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TR 26.969 (SA4)
eCall data transfer –
In-band modem solution –
Characterization report

ToC   3GPP‑Page   ETSI‑search   Help    
V15.0.0 (PDF)2018/06  78 p.
V14.0.0  2017/03  77 p.
V13.0.0  2015/09  77 p.
V12.0.0  2014/09  67 p.
V11.0.0  2012/09  67 p.
V10.0.0  2011/04  67 p.
V9.1.0  2011/04  67 p.
V8.2.0  2011/04  65 p.

Rapporteur:  Mr. Leung, Nikolai
See also:  eCall-related TS/TR

This TR characterizes the performance of the eCall In-band Modem, which is used for reliable transmission of the eCall Minimum Set of Data (MSD) from an In-Vehicle System (IVS) to the Public Safety Answering Point (PSAP) via the voice channel of cellular and PSTN networks.

The European Union eCall requirements, recommendations and guidelines were developed by eSafety Forum, with important additional work produced by ETSI MSG, GSME, 3GPP, and CEN.

Previous work in TR 22.967 "Transfer of Emergency Call Data", examined the issues associated with the transmission of emergency call data from a vehicle to a PSAP. This analysis identified that the preferred option be based on an in-band modem solution.


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1  ScopePDF-p. 6
2  References
3  Definitions and abbreviationsPDF-p. 7
4  Selection testsPDF-p. 9
5  Verification and characterization testsPDF-p. 13
5.1  Performance with dynamic jitter buffer
5.2  Performance with echo cancellationPDF-p. 15
5.3  Performance with transcodingPDF-p. 16
5.4  Performance with packet loss concealment techniques
5.5  Performance with other codec typesPDF-p. 21Up
5.6  Performance with additional channel conditionsPDF-p. 26
5.7  Varying channel conditionsPDF-p. 28
5.8  Performance with static jitter bufferPDF-p. 29
5.9  Noisy conditions
5.10  Erroneous tone detectionPDF-p. 34
5.11  Gaps in transmission due to handovers
5.12  Change of speech codecPDF-p. 36
5.13  Sample slip / small delay variations at handoverPDF-p. 38
5.14  Combinations of test conditions
A  eCall test setupPDF-p. 40
B  Required transmission times for IVS initiated eCall signalling and HL-ACKPDF-p. 45
C  Extended simulation resultsPDF-p. 46
D  Additional Performance IndicatorsPDF-p. 66
E  Change historyPDF-p. 75

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