Abstract
In this paper, we propose a new composed buffer structure termed as wavelength
converted broadcast-selective (WCBS). It copies each packet after conversion to all
fiber delay lines, and makes the packet management flexible and efficient. By
rearranging the packet waiting queue, the highest priority packet can leave the buffer
without considering the existing queue, which makes preemption possible. Moreover, we
construct an OPS node architecture employing the as-proposed WCBS buffer in
output-buffered pattern. Some proper switching strategies are introduced to operate the
switching node effectively. An analysis model is established to describe the packets in
the node. The minimum packet loss performances under different traffic loads with
different buffer parameters are calculated. The results are further verified by
simulations. It implies that the WCBS buffer improves the performance of high priority
packets effectively, especially when the high priority packet load is low.
© 2010 IEEE
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