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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 30, Iss. 11 — Jun. 1, 2012
  • pp: 1685–1693

A High-Performance OFDMA PON System Architecture and Medium Access Control

Maria C. Yuang, Po-Lung Tien, Dar-Zu Hsu, Shing-Yu Chen, Chia-Chien Wei, Ju-Lin Shih, and Jyehong Chen

Journal of Lightwave Technology, Vol. 30, Issue 11, pp. 1685-1693 (2012)


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Abstract

Orthogonal frequency-division multiplexing (OFDM) passive optical network (PON) has been considered to be a promising next-generation broadband wired access solution. However, based on the current tree-based architecture, existing OFDM PON systems face severe challenges when increasing the scalability and data-rate performance. In this paper, we propose a high-performance virtual-tree orthogonal frequency-division multiple access PON system (VTOPS). With the virtual-tree architecture and coupled with the use of inexpensive direct modulation, VTOPS features high reliability, scalability, spectrum efficiency, and cost effectiveness all at once. For governing the flexible/fair access and dynamic allocation of bandwidth, VTOPS incorporates a rate-based medium access control (MAC) scheme. The MAC scheme performs dynamic rate adjustment using a neural-fuzzy system. By adjusting the system parameters, the MAC scheme can achieve a wide range of delay and fairness performance under a variety of traffic patterns. Finally, we show both theoretical and experimental results to demonstrate that, by applying the power pre-emphasis algorithm and adaptive subchannel modulation, VTOPS achieves 40 Gb/s downlink and 40 Gb/s uplink transmissions, using low-cost 10 GHz directly modulated lasers.

© 2012 IEEE

Citation
Maria C. Yuang, Po-Lung Tien, Dar-Zu Hsu, Shing-Yu Chen, Chia-Chien Wei, Ju-Lin Shih, and Jyehong Chen, "A High-Performance OFDMA PON System Architecture and Medium Access Control," J. Lightwave Technol. 30, 1685-1693 (2012)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-11-1685

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