Content for TS 26.501 Word version: 18.6.0

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5.4 Content Hosting Configuration for downlink Media Streaming 5.4.1 General 5.4.2 Media ingest procedure
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5.4 Content Hosting Configuration for downlink Media Streaming p. 94

5.4.1 General p. 94

The 5G Media Streaming architecture defines an interface (M1d) for provisioning which offers the procedures to configure content ingest for downlink media streaming over 5G. Once a Provisioning Session is established using the API at interface M1d, content hosting can be configured. The control part of the ingest interface may be performed through the NEF. Ingested content is accessible from the 5GMSd AS at interface M4d through a new location identifier.

The M2d interface supports the ingest of the following types of content:

Live streaming content.
On-demand streaming content.
Static files such as images, scene descriptions, etc.

The 5GMSd AF provides an API at interface M1d that allows a 5GMSd Application Provider to create/update/delete a Content Hosting Configuration. A Content Hosting Configuration contains all the parameters for a particular content ingest and distribution setup.

5.4.2 Media ingest procedure p. 95

The media ingest procedure is illustrated in Figure 5.4-1:

Copy of original 3GPP image for 3GPP TS 26.501, Fig. 5.4-1: Media ingest procedure

Figure 5.4-1: Media ingest procedure
(⇒ copy of original 3GPP image)

The steps are as follows:

Step 1.

Initialization: the 5GMSd Application Provider discovers the entry point and authenticates itself with the 5GMSd AF.

Step 2.

Create Content Hosting Configuration: the 5GMSd Application Provider creates a new Content Hosting Configuration for all media formats of its content through the 5GMSd AF. The configuration specifies a domain name, supplies a certificate for HTTPS access to the content, sets the caching rules per media type, indicates the distribution area (e.g. through geofencing), distribution protocol, the desired content preparation, URL signing, etc. Upon successful configuration, the 5GMSd AF responds with a Content Hosting Configuration identifier, and the location of the 5GMSd AS to which to send the content (if using the push mode).

Step 3.

Provision 5GMSd AS instance(s): The 5GMSd AF configures the related 5GMSd AS instance(s) to prepare for media ingest for that particular Content Hosting Configuration. As well as configuring any necessary Server Certificates and/or Content Preparation Templates, this step may involve instructing the 5GMSd AS instance(s) to set appropriate caching rules, to perform URL signature validation and to limit access through geofencing. The 5GMSd AS(s) responds indicating whether the configuration was successful or not.

In case of partial failure, the configuration shall be removed from all 5GMS AS(s) that succeeded.

Step 4.

Confirm configuration information: The 5GMSd AF communicates the Content Hosting Configuration of the 5GMSd AS(s) back to the 5GMSd Application Provider for further media push or pull.

In the case where not all requested media formats could be accommodated during the previous step, the 5GMSd AF shall indicate these in the failure response.

Step 5.

Publish Media Player Entries: The 5GMSd Application Provider shall then publish the Media Player Entries to the 5GMSd-Aware Application to enable access to the content, possibly in different formats.

Step 6.

Media ingest: The 5GMSd AS(s) may start pulling or receiving content (if using push mode) from the 5GMSd Application Provider. The 5GMSd AS performs the requested content preparation prior to providing access to the content.

The 5GMSd Application Provider may update a Content Hosting Configuration subsequently to modify some of its parameters. The subset of parameters that can be updated may be limited by the 5GMSd AF.