ETSI TS 126 114 V12.17.0 (2019-10)

Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 12.17.0 Release 12)

RTS/TSGS-0426114vch0

General Information

• Status: Published
• Publication Date: 09-Oct-2019
• Technical Committee: 3GPP SA 4 - Codec
• Current Stage: 12 - Completion
• Completion Date: 10-Oct-2019

Standards Content (Sample)

TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
IP Multimedia Subsystem (IMS);
Multimedia telephony;
Media handling and interaction
(3GPP TS 26.114 version 12.17.0 Release 12)


3GPP TS 26.114 version 12.17.0 Release 12 1 ETSI TS 126 114 V12.17.0 (2019-10)

Reference
RTS/TSGS-0426114vch0
Keywords
LTE,UMTS
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ETSI
3GPP TS 26.114 version 12.17.0 Release 12 2 ETSI TS 126 114 V12.17.0 (2019-10)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
3GPP TS 26.114 version 12.17.0 Release 12 3 ETSI TS 126 114 V12.17.0 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 13
Introduction . 13
1 Scope . 14
2 References . 14
3 Definitions and abbreviations . 20
3.1 Definitions . 20
3.2 Abbreviations . 21
4 System description . 22
4.1 System . 22
4.2 Client . 23
4.3 MRFP and MGW . 25
5 Media codecs . 25
5.1 Media components . 25
5.2 Codecs for MTSI clients in terminals . 26
5.2.1 Speech . 26
5.2.1.1 General codec requirements . 26
5.2.1.2 Detailed codec requirements, AMR . 26
5.2.1.3 Detailed codec requirements, AMR-WB . 26
5.2.1.4 Detailed codec requirements, EVS . 27
5.2.1.5 Offering multiple audio bandwidths and multiple channels . 27
5.2.1.6 Codec preference order . 27
5.2.2 Video . 27
5.2.3 Real-time text . 29
6 Media configuration . 29
6.1 General . 29
6.2 Session setup procedures . 30
6.2.1 General . 30
6.2.1a RTP profile negotiation . 30
6.2.1a.1 General . 30
6.2.1a.2 Using SDPCapNeg in SDP offer . 30
6.2.1a.3 Answering to an SDP offer using SDPCapNeg . 31
6.2.2 Speech . 31
6.2.2.1 General . 31
6.2.2.2 Generating SDP offers . 32
6.2.2.3 Generating SDP answer . 35
6.2.3 Video . 43
6.2.4 Text . 45
6.2.5 Bandwidth negotiation . 45
6.2.5.1 General . 45
6.2.5.2 Speech . 46
6.2.6 The Synchronization Info attribute "3gpp_sync_info" . 47
6.2.7 Negotiated QoS parameters . 48
6.3 Session control procedures . 49
7 Data transport . 49
7.1 General . 49
7.2 RTP profiles . 50
7.3 RTCP usage . 50
7.3.1 General . 50
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7.3.2 Speech . 51
7.3.3 Video . 52
7.3.4 Real-time text . 53
7.3.5 Void . 53
7.3.6 Reduced-Size RTCP . 53
7.4 RTP payload formats for MTSI clients . 54
7.4.1 General . 54
7.4.2 Speech . 54
7.4.3 Video . 55
7.4.4 Real-time text . 55
7.4.5 Coordination of Video Orientation . 56
7.5 Media flow . 58
7.5.1 General . 58
7.5.2 Media specific . 58
7.5.2.1 Speech . 58
7.5.2.1.1 General . 58
7.5.2.1.2 Default operation . 58
7.5.2.1.3 HSPA . 59
7.5.2.1.4 EGPRS. 59
7.5.2.1.5 GIP . 59
7.5.2.1.6 Initial codec mode for AMR and AMR-WB . 59
7.5.2.1.7 E-UTRAN . 60
7.5.2.1.8 Initial codec mode for EVS . 60
7.5.2.1.9 Dual-mono . 60
7.5.2.2 Video . 61
7.5.2.3 Text . 61
7.5.3 Media synchronization . 61
7.5.3.1 General . 61
7.5.3.2 Text . 61
7.5.4 ECN usage in RTP sessions . 61
8 Jitter buffer management in MTSI clients in terminals . 62
8.1 General . 62
8.2 Speech . 62
8.2.1 Terminology . 62
8.2.2 Functional requirements for jitter-buffer management . 63
8.2.3 Minimum performance requirements for jitter-buffer management . 63
8.2.3.1 General . 63
8.2.3.2 Objective performance requirements . 64
8.2.3.2.1 General . 64
8.2.3.2.2 Jitter buffer delay criteria . 64
8.2.3.2.3 Jitter induced concealment operations . 65
8.2.3.3 Delay and error profiles . 66
8.2.3.4 Speech material for JBM minimum performance evaluation . 66
8.3 Video . 66
8.4 Text . 66
9 Packet-loss handling . 67
9.1 General . 67
9.2 Speech . 67
9.2.1 General . 67
9.2.2 Transmitting redundant frames . 67
9.2.3 Receiving redundant frames . 70
9.3 Video . 71
9.3.1 General . 71
9.3.2 Receiver behaviour . 71
9.3.3 Sender behaviour . 71
9.4 Text . 71
10 Adaptation . 72
10.1 General . 72
10.2 Speech . 72
10.2.0 General . 72
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10.2.1 RTCP-APP with codec control requests . 73
10.2.1.1 General . 73
10.2.1.2 General Format of RTCP-APP packet with codec control requests . 74
10.2.1.2a Padding . 75
10.2.1.3 Redundancy Request . 75
10.2.1.4 Frame Aggregation Request . 75
10.2.1.5 Codec Mode Request . 76
10.2.1.6 Generation of RTP payloads for multiple codec control requests . 77
10.2.1.7 EVS Primary Rate Request . 78
10.2.1.8 EVS Bandwidth Request . 79
10.2.1.9 EVS Channel Aware Request . 79
10.2.1.10 EVS Primary mode to EVS AMR-WB IO mode Switching Request . 80
10.2.1.11 EVS AMR-WB IO mode to EVS Primary mode Switching Request . 81
10.2.2 Example use cases . 81
10.2.3 SDP negotiation for RTCP-APP . 83
10.3 Video . 85
10.3.1 General . 85
10.3.2 Signaling mechanisms . 85
10.3.3 Adaptation triggers . 86
10.3.4 Sender behavior, downswitching . 86
10.3.4.1 Downswitching divided into phases . 86
10.3.4.2 Rate reduction phase . 87
10.3.4.3 Delay recovery phase . 88
10.3.5 Sender behavior, up-switching. 88
10.3.6 Receiver behavior, down-switching . 88
10.3.7 Receiver behavior, up-switch. 88
10.3.8 ECN triggered adaptation . 88
10.4 Text . 89
10.5 Explicit Congestion Notification . 90
11 Front-end handling . 90
11.1 General . 90
12 Inter-working . 91
12.1 General . 91
12.2 3G-324M . 92
12.2.1 General . 92
12.2.2 Codec usage . 92
12.2.2.1 General . 92
12.2.2.2 Text . 92
12.2.3 Payload format . 92
12.2.4 MTSI media gateway trans-packetization . 92
12.2.4.1 General . 92
12.2.4.2 Speech de-jitter buffer . 92
12.2.4.3 Video bitrate equalization . 92
12.2.4.4 Data loss detection . 93
12.2.4.5 Data integrity indication . 93
12.2.4.6 Packet size considerations . 93
12.2.4.6.0 General . 93
12.2.4.6.1 The Maximum Receive SDU Size attribute “3gpp_MaxRecvSDUSize” . 93
12.2.4.7 Setting RTP timestamps . 94
12.2.4.8 Protocol termination . 94
12.2.4.9 Media synchronization . 94
12.2.5 Session control . 94
12.3 GERAN/UTRAN CS inter-working . 95
12.3.0 3G-324M . 95
12.3.1 Codecs for MTSI media gateways . 95
12.3.1.1 Speech interworking between 3GPP PS access and CS GERAN/UTRAN. 95
12.3.1.1a Speech inter-working between fixed access and CS GERAN/UTRAN . 96
12.3.1.2 Text . 96
12.3.2 RTP payload formats for MTSI media gateways . 96
12.3.2.1 Speech . 96
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12.3.2.2 Text . 97
12.3.3 Explicit Congestion Notification . 98
12.3.4 Codec switching procedures with SRVCC . 98
12.4 PSTN . 98
12.4.1 3G-324M . 98
12.4.2 Text . 98
12.5 GIP inter-working. 99
12.5.1 Text . 99
12.5.2 Speech . 99
12.6 Void . 99
12.6.1 Void . 99
12.6.2 Void . 99
12.7 Inter-working with other IMS and non-IMS IP networks . 99
12.7.1 General . 99
12.7.2 Speech . 100
12.7.2.1 General . 100
12.7.2.2 Speech codecs and formats . 100
12.7.2.2.1 MTSI MGW for interworking between MTSI client in terminal using 3GPP access and other
IMS or non-IMS IP networks . 100
12.7.2.2.2 MTSI MGW for interworking between MTSI client in terminal using fixed access and other

IMS or non-IMS IP networks . 100
12.7.2.2.3 Common procedures . 101
12.7.2.3 Codec preference order for session negotiation . 101
12.7.2.4 RTP profiles . 101
12.7.2.5 RTP payload formats. 101
12.7.2.6 Packetization . 102
12.7.2.7 RTCP usage and adaptation . 102
12.7.2.8 RTP usage . 103
12.7.2.9 Session setup and session modification. 103
12.7.2.10 Audio level alignment . 103
12.7.3 Explicit Congestion Notification . 104
12.7.4 Text . 104
12.7.5 Inter-working IPv4 and IPv6 networks . 104
13 Void . 104
13a Media types, codecs and formats used for MSRP transport . 105
13a.1 General . 105
13a.2 Difference relative to 3GPP TS 26.141 . 105
13a.2.1 Video . 105
14 Supplementary services . 105
14.1 General . 105
14.2 Media formats and transport . 105
14.3 Media handling in hold procedures . 106
15 Network preference management object . 106
15.1 General . 106
15.2 Nodes Definition . 106
15.3 Example Configuration of 3GPP MTSINP MO . 118
16 Quality of Experience . 120
16.1 General . 120
16.2 Metrics Definition . 120
16.2.1 Corruption duration metric . 120
16.2.2 Successive loss of RTP packets . 121
16.2.3 Frame rate . 121
16.2.4 Jitter duration . 121
16.2.4 Sync loss duration . 121
16.2.5 Round-trip time . 122
16.2.6 Average codec bitrate . 122
16.2.7 Codec information . 122
16.3 Metric Configuration . 123
16.3.1 QoE metrics reporting management object . 123
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16.3.2 QoE metric reporting configuration . 127
16.3.3 QoE reporting rule definition . 128
16.4 Metrics Reporting . 129
16.4.1 XML schema for QoE report message . 130
16.4.2 Example XML for QoE report message . 131
17 Management of Media Adaptation . 131
17.1 General . 131
17.2 Media adaptation management object . 132
17.3 Management procedures . 153
17.3.1 Management of speech adaptation . 154
17.3.2 Management of video adaptation . 155
18 MTSI client in terminal using fixed access . 157
18.1 General . 157
18.2 Media codecs . 158
18.2.1 General . 158
18.2.2 Speech . 158
18.2.2.1 Speech codecs .
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