IEEE802.11 have been fully understood in the networking era. Opnet with IEEE802.11 give assistance is an easily understood able simulation tool for communication researchers. However it’s academic Edition have limited abilities. In this paper author have studied performance of IEEE802.11b (WLAN) using various security parameters. Author found that the throughput was decreases with respect incre...

Most current approaches of parallel simulation focus on building new parallel simulation engines that require the development of new models and software. An alternate, emerging approach is to extend sequential simulators to execute on parallel computers. We describe a methodology for realizing parallel simulations in this manner. This work is specifically concerned with parallelization of comme...

This paper explores the use of OPNET to introduce a neural network Call Admission Control scheme in ATM networks to improve traffic management. The advanced capability of modeling traffic sources in OPNET was employed to depict a realistic ATM network model. The conventional CAC algorithm was explored under various traffic scenarios built using profiles based on varied traffic statistical distr...

1 Research Assistant of the Fund of Scientific Research Flanders (FWO-Vlaanderen) 2 ESAT-Telemic participates in the OPNET University Program for research and educational projects. Abstract It has become clear that the traditional Poisson model of data network traffic is insufficient for dimensioning and analyzing the performance of real-life networks. Fractal models are more appropriate for si...

In this paper, we extend OPNET® network simulator wireless local area network (WLAN) models to incorporate energy and security. We then use these models to study (1) performance and energy characteristics of large-scale secure WLAN networks under varying channel conditions and (2) impact of energy-efficient security protocol adaptations proposed in [2, 9] on the energy consumed by Internet Secu...

Ad-Hoc On-Demand Distance Vector (AODV) is a routing protocol for mobile ad hoc networks (MANET). AODV floods the network with control messages to discover a route to the destination, which often results in a large number of control packets traveling through the network. This paper introduces the design and implementation of GeoAODV routing protocol for OPNET Modeler. GeoAODV takes advantage of...

In this paper, we present the system level performance analysis of the OFDM for UTRAN system in a multiuser, multicell and multiservice environment. First the OPNET-based simulation platform is introduced and its main modules and major functions are described; then based on this platform the modeling methodologies specified to OPNET and system level simulation are given, which includes interfac...

The simulation of large-scale networks is a challenging task especially if the network to simulate is the Dynamic Multipoint Virtual Private Network, it requires expert knowledge to properly configure its component technologies. The study of these network architectures in a real environment is almost impossible because it requires a very large number of equipment, however, this task is feasible...

OPNET Modeler is one of the most popular commercial products for simulating and modeling of computer networks and related technologies. While creating a new simulation study using standard models is a fairly straight-forward task, developing new models or modifying existing ones could become a challenging and often frustrating undertaking. This paper provides an overview of OPNET Modeler’s soft...