The multi-frequency time-division multiple access (MF-TDMA) has become general in satellite communications. In this paper, we developed a simulation model for MF-TDMA-based satellite networks using OPNET simulator. With the simulator, we evaluated the efficient use of DAMA schemes using MF-TDMA compared to PAMA based on FDMA.

This paper will outline issues associated with communication system interoperability, the security vulnerabilities associated with improved interoperability, network simulation to support the evaluation of the effects of worm-induced packet storms and the experimental design, implementation and results using the OPNET simulation environment.

Routing is a significant issue in MANETs. In this paper, we have studied the performance of Mobile Ad-hoc network to analyze the impact of AODV, DSR and OLSR routing protocols using OPNET. The applications traffic considered are database and http traffic types and the performance is analyzed using throughput, delay and media access delay parameters.

Network models in OPNET are constructed from two broad classes of components: communication nodes and communication links. The internal structure of these objects, for the most part, is not visible at the network level. This chapter presents the methods used to specify the internal structure and therefore much of the capabilities of communication nodes. For a discussion of communication links, ...

In order to solve the problems of existing broadband power line carrier communication standard IEEE1901.1 data link layer protocol network, multiple primary nodes receiving beacon will send connotation entreaty message, and CCO an association sanction message proximately after confirm their character central coordinator confirmation reply is not timely reduce success rate network access, high a...

In this paper, we describe our work on developing and evaluating detailed OPNET simulation models of an enhanced Very Small Aperture Terminal (VSAT) satellite Internet gateway and an enhanced satellite hub based on Cerona SkySPAN technology with capacity and latency optimizations in the return channel so as to allow significantly higher number of users and a better user experience. The Cerona S...

Using the base MIP protocol, two routing inefficiencies can be observed. The first is what’s called triangular routing: all traffic for the mobile node has to go through the home agent, increasing the routing path from the corresponding node to the mobile node. A possible solution is to let the correspondent nodes tunnel traffic directly to the care-of address: when the home agent first interce...

This paper introduces a packet reservation based MAC layer for broadband fixed wireless access communications. The performance of a reservation based MAC scheme is compared with the performances of Pure-ALOHA and Slotted-ALOHA MAC schemes. A simulation using OPNET Modeler is performed to compare the performance of these MAC schemes in terms of channel throughput and average packet delay.

This paper presents strategies for transmitting MPEG4 video by using rate matching techniques over the WCDMA air interface. We use an OPNET simulation model to analyze the channel utilization and transmission delay performance when transmitting MPEG4 traffic over dedicated channels in the WCDMA UP link.