Title: An Energy and Cost Efficient WDM/OFDMA PON System Architecture
Authors: Yuang, Maria
Tien, Po-Lung
Chen, Jyehong
Department of Computer Science
Keywords: Passive Optical Network (PON);External Modulation;Energy Efficient;Orthogonal Frequency Division Multiple Access (OFDMA)
Issue Date: 1-Jan-2013
Abstract: In this paper, we propose an energy and cost efficient WDM/OFDMA PON system architecture, referred to as NEWOPS. Based on a two-tiered semi-tree topology, NEWOPS allows a large number of ONUs to be connected to OLT using only a handful of colorless transceivers. NEWOPS\' unique architecture not only facilitates high spectral efficiency and flexible sub-channel bandwidth allocation, but also enables the system to achieve high energy and cost efficiency. We conduct a theoretical study to identify and resolve a new data-rate performance issue due to the colorless and wavelength re-use design of the system. Experimental results show that when only 5-GHz bandwidth is allotted for each wavelength, NEWOPS successfully achieves symmetric 20-Gb/s downstream and upstream OFDM-16QAM transmissions via the same fiber trunk. As a demonstration of our system, we show how NEWOPS achieves energy efficiency that is two to twelve times higher than that of a typical tree-based WDM/OFDM PON when supporting 40 ONUs.
URI: http://hdl.handle.net/11536/128551
ISBN: 978-1-4799-1353-4
ISSN: 1930-529X
Begin Page: 2407
End Page: 2412
Appears in Collections:Conferences Paper