Question: In CELL_FACH state with DRX, when using absolute priority based reselection, what triggers the UE to search for all E-UTRA layers at a potentially lower frequency than Thigher_priority_search?
Option 1: SrxlevServingCell > Sprioritysearch1 and SqualServingCell > Sprioritysearch2
Option 2: SrxlevServingCell <= Sprioritysearch1 or SqualServingCell <= Sprioritysearch2
Option 3: Allocation of E-DCH resources to the UE
Option 4: Expiration of timer T321
Explanation: According to the rules for absolute priority based reselection in CELL_FACH state with DRX, if the serving cell's signal level (Srxlev) is less than or equal to Sprioritysearch1 or its quality (Squal) is less than or equal to Sprioritysearch2, the UE is required to search for all E-UTRA layers. This ensures the UE actively seeks better alternatives when the current serving cell does not meet certain priority thresholds, potentially leading to a handover or cell reselection for improved service quality.