| Numéro | Date | Source | Titre | 
|  | Numéro | Mise à disposition | Taille |  | 
|  | 
| [ 186 ] | 2025-10-28 | Chair, WP 4B | Report on the fifty-seventh meeting of Working Party 4B (Geneva, 22-28 October 2025) | 
|   | [ 186 ] Annex 08 Part 02 - English - Word | 2025-10-30 [18:14] | 6'872'752  octets |  | 
|   | [ 186 ] Annex 08 Part 01 - English - Word | 2025-10-30 [18:14] | 11'517'752  octets |  | 
|   | [ 186 ] Annex 08 Part 05 - English - Word | 2025-10-30 [18:14] | 58'554  octets |  | 
|   | [ 186 ] Annex 08 Part 04 - English - Word | 2025-10-30 [18:13] | 58'388  octets |  | 
|   | [ 186 ] Annex 08 Part 03 - English - Word | 2025-10-30 [18:11] | 770'376  octets |  | 
|  | 
| [ 184 ] | 2025-10-28 | BR, Study Groups Department | List of documents issued (Documents 4B/136 - 4B/184) | 
|   | [ 184 ]  - English - Word | 2025-10-28 [10:57] | 44'658  octets |  | 
|  | 
| [ ADM 14 ] | 2025-10-28 | Chair, WP 4B | Agenda for the closing Plenary meeting of Working Party 4B - Tuesday, 28 October 2025, from 1015 to 1200 hours (Geneva time) (Physical meeting with remote participation) (Room K, Montbrilliant Building) | 
|   | [ ADM 14 ]  - English - Word | 2025-10-28 [09:48] | 39'417  octets |  | 
|  | 
| [ TD 50 ] | 2025-10-28 | WP 4B | Preliminary draft revision of 
Recommendation ITU-R BO.1130-4 - Systems for digital satellite broadcasting to vehicular, portable and fixed
receivers in the bands allocated to BSS (sound) in the
frequency range 1 400-2 700 MHz | 
|   | [ TD 50 ]  - English - Word | 2025-10-28 [08:26] | 111'150  octets |  | 
|  | 
| [ TD 49 ] | 2025-10-28 | WP 4B | Preliminary draft revision of Recommendation
ITU-R BO.789-2 - Service for digital sound broadcasting to vehicular portable
 and fixed receivers for broadcasting-satellite service
(sound) in the frequency range 1 400-2 700 MHz | 
|   | [ TD 49 ]  - English - Word | 2025-10-28 [08:19] | 39'344  octets |  | 
|  | 
| [ TD 48 ] | 2025-10-28 | SWG 4B3 | Working document towards a preliminary draft
new Report ITU-R M.[MSS_OBP] | 
|   | [ TD 48 ]  - English - Word | 2025-10-28 [08:16] | 58'978  octets |  | 
|  | 
| [ TD 47 ] | 2025-10-28 | SWG 4B3 | Contribution to working document towards a preliminary 
draft new Report on development and technology of emergency communications in mobile-satellite service | 
|   | [ TD 47 ]  - English - Word | 2025-10-28 [08:15] | 46'472  octets |  | 
|  | 
| [ TD 46 ] | 2025-10-28 | SWG 4B3 | Working document towards a preliminary draft new 
Report ITU-R M.[SAT IOT] - Technical and operational aspects of satellite 
Internet of Things (IoT) applications | 
|   | [ TD 46 ]  - English - Word | 2025-10-28 [08:08] | 640'534  octets |  | 
|  | 
| [ TD 45 ] | 2025-10-28 | SWG 4B4 | Draft liaison statement to Working Party 4A on material for the Handbook on Satellite Communications and Technologies | 
|   | [ TD 45 ]  - English - Word | 2025-10-28 [08:00] | 37'727  octets |  | 
|  | 
| [ TD 44 ] | 2025-10-28 | SWG 4B4 | Handbook on satellite communications and technologies | 
|   | [ TD 44 ] Part 6 - English - Word | 2025-10-28 [08:19] | 8'937'993  octets | Chapter 9 | 
|   | [ TD 44 ] Part 5 - English - Word | 2025-10-28 [08:19] | 58'554  octets | Annex A | 
|   | [ TD 44 ] Part 4 - English - Word | 2025-10-28 [08:18] | 58'388  octets | Chapter 12 | 
|   | [ TD 44 ] Part 3 - English - Word | 2025-10-28 [08:17] | 770'376  octets | Chapter 11 | 
|   | [ TD 44 ] Part 2 - English - Word | 2025-10-28 [08:17] | 6'872'752  octets | Chapter 10 | 
|   | [ TD 44 ] Part 1 - English - Word | 2025-10-28 [08:16] | 11'517'752  octets | Chapter 8 | 
|   | [ TD 44 ]  - English - Word | 2025-10-28 [08:15] | 24'943'571  octets |  | 
|  | 
| [ TD 43 ] | 2025-10-27 | SWG 4B1 | Working document towards a preliminary draft new Report on development and technology trends for the satellite component of Imt towards 2030 and beyond | 
|   | [ TD 43 ]  - English - Word | 2025-10-27 [17:50] | 237'394  octets |  | 
|  | 
| [ TD 42 ] | 2025-10-27 | SWG 4B2 | Discussion on satellite link availability 
and performance objectives | 
|   | [ TD 42 ]  - English - Word | 2025-10-27 [16:23] | 36'979  octets |  | 
|  | 
| [ 183 ] | 2025-10-27 | Vocabulary Rapporteur SG4 | Note to Vocabulary Rapporteur for Study Group 4 - Feedback on the term "multiple-input and multiple-output (MIMO)" and its definition developed by ITU-R Working Party 5C and submitted to the CCT for validation - [Draft] reply liaison statement to Coordination Committee for Terminology (copy to ITU-T Study Groups 5, 13 and 15 and Working Parties 4B, 5A, 5D, and 6A for information) | 
|   | [ 183 ]  - English - Word | 2025-10-27 [13:54] | 35'362  octets |  | 
|  | 
| [ TD 41 ] | 2025-10-27 | WP 4B | [Draft] reply liaison statement to ITU-T Working Party 1/13 on consent for various components of draft new Recommendation from ITU-T | 
|   | [ TD 41 ]  - English - Word | 2025-10-27 [13:58] | 36'404  octets |  | 
|  | 
| [ TD 40 ] | 2025-10-27 | SWG 4B1 | Working document towards a preliminary draft new Report ITU-R M.[IMT-2030-SATELLITEREQ-EVAL-SUB] - Technical performance requirements, evaluation methodology, and submission templates for the satellite radio interface(s) of IMT-2030 | 
|   | [ TD 40 ]  - English - Word | 2025-10-27 [13:47] | 39'167  octets |  | 
|  | 
| [ TD 39 ] | 2025-10-27 | SWG 4B1 | Working document towards a preliminary draft new ITU-R Report on a framework for satellite radio interface(s) 
of IMT-2030 | 
|   | [ TD 39 ]  - English - Word | 2025-10-27 [13:58] | 67'992  octets |  | 
|  | 
| [ ADM 13 ] | 2025-10-22 | WP 4B | Fifty-seventh meeting of Working Party 4B - Meeting schedule (22 - 28 October 2025) | 
|   | [ ADM 13 ] Revision 1 - English - Word | 2025-10-23 [11:14] | 36'079  octets |  | 
|  | 
| [ ADM 12 ] | 2025-10-22 | Chair, WP 4B | Work plan for the fifty-seventh meeting of Working Party 4B (22 - 28 October 2025) | 
|   | [ ADM 12 ] Revision 1 - English - Word | 2025-10-22 [12:52] | 37'241  octets |  | 
|  | 
| [ ADM 11 ] | 2025-10-22 | Chair, WP 4B | Agenda for the opening Plenary meeting of Working Party 4B - Wednesday, 22 October 2025, from 0930 to 1045 hours (Geneva time) (Physical meeting with remote participation) (Room K, Montbrillant) | 
|   | [ ADM 11 ]  - English - Word | 2025-10-22 [08:24] | 39'654  octets |  | 
|  | 
| [ 182 ] | 2025-10-17 | WP 5D | Liaison statement to Working Party 4B - Status and revision schedule of Recommendation ITU-R M.2150 | 
|   | [ 182 ]  - English - Word | 2025-10-17 [16:31] | 36'305  octets |  | 
|  | 
| [ INF 6 ] | 2025-10-15 | Chair, SG 4 | Recommendations of the SG 4 Steering Committee | 
|   | [ INF 6 ]  - English - Word | 2025-10-15 [09:00] | 37'290  octets |  | 
|  | 
| [ INF 5 ] | 2025-10-14 | BR, Study Groups Department | Guidelines on the management of fully virtual meetings and physical meetings with remote participation | 
|   | [ INF 5 ]  - English - Word | 2025-10-14 [09:44] | 44'080  octets |  | 
|  | 
| [ 167 ] | 2025-10-01 | IAFI | Working document towards a preliminary draft new Report ITU-R M.[SAT-TERRESTRIAL & SAT-IOT] - Solution for remote sparsely populated areas with broadband and large coverage | 
|   | [ 167 ]  - English - Word | 2025-10-02 [09:17] | 48'394  octets |  | 
|  | 
| [ 181 ] | 2025-10-10 | Japan | Elements and revision of draft working document for the Handbook on Satellite Communications and Technologies | 
|   | [ 181 ]  - English - Word | 2025-10-27 [11:53] | 2'559'238  octets |  | 
|  | 
| [ 180 ] | 2025-10-10 | Thales SA | Working document towards a preliminary draft new Report on development and technology trends for the satellite component of IMT towards 2030 and beyond | 
|   | [ 180 ]  - English - Word | 2025-10-10 [15:20] | 201'614  octets |  | 
|  | 
| [ 179 ] | 2025-10-10 | Thales SA | [Working document towards a preliminary draft new ITU-R Report on a framework for satellite radio interface(s) of IMT-2030] | 
|   | [ 179 ]  - English - Word | 2025-10-10 [14:54] | 118'386  octets |  | 
|  | 
| [ 178 ] | 2025-10-10 | United States | Availability for satellite systems | 
|   | [ 178 ]  - English - Word | 2025-10-10 [14:51] | 57'417  octets |  | 
|  | 
| [ 177 ] | 2025-10-10 | United States | Working document towards a preliminary draft new Report ITU-R M.[MSS_OBP] - Example/Survey of network architectures and their impacts on performance objectives for mobile-satellite service systems with on-board processing | 
|   | [ 177 ]  - English - Word | 2025-10-10 [15:10] | 54'038  octets |  | 
|  | 
| [ 176 ] | 2025-10-10 | United States | Working document towards a preliminary draft new Report ITU-R M.[SAT IOT] - Technical and operational aspects of satellite Internet of Things (IoT) applications | 
|   | [ 176 ]  - English - Word | 2025-10-10 [14:35] | 987'721  octets |  | 
|  | 
| [ 175 ] | 2025-10-10 | United States | [Working document towards a preliminary draft new ITU-R Report on a framework for satellite radio interface(s) of IMT-2030] - The proposed contribution will update the working document towards a preliminary draft new ITU-R Report on a framework for satellite radio interface(s) of IMT-2030. | 
|   | [ 175 ]  - English - Word | 2025-10-10 [14:36] | 112'984  octets |  | 
|  | 
| [ 174 ] | 2025-10-10 | United States | Working document towards a preliminary draft new Report on development and technology trends for the satellite component of IMT towards 2030 and beyond | 
|   | [ 174 ]  - English - Word | 2025-10-10 [14:04] | 210'626  octets |  | 
|  | 
| [ 173 ] | 2025-10-09 | EUTELSAT
	          , Globalstar, Inc.
	          , Viasat, Inc. | Availability and link margin | 
|   | [ 173 ]  - English - Word | 2025-10-10 [11:32] | 54'362  octets |  | 
|  | 
| [ 172 ] | 2025-10-10 | SES | Adaptive coding and modulation (ACM) performance objectives | 
|   | [ 172 ]  - English - Word | 2025-10-10 [11:18] | 307'635  octets |  | 
|  | 
| [ 171 ] | 2025-10-09 | Telefon AB - LM Ericsson | Requirements and evaluation methodology for the IMT-2030 satellite component | 
|   | [ 171 ]  - English - Word | 2025-10-10 [11:32] | 227'878  octets |  | 
|  | 
| [ 160 ] | 2025-09-25 | Alliance for Telecommunications Industry Solutions | 3GPP proposal on aligning the timing of future updates to Recommendations ITU-R M.2150 and ITU R M.[IMT-2020-SAT.SPECS] | 
|   | [ 160 ]  - English - Word | 2025-10-06 [11:11] | 35'915  octets |  | 
|  | 
| [ 161 ] | 2025-09-29 | China | Contribution to working document towards a preliminary draft new Report on development and technology of emergency communications in mobile-satellite service | 
|   | [ 161 ]  - English - Word | 2025-09-30 [15:52] | 46'504  octets |  | 
|  | 
| [ 170 ] | 2025-10-06 | European Broadcasting Union
	          , Broadcast Networks Europe | Proposal to upgrade to draft revision the preliminary draft revisions of Recommendations ITU-R BO.789-2 and ITU-R BO.1130-4 | 
|   | [ 170 ]  - English - Word | 2025-10-08 [09:16] | 35'461  octets |  | 
|  | 
| [ INF 4 ] | 2025-10-07 | BR, Study Groups Department | Information for participants - Meetings of Working Parties 4A, 4B and 4C, and Study Group 4 (Geneva, 15 October-7 November 2025) | 
|   | [ INF 4 ] Part 1 - English -  PowerPoint 2007 | 2025-10-14 [09:41] | 4'451'931  octets |  | 
|   | [ INF 4 ]  - English - Word | 2025-10-14 [09:41] | 5'178'834  octets |  | 
|  | 
| [ 169 ] | 2025-10-03 | CCT | Liaison statement to ITU-R Working Parties 4B, 4C, 5A, 5D and 6A (copy to ITU-T Study Groups 5, 13 and 15 for information) - Request for feedback on the term "multiple-input and multiple-output (MIMO)" and its definition developed by ITU-R Working Party 5C and submitted to the CCT for validation | 
|   | [ 169 ]  - English - Word | 2025-10-03 [16:00] | 40'720  octets |  | 
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