How can I do congestion control for a UDP protocol?

Question

I have a custom UDP protocol with multiple senders/receivers designed to send large files around as fast as possible. It is client/server based.

How can I detect conge

Answer 1

I had the following idea:

• Sender sends the data.
• Receiver waits a couple of seconds and then calculates the throughput rate / s
• Receiver sends the rate at which its receiving packets (bytes / s) to sender
• Sender calculates its rate of sending packets
• If the rate of sender is significantly higher, reduce it to match receiving rate.

Alternatively, a more advanced approach:

• Sender starts sending at a predefined min rate (eg. 1kb / s)
• Receiver sends the calculated receiving rate back to sender.
• If the receiving rate is the same as sending rate (taking latency into account) increase the rate by a set pct (eg. rate * 2)
• Keep doing this until the sending rate becomes higher than receiving rate.
• Keep monitoring the rates to account for changes in bandwidth increase / reduce rate if needed.

Disclaimer: im not network expert, this might not work for you.