The Mobility Models Affection on 5G MAC-protocol Simulation for Downlink Scheduler Efficiency

摘要

the fifth generation of cellular networks (5G NR) are the newest technology providing a vast spectrum of services. There are three main type of services: enhanced mobile broadband, massive machine type communication and ultra-reliable and low latency communication. The Quality of Service requirements for each of them is fulfilled by the MAC-scheduler function. Also, the users inside the gNodeB radius are not standing at the same place changing their radio conditions due to radio wave propagation properties. User movement pattern could be different for different are type (shopping mall, street, etc.). This paper is aimed to investigate the efficiency of different 5G networks scheduler approaches applying different user mobility models. It is important to consider the UEs movement during the scheduling procedure on a MAC layer. The Random Walk and Markov Chains are taken into consideration. The results show the difference between the mobility models in the matter of data rate and packet delay versus simulation time for 15 active scheduled users.