A scalable and load-efficient implementation of an RSVP-TE in MPLS networks

As quality-guaranteed services, such as voice and streaming services, are required over Internet, traffic engineering based on an MPLS technology is being introduced. In MPLS traffic engineering, information related with service´s quality requirements is forwarded through routers on a quality-guaranteed path by an MPLS signaling protocol. Routers on the quality-guaranteed path forward traffic for the specific service under the control by its predefined quality requirements. As one of MPLS signaling protocols, RSVP-TE protocol transmits and processes periodic protocol messages for maintaining the soft state of a quality-guaranteed path. Such characteristic gives a heavy processing overhead to routers for maintaining states of large number of paths. In this paper, we implement a scalable and load-efficient RSVP-TE without dramatically increasing processing overhead. And we evaluate the processing overhead on periodic messages by implementing the RSVP-TE protocol and the reduction mechanism of periodic messages