WRC 2023 Agenda Items for WP 5D

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

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

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