On modeling shared service of unicast and multicast traffic with prioritization

The increase in the number of users and high network requirements have led to the need to introduce millimeter wave data transmission technology (mmWave) in order to increase data transfer speeds and minimize delays. The transition to the millimeter wave band in the fifth generation of communication networks allows the specifics of the implementation of the provision of services, including the sensitivity of directional antenna beams to radio signal blocking. In addition, when effectively planning a network providing unicast and multicast services, it is necessary to achieve a balance between opposite solutions for these two types of traffic. In this article, using the methods of the queuing theory, a mathematical model has been developed to describe the prioritization mechanism for servicing a combination of unicast and multicast traffic, for each of which the possibility of line-of-sight (LoS) blockers is regarded. The features of signal propagation are taken into account in the model by dividing the coverage area into two areas. The constructed mathematical model allows one to find analytical expressions for the probabilities of loss of unicast and multicast connections as well as the amount of occupied resource both by individual types of traffic in different areas of the coverage area and in the entire system as a whole. The method of distribution of the radio resource of the network base station is based on the balance between the listed main performance indicators which allows one to monitor compliance with quality requirements for both types of services.