Title: A High-Performance OFDMA PON System Architecture and Medium Access Control
Authors: Yuang, Maria C.
Tien, Po-Lung
Hsu, Dar-Zu
Chen, Shing-Yu
Wei, Chia-Chien
Shih, Ju-Lin
Chen, Jyehong
Department of Computer Science
Department of Electrical and Computer Engineering
Department of Photonics
Keywords: Direct modulation;medium access control (MAC);orthogonal frequency-division multiple access (OFDMA);passive optical network (PON)
Issue Date: 1-Jun-2012
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.
URI: http://hdl.handle.net/11536/15968
ISSN: 0733-8724
Volume: 30
Issue: 11
End Page: 1685
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