School of Specs 23.501v20.2.0

3GPP 23.501 v20.2.0 — the document's own text

S.4.2 User Plane Protocol Stacks to support N3 interface for MWAB node

Taught in 26. Relays, satellites, femtos and shared networks (The 5G system architecture, in depth).

Figure S.4.2-1: User Plane Protocol Stacks to support the N3 interface
Figure S.4.2-1: User Plane Protocol Stacks to support the N3 interface

Figure S.4.2-1 illustrates the User Plane Protocol Stacks to support the N3 interface. A PDU session between MWAB-UE and MWAB-UPF is established as a backhaul link to support the overlayed N3 interface. The N3 interface terminates at MWAB-gNB and UE-UPF, which includes GTP-U and UDP/IP layer protocols between them. A PDU session between UE and UE-UPF is realized by:

  • the Uu between UE and MWAB-gNB; and
  • the N3 between MWAB-gNB and UE-UPF on top of the backhauling PDU session between MWAB-UE and MWAB-UPF.