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OPNET Technologies OPNET is a registered
Dr. Hazem Refai Robert C. Huck |
Behavior of Networks Composed of Various 802.15.4/ZigBee Nodes In the Interoperability Lab at OU-Tulsa, we would like to simulate the behavior of networks composed of various 802.15.4/ZigBee nodes. We want to examine how the topology, the access method, the number of members, and the output power influence the behavior of the network. We want to consider the real-time capability, the robustness, security, and the power consumption behavior of the 802.15.4/ZigBee networks. To help solve these questions, we would like to develop a model specific to 802.15.4/ZigBee and to analyze the network using OPNET Modeler. Simulation of Ad Hoc Routing Protocols An ad hoc network is a collection of nodes that do not depend on any
preconfigured infrastructure. They can be formed on the fly. Each node
in the network receives and forwards messages, acting like a router. There are many protocols proposed in the literature to support routing in ad hoc networks, to name a few, ad hoc on-demand distance vector routing (AODV), dynamic source routing (DSR), zone routing protocol (ZRP), etc. There are many tools which can be used to simulate these protocols; some of them are OPNET, GLOMOSIM, NS-2 and JIST. We are looking at the possibility of simulating AODV, DSR and ZRP using OPNET, GLOMOSIM and JIST, and comparing the results to see the influence of simulation tools on the results. Hybrid Mobile Ad Hoc Networks Using RF Wireless and Free-Space Optics We are trying to model a mobile ad hoc network (MANET) based on hybrid operations of radio-frequency (RF) wireless and free-space optics (FSO), and to simulate its performance. Issues involved in the research include the design and implementation of a suitable routing protocol, modeling of FSO transmissions, switching between the RF and FSO modes of operation, mobility studies, etc. The most often used OPNET products in this project are Modeler and Wireless Module. Average Queueing Delays for Complex Queueing Models This research project requires calculating average queueing delays for complex queueing models such as M/G/1, G/G/1 and self-similar queues. Because of the complexity of the analytical models, we seek to use OPNET to simulate these queues in order to obtain estimates of their average delays. Voice Over IP (VOIP) Performance on Wireless Networks OPNET Modeler is used to model the performance of VOIP on wireless 802.11 networks. Modeler is used to model 802.11 layer 2 protocols, and VOIP signaling and media stream protocols. Scenarios include looking at how many calls 802.11 a/b/g networks can support. DWDM Networks OPNET with the DWDM extension is used to perfom network routing traffic and capacity simulations, DWDM link layer simulations with and without wavelength conversion, economic modeling, and if the tool can provide it, round-trip and switching delay simulations. More details depend on the actual project. Academics TCOM 5213 Network Design and Management is a course instructed by Dr. Hazem Refai. The course covers the basic issues in the design and management of telecommunication networks. OPNET is the recommended simulation environment providing a performance evaluation for networks to enhance the students' understanding of related topics. |
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