ETSI TS 144 035-2016 Digital cellular telecommunications system (Phase 2+) Location Services (LCS) Broadcast network assistance for Enhanced Observed Time Difference (E-OTD) and Gl.pdf

1、 ETSI TS 1Digital cellular telecoLocatBroadcast network assDifference (E-OTD) anpos(3GPP TS 44.0TECHNICAL SPECIFICATION144 035 V13.0.0 (2016communications system (Phacation Services (LCS); ssistance for Enhanced Obseand Global Positioning Systeositioning methods .035 version 13.0.0 Release 13GLOBAL

2、SYSTEMOBILE COMMUN16-01) hase 2+); served Time tem (GPS) 13) TEM FOR ICATIONSRETSI ETSI TS 144 035 V13.0.0 (2016-01)13GPP TS 44.035 version 13.0.0 Release 13Reference RTS/TSGG-0244035vd00 Keywords GSM ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +3

3、3 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association 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

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9、M and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 144 035 V13.0.0 (2016-01)23GPP TS 44.035 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

10、pertaining to these 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 Se

11、cretariat. Latest updates are available on the 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 update

12、s on the ETSI Web server) which are, or 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 ide

13、ntities, UMTS identities or GSM identities. 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 docum

14、ent “shall“, “shall not“, “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 Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except w

15、hen used in direct citation. ETSI ETSI TS 144 035 V13.0.0 (2016-01)33GPP TS 44.035 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviat

16、ions . 6g34 Broadcast Message Contents 6g34.1 E-OTD Assistance Data Broadcast Message 6g34.1.1 E-OTD Assistance Data Broadcast Message Content. 7g34.1.1.1 Message Structure Definition IE . 8g34.1.1.2 Reference Time IE 11g34.1.1.3 Ciphering Serial Number IE 11g34.1.1.4 Time Slot Scheme IE 11g34.1.1.5

17、 Neighbour Bitmap Definition IE . 12g34.1.1.6 Sectored Channels Definition IE . 12g34.1.1.7 Sectored Channels BTS ID Definition IE . 12g34.1.1.8 Sectored BTS Sync/Async Definition IE 13g34.1.1.9 Multiframe Offset Values IE . 13g34.1.1.10 BCC Definition IE 13g34.1.1.11 RTD Drift Factor Values IE 14g3

18、4.1.1.12 Channel RTD Values IE 15g34.1.1.13 Serving Cell Location IE . 16g34.1.1.14 Relative Neighbour Location IE . 16g34.2 GPS Assistance Data Broadcast Message 18g34.2.1 GPS Assistance Data Content . 18g34.2.1.1 DGPS Correction Data 19g34.2.1.1.1 GSM Time Present IE . 20g34.2.1.1.2 BTS Clock Drif

19、t Present IE . 20g34.2.1.1.3 BTS Clock Drift IE 20g34.2.1.1.4 Reference Location IE . 20g34.2.1.1.5 Reference Time IE . 20g34.2.1.1.6 Status/Health IE. 21g34.2.1.1.7 N_SAT IE 21g34.2.1.1.8 DGPS Corrections IE 21g34.2.1.2 Ephemeris and Clock Correction Data 22g34.2.1.3 Almanac and Other Data . 24g3An

20、nex A (informative): Overview of Broadcast Assistance for E-OTD and GPS 26g3A.1 General . 26g3A.2 E-OTD Assistance Broadcast . 26g3A.3 GPS Assistance Broadcast 27g3A.4 Impact on Other Services . 28g3Annex B (informative): Example of E-OTD Assistance Data Broadcast Message . 29g3Annex C (informative)

21、: Example of GPS Assistance Data Broadcast Message 33g3Annex D (informative): Change History 34g3History 35 ETSI ETSI TS 144 035 V13.0.0 (2016-01)43GPP TS 44.035 version 13.0.0 Release 13Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The pres

22、ent document defines the contents of LCS assistance data broadcast messages from the Serving Mobile Location Centre (SMLC) and the Mobile Station (MS). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modi

23、fy the contents of the present document, it will be re-released by the TSG with an identifying change of release date 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

24、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. ETSI ETSI TS 144 035 V13.0.0 (2016-01)5

25、3GPP TS 44.035 version 13.0.0 Release 131 Scope The present document contains the content of messages necessary for support of MS Based location service operation on the mobile radio interface layer 3. 2 References The following documents contain provisions which, through reference in this text, con

26、stitute 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 applies. In the case of

27、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 Void. 3 Void. 4 Void. 5 Void“ 6 3GPP TS 23.041: “Technic

28、al realization of Cell Broadcast Service (CBS)“. 7 Void. 8 Void. 9 Void. 10 Void. 11 Void. 12 Void. 13 Void. 14 Void. 15 RTCM-SC104: “RTCM Recommended Standards for Differential GNSS Service (v.2.2)“. 16 ICD-GPS-200: “Navstar GPS Space Segment / Navigation User Interfaces“. ETSI ETSI TS 144 035 V13.

29、0.0 (2016-01)63GPP TS 44.035 version 13.0.0 Release 133 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: E-OTD Assistance Data Message: contains the RTD and BTS coordinates of the neighbours that should be used in E-OT

30、D measurements. This E-OTD Assistance Data is broadcasted using CBCH channel using SMSCB DRX service. The reception of this broadcast message enables MS to calculate its own location. GPS Assistance Data Message: contains GPS differential corrections. The reception of this broadcast message enables

31、MS to have calculate more accurate location estimate. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 apply. 4 Broadcast Message Contents This clause describes the LCS Assistance Data messages to be broadcasted in SMSCB messages content part over

32、 CBCH channel using SMSCB DRX service. The rules and contets are described so that SMLC is able to construct the message as well as MS is able to process the received message. The E-OTD Assistance Data message contains RTD and BTS coordinate information and GPS Assistance Data contains GPS Different

33、ial Correction data, Emphemeris and Clock Correction Data and Almanac and Other Data. 4.1 E-OTD Assistance Data Broadcast Message The E-OTD Assistance Data message contents are defined in this clause. The E-OTD Assistance Data message is built so that it has always a fixed length and some of the inf

34、ormation elements are scalable according to the amount of neighbours and the amount of sectored channels. The information elements are in the order which is described in subclause 4.1.1 and no spare bits are allowed between elements. The MSB bits of the information elements are presented always firs

35、t and if boundary of the octet divides the information element then the LSB part of the information element continues in the LSB part of the next octet (figure 1). Example of E-OTD Assistance Data Broadcast Message is in annex B. The channel to broadcast the E-OTD Assistance Data message is CBCH ove

36、r which the SMSCB DRX service is used. One SMSCB message has fixed information data length of 82 octets and the purpose is always to use the whole fixed length message capacity for the message. MS can identify the LCS SMSCB message with E-OTD Message Identifier declared in 3GPP TS 23.041. ETSI ETSI

37、TS 144 035 V13.0.0 (2016-01)73GPP TS 44.035 version 13.0.0 Release 13MSB LSBInformation Element Containing 26 bitsOctet nOctet n+1Octet n+2Broadcast Message7 6 5 4 3 2 1 0Octet n+3Octet n+47 6 5 4 3 2 1 07 6 5 4 3 2 1 01 0MSB Next IENext IE LSB .Octet n+57 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1

38、 0 1 0Figure 1: Information element bit mapping to the broadcast message 4.1.1 E-OTD Assistance Data Broadcast Message Content The Broadcast Assistance Data is a point-to-multipoint message from the GSM Network to the MSs. This message gives assistance data to the MS for performing E-OTD measurement

39、s and calculating its own position. It contains the following information elements. The information elements are always in the order described in table 1. The ciphered part of message is end of message and indicated with grey shading in table 1. Table 1: E-OTD Assistance Data Broadcast Message Conte

40、nt Information element Type/Reference Presence Message Structure Definition Message Structure Definition 4.1.1.1 M Reference Time Reference Time 4.1.1.2 M Ciphering Serial Number Ciphering Serial Number 4.1.1.3 C Time Slot Scheme Time Slot Scheme 4.1.1.4 M Neighbour Bitmap Definition Neighbour Bitma

41、pDefinition 4.1.1.5 C Sectored Channels Definition Sectored Channels Definition 4.1.1.6 C Sectored Channels BTS ID Definition Sectored Channels BTS ID Definition 4.1.1.7 C Sectored BTS Sync/Async Definition Sectored BTS Sync/Async Definition 4.1.1.8 C 51 Multiframe Offset Values 51 Multiframe Offset

42、 Values 4.1.1.9 M BCC Definition BCC Definition 4.1.1.10 M RTD Drift Factor Values RTD Drift Factor Values 4.1.1.11 C Channel RTD Values Channel RTD Values 4.1.1.12 C Serving Cell Location Serving Cell Location 4.1.1.13 M Relative Neighbour Location Values Relative Neighbour Location Values 4.1.1.14

43、 M ETSI ETSI TS 144 035 V13.0.0 (2016-01)83GPP TS 44.035 version 13.0.0 Release 134.1.1.1 Message Structure Definition IE This IE contains the definition of this broadcast message. The length of this IE is 19 bits and it is mandatory. This IE contains the following bits. Table 2: Message Structure D

44、efinition Bit Bit order in field Definition 1 LSB MSB Neighbour List Map (bits 2-0) 2 3 4 LSB MSB Accuracy Range (bits 2-0) 5 6 7 Ciphering Key Flag 8 Cipher On/Off9 Sector Ind 10 RTD Range 11 LSB MSB RTD Accuracy (bits 1-0) 12 13 RTD Drift Factors Present 14 RTDs Present 15 LSB MSB Number of Neighb

45、ours (bits 4-0) 16 17 18 19 The first three octets upto bit 3 in octet 3 in the broadcast messages content part containing the Message Structure Definition IE look always as follows. 8 7 6 5 4 3 2 1 Cipher On/Off Cipher-ing Key Flag Accuracy Range (bits 2-0) Neighbour List Map (bits 2-0) Octet1 Numb

46、er of Neighbours (bits 4-3) RTDs Present RTD Drift Factors Present RTD Accuracy (bits 1-0) RTD Range Sector Ind Octet2 (Next IE) Number of Neighbours (bits 2-0) Octet3 The definitions of each structure item is declared below: Neighbour List Map These bits define in which order the neighbours in the

47、System Information Neighbour List (max 32 neighbours) are reported with the broadcast message. - The Neighbour List Map will also affect the amount of bits that can be used for Relative Neighbour Location Value definitions. - This Broadcast Assistance Data message is always referring to the neighbou

48、r BTSs included in the System Information Neighbour List which is received in idle state from BCCH. The E-OTD broadcast message does not allow the possibility for delivering assistance data for other BTSs (outside the the System Information Neighbour List. ETSI ETSI TS 144 035 V13.0.0 (2016-01)93GPP

49、 TS 44.035 version 13.0.0 Release 13Table 3: Neighbour List Map 2 1 0 Definition 0 0 0 All Neigbours from neighbour list 0 0 1 Even Neighbours from neighbour list 0 1 0 Odd Neighbours from neighbour list 0 1 1 1stand the MS uses this to correct the pseudorange it measures at t1 using ephemeris IODE-2, PRm(t1, IODE-2), by: PR(t1, IODE2) = PRm(t1, IODE2) + PRC(t1, IODE2). If there is not an ephemeris set for a currently visible satellit