Routing mechanisms for IP over OBS-WDM optical networks

In this paper, we combine optical burst switching (OBS) for managing congestions and multiprotocol label switching (MPLS) for handling routing and quality of service (QoS). The performance of two control plane mechanisms such as MPLS explicit routing and interior gateway protocol (IGP) shortest path are examined and numerical results are presented on the throughput and the round trip time (RTT). Using MPLS explicit routing the throughput is 42 percent higher than that for the IGP protocol and the RTT demonstrates an improvement of 57 percent compared IGP shortest path. In addition, the average RTT time for IGP is six times higher with the explicit routing MPLS. Therefore, it is proven that improved QoS for IP over OBS-WDM networks is achieved using MPLS explicit routing.