The new generation of Low Earth Orbit (LEO) based ultrafast broadband satellite constellations, such as from Elon Musk’s Starlink (SpaceX) and British-registered OneWeb, has prompted Ofcom to launch a new consultation on several licensing changes to help support them and tackle potential interference.
Until very recently, most broadband internet connectivity services delivered to UK consumers via satellite came from huge double-decker-bus sized spacecraft (platforms) that were positioned high above the Earth in geostationary orbits (GEO / GSO), which often reflects a distance of about 35,000km+ from the planet’s surface.
Such satellites were often constrained by limited peak capacity, take years to build and cost hundreds of millions of pounds each. The huge distances involved meant that internet latency times were often incredibly slow (around 600-1000 milliseconds – useless for fast-paced online video games etc.), while data allowances often came with strings attached and service speeds could be poor (especially at peak times).
By comparison, the new generation of Non-Geostationary Satellite Orbit (NGSO) satellites, such as the LEOs mentioned earlier, aim to eclipse the old solutions by creating vast constellations of significantly smaller LEO satellites (needed because they sit much closer – often at around 500-1300km). When matched by enough ground stations and the right technologies, these can deliver 100Mbps+ class speeds with fast latency (c.20-50ms).
However, huge mega constellations of LEO spacecraft are significantly more complex to manage, not least in terms of disputes over issues such as interference between rival networks. The International Telecommunication Union (ITU) Radio Regulations require such networks to be able to operate without “causing harmful radio interference to each other“, but Ofcom notes that “these agreements are yet to be concluded … [and] this creates a risk that interference between NGSO networks could cause localised degradation to the quality and reliability of these services,” said the regulator.
So, to help support competition in the market and protect the quality of the service customers receive, Ofcom are today proposing changes to the licensing process for NGSO systems. In short, new checks on potential interference between networks, greater transparency of licence applications and a requirement for different networks to co-operate with each other on technical matters to avoid risk of disruption to their services.
The consultation will be open to feedback until Monday 20th September 2021. Ofcom also intends to publish their related Space Sector Spectrum Strategy this Autumn, which will cover a much broader view of the satellite sector and related spectrum etc.
