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QCON: Seamless QoE-Aware 5G Streaming via Multi-Connectivity

on YouTube 16m
Talkat NSDI '26 · 2026-05-04..05-06· [networking]

speakers

name:Goodsol Lee
linkedin:goodsol-lee-25a75b31a
name:Junhong Min
links:none on file
name:Seyeon Kim
links:none on file
name:Juheon Yi
linkedin:juheon-yi-51871718a
name:Kwang Taik Kim
links:none on file
name:Mung Chiang
links:none on file
name:Sangtae Ha
links:none on file
name:Kyunghan Lee
links:none on file
name:Saewoong Bahk
links:none on file

resources

video:https://youtu.be/bzGXb57aiFA
slides:none on file

summary

QCON leverages 5G multi‑connectivity inside the RAN to infer frame‑level QoE by parsing RTP headers and to drive a QoE Monitor that only uses backup 4G capacity when frame deadlines risk missing. It implements jitter-adaptive multi-link scheduling to keep application congestion controllers stable and a priority-based re-injection using RAN priority queues for urgent frames. Prototype runs in an Open‑RAN testbed (OpenAirInterface, USRP B210, Pixel phones) and on driving traces; it reports about 2.1× higher bitrates and 4–5× improved tail frame rates with efficient radio use.

AI-written summary · about

chapters (8)

  1. 0:00Q-CoN and 5G streaming challenges
  2. 1:24Limitations of 5G and multipath transport
  3. 4:36Multi-connectivity in 5G RAN
  4. 7:52Tracking frame-level QoE in RAN
  5. 10:37Jitter-adaptive multi-link scheduling
  6. 12:03Priority-based multi-link re-injection
  7. 13:06Q-CoN evaluation in emulation and tests
  8. 15:14Conclusion

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