Abstract
This article puts forward a novel routing architecture for complex optical network, which core component is path calculation element (PCE). As is well known, the PCE-based distributed path computation structure is making the routing control and computation loosely coupled from traditional control plane. In the study, the resource allocation and routing algorithm are the critical part of PCE hierarchy. To compare the performance of new architecture and the traditional one, the user uses the flooding suppression, routing delay, resource utilization and traffic blocking probability as performance simulation parameters and taking the verification simulation on objective modular network testbed (OMNeT) platform against to source-node routing architecture. The numerical analysis, computer simulation and experiment work indicate that the operation of PCE-based routing architecture can reduce the flooding information of path calculation request as well as the routing hops significantly and improve the quality of service (QoS) by decreasing the blocking probability when failure happened.
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