Patent ID: 7626929

Claim:
A method, comprising: receiving at an ingress session exchange device a call admission control (CAC) condition and a CAC value associated with an endpoint of a first egress session exchange device and CAC-related information associated with an endpoint of a second egress session exchange device, the ingress session exchange device being at a border of a session over internet protocol network, wherein the CAC-related information is associated with a non-predictive time period; calculating a predictive-CAC value based on the CAC-related information that is valid during a predictive time period being after the non-predictive time period when the CAC-related information associated with the predictive time period is not available; performing a first call admission calculation at the ingress session exchange device to determine whether the CAC condition is satisfied, the first call admission calculation being based on the predictive-CAC value; and performing a second call admission calculation at the ingress session exchange device when the CAC condition is unsatisfied, the second call admission calculation being based on the predictive-CAC value.