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Blocking probability of a preemption-based bandwidth-allocation scheme for service differentiation in OBS networks

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3 Author(s)
Phuritatkul, J. ; Nat. Inst. of Informatics, Tokyo ; Yusheng Ji ; Yongbing Zhang

For the next generation optical Internet, optical burst switching (OBS) is considered as a promising solution to exploit the capacity provided by wavelength-division-multiplexing technology. In this paper, the authors analyze preemption-based bandwidth-allocation (PBA) scheme for supporting service differentiation in OBS networks. They first propose the mathematical analysis of burst blocking probability (BBP) for a general case of probabilistic wavelength-preemption algorithm. The BBP of a new arrival burst for a K-channel N-class system is presented. They then apply this model to PBA. The results of analytical loss model are investigated and compared with simulations. The simulation results validate their analytical model and show that a BBP can be controlled for different service classes with the PBA scheme

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Lightwave Technology, Journal of  (Volume:24 ,  Issue: 8 )