Rate-Based Active Queue Management for Congestion Control Over Wired and Wireless Links

Current active queue management (AQM) and TCP are designed and tuned to work well for wired networks where packet loss is mainly due to network congestion. In wireless networks, however, communication links suffer from transmission bit errors and handoff failures. As a result, the performance of TCP flows is significantly degraded. To mitigate this problem, we propose a rate-based exponential AQM (REAQM) scheme. REAQM tries to stabilize the system and achieve low delay, low packet loss, and high link utilization regardless the dynamic of network conditions. Simulation results indicate that REAQM is capable of performing well for TCP flows over both wired and wireless links.