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| /* Bottleneck Bandwidth and RTT (BBR) congestion control | |
| * | |
| * BBR congestion control computes the sending rate based on the delivery | |
| * rate (throughput) estimated from ACKs. In a nutshell: | |
| * | |
| * On each ACK, update our model of the network path: | |
| * bottleneck_bandwidth = windowed_max(delivered / elapsed, 10 round trips) | |
| * min_rtt = windowed_min(rtt, 10 seconds) | |
| * pacing_rate = pacing_gain * bottleneck_bandwidth | |
| * cwnd = max(cwnd_gain * bottleneck_bandwidth * min_rtt, 4) |