Abstract
This paper presents the recent achievements and main results of the
optical packet switching node with label swapping capabilities that was developed
in the framework of the IST-LABELS project. The implemented functionalities
allows the routing and forwarding of optical packets at 10 Gb/s based on the
information conveyed in the 18 GHz-subcarrier multiplexed (SCM) label at 155
Mb/s. Specific functions of the optical packet switching demonstrator such
as label extraction and rewriting are based on high-performance fiber Bragg
grating filters (FBG) whereas semiconductor optical amplifier (SOA) based
wavelength conversion allows payload 2R regeneration. Advanced aspects implemented
in the high speed electronic control unit such as traffic shaping, multicast,
and for the first time to our knowledge, a contention resolution algorithm
with priority processing are thoroughly described in this paper. This paper
also presents simulations exploring the effect of these advanced features
in the global performance of an optical packet switched network. In particular,
we found that the contention resolution algorithm based on parallel converters
with 16 wavelengths contributes to improve up to four orders of magnitude
the packet loss rate for low traffic loads whereas the improvement from traffic
shaping policies was of 1 order of magnitude for both low and medium traffic
loads. Along with the experimental results, the feasibility of the approach
as the basis for the next generation internet networks is demonstrated.
© 2009 IEEE
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