1、 ETSI TS 100 392-18-2 V1.1.1 (2008-11)Technical Specification Terrestrial Trunked Radio (TETRA);Voice plus Data (V+D) and Direct Mode Operation (DMO);Part 18: Air interface optimized applications;Sub-part 2: Net Assist Protocol (NAP)ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 2Reference DTS/TETRA-031
2、58 Keywords TETRA, V+D, location, air interface 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 Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice
3、 Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable D
4、ocument 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 aware that the document may be subject to revision or change of status. Information on t
5、he current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be r
6、eproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2008. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks o
7、f ETSI registered 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 ETSI TS 100 392-18-2 V1.1.1 (2008-11) 3Contents Intellectual Property Rights 5g3Foreword . 5g31 Scope 6g32 References 6g32.1 Normat
8、ive references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Net Assist Protocol . 8g34.1 General . 8g34.2 Location information protocol system architecture 8g34.3 Net assist protocol service description . 9g34.3.1 General on serv
9、ices . 9g34.3.2 Services available at the NAP-SAP 9g34.3.3 Service primitives at the NAP-SAP 9g34.3.4 Service primitive parameters at the NAP-SAP . 10g34.3.5 State description 10g35 Net assist protocol description . 10g35.1 Description of information elements 10g35.1.1 General on network assistance
10、information elements . 10g35.2 Information flows . 10g35.2.1 General on information flows . 10g35.2.2 MS receiving network assistance 11g35.2.3 MS receiving network assistance and sending response . 11g35.2.4 MS requesting network assistance 11g35.2.5 MS requesting network assistance and receiving a
11、 reject . 12g35.2.6 Allocation of entities . 12g35.3 Procedures 12g35.3.1 General on procedures 12g35.3.2 Service availability . 12g35.3.3 Rejection of request for assistance 13g35.3.4 Routing net assistance to specific terminal groups . 13g35.3.5 GPS Ephemeris assistance 13g35.3.6 GPS Almanac assis
12、tance . 13g35.3.7 GPS Ionosphere and UTC correction assistance . 14g35.3.8 GPS Time assistance . 14g35.3.9 Location assistance . 14g36 Net assist protocol coding requirements. 14g36.1 General on coding requirements . 14g36.2 Net assist protocol PDU description tables 15g36.2.1 NET ASSIST DEMAND PDU
13、. 15g36.2.2 NET ASSIST PROVIDE PDU . 15g36.2.3 NET ASSIST PROVIDE ACK PDU 16g36.2.4 NET ASSIST REJECT PDU 16g36.3 Net assist protocol PDU information elements 16g36.3.1 Acknowledgement request 16g36.3.2 Angle 16g36.3.3 Confidence level . 17g36.3.4 GPS Almanac data 17g36.3.5 GPS Almanac reference wee
14、k extended . 17g36.3.6 GPS Ephemeris and clock data . 18g36.3.7 GPS Ionosphere and UTC correction data 18g3ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 46.3.8 GPS time estimate . 18g36.3.9 Half of major axis . 18g36.3.10 Half of minor axis . 18g36.3.11 Horizontal position uncertainty. 19g36.3.12 LA .
15、19g36.3.13 Latitude . 19g36.3.14 Location altitude . 19g36.3.15 Location altitude uncertainty 20g36.3.16 Location circle 20g36.3.17 Location circle with altitude . 21g36.3.18 Location circle with altitude and uncertainty 21g36.3.19 Location data 21g36.3.20 Location ellipse . 22g36.3.21 Location elli
16、pse with altitude 22g36.3.22 Location ellipse with altitude and uncertainty 22g36.3.23 Location shape 23g36.3.24 Longitude 23g36.3.25 MNI 23g36.3.26 Net assist group address 23g36.3.27 Net assist type . 24g36.3.28 Number of net assist types 24g36.3.29 PDU type 25g36.3.30 Reject code 25g36.3.31 Rejec
17、t retry interval 26g36.3.32 Result code 26g36.3.33 Satellite id . 26g36.3.34 Type 5 element identifier 27g36.4 Type 5 information element description . 27g36.4.1 Type 5 information element definition . 27g36.4.2 Type 5 element length . 28g36.4.3 Type 5 element length extension 28g36.4.4 Type 5 infor
18、mation element 28g3History 29g3ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 5Intellectual 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 a
19、nd 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 the ETSI Web server (http:/webapp.etsi.or
20、g/IPR/home.asp). 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 be, or may become, essenti
21、al to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Terrestrial Trunked Radio (TETRA). The present document is part 18, sub-part 2 of a multi-part deliverable covering the Voice plus Data (V+D), as identified below: EN 300 392-1: “Gene
22、ral network design“; EN 300 392-2: “Air Interface (AI)“; EN 300 392-3: “Interworking at the Inter-System Interface (ISI)“; ETS 300 392-4: “Gateways basic operation“; EN 300 392-5: “Peripheral Equipment Interface (PEI)“; EN 300 392-7: “Security“; EN 300 392-9: “General requirements for supplementary
23、services“; EN 300 392-10: “Supplementary services stage 1“; EN 300 392-11: “Supplementary services stage 2“; EN 300 392-12: “Supplementary services stage 3“; ETS 300 392-13: “SDL model of the Air Interface (AI)“; ETS 300 392-14: “Protocol Implementation Conformance Statement (PICS) proforma specific
24、ation“; TS 100 392-15: “TETRA frequency bands, duplex spacings and channel numbering“; TS 100 392-16: “Network Performance Metrics“; TR 100 392-17: “TETRA V+D and DMO specifications“; TS 100 392-18: “Air interface optimized applications“: Sub-part 1: “Location Information Protocol (LIP)“; Sub-part 2
25、: “Net Assist Protocol (NAP)“. NOTE: Part 10, sub-part 15 (Transfer of control), part 13 (SDL) and part 14 (PICS) of this multi-part deliverable are of status “historical“ and are not maintained. ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 61 Scope The present document defines Net Assist Protocol tha
26、t is optimized for TETRA air interface. It defines services: allowing information to be passed to a location determining entity; allowing a location determining entity to request assistance information. The information passed to the location determining entity, when relevant, reflects the content an
27、d format of the equivalent information (navigation data) which passes from satellites to the location determining entity. The protocol is capable of supporting more than one position determining technology. 2 References References are either specific (identified by date of publication and/or edition
28、 number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes of the ref
29、erenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. For online referenced documents, information sufficient to identify
30、 and locate the source shall be provided. Preferably, the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the method of a
31、ccess to the referenced document and the full network address, with the same punctuation and use of upper case and lower case letters. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The
32、 following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 ICD-GPS-200: “Navstar GPS Space Segmen
33、t / Navigation User Interfaces“. 2 ETSI EN 300 392-1: “Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 1: General network design“. 3 ETSI EN 300 392-2: “Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)“. 4 ETSI TS 100 392-18-1: “Terrestrial Trunked
34、Radio (TETRA); Voice plus Data (V+D) and Direct Mode Operation (DMO); Part 18: Air interface optimized applications; Sub-part 1: Location Information Protocol (LIP)“. ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 72.2 Informative references The following referenced documents are not essential to the us
35、e of the present document but they assist the user with regard to a particular subject area. For non-specific references, the latest version of the referenced document (including any amendments) applies. Not applicable. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present
36、document, the terms and definitions given in EN 300 392-2 3 and the following apply: assistance server: entity that maintains location assistance information and sends location assistance information to its clients navigation data: the data that is passed from satellites to the location determining
37、entity and supports said location determination, for example by defining satellite positioning NOTE: For GPS assistance this data is defined by ICD-GPS-200 1. TETRA domain: all entities that are addressed using TETRA defined addresses and understand the binary format of Net Assist Protocol 3.2 Abbre
38、viations For the purposes of the present document, the following abbreviations apply: BS Base Station C Conditional DMO Direct Mode Operation FE Functional Entity GPS Global Positioning System LA Location Area LIP Location Information Protocol M Mandatory MNI Mobile Network Identity MS Mobile Statio
39、n NAP Net Assist Protocol O Optional PDU Protocol Data Unit SAP Service Access PointSDS Short Data Service SDS-TL Short Data Service - Transport Layer SNDCP SAP SubNetwork Dependent Convergence Protocol Service Access Point SV Space Vehicle TMO Trunked Mode Operation UTC Universal Coordinated Time W
40、GS84 World Geodetic System 1984 ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 84 Net Assist Protocol 4.1 General The Net Assist Protocol (NAP) is a TETRA air interface optimized application layer protocol that can utilize various transport mechanisms. The net assist protocol may use SDS-TL service at S
41、DS-TL SAP, refer to EN 300 392-2 3, clauses 29.1.1 to 29.5.12 in the case of TETRA MS, though it does not use SDS-TL transport mechanisms to ensure delivery. The same protocol can use packet data at SNDCP SAP as defined in EN 300 392-2 3, clause 28 in the case of TETRA MS. The net assist protocol de
42、fines an extendable protocol that can provide net assist information, initially in a GPS technology based location determination scenario. Resource optimization is achieved by ensuring data is transported in its most compact form as binary data and not in an expanded human readable form. Because of
43、the volume of data and because of the number of satellites it should be noted that some messages have a length which exceeds 500 bits and multiple messages (one for each satellite) may need to be sent. The net assist protocol can be used in various system configurations including: MS to assistance s
44、erver communication (request for assistance information). Assistance server to MS communication (transmission of assistance information). MS to MS communication (request for and transmission of assistance information). NOTE: Although NAP supports direct MS to individual MS communication; the use of
45、it is discouraged as the optimized air interface usage may be compromised. One possibility to maintain air interface optimization is the use of a group address as the destination address. 4.2 Location information protocol system architecture Physical entities identified for the purpose of the presen
46、t document are: Mobile Station (MS) and location accessory requiring net assist information. Assistance server inside the TETRA domain with available net assist information (which may have been sourced outside the TETRA domain and passed to it using a suitable protocol which is outside the scope of
47、the present document). How the assistance server acquires its net assist information and how it decides when to make that information available are outside the scope of the present document. Similarly, how the MS determines when and what assistance information is required is outside the scope of the
48、 present document. The assistance information exchange contains scenarios: MS determines that it would like assistance and makes a request to the assistance server for information. Assistance server to MS, where the assistance server has net assist information, and the assistance server distributes
49、the information to MS. MS to MS net assist information exchange without any action in any other entities. For the purposes of the present document, the TETRA domain consists of entities that are addressable using TETRA addressing and understand the net assist protocol NAP in the binary format of the protocol. ETSI ETSI TS 100 392-18-2 V1.1.1 (2008-11) 9For the purposes of the present document protocol Functional Entities (FE) are used in some clauses instead of physical entities: FE1: MS requiring net assist information. FE2: Assistance s
