Patent ID: 6738354
Filing Date: 2004-05-18
Classification: A61B,A61N,G10K,H04L,H04Q

Abstract:
A method of label selection for end-to-end transport of label switched traffic through a communications network between a source node and a destination node, the method comprising the steps of:a) launching a request message toward the destination node from the source node, the request message including a label list having one or more label identifiers indicative of respective corresponding labels available for use by the source node; and b) revising the label list at each successive hop between the source node and the destination node, based on labels available for use by each respective hop, to produce a reduced label list; whereby the reduced label list includes any label identifiers indicative of respective corresponding labels available for end-to-end transport of label switched traffic between the source node and the destination node; and wherein the communications network uses wave division multiplexing (WDM) for transport of said label switched traffic, the label switched traffic made up of packets containing labels used to switch the packets between the source node and the destination node, each label comprising a respective data transport wavelength.