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TR 26.969SA4
eCall Data Transfer –
In-Band Modem solution –
Characterization report

use "3GPP‑Page" to get the Word version
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for a better overview, the Table of Contents (ToC) is reproduced
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

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.

full Table of Contents for  TR 26.969  Word version:   15.0.0

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1  ScopeWord-p. 6
2  References
3  Definitions and abbreviationsWord-p. 7
4  Selection testsWord-p. 9
5  Verification and characterization testsWord-p. 13
5.1  Performance with dynamic jitter buffer
5.2  Performance with echo cancellationWord-p. 15
5.3  Performance with transcodingWord-p. 16
5.4  Performance with packet loss concealment techniques
5.5  Performance with other codec typesWord-p. 21
5.6  Performance with additional channel conditionsWord-p. 26
5.7  Varying channel conditionsWord-p. 28
5.8  Performance with static jitter buffer
5.9  Noisy conditions
5.10  Erroneous tone detectionWord-p. 34
5.11  Gaps in transmission due to handovers
5.12  Change of speech codecWord-p. 36
5.13  Sample slip / small delay variations at handoverWord-p. 38
5.14  Combinations of test conditions
A  eCall test setupWord-p. 40
B  Required transmission times for IVS initiated eCall signalling and HL-ACKWord-p. 45
C  Extended simulation resultsWord-p. 46
D  Additional Performance IndicatorsWord-p. 66
E  Change historyWord-p. 75

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