Design and performance analysis of practical OBS WDM ring for expanding to access networks

Abstract

In this thesis, optical burst switched (OBS) wavelength division multiplexing (WDM) ring architecture is proposed for supporting metropolitan area networks (MAN). The proposed OBS ring architecture consists of N OBS nodes connected by optical fibers, and N data burst wavelengths and one separate control wavelength. For data burst wavelengths, tunable transmitter and fixed receiver (TT-FR) are used while a fixed transceiver for a control wavelength is chosen in each node of the proposed OBS ring. Each node has its dedicated receiving wavelength. In order to improve end-to-end delay and queueing size, a multi-token protocol for OBS ring network, called modified round-robin manner / token (M-RR/Token), is also proposed in this thesis. Moreover, for expanding OBS networks to access networks, this thesis proposes multiple rings architecture and ring+PON architecture. The performance analysis using OPNET network simulator shows that the proposed architecture can flexibly accommodate a large number of access networks and M-RR/Token reduces about 3ms in end-to-end delay and about $2.3\times10^5$ bits in queueing size, compared with RR/Token at average arrival rate 2 Gbps.