Patent ID: 7447213
Filing Date: 2008-11-04
Classification: H04L

Abstract:
1. A method for realizing an end-to-end connection between a client layer connected to a Resilient Packet Ring (RPR) network and a client layer connected to a Multi Protocol Label Switching (MPLS) network, the method comprising: interconnecting the RPR network and the MPLS network through a Transparent LAN Service (TLS )layer; in the direction from RPR to MPLS: in the direction from MPLS to RPR: wherein an auxiliary TLS Header is added to said received client frames, obtaining said TLS packets; then an RPR Header is added to said TLS packets, obtaining said RPR packets, and in that said TLS Header contains a channel identifier field, identifying the connection between the client layer connected to the RPR network and the client layer connected to the MPLS network, said TLS Header further containing Reserved bits and Error correction bits, and wherein in the direction from RPR to MPLS, the TLS header is converted in an MPLS Header by the following steps: the TLS channel identifier field is left unchanged and becomes the MPLS Label in the MPLS header; TLS Reserved bits are left unchanged and put in the MPLS header; the TLS Error correction bits are removed and a predefined MPLS Time-to-live value is inserted in the MPLS header.