Question: Upon expiry of timer T320, how does a User Equipment (UE) handle cell reselection priority information in an E-UTRA network?
Option 1: The UE discards stored idleModeMobilityControlInfo and applies broadcast system information for cell reselection priority.
Option 2: The UE updates stored idleModeMobilityControlInfo with new values from the serving cell’s system information.
Option 3: The UE ignores T320 expiry and continues using previously stored RAT-inherited priority information.
Option 4: The UE initiates a random access procedure to acquire new cell reselection priority information.
Explanation: Upon T320 timer expiry, the UE discards any stored cell reselection priority information obtained from idleModeMobilityControlInfo or inherited from another Radio Access Technology (RAT). Instead, it applies the cell reselection priorities broadcast in the current cell’s system information, ensuring the UE follows the most up-to-date network preferences for efficient operation and user experience.