Pcrf and pcc rule setting method in a mobile communication network

A Policy and Charging Enforcement Function (PCEF) for setting a Policy and Charging Control (PCC) rule in a mobile communication network, the PCEF comprising:

• a receiver for receiving a command message including a monitoring key list including at least one monitoring key corresponding to a PCC rule and a number of instances monitored in a corresponding service, from a Policy and Charging Rules Function (PCRF);
• a setting unit for setting the PCC rule based on the command message and setting a monitoring key of the PCC rule according to the at least one monitoring key;
• and
• a monitoring processor for setting a range of monitoring in consideration of the number of instances and the at least one monitoring key, and performing monitoring based on the set range of the monitoring.