Abstract
Carrier Ethernet exhibits an enormous potential to be a cost-effective and
less complex replacement of SONET/SDH especially after the ratification of
IEEE standard 802.1Qay Provider Backbone Bridge-Traffic Engineering
(PBB-TE). The recent IEEE standard 802.3az Energy Efficient Ethernet (EEE)
presents another opportunity for service providers to select Ethernet as a
technology of choice in the backbone while leveraging on its promise for
achieving green transport network. In this paper, we propose two novel
architectures of photonic PBB-TE core and edge switches, which enhance the
usability of PBB-TE networks by reducing power consumption in individual
switches in conjunction with passive optical bypassing and EEE. We also
formulate the problem of energy-aware scheduling as an optimization problem
whose objective is to minimize the overall energy consumption for
transmitting Ethernet frames while satisfying their delay requirements. This
model will be used as a benchmark while evaluating the performance of packet
coalescing, a promising and recently proposed approach, as well as the
performance of EEE.
© 2012 IEEE
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