Study and assess the technical feasibility of the shared use of the 3.8-4.2 GHz frequency band by terrestrial wireless broadband systems providing local-area (i.e. low/medium power) network connectivity. In this regard, consider sharing solutions, including innovative features, which ensure:

1. protection and the future evolution and development of incumbent users sharing this band, in particular receiving satellite earth stations and terrestrial fixed links;
2. coexistence of terrestrial wireless broadband systems providing local-area network connectivity and uses operating in adjacent bands such as terrestrial systems providing wireless broadband electronic communications services in the 3.4-3.8 GHz frequency band and radio altimeters on board aircraft in the 4.2-4.4 GHz frequency band.

Protection and future evolution and development of incumbent users, such as earth stations and fixed links.

Coexistence with applications in adjacent bands, such as MFCN in 3.4-3.8 GHz and radio altimeters in 4.2-4.4 GHz.

PT1 will assist WG FM in defining the harmonised technical conditions, possibly a BEM.

Interim Report: 11/2022

• Preliminary results in September 2023.
• Stable studies at the latest in February 2024.