Question: For a User Equipment (UE) with High-Speed Downlink Packet Access (HSDPA) capability, supporting categories 1-12, what determines the reporting accuracy of the Channel Quality Indicator (CQI) in Additive White Gaussian Noise (AWGN) environments?
Option 1: Only the reporting variance
Option 2: Solely the Block Error Rate (BLER) performance of the indicated transport format
Option 3: Both the Signal-to-Noise Ratio (SNR) and the UE's transmit power
Option 4: The combination of the reporting variance and the BLER performance using the transport format indicated by the reported CQI median
Explanation: In AWGN environments, the accuracy of Channel Quality Indicator (CQI) reports relies on both the precision of the UE's channel condition reports (reporting variance) and the reliability of data transmission over the reported channel quality (BLER performance of the transport format indicated by the CQI median), thus considering both aspects provides a comprehensive measure of CQI reporting accuracy.