Hybrid connection admission control in ATM networks

The author proposes a new connection admission control (CAC) method called hybrid CAC. The hybrid CAC provides two cell loss rate classes, and requires the declaration of each virtual circuit´s (VC´s) peak cell rate as a traffic parameter. The admission of a low-priority VC is decided based on the measured number of cells arriving from connected VCs and the specific peak rates. The bandwidth assigned to a high-priority VC is the specified peak, but the bandwidth that is not actually used by the high-priority VC can be used by low-priority VCs. Therefore, the hybrid CAC attains high utilization and high quality for high-priority VCs with only the peak cell rate needing to be specified