Patent ID: 7369571
Filing Date: 2008-05-06
Classification: H04L

Abstract:
1. A telecommunications system comprising: an MPLS (multi-protocol label switching) packet based network; a packet ingress node for E-LSP (EXP inferred per hop behavior label switched path) packets having a QOS (quality of service) in communication with the packet based network; an ATM (asynchronous transfer mode) ingress node for an ATM network, the ATM ingress node receiving each E-LSP packet from the packet ingress node through the packet based network, segmenting the packet into cells including inferring PHBs (per-hop-behavior) of the cells without any changes to the cells' header encoding and inferring scheduling/queuing of cells based on the E-LSP packet's EXP (experimental) encoding, classifying the E-LSP packet based on its PSC (per-hop scheduling class) value, identifying the QOS associated with each cell, mapping the cells into the associated QOS, and forwarding the cells to a corresponding VC (virtual circuit); an ATM network in communication with the ATM ingress node; an ATM egress node which receives cells from the ATM ingress node, the ATM egress node in communication with the ATM network, the ATM egress node reassembles the cells from each VC back into a single E-LSP packet, and derives EXP bits for the single E-LSP packet from the received cells' VPI/VCI (virtual path/virtual circuit identifier) values and the cells' corresponding CLP (cell loss priority) bits, the ATM egress node in communication with the packet based network; a plurality of VCs corresponding with QOS between the ATM ingress node and the ATM egress node through the ATM network, the ATM ingress node sending each cell to the ATM egress node along the VCs whose QOS corresponds to the QOS of each cell; and a packet egress node for the packets in communication with the ATM egress node through the packet based network, which receives the packets from the ATM egress node.