An integrated multilayer traffic engineering scheme in the new generation GMPLS based optical Internet

This paper proposes a new scheme for multi-layer traffic engineering (MTE) in generalized multi-protocol label switching (GMPLS) IP over optical networks. The scheme routes IP traffic guaranteeing sufficient bandwidth, high transmission quality and low resource usage. The routing decision is made via a cost metric which considers lightpath´s power penalty and propagation delay and number of available wavelengths and transmitters. The requests are accommodated on mixed (lambda and packet) GMPLS label switched paths (LSPs) installed by nested RSVP-TE sessions. Extensive simulations demonstrate the good quality of the scheme´s performance in terms of blocking probability and resource usage.