Abstract
A local- or metropolitan-area network (LAN or MAN) that exploits the power losses of fiber-optic passive taps so that wavelengths can be reused in different portions of the network is proposed. In this network, many simultaneous transmissions can occur on any given wavelength, with negligible interference, because a signal is sufficiently attenuated (by other nodes' passive couplers) when it reaches another portion of the network that reuses the same wavelength. The network can support an arbitrary number of nodes because packets take multiple hops, when necessary, to reach their destinations. Signals are regenerated at intermediate nodes, when necessary, using the same transmitters and receivers needed at the nodes for accessing the fiber, so that no additional repeaters or amplifiers are required. Furthermore, packets bypass most nodes as they propagate toward their destinations, thereby reducing the number of hops. One fault-tolerant example configuration, a dual ring-shaped passive bus, is examined. Assuming a 30-dB link power budget, ideal 11-dB couplers, and a 1-Gb/s transmission rate per link, a network connectivity pattern (i.e., wavelength assignment) that provides a capacity of 96 Gb/s for a uniform traffic model and an infinite number of nodes is proposed. Interference problems that arise in these ring-shaped passive-bus networks are addressed.
Original language | English |
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Pages | 62-63 |
Number of pages | 2 |
State | Published - 1990 |
Event | LEOS Summer Topical on Optical Multiple Access Networks - Monterey, CA, USA Duration: 25 Jul 1990 → 27 Jul 1990 |
Conference
Conference | LEOS Summer Topical on Optical Multiple Access Networks |
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City | Monterey, CA, USA |
Period | 25/07/90 → 27/07/90 |