Radio Regulations

Source: the Radio Regulations published by the International Telecommunication Union (ITU).

WRC Agenda Item › WRC-27 › AI 1.6
AI

1.6

WRC-27 · Agenda item 1.6

to consider technical and regulatory measures for fixed-satellite service satellite networks/systems in the frequency bands 37.5-42.5 GHz (space-to-Earth), 42.5-43.5 GHz (Earth-to-space), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space) for equitable access to these frequency bands, in accordance with Resolution 131 (WRC-23)

Current WP 4A Res. 131 (WRC-23) › 37.5–42.5 GHz 42.5–43.5 GHz 47.2–50.2 GHz 50.4–51.4 GHz

Shared frequency bands

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Bands this agenda item addresses jointly with other WRC-27 items (CPM Report Table 1). Click a band to open its spectrum page.

42.5–43.5 GHz
Also studied under: AI 1.16
47.2–50.2 GHz 50.4–51.4 GHz
Also studied under: AI 1.1
At a glance Summary & background Regulatory Studies

At a glance Beta

Frequency band
37.5–42.5 GHz 42.5–43.5 GHz 47.2–50.2 GHz 50.4–51.4 GHz
Governing resolution
Res. 131 (WRC-23)
Responsible group WP 4A
Agenda-item type Technical

What's being studied — points to watch

Keeping access open

Whether measures can reserve practical room for later-filed systems — Res. 131 puts the specific needs of developing countries expressly in scope.

No change to incumbents

Any measure must not alter how existing satellite networks operate, nor weaken terrestrial-service protection (Res. 131 resolves).

What form the measures take

Res. 131 deliberately leaves the 'technical and regulatory measures' open — defining them is itself the study, against the difficulties first-come-first-served creates for later filings.

Access vs efficiency

Balancing openness for newcomers against the efficiency of already-coordinated large systems.

Preparation timeline

  1. Dec 2023 WRC-23 agenda adopted
  2. Dec 2023 CPM 27-1 studies allocated
  3. ITU-R studies 2026
  4. ITU-R studies 2027
  5. 5–15 Apr 2027 CPM 27-2 final report
  6. RTO Prep meetings 2027
  7. 11–15 Oct 2027 RA-27
  8. 18 Oct–12 Nov 2027 WRC-27

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Source: ITU Radio Regulations, editions of 2008, 2012, 2016, 2020 and 2024. The English, French and Spanish texts are each taken from the official edition in that language, not translated from one another. Sources and citation.