Method for sharing backup path in MPLS network, label switching router for setting backup in MPLS network, and system therefor

A method for sharing a backup path in a MultiProtocol Label Switching (MPLS) network, the method comprising the steps of:

• setting a working path between a source node and a destination node;
• and
• allocating bands for a backup path of the set working path taking into account a backup path of other working path sharing a link with the set working path when the backup path of the set working path is set.

A system for setting a backup path in a MultiProtocol Label Switching (MPLS) network, the system comprising:

• a source router for receiving a label mapping message including information about at least one existing working path sharing at least one link with a current working path, searching information a about backup path of the at least one existing working path, adding the information about the searched backup path to a label allocation request message for setting a backup path, and transmitting the label allocation request message with the information to an intermediate node;
• and
• an intermediate router for allocating a band for the backup path to be set using the information added to the label allocation request message received from the source router and path information previously stored therein.