Global path and bandwidth scheduling in inter-data-center IP/optical transport network

• We allow each data flow to be carried by a multi-path ODU channel.
• We allocate elastic bandwidth for each flow according to its weight, in order to maintain fairness between these flows.
• Global path and bandwidth scheduling for all the flows by the global controller.

We propose a flow-oriented global path and bandwidth scheduling scheme for inter-data-center IP/optical network. To improve the throughput of network and reduce the mutual impact between flows, we allow each flow to be carried by a multi-path optical channel data unit (ODU) channel. In addition bandwidth is allocated to flows fairly according to weight. Simulation results reveal that compared to high-priority-first mechanism, the method proposed improves average bandwidth allocation ratio by about 15% and allocation fairness between flows by 30%. Furthermore, compared to pure IP network, router ports are significantly saved and network cost can be reduced by up to 40% with scheme proposed in unified controlled IP/optical network.