Based on the study of HLA (High Level Architecture) and OPNET-HLA interface, the dynamic control of simulation process and the real-time update of simulation for LEO (Low-Earth-Orbit) satellite communication system were achieved on multiple computers. In the distributed interactive simulation, a satellite’s location is controlled, then the end-to-end delay time and the routing table of Iridium ...

1 Research Assistant of the Fund of Scientific Research – Flanders (FWO-Vlaanderen) 2 ESAT-Telemic participates in the OPNET University Program for research [7, 8, 9] and educational projects [10, 11, 12]. Abstract OPNET contains a vast amount of node models that represent specific types of networking gear available in the marketplace. These models closely resemble their real-life counterparts ...

In recent years, a lot of progress has been made in the field of networks and communications; and also in design of simulators. In this paper, we survey and review prominent fields where OPNET has been applied and compare it with other existing simulators. Our work helps beginners and researchers alike in estimating the useful features and limitations of OPNET and the state-of-art in network si...

Vehicular Ad hoc Networks (vanet) are a special kind of Mobile Ad-Hoc Networks (manet) adapted to the communications between vehicles. Several specific protocols to vanets have been developed to improve performances and satisfy vehicular application needs. To evaluate a protocol for vanet, some realistic mobility models are needed. Unfortunately, such models are not provided by Opnet Modeler. I...

Pseudo Random Number Generators (PRNG) are the base for stochastic simulations. The usage of good generators is essential for valid simulation results. OPNET Modeler a well-known tool for simulation of communication networks provides a Pseudo Random Number Generator. The extension of OPNET Modeler with external generators and additional statistical evaluation methods that has been performed for...

Wireless Networked Control Systems (WNCS) over Mobile Ad-hoc Network (MANET) is a new area of research and has many potential applications, for instance, military or rescue missions, exploring hazardous environments etc. For performance evaluation, researchers mostly rely on computer simulations as WNCS experiments are expensive to execute. It will generate a significant benefit to conduct perf...

In this contribution, we present an analysis of the effect of changing RM cell intervals on ABR performance. We describe our newly developed ABR model in OPNET. This OPNET ATM model contains enhanced features to support the QoS capabalities of ATM, and a comprehensive ABR feedback model. We describe the various features of the ATM model, and use it for our simulation and analysis.

B-ISDN can support various communication services because it uses ATM as the basis and ATM is a high-bandwidth, low-delay, cell switching and multiplexing technology. OPNET is a CAD tool which is specialized in communication protocols and networks. This paper presents our recent work of developing ATM network models with OPNET.

A general framework has been developed to test MANET routing efficiency for different physical layers, network topologies, and nodal mobilities using OPNET. With OPNET it is possible to design different physical layers, MAC layers, and routing schemes, to compare end-to-end statistics (end-to-end delay, throughput and power consumption), and finally to determine the most efficient solution.