Abstract
Decoupling characteristics of Software Defined Network(SDN) control plane and data plane provides us with a new idea to improve dynamic routing. SDN controllers can easily obtain the global situation of the whole network. The network topology information and bandwidth data are applied to the classical Dijstra algorithm. During the computation of the optimal path, the bandwidth of the path in the entire topology is dynamically updated. Differed from the normal dynamic routing strategy, the routing strategy releases the occupied bandwidth in the shortest possible time according to the transmission delay. The simulation results demonstrate that the dynamic routing strategy can greatly improve the bandwidth utilization and quality of service.
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