An Energy and Cost Efficient WDM/OFDMA PON System: Design and Demonstration

Author

Yuang, Maria ; Dar-Zu Hsu ; Po-Lung Tien ; Hsing-Yu Chen ; Chia-Chien Wei ; Shin-Hao Chen ; Jyehong Chen

Author_Institution

Dept. of Comput. Sci., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

31

Issue

16

fYear

2013

fDate

Aug.15, 2013

Firstpage

2809

Lastpage

2816

Abstract

In this paper, we propose an energy and cost efficient WDM/OFDMA PON system, referred to as NEWOPS. Based on a new two-tiered semi-tree architecture, NEWOPS allows a large number of ONUs to be connected to OLT using only a handful of colorless transceivers. Due to the architecture, NEWOPS not only facilitates high spectral efficiency and flexible sub-channel bandwidth allocation, but also reduces the Rayleigh backscattering (RB) problem and achieves high energy and cost efficiency. Experimental results demonstrate that, taking only 5-GHz bandwidth for each wavelength, NEWOPS successfully achieves 20-Gb/s downstream and 10-Gb/s upstream OFDM-xQAM transmissions via the same fiber trunk. We depict that, to support 40 ONUs for example, NEWOPS achieves energy efficiency that is three to six times higher than that of a typical 10-Gb/s WDM/OFDM PON.

Keywords

OFDM modulation; Rayleigh scattering; backscatter; bandwidth allocation; channel allocation; frequency division multiple access; optical design techniques; optical transceivers; passive optical networks; quadrature amplitude modulation; trees (mathematics); wavelength division multiplexing; NEWOPS; OLT; ONU; RB problem; Rayleigh backscattering; bit rate 10 Gbit/s; bit rate 20 Gbit/s; colorless transceivers; cost efficient WDM-OFDMA PON system; downstream OFDM-xQAM transmission; energy efficient WDM-OFDMA PON system; fiber trunk; flexible subchannel bandwidth allocation; frequency 5 GHz; optical line terminal; spectral efficiency; two-tiered semitree architecture; upstream OFDM-xQAM transmission; OFDM; Optical attenuators; Optical network units; Optical receivers; Passive optical networks; Transceivers; Wavelength division multiplexing; Energy efficiency; Orthogonal Frequency Division Multiple Access (OFDMA); Passive Optical Network (PON);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2013.2273932

Filename

6564413