WRC 2027 Agenda Items for WP 4C

This agenda item is to consider the technical and operational issues and regulatory provisions for space-to-space links among GSO and non-GSO satellites in frequency bands 1 518 - 1 544 MHz, 1 545 - 1 559 MHz, 1 610 - 1 645.5 MHz, 1 646.5 - 1 660 MHz, 1 670 - 1 675 MHz and 2 483.5 - 2 500 MHz allocated to the MSS. The ITU-R is invited to:

1. study the technical and operational characteristics of different types of non-GSO space stations that operate or plan to operate space-to-space links with GSO networks in the frequency bands 1 626.5 - 1 645.5 MHz and 1 646.5 - 1 660 MHz (Earth-to-space) and 1 525 - 1 544 MHz and 1 545 - 1 559 MHz (space-to-Earth)
2. study the technical and operational characteristics of different types of non-GSO space stations that operate or plan to operate space-to-space links with non-GSO systems or GSO networks in the frequency bands 1 610 - 1 626.5 MHz and 1 670 - 1 675 MHz (Earth-to-space) and 1 518 - 1 525 MHz, 1 613.8 - 1 626.5 and 2 483.5 - 2 500 MHz (space-to-Earth)
3. study sharing and compatibility between space-to-space links in the cases described above with current and planned stations of the MSS, other existing primary services allocated in the same frequency bands, other existing primary services allocated in adjacent frequency bands and existing passive services allocated in adjacent frequency bands
4. develop technical conditions and regulatory provisions for the operation of space-to-space links in these bands including MSS (space-to-space) allocations of the additional of inter-satellite service (ISS)

Space-to-space links should only operate in the same direction as existing MSS allocations.

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.

This agenda item is to consider possible allocations to the MSS and possible regulatory actions in the frequency bands 1 427 - 1 432 MHz (space-to-Earth), 1 645.5 - 1 646.5 MHz (space-to-Earth)(Earth-to-space), 1 880 - 1 920 MHz (space-to-Earth)(Earth-to-space) and 2 010 - 2 025 MHz (space-to-Earth)(Earth-to-space) required for future development of low-date-rate non-GSO MSS.

WRC-23 is invited to:

1. study the spectrum requirements, technical and operational characteristics and conditions for non-GSO low-data-rate MSS systems including mitigation techniques that would allow coexistence of these systems in the same frequency band
2. study sharing and compatibility between the non-GSO low-data-rate MSS systems and the existing primary services operating in these and adjacent bands in order to ensure protection of existing services.

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.

This agenda item is to consider studies of a possible new allocation to the MSS for direct connectivity between space stations and IMT user equipment to complement terrestrial IMT network coverage. The ITU-R is invited to:

1. study possible allocations to the MSS in the frequency range between 694/698 MHz and 2.7 GHz taking into account IMT frequency arrangements addressed in the most recent version of Recommendation ITU-R M.1036.
2. study spectrum requirements and on technical, operational and regulatory matters related to the implementation of MSS for direct connectivity to the IMT user equipment to complement the terrestrial IMT network coverage
3. study sharing and compatibility between incumbent service, including in adjacent frequency bands, to ensure the their protection
4. study possible technical and operational measures to ensure that stations in the MSS do not cause harmful interference or claim protection from, stations operating in the mobile service

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.

This agenda item is to consider possible additional allocations to the MSS. It resolves to invite the ITU-R to:

1. study the relevant spectrum requirements and technical, operational and regulatory matters for the MSS in connection with possible new allocations to the MSS in the frequency bands 2 010 - 2 025 MHz (Earth-to-space) and 2 160 - 2 170 MHz (space-to-Earth) in Regions 1 and 3 and 2 120 - 2 160 MHz (space-to-Earth) in all regions.
2. study sharing and compatibility of possible new allocations to the MSS in these bands to ensure the protection of existing services allocated on a primary basis and also in adjacent frequency bands, without adversely affecting those services
3. study possible technical, operational and regulatory measures that ensure the protection of existing services and their continued operation and future development without imposing additional regulatory or technical constraints on those services, while ensuring their protection from harmful interference, when considering possible additional allocations to the MSS

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.