Question: In a heterogeneous E-UTRA environment with various UE capabilities and frequency bands, what approach can E-UTRAN utilize to minimize unnecessary activations of the UE's measurement entity?
Option 1: Configuring all UEs to measure all available RATs (Radio Access Technologies) and frequency bands.
Option 2: Informing E-UTRAN about UE capabilities for tailored measurement control, preventing unwarranted activation of the measurement entity.
Option 3: Implementing a fixed number of measurement criteria across all UEs regardless of their capabilities.
Option 4: Disabling periodic reporting criteria for all UEs to reduce measurement load.
Explanation: This approach is efficient because knowing the UE's specific capabilities allows E-UTRAN to customize its control, thereby preventing the unnecessary waking up of the measurement entity. This targeted management reduces overall measurement and control load, aligning with the goal of minimizing UE measurement load in a heterogeneous environment.