Again, don't confuse if study cellular, because so many term and acronyms. Even each interface have the name, so many interface name. Start from the EPS, 6 interface in simple architecture. All interface is separated by two functional, payload (user plane) and signalling (control plane).
- Signalling (control plane): S1-MME, S11, s6a
- Payload (user plane): S1-U, S5, Gi/SGi
This figure of simple architecture of the EPS with interface name
This another figure of the EPS with interface name
Please refer to Packet Core Glossary for some term.
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