Minimizing Wavelength Contention & Improving Packet Level Performance of Time Sliced Optical Burst Switching (TS-OBS) Network

Abstract

Optical Burst Switching (OBS) is one of the promising switching technique to meet the demands of the future networks. OBS combines the feature of optical circuit switching (OCS) and optical packet switching (OPS) which highlights its potential to meet the challenges of the future all optical networks (AON). In this work we present a modified network architecture of time sliced optical burst switching (TSOBS), which shows improved performance in terms of lower packet transmission delay. The motivation proposed work is to minimize wavelength contention and improve packet level performance at the edge node of an OBS network. Separate data and synchronization planes are defined for the data burst transmission and synchronization of all core network nodes, respectively. In order to achieve lower transmission delay and minimizing wavelength contention, different time slots are associated with wavelengths for the establishment of light path using modulo arithmetic. Additionally, we present a novel delay aware burst transmission algorithm which is designed to lower data loss probability. The performance of our proposed work and of those proposed in the literature is studied through computer simulation. The performance results indicate that our proposed solution performs significantly better than recently published work in this domain.