OPNET Technologies
3400 International Drive, NW 
Washington, DC 20008
Tel: 202-364-4700
Fax: 202-364-8554
E-mail: university@opnet.com
Web: www.opnet.com 

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© 2000 OPNET Technologies

Voice over IP in a Wireless LAN Environment
This project focuses on OPNET simulation of Voice over IP applications on the NSF sponsored wireless campus area network at the Center for Wireless Information Network Studies, Worcester Polytechnic Institute, Worcester, Massachusetts.   The objective of the modeling is to compare the empirical results from the measurement system operating on the testbed with the results of simulation from OPNET.   The testbed can only provides results associated with less than six users and the results are based on the router and switch operating with IPv4.  The OPNET simulation results intend to shed light on the cases were the number of users are larger and the system employs IPv6. The simulation specifically analyses delay, delay jitter, and packet loss characteristics.  The project is conducted by Jeff Feigin, an MS candidate in the ECE department, as a part of his MS thesis supervised with Professor Pahlavan.  The project is sponsored by Nokia, Finnish Air Force, and TEKES in Finland.  Results of this project are presented in:

1.  J. Feigin, K. Pahlavan, and M. Ylianttila, "Hardware-Fitted Modeling and Simulation of  QoS of VoIP over a Wireless LAN", IEEE VTC'2000, Boston, Sep. 2000. 
2.  J. Feigin, "Voice over IP in a Wireless LAN Environment ", Master's Thesis, Worcester Polytechnic Institute, Worcester, MA, Jan. 2000.

Courses Using OPNET 
CS525W/EE539S: Mobile Data Networking is a graduate course instructed by Prof. Kaveh Pahlavan. The course describes the elements of mobile networks: air interface, mobility infrastructure, and connection to Internet. Impact of mobility on the ISO layers. This course is a parallel to the EE 538: Wireless Information Networks designed to address those interested in the CS and ECE. While EE 538 focuses on the signal processing aspects of the wireless networks this course will put emphasis on the networking issues.  The introduction of OPNET is used for evaluating network behavior pertinent to mobile networking.