Content for TS 26.501 Word version: 18.0.0

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A.15 Hybrid uplink and downlink media streaming using content preparation
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A.15 Hybrid uplink and downlink media streaming using content preparation |R18| p. 128

This scenario represents a hybrid end-to-end form of collaboration across uplink media streaming and downlink media streaming services. An external 5GMS Application Provider relies on the 5GMS System to support both the uplink streaming media transmission by 5GMSu Clients and subsequent distribution of that content via downlink media streaming for reception by 5GMSd Clients within the same 5GMS System.

Copy of original 3GPP image for 3GPP TS 26.501, Fig. A.15-1: Hybrid uplink and downlink media streaming

Figure A.15-1: Hybrid uplink and downlink media streaming
(⇒ copy of original 3GPP image)

Figure A.15-2 shows the call flow for this scenario. To simplify the call flow, the content preparation process is omitted.

Copy of original 3GPP image for 3GPP TS 26.501, Fig. A.15-2: Call flow for hybrid uplink and downlink media streaming using content preparation

Figure A.15-2: Call flow for hybrid uplink and downlink media streaming using content preparation
(⇒ copy of original 3GPP image)

Steps:

Step 1.

The 5GMSd Application Provider creates a Provisioning Session with the 5GMSd AF (M1d).

Step 2.

The 5GMSd Application Provider provisions the 5GMSD AF with a Content Hosting Configuration.

Step 3.

The 5GMSdAF, based on the received Content Hosting Configuration, requests the 5GMSd AS to confirm the availability of distribution resources (M3d, procedures not specified).

Step 4.

The 5GMSd AF acknowledges to the 5GMSd Application Provider the successful creation of the Content Hosting Configuration (M1d).

Step 5.

The 5GMS Application Provider creates a Provisioning Session with the 5GMSu AF (M1u).

Step 6.

The 5GMSu AF requests the 5GMSu AS to confirm the uplink resources availability. (M3u, procedures not specified).

Step 7.

The 5GMSu AF acknowledges to the 5GMSu Application Provider of the successful provisioning (M1u).

At some later point in time:

Step 8.

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

Step 9.

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

Step 10.

The 5GMSu Client requests that the 5GMSu AF initialises uplink media streaming (M5u).

Alternatively:

Step 11.

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

Step 12.

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

At some later point in time:

Step 13.

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

Step 14.

Uplink media streaming starts from the 5GMSu Client to the 5GMSu-like AS (M4u').

Step 15.

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

Step 16.

If content preparation was provisioned in step 6, the uplinked media may be manipulated by the 5GMSu AS prior to being streamed to the 5GMSd AS.

Step 17.

The 5GMSu AS streams the content to the 5GMSd AS (I2, not specified).

Steps 18-22 concern the 5GMS downlink streaming process:

Step 18.

The 5GMS Application Provider optionally provides the service access information to the 5GMSd-Aware Application (M8d).

Step 19.

The 5GMS-Aware Application requests the 5GMSd Client to start an uplink streaming session (M6d/M7d).

Step 20.

If Service Access Information was not provided in step 14, the 5GMSd Client requests this information from the 5GSMd AF (M5d).

Step 21.

The 5GMSd Client requests the start of the downlink streaming session from the 5GSMd AF (M5d).

Step 22.

The downlink media streaming starts (M4d).

Finally:

Step 23.

The 5GMSu AS releases its uplink content preparation resources after observing a period of interactivity.

Step 24.

The 5GMSd AS releases its downlink content preparation resources after observing a period of interactivity.