A family of satellite communications services that provide two‑way voice, messaging and data to handheld or other small personal devices with near‑global
coverage, typically via non‑geostationary (LEO/MEO) constellations. Often called GMPCS, the term is an industry and International Telecommunication Union (ITU) expression rather than a defined term in UK or Irish primary legislation. In UK and Irish regulatory practice it broadly corresponds to the mobile‑satellite service (MSS).
Key legal features include: cross‑border operation; use of internationally coordinated spectrum under the ITU Radio Regulations; reliance on feeder links and gateways; and user terminals designed for portable, personal use. In the UK, operators and gateways require authorisation and Wireless Telegraphy Act 2006 licences from Ofcom (for example, earth station/network licences), with many compliant user terminals operating licence‑exempt under published interface requirements. In Ireland, equivalent authorisations and licences are administered by ComReg under the Wireless Telegraphy Acts and the European Electronic Communications Code framework.
Typical issues for practitioners include spectrum access and coordination, market access and “landing rights”, equipment conformity (UKCA/CE marking, Radio Equipment rules), lawful interception and security obligations, and consumer protection. Usage and regulatory treatment are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland.