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

作者：Yuang, Maria C^*; Tien, Po Lung; Hsu, Dar Zu; Chen, Shing Yu; Wei, Chia Chien; Shih, Ju Lin; Chen, Jyehong

来源：Journal of Lightwave Technology, 2012, 30(11): 1685-1693.

DOI：10.1109/JLT.2012.2186954

• Direct modulation
• medium access control (MAC)
• orthogonal frequency-division multiple access (OFDMA)
• passive optical network (PON)

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.

• 出版日期2012-6-1
• 单位中山大学