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Author

Mohammad Shojafar

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Preprint Sep 2026

rApp/xApp Attestation: A New Security Use Case for O-RAN

The disaggregation and softwarization introduced by the Open Radio Access Network (O-RAN) architecture enable multi-vendor innovation but also expose the RAN Intelligent Controller (RIC) ecosystem to new runtime security risks. Existing O-RAN specifications define strong safeguards for onboarding, authentication, ident...

Hamed Alimohammadi, B. Şahin, Arda Akman et al. · 0 citations
2026

Service-Oriented Attention HAPPO for xApps Coordination in Digital Twin-Enabled AI-RAN

Coordinating multiple heterogeneous xApps in Open Radio Access Networks (O-RAN) is challenging because real-time inter-xApp synchronization introduces communication overhead, latency, and scalability bottlenecks under live deployments. This paper proposes an attention-based Heterogeneous-Agent Proximal Policy Optimizat...

Zhizhou He, Mohammad Shojafar, Rahim Tafazolli · 0 citations

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