Massive MIMO

Massive MIMO is a 5G New Radio technology using arrays of dozens to hundreds of antennas at the base station to serve many users simultaneously through spatial multiplexing and beamforming. It significantly increases spectral efficiency and per-cell capacity, enables targeted beams for high-frequency mmWave deployments, and shifts much of the RAN's complexity into baseband signal processing.

Categories: Radio Access NetworkCore NetworkSignaling

Massive MIMO 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 Massive MIMO in the wider telecom-security picture, review MVNO, Base Station (BS), Man-in-the-Middle (MITM), Mobile Network, VoNR and BSC.

Related terms

Related topic hubs

  • 5G Security 5G SBA, SEPP, SUCI, 5G-AKA, N32 and service-based interface security.
  • SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
  • Diameter Security 4G/LTE Diameter threats across IPX/roaming and DEA defenses.
  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.

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.