Next Article in Journal
Coal Char Derived Few-Layer Graphene Anodes for Lithium Ion Batteries
Previous Article in Journal
Basic Technology and Clinical Applications of the Updated Model of Laser Speckle Flowgraphy to Ocular Diseases
Previous Article in Special Issue
Polarization-Independent All-Optical Regenerator for DPSK Data
Open AccessArticle

Energy-Saving Mechanism in WDM/TDM-PON Based on Upstream Network Traffic

Universitat Politècnica de Catalunya, Esteve Terradas 7, 08860 Barcelona, Spain
Politecnico di Milano, Via Ponzio 34/5, 20133 Milan, Italy
Author to whom correspondence should be addressed.
Photonics 2014, 1(3), 235-250;
Received: 21 July 2014 / Accepted: 5 August 2014 / Published: 12 August 2014
(This article belongs to the Special Issue All Optical Networks for Communications)
PDF [1174 KB, uploaded 13 August 2014]


One of the main challenges of Passive Optical Networks (PONs) is the resource (bandwidth and wavelength) management. Since it has been shown that access networks consume a significant part of the overall energy of the telecom networks, the resource management schemes should also consider energy minimization strategies. To sustain the increased bandwidth demand of emerging applications in the access section of the network, it is expected that next generation optical access networks will adopt the wavelength division/time division multiplexing (WDM/TDM) technique to increase PONs capacity. Compared with traditional PONs, the architecture of a WDM/TDM-PON requires more transceivers/receivers, hence they are expected to consume more energy. In this paper, we focus on the energy minimization in WDM/TDM-PONs and we propose an energy-efficient Dynamic Bandwidth and Wavelength Allocation mechanism whose objective is to turn off, whenever possible, the unnecessary upstream traffic receivers at the Optical Line Terminal (OLT). We evaluate our mechanism in different scenarios and show that the proper use of upstream channels leads to relevant energy savings. Our proposed energy-saving mechanism is able to save energy at the OLT while maintaining the introduced penalties in terms of packet delay and cycle time within an acceptable range. We might highlight the benefits of our proposal as a mechanism that maximizes the channel utilization. Detailed implementation of the proposed algorithm is presented, and simulation results are reported to quantify energy savings and effects on network performance on different network scenarios. View Full-Text
Keywords: PON; WDM/TDM-PON; energy-saving; channel utilization PON; WDM/TDM-PON; energy-saving; channel utilization

Figure 1

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Garfias, P.; De Andrade, M.; Tornatore, M.; Buttaboni, A.; Sallent, S.; Gutiérrez, L. Energy-Saving Mechanism in WDM/TDM-PON Based on Upstream Network Traffic. Photonics 2014, 1, 235-250.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Photonics EISSN 2304-6732 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top