Performance Analysis of Optical Burst Switched Networks with Dynamic Simultaneous

TZVETELINA (LINA) BATTESTILLI Performance Analysis of Optical Burst Switched Networks with Dynamic Simultaneous Link Possession. (Under the direction of Professor HARRY G. PERROS). Given the current state of the technology, the Optical Burst Switched (OBS) network is the most practical all-optical architecture. The user data is transmitted in variable size data packets, called bursts, which travel as an optical signal along the entire route. The control information for each burst is transmitted prior to its corresponding burst and it is electronically processed at each hop along the route. The dynamic nature of OBS allows for network adaptability and scalability, which makes it very suitable for the transmission of Internet traffic. In this thesis we study and analyze the performance of OBS networks. We consider the case when the bursts are large enough to simultaneously hold wavelengths on multiple links. Since the size of the bursts varies and the link distance between two adjacent network nodes also varies, a burst may simultaneously occupy wavelengths on a variable number of links as it travels from its source to its destination. As the burst propagates through the network, it dynamically acquires and releases wavelengths from link to link. We propose queueing network models that feature dynamic simultaneous link possession and analyze them in order to obtain the end-to-end burst loss probabilities. This thesis has five parts. In the first part, we describe the Optical Burst Switch (OBS) architecture and summarize its main design components. We introduce the main OBS variants Just-In-Time (JIT), Just-Enough-Time (JET) and Horizon. We discuss the Jumpstart OBS testbed, which is based on the JIT protocol. We also present a literature review of the analytical performance models for a single OBS node and an OBS network of nodes. In the second part of this thesis, we study an OBS network where the bursts are large enough to simultaneously hold wavelengths on two consecutive links. In the third part, we extend this study to OBS networks, where the bursts simultaneously possess wavelengths on a different number of links. We propose queueing networks which model the simultaneous link possession. We propose a burst arrival process which relaxes the assumption that the burst arrivals are instantaneous and captures accurately the transmission time of the