WRC 2023 Agenda Items for WP 3M

Point-to-point and Earth-space propagation

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 1.1

This agenda item relates to consideration of conditions for which the band 4 800 - 4 825 and 4835 - 4 950 MHz could be used by terrestrial component of IMT, in accordance with Resolution 223 (WRC-19). In particular, it addresses technical and regulatory conditions, such as power flux density (pfd) limits, which could protect aeronautical and maritime mobile services.

Subject to review by WRC-23 these conditions are:

  1. in the frequency band 4 800 - 4 825 MHz and 4 835 - 4 950 MHz the coordination distance in relation to aircraft stations is 300 km (land paths) or 450 km (sea paths)
  2. in the frequency band 4 800 - 4 990 MHz the coordination distance in relation to fixed-service stations or other ground-based stations of the mobile service is 70 km
  3. a PFD threshold in No. 5.441B which does not apply to the countries listed in Resolves 5 of the Resolution
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 1.3

This agenda item considers possible primary allocation in Region 1 to the mobile service (except aeronautical) in the band 3 600 - 3 800 MHz.

The ITU-R is invited to study sharing and compatibility studies (including with services in adjacent bands where appropriate) in order to protect services with an existing primary allocation

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 1.5

This agenda item is to review the spectrum use and needs of existing services in the frequency band 470 - 960 MHz in Region 1 and consider possible regulatory actions in the frequency band 470 - 694 MHz in Region 1 on the basis of the review in accordance with Resolution 235

The ITU-R is invited to:

  1. review the spectrum use and study the spectrum needs of existing services within the frequency band 470 - 960 MHz in Region 1, in particular the spectrum needs for broadcasting and mobile (excluding aeronautical)
  2. carry out sharing and compatibility studies, as appropriate, in the frequency band 470 - 694 MHz between broadcasting and mobile (excluding aeronautical)
  3. sharing and compatibility studies in order to provide relevant protection of systems of other existing services
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 1.9

This agenda item is to review Appendix 27 of the Radio Regulations and consider appropriate regulatory actions and updates based on ITU-R studies in order to accommodate digital technologies for commercial aviation safety-of-life applications in existing HF bands allocated to the aeronautical mobile (route) service and ensure coexistence of current HF systems alongside modernized HF systems

The ITU-R is invited to study:

  1. any necessary modifications to Appendix 27 for the aeronautical mobile (route) service between 2 850 and 22 000 kHz
  2. to identify any necessary transition arrangements
  3. to recommend how new digital aeronautical wideband HF systems can be introduced while ensuring compliance with safety requirements
  4. to define the relevant technical characteristics and to conduct any necessary sharing and compatibility studies with incumbent services that are allocated on a primary basis in the same or adjacent frequency bands to avoid harmful interference
Agenda Item 1.10

This agenda item is to conduct studies on spectrum needs, coexistence with radiocommunication services and regulatory measures for possible new allocations for the aeronautical mobile service for the user of non-safety aeronautical mobile applications.

The ITU-R is invited to study:

  1. spectrum needs for new non-safety aeronautical mobile applications for air-to-air, ground-to-air and air-to-ground communications of aircraft systems.
  2. sharing and compatibility studies in the frequency band 22 - 22.21 GHz, already allocated on a primary basis to the mobile except aeronautical mobile service, in order to evaluate the possible revision or deletion of the "except aeronautical mobile" restriction while ensuring the protection of primary services in the considered frequency bands and, as appropriate, in adjacent frequency bands.
  3. sharing and compatibility studies on possible new primary allocations to the aeronautical mobile service for non-safety aeronautical applications in the frequency band 15.4 - 15.7 GHz while ensuring the protection of primary services in the considered frequency bands and, as appropriate, adjacent bands
  4. definition of appropriate protection for passive services and radio astronomy allocated in adjacent bands from unwanted emission of AMS
Agenda Item 1.12

This agenda item is to study a possible new secondary allocation to the EESS (active) service for spaceborne radar sounders within the range of frequencies around 45 MHz, taking into account the protection of incumbent services, including in adjacent bands.

WRC-23 is invited to consider the results of studies on spectrum needs for a possible new secondary allocation to the EESS(Active) service for spaceborne radar sounders within the range of frequencies around 45 MHz taking into account the protection of incumbent services

The ITU-R is invited to conduct studies on spectrum needs and sharing studies between the EESS(Active) service and the radiolocation, fixed, mobile, broadcasting, amateur and space research services in the 40 - 50 MHz frequency range and in adjacent bands

Agenda Item 1.13

This agenda item is to consider a possible upgrade of the allocation of the frequency band 14.8 - 15.35 GHz to the space research service. The ITU-R is invited to:

  1. to investigate and identify all relevant scenarios that need to be considered in compatibility and sharing studies, taking into account the latest relevant ITU-R Recommendations
  2. to conduct and complete in time for WRC-23 sharing and compatibility studies in order to determine the feasibility of upgrading the SRS allocation to primary status in the frequency band 14.8 - 15.35 GHz with a view to ensuring protection of the primary service
  3. to determine the technical and regulatory conditions according to the results of studies

WRC-23 is invited to examine, on the basis of the results of studies by the ITU-R, the possibility of upgrading the secondary status of the allocation of the SRS to primary status in the frequency band 14.8 - 15.35 GHz taking into account studies

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 1.15

This agenda item is to harmonize the use of the frequency band 12.75 - 13.25 GHz (Earth-to-space) by earth stations on aircraft and vessels communicating with geostationary space stations in the fixed satellite service globally. The ITU-R is invited to:

  1. study the technical and operational characteristics and user requirements of earth station on aircraft and vessels that communicate or plan to communicate with GSO space stations in the FSS in the frequency band 12.75 - 13.25 GHz (Earth-to-space) under the envelope of Appendix 30B Article 65 recorded in the List of MIFR with favourable finding
  2. study the sharing and compatibility issues between earth stations on aircraft and vessels communicating with GSO space stations in the FSS and current and planned stations of existing services as wells as services in bands adjacent to those to ensure protection of and not impose undue constraints on, those services and their future development, taking into account the provisions of Appendix 30B
  3. to study the responsibility of the entities involved in the operation of the earth stations on aircraft and resolutions
  4. develop the criteria to ensure that earth stations on aircraft and vessels as a new application of the FSS in this frequency band shall not claim more protection or cause more interference than filed earth stations of Appendix 30B
  5. to develop the technical conditions and regulatory provisions for the harmonized operation of earth stations on aircraft and vessels communicating with GSO space stations in the FSS operating in the frequency band 12.75 - 13.25 GHz (Earth-to-space), considering the result of studies, and in particular without affecting the Appendix 30B Plan
  6. to ensure that the operation of earth stations on aircraft and vessels in the frequency band 12.75 - 13.25 GHz under Appendix 30B shall not adversely affect the interference criteria including the cumulative effect of multiple earth stations on aircraft and vessels
  7. to ensure that the use of the frequency band 12.75 - 13.25 GHz (Earth-to-space) by earth stations on aircraft and vessels shall not limit the access of other administrations to their national resources in Appendix 30B
  8. ensure that use of earth stations on aircraft and vessels would not result in any additional status than the GSO network with which these stations communicate

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

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 1.18

This agenda item is to consider studies relating to spectrum needs and potential new allocations to the mobile-satellite service for future development of narrowband mobile-satellite systems. The ITU-R is invited to:

  1. conduct studies on spectrum and operational requirements as well as system characteristics of low-data rate systems for the collection of data from and management of terrestrial devices in the MSS as described in the Resolution considering a) and limited to the basic characteristics in recognising c)
  2. to conduct sharing and compatibility studies with existing primary services to determine the suitability of new allocations to the MSS with a view to protecting the primary services in the following frequency bands and adjacent frequency bands: 1 695 - 1 710 MHz in Region 2, 2 010 - 2 025 MHz in Region 1, 3 300 - 3 315 MHz, 3 385 - 3 400 MHz in Region 2
  3. to consider possible new primary or secondary allocations, with the necessary technical limitations, taking into account the characteristics described in recognising c) to the MSS for non-GSO satellites operating low-data rate systems for the collection of data from, and management of, terrestrial devices based on the result of sharing and compatibility studies while ensuring protection of existing primary services in those frequency bands, and adjacent frequency bands, without causing undue constraints on their further developments

WRC-23 is invited to determine, on the basis of the studies conducted under the resolves to invite the ITU-R above, appropriate regulatory action

Agenda Item 1.19

This agenda item is to consider a new primary allocation to the fixed-satellite service in the space-to-Earth direction in the frequency band 17.3 - 17.7 GHz in Region 2, while protecting existing primary services in the band. Its resolves to protect radiocommunication services to which the band is allocated on a primary basis, in particular assignments contained in Appendix 30A.

The ITU-R is invited to conduct and complete in time for WRC-23, sharing and compatibilities studies between the FSSS (space-to-Earth) and the broadcasting-satellite service (space-to-Earth) and between the FSS (space-to-Earth) and the FSS (Earth-to-space) in order to consider possible new primary allocation to the FSS (space-to-Earth) in the frequency band 17.3-17.7 GHz for Region 2, while ensuring the protection of existing primary allocations in the same and adjacent bands, as appropriate, and without imposing any additional constraints on existing allocations to the BSS (space-to Earth) and the FSS (Earth-to-space):

WRC-23 is invited to consider the results of the above studies and take necessary actions, as appropriate.

Agenda Item 9.1.1

This agenda item is to review the results of studies relating to the technical and operational characteristics, spectrum requirements and appropriate radio service designations for space weather sensors with a view to describing appropriate recognition and protection in the Radio Regulations without placing additional constraints on existing services.

The ITU-R is invited to:

  1. to identify, in time for WRC-23, and based upon existing and possible further ITU-R studies on the technical and operational characteristics, specific space weather sensors which need to be protected by appropriate regulation. This includes determining if receive-only space weather sensors shall be designated as applications of the Metaids services, to determine the appropriate radiocommunication service, if any, for cases where it is determined that receive-only space weather sensors do not fall under the Metaids service
  2. to conduct, in time for WRC-23, any necessary sharing studies with incumbent systems operating in frequency bands used by space weather sensors with the objective of determine potential regulatory provisions that can be provided to receive-only operational space weather sensors for their appropriate recognition in the Radio Regulations, while not placing additional constraints on incumbent services
  3. to develop potential solutions to describe in the Radio Regulations in Articles 1 and 4 and/or as a WRC resolution, if deemed appropriate, for consideration by WRC-23, space weather sensor systems and their corresponding usage, as well as protection requirements for receive-only space weather sensors
  4. to conduct studies, in time for WRC-23, on the technical and operational characteristics of active space weather sensors and conduct necessary sharing studies with incumbent systems operating in frequency bands used by active space weather sensors, with the objective of determining the appropriate radiocommunication service for those sensors

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

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