Abstract
In this paper, we dimension a buffer in which headers are enqueued before
processing in an optical burst switching (OBS) network. For the first time,
we develop and analyze a unified OBS model comprising a set of homogeneous
and independent edge buffers that feed bursts to a standalone link and their
headers to a scheduler. Packets arrive at each edge buffer and are assembled
into bursts, after which they are transmitted on a wavelength channel if their
corresponding headers are successfully processed. In a case study, we demonstrate
numerically that an optimal scheduler buffer size may exist and depends on
the number of packets comprising a burst and the size of an edge buffer. We
also show that packet blocking probability can be minimized using a simple
rule of thumb for determining the optimal size of a scheduler buffer and the
number of packets comprising a burst. All our analytical results are validated
by way of simulation.
© 2008 IEEE
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