As the simulation starts, each UE moves towards their
destination. After roaming far away from the eNB1 station, the
UE starts to lose the network coverage. At this time, a UE
measurement report is send to the nearest cells to begin HO
process. After the confirmation between the target cell and the
UE, all UEs start to release their connection and perform HO
at different time as they are closer to their target base station.