WRC 2023 Agenda Items for WP 4C

Efficient orbit/spectrum utilization for MSS and RDSS

The list below shows all the WRC 2023 Agenda Items for which this is one of the involved groups. Click on an Agenda Item or Resolution to get more information about which Visualyse product to use and how Transfinite consultants could assist in studying this problem.

Agenda Item Description
Agenda Item 1.2

This agenda item considers identification of frequency bands 3 300 - 3 400 MHz (Region 2 and amend footnote in Region 1), 3 600 - 3 800 MHz (Region 2), 6 425 - 7 025 MHz (Region 1), 7 025 - 7 125 MHz (globally) and 10.0 - 10.5 GHz (Region 2) for IMT including possible allocations to the mobile service on a primary basis.

The ITU-R is invited to study:

  1. technical, operational and regulatory issues pertaining to possible use of the terrestrial component of IMT in the bands listed taking into account evolving needs, technical and operational characteristics of terrestrial IMT systems, evolution of IMT, deployment scenarios, needs of developing countries and time-frame in which spectrum would be needed
  2. sharing and compatibility studies (including with services in adjacent bands where appropriate) in order to protect services with an existing primary allocation, without imposing additional regulatory or technical constraints, and also, as appropriate, on services in adjacent bands
Agenda Item 1.4

This agenda item considers use of high altitude platform stations as IMT base stations (HIBS) in the mobile service in some bands below 2.7 GHz. In particular, the bands:

  1. 694 - 960 MHz
  2. 1 710 - 1 885 MHz (1 710 - 1 815 MHz for uplink only in Region 3)
  3. 2 500 - 2 690 MHz (2 500 - 2 535 MHz for uplink only in Region 3 except 2 655 - 2 690 MHz in Region 3)

The ITU-R is invited to study:

  1. spectrum needs for HIBS
  2. sharing and compatibility studies (including with services in adjacent bands where appropriate) in order to protect services with an existing primary allocation without imposing any additional technical or regulatory constraints in their deployment
  3. modifications to existing footnote and resolutions in order to facilitate use of HIBS with the latest radio interface technologies of IMT
  4. the definition of HIBS and possible modification to the RR as appropriate
Agenda Item 1.6

This agenda item is to consider regulatory provisions to facilitate radiocommunications for sub-orbital vehicles

The ITU-R is invited to study:

  1. the spectrum needs for communications between station on sub-orbital vehicles and terrestrial / space stations providing functions such as voice, data, TT&C etc.
  2. appropriate modifications, if any, to the RR, excluding any new allocations or changes to existing allocations, to accommodate sub-orbital vehicles including the status of these stations, technical and regulatory conditions for sub-orbital vehicles to operate under aeronautical regulations and to facilitate radiocommunications would enable sub-orbital vehicles to integrate into airspace and be interoperable with international civil aviation, to define relevant technical characteristics and protection criteria relevant for studies and to conduct sharing and compatibility studies with incumbent services that are allocated on a primary basis in the same or adjacent frequency bands
  3. identify as a result of studies if there is a need for access to additional spectrum that should be addressed after WRC-23
Agenda Item 1.7

This agenda item is to consider a new aeronautical mobile-satellite (R) service (AMS(R)S) allocation for both the Earth-to-space and space-to-Earth directions in all or parts of the frequency band 117.975 - 137 MHz while preventing undue constraints on existing VHF systems operating in the AM(R)S, the ARNS and in adjacent frequency bands

The ITU-R is invited:

  1. to define the relevant technical characteristics and to study compatibility between potential new AMS(R)S systems in the band 117.975 - 137 MHz in the Earth-to-space and space-to-Earth directions and existing primary services in band or in adjacent frequency bands while ensuring protection of systems using primary services in those frequency bands.
  2. to provide technical and regulatory regulations as the result of the studies for possible new allocation to AMS(R)S within the frequency band 117.975 - 137 MHz taking into consideration the responsibility of ICAO
Agenda Item 1.11

This agenda item is to consider possible regulatory actions to support the modernization of the Global Maritime Distress and Safety System and the implementation of e-navigation. WRC-23 is invited to:

  1. consider possible regulatory actions based on ITU-R studies taking into consideration the activities of the International Maritime Organisation (IMO) to support GMDSS modernization.
  2. to consider possible regulatory actions including spectrum allocations based on ITU-R studies for the maritime mobile service, supporting e-navigation.
  3. consider regulatory provisions, if any, based on the results of ITU-R studies to support the introduction of additional satellite systems into the GMDSS

The ITU-R is invited to conduct studies taking into consideration the activities of IMO and other relevant international organisations in order to determine spectrum needs and regulatory actions to support GMDSS modernization and the implementation of e-navigation including the introduction of additional satellite systems into the GMDSS

Agenda Item 1.14

This agenda item is to review and consider possible adjustments of the existing or possible new primary frequency allocations to EESS (passive) in the frequency range 231.5 - 252 GHz to ensure alignment with more up-to-date remote-sensing observation requirements. The ITU-R is invited to:

  1. to review the existing primary allocations to the EESS (passive) in the frequency range 231.5 - 252 GHz in order to analyse if these allocations are aligned with observation requirements of passive microwave sensors
  2. to study the impact that any changes to the EESS (passive) allocations in the frequency range 231.5 - 252 GHz might have on other primary services in these frequency bands
  3. to study, as appropriate, possible adjustments to the EESS (passive) allocations in the frequency range 231.5 - 252 GHz, taking into account the results of studies

WRC-23 is invited to review the results of these studies with a view to adjusting existing allocations or adding possible new allocations, as appropriate, to the EESS (passive) in the frequency range 231.5 - 252 GHz without unduly constraining the other primary services currently allocated in this frequency range

Agenda Item 1.16

This agenda item is to study and develop technical, operational and regulatory measures, as appropriate, to facilitate the use of the frequency bands 17.7 - 18.6 GHz, 18.8 - 19.3 GHz, 19.7 - 20.2 GHz (space-to-Earth), 27.5 - 29.1 GHz and 29.5 - 30 GHz by non-GSO FSS earth stations in motion, while ensuring due protection of existing services in those frequency bands. The ITU-R is invited to:

  1. study the technical and operational characteristics and user requirements of the different types of earth stations in motion that plan to operate in the frequency bands 17.7 - 18.6 GHz, 18.8 - 19.3 GHz, 19.7 - 20.2 GHz (space-to-Earth), 27.5 - 29.1 GHz and 29.5 - 30 GHz (Earth-to-space) or parts thereof
  2. to study sharing and compatibility between earth stations in motions operating with non-GSO FSS systems and current and planned stations of primary services allocated in the frequency bands 17.7 - 18.6 GHz, 18.8 - 19.3 GHz, 19.7 - 20.2 GHz (space-to-Earth), 27.5 - 29.1 GHz and 29.5 - 30 GHz (Earth-to-space) or parts thereof, to ensure protection of and not impose additional constraints on GSO systems and other services including terrestrial services in those frequency bands and in adjacent bands, including passive services
  3. to develop the technical and regulatory provisions of the operation of aeronautical and maritime earth stations in motion with non-GSO FSS systems, taking into account the results of studies
  4. to ensure that the technical and operational measures and the possible regulatory changes established in accordance with this Resolution shall not affect the relevant provisions related to the protection of GSO networks from non-GSO FSS Systems

WRC-23 is invited to review the results of these studies and take necessary actions, as appropriate

Agenda Item 1.17

This agenda item is to determine and carry out, on the basis of the ITU-R Studies in accordance with Resolution COM6/14 (WRC-19), the appropriate regulatory actions for the provision of inter-satellite links in specific frequency bands, or portions thereof, by adding an inter-satellite service allocation where appropriate. The ITU-R is invited to:

  1. develop the technical and operational characteristics of different types of space stations that plan satellite-to-satellite transmissions in the frequency bands 11.7-12.7 GHz, 18.1-18.6 GHz, 18.8-20.2 GHz and 27.5 - 30 GHz
  2. study the technical and operational characteristics, including spectrum requirements, offaxis EIRP values and out-of-band emission limits, for transmissions between space stations in the frequency bands 11.7-12.7 GHz, 18.1-18.6 GHz, 18.8-20.2 GHz and 27.5 - 30 GHz
  3. study sharing and compatibility between satellite-to-satellite links, intended to operate between space stations in the frequency bands 11.7-12.7 GHz, 18.1-18.6 GHz, 18.8-20.2 GHz and 27.5 - 30 GHz, and current and planned stations of the FSS and other existing services allocated in the same frequency bands and adjacent bands including passive services, with a view to ensure protection of primary services
  4. to develop, for different types of space stations, the technical and regulatory provisions for satellite-to-satellite operations in the frequency bands 11.7-12.7 GHz, 18.1-18.6 GHz, 18.8-20.2 GHz and 27.5 - 30 GHz or portions thereof, including new ISS allocations, as appropriate, taking into account the results of studies above

WRC-23 is invited to review the results of these studies and take necessary actions, as appropriate

Agenda Item 9.1.2

This agenda item is to review the amateur service and the amateur-satellite service allocations in the frequency band 1 240 - 1 300 MHz to determine if additional measures are required to ensure protection of the radionavigation-satellite (space-Earth) service operating in the same band.

The ITU-R is invited to:

  1. perform the detailed review of the different systems and applications used in the amateur service and amateur-satellite service allocations within the frequency band 1 240 - 1300 MHz
  2. taking into account the results of the above review, to study possible technical and operational measures to ensure the protection of RNSS (space-to-Earth) receivers from the amateur and amateur-satellite service within the frequency band 1 240 - 1 300 MHz, without considering the removal of these allocations

The Director of the BR is instructed to report on the results of the ITU-R studies to WRC-23

Agenda Item 9.1.3

This agenda item is to study the use of International Mobile Telecommunication (IMT) system for fixed wireless broadband in the frequency bands allocated to the fixed services on primary basis.

The ITU-R is invited to conduct any necessary studies on the use of IMT systems for fixed wireless broadband in the frequency bands allocated to the fixed service on primary basis, taking into account the relevant ITU-R studies, Handbooks, Recommendations and Reports

The Director of the BR is instructed to report on the results of the ITU-R studies to WRC-23