Abstract
Feature Issue on Optical Interconnection Networks (OIN). We present what we
believe to be a new scheme, called preemptive prioritized just enough time (PPJET),
for quality-of-service (QoS) provisioning in bufferless optical burst switching
(OBS) networks. PPJET provides better service for high-priority traffic by dropping
reservations belonging to lower-priority traffic with a new channel-scheduling
algorithm called preemptive latest-available unused channel with void filling
(PLAUC-VF). An approximate method for calculating the dropping probability in PPJET
is also discussed. Moreover, we perform discrete-event simulations to evaluate the
performance of PPJET. Simulation results show that PPJET outperforms offset-based
QoS schemes both in terms of dropping probability and end-to-end delay.
© 2004 Optical Society of America
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