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 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.

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 plus image and Helm-chart supply-chain security.

To place xApp in the wider telecom-security picture, review RIC, rApp, Cloud RAN, Fronthaul, RRH and O-RAN Alliance: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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.