ETSI TS 126 267-2016 Digital cellular telecommunications system (Phase 2+) Universal Mobile Telecommunications System (UMTS) eCall data transfer In-band modem solution General desc.pdf

1、 ETSI TS 1Digital cellular telecoUniversal Mobile TeleCIn-banGe(3GPP TS 26.2TECHNICAL SPECIFICATION126 267 V13.0.0 (2016communications system (Phaelecommunications System (eCall data transfer; and modem solution; General description .267 version 13.0.0 Release 13GLOBAL SYSTEMOBILE COMMUN16-01) hase

2、2+); (UMTS); 13) TEM FOR ICATIONSRETSI ETSI TS 126 267 V13.0.0 (2016-01)13GPP TS 26.267 version 13.0.0 Release 13Reference RTS/TSGS-0426267vd00 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 348 623 562 000

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9、stered and owned by the GSM Association. ETSI ETSI TS 126 267 V13.0.0 (2016-01)23GPP TS 26.267 version 13.0.0 Release 13Intellectual 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

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12、 may 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 identit

13、ies. 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“, “sh

14、ould 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

15、TS 126 267 V13.0.0 (2016-01)33GPP TS 26.267 version 13.0.0 Release 13Contents 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 ove

16、rview . 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.

17、1.1 MSD 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

18、 signal 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

19、 PSAP 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 Synchronizat

20、ion 23g36.1.6 Multiplexing . 24g36.2 PSAP receiver 24g36.2.1 Synchronization detector/tracker 24g36.2.2 Timing Unit 24g36.2.3 De-multiplexer 25g3ETSI ETSI TS 126 267 V13.0.0 (2016-01)43GPP TS 26.267 version 13.0.0 Release 136.2.4 Data demodulator 25g36.2.5 HARQ FEC decoder . 25g36.2.6 CRC handling .

21、 25g36.2.7 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 Definiti

22、ons 32g3A.2 Performance Requirements 32g3A.3 Performance Objectives . 34g3A.4 Design Constraints . 35g3Annex B (informative): Change history . 36g3History 37g3ETSI ETSI TS 126 267 V13.0.0 (2016-01)53GPP TS 26.267 version 13.0.0 Release 13Foreword The present document has been produced by the 3rdGene

23、ration 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

24、 and 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. technica

25、l enhancements, 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. Acc

26、ording 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

27、 the 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 eCal

28、l standard has been further delegated to the 3rdGeneration Partnership Project (3GPP). ETSI ETSI TS 126 267 V13.0.0 (2016-01)63GPP TS 26.267 version 13.0.0 Release 131 Scope The present document specifies the eCall In-band Modem, which is used for reliable transmission of the eCall Minimum Set of Da

29、ta (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 10 and 11, with important additional work produced by ETSI M

30、SG, GSME, 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

31、 reliable 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

32、 transmission 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.

33、and therefore 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

34、 correction 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

35、PSAP) 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 doc

36、uments 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

37、 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 document. 1 3GPP TS 22.101: “Service aspects; Service pr

38、inciples“. 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

39、 rate speech; Voice Activity Detection (VAD) for full rate speech traffic channels“. ETSI ETSI TS 126 267 V13.0.0 (2016-01)73GPP TS 26.267 version 13.0.0 Release 137 3GPP TS 26.071: “AMR speech Codec; General description“. 8 3GPP TS 26.094: “Mandatory speech codec speech processing functions; Adapti

40、ve Multi-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 syst

41、em, Supplier 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 m

42、odem 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 init

43、iated emergency call (TS12) from a vehicle, supplemented with a minimum set of emergency related data (MSD), as defined under the EU Commission“s eSafety initiative. eCall In-band Modem: Modem pair (consisting of transmitters and receivers at IVS and PSAP) that operates full-duplex and allows reliab

44、le 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. feedback frame: Downlink signal transmission interval conta

45、ining 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

46、the data 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 interv

47、al containing 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

48、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 samp

49、les at 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) ETSI ETSI TS 126 267 V13.0.0 (2016-01)83GPP TS 26.267 version 13.0.0 Release 13BCH Bose-Chaudhuri-Hocquenghem (Code) BP Band Pass CRC 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 Hyb