An energy and cost efficient WDM/OFDMA PON system architecture

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.

[1]  R P Giddings,et al.  Wavelength reused bidirectional transmission of adaptively modulated optical OFDM signals in WDM-PONs incorporating SOA and RSOA intensity modulators. , 2010, Optics express.

[2]  F. Kano,et al.  Transmission performance of chirp-controlled signal by using semiconductor optical amplifier , 2000, Journal of Lightwave Technology.

[3]  K. Petermann,et al.  Small signal analysis for dispersive optical fiber communication systems , 1992 .

[4]  Jianjun Yu,et al.  A WDM-OFDM-PON architecture with centralized lightwave and PolSK-modulated multicast overlay. , 2010, Optics express.

[5]  James C. Hoe,et al.  Design and simulation of 25 Gb/s optical OFDM transceiver ASICs , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[6]  Rodney S. Tucker,et al.  Energy consumption in wired and wireless access networks , 2011, IEEE Communications Magazine.

[7]  Achim Autenrieth,et al.  Cost and energy consumption analysis of advanced WDM-PONs , 2011, IEEE Communications Magazine.

[8]  Madeleine Glick,et al.  Design studies for ASIC implementations of 28 GS/s optical QPSK- and 16-QAM-OFDM transceivers. , 2011, Optics express.

[9]  S. Dahlfort,et al.  Cost, power and performance analysis of WDM-PON systems based on reflective transmitters for next-generation optical access , 2012, OFC/NFOEC.

[10]  Maria C. Yuang,et al.  A High-Performance OFDMA PON System Architecture and Medium Access Control , 2012, Journal of Lightwave Technology.

[11]  Po L. Tien,et al.  Next-generation OFDMA-based passive optical network architecture supporting radio-over-fiber , 2010, IEEE Journal on Selected Areas in Communications.

[12]  Junqiang Hu,et al.  Energy efficient OFDM transceiver design based on traffic tracking and adaptive bandwidth adjustment. , 2011, Optics express.

[13]  Maria C. Yuang,et al.  A virtual-tree OFDMA PON system architecture , 2012, 2012 IEEE International Conference on Communications (ICC).

[14]  G. Chang,et al.  Centralized Lightwave WDM-PON Employing 16-QAM Intensity Modulated OFDM Downstream and OOK Modulated Upstream Signals , 2008, IEEE Photonics Technology Letters.

[15]  Pan Cao,et al.  Energy-efficient WDM-OFDM-PON employing shared OFDM modulation modules in optical line terminal. , 2012, Optics express.