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Tree Structured Fiber Optics Net


High bandwidth requirements make the use of fiber optics very attractive for metropolitan area network (MAN) implementations. Several fiber optics MAN architectures have been proposed. These architectures may be broadly subdivided into two classes: networks which use only passive components, and networks which include active processing components (e.g., ring interfaces, switches, bridges, etc.). The first class (e.g., Express Net, U-Net, etc.) suffers limitations in the number of stations that can be supported. The second class (e.g., rings, active buses, etc.) suffers of throughput and reliability constrains posed by the processing elements. This paper presents a novel fiber optics architecture, Tree-Net, which does not require intermediate processing components, and at the same time, permits to support a large number of stations. Tree-Net is based on a tree topology, passive station taps, and implicit token protocol. Properties and performance of Tree-Net are evaluated. It is then shown that the basic topology and access scheme of Tree-Net can be extended, so that a family of tree structured fiber optics MAN’S can be defined to suit different needs, including data, voice, and video integration.

Paper: PDF file of paper

Information & Date

IEEE JSAC, , July. 1988


Mario Gerla