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During the establishment of PDU session which Network Function in 5G assigns IP Address to UE?
It is infact the SMF that assigns the IP address to the UE during PDU session establishment. However, SMF and UE cannot communicate directly. All the UE signalling to the core network is with/or via AMF. So SMF uses 5G Session Management (5GSM) protocol to assign the IP address to UE via AMF.
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Q: Why in 5G, in addition to IP PDU session type, Ethernet PDU session type was introduced?
Answer: In the IP PDU session type, the IP packets have source and destinations IP addresses in the IP header (e.g., an ipv6 adress is 128bits). As a result, this increases the size of the IP packet header. This is quite inefficient in mMTC and uRLLC use cases of 5G. In the scenario of mMTC,…