Patent ID: 6496476
Filing Date: 2002-12-17
Classification: H04J,H04L,H04Q

Abstract:
For communicating a description of intact portions of a failed path of a telecommunications network having an origin node and a destination node, a method comprising the steps of:a) each custodial node, adjacent to the failed portion of said path, providing its node ID in a route information field of a reuse message and sending said reuse message to intermediate nodes downstream thereof; b) each intermediate-node, upon receipt of said reuse message appending its node ID to said reuse message and sending said reuse message to other nodes downstream thereof; and c) either the origin node or the destination node of said failed path, in receipt of said reuse message, reading from said reuse message the intermediate and custodial node IDs contained therein, wherein the read intermediate and custodial IDs provide the description of the intact portions of said failed path and wherein the intact portions of the failed path are used for restoring only the failed path to a non-failed state.