Home // International Journal On Advances in Systems and Measurements, volume 5, numbers 3 and 4, 2012 // View article

Hybrid WDM‒XDM PON Architectures for Future Proof Access Networks

Authors:
Rodolfo Alvizu
Alfredo Arcia
Maybemar Hernández
Mónica Huerta
Idelfonso Tafur Monroy

Keywords: Future access network; optical bypass; Self‒Aggregation; Hybrid WDM‒PON; Metro‒Access.

Abstract:
The design of future proof optical access networks is a challenging and hot research topic. In this work we summarized the requirements for future proof networks and the expected evolution of optical access networks. The current network infrastructure is composed by too many domains where the electronic processing bottleneck must be relieved. The evolution and penetration of Optical Access Networks threatens to create a higher electronic bottleneck at Metro‒Access interfaces. In this paper we evaluated an enhanced version of time‒wavelength access architecture with optical bypass and traffic self‒aggregation based on colorless customer terminals. The purpose of this hybrid Passive Optical Network with Wavelength Division Multiplexing and Time Division Multiplexing architecture is to allow for a transparent Metro‒Access interface with low latency and reduced power consumption. The time‒wavelength access architecture is based on the nonuniform traffic profile in networks to introduce optical bypass. For comparison a Passive Optical Network with Wavelength Division Multiplexing architecture was used as reference. Simulation results obtained by a developed model in OPNET Modeler showed that the Passive Optical Network with Wavelength Division Multiplexing tends to present electronic bottleneck issues, even though delays and loss rates were not very different in both architectures. These bottleneck issues can be avoided by the introduction of optical bypass and traffic self‒aggregation. Optical bypass allows nodes to avoid electronic processing; therefore, delay and power consumption can be reduced. The proposed architecture is an interesting useful approach for Metro‒Access integration and future access networks. This paper represents a baseline for future design of hybrid Passive Optical Network with Wavelength Division Multiplexing architectures and optical bypass for traffic self‒aggregation. Such hybrid schemes can be based on multiplexing technologies like Orthogonal Frequency Division Multiplexing.

Pages: 139 to 153

Copyright: Copyright (c) to authors, 2012. Used with permission.

Publication date: December 31, 2012

Published in: journal

ISSN: 1942-261x