The present document defines the Stage 2 policy and charging control framework for the 5G System specified in TS 23.501
and TS 23.502
The policy and charging control framework encompasses the following high level functions:
Flow Based Charging for network usage, including charging control and online credit control, for service data flows;
Policy control for session management and service data flows (e.g. gating control, QoS control, etc.);
Management for access and mobility related policies;
Management for UE access selection and PDU session selection related policies.
It refers to the policy and charging control functionality specified in TS 23.203
for policy and charging control for PDU sessions, depicting the differences where those exist.