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Learn about OTTER, a novel approach to optimizing 5G network performance across multiple wide-area networks in this 13-minute conference presentation from NSDI '25. Discover how the cloudification of 5G networks creates new challenges when software network functions migrate to cloud datacenters, requiring traffic to traverse both operator WANs and cloud WANs with different performance characteristics. Explore the technical solution that orchestrates end-to-end paths across multi-WAN overlays, achieving significant performance improvements including 13% more throughput, 15% lower round-trip time, 45% reduced jitter, and dramatic loss reduction from 0.06% to under 0.001%. Examine the scalable optimization prototype implementation that allocates 26-45% more network bytes compared to greedy baseline approaches while satisfying service demands for more flows. Understand the complexities of placing 5G flows across heterogeneous WANs with varying performance and reliability characteristics, edge and datacenter resource constraints, and interference from competing traffic flows.
