Abstract
We propose an extension of the popular priority just-enough-time (PJET) system
in optical-burst-switched networks to provide absolute quality-of-service (QoS)
differentiation. PJET is a simple QoS protocol that provides relative service
differentiation by means of an extra offset time given to higher-priority bursts. By
the innovative use of fiber delay lines (FDLs) and an accompanying token algorithm,
we are able to achieve an absolute QoS technique that provides a worst-case loss
probability for the guaranteed traffic. This absolute PJET technique is similar to
the PJET scheme in that it conforms to the conservation law at high loads. This
means that the drop probability of low-priority bursts is kept to a minimum. This is
a significant advantage over existing absolute QoS techniques that employ
intentional dropping or wavelength reservation, which does not conform to the
conservation law.
© 2004 Optical Society of America
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription