Deflection routing scheme for GMPLS-based OBS networks

Integrating the Generalized Multi-Protocol Label Switching (GMPLS) framework into an Optical Burst Switching (OBS) Control Plane is a promising solution to alleviating most of OBS performance and design issues. However, implementing the already proposed OBS deflection routing schemes is not applicable in such an integrated solution. This is due to the existence of already established Label Switched Paths (LSPs) between edge nodes in a GMPLS-based OBS network which guide the Data Burst Headers (DBHs) through the network. In this paper we propose a novel deflection routing scheme which can be implemented in GMPLS-based OBS Control Plane. In this scheme, deflection routes or LSPs are designed and pre-established for the whole network. The ingress nodes are responsible for enabling DBHs for deflection at contending core ports prior to DBHs transmission. Moreover, we propose an object extension for Path and Resv messages of the RSVP-TE protocol to be able to utilize both messages for deflection labels dissemination. The scheme simulation results show reduction in data bursts blocking probability.