Question: What does a value of '1' in the TRS availability indication field bitmap signify for a UE in RRC_IDLE or RRC_INACTIVE state, regarding associated TRS resource sets?
Option 1: Immediate activation of all TRS resource sets for an indefinite duration.
Option 2: Presence of associated TRS resource sets for a single frame starting from the current SFN.
Option 3: Presence of associated TRS resource sets for a multiple of frames (determined by validityDuration or default 2) starting from a specific SFN within the DRX cycle.
Option 4: Permanent deactivation of the indicated TRS resource sets.
Explanation: A value of '1' in the bitmap indicates that associated TRS resource sets are present for a specified multiple of frames (either as provided by validityDuration or, if not provided, a default multiple of 2), starting from an SFN within the Discontinuous Reception (DRX) cycle. This impacts network efficiency and UE power management in idle or inactive states.