Mr. Syed Muhammad Ahsan Rizvi Profile

Syed Muhammad Ahsan Rizvi

at Bahria Univ

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Proceedings Article | 25 October 2005 Paper

Modeling of scheduling and sequencing protocols for variable length messages in a single hop WDM network

Syed Muhammad Rizvi, Bilal Alvi

Proceedings Volume 6011, 60110D (2005) https://doi.org/10.1117/12.629261

KEYWORDS: Transmitters, Receivers, Mathematical modeling, Mathematics, Computed tomography, Wavelength division multiplexing, Software, Wavelength division multiplexing networks, Performance modeling, Computer simulations

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The ever increasing demand of the bandwidth has been efficiently fulfilled by the advent of Wavelength Division Multiplexing (WDM), which efficiently utilizes the available bandwidth of fiber links. The performance of these networks can be drastically improved by using efficient message scheduling and/or sequencing algorithm(s), to reduce the delay experienced by the packets and also to distribute the load among the available channels, to get maximum channel utilization. In this research we modeled protocols, which can improve network performance, as each of them may perform better in different operating circumstances. Several conditions were studied and performance of these algorithms has been compared, using our modeling tools. Most of the schemes proposed earlier ignored some parameters (e.g. tuning times of the transmitters and the receivers) or had some unrealistic assumptions, which will be discussed later in the paper. We tried to simulate more realistic scenarios. The parameters, which are monitored during the simulations, are average delay, throughput and channel utilization by changing the values of packet generation rate, number of available channels, transmitter and receiver tuning times. To verify the simulations we also developed a math model without making any unrealistic assumptions. Extensive simulations were conducted and a detailed study of the protocols is made possible.

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