G.3 Reacting Node

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

A PCC functional element acting as a reacting node applies the requested traffic reduction received in OC-OLR AVPs in answer messages to corresponding applicable requests, as per IETF RFC 7683 [33].

How it achieves the requested traffic reduction is implementation dependent.

Diameter requests related to priority traffic (e.g. MPS) as described in 3GPP TS 22.153 [58] and emergency have the highest priority. If required by the regional/national regulatory and operator policies, and when the reacting node is able to detect priority traffic, priority traffic shall be exempted from throttling due to Diameter overload control up to the point where requested traffic reduction cannot be achieved without throttling the priority traffic. Relative priority amongst various priority traffic (e.g. MPS) and emergency traffic is subject to regional/national regulatory and operator policies.