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 nov el multifiber ring topology that allows spatial reuse of wavelengths a nd requires an optical transmitted power proportional typically to the square root of the number of nodes. The scalability of the proposed t opology is analytically evaluated by taking into account the character istics of state-of-the-art optical components. The topology of Daisy p rovides one logical channel per destination node. Each channel is shar ed in statistical time division by all nodes transmitting to a given d estination. A channel inspection capability at each node allows the im plementation of efficient slotted ordered access protocols. As an exam ple, a simple and efficient protocol named SRR (Synchronous Round Robi n) is described, and its performance is assessed by means of simulatio n. (C) 1998 Elsevier Science B.V. All rights reserved.