Hierarchical-PFQ
Proposed in
- J. C. R. Bennett and H. Zhang. Hierarchical packet fair queueing algorithms. IEEE/ACM Transactions on Networking 5(5), pages 675--689, October 1997.
Implements a packet fair queueing algorithm (WFQ/ WF2Q) at each internal node in the tree
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- Each such internal node n must maintain its own virtual time function Vn(t)
This virtual time function must account for the fact that its server is a variable-rate server:
- The service-rate that a server can offer depends upon whether its sibling nodes are backlogged