Worst-case Fair Weighted Fair Queueing

The WFQ formula :

Fik:= max[V(aik), Fik-1] + Lik / ?i

Define this to be the virtual start time Sik of pik:

Sik = max[V(aik), Fik-1]

--- this is the (virtual) time at which GPS would’ve started servicing pik

Define a packet pik to be eligible at time t iff V(t) ? Sik

WF2Q: Always schedule the eligible packet with the smallest label Fik