4. DEVS MODEL ARCHITECTURE The model is designed to represent the properties of BS antennas, and UEs as well as the area, movement of UEs and BS antenna deployment layout. These specifications have been extracted from 3GPP technical report release of June 2012 [13].
4.1. Model Specifications Figure 2 illustrates the DEVS block diagram of the mo- bile network model. The model is composed of three major components: UE Manager, BS Manager, and Stats. The UE Manager is a coupled component composed of three atomic components: UE Registry takes care of generating and deactivating the UEs as well as controlling the location, movement, speed, and links between the UEs and the BSs in their range. UE Generator and UE Deq atomic components notify UE Registry regarding generation or deactivation of UEs. Figure 3 shows the DEVS-Graph state diagram of the UE Registry atomic component. The UE Registry is initially in idle state for 10 ms then it updates the UE positions and links and generates the number of UEs and links as output to Stats and goes back to idle state. While it is in idle state it can also be notified by UE Generator and UE Deq atomic components to produce a UE or deactivate a UE.