HiP4-UPF: Towards High-Performance Comprehensive 5G User Plane Function on P4...

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Presents HiP4-UPF, a full-featured 5G User Plane Function implemented mostly on commodity P4 programmable switches (except packet buffering). It analyzes a baseline P4 UPF, identifies rule-storage and latency bottlenecks, and introduces a three-tier rule-storage optimization plus a pendulum-table-access with selective usage-pulling scheme to cut operational latency. Evaluation on a commodity P4 switch shows support for ~2× the devices of the baseline and 1.9× vs SD-Fabric, and throughput gains of 9–619% over UPFs in two open-source 5G emulators.

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