1、 ETSI GS LTN 002 V1.1.1 (2014-09) Low Throughput Networks (LTN); Functional Architecture Disclaimer This document has been produced and approved by the Low Throughput Networks (LTN) ETSI Industry Specification Group (ISG) and represents the views of those members who participated in this ISG. It doe
2、s not necessarily represent the views of the entire ETSI membership. GROUP SPECIFICATION ETSI ETSI GS LTN 002 V1.1.1 (2014-09) 2Reference DGS/LTN-002 Keywords IoT, LTN, M2M 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
3、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 The present document may be made available in electronic versions and/or in print. The content of any electron
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7、rofilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2014. All rights
8、 reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and own
9、ed by the GSM Association. ETSI ETSI GS LTN 002 V1.1.1 (2014-09) 3Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 5g33.1 Definiti
10、ons 5g33.2 Abbreviations . 6g34 Low Throughput Networks 6g35 Architecture 7g36 LTN data flow 10g36.1 Uplink data flow . 10g36.2 Downlink data flow 11g37 Overall system requirements 12g37.1 LEP . 12g37.1.1 LTN module characteristics 12g37.2 LTN Radio Networks . 13g37.3 LAP 13g37.3.1 LTN radio front e
11、nd 13g37.3.2 LTN messages management . 13g37.3.3 LTN Network Management agent 13g37.3.4 LTN Server . 14g37.3.4.1 LTN Message processing 14g37.3.4.2 Networks management 14g37.4 CRA (for UNB implementation only) 14g38 Interface description . 15g38.1 Interface A 15g38.2 Interface B 15g38.3 Interface C
12、15g38.4 Interface D 15g38.5 Interface E 15g38.6 Interface F 15g38.7 Interface A . 15g38.8 Interface C . 15g38.9 Interface F 15g39 Interoperability scenario and deployment 16g3Annex A (informative): Authors Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, whic
13、h is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/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 E
14、TSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Low Throughput Networks (LTN). Modal verbs terminology In the present doc
15、ument “shall“, “shall not“, “should“, “should not“, “may“, “may not“, “need“, “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
16、deliverables except when used in direct citation. Introduction Low Throughput Network (LTN) is a technology of wide area wireless network with specific characteristics compared to existing radio networks. LTN enables long range data transportation (distances up to 40 km in open field) and has the ca
17、pacity to communicate with underground equipment, using minimal power consumption. Furthermore, the low throughput transmission combined with advanced signal processing provides effective protection against interference. As a consequence, LTN is particularly well adapted for low throughput machine t
18、o machine (M2M) traffic where latency may be low. LTN can be applied to autonomous battery operated M2M devices that sends only a few bytes per day, week or month. LTN networks can cooperate with cellular networks addressing use cases where redundancy, complementary or alternative connectivity is su
19、itable. The elements provided in the present document are intended to identify potential areas of standardization to ensure interoperability and provide guidelines for device, modem and software solutions for vendors, integrators and operators. The present document is intended for an audience with a
20、 technical perspective, whereas the use case document GS LTN 001 1 addresses a business-oriented view on LTN. Clause 5 describes the LTN architecture. Clause 6 deals with uplink and downlink data flows. Clause 7 describes the overall system requirements. Clause 8 describes the various LTN interfaces
21、. Clause 9 deals with interoperability in LTN. ETSI ETSI GS LTN 002 V1.1.1 (2014-09) 51 Scope The present document aims to: describe the characteristics of the architecture of a Low Throughput Network; illustrate the applicability of LTN in industrial communication; highlight the specificity of LTN
22、deployment. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amen
23、dments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1
24、 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI GS LTN 001: “Low Throughput Networks (LTN); Use Cases for Low Throughput Networks“. 2.2 Informative references The following referenced documents are not necessary for the appli
25、cation of the present document but they assist the user with regard to a particular subject area. i.1 Recommendation ITU-T I.113: “Vocabulary of terms for broadband aspects of ISDN“. i.2 ETSI TS 127 007 (V11.8.0): “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunica
26、tions System (UMTS); LTE; AT command set for User Equipment (UE) (3GPP TS 27.007 version 11.8.0 Release 11)“. i.3 ETSI TS 102 921: “Machine-to-Machine communications (M2M); mIa, dIa and mId interfaces“. i.4 TIA-232-F: “Interface Between Data Terminal Equipment and Data Circuit- Terminating Equipment
27、 Employing Serial Binary Data Interchange“. i.5 NXP : UM102014: “IC bus Specification and user manual“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: average daily throughput: average daily data volume per LTN Obj
28、ect backend systems: information system that runs applications and back-office features ETSI ETSI GS LTN 002 V1.1.1 (2014-09) 6bearers: information transmission path of defined capacity, delay and bit error rate collaborative reception: ability to receive the signal of an LTN object by multiple ante
29、nnas and LAP located on different locations collected data: data coming from the application (e.g. index value) and coming from the LEP modem itself (battery level, TC, etc.) instantaneous throughput: raw data rate per frame per LEP interface specification: document that defines the requirements for
30、 interoperability between architecture blocks payload: part of a data stream representing the user information throughput: parameter describing service speed NOTE: The number of data bits successfully transferred in one direction between specified reference points per unit time (see i.1). 3.2 Abbrev
31、iations For the purposes of the present document, the following abbreviations apply: ADSL Asymetric Digital Subscriber Line API Application Programming Interface AT Attention BSS Business Support System CRA Central Registration Authority CRC Cyclic Redundancy Check GSM Global Mobile System IP Intern
32、et Protocol IS Information SystemLAP LTN Access Point LEP LTN End Point LTN Low Throughput Network NID UNB Node Identifier NM Network ManagementOSS Operation Support System OSSS Orthogonal Sequence Spread Spectrum PAC Porting Authorization Code SAS Service As Software SIM Subscriber Identity Module
33、SPI Serial Physical Interface UNB Ultra Narrow Band WAN Wide Area Network 4 Low Throughput Networks Wireless machine to machine (M2M) is currently using either GSM networks or proprietary radio networks. A number of M2M use cases require long battery life and long range coverage while using small pa
34、yload and limited throughput. LTN overcomes classical radio network limitation and complexity by optimizing the power consumption and the link budget. This kind of networks is mainly dedicated for user data collection but can also provide bidirectional features such as acknowledge mechanism and Geo-
35、localization. The LTN has an optimized link budget and connexion less access scheme, suitable for battery-operated LEP. The LTN high link budget allows also extended coverage range. Initial manufacturing embeds LEPs credentials that enable plug and play implementation for the end users. ETSI ETSI GS
36、 LTN 002 V1.1.1 (2014-09) 7LTN typical properties are: A throughput around 200 Bytes per day (typical) to 5 kBytes per day (maximum). A Payload size of 12 Bytes (maximum 255 Bytes). Instantaneous Throughput: 10-1 000 bit/s (50 kbit/s maximum) peak with technology that allow an adaptive throughput co
37、rrelate to the link budget. Ability to handle up to 10 connected objects per inhabitant. Ability to provide security functions between the LTN Object and application provider platform: e.g. spoofing anti theft, tempering, rolling code, etc. Figure 1 illustrates a comparison between classical radio t
38、echnologies and LTN in terms of range, throughput and radiated power. Figure 1: Energy M2M service requirements“. ETSI TS 102 690: “Machine-to-Machine communications (M2M); Functional architecture“. ETSI EN 300 220: “Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices
39、 (SRD); Radio equipment to be used in the 25 MHz to 1 000 MHz frequency range with power levels ranging up to 500 mW“. ETSI EN 300 113-1: “Electromagnetic compatibility and Radio spectrum Matters (ERM); Land mobile service; Radio equipment intended for the transmission of data (and/or speech) using
40、constant or non-constant envelope modulation and having an antenna connector; Part 1: Technical characteristics and methods of measurement“. ETSI EN 300 113-2: “Electromagnetic compatibility and Radio spectrum Matters (ERM); Land mobile service; Radio equipment intended for the transmission of data
41、(and/or speech) using constant or non-constant envelope modulation and having an antenna connector; Part 2: Harmonized EN covering the essential requirements of article 3.2 of the R Wideband transmission systems; Data transmission equipment operating in the 2,4 GHz ISM band and using wide band modulation techniques; Harmonized EN covering the essential requirements of article 3.2 of the R Protocols and Interfaces“. ETSI ETSI GS LTN 002 V1.1.1 (2014-09) 20History Document history V1.1.1 September 2014 Publication
