Dynamic Wavelength Allocation in Integrated Optical Path and Optical Packet Switch

Dang-Quang BUI  Hiroaki HARAI  Won-Joo HWANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.12   pp.3412-3420
Publication Date: 2011/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.3412
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fundamental Theories for Communications
Keyword: 
queuing theory,  optical paths,  optical packets,  optical circuit switching,  optical packet switching,  

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Summary: 
Integration of optical paths and packets in a switch is a key technique to support ultra-high-speed traffic in the future Internet. However, the question of how to efficiently allocate wavelengths for optical paths and optical packets has not been solved yet due to the lack of a systematic model to evaluate the performance of the integrated switch. In this paper, we model the operation of the integrated switch as a system of two queuing models: M/M/x/x for optical paths and M/M/1/LPS for optical packets. From the model, we find an optimal policy to dynamically allocate wavelength resources in an integrated switch. Simulation results demonstrate that our mechanism achieves better performance than other methods.