The present document defines a FLUS source entity and a FLUS sink entity that can support point-to-point transmission of speech/audio, video, and text. It defines media handling (e.g., signalling, transport, packet-loss handling, and adaptation). The goal is to ensure a reliable and interoperable service with a predictable media quality while allowing for flexibility in the service offerings.
A FLUS source entity, which may be embedded in a single UE, or distributed among a UE and separate audio-visual capture devices, may support all or a subset of the features specified in this document.
When used as a generic framework, only the F-C procedures for establishing the FLUS session are required to be supported by the FLUS source and the FLUS sink entities, and no other feature or procedure specified in this document is mandated. Impact on the service quality and network capacity is left to the discretion of the implementation and the service utilizing the framework. For example, configuration of media formats and codecs follows the requirements of the respective service.
When offered as part of a 3GPP IMS/MTSI service, the FLUS source and the FLUS sink entities are required to support the IMS control plane and media plane procedures, and the service quality is determined by the MTSI service policy.
The specification is written in a forward-compatible way in order to allow additions of media components and functionality in releases beyond Release 15.
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.
: "Vocabulary for 3GPP Specifications".
Recommendation ITU-R BS.2051-1 (06/2017): "Advanced Sound System for Programme Production".
ISO/IEC 23090-2:2019: "Information technology - Coded representation of immersive media - Part 2: Omnidirectional media format".
: "IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction".
: "Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs".
: "Conferencing using the IM Multimedia (IM) Core Network (CN) subsystem; Stage 3".
: "Numbering, addressing and identification".
: "3G security; Access security for IP-based services".
: "3G security; Network Domain Security (NDS); IP network layer security".
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: "Architecture enhancements to facilitate communications with packet data networks and applications".
: "5G Media Streaming (5GMS); General description and architecture".
ISO/IEC DIS 23090-8: "Information technology -- Coded representation of immersive media -- Part 8: Network based media processing" (under development).
"The Session Description Protocol (SDP) Label Attribute" (August 2006).
: "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification".
: "NR; Medium Access Control (MAC) protocol specification".
OMA-ERELD-DM-V1_2-20070209-A: "Enabler Release Definition for OMA Device Management, Approved Version 1.2".
: "Guidelines on the Framework for Live Uplink Streaming (FLUS)".
: "5G Media Streaming (5GMS); Profiles, codecs and formats".
(2016): "RTP Payload Format for High Efficiency Video Coding (HEVC)"
: "Codec for Enhanced Voice Services (EVS); Detailed Algorithmic Description".
(2007): "RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs".
(2011): "RTP Payload Format for MPEG-4 Audio/Visual Streams".
OASIS Standard, MQTT Version 5.0: https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html
: Conferencing using the IP Multimedia (IM); Core Network (CN) subsystem;