1、 ETSI TR 126 969 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); eCall data transfer; In-band modem solution; Characterization report (3GPP TR 26.969 version 14.0.0 Release 14) TECHNICAL REPORT GLOBAL SYSTEM FOR MOBILE
2、 COMMUNICATIONSRETSI ETSI TR 126 969 V14.0.0 (2017-04)13GPP TR 26.969 version 14.0.0 Release 14Reference RTR/TSGS-0426969ve00 Keywords GSM,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Ass
3、ociation but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or pr
4、int versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept
5、on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx
6、 If you find errors in the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying a
7、nd microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All
8、rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered a
9、nd owned by the GSM Association. ETSI ETSI TR 126 969 V14.0.0 (2017-04)23GPP TR 26.969 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is
10、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
11、ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be,
12、 or may become, essential to the present document. Foreword This Technical Report (TR) 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 shou
13、ld 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 “should“, “should not“, “may“, “need not“, “will“,
14、 “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 ETSI TR 126 969 V14.0.0 (2017-04)33GPP TR
15、26.969 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 8g34 Selection tests . 9g34.0 General . 9g34.1 Perfor
16、mance objectives and requirements 9g34.1.1 Test procedures . 10g34.1.2 Test results 11g34.2 Design constraints 12g34.2.1 Test procedures. 12g34.2.2 Test results 12g35 Verification and characterization tests . 13g35.1 Performance with dynamic jitter buffer 13g35.2 Performance with echo cancellation .
17、 16g35.3 Performance with transcoding 16g35.3.1 Performance with ITU-T G.711 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z t
18、he third digit is incremented when editorial only changes have been incorporated in the document. Introduction eCall refers to an interoperable in-vehicle emergency call service which is envisioned to be introduced and operated across Europe in 2014. According to reports from the European Commission
19、, it is foreseen that eCall will be offered on all new vehicles in the EU by 2014. The European Commission has brought together standardization bodies, the automotive industry, mobile telecommunication industry, public emergency authorities and others in the eSafety Forum initiative which has identi
20、fied high-level requirements, recommendations and guidelines for this eCall service 2 and 3. The eSafety Forum has assigned ETSI MSG to standardize those parts of the eCall service that affect the mobile communication system. The development of the eCall standard has been further delegated to the 3r
21、dGeneration Partnership Project (3GPP). ETSI ETSI TR 126 969 V14.0.0 (2017-04)63GPP TR 26.969 version 14.0.0 Release 141 Scope The present document 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-Vehi
22、cle 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 3 and 4, with important additional work produced by ETSI MSG, GSME, 3GPP, and CEN. P
23、revious work in 3GPP TR 22.967 5 “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. eCall provides reliable full-duplex data
24、 communications between IVS and PSAP in addition to emergency voice call (E112) via the cellular network, and can be initiated either automatically or manually 6. The eCall In-band Modem uses the same voice channel as used for the emergency voice call. eCall allows reliable transmission of MSD alter
25、nating with a speech conversation through the existing voice communication paths in cellular mobile phone systems. The expected benefit is that emergency services will be made aware of accidents much more rapidly, will get precise information on location, vehicle type etc. and therefore will be able
26、 to reach accident victims faster, with the potential to save many lives annually. The eCall in-band modems (IVS and PSAP) are fully specified by the General description TS 26.267 9 together with the C-code reference as provided in 3GPP TS 26.268 7. 3GPP TS 26.269 8 deals with the conformance testin
27、g for eCall modem implementations. The present document provides a detailed performance characterization of the eCall in-band modem solution. Results from the 3GPP selection tests as well as verification and characterization tests have been collected into this report. It is impossible to test the eC
28、all modem for all conditions that might arise on the transmission path from the IVS to the PSAP. However, the selected set of test scenarios represents a wide range of conditions that are foreseen to potentially occur in the in-band transmission of eCall data over the radio access and core networks
29、as well as the PSTN. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a speci
30、fic reference, subsequent revisions do not apply. - For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present
31、 document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 eSafety Forum eCall Driving Group: “European Memorandum of Understanding for Realisation of Interoperable In-Vehicle eCall“, May 2004. 3 eSafety Forum: “Clarification Paper EG.2 , High level requirements for a eCall in-vehicle syst
32、em, Supplier perspective“, March 2006, Version 1.0. 4 eSafety Forum: “Recommendations of the DG eCall for the introduction of the pan-European eCall“, April 2006, Version 2.0. 5 3GPP TR 22.967: “Transferring of Emergency Call Data“. 6 3GPP TS 22.101: “Service aspects; Service principles“. 7 3GPP TS
33、26.268: “eCall Data transfer; In-band modem solution; ANSI-C reference code“. ETSI ETSI TR 126 969 V14.0.0 (2017-04)73GPP TR 26.969 version 14.0.0 Release 148 3GPP TS 26.269: “eCall Data Transfer; In-band modem solution; Conformance testing“. 9 3GPP TS 26.267: “eCall Data Transfer; In-band modem sol
34、ution; General description“. 10 3GPP TS 26.226: “Cellular text telephone modem; General description“. 11 3GPP TS 26.230: “Cellular text telephone modem; Transmitter bit exact C-code“. 12 ITU-T Recommendation G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) of Audio F
35、requencies“, 12/90. 13 ITU-T Recommendation G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP)“, 01/07. 14 http:/portal.etsi.org/docbox/zArchive/SMG/SMG11/smg11_sq/HR/ 15 3GPP TS 46.006: “Half-rate speech: ANSI-C code for GSM half-rate
36、speech codec “. 16 http:/portal.etsi.org/docbox/zArchive/SMG/SMG11/smg11_sq/EPx/ 17 3GPP TS 46.053: “ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec“. 18 http:/portal.etsi.org/docbox/zArchive/SMG/SMG11/smg11_amr_nb/ERROR_PATTERNS/ 19 http:/portal.etsi.org/docbox/zArchive/SMG/SMG11/SW_t
37、ool_library/EFR/ 20 3GPP TS 26.114: “IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handling and inter-action“ 21 3GPP TS 46.010: “Full-rate speech; Transcoding“ 22 3GPP TS 46.060: “Enhanced Full Rate (EFR) speech transcoding“. 23 3GPP TS 26.071: “Mandatory speech CODEC speech processing
38、 functions; AMR speech Codec; General description“. 24 3GPP TS 26.171: “Speech codec speech processing functions; Adaptive Multi-Rate - Wideband (AMR-WB) speech codec; General description“. 25 ITU-T Recommendation G.711: “Pulse Code Modulation (PCM) of Voice Frequencies“, 11/88. 26 3GPP TS 26.101: “
39、Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec frame structure“. 27 3GPP TS 26.268: “eCall Data transfer; In-band modem solution; ANSI-C reference code“, Version 8.0.0. 28 3GPP TS 26.267: “eCall Data Transfer; In-band modem solution; General description“,
40、Version 8.0.0. 29 3GPP TS 26.268: “eCall Data transfer; In-band modem solution; ANSI-C reference code“, Version 8.6.0. 30 3GPP TS 26.267: “eCall Data Transfer; In-band modem solution; General description“, Version 8.6.0. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present
41、 document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. ETSI ETSI TR 126 969 V14.0.0 (2017-04)83GPP TR 26.969 version 14.0.0 Release 14eCall: manually or a
42、utomatically initiated emergency call (TS12) from a vehicle, supplemented with a minimum set of emergency related data (MSD), as defined under the EU Commissions eSafety initiative eCall In-band Modem: modem pair (consisting of transmitters and receivers at IVS and PSAP) that operates full-duplex an
43、d allows reliable transmission of eCall Minimum Set of Data from IVS to PSAP via the voice channel of the emergency voice call through cellular and PSTN networks eSafety: European Commission sponsored forum to improve safety aspects of European citizens Figure of Merit (FoM): average MSD transmissio
44、n time for the test campaign used in the eCall selection test, consisting of 26 different test conditions (see Table 1) and 100 tests for each condition. In the wider sense, the Figure of Merit can also include other channel impairments (e.g., noise or transcoding) apart from the speech codec and ch
45、annel errors, but the average is always taken over the 2600 tests mentioned above frame (or: speech frame): time interval equal to 20 ms (corresponding to one AMR or FR speech frame, represented by 160 samples at an 8 kHz sampling rate) Minimum Set of Data (MSD): forming the data component of an eCa
46、ll sent from a vehicle to a Public Safety Answering Point or other designated emergency call centre. The MSD has a maximum size of 140 bytes and includes, for example, vehicle identity, location information and time-stamp MSD data frame: uplink signal transmission interval containing the data of one
47、 MSD (after synchronization has been established) - corresponds to a time interval of 1 080 ms or 8 640 samples (fast modulator) and 2 080 ms or 16 640 samples (robust modulator) assuming an 8 kHz sampling rate modulation frame: symbol transmission time interval equal to 2 ms corresponding to 16 sam
48、ples at 8 kHz sampling rate (fast modulator), or 4 ms corresponding to 32 samples at 8 kHz sampling rate (robust modulator). synchronization frame: signal transmission interval containing synchronization information - corresponds to a time interval of 260 ms or 2 080 samples at an 8 kHz sampling rat
49、e 3.2 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. ACK Acknowledgement ADPCM Adaptive Differential Pulse Code Modulation AGC Automatic Gain Control AoIP A-Interface User Plane over IP AMR Adaptive Multi-Rate (speech codec) AMR-WB AMR Wide-Band (speech codec) AWGN Additive Whi
