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Proceedings Paper

CROWNs: all-optical WDM multiring topologies
Author(s): Imrich Chlamtac; Andrea F. Fumagalli
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Paper Abstract

Ring networks present an attractive solution for optical, high speed local and metropolitan area networks due to the simplicity of network interfaces and access control. Two problems need to be overcome to obtain an all optical network. One, the limitation on power budget resulting from optical losses that occur when data passes through intermediate nodes. The other, a reduced network throughput related to the linearity of the ring topology. Recent progress in WDM techniques has opened the possibility of overcoming this problem by an optical multi- channel solution. WDM taps the large fiber bandwidth by using different portions of the optical spectrum to realize (omega) different channels on the same fiber. However, in extant electronic node based architectures, even though high bandwidth optical transmission can be used to propagate packets between the nodes, the electronic elaboration of data at each node creates a performance bottleneck for the whole communication system. This leads to network throughput that is a mere fraction of the optical bandwidth potential. This work presents an approach to obtaining a concurrently accessed multi-ring all-optical WDM network (CROWN) with a node architecture in which packets pass through the node without being converted into the electronic domain. Using a single high speed transmitter and receiver, CROWN allows the data to be maintained in optical format while resolving receiver contentions.

Paper Details

Date Published: 15 October 1993
PDF: 13 pages
Proc. SPIE 1975, Local and Metropolitan Area Networks, (15 October 1993); doi: 10.1117/12.157006
Show Author Affiliations
Imrich Chlamtac, Univ. of Massachusetts/Amherst (United States)
Andrea F. Fumagalli, Politecnico di Torino (Italy)

Published in SPIE Proceedings Vol. 1975:
Local and Metropolitan Area Networks
Pierpaolo Ghiggino, Editor(s)

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