Performance Analysis of Hybrid Passive Optical Networks

Abstract

The rapid augmentation in the access networks demands huge bandwidth to provide voice, data and video (triple play) services for residential and corporate subscribers. Due to the higher bandwidth requirement, optical broadband access networks are the most promising solution for the demand of high channel capacity at longer transmission distance. The researchers are giving more focus on the designing and implementation of innovative access system architecture, sustaining huge data at high speed with larger bandwidth for the next generation demands. Passive Optical Networks (PONs) appealed to provide a lucrative, highly flexible and scalable network for all the end subscribers. One aspect of achieving higher data rates over fiber to fulfill the large bandwidth demand is multiplexing techniques. On the basis of multiplexing techniques, PONs can be divided into two main schemes viz. Wavelength Division Multiplexing (WDM) and Time Division Multiplexing (TDM) schemes. In recent times, researchers are aiming at the concepts of hybrid (WDM/ TDM) PON. This thesis deals with the performance evaluation of hybrid PON systems by designing new architectures, finding out suitable amplifier, improving the overall performance by mitigating and analyzing the crosstalk and implementing different topologies with tracking several system level challenges while acknowledging the limitations of existing networks. In order to achieve these objectives, it is utmost important to design, characterize and investigate hybrid PON for high capacity access systems. Firstly, we have proposed various architectures of hybrid PONs and analyzed the performance and feasibility of these architectures. In the first architecture, a hybrid PON using triple play services is simulated for 128 Optical Network Units (ONUs) for suitability of various data formats. Further, a bidirectional hybrid PON using circulator has been investigated for different data rates i.e. 1.25, 2.5, 5 and 10 Gbps.