Hierarchical service-curve based scheduling
“H-FSC allows a more flexible resource management than H-PFQ by decoupling the delay and bandwidth allocation. From a conceptual point of view, H-FSC is the first algorithm that goes beyond Fair Queueing and still satisfies all important requirements in integrated services networks.”
“HFSC, along with a packet classifier and a graphical user interface program has been implemented in both NetBSD 1.2D and FreeBSD 2.2.6. This implementation supports IETF Integrated Services (intserv) service models and RSVP signaling. It also supports most standard CAIRN testbed network hardware. [...] Software packages for both NetBSD and FreeBSD are now freely available.”