Admission Control
For guaranteed service, source asks the network for rate of token bucket, and uses P-G worst-case delay bound
For predictive service, source specifies its token bucket parameters, and flow is admitted if
- sum of its rate and measured guaranteed+predictive rate < 0.9 capacity (say, 10% for datagram)
- for each lower or equal priority, the delay bound is not violated
- measured quantities should be conservative to control delay violations
Network utilization can be increased in the presence of predictive flows, since measured bounds are smaller