This paper proposes an inter-domain path control system based on PCE (Path Computation Element) for large-scale
photonic networks, especially for a photonic network across over multiple carrier domains. We discuss the overall
architecture of multi-domain optical network control system. The system utilizes maximum flow information in path
computation and Path Key scheme in signaling, which improve the load-balancing and the confidentiality of the inside
information for the route computation and the path provisioning among different carriers. We also provide measured
performance results for inter-domain path computation and path setups using global optimization scheme, estimating the
path provisioning time at the network scale dependency with the route computation time and the signaling time. As a
result, we show its applicability to a 1000-node scale photonic network.
Network planning and operation have a complementary relationship with each other. In this paper, we show the benefits
of cooperation of network planning and operation. We also clarify network planning functionality required to let service
providers sustainably operate their networks with low cost.
In this paper, PCE-based inter-domain path computation has been discussed. Interworking of multiple PCEs with the BRPC procedure enables not only end-to-end shortest path computation but also end-to-end diverse path computation over multiple networks. We have analyzed various PCE-based inter-domain path computation strategies using BRPC, in terms of the path computation complexity. To reduce path computation time, a simplified path computation strategy was proposed and evaluated experimentally with our prototyped PCE system. Our experimental results show good correspondence with analytical ones. The proposed strategy drastically reduced path computation time down to one-seventh in comparison with the conventional strategy.