The Policy and Charging Application (PCA) provides mechanisms to manage the overload and congestion that can occur on the Policy and Charging Application and SBR. The PCA might receive ingress messages at a rate higher than the engineered capacity. The internal queues on the PCA might experience higher utilization level than configured. The same might happen on the SBR servers, directly or indirectly resulting from the overloaded traffic from the network or from the PCA.