POLYCORN: Data-driven Cross-layer Multipath Networking for High-speed Railway
summary
Collects a 1.79 TB GPS-labeled TCP-LTE dataset over 28,800 km and deploys a system on the Beijing–Shanghai HSR gateway at ~300 km/h. POLYCORN uses a robust base scheduler plus composable schedulerlets that trigger on concrete events: handover-failure rejection to avoid losses, tail-aware path rejection to cut session tails, redundant injection for idle-path recovery and extended rejection after repeated timeouts. Real-world evaluation across 40 trips (tests repeated 50×) shows up to 242% goodput gain and 45% shorter instant-message delivery.
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chapters (5)
- 0:00Start
- 4:10Inaccurate Measurements Hurt Performance
- 10:29Composable Scheduling Framework
- 11:31Deployment on HSR LTE Gateway
- 12:49On-board Evaluation
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