Abstract
The DARPA CORONET project seeks to develop the target network architectures
and technologies needed to build next-generation long-distance IP-over-Optical-Layer
(IP/OL) networks. These next-generation networks are expected to scale 10–100
times larger than today's largest commercial IP/OL network. Furthermore, DARPA
has established advanced objectives for very rapid provisioning of new IP
or private line connections, very rapid restoration against up to three simultaneous
network failures, and future dynamic “wavelength” services ranging
from speeds of 40–800 Gigabits per second. Besides these ambitious goals,
the CORONET project seeks to establish a commercially-viable network architecture
that supports both commercial and government services. In this paper, we describe
the CORONET program requirements, and present our initial architectures and
analysis of the early phases of this long-term project. We propose a novel 2-Phase Fast Reroute restoration method
that achieves 50–100 ms restoration in the IP-Layer in a cost-effective
manner, and a commercially viable OL restoration method that can meet the
rapid CORONET requirements. We also estimate the magnitude of the extra capacity
needed to provide dynamic wavelength services compared to that of static services,
and show that the extra capacity to restore a small percentage of high priority
traffic against multiple failures requires a small amount of extra capacity
compared to that of single failures.
© 2009 IEEE
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