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Content for  TR 26.998  Word version:  18.1.0

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6.2 Immersive media downlink streaming  6.2.1 Introduction  6.2.2 Relevant use cases  6.2.3 Architectures  6.2.3.1 STAR-based  6.2.3.2 EDGAR-based 
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6.2  Immersive media downlink streaming  p. 56

6.2.1  Introduction  p. 56

This clause introduces the case where immersive AR/MR media is streamed to a 5G AR UE using basic functionalities as defined in 5G Media Streaming for downlink (5GMSd).

6.2.2  Relevant use cases  p. 57

The following use cases are relevant to this scenario.
  • UC#2: AR sharing
  • UC#14: AR Streaming with Localization Registry
  • UC#17: AR remote advertising
  • UC#18: Streaming of volumetric video for glass-type MR Devices
An immersive video which was pre-captured or pre-generated are stored in the server of an application provider. On a user's request, the desired immersive video is streamed to 5G AR UE throughout 5GMS architecture. The user is able to play, pause, stop, and enjoy the trick play while watching the video. In this use case, the scene description of the pre-generated video may get updated as the video progresses. However, these updates are independent to the user's interaction or change of pose.
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6.2.3  Architectures  p. 57

6.2.3.1  STAR-based  p. 57

Figure 6.2.3.1-1 provides a basic extension of 5G Media Streaming for immersive media downlink using a STAR UE, when all essential AR/MR functions in a UE are available for typical media processing use cases. In addition to media delivery, also scene description data delivery is included.
Copy of original 3GPP image for 3GPP TS 26.998, Fig. 6.2.3.1-1: STAR-based 5GMS Downlink Architecture
Figure 6.2.3.1-1: STAR-based 5GMS Downlink Architecture
(⇒ copy of original 3GPP image)
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6.2.3.2  EDGAR-based  p. 57

Figure 6.2.3.2-1 provides a basic extension of 5G Media Streaming download for immersive media using an EDGAR UE. In this context, it is expected that the edge will pre-render the media based on pose and interaction information received from the 5G EDGAR UE. It is also highlighted, that the 5G EDGAR UE may consume the same media assets from an immersive media server as the STAR UE according to Figure 6.2.3.1-1, but the communication of the edge server to this immersive server is outside of the considered 5G Media Streaming architecture.
Copy of original 3GPP image for 3GPP TS 26.998, Fig. 6.2.3.2-1: EDGAR-based 5GMS Downlink Architecture
Figure 6.2.3.2-1: EDGAR-based 5GMS Downlink Architecture
(⇒ copy of original 3GPP image)
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