PCC refers to "Policy and Charging Control". It is a framework that enables mobile network operators to ensure consistent Quality of Service (QoS) for various services and applications, and implement online charging and offline charging to mobile network users.

PCC can dynamically apply policies and charging rules based on subscriber profiles, service requirements, and network conditions.

The key components of the PCC framework in mobile networks are,

• PCRF (Policy and Charging Rules Function).
• PCEF (Policy and Charging Enforcement Function).
• Online Charging System (OCS).
• Offline Charging System (OFCS).
• Other Application Functions (AF), such as the P-CSCF in IMS Network.