This TS specifies the overall stage 2 level functionality for Policy and Charging Control that encompasses the following high level functions for IP-CANs (e.g. GPRS, I-WLAN, Fixed Broadband, etc.):
Flow Based Charging for network usage, including charging control and online credit control, for service data
flows and application traffic;
Policy control (e.g. gating control, QoS control, QoS signalling, etc.).
Note: The present document specifies the generic PCC aspects within the body, while the specifics for each type of IP-CAN
are specified in Annexes. For one type of IP-CAN the corresponding clause in an Annex shall be understood to be a
realization of the TS main body. The Annexes are therefore not stand-alone specifications for an IP-CAN. Annexes may
specify additional restrictions to the specification body.