Моделирование процесса передачи трафика реального времени с использованием планировщика и функцией контроля доставки в программно-конфигурируемых сетях

Abstract

The article is described a model of the real-time traffic transmission process using a scheduler and a delivery control function in software defined networks (SDN) based on Petri nets and the CPN Tools package. The Petri subnets of the traffic scheduler, the delivery time validator have been developed and described, the subnets of the flow tables have been modified, the subnets of the comparison and search rules in the flow table, traffic classification, queues and queue manager have been modified. Experimental modeling was carried out with different switch loads, and the results of the developed method were compared with the classical method of transmitting heterogeneous traffic to a SDN. According to the data obtained, the method of the process of transmitting real-time traffic using a scheduler and a delivery control function to a SDN has proven its effectiveness. The effectiveness of the proposed method lies in the fact that the load of the switch remains constant due to a more flexible configuration of the scheduler schedule, rather than rigid time intervals of timeouts, and the possibility of early transmission of elastic traffic is also realized until the time of delivery of real-time traffic has come.