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Content for
TR 26.959
Word version: 18.0.0
0…
2…
2
References
3
Definitions and abbreviations
4
Overview
5
Parameters for SRVCC Handover Thresholds
6
Codec Mode Adaptation Procedures
7
Adaptation Capability Indication
8
Impact of JBM and PLC on Handover Thresholds
9
Conclusions
A
Informal Objective and Subjective Experiments for Obtaining Max. PLR Operating Points with and without Application Layer Redundancy
$
Change history
2
References
p. 6
3
Definitions and abbreviations
p. 7
3.1
Definitions
p. 7
3.2
Abbreviations
p. 7
4
Overview
p. 7
4.1
Introduction
p. 7
4.2
UE-based and Network-based Architectures
p. 7
4.2.1
Network-based Architecture
p. 7
4.2.2
UE-based Architecture
p. 8
5
Parameters for SRVCC Handover Thresholds
p. 8
5.1
Description
p. 8
5.2
Potential Solutions
p. 9
5.2.1
Robustness Indication
p. 9
5.2.1.1
Maximum Packet Loss Rate (PLR)
p. 9
5.2.1.1.1
General
p. 9
5.2.1.1.2
Max PLR recommendation without Application Layer Redundancy
p. 9
5.2.1.1.3
Max PLR recommendation with Application Layer Redundancy
p. 9
5.3
Conclusion
p. 11
6
Codec Mode Adaptation Procedures
p. 11
6.1
Description
p. 11
6.2
Potential Solutions
p. 11
6.2.1
Adaptation to Packet Loss
p. 11
6.3
Conclusion
p. 11
7
Adaptation Capability Indication
p. 11
7.1
Description
p. 11
7.2
Potential Solutions
p. 12
7.2.1
SDP Indication
p. 12
7.2.2
Application Layer Redundancy Adaptation Request
p. 13
7.2.2.1
General
p. 13
7.2.2.2
Signal method 1: RTCP-APP
p. 13
7.2.2.3
Signal method 2: RTP CMR using the Reserved CMR codepoints
p. 13
7.2.2.4
Signal method 3: Padding
p. 15
7.2.2.5
Signal method 4: RTP header extension
p. 15
7.2.2.6
Conclusions on Application Layer Redundancy
|R16|
p. 16
7.2.3
Considerations on the impact of packet loss on adaptation requests
p. 16
7.3
Conclusion
p. 16
8
Impact of JBM and PLC on Handover Thresholds
p. 17
8.1
Description
p. 17
8.2
Potential Solutions
p. 17
8.2.1
General
p. 17
8.2.2
UE-requested UL and DL PLR
p. 18
8.2.2.1
General
p. 18
8.2.2.2
Simple Ratio
p. 18
8.2.2.3
SDP-Negotiated
p. 19
8.2.2.4
Dynamic Allocation of UL PLR and DL PLR
p. 20
8.2.3
Network-requested UL and DL PLR
p. 30
8.2.3.1
General
p. 30
8.2.3.2
Simple Ratio
p. 30
8.2.3.3
SDP-Negotiated
p. 31
8.2.3.4
PCRF-Negotiated
p. 31
8.2.3.5
PCRF-Negotiated using single SDP parameter
p. 32
8.2.3.6
Dynamic Allocation of UL PLR and DL PLR
p. 32
8.3
Conclusion
p. 32
9
Conclusions
p. 33
A
Informal Objective and Subjective Experiments for Obtaining Max. PLR Operating Points with and without Application Layer Redundancy
p. 35
$
Change history
p. 38