Mobile Network

A mobile network is a cellular network providing voice, messaging, and data services to subscribers via radio. It comprises the radio access network (BTS/Node B/eNB/gNB), the core network (MSC/SGSN/MME/AMF and supporting databases), interconnect to other operators, and OSS/BSS. Each generation (2G/3G/4G/5G) defines its own architecture, security model, and capabilities.

Categories: Radio Access NetworkCore NetworkSignaling

Mobile Network in context

The radio access network is the layer where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations, downgrade attacks and jamming, and defenses hinge on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

The mobile core is where subscriber sessions, mobility and policy live. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF. Core exposure is the difference between a single-subscriber leak and a fleet-wide breach.

To place Mobile Network in the wider telecom-security picture, review MVNO, 5G SA, AMF, Base Station (BS), CAPEX and Fuzzing.

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More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.