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 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 Massive MIMO in the wider telecom-security picture, review 5G SA, AMF, Base Station (BS), Capacity Planning, CAPEX and CSCF — 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.