Law: Towards Consistent Low Latency in 802.11 Home Networks
summary
Law restructures the 802.11 link layer to enforce a latency bound by unified queuing, per-transmission-opportunity rate updates, active early drops, and a “clean-up” state with retransmission limits and loss-pattern control. Prototype implements Law on OpenWiFi SDR and evaluates with iperf UDP and WebRTC. Results show up to 83% per-packet 99th-percentile latency improvement with under 1% loss and a 58% reduction in 99% frame delivery latency for 30fps streams.
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chapters (10)
- 0:00Low latency in Wi-Fi
- 1:23Wi-Fi last hop bottleneck
- 2:47Wi-Fi link layer problems
- 5:16Rate adaptation spikes
- 7:22Loss-tolerant apps
- 8:27Low latency Wi-Fi design
- 11:20Queuing reshaping in Lo
- 11:41Fine-grained rate control
- 13:03Experimental results
- 14:47Key takeaways
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