WRC 2023 Agenda Items for WP 7D

Radio astronomy

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 1.4

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 1.10

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 1.13

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 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 9.1.3

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