With the recent IoT (Internet of Things) technology developments, new functions
are expected tothe future DIS (Disaster Information System) with IoT devices. However,
it is considered that theincreased IoT data would cause congestions for Internet
services, and it is necessary to consider theQoS (Quality of Service) controls for the
system. Therefore, this paper proposes the QoS controlmethods using the SDN (Software
Defined Network) by the classifications of IoT data transmissions.In detail, first of
all, the routing functions with the Extend Dijkstra’s algorithm is introduced. In
therouting, IoT data is classified into four categories, and the proper route is
selected by the Dijkstra’salgorithm with the QoS priority values of the classifications.
Also, the switching functions are introducedto avoid network congestion in the selected
route. In the switching, if the IoT traffic loadreaches more than 80 percent of the
maximum throughput of the selected route, the IoT data is distributedby the additional
route. The paper then reports the implementations of the prototype systemby using the
SDN, and the experiments show the effectiveness of the proposed methods.
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