User Plane Part of Policy Rule Enforcement

Cisco UPF provides different enforcement mechanisms based on policy received from the SMF. The UPF is the boundary between the Access and IP domains and is the ideal location to implement policy-based enforcement. The pcc-rules provided by the PCF and the pre-defined rules on the SMF are uploaded over the N4 interface and installed on the UPF on a per-DNN basis. This allows for dynamic policy changes that enable differentiated charging and QoS enforcement.