Characterizing Physical-Layer Transmission Errors in Cable Broadband Networks
Talkat 19th USENIX Symposium on Networked Systems Design and Implementation (NSDI '22) · 2022-04-04..04-06·
summary
Uses DOCSIS 3.0 codeword counters pulled from CMTS and cable modems across 77K+ devices on 394 HFC segments over 16 months, sampled roughly every 4 hours, to separate physical-layer transmission errors from congestion. Finds per-segment codeword error rates span more than six orders of magnitude (about O(10−6%) to O(1%)), with ~1% of segments exceeding 1% loss, and estimates 12–25% of FCC-measured packet loss stems from physical-layer errors; persistently high-error segments do not yield more trouble tickets.
AI-written summary · about
chapters (15)
- 0:00Introduction
- 1:16Packet Loss Rate
- 2:03Packet Loss Source
- 3:02Importance
- 4:08Goals
- 4:30Roadmap
- 4:56Methodology
- 7:13Datasets
- 8:06Data Collection
- 9:33Complementary CDF
- 12:35Packet Loss Distribution
- 13:09Results
- 14:34Ticket Reporting
- 15:40Conclusions
- 16:38Outro
related talks
17mHEDGE: Traffic Engineering with Probabilistic Link Capacities
21mCableMon: Improving the Reliability of Cable Broadband Networks via Proactive Network
23mACK to the Future: TCP in 2025
09m20,000 Leagues Inside the Optical Fiber
29mNetwork Fault Finding System: Packet Loss Triangulation
50mCAN - Deep Dive into Baud Rate & Error Handling Model
20mETC: An Elastic Transmission Control Using End-to-End Available Bandwidth...
51mThe Undersea Cable Network