Development and Analysis of Algorithms for Measuring of Communication Links Parameters in Internet of Things Software Defined Networks

The article considers methods for measuring parameters of communication links connecting OpenFlow switches in software defined networks of the Internet of Things to ensure the operation of dynamic routing algorithms. Theoretical information on the parameters of communication links that ensure quality of service in the network and methods for measuring them using a network controller are given. Step-by-step algorithms for implementing measurement of delay, packet loss percentage, bandwidth and load of communication links using the Ryu controller are given. Experimental studies confirming the operability of the presented algorithms are conducted. A comparison of the proposed algorithms with the operation of other utilities for measuring communication links parameters, such as Ping and Iperf3, is carried out. It is shown that the quality of the proposed algorithms for measuring delay and packet loss percentage using the controller show similar results to the quality of the Ping and Iperf3 utilities. The limitations imposed on the operation of the presented algorithm for measuring the bandwidth of communication links are shown. This study is an integral part of the project on developing intelligent algorithms for dynamic routing in software defined networks.