Patent ID: 7672313

Claim:
A method for realizing route forwarding in a network including a bearer control entity and a bearer network, comprising: establishing a plurality of Label Switching Paths (LSPs) in the bearer network, wherein each LSP comprises a starting node and an ending node; setting an entrance label pointing to the forwarding information of the LSP at the starting node of each LSP; assigning, by the bearer control entity, a transfer path comprising at least one LSP in the bearer network for a service flow to be transferred, wherein the transfer path comprises an ingress edge node and an egress edge node; wherein the information of entrance labels corresponding to all of the LSPs that the transfer path comprises, in form of a label stack, being sent to the ingress edge node of the transfer path; when forwarding the service flow, the ingress edge node which receives the label stack attaching the label stack to the data packet of the service flow to generate a Multiple Protocol Label Switching (MPLS) exchange packet; and forwarding the MPLS exchange packet along the transfer path according to the label stack until the MPLS exchange packet reaches the egress edge node of the transfer path; wherein the step of establishing LSPs in the bearer network comprises: establishing the LSPs based on the hierarchical MPLS technology.