Daisy: A Scalable All-Optical Packet Network with Multifiber Ring Topology

This paper presents Daisy, a scalable all-optical packet network where each node is equipped with one wavelength-tunable transmitter and one fixed-wavelength receiver. Network scalability is obtained with a novel multifiber ring topology that allows spatial reuse of wavelengths and requires an optical transmitted power proportional typically to the square root of the number of nodes. The scalability of the proposed topology is analytically evaluated by taking into account the characteristics of state-of-the-art optical components. The topology of Daisy provides one logical channel per destination node. Each channel is shared in statistical time division by all nodes transmitting to a given destination. A channel inspection capability at each node allows the implementation of efficient slotted ordered access protocols. As an example, a simple and efficient protocol named SRR (Synchronous Round Robin) is described, and its performance is assessed by means of simulation.

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