An Effective Evaluation of Wavelength Scheduling for Various WDM-PON Network Designs with Traffic Protection Provision

Abstract

Recently, metropolitan and access communication networks have markedly developed by utilizing a variety of technologies. Their bearer communication infrastructures will be mostly exploiting the optical transmission medium where wavelength division multiplexing techniques will play an important role. This contribution discusses the symmetric sharing of common optical network resources in wavelength and time domains. Wavelength-Division Multiplexed Passive Optical Networks (WDM-PON) attract considerable attention regarding the next generation of optical metropolitan and access networks. The main purpose of this contribution is presented by the analysis of possible scheduling of wavelengths for our novel hybrid network topologies considered for WDM-PON networks. This contribution briefly deploys adequate Dynamic Wavelength Allocation (DWA) algorithms for selected WDM-PON network designs with the provision of traffic protection when only passive optical components in remote nodes are utilized. The main part of this study is focused on the use of wavelength scheduling methods for selected WDM-PON network designs. For evaluation of offline and online wavelength scheduling for novel hybrid network topologies, a simulation model realized in the Matlab programming environment allows to analyze interactions between various metropolitan and access parts in the Optical Distribution Network (ODN) related to advanced WDM-PON network designs. Finally, wavelength scheduling methods are compared from a viewpoint of utilization in advanced WDM-PON networks designs.

Performance Analysis of Wavelength Division Multiplexing-Based Passive Optical Network Protection Schemes by Means of the Network Availability Evaluator

“…In [28], an analytical model for estimating a network availability under multiple-link failure scenarios is developed for WDM-networks with shared-link connections. For novel hybrid network topologies considered for WDM-PON network designs with traffic protection provision, a selection and optimization of the wavelength grouping on the physical layer can bring other improvements for effective practical utilization of future passive optical networks [29]. In future next-generation passive optical networks, a deployment of the Dense Wavelength Division Multiplexing (DWDM) technique is also expected in a short time.…”

High Bandwidth Utilization DWBA Algorithm for Upstream Channel in NG-EPON

“…This means that the ratio of the total service generated by all ONUs per second to the total bandwidth capacity of network is uniformly distributed from 0.1 to 1. Self-similar data is generated by Pareto distribution [26][27]. The guard time is 1μs.…”

Optimization of the Decision Criterion for Increasing the Bandwidth Utilization by Means of the Novel Effective DBA Algorithm in NG-PON2 Networks

“…For highly efficient bandwidth utilization, extended wavelength allocation methods must be also considered in current and near future hybrid Time-and Wavelength Division Multiplexing-based Passive Optical Network (TWDM-PON) [9][10][11][12][13]. Among other things, Next-Generation Passive Optical Networks (NG-PON) [14][15][16][17] provide cost-efficient traffic protection schemes [18][19][20][21][22], whereas fault management is important for uninterrupted internet access services [23][24][25]. Therefore, NG-PON networks must support the end-to-end protection option for use cases if specified reliability requirements based on user profiles are expected.…”