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Optical Engineering

Real-time Ethernet based on passive optical networks
Author(s): Guiling Wu; Feirang Su; Xinwan Li; Weiwen Zou; Jianping Chen
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Paper Abstract

A passive optical network (PON) based real-time Ethernet (PONRTE), which can take advantage of PON features such as broad bandwidth, high reliability, and easy maintenance to satisfy the determination and real-time requirements of high performance industrial applications, is proposed. The protocol model and network architecture having a compatible physical layer and MAC layer with Ethernet passive optical network are presented for the proposed PONRTE. A fixed periodic time slot allocation mechanism including a synchronic time division multiplexing transmission and an asynchronic data transmission is adopted to guarantee the determination and real-time of the communication. A simple and easy to implement time synchronization approach, where the starting time of the first transmission slot of an access node is synchronized by a relative time synchronization while the starting time of subsequent slots is determined by the fixed period and a dynamic time synchronization, is designed to support the fixed time slot allocation mechanism and avoid the collision in PONRTE. A 100  Mb/s PONRTE experimental testbed with 16 access nodes and a time allocation period of 240 μs is demonstrated. The results show that the experimental PONRTE can work stably and reliably with a frame loss ratio less than 10 −7 .

Paper Details

Date Published: 7 February 2013
PDF: 7 pages
Opt. Eng. 52(2) 025007 doi: 10.1117/1.OE.52.2.025007
Published in: Optical Engineering Volume 52, Issue 2
Show Author Affiliations
Guiling Wu, Shanghai Jiao Tong Univ. (China)
Feirang Su, Shanghai Jiao Tong Univ. (China)
Xinwan Li, Shanghai Jiao Tong Univ. (China)
Weiwen Zou, Shanghai Jiao Tong Univ. (China)
Jianping Chen, Shanghai Jiao Tong Univ. (China)

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