GSM-Railways (GSM-R) is a communication mobile network designed to fulfill specific communication needs of railways. GSM-R is being widely deployed across Europe and other countries around the world for providing railway voice and train control services (ETCS). Despite that, GSM-R already shows various shortcomings in terms of capacity and support for additional data services. This triggers the...

This paper proposes a new designing parameter for scheduling algorithms for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. While many researchers focuses on the main QoS parameters, Maximum sustained rate(MST), minimum reserved rate, delay and jitter, this research focus on burst window size which is a which is a subjective parameter driven from the MST. In this wor...

Network parameters are vital ingredients of today’s data communication scenario especially Media access delay, Throughput and CPU utilization. This Paper has taken into consideration the modeling and implementation of Wireless Local Area Network (WLAN) based on OPNET simulator and evaluated the performance of the wireless local area network in a campus/university environment. Our model has been...

The recent trend is that the mobile internet service has been offered in the integration of various wireless networks. In such heterogeneous networks, vertical handover is more common and important handover technologies. But during vertical handover, standard TCP has experienced many problems such as multiple packet losses, the packet reordering, the under-utilization due to the drastic change ...

Differentiated Service Model (Diffserv) is currently a popular research topic as a low-cost method to bring QoS to today’s Internet, especially in the backbone. Simulation is the best way to study Diffserv before deploying it to the real Internet. In this paper, we introduce the techniques and methodologies that we used to design and implement Diffserv enabled routers by using OPNET. We have im...

Paper proposes a new design and a simulation model for the pico base station based on IEEE 802.16e standard and evaluates its performance in a mutihop-relay and mesh networks. The proposed base station design allows multihoprelay communications and thus opens a possibility for the proposed base station to be an element of mesh networks. The conventional IEEE 802.16e base stations interconnected...

This paper investigated a 1-out-of-2 controller fault-tolerant system composed of two industrial workcells. Improving the performance and the reliability of the employed IEEE 802.11g wireless backbone was the main focus of this study. The approach taken to achieve this goal is the application of parallel redundant diverse wireless communication. A parallel redundant wireless backbone that inter...