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：我们利用全无线测试平台以及一个连接Wi-Fi调度、路由器排队和BBRv3调步动态的简单跨层模型，评估了现代AQM方案下TCP BBRv3在Wi-Fi 6家庭网络中的表现。通过比较BBR与CUBIC在上行、下行和双向流量中，在不同AQM（FIFO、FQ-CoDel和CAKE）下的互联网流量性能，我们发现：FIFO会破坏调步稳定性并增加延迟，常使CUBIC占据优势；FQ-CoDel能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对齐，实现了最佳的整体性能。我们还识别出一种Wi-Fi特有的效应：CAKE的快速队列排空在改善调步对齐的同时，可能在BBRv3的带宽探测期间触发短暂的突发重传。这些结果源于可变的Wi-Fi服务速率、AQM延迟控制和BBRv3的在途数据限制之间的相互作用，从而得出实用建议：在家庭Wi-Fi中应使用FQ-CoDel或CAKE，并避免使用未管理的FIFO，同时存在对BBRv3探测进行Wi-Fi感知调优的潜力。