{"ID":23664238,"CreatedAt":"2026-09-18T08:14:42.696445972Z","UpdatedAt":"2026-09-18T08:14:42.696445972Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2609.20640","arxiv_id":"2609.20640","title":"RUN-O-RAN: An O-RAN-Native Architecture Enabling Cooperative Uplink Localization","abstract":"Accurate positioning is increasingly required in indoor and dense urban environments; nonetheless, satellite-based systems are not always available, and standardized 5G localization solutions remain difficult to deploy with commercial devices. This paper presents RUN-O-RAN, an O-RAN-native framework that enables network-centric uplink localization using standard Sounding Reference Signal (SRS) transmissions from commercial 5G devices. RUN-O-RAN xApp coordinates serving and neighboring base stations, enabling non-serving base stations to retrieve SRS-based uplink timing measurements that would be unavailable in conventional RAN deployments, without modifying the UE or existing 3GPP signaling procedures. The framework combines cooperative SRS collection, first-path time-of-arrival estimation, timing-advance tracking, clock-drift compensation, and multi-anchor position estimation into a complete network-side localization service. Experimental evaluation over $150,000$ SRS transmissions validates the proposed framework, achieving meter-level localization under diverse propagation conditions while revealing the impact of anchor geometry and multipath on positioning accuracy. These findings demonstrate that cooperative SRS-based localization can be realized within the O-RAN ecosystem without modifying commercial UEs, providing a practical foundation for future network-native ISAC positioning services.","short_abstract":"Accurate positioning is increasingly required in indoor and dense urban environments; nonetheless, satellite-based systems are not always available, and standardized 5G localization solutions remain difficult to deploy with commercial devices. This paper presents RUN-O-RAN, an O-RAN-native framework that enables networ...","url_abs":"https://arxiv.org/abs/2609.20640","url_pdf":"https://arxiv.org/pdf/2609.20640v1","authors":"[\"Viola Bernazzoli\",\"Alberto Ceresoli\",\"Ilario Filippini\"]","published":"2026-09-17T16:23:34Z","proceeding":"cs.NI","tasks":"[\"cs.NI\"]","methods":"[]","has_code":false}