Queueing system with preemptions for modeling network slicing in 5G; [СМО с прерыванием обслуживания для моделирования нарезки радиоресурсов в беспроводных сетях 5G]

In this paper, a complex model of multiservice queueing system with streaming and elastic traffic, reservation and prioritization is built to investigate the mechanism of network slicing in 5G with dynamic resource allocation. The multiservice property reflects the heterogeneity of services, technologies and equipment of 5G networks, elastic traffic models the best QoS provision, which is one of the features of slicing mechanism, and the resource reservation and preemption mechanisms for non-priority sessions take into account the heterogeneity of the QoS requirements in network slicing. The model assumes parameterization by accounting for the specifics of wireless channel. For illustration, in the article, the restrictions on the amount of resources for each class of sessions are determined for the 5G New Radio. As QoS metrics, we consider the drop probability and the pre-emption probability for each class of sessions, as well as the system resource utilization. The obtained numerical results show that the most efficient of the considered schemes is the preemptive priority scheme without resource reservation. This scheme allows to achieve 50% gain in terms of the resource requirement as compared to the schemes without preemption or with complete reservations. © 2023 Tomsk State University. All rights reserved.