{"paper":{"title":"A Novel CSI-RS Reporting Scheme for RIS Optimization in O-RAN-based NextG Networks","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"A CSI-RS reporting scheme supplies complex channel data to enable RIS optimization inside O-RAN networks.","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Ali Fuat Sahin, Ali Gorcin, Ertugrul Basar, Halim Yanikomeroglu, Ibrahim Hokelek, Sefa Kayraklik","submitted_at":"2026-04-20T08:18:47Z","abstract_excerpt":"Reconfigurable intelligent surface (RIS) technology is a promising enabler for next-generation (NextG) wireless systems, capable of dynamically shaping the propagation environment. Integrating RIS within the open radio access network (O-RAN) architecture enables flexible and intelligent control of wireless links. However, practical RIS-assisted operation requires efficient acquisition and reporting of channel state information (CSI) to support real-time control from the base station side. This paper proposes a CSI reference signal (CSI-RS)-based reporting scheme for downlink complex channel in"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The proposed framework establishing CCI extraction and CSI-RS reporting procedures is experimentally validated on a real-world testbed integrating an open-source O-RAN system with an RIS prototype operating in the n78 frequency band. Experimental results demonstrate notable improvements in received signal power for both near and far users.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the tailored Hadamard and OMP algorithms integrate cleanly into O-RAN without prohibitive overhead or compatibility issues, and that the single-band testbed results will generalize to other frequencies and deployments.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A new CSI-RS reporting method for complex channel information enables RIS optimization in O-RAN systems, with experimental validation demonstrating improved received signal power.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A CSI-RS reporting scheme supplies complex channel data to enable RIS optimization inside O-RAN networks.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6a96ea6550e79d340c02285913b5de40e9c46e69ac32dc5169a570d659a0d533"},"source":{"id":"2604.17938","kind":"arxiv","version":1},"verdict":{"id":"2403c8ac-e8da-4d52-82b5-c28f1abe81ef","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T04:42:16.394043Z","strongest_claim":"The proposed framework establishing CCI extraction and CSI-RS reporting procedures is experimentally validated on a real-world testbed integrating an open-source O-RAN system with an RIS prototype operating in the n78 frequency band. Experimental results demonstrate notable improvements in received signal power for both near and far users.","one_line_summary":"A new CSI-RS reporting method for complex channel information enables RIS optimization in O-RAN systems, with experimental validation demonstrating improved received signal power.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the tailored Hadamard and OMP algorithms integrate cleanly into O-RAN without prohibitive overhead or compatibility issues, and that the single-band testbed results will generalize to other frequencies and deployments.","pith_extraction_headline":"A CSI-RS reporting scheme supplies complex channel data to enable RIS optimization inside O-RAN networks."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.17938/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_compliance","ran_at":"2026-05-20T04:35:53.940135Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"84e60d729e4b0d3fa03d16ef046c105e0d57e92624e8a24dae6e709cfd011bea"},"references":{"count":17,"sample":[{"doi":"","year":2019,"title":"Wireless communications through reconfigurable intelligent surfaces","work_id":"5252f198-bf28-4d73-a996-10f6c23071af","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"Channel estimation for RIS assisted wire- less communications—part II: An improved solution based on double- structured sparsity","work_id":"3c12641a-0177-4bb5-b486-91ce368c9f49","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"Channel estimation for RIS-empowered multi-user MISO wireless communications","work_id":"32188092-817d-4e28-93f9-f4ab340c020d","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"Intelligent reflecting surface-enhanced OFDM: Channel estimation and reflection optimization","work_id":"c68a7597-8708-47fa-948d-c2cc6ca77760","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2022,"title":"Scalable channel estimation and reflection optimization for reconfigurable intelligent surface-enhanced OFDM sys- tems","work_id":"4e814282-368b-453a-854b-d06b400bfdeb","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":17,"snapshot_sha256":"15c672ab4d50fef6de4bfc8d7c63c5325e33cb18aab13be2bbaf74352c3cedd7","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}