LTE performance with variable number of users per transmission time interval along with AMS

Increased data traffic in mobile systems requires new solutions in all aspects of modern cellular systems. In order to fulfill user demands, Long Term Evolution (LTE) concurs with modern mobile system as network bearing the 4G titer. The target of this paper is to investigate performance of Adaptive MIMO Switching (AMS) in LTE in terms of intersite spacing and variable number of users per Transmission Time Interval (TTI). The assessment has been done by simulating radio channel with Kronecker´s analytical model with the assumption that Channel State Information (CSI) was absent at transmitter side. Impact of serving varying number of users per TTI on required interference margin in cell with different intersite spacing was also analyzed in this paper. Simulation results reveal the impact of varying number of users per Transmission Time Interval (TTI) on the cell level throughput, required interference margin in the cell, and the probability of no data transfer at the cell level. All results are shown with respect to the operation of AMS in LTE. A compromise is needed in choosing the number of users to be served per TTI to provide better throughput with low probability of no data transfer.