WRC 2023 Agenda Item Details

Agenda Item: Agenda Item 1.2
Resolution(s): Resolution 245 (COM6/2) (WRC-19)
Description of work:

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
Comments: The topic of IMT in C band has been a long standing one with both the ITU and national regulations. This band is a key one for receive satellite Earth stations and at WRC-07 the call was for "no change" in its status in the face of concerted push by terrestrial mobile interests. However, since then the pressure and interest in use of these bands by IMT has increased and now many regulators are implementing band segmentation or sharing techniques to facilitate introduction of mobile services and allow auctions to proceed. Note that the date by which technical and operational characteristics needed for sharing and compatibility studies are to be available is 15th June 2021.
Lead Working Party(s): WP 5D
Involved Working Parties: WP 3K, WP 3M, WP 4A, WP 4B, WP 4C, WP 5A, WP 5B, WP 5C, WP 7B, WP 7C
How Visualyse products can help: Visualyse Professional can model sharing between IMT services and other services such as satellite ES and the fixed service. This analysis can be static, area, dynamic or Monte Carlo including adjacent band studies. A range of propagation models could be used including P.452, P.1546, P.1812, P.2001 or generic dual or triple slope including Hata / COST 231. This analysis can be generic or include the use of terrain data. Visualyse Professional can also model the beam-forming antenna gain pattern in Recommendation ITU-R M.2101.
How Transfinite consultants can help: We can undertake studies including analysis of sharing between the services covered by this agenda item, and identify suitable system characteristics and sharing criteria, and provide contributions and representation at ITU-R Working Parties. Using our in house Visualyse Professional we can quickly model a very wide range of systems, services and scenarios. We have undertaken studies of C-band sharing between IMT and other services including satellite and fixed links for a range of clients including Ofcom and the GSMA.
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