1、ETSI TS I01 528 V8.4.1 (2002-05) Technical Specificafion Digital cellular telecommunications system (Phase 2+); Location Services (LCS); Broadcast network assistance for Enhanced Observed Time Difference (E-OTD) and Global Positioning System (GPS) positioning methods (3GPP TS 04.35 version 8.4.1 Rel
2、ease 1999) 3GPP TS 04.35 version 8.4.1 Release 1999 1 ETSI TS 101 528 V8.4.1 (2002-05) Reference RTS/TSGG-020435841 Keywords GSM ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but n
3、on lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .arq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived d
4、ifference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be awar
5、e 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 ha p:/pa rta I. etsi I a rgltbistat uslstatus .as p If you find errors in the present document, send your comment to: Cori vriaht Notifica tion No pa
6、rt may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benef
7、it of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 2 ETSI TS
8、 101 528 V8.4.1 (2002-05) Intellectual 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 publicly available for ETSI members and non-members, and can be found in ETSI SR O00 3
9、14: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). Pursuant to the ETSI IPR Policy, no investigation, including IPR se
10、arches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates 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 pro
11、duced 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 b
12、etween GSM, UMTS, 3GPP and ETSI identities can be found under www.etsi.ornkey . ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 3 ETSI TS 101 528 V8.4.1 (2002-05) Contents Intellectual Property Rights 2 Foreword . 2 Foreword . 4 1 Scope 5 2 References 5 3 Definitions. abbreviations and symbols . 5 3.1
13、 Definitions 5 3.2 Abbreviations 6 4 Broadcast Message Contents 6 4.1 4.1.1 4.1.1.1 4.1.1.2 4.1.1.3 4.1.1.4 4.1.1.5 4.1.1.6 4.1.1.7 4.1.1.8 4.1.1.9 4.1.1.10 4.1.1.1 1 4.1.1.12 4.1.1.13 4.1.1.14 4.2 4.2.1 4.2.1.1 4.2.1.1.1 4.2.1.1.2 4.2.1.1.3 4.2.1.1.4 4.2.1.1.5 4.2.1.1.6 4.2.1.1.7 4.2.1.1.8 4.2.1.2
14、4.2.1.3 E-OTD Assistance Data Broadcast Message 6 E-OTD Assistance Data Broadcast Message Content . 7 Message Structure Definition IE . 8 Reference Time IE 11 Ciphering Serial Number IE 11 Time Slot Scheme IE 11 Neighbour Bitmap Definition IE . 12 Sectored Channels Definition IE . 12 Sectored Channe
15、ls BTS ID Definition IE . 12 Sectored BTS Sync/Async Definition IE 13 Multifiame Offset Values IE . 13 BCC Definition IE 14 RTD DriR Factor Values IE 14 Channel RTD Values IE 16 Serving Cell Location IE 17 17 19 GPS Assistance Data Content 19 DGPS Correction Dat 20 GSM Time Present 21 BTS Clock Drif
16、t Pr 21 BTS Clock Drift IE 21 Reference Location IE 21 Reference Time IE 21 StatudHealth IE 22 22 DGPS Corrections IE 22 Ephemeris and Clock Correction Data 23 Almanac and Other Data . 25 GPS Assistance Data Broadcast Messa Annex A (informative): Overview of Broadcast Assistance for E-OTD and GPS 27
17、 A . 1 General . 27 A.2 E-OTD Assistance Broadcast . 27 A.3 GPS Assistance Broadcast 28 A.4 Impact on Other Services . 28 Annex B (informative): Example of E-OTD Assistance Data Broadcast Message . 30 Annex C (informative): Example of GPS Assistance Data Broadcast Message 34 Annex D (informative): C
18、hange history . 35 History 36 ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 4 ETSI TS 101 528 V8.4.1 (2002-05) Foreword This Technical Specification has been produced by the 3d Generation Partnership Project (3GPP). The present document defines the contents of LCS assistance data broadcast messages
19、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 modiSl the contents of the present document, it will be re-released by the TSG w
20、ith an identiSling 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 approved document under change control. y the second digit is incremented fo
21、r 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 3GPP TS 04.35 version 8.4.1 Release 1999 5 ETSI TS 101 528 V8.4.1 (2002-05) 1 Scope The present document conta
22、ins the content of messages necessary for support of MS Based location service operation on the mobile radio interface layer 3. 2 Re fe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either speci
23、fic (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 a reference to a 3GPP document (including a GSM document), a non-specif
24、ic reference implicitly refers to the latest version of that document in the same Release as theyresent document. il 21 Void. 31 Void. 41 Void. 51 Void“ 61 71 Void. SI Void. 91 Void. lo1 Void. i 11 Void. 3GPP TS O 1.04: “Abbreviations and acronyms“. 3GPP TS 03.41: “Technical Realization of Short Mes
25、sage Service Cell Broadcast (SMSCB)“ 121 Void. i31 Void. i41 Void. i51 161 RTCM-SC104, RTCM Recommended Standards for Differential GNSS Service (v.2.2). ICD-GPS-200, Navstar GPS Space Segment / Navigation User Interfaces. 3 Definitions, abbreviations and symbols 3.1 De fi nit ions For the purposes o
26、f the present document, the following terms and definitions apply. ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 6 ETSI TS 101 528 V8.4.1 (2002-05) 7 E-OTD Assistance Data Message: E-OTD Assistance Data contains the RTD and BTS coordinates of the neighbours that should be used in E-OTD measurements.
27、 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: GPS Assistance Data Message contains GPS differential corrections. The reception of this broadcast mes
28、sage enables MS to have calculate more accurate location estimate. 6543 21 O7 6543 21 O7 6543 21 O1 O 3.2 Abbreviations Abbreviations used in the present document are listed in 3GPP TS 01.04 i. 4 Broadcast Message Contents This clause describes the LCS Assistance Data messages to be broadcasted in S
29、MSCB messages content part over 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 Assista
30、nce Data contains GPS Differential 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 f
31、ixed length and some of the information 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 section 4.1.1 and no spare bits are allowed between elements. The MSB bits of the information eleme
32、nts are presented always first 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 Assist
33、ance Data message is CBCH over 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 identiSl the LCS SMSCB message with E-OTD Message Identifier declared
34、in 3GPP TS 03.41. c: Broadcast Messaae I I Octet n+4 I I I Octet n+5 I Figure 1: Information element bit mapping to the broadcast message ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 7 ETSI TS 101 528 V8.4.1 (2002-05) Information element Message Structure Definition Reference Time Ciphering Serial
35、Number Time Slot Scheme Neighbour Bitmap Definition Sectored Channels Definition Sectored Channels BTS ID Defin ition Defin ition 51 Multiframe Offset Values Sectored BTS SyncIAsync 4.1.1 E-OTD Assistance Data Broadcast Message Content TypelReference Presence Message Structure M Definition 4.1 .I .I
36、 Reference Time 4.1 .I .2 Number4.1.1.3 Time Slot M Scheme 4.1 .I .4 BitmapDefinition 4.1 .I .5 Sectored Channels C Definition 4.1 .I .6 Sectored Channels BTS C ID Definition 4.1.1.7 Sectored BTS C SyncIAsync Definition 4.1 .I .8 51 Multiframe Offset M M Ciphering Serial C Neighbour C The Broadcast
37、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 measurements and calculating its own position. It contains the following information elements. The information elements are always in the order describe
38、d 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 Content ETSI 3GPP TS 04.35 version 8.4.1 Release 1999 8 3 4 ETSI TS 101 528 V8.4.1 (2002-05) MSB LSB 4.1 .I .I Message Structure Definition IE Th
39、is IE contains the definition of this broadcast message. The length of tlis IE is 19 bits and it is mandatory. This IE contains the following bits: Cipher Cipher- Accuracy Range Neighbour List Map On10ff ingKey (bits 2-0) (bits 2-0) Flag Number of RTDs RTD RTD Accuracy RTD Sector Neighbours Present
40、Drift (bits 1-0) Range I nd (bits 4-3) Factors Present (Next IE) I Number of Neighbours (bits 2-0) Table 2: Message Structure Definition Odet1 Octet2 Octet3 Definition Bit order I Bit 1 infield 1 I Lm I Neighbour List Map (bits 2-0) I 151 I Accuracy Range (bits 2-0) I RTD Accuracy (bits 1-0) :ey Fla
41、g I O dnlOff 9 Sector Ind 10 RTD Range 11 LSB MSB 12 11 I I I u3 r lesent I Number of Neighbours (bits 4-0) The definitions of each structure item is declared below: Neighbour List Map These bits define in which order the neighbours in the System Information Neighbour List (max 32 neighbours) are re
42、ported 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 neighbour BTSs included in the System Information Neighbour List which i
43、s 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 3GPP TS 04.35 version 8.4.1 Release 1999 9 ETSI TS 101 528 V8.4.1 (2002-05) 2 O Table 3: Neighbour Lis
44、t Map 1 O Definition O O All Neigbours from neighbour list O O O O 1 Even Neighbours from neighbour list 1 O Odd Neighbours from neighbour list 1 1 Ist & Ist + n*3 2nd & 2“+n*3 I O O Neighbour Bitmap Definition I O O 5 km O 1 10 km 11 11 11 Spare I 1 1 - All Neighbours means all the neighbours from
45、System Information Neighbour list (max 32 neighbours) are reported in this broadcast message (1 broadcast message) O 1 45 km 1 O 60 km - Even/Odd neighbours from neighbour list means the even/odd list entries in the System Information Neighbour List are reported in this broadcast message (two broadc
46、ast messages needed) - lSt & l“+n*3 means that l“, 4th, 7th, loth,. ,31st (max 11 neighbours) will be reported in this broadcast message (1/3 of total broadcast) - 2“d & 2nd+n*3 means that 2“d, 5th, Sth, 1 lth, . . . , 32“d (max 1 1 neighbours) will be reported in this broadcast message (2/3 of tota
47、l broadcast) - 3d & 3d+n*3 means that 3rd, 6th, 9th, 12th, . . ., 30th (max 10 neighbours) will be reported in this broadcast message (3/3 of total broadcast) The lst & lst+n*3, 2“d & 2nd+n*3 and 3d & 3d+n*3 means total 3 broadcast messages - Neighbour Bitmap Definition will define which neighbours
48、are included into this broadcast message, see section 4.1.1.5. Accuracy Range The accuracy range declares the accuracy of the values in the Relative Neigbour Location Value IE. The accuracy range has the following information: Table 4: Accuracy Range 1211101 Definition 1111111 120 km For example if
49、there are 15 bits (1 sign bit and 14 value bits) reserved for Relative Neighbour North or East Value and the accuracy range is defined to be 20 km, then resolution of Relative Neighbour North or East Value is 0.6 m. Ciphering Key Flag The MS gets two (2) deciphering keys always with location update, a deciphering key that is time stamped to be current one and deciphering key that time stamped to be next one. Thus the MS has always two deciphering keys in memory. With this Ciphering Key Flag in this broadcast message the MS knows whether to use currenthext d
