SMO (Service Management and Orchestration)

In telecom networks, the SMO is the O-RAN management framework that orchestrates RAN network functions, hosts the Non-Real-Time RIC and rApps, and manages the underlying O-Cloud through the O2 interface. It is responsible for configuration, fault, performance, and lifecycle of disaggregated RAN components.

Categories: Radio Access NetworkCore NetworkCloud and Virtualization

SMO 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 SMO in the wider telecom-security picture, review SBOM, O-Cloud, Patch Management, O2 Interface, NESAS and Operating System (OS).

Related terms

Equipment

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

Articles in the P1 mobile network security guide

Related topic hubs

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