) Technology Through OPNET Simulation Models and Testing
With defined line parameters, DSLAM OPNET models & ATM profiles at the ATM switch were developed in OPNET Simulation environment. The models were tested with various G.SHDSL CPEs(with routing capability features supported) to determine the CPE features and capabilities. With various OPNET simulation scenarios, the performances of various line speed were analysed. A test bed was set up to test the actual copper loop to determine the G.SHDSL line selection critiria. Included in the testing was an application testing using ping and through FTP server.

OPNET Simulation of 802.11a/b/g Wireless Campus Network
Building on the existing WLAN DCF vs PCF network models, we built the OPNET WLAN models according to the specifications of some WiFi products in our NYP campus wireless LAN network. The simulation results were gathered and compared to actual load testing done on-site. Simulation were also done to find out which network configuration gives the best throughput which will be used to facilitate our future WLAN Network planning.

Conduct in-house course on OPNET and protocol simulation for internal staff.
We have conducted Network Simulation training and uses OPNET as a platform in our training. The training is extended not only to our full time students, but also we conduct a one day appreciation course on OPNET simulation and network protocol model development. The OPNET tutorial has been designed to introduce the basic of using the OPNET Modeler Software.

New Module using OPNET
IT0207 - Network Planning & Design a new module conducted by Mr Foo Yong Wee start with an in-depth coverage of structured cabling system; this module leads participants to a set of general guidelines for designing networks, specific suggestions for several key networking implementations, network model building and simulation process using OPNET Modeler software, and explore systems integration strategy, planning and performance analysis of various InfoComm infrastructure design.

Protocol Models for Layer 2 of HiperLAN2
Some simulation models through OPNET were created for Layer 2 of HiperLAN2 with an objective to look at its superior QoS performances when the number of users is high. The models were also used in the support of testing of new HiperLAN2 product

Protocol Models for Layer 2 of IEEE802.11a
Few models have been created based on the MAC and LLC layers of 802.11a WLAN with an objective to simulate the performances of these two layers. These models were used to support the development of WLAN protocol tester, and performance studies of 802.11a WLAN environment

Performance Evaluation Wireless LAN through Simulation and Measurement Techniques
Wireless LAN (WLAN) models based on installed campus WLAN environment were created. Performance studies based on e-learning, intranet, and video services and applications were done through OPNET simulation and measurement techniques. Performance parameters such as BER, packet loss, S/N at the physical layer, network utilization, packets error rate at network layer and applications response time and throughput were investigated in the project. Other test done include interference effect, number of stations/access points, practical range and etc were also performed.

A Unique Deployment Model for IEEE 802.11b and 802.11a through Simulation Studies
OPNET simulation tool is used to verify a deployment model for 802.11b and 802.11a WLAN. The deployment model has the benefit of helping vendors, industrial professional and users to get an insight of the performance of their WLAN before installing network equipment and performing testing. The simulation models created supports the finding of performances of WLAN in various setting such as different floor layout, number of access points, number of users to be supported, various services and etc.

Estimating the Available Capacity of an ATM Connection
The capacity measurement of an ATM connection across an ATM switch or multiple ATM switches is useful to many applications. Its applicability include the congestion control mechanism, connection admission control, QoS performances and others. In this project we define the available capacity and create a ATM network model using OPNET simulation tool and measure the available capacity of a Virtual Path connection through this model. The preliminary result shows that using an ATM switch is sufficient in estimating the available capacity instead of through multiple ATM switches. The results based on the measurement at the endpoints of the switch for various changing cross traffic pattern yields some positive results and will be used to compare with some traditional methods of purely looking at throughput, cell losses and etc.

A Performance Comparison of Gigabit Ethernet and ATM based Campus Network
Building on the existing ATM campus network model, further analysis on how the QoS parameters being affected by different service classes (e.g. CBR, VBR, ABR etc.) for the developed model are carried out. A Gigabit switched based network model on the existing School network structure will be created in order to compare the performances with the ATM-based model developed earlier. These two models will be used eventually to support the study of ‘What if’ scenario if our ATM switches are replaced with Gigabit switches. Various load patterns based on an estimate of our e-learning, e-mail, intranet applications are done to look at the performance trends and compare with the measurement done using ATM tester and protocol analyzer. The model has also provided a practical and realistic platform for network training in supporting our Diploma courses.

Currently, some network fault scenarios are defined to look at the possibility of using the network model to assist in understanding the phenomenal and symptoms if the network is facing some problems.

Development of An ATM Campus Network Model for Performance Analysis
A network model is a model designed to allow the study, evaluation, comparison and analysis of various issues related to network performance. In this project, an ATM network model based on the Polytechnic's School of Engineering network architecture is created using the OPNET modeler. The developed network model is used eventually to support the study of applications and ATM cell layers performances of the School network. The model also provides a practical and realistic platform for network training in supporting the Diploma courses.

The developed model shows how different load and traffic patterns in the network affects the network performance. The performance parameters being investigated include the response time and throughput in the application layer as well as the cell delay, cell delay variation, and cell loss rate in the ATM layer. The results obtained have demonstrated that there are a very close correlation between QoS requirement specified by a customer at the application layer and the performance parameters investigated at the ATM layer.

Some of the results obtained are also tested and verified as far as possible using the switches and equipment in our lab.

Courses Using OPNET
EG3158 - Network Management & Troubleshooting are final year network specialisation courses instructed by Wayne Kan for the engineering students. OPNET are used in the curriculum for Network Modeling and Simulation.

Specialised Courses on Mobile Ad-hoc Network (MANET) are conducted for the industries . OPNET is used to illustrate some of the work we have done in the research and development of MANET routing protocols, as well as to illustrate MANET routing.

IT3829 - Broadband Communications & Networking and IT3830 - Network Management & Troubleshooting are final year network specialization courses instructed by Ang Khoon Wee and Foo Yong Wee respectively.

IT3829 covers the different aspect of broadband communications in the area of switching and standards, in particular the broadband architecture, services, technologies, performance evaluation, measuring and testing techniques, etc. It provides a view of ISDN, Frame Relay and current broadband network technology like ATM, SONET, Optical Network. With the emphasis on ATM technology, it touch on switch architecture, network planning, switch configuration, performance analysis, and traffic control. Projects follows ATM switches, Virtual Path capacity estimation, traffic congestion and control algorithms. OPNET is the recommended simulation environment providing a performance evaluation for network components related with the projects.

IT3830 covers the local area network and router technology with emphasis on network management, network troubleshooting, network security, network planning, network modeling and simulation. The performances of Ethernet, Fast Ethernet, Gigabit Ethernet, Token Ring, FDDI, and others are also covered. Projects follows IP switching routers, network capacity planning, and IP network performance study. State of the art network protocol analysers, network management tools and OPNET are used in supporting this course. OPNET is the essential tool used in guiding students to learn network modeling, simulation and performance analysis.

Student Work :-

Application Performance Analysis Over IP network Based On RIP & OSPF Routing Protocol

Class Syllabus