Performance Model for 4G/5G Networks Taking into Account Intra- and Inter-Cell Mobility of Users

Abstract

In this paper, we investigate the influence of intraand inter-cell mobility of users on performance of 4G/5G cellular networks, such as LTE and LTE-A. To this end, we develop a multi-class PS queue model that captures mobility of users between zones of a cell and between cells, through a simple mobility model, that is decoupled from the cell model itself, enabling to directly apply the approach to more realistic mobility patterns. We first show that this model is consistent with known analytical bounds corresponding to a system with either static users or users having an infinite speed. We then compare our model to simulations for more realistic speeds, and show that it provides user and cell performance with a very good accuracy. The outcomes of our model confirm that mobility may improve both users and cells performance, and enable to quantify the gain as a function of users speed.

Flow level performance evaluation in mobile networks: Analytical modeling and empirical validation

“…Other models like that proposed in [16] use an arithmetic mean of throughputs as a measure for the capacity, the main arguments being that user mobility allows observing several radio conditions during a communication, thus preventing user accumulation at cell edge. Recent works have extended Processor sharing models to adaptive streaming traffic [19] and to different scheduling schemes [1], or to take into account mobility of users [4]. These models have also been extended to the cell coordination schemes in HSPA networks [18].…”