TRAFFIC DELAY ANALYSIS IN THE FRONTHOUL SEGMENT OF 5G MOBILE NETWORKS

To ensure the required quality of traffic service in the transport segment Fron-thaul of 5G mobile networks, it is necessary to know the delays of traffic of dif-ferent priorities in the radio interface eCPRI. The mathematical apparatus of the theory of Network calculus allows one to determine the boundary estimates of delays in network models and, unlike the queue theory, does not operate with the functions of the distribution of random variables (time intervals between requests in traffic flows and the duration of service of requests in network nodes), but with fairly simple deterministic parameters describing the characteristics of the input flow and the service device. It is proposed to use approaches of Network calculus theory to obtain numerical estimates of the upper bounds of delay for various types of eCPRI interface traffic in the Fronthaul transport segment of 5G mobile networks. These theoretical results make it possible to calculate in practice the minimum required bandwidth of the Fronthaul transport segment in 5G net-works. The results of the numerical experiment show that the obtained bounda-ries of the delay of eCPRI interface traffic with different priorities in the Fron-thaul segment have great potential to help the mobile network operator in the de-ployment and operation of 5G networks.