Does anyone have a link to the paper? I’ve been working with various congestion control / QoS algorithms over the past two years as a hobby, and there are plent

Does anyone have a link to the paper? I’ve been working with various congestion control / QoS algorithms over the past two years as a hobby, and there are plenty of new developments going on in recent years. I’m curious which algorithms they studied, and what the actual roadblock is, because I’m sceptical they weren’t just looking for a great punch line for an article (e.g. perhaps the problem is more theoretical than practical).