A method for selecting an optimal multi-constrained path between two network nodes across multiple network domains

摘要

The present invention relates to a building method of a path between a network management element of a domain and another network management element of neighbor domains, a domain comprising a plurality of network nodes. It is characterized in that it comprises the steps of:- When none of the network nodes of said domain is a target network node:- Expanding a path tree from at least one network node of said domain towards entry network nodes of at least one neighbor domain ;- Applying node colors to path tree nodes to indicate whether a path tree node is or is not under the scope of a neighbor domain to which a request is to be forwarded ; and- Forward a request with said path tree expanded to at least one network management element of said neighbor domain.