P4EC: Enabling Terabit Edge Computing in Enterprise 4G LTE
summary
P4EC is a working proof‑of‑concept that inserts a P4 programmable switch between eNodeB and cloud EPC to create a local exit for latency‑sensitive flows. It runs on a Barefoot Tofino delivering 2 Tb/s aggregate throughput on multiple 100GbE ports, performs GTP decap/encap and NAT in‑switch by monitoring S1 control to learn TIMSI/tunnel IDs, and was tested on a live LTE lab network (Galaxy S8, Moto, NextEPC). Results show a ~$9k hardware cost and a 300 ms median web latency reduction and >100 ms video delay improvement.
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chapters (11)
- 0:00Introduction
- 0:34Background
- 1:41Network Structure
- 3:16Latency Issues
- 4:06What is P4EC
- 4:56P4EC Switch
- 5:35LTE Network
- 7:22Video Streaming
- 8:10Advantages
- 8:50Implementation Design Decisions
- 11:42Conclusion
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