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full Table of Contents for  TS 23.501  Word version:   16.3.0

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1…   3…   4…   4.2.4   4.2.5…   4.2.8            4.2.9…   4.3…   4.3.3   4.3.4   4.3.5   4.4…   4.4.6…   4.4.8   5…   5.4…   5.6…   5.7…   5.8…   5.10…   5.16…   5.17   5.18…   5.27…   5.31   5.32   5.33   5.34   5.35…   6…   6.3…   7…   7.2…   8…   8.2.4   8.2.5…   8.3…   A…   D…   E…   F   G…   G.3   G.4…

 

8.3  User Plane Protocol Stacks
8.3.1  User Plane Protocol Stack for a PDU Session
PDU layer: This layer corresponds to the PDU carried between the UE and the DN over the PDU Session. When the PDU Session Type is IPv4 or IPv6 or IPv4v6, it corresponds to IPv4 packets or IPv6 packets or both of them; When the PDU Session Type is Ethernet, it corresponds to Ethernet frames; etc.
GPRS Tunnelling Protocol for the user plane (GTP-U): This protocol supports tunnelling user data over N3 (i.e. between the 5G-AN node and the UPF) and N9 (i.e. between different UPFs of the 5GC) in the backbone network, details see TS 29.281. GTP shall encapsulate all end user PDUs. It provides encapsulation on a per PDU Session level. This layer carries also the marking associated with a QoS Flow defined in clause 5.7. This protocol is also used on N4 interface as defined in TS 29.244.
Reproduction of 3GPP TS 23.501, Figure 8.3.1-1: User Plane Protocol Stack
Figure 8.3.1-1: User Plane Protocol Stack
8.3.2  User Plane for untrusted non-3GPP AccessWord-p. 370
Reproduction of 3GPP TS 23.501, Figure 8.3.2-1: User Plane via N3IWF
Figure 8.3.2-1: User Plane via N3IWF
8.3.3  User Plane for trusted non-3GPP Access [R16]
Reproduction of 3GPP TS 23.501, Figure 8.3.3-1: User Plane via TNGF
Figure 8.3.3-1: User Plane via TNGF
8.3.4  User Plane for W-5GAN Access [R16]Word-p. 371
The user plane for W-5GAN is defined in Clause 6 of TS 23.316.
8.3.5  User Plane for N19-based forwarding of a 5G VN group [R16]
Reproduction of 3GPP TS 23.501, Figure 8.3.5-1: User Plane for N19-based forwarding
Figure 8.3.5-1: User Plane for N19-based forwarding

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