Google proposed a new congestion-based congestion control, BBR. BBR is originally rate-based congestion control, but was revealed to operate at inflight cap when BBR flows share the bottleneck link. In this paper, from our simple analysis results, we propose a new BBR algorithm, BMR (BBR with Moderate Rate) which adequately reduces transmission rate. Our simulation results show operation point of BMR is close to Kleinrock’s ideal point, not a control point of BBR with inflight cap. We also show that BMR significantly improves RTT fairness and late arrival fairness issues of BBR.
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Ishikura et al. (2024) studied this question.
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