This Technical Report collects information on eXtended Reality (XR) in the context of 5G radio and network services. Extended reality (XR) refers to all real-and-virtual combined environments and associated human-machine interactions generated by computer technology and wearables. It includes representative forms such as augmented reality (AR), mixed reality (MR), and virtual reality (VR) and the areas interpolated among them. In this Technical Report, baseline technologies for XR type of services and applications are introduced outlining the QoE/QoS issues of XR-based services, the delivery of XR in the 5G system, and an architectural model of 5G media streaming defined in TS 26.501. In addition to the conventional service category, interactive, streaming, download, and split compute/rendering are identified as new delivery categories. A survey of 3D, XR visual and audio formats is also provided. Use cases and device types are classified, and processing and media centric architectures are introduced. This includes viewport independent and dependent streaming, as well as different distributed computing architectures for XR. Core use cases of XR include those unique to AR and MR in addition to those of VR discussed in TR 26.918, ranging from offline sharing of 3D objects, real-time sharing, multimedia streaming, online gaming, mission critical applications, and multi-party call/conferences. Based on the details in the report, proposals for potential standardisation areas are documented.

The present document collects information on eXtended Reality (XR) in the context of 5G radio and network services. The primary scope of the present document is the documentation of the following aspects:

• Introducing Extended Reality by providing definitions, core technology enablers, a summary of devices and form factors, as well as ongoing related work in 3GPP and elsewhere,
• Collecting and documenting core use cases in the context of Extended Reality,
• Identifying relevant client and network architectures, APIs and media processing functions that support XR use cases,
• Analysing and identifying the media formats (including audio and video), metadata, accessibility features, interfaces and delivery procedures between client and network required to offer such an experience,
• Collecting key performance indicators and Quality-of-Experience metrics for relevant XR services and the applied technology components,
• Drawing conclusions on the potential needs for standardisation in 3GPP.

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

• References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.