ABC - A Simple Explicit Congestion Controller for Wireless Networks

Explore a 22-minute conference talk from USENIX NSDI '20 introducing Accel-Brake Control (ABC), a novel explicit congestion control protocol designed for wireless networks with time-varying links. Learn how ABC marks packets with "accelerate" or "brake" signals to guide senders in adjusting their congestion windows, achieving better performance than XCP without requiring changes to header formats or user devices. Discover ABC's incremental deployability, its ability to coexist with non-ABC traffic, and its impressive results in Wi-Fi and cellular network implementations, including 30-40% higher throughput than Cubic+Codel and 2.2× lower delays than BBR on Wi-Fi paths.