{"id":6345,"number":"25.905","type":"TR","title":"Feasibility study on improvement of the Multimedia Broadcast/Multicast Service (MBMS) in UTRAN","series":25,"status":"Under change control","initial_release":"Rel-7","primary_group":"RP","secondary_groups":["R2"],"portal_id":1337,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1337","dynareport_url":"https://www.3gpp.org/dynareport/25905.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=1337","bibliography_source":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv"},"detail_synced_at":"2026-10-08T00:07:06.196592+00:00","versions":[{"release":"Rel-7","version":"7.2.0","meeting":"RAN#38","upload_date":"2008-01-07","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-720.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":18119,"version_status":null},{"release":"Rel-7","version":"7.1.0","meeting":"RAN#36","upload_date":"2007-07-25","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-710.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":17776,"version_status":null},{"release":"Rel-7","version":"7.0.0","meeting":"RAN#34","upload_date":"2006-12-22","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-700.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":null},{"release":"Rel-7","version":"2.1.0","meeting":"RAN#34","upload_date":"2006-12-14","comment":"RP-060849 but document not pr...","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-210.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-7","version":"2.0.0","meeting":"RAN#34","upload_date":"2006-12-03","comment":"RP-060823 - draft R2-063643 c...","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-200.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-7","version":"0.0.2","meeting":"RAN#33","upload_date":"2006-10-02","comment":"RP-060604 ex R2-062673 - Is s...","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/25_series/25.905/25905-002.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-7","version":"0.0.1","meeting":"-","upload_date":null,"comment":"R2-062441","official_file_url":null,"source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":"pre-approval"},{"release":"Rel-7","version":"0.0.0","meeting":"-","upload_date":null,"comment":"R2-06132","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-7","first_version_date":"2006-10-02","latest_version_date":"2008-01-07","first_version":"0.0.0","latest_version":"7.2.0","version_count":8}],"classifications":[],"work_items":[{"uid":1222,"acronym":"LCRTDD","effective_acronym":"LCRTDD","title":"Low Chip Rate TDD option","responsible_groups":["R1"],"release":"Rel-4","status":"Awaiting approval","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=1337","association_sources":[],"association_status":"historical_unverified"},{"uid":2544,"acronym":"MBMS","effective_acronym":"MBMS","title":"Multimedia Broadcast and Multicast Service","responsible_groups":["R2","R4","S1","S2","S3","S4","S5","R5"],"release":"Rel-6","status":"Awaiting approval","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=1337","association_sources":[],"association_status":"historical_unverified"},{"uid":350022,"acronym":"MBMSE-RANPhysLCRTDD","effective_acronym":"MBMSE-RANPhysLCRTDD","title":"MBMS Low Chip Rate TDD Physical Layer Enhancement","responsible_groups":["R1"],"release":"Rel-7","status":"Awaiting approval","wi_level":"Building Block (2nd level)","type":"Work Item","first_release":"Rel-7","last_release":"Rel-7","provenance_type":"official","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20261012.zip","association_sources":["crdb"],"association_status":"source_tracked"},{"uid":20051,"acronym":"RANFS-MBMSImp","effective_acronym":"RANFS-MBMSImp","title":"Study on Improvement of the Multimedia Broadcast Multicast Service (MBMS) in UTRAN","responsible_groups":["R2"],"release":"Rel-7","status":"Awaiting approval","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=1337","association_sources":[],"association_status":"historical_unverified"}],"change_requests":[{"portal_cr_id":null,"cr_number":"0001","revision":null,"category":"B","impacted_version":"7.0.0","target_release":"Rel-7","title":"1.28Mcps TDD MBMS physical layer improvements related changes","wg_tdoc":"R2-072031","wg_status":"agreed","tsg_tdoc":"RP-070409","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"0002","revision":null,"category":"B","impacted_version":"7.0.0","target_release":"Rel-7","title":"Introduce MBMS LTDD Physical Layer Enhancement","wg_tdoc":"R2-072201","wg_status":"agreed","tsg_tdoc":"RP-070409","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"0003","revision":null,"category":"C","impacted_version":"7.1.0","target_release":"Rel-7","title":"More improvement on Dedicated Carrier for 1.28Mcps TDD MBMS","wg_tdoc":"R2-075280","wg_status":"agreed","tsg_tdoc":"RP-070902","tsg_status":"approved","new_version":"7.2.0","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/25.905/relationship-evidence"}}