ETSI TS 126 114 V13.8.0 (2019-05)

Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 13.8.0 Release 13)

RTS/TSGS-0426114vd80

General Information

• Status: Published
• Publication Date: 02-May-2019
• Technical Committee: 3GPP SA 4 - Codec
• Current Stage: 12 - Completion
• Completion Date: 03-May-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 13.8.0 Release 13)


3GPP TS 26.114 version 13.8.0 Release 13 1 ETSI TS 126 114 V13.8.0 (2019-05)

Reference
RTS/TSGS-0426114vd80
Keywords
LTE,UMTS
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© ETSI 2019.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
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ETSI
3GPP TS 26.114 version 13.8.0 Release 13 2 ETSI TS 126 114 V13.8.0 (2019-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
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 13.8.0 Release 13 3 ETSI TS 126 114 V13.8.0 (2019-05)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 15
Introduction . 15
1 Scope . 16
2 References . 16
3 Definitions and abbreviations . 23
3.1 Definitions . 23
3.2 Abbreviations . 24
4 System description . 26
4.1 System . 26
4.2 Client . 26
4.3 MRFP and MGW . 28
5 Media codecs . 28
5.1 Media components . 28
5.2 Codecs for MTSI clients in terminals . 29
5.2.1 Speech . 29
5.2.1.1 General codec requirements . 29
5.2.1.2 Detailed codec requirements, AMR . 29
5.2.1.3 Detailed codec requirements, AMR-WB . 29
5.2.1.4 Detailed codec requirements, EVS . 30
5.2.1.5 Offering multiple audio bandwidths and multiple channels . 30
5.2.1.6 Codec preference order . 30
5.2.2 Video . 30
5.2.3 Real-time text . 32
6 Media configuration . 32
6.1 General . 32
6.2 Session setup procedures . 33
6.2.1 General . 33
6.2.1a RTP profile negotiation . 33
6.2.1a.1 General . 33
6.2.1a.2 Using SDPCapNeg in SDP offer . 33
6.2.1a.3 Answering to an SDP offer using SDPCapNeg . 34
6.2.2 Speech . 34
6.2.2.1 General . 34
6.2.2.2 Generating SDP offers . 35
6.2.2.3 Generating SDP answer . 38
6.2.3 Video . 46
6.2.3.1 Introduction . 46
6.2.3.2 Common Session Setup Procedures . 47
6.2.3.3 Coordination of Video Orientation (CVO) . 48
6.2.3.4 Video Region-of-Interest (ROI) . 48
6.2.3.5 RTP Retransmission . 51
6.2.3.6 Forward Error Correction (FEC) . 51
6.2.4 Text . 51
6.2.5 Bandwidth negotiation . 52
6.2.5.1 General . 52
6.2.5.2 Speech . 53
6.2.5.3 Video . 55
6.2.6 The Synchronization Info attribute "3gpp_sync_info" . 56
6.2.7 Negotiated QoS parameters . 57
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6.2.7.1 General . 57
6.2.7.2 Alignment of negotiated QoS parameters and b=AS bandwidth modifier . 57
6.2.7.3 Alignment of negotiated QoS parameters and a=bw-info attribute . 58
6.3 Session control procedures . 58
7 Data transport . 59
7.1 General . 59
7.2 RTP profiles . 59
7.3 RTCP usage . 59
7.3.1 General . 59
7.3.2 Speech . 60
7.3.3 Video . 61
7.3.4 Real-time text . 62
7.3.5 Void . 62
7.3.6 Reduced-Size RTCP . 62
7.3.7 Video Region-of-Interest (ROI) Signaling . 63
7.4 RTP payload formats for MTSI clients . 65
7.4.1 General . 65
7.4.2 Speech . 66
7.4.3 Video . 67
7.4.4 Real-time text . 67
7.4.5 Coordination of Video Orientation . 67
7.4.6 RTP Retransmission . 70
7.4.7 Forward Error Correction (FEC) . 70
7.5 Media flow . 70
7.5.1 General . 70
7.5.2 Media specific . 70
7.5.2.1 Speech . 70
7.5.2.1.1 General . 70
7.5.2.1.2 Default operation . 70
7.5.2.1.2.1 General . 70
7.5.2.1.2.2 Codec Mode Requests. 71
7.5.2.1.2.3 Frame aggregation and redundancy . 71
7.5.2.1.3 HSPA . 71
7.5.2.1.4 EGPRS. 71
7.5.2.1.5 GIP . 72
7.5.2.1.6 Initial codec mode for AMR and AMR-WB . 72
7.5.2.1.7 E-UTRAN . 72
7.5.2.1.8 Initial codec mode for EVS . 73
7.5.2.1.9 Dual-mono . 73
7.5.2.2 Video . 73
7.5.2.3 Text . 73
7.5.3 Media synchronization . 73
7.5.3.1 General . 73
7.5.3.2 Text . 74
7.5.4 ECN usage in RTP sessions . 74
7.5.5 Handling of bit-rate variations . 74
7.5.5.1 General . 74
7.5.5.2 Video . 74
7.5.5.3 Speech . 75
8 Jitter buffer management in MTSI clients in terminals . 75
8.1 General . 75
8.2 Speech . 75
8.2.1 Terminology . 75
8.2.2 Functional requirements for jitter-buffer management . 76
8.2.3 Minimum performance requirements for jitter-buffer management . 76
8.2.3.1 General . 76
8.2.3.2 Objective performance requirements . 77
8.2.3.2.1 General . 77
8.2.3.2.2 Jitter buffer delay criteria . 77
8.2.3.2.3 Jitter induced concealment operations . 78
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8.2.3.3 Delay and error profiles . 79
8.2.3.4 Speech material for JBM minimum performance evaluation . 79
8.3 Video . 79
8.4 Text . 79
9 Packet-loss handling . 80
9.1 General . 80
9.2 Speech . 80
9.2.1 General . 80
9.2.2 Transmitting redundant frames . 80
9.2.3 Receiving redundant frames . 83
9.3 Video . 84
9.3.1 General . 84
9.3.2 Receiver behaviour . 84
9.3.3 Sender behaviour . 84
9.3.4 Recommendations for packet loss recovery mechanisms usage . 85
9.4 Text . 85
10 Adaptation . 86
10.1 General . 86
10.2 Speech . 86
10.2.0 General . 86
10.2.1 RTCP-APP with codec control requests . 87
10.2.1.1 General . 87
10.2.1.2 General Format of RTCP-APP packet with codec control requests . 88
10.2.1.2a Padding . 89
10.2.1.3 Redundancy Request . 89
10.2.1.4 Frame Aggregation Request . 89
10.2.1.5 Codec Mode Request . 90
10.2.1.6 Generation of RTP payloads for multiple codec control requests . 91
10.2.1.7 EVS Primary Rate Request . 92
10.2.1.8 EVS Bandwidth Request . 93
10.2.1.9 EVS Channel Aware Request . 93
10.2.1.10 EVS Primary mode to EVS AMR-WB IO mode Switching Request . 94
10.2.1.11 EVS AMR-WB IO mode to EVS Primary mode Switching Request . 95
10.2.2 Example use cases . 95
10.2.3 SDP negotiation for RTCP-APP . 97
10.3 Video . 99
10.3.1 General . 99
10.3.2 Signaling mechanisms . 99
10.3.3 Adaptation triggers . 100
10.3.4 Sender behavior, downswitching . 100
10.3.4.1 Downswitching divided into phases . 100
10.3.4.2 Rate reduction phase . 101
10.3.4.3 Delay recovery phase . 102
10.3.5 Sender behavior, up-switching. 102
10.3.6 Receiver behavior, down-switching . 102
10.3.7 Receiver behavior, up-switch. 102
10.3.8 ECN triggered adaptation . 102
10.4 Text . 103
10.5 Explicit Congestion Notification . 104
10.6 Using the a=bw-info attribute for adaptation . 104
11 Front-end handling . 104
11.1 General . 104
12 Inter-working . 105
12.1 General . 105
12.2 3G-324M . 106
12.2.1 General . 106
12.2.2 Codec usage . 106
12.2.2.1 General . 106
12.2.2.2 Text . 106
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12.2.3 Payload format . 106
12.2.4 MTSI media gateway trans-packetization . 106
12.2.4.1 General . 106
12.2.4.2 Speech de-jitter buffer . 106
12.2.4.3 Video bitrate equalization . 106
12.2.4.4 Data loss detection . 107
12.2.4.5 Data integrity indication . 107
12.2.4.6 Packet size considerations . 107
12.2.4.6.0 General . 107
12.2.4.6.1 The Maximum Receive SDU Size attribute “3gpp_MaxRecvSDUSize” . 107
12.2.4.7 Setting RTP timestamps . 108
12.2.4.8 Protocol termination . 108
12.2.4.9 Media synchronization . 108
12.2.5 Session control . 108
12.3 GERAN/UTRAN CS inter-working . 108
12.3.0 3G-324M . 109
12.3.1 Codecs for MTSI media gateways . 109
12.3.1.1 Speech interworking between 3GPP PS access and CS GERAN/UTRAN. 109
12.3.1.1a Speech inter-working between fixed access and CS GERAN/UTRAN . 110
12.3.1.2 Text . 110
12.3.2 RTP payload formats for MTSI media gateways . 110
12.3.2.1 Speech . 110
12.3.2.2 Text . 111
12.3.3 Explicit Congestion Notification . 111
12.3.4 Codec switching procedures with SRVCC . 112
12.4 PSTN . 112
12.4.1 3G-324M . 112
12.4.2 Text . 112
12.5 GIP inter-working. 113
12.5.1 Text . 113
12.5.2 Speech . 113
12.6 Void . 113
12.6.1 Void . 113
12.6.2 Void . 113
12.7 Inter-working with other IMS and non-IMS IP networks . 113
12.7.1 General . 113
12.7.2 Speech . 113
12.7.2.1 General . 113
12.7.2.2 Speech codecs and formats . 114
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 . 114
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 . 114
12.7.2.2.3 Common procedures . 114
12.7.2.3 Codec preference order for session negotiation . 115
12.7.2.4 RTP profiles . 115
12.7.2.5 RTP payload formats. 115
12.7.2.6 Packetization . 115
12.7.2.7 RTCP usage and adaptation . 116
12.7.2.8 RTP usage . 117
12.7.2.9 Session setup and session modification. 117
12.7.2.10 Audio level alignment . 117
12.7.3 Explicit Congestion Notification . 117
12.7.4 Text . 118
12.7.5 Inter-working IPv4 and IPv6 networks . 118
13 Void . 118
13a Media types, codecs and formats used for MSRP transport . 118
13a.1 General . 118
13a.2 Difference relative to 3GPP TS 26.141 . 119
13a.2.1 Video . 119
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14 Supplementary services . 119
14.1 General . 119
14.2 Media formats and transport . 119
14.3 Media handling in hold procedures . 119
15 Network preference management object . 119
15.1 General . 119
15.2 Nodes Definition . 120
15.3 Example Configuration of 3GPP MTSINP MO . 132
16 Quality of Experience . 134
16.1 General . 134
16.2 Metrics Definition . 134
16.2.1 Corruption duration metric . 134
16.2.2 Successive loss of RTP packets . 135
16.2.3 Frame rate . 135
16.2.4 Jitter duration . 135
16.2.5 Sync loss duration . 136
16.2.6 Round-trip time .
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