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(in English) OSPF is a popular routing protocol in the Internet. OSPF cause traffic congestion at nodes where heavy traffics concentrate. It can't be avoided dynamically, even if there is room in the other. paths. We proposed routing method using by available bandwidth. However, when network traffic increases, the proposed method uses the detour route more frequently. To decrese delay time, we proposed routing method to assign priority route for high-priority traffic.

This report proposes a method which is applied to high-priority traffic. Simulation results show that the proposed method has higher throughput than that of OSPF. The proposed method was able to suppress delay time within 60msec.