Question: For a User Equipment (UE) supporting 256QAM in Downlink (DL), what is the implication of supporting an alternative Transport Block Size (TBS) index, specifically ITBS 33B?
Option 1: It enables the UE to support up to 64QAM in Uplink (UL) transmissions.
Option 2: It allows for more efficient downlink data transmission by providing an additional TBS index for 256QAM-supported UEs.
Option 3: It requires the UE to fallback to a lower modulation scheme (e.g., from 256QAM to 64QAM) in poor coverage areas.
Option 4: It has no impact on the UE's ability to handle different modulation schemes but affects voice call quality.
Explanation: Supporting an alternative TBS index like ITBS 33B for UEs that already support 256QAM in Downlink enhances the efficiency of data transmission. This is because additional TBS indices can offer more granular control over payload sizes, optimizing the use of available bandwidth and improving overall network performance for high-modulation scheme capable devices.