1、 ETSI TS 126 267 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); eCall data transfer; In-band modem solution; General description (3GPP TS 26.267 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOB
2、ILE COMMUNICATIONSRETSI ETSI TS 126 267 V14.0.0 (2017-04)13GPP TS 26.267 version 14.0.0 Release 14Reference RTS/TSGS-0426267ve00 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
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9、d and owned by the GSM Association. ETSI ETSI TS 126 267 V14.0.0 (2017-04)23GPP TS 26.267 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,
10、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. Latest updates are available on t
11、he 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
12、be, or may become, essential to the present document. Foreword This Technical Specification (TS) 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.
13、These should 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 “shall“, “shall not“, “should“, “should
14、not“, “may“, “need not“, “will“, “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 TS 12
15、6 267 V14.0.0 (2017-04)33GPP TS 26.267 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 . 7g34 General overview
16、 . 8g34.1 eCall system overview 8g34.2 eCall system requirements 9g34.3 eCall in-band modem architecture 10g34.3.1 Principle operation of the IVS data modem 11g34.3.2 Principle operation of the PSAP data modem . 11g35 Functional description of the IVS data modem 12g35.1 IVS transmitter . 12g35.1.1 M
17、SD Message . 12g35.1.2 CRC code 13g35.1.3 HARQ FEC encoder . 13g35.1.3.1 Bit scrambling . 13g35.1.3.2 Turbo Coding 13g35.1.3.3 HARQ for MSD messages 14g35.1.4 Modulation 15g35.1.5 MSD data frame format 16g35.1.6 Synchronization signal and frame format . 16g35.1.7 Multiplexing . 17g35.1.8 Uplink sign
18、al and retransmission 18g35.1.9 Additional signal format for push mode . 18g35.2 IVS receiver 18g35.2.1 Synchronization detector/tracker 19g35.2.2 Timing Unit 20g35.2.3 De-multiplexing 20g35.2.4 Data demodulation and FEC decoding . 20g35.2.5 Message handler . 20g36 Functional description of the PSAP
19、 data modem . 21g36.1 PSAP transmitter 21g36.1.1 Message encoding . 21g36.1.2 BCH encoding 21g36.1.3 Modulation 22g36.1.4 Downlink signal 22g36.1.4.1 Link-layer feedback messages 22g36.1.4.2 Higher-layer acknowledgement messages 23g36.1.4.3 Handling of downlink messages . 23g36.1.5 Synchronization 2
20、3g36.1.6 Multiplexing . 24g36.2 PSAP receiver 24g36.2.1 Synchronization detector/tracker 24g36.2.2 Timing Unit 24g36.2.3 De-multiplexer 25g36.2.4 Data demodulator 25g3ETSI ETSI TS 126 267 V14.0.0 (2017-04)43GPP TS 26.267 version 14.0.0 Release 146.2.5 HARQ FEC decoder . 25g36.2.6 CRC handling . 25g3
21、6.2.7 Push mode - push message detector . 25g37 Transmission protocol and error handling 26g37.1 Normal operation 26g37.2 Abnormal operation 26g37.3 PSAP and IVS protocol state models . 29g3Annex A (informative): eCall Performance Requirements/Objectives and Design Constraints. 32g3A.1 Definitions 3
22、2g3A.2 Performance Requirements 32g3A.3 Performance Objectives . 34g3A.4 Design Constraints . 35g3Annex B (informative): Change history . 36g3History 37g3ETSI ETSI TS 126 267 V14.0.0 (2017-04)53GPP TS 26.267 version 14.0.0 Release 14Foreword The present document has been produced by the 3rdGeneratio
23、n Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and
24、an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 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 enh
25、ancements, corrections, updates, etc. z the 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. Accordin
26、g 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 Commission has brought together standardization bodies, the automotive industry, mobile telecommunication industry, public emergency authorities and others in the
27、eSafety Forum initiative which has identified high-level requirements, recommendations and guidelines for this eCall service 9 and 10. 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 sta
28、ndard has been further delegated to the 3rdGeneration Partnership Project (3GPP). ETSI ETSI TS 126 267 V14.0.0 (2017-04)63GPP TS 26.267 version 14.0.0 Release 141 Scope The present document specifies the eCall In-band Modem, which is used for reliable transmission of the eCall Minimum Set of Data (M
29、SD) 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 10 and 11, with important additional work produced by ETSI MSG, G
30、SME, 3GPP, and CEN. Previous work in 3GPP TR 22.967 3 “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 reli
31、able full-duplex data communications between IVS and PSAP in addition to emergency voice call (E112) via the cellular network, and can be initiated either automatically or manually 1. The eCall In-band Modem uses the same voice channel as used for the emergency voice call. eCall allows reliable tran
32、smission of MSD alternating 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 t
33、herefore will be able to reach accident victims faster, with the potential to save many lives annually. The eCall in-band modem solution described here exceeds the eCall requirements (see Annex A) by means of a combination of innovations in data modulation scheme, synchronization, forward error corr
34、ection coding, hybrid ARQ (HARQ) and incremental redundancy transmission. The present document provides a general overview and algorithm description of the eCall in-band modems, including IVS modem and PSAP modem, to form the complete full-duplex transmission. The eCall in-band modems (IVS and PSAP)
35、 are fully specified by this TS together with the C-code reference as provided in 3GPP TS 26.268 2. 3GPP TS 26.269 13 deals with the conformance testing for eCall modem implementations, and 3GPP TR 26.969 14 contains a characterization report of the in-band modem. 2 References The following document
36、s 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 specific reference, subsequent revisions do not apply. For a non-
37、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 document. 1 3GPP TS 22.101: “Service aspects; Service princip
38、les“. 2 3GPP TS 26.268: “eCall Data Transfer; In-band modem solution; ANSI-C reference code“. 3 3GPP TR 22.967: “Transfer of Emergency Call Data“. 4 3GPP TR 26.967: “eCall Data Transfer; In-band modem solution“. 5 3GPP TS 46.001: “Full rate speech; Processing functions“. 6 3GPP TS 46.032: “Full rate
39、 speech; Voice Activity Detection (VAD) for full rate speech traffic channels“. 7 3GPP TS 26.071: “AMR speech Codec; General description“. ETSI ETSI TS 126 267 V14.0.0 (2017-04)73GPP TS 26.267 version 14.0.0 Release 148 3GPP TS 26.094: “Mandatory speech codec speech processing functions; Adaptive Mu
40、lti-Rate (AMR) speech codec; Voice Activity Detector (VAD)“. 9 eSafety Forum eCall Driving Group, “European Memorandum of Understanding for Realisation of Interoperable In-Vehicle eCall“, May 2004. 10 eSafety Forum, “Clarification Paper EG.2 , High level requirements for a eCall in-vehicle system, S
41、upplier perspective“, March 2006, Version 1.0. 11 eSafety Forum, “Recommendations of the DG eCall for the introduction of the pan-European eCall“, April 2006, Version 2.0. 12 3GPP TS 26.226: “Cellular text telephone modem; General description“. 13 3GPP TS 26.269: “eCall Data Transfer; In-band modem
42、solution; Conformance testing“. 14 3GPP TR 26.969 “ eCall Data Transfer; In-band modem solution; Characterization report“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: eCall: A manually or automatically initiated
43、 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 and allows reliable tra
44、nsmission 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. feedback frame: Downlink signal transmission interval containing
45、feedback data - corresponds to a time interval of 140 ms or 1 120 samples at an 8 kHz sampling rate. 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). MSD: The Minimum Set of Data forming the da
46、ta component of an eCall 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 con
47、taining the data of one MSD (after synchronization has been established) - corresponds to a time interval of 1320 ms or 10560 samples (fast modulator) and 2 320 ms or 18560 samples (robust modulator) assuming an 8 kHz sampling rate. modulation frame: Symbol transmission time interval equal to 2 ms c
48、orresponding 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
49、 an 8 kHz sampling rate. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply. ACK ACKnowledgement AMR Adaptive Multi-Rate (speech codec) BCH Bose-Chaudhuri-Hocquenghem (Code)BP Band Pass ETSI ETSI TS 126 267 V14.0.0 (2017-04)83GPP TS 26.267 version 14.0.0 Release 14CRC Cyclic Redundancy Check CTM Cellular Text telephone Modem eIM eCall In-band Modem EU European Union FEC Forward Error Correction FR Full Rate (speech codec) GSM Global System for Mobile communications HARQ Hybrid Au
