A.10 Uplink media streaming using content preparation with both AF and AS deployed in the trusted Data Network

26.5013GPP5G Media Streaming (5GMS)General description and architectureRelease 18TS

In this collaboration scenario shown in figure A.10-1, both the 5GMSu AS and 5GMSu reside in the trusted Data Network. Additionally, reference point M2u is used for content egest to the external 5GMSu Application Provider.

Figure A.10-1: Uplink media streaming with AF and AS in trusted Data Network

Figure A.10‑2 provides a high-level call flow for this collaboration scenario.

Figure A.10-2: Call flow for uplink media streaming using content preparation with AF and AS in trusted Data Network

Steps:

1. The 5GMSu Application Provider creates a Provisioning Session with the 5GMSu AF.

2. The 5GMSu Application Provider requests the 5GMSu AF to create one Content Publishing Configuration that defines the instructions for content egest (M1u).

3. The 5GMSu AF, based on the received Content Publishing Configuration, requests the 5GMSu AS to confirm the availability of content resources for content preparation.

4. The 5GMSu AF acknowledges the successful creation of the Content Publishing Configuration to the 5GMSu Application Provider (M1u).

At some later point in time:

5. The 5GMSu Application Provider provides Service Access Information to the 5GMS-Aware Application at reference point M8u.

6. The 5GMS-Aware Application requests the 5GMSu Client to start an uplink streaming session (M6u/M7u).

7. The 5GMSu Client requests that the 5GMSu AF initialises uplink media streaming, including any content preparation required by the Content Publishing Configuration (M5u).

Alternatively:

8. The 5GMS-Aware Application requests the 5GMSu Client to start an uplink streaming session (M6u/M7u).

9. The 5GMSu Client requests Service Access Information from the 5GSMu AF at reference point M5u.

As a consequence:

10. The 5GMSd AF requests initialisation of the content preparation process (M3u).11. The 5GMSd AS initialises the content preparation process, if is not already running (M3u).

12. The 5GMSd AF acknowledges the initialisation of the content preparation process (M3u).

Then:

13. If remote configuration and control is activated, the 5GMSu AF configures and controls the 5GMSu Client remotely (M5u).

14. The 5GMSu Client performs media session handling for the uplink streaming session.

15. Uplink media streaming starts from the 5GMSu Client to the 5GMSu AS (M4u).

16. If content preparation was initialized at step 11 or before, the uplinked media may be manipulated by the 5GMSu AS prior to egest.

17. Media streaming egest starts from the 5GMSu AS to the 5GMSu Application Provider (M2u).

Finally:

18. The 5GMSu AS releases its resources after observing a period of interactivity.

NOTE: This step is implementation dependent.