{"id":6315,"number":"25.871","type":"TR","title":"Uplink Multiple Input Multiple Output (MIMO) for High Speed Packet Access (HSPA)","series":25,"status":"Under change control","initial_release":"Rel-11","primary_group":"RP","secondary_groups":["R1"],"portal_id":1304,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1304","dynareport_url":"https://www.3gpp.org/dynareport/25871.htm","publication_scope":null,"radio_technologies":[],"first_seen_at":"2026-09-16T11:04:52.956817+00:00","updated_at":"2026-10-16T09:34:55.609033+00:00","raw_metadata":{"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1304","bibliography_source":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv"},"detail_synced_at":"2026-10-08T00:05:16.015485+00:00","versions":[{"release":"Rel-11","version":"11.0.0","meeting":"RAN#53","upload_date":"2011-09-27","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.871/25871-b00.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":null},{"release":"Rel-11","version":"1.0.2","meeting":"-","upload_date":"2011-09-26","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.871/25871-102.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"0.2.0","meeting":"-","upload_date":"2011-09-26","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.871/25871-020.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"2.0.0","meeting":"RAN#53","upload_date":"2011-09-17","comment":"RP-111239","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.871/25871-200.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"1.0.1","meeting":"-","upload_date":"2011-06-22","comment":"R1-111865","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.871/25871-101.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"1.0.0","meeting":"-","upload_date":null,"comment":"","official_file_url":null,"source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"0.1.1","meeting":"-","upload_date":null,"comment":"","official_file_url":null,"source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-11","version":"0.1.0","meeting":"-","upload_date":null,"comment":"","official_file_url":null,"source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"}],"release_presence":[{"release":"Rel-11","first_version_date":"2011-06-22","latest_version_date":"2011-09-27","first_version":"0.1.0","latest_version":"11.0.0","version_count":8}],"classifications":[],"work_items":[{"uid":500014,"acronym":"FS_UTRA_UL_MIMO","effective_acronym":"FS_UTRA_UL_MIMO","title":"Study on Uplink MIMO","responsible_groups":["R1"],"release":"Rel-11","status":"PCG approved","wi_level":"Feature (1st level)","type":"Work Item","first_release":null,"last_release":null,"provenance_type":"official","source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1304","association_sources":[],"association_status":"historical_unverified"}],"change_requests":[],"relationships":[],"relationship_release_evidence_summary":[],"relationship_release_evidence":[],"relationship_release_evidence_meta":{"total":0,"returned_count":0,"limit":100,"truncated":false,"href":"/api/specs/25.871/relationship-evidence"}}