Cloudflare has proposed a new congestion-control technology designed for Starlink, the satellite internet service. The proposal, which the company has not publicly detailed, would aim to improve data throughput and reduce latency for users on the low-Earth-orbit network.
Why satellite links break traditional congestion control
Standard internet congestion control algorithms, like those built into TCP, were designed for networks with relatively stable round-trip times and low packet loss. They work by gradually increasing the amount of data sent until packet loss is detected, then backing off. That approach works well on fiber and cable connections, but it falls apart on satellite links.
Satellite internet has round-trip times that can exceed 500 milliseconds, and packet loss can spike due to weather, signal interference, or the movement of the satellite itself. When a traditional algorithm sees that loss, it assumes the network is congested and cuts its sending rate. On a satellite link, that loss might have nothing to do with congestion, so the connection ends up running far slower than it could.
That's the problem Cloudflare is trying to solve. The company has proposed a congestion-control mechanism that would account for the unique characteristics of satellite links, though it hasn't released the technical details.
What Cloudflare is proposing
Cloudflare has not said exactly how the new technology works. The proposal is still in the early stages, and the company hasn't indicated whether it's been tested or deployed on any real Starlink connections.
What is clear is that the goal is to make better use of the available bandwidth on satellite links. Instead of treating every packet loss as a sign of congestion, the proposed system would likely try to distinguish between loss caused by congestion and loss caused by the satellite environment. That could allow Starlink users to get closer to the actual capacity of their connection.
Cloudflare is a major player in internet infrastructure, running a global network that handles a significant share of web traffic. Its interest in satellite congestion control suggests that the company sees satellite internet as a growing part of the online ecosystem.
What happens next
There's no word on whether Starlink will adopt the technology. The proposal is just that — a proposal. Cloudflare hasn't announced a timeline for testing or deployment, and it's unclear if Starlink's operator is even considering it.
For now, the proposal sits as a potential solution to a problem that's been around since the first satellite internet services appeared. Whether it moves from proposal to reality depends on factors Cloudflare doesn't control.
Cloudflare has not said when it expects the technology to be tested or deployed.
