O2 Interface (O-RAN SMO to O-Cloud Interface)

O2 Interface 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.

Moving network functions off dedicated hardware into NFV, Kubernetes and Open RAN reshapes the threat model. Isolation now depends on hypervisor, container and service-mesh controls, and supply-chain security around images, Helm charts and RIC xApps becomes as important as protocol-layer defenses.

To place O2 Interface in the wider telecom-security picture, review O-Cloud, Fronthaul, SMO, IGW, O-RAN Alliance and O-RAN Interfaces (A1, E2, O1, O2).

Related terms

• O-Cloud
• Fronthaul
• SMO
• IGW
• O-RAN Alliance
• O-RAN Interfaces (A1, E2, O1, O2)
• O-CU
• O-RU

Equipment

O-RAN units and RIC (O-RU, O-DU, O-CU, RIC, SMO)

• A1 Interface
• Cloud RAN
• E2 Interface
• Fronthaul
• Midhaul
• Near-RT RIC
• Non-RT RIC
• O-Cloud
• O-CU
• O-DU
• All 21 terms

Articles in the P1 mobile network security guide

Related topic hubs

• Open RAN Security O-RAN xApp/rApp, E2/A1/O1 interfaces and RIC security.
• VoLTE Security IMS/VoLTE signaling risk: SIP, IMS-AKA, media plane attacks.
• IMS Security Training Training on IMS, VoLTE/VoNR, SIP and RCS security.
• NAS Security Non-Access Stratum security, integrity and ciphering algorithms.

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.