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Content for  TR 26.969  Word version:  18.0.0

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2 References  3 Definitions and abbreviations  4 Selection tests  5 Verification and characterization tests  A eCall test setup  B Required transmission times for IVS initiated eCall signalling and HL-ACK  C Extended simulation results  D Additional Performance Indicators  $ Change history 

 

2  References  p. 6

3  Definitions and abbreviations  p. 7

3.1  Definitions  p. 7

3.2  Abbreviations  p. 8

4  Selection tests  p. 9

4.0  General  p. 9

4.1  Performance objectives and requirements  p. 9

4.1.1  Test procedures  p. 10

4.1.2  Test results  p. 11

4.2  Design constraints  p. 12

4.2.1  Test procedures  p. 12

4.2.2  Test results  p. 12

5  Verification and characterization tests  p. 13

5.1  Performance with dynamic jitter buffer  p. 13

5.2  Performance with echo cancellation  p. 15

5.3  Performance with transcoding  p. 16

5.3.1  Performance with ITU-T G.711&G.726 transcoding  p. 17

5.3.2  Performance with ITU-T G.729 A/B transcoding  p. 18

5.4  Performance with packet loss concealment techniques  p. 18

5.5  Performance with other codec types  p. 21

5.5.1  GSM HR  p. 21

5.5.2  GSM EFR  p. 21

5.5.3  HR AMR  p. 23

5.5.4  AMR-WB  p. 24

5.6  Performance with additional channel conditions  p. 26

5.6.1  Different C/I  p. 26

5.6.2  AGC variations  p. 27

5.7  Varying channel conditions  p. 28

5.7.1  Description of test setup  p. 28

5.7.2  Test results  p. 29

5.8  Performance with static jitter buffer  p. 29

5.8.1  Simulation Methodology  p. 31

5.8.2  Jitter buffer with ITU-T G.711 A-law speech frames  p. 32

5.8.3  Jitter buffer with ITU-T G.729 speech frames  p. 32

5.9  Noisy conditions  p. 32

5.10  Erroneous tone detection  p. 34

5.11  Gaps in transmission due to handovers  p. 34

5.12  Change of speech codec  p. 36

5.12.1  Change of AMR codec modes  p. 36

5.12.2  Change of speech codec in handover  p. 37

5.13  Sample slip / small delay variations at handover  p. 38

5.14  Combinations of test conditions  p. 38

5.14.1  GSM HR and HR AMR with transcoding (G.729 / G.726) under different channel conditions  p. 38

5.14.2  CSoHS with transcoding (G.729a / G.711) and echo cancellation  p. 39

A  eCall test setup  p. 40

A.1  Measurement of the MSD transmission time  p. 42

B  Required transmission times for IVS initiated eCall signalling and HL-ACK  p. 45

C  Extended simulation results  p. 46

C.1  Dynamic jitter buffer  p. 46

C.2  Transcoding  p. 52

C.3  Sample slip  p. 55

C.4  CSoHS with transcoding (G.729a / G.711) and echo cancellation  p. 61

D  Additional Performance Indicators  p. 66

$  Change history  p. 75

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