Network Traffic and Congestion Control

When more data flows through a network than its links can carry, packets queue up, get dropped, and connections slow to a crawl — a phenomenon called congestion that has shaped the design of the internet since its earliest days. Researchers study how protocols like TCP detect and respond to congestion, how routers can actively manage their queues to prevent buildup rather than simply react to it, and how bandwidth and delay behave across the layered, irregular topology of real networks. A persistent challenge is that the internet now carries an enormous variety of traffic — video streams, real-time calls, bulk transfers — each with different tolerances for delay and loss, making a single control strategy hard to optimize for all of them. Open questions include how to accurately estimate available bandwidth in wireless and heterogeneous environments, how to coordinate congestion control across multicast trees where a single flow fans out to many receivers, and how to preserve quality-of-service guarantees as networks grow more dynamic and decentralized.

Works

76,268

Total citations

869,638

Keywords

Congestion ControlTCPActive Queue ManagementNetwork PerformanceBandwidth EstimationInternet Topology