PreTE: Traffic Engineering with Predictive Failures#
SIGCOMM 2025 digest Program Adjacent pick Coimbra · 8–11 September 2025
Congcong Miao et al. (Tencent, MIT, UCSB, Meta, Tsinghua)
Why: Fiber cuts are rare-but-disruptive WAN events; folding measured optical-layer degradation into TE is a fresh, physically grounded angle on availability.
What: A TE system that factors dynamic fiber-cut probabilities into tunnel planning, supporting up to 2x more demand at equal availability.
How: Per-second optical-layer measurements show failure probability jumps orders of magnitude in an ephemeral degradation state; PreTE predicts from that and proactively updates tunnels then re-optimizes allocation.
Where applicable: WAN operators with optical-layer telemetry; assumes access to per-second optical data.