We evaluate TCP BBRv3 on Wi-Fi 6 home networks under modern AQM schemes using a fully wireless testbed and a simple cross-layer model linking Wi-Fi scheduling, router queueing, and BBRv3's pacing dynamics. Comparing BBR Internet traffic with CUBIC across different AQMs (FIFO, FQ-CoDel, and CAKE) for uplink, downlink, and bidirectional traffic, we find that FIFO destabilizes pacing and raises delay, often letting CUBIC dominate; FQ-CoDel restores fairness and controls latency; and CAKE delivers the best overall performance by keeping delay low and aligning BBRv3's sending and delivered rates. We also identify a Wi-Fi-specific effect where CAKE's rapid queue draining, while improving pacing alignment, can trigger brief retransmission bursts during BBRv3's bandwidth probes. These results follow from the interaction of variable Wi-Fi service rates, AQM delay control, and BBRv3's inflight limits, leading to practical guidance to use FQ-CoDel or CAKE and avoid unmanaged FIFO in home Wi-Fi, with potential for Wi-Fi-aware tuning of BBRv3's probing.

翻译：我们在全无线测试平台上评估了TCP BBRv3在采用现代AQM方案的Wi-Fi 6家庭网络中的表现，并建立了一个简单的跨层模型以关联Wi-Fi调度、路由器队列管理和BBRv3的速率调整动态。通过对比BBR互联网流量与CUBIC在上行、下行及双向传输场景下不同AQM（FIFO、FQ-CoDel和CAKE）中的表现，我们发现：FIFO会破坏速率调整稳定性并增加延迟，通常导致CUBIC占据优势；FQ-CoDel可恢复公平性并控制延迟；而CAKE通过保持低延迟并使BBRv3的发送速率与交付速率相匹配，实现了最佳整体性能。我们还识别出Wi-Fi特有的效应：CAKE的快速队列清空虽能改善速率调整对齐，但在BBRv3带宽探测期间可能引发短暂的重传突发。这些结果源于可变Wi-Fi服务速率、AQM延迟控制与BBRv3飞行中数据量限制之间的相互作用，为家庭Wi-Fi中优先选用FQ-CoDel或CAKE并避免使用无管理的FIFO提供了实践指导，同时揭示了针对Wi-Fi特性调优BBRv3探测过程的潜在方向。