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Mobile Network Map

A curated map of the mobile network per 3GPP specifications — from the end-to-end view (UE → radio network → core → data network) down to individual segments. Nodes marked ⊕ expand into a more detailed map; all others link to their glossary definition.

Network Topology — shows the actual wiring of the network, verified against the specifications (baseline Rel-18). For conceptual relationships between terms, see the Knowledge Map.
UuN2/N3N6Core Network5G Core⊕5G Core — open detailed mapService LayerIMS⊕IMS — open detailed mapDeviceUEUEAccess NetworkNG-RAN⊕NG-RAN — open detailed mapExternal NetworksDNDN

Detailed segment maps

5G CoreTS 23.501

29 network functions (AMF, SMF, UPF, PCF, UDM, LMF…) in functional groups, the SBI bus and reference points N1–N6.

NG-RANTS 38.401

The gNB split into CU-CP / CU-UP / DU, the F1-C, F1-U and E1 interfaces, and the N2/N3 connection to the 5G Core.

IMS CoreTS 23.228

The CSCF trio (P/I/S), HSS and application servers with the Gm, Mw, Cx and ISC reference points.

Previous generations and evolution

4G EPCTS 23.401

Evolved Packet Core (Rel-8): MME, S-GW, P-GW, HSS and PCRF with the S1, S5/S8, S6a and Gx reference points.

Network Evolution2G→5G

How network elements evolved across generations: MME → AMF+SMF, S-GW/P-GW → SMF+UPF, HSS → UDM/UDR/AUSF…