5G (Fifth Generation Mobile Network)

The latest deployed mobile network generation offering dramatically faster speeds (up to 10+ Gbps peak), ultra-low latency (1-10ms), and massive device connectivity enabling IoT deployments. 5G uses technologies like Massive MIMO, beamforming, and network slicing. It includes enhanced security features addressing 4G vulnerabilities. Deployment globally began in 2019-2020.

Categories: Radio Access NetworkCore NetworkIoT

5G in context

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

The mobile core carries subscriber sessions, mobility and policy. 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.

To place 5G in the wider telecom-security picture, review 5G SA, 5G NSA, A5/3, AMF, AMPS and AUSF — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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.