Presently, there are great differences between the performance of Mobile Ad Hoc Networks (MANETs) predicted by network simulators and actual field experience. One cause is that, although fine-grained variation in received signal strength greatly impacts the effectiveness of MANET routing protocols, it is almost never currently modeled. Although precise modeling of this variation is not feasible...

Different priorities and obstacles do not allow a small college to offer a variety of networks to its students and faculty for using them in the classrooms. As an option, they can use an invaluable tool, the OPNETTM IT Guru Academic software package [1] that offers all the tools for network model design, simulation and analysis at a reasonable cost. OPNET software can simulate a wide variety of...

IPv6, as the next generation Internet protocol, has been proposed and developed by IETF to replace the traditional IPv4. Compared to traditional IPv4, one of the key advantages of IPv6 is its inherent mobility feature called MIPv6 with which the mobile devices such as Laptop computers, PDAs etc. keep connectivity alive while roaming on the Internet. This paper is a study of the MIPv6 issues usi...

The history of telephone networks indicates a trend of employing sophisticated switches and dumb hosts. Hence, it is often expensive and difficult to replace switches and add new applications. In contrast, Internet employs simple routers and sophisticated applications in hosts. New applications can be added without requiring infrastructural changes. In order to keep routers simple, there is a g...

This paper reports on the design of an OPNET simulation platform to test the performance of sending real-time safety video over VANET (Vehicular Adhoc NETwork) using the WiMAX technology. To provide a more realistic environment for streaming real-time video, a video model was created based on the study of video traffic traces captured from a realistic vehicular camera, and different design cons...

Simulation has become the dominant technique for evaluating the performance of many products before real hardware is produced. In computer networks, this is particularly true, and can avoid expensive hardware and software development. Using simulation it is possible to explore different protocols and design options, under different loads, long before the design is frozen. However, such simulati...