Abstract
Feature Issue on
Next-Generation WDM Network Design and Routing (WDMN). We present
a new architecture of an optical burst-switching (OBS) switch that consists of
several buffered stages using wavelength-division multiplexing (WDM) fiber delay
lines for buffering. The proposed switch architecture can cost effectively implement
a large buffer depth. The use of WDM in sharing the fiber delay lines allows the
proposed switch to emulate efficiently an output buffered switch using random-access
memory under first-in first-out (FIFO) scheduling. To handle the case of non-FIFO
scheduling, such as fair queueing, the buffered stages are interconnected by a
switching fabric so that intermediate increment of burst delays is possible and
non-FIFO scheduling algorithms can be implemented. Thus the proposed switch can deal
with bursty traffic and provide different quality of service (QoS). Simulations have
been performed to verify the performance of the proposed switch architecture for
providing differentiated services (DiffServ). The proposed switch architecture is
also compared with other switch architectures in the literature.
© 2003 Optical Society of America
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