Some fair measurement-based admission controls

An admission control mechanism is performed while establishing a new connection to determine whether that connection should be admitted. Admittance depends on whether the QoS (quality of services) of this new connection can be supported and whether the QoS of the existing connections can be maintained. Various admission controls have been designed to improve network utilization. However, utilization optimization is the only goal, serious unfairness occurs among connections with different QoS requirements; that is, large-bandwidth connections are hardly admitted. A good admission control should achieve not only high utilization but also good fairness. This paper develops four novel measurement-based admission controls, namely, number guarantee, bandwidth segment, half partition, and request holding. Simulation results indicate that our proposed algorithms achieve a higher utilization and fairness than does the measure sum algorithm, presently the fairest known algorithm