Structures of an ATM switching system with MPLS functionality

MultiProtocol Label Switching (MPLS) is a new IP over ATM technology that can be deployed in private networks as well as in public backbone networks operated by Internet service providers or telecommunication operators. From the viewpoint of telecommunication, we propose several structures of an ATM switching system having MPLS functionality that swaps a label at the packet forwarding engine and controls a label switched path at the MPLS controller. The proposed structures are discussed, and compared with each other according to their features. We also introduce the new ATM switching system named HANbit ACE 64 system that supports the MPLS functionality