Question: For a UTRA FDD UE supporting E-DCH with 2ms TTI and HSDPA, what determines the receive characteristics of the E-DCH Relative Grant Channel (E-RGCH) in a multi-path fading environment?
Option 1: Missed UP/DOWN and missed HOLD signals
Option 2: Only erroneous detection of UP/DOWN signals
Option 3: Solely based on the TTI duration (e.g., 2ms)
Option 4: The type of release (e.g., Release 6 or later)
Explanation: In a multi-path fading environment, the reliability of the E-DCH Relative Grant Channel (E-RGCH) for UTRA FDD UEs that support E-DCH with specific configurations (2ms TTI and HSDPA) is crucial. The receive characteristics' effectiveness in such conditions is determined by two key failure scenarios: missed UP/DOWN (failing to detect a change when it occurs) and missed HOLD (erroneously detecting a change when none occurs). These scenarios comprehensively cover the potential errors in signal detection, impacting the channel's overall performance.