Question: Upon receiving SIB9 with eventID-TSS, what action(s) does a UE (User Equipment) take if the storedEventID value within VarEventID matches the eventID-TSS value received in SIB9, and there is an existing entry for storedGnbID in VarGnbID that also matches the gNB identity from SIB1?
Option 1: The UE considers the clockQualityDetailsLevel unchanged, updates storedEventID, and notifies upper layers of a potential change.
Option 2: The UE takes no action regarding clockQualityDetailsLevel but updates both storedEventID and storedGnbID in VarEventID and VarGnbID respectively.
Option 3: The UE neither updates storedEventID nor storedGnbID, nor notifies upper layers about potential changes to clockQualityDetailsLevel.
Option 4: The UE always replaces the stored values and notifies upper layers of a change, regardless of matching values.
Explanation: According to the specifications, if the storedEventID value within VarEventID is the same as the eventID-TSS received in SIB9 (indicating no change in the event ID), and if there's an existing, matching entry for storedGnbID in VarGnbID (implying the gNB identity hasn't changed based on SIB1), the UE does not need to consider the clockQualityDetailsLevel as having changed, nor is there a need to update these stored values or notify upper layers about potential changes. This scenario implies stability in both event and gNB identities, hence no action is required regarding these aspects.