PCEP Extension for PCECC Support of Distributed Computing, Multiple Services, and Inter-Domain Routing

A path computation element (PCE) central controller (PCECC) comprising:

• a memory comprising executable instructions;
• and
• a processor coupled to the memory and configured to execute the instructions, wherein executing the instructions causes the processor to:
• receive, from a plurality of path computation clients (PCCs), network topology information of each of the plurality of PCCs;
• determine, according to the network topology information, a first subset of the plurality of PCCs, each having a first network characteristic;
• assign the first subset of the plurality of PCCs to a first network topology;
• and
• transmit network connection information to each PCC assigned to the first network topology and belonging to the first subset of the plurality of PCCs.

A path computation element (PCE) central controller (PCECC) comprising:

• a memory comprising executable instructions;
• and
• a processor coupled to the memory and configured to execute the instructions, wherein executing the instructions causes the processor to:
• receive a request to compute a path crossing a plurality of domains in a network;
• compute a core tree coupling the plurality of domains;
• assign a first multiprotocol label switching (MPLS) label space and an outgoing interface using PCE communication protocol (PCEP) to a first edge node of a first domain associated with the PCECC;
• and
• assign a second MPLS label space and an incoming interface using PCEP to a second edge node of a second domain that is coupled to the first edge node of the first domain.