xApp

In telecommunications, an xApp is a microservice running on the Near-Real-Time RIC that consumes data and issues control commands to the RAN over the E2 interface, typically with sub-second loops. xApps cover use cases such as traffic steering, anomaly detection, and energy saving.

Categories: Radio Access NetworkCloud and Virtualization

xApp 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 xApp in the wider telecom-security picture, review RIC, rApp, Cloud RAN, Fronthaul, RRH and O-RAN Alliance.

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

  • Open RAN Security O-RAN xApp/rApp, E2/A1/O1 interfaces and RIC 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.