I.3 Mapping of EPS-specific terms to 5GS

24.2823GPPMission Critical Data (MCData) signalling controlProtocol specificationRelease 18TS

I.3.1 Session aspects

In 5GS, the PDU session is the equivalent of a PDN connection in EPS. The requirements and configurations for a PDN connection throughout this document shall also apply to PDU sessions.

I.3.2 Bearer aspects

When using the 5GS, a bearer is provided by a 5GS QoS flow. The requirements, procedures, and configurations for a bearer throughout this document, including those stating EPS explicitly (e.g., EPS bearer priority), shall also apply to QoS flows.

I.3.3 Resource sharing

In 5GS, the exchange of the QoS characteristics of the required resources takes place by means of direct interaction between SIP core and PCF using N5 reference point or Rx reference point or indirectly utilizing N33 reference point between MC service server and NEF. Thus, the requirements for resource sharing of clause 18 apply with the following clarifications:

1) to control resource sharing, interfacing to PCF is using the N5 reference point or the Rx reference point;

2) optionally, QoS characteristics for resources can be exchanged indirectly utilizing N33 reference point between the MC service server and NEF.