Question: For an IAB-DU (Integrated Access and Backhaul - Donor Unit) supporting multiple carriers through carrier aggregation, how are its performance requirements primarily defined?
Option 1: As a cumulative sum of individual carrier requirements
Option 2: Based on the worst-case scenario among all aggregated carriers
Option 3: Exclusively for the primary component carrier
Option 4: In terms of single carrier requirements
Explanation: This is because, unless otherwise stated, performance requirements apply for a single carrier only. Even for an IAB-DU that supports carrier aggregation, requirements are defined in terms of single carrier requirements, simplifying evaluation by not requiring complex cumulative or comparative analyses across multiple carriers, ensuring consistency and clarity in assessing the device's capabilities.