18 Event exposure at R5 and R6

26.5123GPP5G Media Streaming (5GMS)ProtocolsRelease 17TS

The Naf_EventExposure service specified in TS 29.517 [46] shall be used by event consumer to subscribe to the following types of 5G Media Streaming event notifications, identified by their respective Event IDs, from the Data Collection AF instantiated in the 5GMS AF, and subsequently to receive such notifications:

1. Media Streaming QoE Event, as specified in clause 5.6.2.23 of [46], comprising

a) 3GPP-defined QoE metrics information, and

b) non-3GPP-defined QoE metrics information.

2. Media Streaming Consumption Event, as specified in clause 5.6.2.24 of [46].

3. Media Streaming Network Assistance Invocation Event, as specified in clause 5.6.2.25 of [46].

4. Media Streaming Dynamic Policy Invocation Event, as specified in clause 5.6.2.26 of [46].

5. Media Streaming Access Event, as specified in clause 5.6.2.27 of [46].

In this release, eligible event consumer subscribers to the Naf_EventExposure service as specified in [46] are the following:

– The NWDAF defined in TS 23.288 [47].

– The Event Consumer AF defined in TS 26.531 [46] when it is deployed in the Trusted DN.

– The NEF defined in TS 23.501 [2] when it is used to expose the Naf_EventExposure service to functions outside the Trusted DN via the Nnef_EventExposure service defined in TS 23.502 [45].

Implementations of the Data Collection AF instantiated the 5GMS AF shall support negotiation of the optional features relating to 5G Media Streaming specified in table 5.8‑1 of TS 29.517 [46]. Feature negotiation by event consumers is achieved as specified in clause 5.8 of [46].

Annex A (informative):
5GMS Parameter propagation for DASH Streaming