Question: What is the purpose of the Nsmf_PDUSession_ContextRequest service operation in the 5G System?
Option 1: To request a new PDU Session ID from the SMF.
Option 2: To request the transfer of SM Context, such as PDN Connection Context or 5G SM Context, between I-SMF(s) or V-SMF(s).
Option 3: To notify the NF Consumer about changes in the NG-RAN configuration.
Option 4: To retrieve Small Data Rate Control Status from the SMF.
Explanation: The Nsmf_PDUSession_ContextRequest service operation is used by the NF Consumer to request the transfer of SM Context, which includes PDN Connection Context and/or 5G SM Context, between I-SMF(s) or V-SMF(s). This is necessary during mobility procedures, such as handovers or changes in the I-SMF or V-SMF, to ensure seamless communication.