Abstract
We have studied the delay-related rate oscillation within Diffserv. The rate oscillation can come from large round trip latency. Enforcing low feedback overhead can also cause the rate oscillation. The Selective Attenuation Feedback via Estimation (SAFE) is proposed to reduce the oscillation while maintaining fast response to network dynamics. SAFE has no per-flow accounting. Furthermore, the hashing technique is adopted to keep the operating overhead of SAFE to its minimum. System analysis supports the effectiveness of SAFE. Simulation result also shows that SAFE significantly reduces rate oscillation, therefore achieves high link utilization and small queue size while maintaining very low control overhead.
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