Q3 Single choice Flag Which statement about idle mode signaling reduction in the LTE network is true? A ISR support is not mandatory for UEs that support GERAN/UTRAN. B ISR requires special functionality on the UE and the core network nodes (MME, SGSN, and S-GW). C ISR requires special functionality on the UE and the core network nodes (MME and SGSN). D Gn/Gp SGSN supports idle mode signaling reduction functionality. Correct answer