الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The exponential evolving in the Internet traffic drives the demands for an optical networking which has been used for its higher bandwidth and high-speed switching networking. The all-optical network is gradually developed as the next generation communication network to meet the extreme increase in bandwidth from various users. An Optical Burst Switching (OBS) is the extreme efficient all-optical architecture for the next generation wideband optical internet. OBS is an optical switching technique that merging the low overheads and no buffers of Optical Circuit Switching (OCS) technique with the statistical multiplexing gain and high bandwidth utilization of Optical Packet Switching (OPS) technique. The most challenge problem in the Optical Burst Switching (OBS) core nodes is the burst loss due to a contention that occurs between simultaneous coming bursts contend for the same output resources. Wavelength conversion and deflection routing may be viable methods to resolve the burst contention problem and hence to improve the performance of an optical core switch. This thesis is concerned on studying the performance analysis of an OBS core node. A numerical and simulation performance analysis of an optical switching node is discussed at different switching queueing models to have the optimum queueing model for optical core node switch design. The waiting delay time, the average expected number of optical packets and the loss probability of packets in the optical switch are estimated at variable traffic loads and different wavelength channels. Study the effect of the Burst Length and the number of wavelength channels in an OBS core node performance is investigated to have the optimum OBS node parameter values for optical core node design. The steady-state throughput and the probability of burst loss blocking probability are the two performance metrics evaluated using steady-state occupancy probabilities and Poisson arrivals traffic model. Finally, a proposed OBS core node architecture is designed combining a wavelength conversion capability and the deflection routing technique to minimize the burst contention probability. The optimum values of adjusting the contention resolution mechanisms are investigated at different cases. Then, a performance analysis comparison according to a different number of wavelength channels and variable burst length values has been studied at these optimum values.