1、 ETSI TR 126 969 V15.0.0 (2018-07) 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 15.0.0 Release 15) TECHNICAL REPORT GLOBAL SYSTEM FOR MOBILE
2、 COMMUNICATIONSRETSI ETSI TR 126 969 V15.0.0 (2018-07)13GPP TR 26.969 version 15.0.0 Release 15Reference RTR/TSGS-0426969vf00 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
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9、egistered and owned by the GSM Association. ETSI ETSI TR 126 969 V15.0.0 (2018-07)23GPP TR 26.969 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to th
10、ese essential IPRs, if any, is 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. Lates
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13、of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Report (TR) has been produ
14、ced 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 should be interpreted as being references to the corresponding ETSI deliverables. The cross reference bet
15、ween 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“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting
16、 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 V15.0.0 (2018-07)33GPP TR 26.969 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs te
17、rminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 8g34 Selection tests . 9g34.0 General . 9g34.1 Performance objectives and requirements 9g34.1.1 Test procedures . 10g34.1.2 Test results 11g34.2 Design co
18、nstraints 11g34.2.1 Test procedures. 12g34.2.2 Test results 12g35 Verification and characterization tests . 12g35.1 Performance with dynamic jitter buffer 13g35.2 Performance with echo cancellation . 15g35.3 Performance with transcoding 16g35.3.1 Performance with ITU-T G.711 2 presented to TSG for a
19、pproval; 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 the third digit is incremented when editorial only changes have been incorporated in the document. Int
20、roduction 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, it is foreseen that eCall will be offered on all new vehicles in the EU by 2014. The European Commi
21、ssion has brought together standardization bodies, the automotive industry, mobile telecommunication industry, public emergency authorities and others in the eSafety Forum initiative which has identified high-level requirements, recommendations and guidelines for this eCall service 2 and 3. The eSaf
22、ety 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 3rdGeneration Partnership Project (3GPP). ETSI ETSI TR 126 969 V15.0.0 (2018-07)63GPP TR 26.969 version
23、 15.0.0 Release 151 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-Vehicle System (IVS) to the Public Safety Answering Point (PSAP) via the voice channel of cellular and PS
24、TN 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. Previous work in 3GPP TR 22.967 5 “Transfer of Emergency Call Data“, examined the issues associated wi
25、th 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 communications between IVS and PSAP in addition to emergency voice call (E112) via the cellular netw
26、ork, 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 alternating with a speech conversation through the existing voice communication paths in cellular mobile p
27、hone 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 to reach accident victims faster, with the potential to save many lives annually. The eCall in-band
28、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 testing for eCall modem implementations. The present document provides a detailed performance characterizat
29、ion 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 eCall modem for all conditions that might arise on the transmission path from the IVS to the PSAP. Howe
30、ver, 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 as well as the PSTN. 2 References The following documents contain provisions which, through reference
31、 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 specific reference, subsequent revisions do not apply. - For a non-specific reference, the latest version
32、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 document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 eSafety Forum eCall Driving Grou
33、p: “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 system, Supplier perspective“, March 2006, Version 1.0. 4 eSafety Forum: “Recommendations of the DG eCall
34、 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 26.268: “eCall Data transfer; In-band modem solution; ANSI-C reference code“. 8 3GPP TS 26.269: “eCal
35、l Data Transfer; In-band modem solution; Conformance testing“. ETSI ETSI TR 126 969 V15.0.0 (2018-07)73GPP TR 26.969 version 15.0.0 Release 159 3GPP TS 26.267: “eCall Data Transfer; In-band modem solution; General description“. 10 3GPP TS 26.226: “Cellular text telephone modem; General description“.
36、 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 Frequencies“, 12/90. 13 ITU-T Recommendation G.729: “Coding of speech at 8 kbit/s using conjugate-stru
37、cture 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 speech codec “. 16 http:/portal.etsi.org/docbox/zArchive/SMG/SMG11/smg11_sq/EPx/ 17 3GPP TS 46.053: “
38、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_tool_library/EFR/ 20 3GPP TS 26.114: “IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handl
39、ing 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 functions; AMR speech Codec; General description“. 24 3GPP TS 26.171: “Speech codec speech processin
40、g 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: “Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec frame stru
41、cture“. 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“, Version 8.0.0. 29 3GPP TS 26.268: “eCall Data transfer; In-band modem solution; ANSI-C reference code
42、“, 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 document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in
43、the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. eCall: manually or automatically 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
44、 ETSI ETSI TR 126 969 V15.0.0 (2018-07)83GPP TR 26.969 version 15.0.0 Release 15eCall In-band Modem: modem pair (consisting of transmitters and receivers at IVS and PSAP) that operates full-duplex and allows reliable transmission of eCall Minimum Set of Data from IVS to PSAP via the voice channel of
45、 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 transmission time for the test campaign used in the eCall selection test, consisting of 26 different test condit
46、ions (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 channel errors, but the average is always taken over the 2600 tests mentioned above frame (or: speech f
47、rame): 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 eCall sent from a vehicle to a Public Safety Answering Point or other designated emergency call centre.
48、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 MSD (after synchronization has been established) - corresponds to a time interval of 1 080 ms or 8 6
49、40 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 samples 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 samp
