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Summary: JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 27, NO. 13, JULY 1, 2009 2495
Performance Evaluation and Design of Polymorphous
OBS Networks With Guaranteed TDM Services
José Alberto Hernández, Pedro Reviriego, José Luis García-Dorado, Víctor López, David Larrabeiti, Member, IEEE,
and Javier Aracil
Abstract--In Polymorphous Optical Burst-Switched (POBS)
networks, the Burst Control Packets (BCPs) of conventional
Just-Enough-Time based signalling OBS networks are given
extended properties which enable them not only to reserve fixed
time-slots for asynchronous data bursts, but also to allocate TDM
reservations for periodic streams of data, and even a complete
wavelength for high-bandwidth demanding services. This allows
POBS to provide a flexible, yet transparent, approach for sup-
porting the idiosyncrasies of today's most popular services over
the same underlying network architecture. In POBS, the spare
gaps in between synchronous TDM reservations can be used for
the allocation of best-effort data bursts, leading to a more efficient
utilisation of the optical capacity.
This work shows how to extend the well-known Erlang Fixed
Point procedure to evaluate the performance behavior of POBS
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