Hairpin: Rethinking Packet Loss Recovery in Edge-based Interactive Video Streaming
Talkat 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24) · 2024-04-16..04-18·
summary
Hairpin rethinks loss recovery for edge-based interactive video by choosing per-round mixes of original packets, retransmissions, and redundancy rather than a fixed FEC rate. Evaluation uses ns-3 simulation and production deployments, with an open source simulator and a data center patch, and demonstrates a 40% bandwidth reduction and a 32% deadline miss reduction on average. The system adapts redundancy aggressively as deadline rounds shrink and intentionally waits when extra retransmit opportunities exist.
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chapters (7)
- 0:00The need for low latency
- 2:31Latency and tail percentiles
- 4:48Redundancy and RTT evolution
- 7:02Proposed joint optimization
- 9:33Performance benefits
- 13:16Design challenges and evaluation
- 15:04Conclusion and takeaways
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