Bi-directional Transfers

ACC+acks-first close to “optimal” operating point (max forward throughput when reverse throughput is largest)

Avoids reverse buffer congestion

Reno (10, 0)

ACC+acks-first (2.67,27.1)

ACC+RED (1.74,24.2)

“Optimal” operating point (2.9,28.8)

Forward throughput (Mbps)

Reverse throughput (Kbps)

Forward transfer initiated before reverse

Grossly unfair

Avoids large ack delays

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