u and i: Cooperative Multipath MASQUE Scheduling with HTTP/3 Prioritization
Multipath QUIC aggregates the bandwidth available to multihomed clients. Path and stream scheduling policies are known to affect performance but rely on static, general-purpose approaches that fail to meet application requirements. We present a framework to request novel proxy-based services that require scheduling in network topologies with multiple paths to an HTTP/3 proxy. It repurposes the Extensible Prioritization Scheme (EPS) to convey tailored schedulers at the connection level. With our own open-source MASQUE implementation, Nada, we demonstrate that interplay by selecting a custom stream-aware scheduler at the proxy. A reproducible measurement campaign shows that such client-proxy cooperation with EPS as a platform enables Quality of Service to be requested for specific flows. Our contribution lays the groundwork for adaptive solutions that dynamically optimize for desired behaviors, such as handling path heterogeneity, without involving the target server.