1、 ETSI TS 103 358 V1.1.1 (2018-06) Short range devices; Low Throughput Networks (LTN) Architecture; LTN Architecture TECHNICAL SPECIFICATION ETSI ETSI TS 103 358 V1.1.1 (2018-06)2 Reference DTS/ERM-TG28-504 Keywords architecture, interface, LTN, OSSS, radio, SRD, UNB ETSI 650 Route des Lucioles F-069
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6、ation No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm 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 an
7、d the foregoing restriction extend to reproduction in all media. ETSI 2018. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTETMare trademarks of ETSI registered for the benefit of its Members and of the
8、3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 103 358 V1.1.1 (2018-06)3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g31 Scope 5g32
9、 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 LTN architecture description 6g34.1 Overall description . 6g34.2 LTN reference architecture. 7g34.3 LTN functional blocks 8g34.3.1 End-point 8g3
10、4.3.2 Relay point 8g34.3.3 Base station . 8g34.3.4 Service centre 8g34.3.5 Registration authority . 9g34.4 LTN interfaces 9g34.4.1 Interface A 9g34.4.2 Interface A . 9g34.4.3 Interface A . 9g34.4.4 Interface B 10g34.4.5 Interface C 10g34.4.6 Interface D 10g35 LTN key characteristics 10g35.1 Cooperat
11、ive reception over air interfaces . 10g35.2 LTN politeness and coexistence . 11g35.3 Options, profiles and families. 11g35.4 End-point classes 11g3Annex A (informative): LTN and other LPWAN systems 12g3History 14g3ETSI ETSI TS 103 358 V1.1.1 (2018-06)4 Intellectual Property Rights Essential patents
12、IPRs essential or potentially essential to normative deliverables 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 000 314: “Intellectual Property Rights (IPRs); Essential,
13、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 (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by
14、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, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asser
15、ted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement b
16、y ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). Modal verbs terminology In the present document “shall“, “shall not
17、“, “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 when used in direct cita
18、tion. ETSI ETSI TS 103 358 V1.1.1 (2018-06)5 1 Scope The Internet of Things (IoT) presents a wide and growing range of communications requirements. Certain of these requirements are addressed by systems which are referred to as Low Throughput Networks (LTN) in ETSI documents. The use cases addressed
19、 by LTN systems and the LTN systems characteristics are provided in ETSI TR 103 249 i.1. LTN systems may be considered to be a subset of Low Power Wide Area Networks (LPWAN), that may include other systems, already existing or developed in the future. The present document specifies the architecture
20、of LTN systems. It contains requirements and/or recommendations on functional blocks and interfaces that are related to the architecture (i.e. high-level description) of LTN systems. The present document develops the work done in LTN ISG i.2 on architecture for LTN systems. The present document shou
21、ld be read in conjunction with the LTN document i.1 and related documents, in which details of entities and interfaces are documented. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For
22、 specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Ref
23、erence. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long-term validity. The following referenced documents are necessary for the application of the present document. 1 ETSI EN 300 220-1 (V3.1.1) (02-2017): “Short Range Devices
24、 (SRD) operating in the frequency range 25 MHz to 1 000 MHz; Part 1: Technical characteristics and methods of measurement“. 2 ETSI EN 300 220-2: “Short Range Devices (SRD) operating in the frequency range 25 MHz to 1 000 MHz; Part 1: Technical characteristics and methods of measurement“. 3 IEEE EUI-
25、64: “Guidelines for 64-bit Global Identifier (EUI-64)“. 2.2 Informative 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 lat
26、est version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long-term validity. The following referenced documents are not necessary for the application of the present
27、 document but they assist the user with regard to a particular subject area. i.1 ETSI TR 103 249 (V1.1.1): “Low Throughput Network (LTN); Use Cases and System Characteristics“. i.2 ETSI GS LTN 002 (V1.1.1) (2014-09): “Low Throughput Networks (LTN); Functional Architecture“. ETSI ETSI TS 103 358 V1.1
28、.1 (2018-06)6 i.3 ETSI EN 303 204 (V2.1.2) (09-2016): “Network Based Short Range Devices (SRD); Radio equipment to be used in the 870 MHz to 876 MHz frequency range with power levels ranging up to 500 mW; Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53
29、/EU“. i.4 PerOlof Bengtsson, Nico Lassing, Jan Bosch and Hans van Vliet: “Analysing Software Architecture for Modifiability“, Research Report 11/00, Department of Software Engineering and Computer Science, University of Karlskrona/Ronneby, Sweden, ISSN 1103-1581. 3 Definitions and abbreviations 3.1
30、Definitions For the purposes of the present document, the following terms and definitions apply: LTN family: complete solution within the scope of the LTN standard NOTE: LTN families are not necessarily interoperable. LTN standard: technical specifications developed by ETSI which describe architectu
31、re and protocols of LTN systems NOTE: LTN standard comprises one or more families. LTN system: physical instantiation of an LTN family NOTE: The geographical deployment of an LTN system may vary on scale between local and global, including discontinuous coverage. 3.2 Abbreviations For the purposes o
32、f the present document, the following abbreviations apply: BS Base Station DA Device Application DL DownLink EP End-PointIoT Internet of Things IP Internet Protocol LPWAN Low Power Wide Area Network LTN Low Throughput Network NA Network Application RA Registration Authority RP Relay Point SC Service
33、 CentreSRD Short Range Device UL UpLink UNB Ultra Narrow Band 4 LTN architecture description 4.1 Overall description LTN systems comprise a radio network and a core network tailored to the connectivity of IoT devices. Figure 4-1 is the overall architecture description of any LTN system. Blue boxes a
34、nd blue lines are part of the LTN system, whereas grey lines and grey boxes are application specific. ETSI ETSI TS 103 358 V1.1.1 (2018-06)7 Figure 4-1: Overall architecture description of an LTN system (for information only) In Figure 4-1, the radio access network, which consists in base stations,
35、exhibits an optional feature where end-points and relay points are received by more than one base station at a time. This feature is named “cooperative reception“ in the context of the LTN standard; it is a kind of macro-diversity (see clause 5.1 for detailed description). 4.2 LTN reference architec
36、ture This clause gives the reference architecture as the basis for all LTN families. It is a high-level decomposition into major components with a characterization of the interaction of the components (definition derived from i.4). Figure 4-2 depicts the LTN reference architecture in terms of functi
37、onal blocks (i.e. the components) and their interfaces (i.e. the interactions), as described in the present document. Figure 4-2: LTN reference architecture The reference architecture depicted in the above Figure 4-2 applies to stand-alone LTN systems. If multiple LTN systems are deployed, interconn
38、ection between them may be required for the management of roaming end-points. In such case, the interface D should implement the interconnection between service centres of LTN systems (see Figure 4-3). ETSI ETSI TS 103 358 V1.1.1 (2018-06)8 Figure 4-3: Reference architecture for interconnection of L
39、TN systems 4.3 LTN functional blocks 4.3.1 End-point An End-Point (EP) is a leaf node of an LTN system that communicates application data between local Device Application (DA) and Network Application (NA). It shall connect to a base station over the A interface. If relay points are supported, it sha
40、ll connect to a relay point over the A“ interface. An EP shall be identified by a IEEE EUI-64 3 globally unique identifier. An EP should run only one single device application and should belong to one single network application at a time. 4.3.2 Relay point A Relay Point (RP) is an optional node in a
41、n LTN system. It shall connect to an EP over A interface and to a base station over A interface. A RP may also communicate application data between local Device Application (DA) and Network Application (NA). A RP shall be identified by a IEEE EUI-64 globally unique identifier. NOTE: A RP is typicall
42、y a low complexity node supporting a limited number of EPs with limited support for EP mobility. 4.3.3 Base station A Base Station (BS) is a radio hub of an LTN system. It shall connect to a single service centre over interface B. It shall connect to end-points over interface A and relay points over
43、 interface A. Base stations should implement provision for reduced service in case of disconnection from the SC. 4.3.4 Service centre An LTN system shall have a single Service Centre (SC). The SC may perform the following functions: forwarding application data packet, both uplink and downlink; EP au
44、thentication, acting as either the other party of the authentication or a relay between the two authenticating parties; configuration and/or subscription management of end-points and relay points; ETSI ETSI TS 103 358 V1.1.1 (2018-06)9 support for cooperative reception and duplicate elimination; man
45、agement of base stations; management of roaming with other service centres. A Service Centre shall use: interface B for connection to base stations; interface C for connection to a registration authority; interface D for connections to other LTN system(s) for roaming purposes. Service centre connect
46、s network applications over an Internet-based interface, which is out of scope of the present document. 4.3.5 Registration authority An LTN system shall include the functionality of a Registration Authority (RA). The RA shall store identifiers and credentials of end-points and/or relay points. It ma
47、y also store other parameters, such as: secret key; class of transmit power; class of EP; frequency capability; owner of the EP and/or RP; charge/service plan; etc. The RA shall use interface C for connection to SC. 4.4 LTN interfaces 4.4.1 Interface A Interface A is the air interface between EPs an
48、d BS. It shall be the primary air interface of any LTN system. It shall be a unidirectional or bidirectional interface between EP and BS. Interface A shall support EP mobility. It may carry signalling messages. Interface A shall exhibit the following specific features: maximum coupling loss of at le
49、ast 150 dB; random access for uplink transmission of messages; half duplex. 4.4.2 Interface A Interface A is the air interface between RP and BS. It shall be a bidirectional or unidirectional interface. 4.4.3 Interface A Interface A“ is the air interface between EP and RP. It shall be a bidirectional or unidirectional interface. ETSI ETSI TS 103 358 V1.1.1 (2018-06)10 4.4.4 Interface B Interface B is the interface between a BS and the SC. Data flow over the interface B may include decoded UL radio bu
