Abstract
This paper addresses the possibility of using traffic engineering in the
wavelength domain as a way to improve the performance of optical
burst-switched (OBS) networks. With that aim, we detail a heuristic traffic
engineering strategy that determines the order by which the ingress nodes of
the network should search for an available wavelength for burst
transmission, in order to minimize the probability that data bursts going
through overlapping paths reach a common fiber link using the same
wavelength. By means of network simulation, it is shown that the proposed
traffic engineering strategy outperforms the existing strategies in reducing
burst loss in OBS networks. This trend holds for core nodes with different
degrees of wavelength conversion, ranging from the absence of wavelength
converters to the use of dedicated full-range wavelength converters. More
specifically, it is shown that using only traffic engineering in the
wavelength domain can dramatically reduce burst loss in networks without
wavelength conversion or alternatively it can reduce the number of
wavelength converters in networks based on shared wavelength conversion. The
simulation results also show that by combining traffic engineering in the
wavelength domain with the use of the inexpensive electronic buffers at the
ingress nodes, the performance of OBS networks with dedicated full-range
wavelength converters can be further improved at the expense of a slight
increase in the burst transfer delay.
© 2009 IEEE
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