Question: Upon expiry of timer T323, what action does a User Equipment (UE) take regarding alternative frequency priorities provided by an RRCConnectionRelease message?
Option 1: The UE updates the altFreqPriorities with new values from the latest RRCConnectionSetup message.
Option 2: The UE discards the stored altFreqPriorities and applies cell reselection priority from system information (cellReselectionPriority and cellReselectionSubPriority).
Option 3: The UE ignores T323 expiry and continues using existing altFreqPriorities for cell reselection.
Option 4: The UE initiates an immediate RRCConnectionReestablishment to receive new altFreqPriorities.
Explanation: Upon T323 timer expiry, the UE discards stored alternative frequency priorities (altFreqPriorities) from a previous RRCConnectionRelease message. It then applies cell reselection priority from system information (cellReselectionPriority and cellReselectionSubPriority), ensuring seamless connectivity and adherence to the network's configured preferences after timer expiry.