Fuzzy system for controlling queue size of packets in telecommunication nodes

The paper describes the increase in the efficiency of traffic transmission in data transmission networks, which is achieved by improving the maintenance of information packets in the queues of telecommunication devices. In this paper method of traffic control based on the determination of the probability of marking or packet loss in the buffer of the port of network devices is suggested. It is used as a control action on the node sending information. As a result of the action, the sending node changes the intensity of the transmitted traffic. Parameters that affect the probabilities of marking or loss of packets are processed using a fuzzy inference system in a special software controller. For correct operation of the controller, when changing the traffic load, an adaptation method based on the use of fuzzy neural networks is suggested. It allows creating control actions to adjust the membership functions used in processing the information about the queue parameters in the buffer of the network device. The effectiveness of the use of the suggested theoretical positions is shown by means of simulation modeling program NS2. Based on the results of the experiments, there is a reduction in packet loss in the buffers of network devices; the utilization factor of data transmission channels in the network is increasing.