WRC 2023 Agenda Items for WP 5B

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 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

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

This agenda item is to consider appropriate regulations with a view to reviewing and if necessary revising Resolution 155 (Rec. WRC-19) to accommodate the use of fixed-satellite service (FSS) networks by control and non-payload communications of unmanned aircraft systems

The ITU-R is invited to study:

1. the technical, operational and regulatory aspects in relation to the implementation of Resolution 155 (Rev. WRC-19) taking into account the progress obtained by ICAO in the completion of SARPs on the use of FSS for the UAS CNPC links.
2. to review No. 5.484B and Resolution 155 (Rev. WRC-19) taking into account the results of the above studies.

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

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

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