Method and apparatuses for tdf session establishment

A Policy and Charging control Rules Function “PCRF” server of a Policy and Charging Control “PCC” architecture with a Policy and Charging Enforcement Function “PCEF” device and a Traffic Detection Function “TDF” device (2), the PCRF server comprising:

• a first interface unit for signalling establishment of an IP Connectivity Access Network “IP-CAN” session from a PCEF device;
• a processing unit for selecting a TDF device to detect and report traffic through the IP-CAN session, for determining PCC rules to be installed at the PCEF device, and for determining Application and Detection Control “ADC” rules to be installed at the TDF device;
• a second interface unit for initiating establishment of a TDF session with the TDF device and for submitting towards the TDF device the ADC rules to be installed for the IP-CAN session;
• and
• the first interface unit arranged for submitting towards the PCEF device the PCC rules to be installed for the IP-CAN session.

A Traffic Detection Function “TDF” device of a Policy and Charging Control “PCC” architecture with a Policy and Charging control Rules Function “PCRF” server and a Policy and Charging Enforcement Function “PCEF” device, the TDF device comprising:

• an interface unit for initiating establishment of a TDF session with a PCRF server, and for receiving Application and Detection Control “ADC” rules for an IP Connectivity Access Network “IP-CAN” session from the PCRF server;
• a processing unit for installing the ADC rules for the IP-CAN session;
• and
• a detector for detecting traffic through the IP-CAN session based on the installed ADC rules.