Method and system for delivering service-enabled flow paths across multiple domains in sdn networks

A method as implemented in a first controller in a first software defined network (SDN) comprising:

• storing first domain topology information associated with said first SDN in a first database;
• transmitting on said inter-domain control network a first advertisement message to a second SDN controller in a second SDN domain, said first advertisement message comprising said first domain topology information associated with said first SDN, and receiving on said inter-domain control network a second advertisement message from a second SDN domain controller in said second SDN domain, said second advertisement message comprising second domain topology information associated with said second SDN;
• storing said received second domain topology information associated with said second SDN in said first database, and
• wherein said first controller autonomously determining an end-to-end flow path for traversal between said first and second SDN domains based on stored topology information in said first database.

A first software defined network (SDN) controller that is part of a first SDN domain and operable on an Internet protocol (IP) based network system comprising:

• (a) a service topology information base sub-system storing data of available active service enabled paths and associated service metrics between end points in said first SDN domain and a second SDN domain constructed based on service topology information gathered by said first SDN controller and service topology messages advertised by a second SDN controller associated with said second SDN domain;
• (b) a flow path constructor sub-system determining an end-to-end flow path between said end points based on both multiple service path topology alternatives stored in said service topology information base sub-system and a pre-determined algorithm;
• and
• (c) a resource reservation sub-system communicating with said second controller in said second SDN domain to negotiate and reserve said end-to-end flow path before the flow becomes active, to renegotiate flow path when the service requirements are no longer met, and to release said flow path after it is no longer needed.

A non-transitory computer-readable medium containing instructions that, when executed by a processor in a first controller in a first software defined network (SDN), cause said first controller to:

• store first domain topology information associated with said first SDN in a first database;
• transmit a first advertisement message to a second SDN controller in a second SDN domain, said first advertisement message comprising said first domain topology information associated with said first SDN, and receive a second advertisement message from a second SDN domain controller in said second SDN domain, said second advertisement message comprising second domain topology information associated with said second SDN;
• store said received second domain topology information associated with said second SDN in said first database, and
• autonomously determine an end-to-end flow path for traversal between said first and second SDN domains based on stored topology information in said first database.