TR 26.923
Study on Media Handling aspects
of IMS-based Telepresence

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V19.0.0 (PDF) 2025/09 32 p.

V18.0.0 2024/03 32 p.

V17.0.0 2022/03 32 p.

V16.0.0 2020/06 32 p.

V15.0.0 2018/06 31 p.

V14.0.0 2017/03 32 p.

V13.1.0 2015/12 32 p.

Rapporteur:: Dr. Curcio, Igor
Nokia Corporation

full Table of Contents for TR 26.923 Word version: 18.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content

Introduction p. 5

Scope p. 6

References p. 6

Definitions and abbreviations p. 8

3.1	Definitions p. 8
3.2	Abbreviations p. 9

Overview of IMS-based Telepresence in 3GPP p. 9

4.1

Introduction p. 9

4.2

Service Aspects p. 9

4.2.1	Overview p. 9
4.2.2	Use Case p. 10
4.2.3	Requirements from TS 22.228 p. 11

4.3

Core Network Aspects p. 11

4.4

Protocols and Architecture for IMS-based Telepresence p. 12

4.4.1

Introduction p. 12

4.4.2

Functional Entities p. 12

4.4.2.1	General p. 12
4.4.2.2	User Equipment (UE) p. 13
4.4.2.3	Media Resource Function Controller (MRFC) and Media Resource Function Processor (MFRP) p. 15
4.4.2.4	Conferencing Application Server (Conferencing AS) p. 15

Gap Analysis on Media Handling Aspects of IMS-based Telepresence p. 16

5.1

Media Handling Aspects of CLUE p. 16

5.1.1

Introduction on CLUE p. 16

5.1.2

Media Handling Requirements for TP UE p. 17

5.1.2.1	Data Channel for CLUE Messages p. 17
5.1.2.2	RTP / RTCP Level Requirements p. 17

5.1.3

Guidelines and Examples of SDP and CLUE for Telepresence p. 18

5.1.4

Session Setup and Control Procedures for TP UE p. 19

5.1.5

Gap Analysis p. 19

5.2

GSMA IR.39 IMS Profile for High Definition Video Conference p. 19

5.2.1	Introduction p. 19
5.2.2	Screen Sharing p. 20
5.2.3	Voice Codecs p. 20
5.2.4	Video Codecs p. 21
5.2.5	Gap Analysis p. 21

5.3

Media Handling Aspects of Telepresence from ITU-T SG16 p. 21

5.3.1

Functional Requirements p. 21

5.3.1.1	User Experience p. 21
5.3.1.2	Statistical Information Reporting p. 22
5.3.1.3	Network-Level Aspects p. 22

5.3.2

Audio/Video Parameters p. 22

5.3.2.0

General p. 22

5.3.2.1

Capture-Related Parameters p. 23

5.3.2.1.1	General parameters p. 23
5.3.2.1.2	Visual parameters p. 24
5.3.2.1.3	Audio parameters p. 25
5.3.2.1.4	Delay parameters p. 26
5.3.2.1.5	Multiple Source Capture parameters p. 26

5.3.2.2

Telepresence System Environment parameters p. 27

5.3.3

Gap Analysis p. 27

5.4

MPEG Codecs Relevant for Telepresence p. 27

5.4.1

MPEG-4 AAC-ELD p. 27

5.4.1.1	Introduction p. 27
5.4.1.2	Gap Analysis p. 27

5.4.2

MPEG Video Codecs p. 28

5.4.2.1	Introduction p. 28
5.4.2.2	Gap Analysis p. 28

Conclusion p. 28

6.1	Codecs p. 28
6.2	Media Handling Aspects p. 28

Change history p. 30

TR 26.923 Study on Media Handling aspects of IMS-based Telepresence

full Table of Contents for TR 26.923 Word version: 18.0.0

TR 26.923
Study on Media Handling aspects
of IMS-based Telepresence