Doctor ’ s Thesis Studies on Performance Analysis of Network Architectures for Wavelength Division Multiplexing

Wavelength division multiplexing (WDM) is attractive for the infrastructureof the next generation Internet, since it supports huge bandwidth by multiplexingseveral wavelengths into a single optical fiber. In order to transmit Internet dataover WDM networks, network architectures with photonic technologies, such aswavelength routing, optical burst switching (OBS), and optical packet switching(OPS) have been studied and developed.Currently, it is difficult to store data in optical domain because optical randomaccess memory has still been in development phase. It is also well known that thecost of wavelength conversion is much expensive, while the conversion capabilityis quite limited. Therefore, it is important to develop WDM network architec-tures under those constraints, and the evaluation of performance measures suchas loss probability, throughput, and wavelength utilization plays a crucial rolefor quantitative characterization of the developed network architectures. Thisdissertation focuses on two network architectures: the wavelength routing andOBS.The dissertation firstly considers the wavelength routing network with dy-namic lightpath configuration where a lightpath supports multiple label switchedpaths (LSPs). In this network, lightpaths are established according to the con-gestion state of a node and are released after some holding time. For the perfor-mance evaluation, the system is modeled as a multiple queueing system in light∗ Doctor’s Thesis, Department of Information Systems, Graduate School of Information Sci-ence, Nara Institute of Science and Technology, NAIST-IS-DT0161203, July 5, 2004.