Question: Under what condition, related to message size, will a UE (User Equipment) capable of UL (Uplink) RRC (Radio Resource Control) message segmentation initiate the segmentation procedure in an RRC_CONNECTED state?
Option 1: When the encoded RRC message is smaller than the minimum supported size of a PDCP (Packet Data Convergence Protocol) SDU (Service Data Unit).
Option 2: If the RRC message segmentation is disabled based on the field `rrc-SegAllowed`.
Option 3: When the network explicitly requests segmentation for all messages, regardless of size.
Option 4: If the encoded RRC message exceeds the maximum supported size of a PDCP SDU.
Explanation: This is correct because one of the conditions for initiating the UL RRC message segmentation procedure is that the encoded RRC message must be larger than the maximum supported size of a PDCP SDU, ensuring efficient transmission by breaking down large messages into manageable segments.