Jul 2026· International Conference on Ubiquitous and Future Networks· pp. 233-237· 1 citation· 16 references
Abstract
The Open Radio Access Network (O-RAN) NearReal-Time RAN Intelligent Controller (Near-RT RIC) hosts xApps that perform per-User-Equipment (UE) closed-loop control over the E2 interface, and proactive control of handover, scheduling, and anomaly response depends on the freshness of the underlying counters. Surveyed per-UE xApps that explicitly describe their E2 binding rely on Periodic Report subscriptions through E2 Service Model for Key Performance Measurement (E2SM-KPM), which forces every measurement to wait for a configured reporting period before reaching the Near-RT RIC. This paper surveys seven per-UE Near-RT RIC xApp works published between 2023 and 2026 and aligns them with the Measurement Event trigger style introduced in E2SM-KPM v7.0 (2025). The new trigger style enables cell-condition-gated per-UE reporting through REPORT Service Styles 3 and 5, while perUE-bound event conditions remain explicitly out of scope and constitute a clean specification-evolution opportunity. Closing the gap between Periodic-only xApp practice and the Measurement Event primitive opens a class of event-driven per-UE xApps that the current control loop cannot support.
This paper proposes CORMO-RAN, a data-driven orchestrator that dynamically activates compute nodes based on xApp load to save energy, and performs lossless migration of xApps from nodes to be turned off to active ones while ensuring xApp availability during migration.
Antonio Calagna, Stefano Maxenti, Leonardo Bonati et al.· IEEE Transactions on Mobile...· 2 citations
Results show that online twin-fidelity monitoring enables robust digital-twin-assisted xApp conflict resolution while preserving utility-aware throughput-power optimization, and achieves the closest throughput-power trade-off to the optimum across operator energy priorities.
Akram A. Almohammedi, Mohammed Balfaqih, Sam Darshi et al.· arXiv.org· 0 citations
Real-time control loops in Open RAN are increasingly colocated with the gNB, where dApps, i.e., programmable applications with sub-millisecond access to PHY- and MAC-layer signals, enable latency-critical use cases such as spectrum sharing, channel-aware scheduling, and integrated sensing. What turns dApps from a per-v...
Angelo Feraudo, Ravis Shirkhani, Stefano Maxenti et al.· 0 citations
The E2 interface and its associated E2 Service Models (E2SMs) are the primary mechanisms through which the Near-Real-Time RAN Intelligent Controller (Near-RT RIC) observes and controls Radio Access Network (RAN) behavior in O-RAN. Despite their central role in enabling xApp-driven closed-loop optimization, the structur...
Pratheek S. Upadhyaya, Connor McPeak, Nishith D. Tripathi et al.· IEEE Access· 0 citations
The nascTime framework on OMNeT++/Simu5G is used to evaluate how many TSN endpoints a single 5G NR cell can bridge before per-flow QoS degrades, showing that sub-3 ms TSN deadlines may require radio-configuration changes such as configured grants or higher numerology.
Mohamed A. M. Seliem, U. Roedig, C. Sreenan et al.· 0 citations
Open RAN emerged to break out of vendor lock-in constraints, enabling specialized control-plane applications with well-defined open and standardized interfaces. In a monitoring-oriented Real-Time Radio Access Network Intelligent Controller, xApps typically collect Key Performance Indicators (KPIs) at fixed intervals, w...
Matheus Dória, Ricardo Silva, Carlos Lima et al.· IEEE Transactions on Network...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
