Circuit Planning Tool Over Heterogeneous Networks

Currently, there is no existing solution or tool to efficiently route a high-speed circuit over heterogeneous DWDM networks under multi-vendor environment, although each vendor may provide a planning tool to route a circuit within its own sub-network domain. This is mainly due to the lack of common technology for optical reachability calculation across vendor sub-networks. Each sub-network has its own proprietary parameters or formulas to calculate whether an optical path is reachable or not. To route a circuit across heterogeneous networks, the authors rely on the common function provided by each vendor tool to determine all reachable paths within each sub-network, i.e., the reachability matrix for each sub-network.