Question: Under what conditions is a UE (User Equipment) in RRC_CONNECTED mode, specifically a BL (Battery Life) UE or a UE in Coverage Enhancement (CE), required to acquire system information, excluding handover scenarios?
Option 1: Upon receiving a notification that the system information has changed or upon return from out of coverage.
Option 2: When T311 timer is running or when receiving a request from CDMA2000 upper layers.
Option 3: When T311 timer is running.
Option 4: Upon receiving an indication about the presence of an ETWS notification or upon exceeding the maximum validity duration.
Explanation: According to specifications for RRC_CONNECTED mode, BL UEs and UEs in Coverage Enhancement (CE) are required to acquire system information when the T311 timer is running. This highlights the importance of maintaining up-to-date system information during specific operational states for seamless connectivity and service provision. The T311 timer's role underscores its significance in managing the UE's connection state, particularly for devices with enhanced power-saving requirements or those operating in areas with challenging coverage.