PATH ESTABLISHMENT AND RESTORATION METHOD SUPPORTING DIFFERENTIAL SERVICE IN ATM BASED MPLS SYSTEM

摘要

The present invention relates to a Day TM (ATM) based on multi-protocol label switching (MPLS) routing and recovery methods to support differentiated services according to the priority of traffic in the event of a failure of a link or node on the working path.; The present invention, set the ATM-based if the first EF service traffic priority is high on the MPLS system operation basic Label Switch Protocol (LSP) connection path and redundant path of recovery LSP connection of the working path and lower priority AF or for DF service traffic and set the default path of the working LSP connections for AF or DF service traffic. Thus, after the setting, in case of link fault EF service traffic and forwards through the set recovery LSP connection AF or DF service traffic is forwarded through the recovery path to the primary LSP connection.; According to the present invention, it is possible to rapidly and significantly improve the quality of service by restoring high reliability traffic having a high priority traffic in the event of a failure in a link or node of the working path.