Traffic Routing Between Best Effort Network and Premium Network

Korean operators have started BcN implementation by replacement of old PSTN with access gateway. While, existing IP network has been expanded according to the increase of ADSL subscribers, metro Ethernet and various VoIP subscribers. New premium IP backbone for BcN and composite services has been installed and expanded based on MPLS functions, so one operator has two IP networks. Operator needs to have specific implementation plan for interoperation between new premium IP network and old best effort network and should consider many important issues. Here, traffic routing method is mentioned for route selection between premium IP network and best effort network from BcN and best effort subscribers according to the application services