A.3 Functional elements
29.1543GPPRelease 17Service capability exposure functionality over Nt reference pointTS
A.3.1 PCRF
The PCRF is a functional element that encompasses policy control decision and flow based charging control functionalities.
The PCRF receives event monitoring configuration (e.g. location request) from the SCEF and applies corresponding procedure over IP-CAN session. The PCRF reports the subscribed event to the SCEF after receiving report of the IP-CAN session.
A.3.2 SCEF
The SCEF is a functional element which provides a means to securely expose the services and capabilities provided by 3GPP network interfaces.
The SCEF receives event monitoring configuration from an SCS/AS which requests for the information (e.g. location) for a group of UEs, and reports such information to the SCS/AS.