G.1 General

29.2133GPPPolicy and charging control signalling flows and Quality of Service (QoS) parameter mappingRelease 17TS

Support for Diameter overload control by PCC functional elements is optional. Unless otherwise stated, the procedures defined in this Annex assume that a PCC functional element supports the Diameter overload control mechanism.

IETF RFC 7683 [33] specifies the Diameter overload control mechanism. This includes the definition of Diameter overload related AVPs and the Diameter overload related behavior.

To indicate support of the Diameter overload control mechanism, each PCC functional element shall include the OC-Supported-Features AVP in every Diameter request and answer as defined in IETF RFC 7683 [33].

Each PCC functional element (e.g. PCRF, PCEF, AF, etc) shall act asa reacting node and asa reporting node as defined in IETF RFC 7683 [33].