{"id":6307,"number":"25.863","type":"TR","title":"Universal Terrestrial Radio Access (UTRA); Uplink transmit diversity for High Speed Packet Access (HSPA)","series":25,"status":"Under change control","initial_release":"Rel-10","primary_group":"R4","secondary_groups":[],"portal_id":1296,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1296","dynareport_url":"https://www.3gpp.org/dynareport/25863.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=1296","bibliography_source":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv"},"detail_synced_at":"2026-10-08T00:05:00.711473+00:00","versions":[{"release":"Rel-11","version":"11.0.0","meeting":"RAN#54","upload_date":"2012-01-06","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.863/25863-b00.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":36704,"version_status":null},{"release":"Rel-10","version":"10.0.0","meeting":"RAN#48","upload_date":"2010-07-05","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.863/25863-a00.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":null},{"release":"Rel-10","version":"2.0.0","meeting":"RAN#48","upload_date":"2010-06-04","comment":"RP-100646 (shows Rel-9 on cov...","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.863/25863-200.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-10","version":"0.3.0","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-10","version":"0.2.0","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-10","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-10","first_version_date":"2010-06-04","latest_version_date":"2010-07-05","first_version":"0.1.0","latest_version":"10.0.0","version_count":5},{"release":"Rel-11","first_version_date":"2012-01-06","latest_version_date":"2012-01-06","first_version":"11.0.0","latest_version":"11.0.0","version_count":1}],"classifications":[],"work_items":[{"uid":450014,"acronym":"FS_UL-TxDiv-HSPA","effective_acronym":"FS_UL-TxDiv-HSPA","title":"Study on Uplink Tx Diversity for HSPA","responsible_groups":["R4"],"release":"Rel-10","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=1296","association_sources":[],"association_status":"historical_unverified"},{"uid":500122,"acronym":"HSPA_UL_TxDiv-CL-Core","effective_acronym":"HSPA_UL_TxDiv-CL-Core","title":"Core part: Uplink Transmit Diversity for HSPA - Closed Loop","responsible_groups":["R1"],"release":"Rel-11","status":"PCG approved","wi_level":"Building Block (2nd level)","type":"Work Item","first_release":"Rel-11","last_release":"Rel-11","provenance_type":"parsed","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20261012.zip","association_sources":["crdb"],"association_status":"source_tracked"}],"change_requests":[{"portal_cr_id":null,"cr_number":"0001","revision":null,"category":"B","impacted_version":"10.0.0","target_release":"Rel-11","title":"Evaluation results for UL CLTD","wg_tdoc":null,"wg_status":null,"tsg_tdoc":"RP-111661","tsg_status":"approved","new_version":"11.0.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null}],"relationships":[],"relationship_release_evidence_summary":[],"relationship_release_evidence":[],"relationship_release_evidence_meta":{"total":0,"returned_count":0,"limit":100,"truncated":false,"href":"/api/specs/25.863/relationship-evidence"}}