Question: What triggers the measurement of failed PUCCH allocations in the PCell for SCell scheduling in Carrier Aggregation?
Option 1: Successful PUCCH allocation
Option 2: Failure of a Scell scheduling due to lack of PUCCH resources in the PCell for non-Carrier Aggregation
Option 3: Failure of a Scell scheduling due to lack of PUCCH resources in the PCell for Carrier Aggregation
Option 4: Handover from one cell to another
Explanation: The measurement is triggered when there is a failure of SCell scheduling due to insufficient PUCCH resources in the PCell specifically for Carrier Aggregation scenarios. This highlights the importance of monitoring and managing PUCCH allocations to ensure efficient use of radio resources in complex network configurations.