Abstract
Feature Issue on Optical Interconnection Networks (OIN). A system of slotted
interconnected rings employing a combination of wavelength-division multiple access
(WDMA) with time-division multiple access (TDMA) can serve a metropolitan area
without electro-optical conversion and buffering of payload except at system entry
points. The multiple rings overcome the power budget limitations of the single ring
extending the reach of the system to even the largest metropolitan areas, the WDM
dimension provides flexibility and ease of evolution, and the TDMA dimension offers
the efficiency of multiplexing gain particularly under bursty traffic. The system
control information is transferred on a dedicated wavelength and is processed in the
electrical domain at the ring nodes and the hub, which interconnects the rings. The
algorithms control the access to each ring and the scheduling of slots among the
rings, based on explicit reservations, to adapt efficiently to the fluctuating
offered load. We present the design and hardware implementation of the access
control algorithms for such a system built in the framework of the Information
Society Technologies (IST) project DAVID (data and voice over DWDM).
© 2004 Optical Society of America
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