Patent ID: 7095712
Filing Date: 2006-08-22
Classification: H04L

Abstract:
1. A protection path setup method comprising the steps of: (a) setting up a working path from a start-point node to an end-point node; and (b) setting up a plurality of protection paths by taking a plurality of nodes on said working path as respective start points at the time of setting up said working path, wherein step (a) includes the substeps of: transferring a working path setup request message containing therein a protection path request from a start point to an end point of said working path along a route of said working path being set up; and setting up said working path by transferring a working path setup response message from the end point to the start point of said working path in response to said working path setup request message, and step (b) includes the substeps of: transferring a protection path setup request message from a start point to an end point of each of said plurality of protection paths in response to said protection path request contained in said working path setup request message; and setting up each of said plurality of protection paths by transferring a protection path setup response message from the end point to the start point of said each protection path in response to said protection path setup request message.