1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 29282:2011Intelligent transport systems Communications accessfor land mobiles (CALM) Satellite networksBS ISO 29282:2011 BRITISH STANDARDNational forewordThis British Stan
2、dard is the UK implementation of ISO 29282:2011.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/278, Road transport informatics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to includ
3、e all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 65915 7ICS 03.220.01; 35.240.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards
4、 Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate Text affectedBS ISO 29282:2011Intelligent transport systems Communications access for land mobiles (CALM) Satellite networksSystmes intelligents de transport Accs aux communications des services mobiles terrestr
5、es (CALM) Applications utilisant les rseaux satellitaires ISO 2011Reference numberISO 29282:2011(E)First edition2011-07-15ISO29282INTERNATIONAL STANDARDBS ISO 29282:2011ISO 29282:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All rights reserved. Unless otherwise specified, no part of this publication
6、may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel.
7、+ 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 29282:2011ISO 29282:2011(E)Contents PageForeword ivIntroduction v1 Scope 12 Conformance 13 Normative references .14 Terms and definitions .25 Abbreviated terms .2
8、6 Background .36.1 Proprietary connectivity protocols .36.2 Internet connectivity .57 Requirements .57.1 General .57.2 Adoption of satellite standards and internationally adopted practices .67.3 CALM architecture and application grouping67.4 CALM networking protocols .67.5 CALM medium service access
9、 points .67.6 CALM “ITS station management” .67.7 CALM using public wireless networks 77.8 Establishment and termination of medium specific sessions 77.9 Interface medium management .78 Medium access control (MAC) .78.1 Conformance 78.2 CALM satellite communications MMAE service primitives .78.3 Sat
10、ellite communication MMAE .88.4 CALM session connection 108.5 CALM session disconnection 108.6 Change of satellite communications connection state .108.7 Retrieval of medium status .118.8 Satellite communications specific connection aspects .118.9 Satellite communications session disconnection .129
11、Test and conformance requirements .1210 Declaration of patents and intellectual property 12Bibliography .13 ISO 2011 All rights reserved iiiBS ISO 29282:2011ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). Th
12、e work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-gov
13、ernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.Th
14、e main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote
15、.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 29282 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.ISO 29282:201
16、1(E)iv ISO 2011 All rights reservedBS ISO 29282:2011IntroductionThis International Standard is part of a family of International Standards based on the communications access for land mobiles (CALM) concept. These International Standards specify a common architecture, network protocols and communicat
17、ion interface definitions for wireless communications using various access technologies including cellular 2nd generation, cellular 3rd generation, satellite, infra-red, 5 GHz microwave, 60 GHz millimetre-wave and mobile wireless broadband. These and other access technologies that can be incorporate
18、d are designed to provide broadcast, unicast and multicast communications between mobile stations, between mobile and fixed stations and between fixed stations in the intelligent transport systems (ITS) sector.CALM standards are explicitly designed to enable quasi-continuous communications as well a
19、s communications of protracted duration between vehicles and service providers, and between vehicles.The fundamental advantage of the CALM concept over traditional systems is the ability to support media independent handover (MIH), also referred to as heterogeneous or vertical handover, between the
20、various media supported by CALM (e.g. cellular, microwave, mobile wireless broadband, infra-red, DSRC, and satellite). The CALM concept supports selection policies that include user preferences and media capabilities in making decisions as to which medium to use for a particular session, and when to
21、 hand over between media or between service providers on the same medium. These handover mechanisms are defined within the CALM architecture International Standard, ISO 21217, the CALM IPv6 networking protocols International Standard, ISO 21210, the CALM medium service access points International St
22、andard, ISO 21218, and the CALM station management International Standard, ISO 24102. Handovers between access points using the same technology and service provider use mechanisms that are defined within the particular medium-specific CALM standard.Satellite communications provide very broad coverag
23、e and are particularly useful in areas where there is no terrestrial wireless communications coverage, or when such systems are overloaded or have poor coverage. As satellite systems evolve, these systems may provide an alternative communication route in many situations. CALM station management will
24、 be able to ensure that the most appropriate network, of those available, will be used to improve ITS availability and reliability at the minimum cost. Example applications include urgent emergency messages such as eMessage or eCall, where an eCall over cellular radio may not be possible at the site
25、 of an accident, because of lack of cellular coverage.Satellite communications systems will also be able to provide infill coverage where the deployment of the CALM M5 infrastructureset out in ISO 21215 is incomplete. Furthermore, satellite communications that support IPv6 broadcast mode will also s
26、upport the geo-networking protocols that are currently being developed and standardized.Additionally, satellite systems may be installed at ITS stations primarily because of the broadcast and paging services that they can deliver to support applications and the management of connections. The interfa
27、ce for broadcast satellite communications is defined in ISO 13183, using a protocol which is common to all of the broadcast media.ISO 29282:2011(E) ISO 2011 All rights reserved vBS ISO 29282:2011BS ISO 29282:2011INTERNATIONAL STANDARD ISO 29282:2011(E)Intelligent transport systems Communications acc
28、ess for land mobiles (CALM) Satellite networks1 ScopeThis International Standard provides definitions and procedures for the establishment, maintenance and termination of an ITS (intelligent transport systems) communications session within a CALM (communication access for land mobiles) system enviro
29、nment using bi-directional satellite communications.It defines the operation of the medium management adaptation entity (MMAE), which provides the management interface between a proprietary satellite communications medium and the “ITS station management”. This enables the “ITS station management” to
30、 know the status of the communications medium and control the interface without the need for applications at the ITS station to have any knowledge of the satellite communications interface. The procedures that the “ITS station management” expects to use are also explained.NOTE 1 CALM links are requi
31、red for quasi-continuous, prolonged and short-duration communications between vehicles and the roadside, between vehicles, and between mobile equipment and fixed infrastructure points, over medium and long ranges.This International Standard defines how to connect and disconnect a communication sessi
32、on using satellite communication systems in the context of an application operated within the environment defined in ISO 21217. It supports peer-to-peer modes of communication. Support for broadcast satellite systems is defined in ISO 13183, which provides a common approach for all broadcast media.
33、It supports satellite communications networks that are interconnected with the public network, as well as those which connect via the internet and those which provide a stand-alone capability.NOTE 2 As there are multiple instantiations of satellite systems, most of which are not interoperable, there
34、 is the possibility of several simultaneous satellite sessions, each forming a separate CALM medium (although the differences may only be in software within the on-board equipment).Wherever practicable, this International Standard has been developed by reference to suitable existing standards, adopt
35、ed by selection. Application-specific upper layers are not included, but will be driven by application standards (which may not be technology-specific).2 ConformanceIn order to conform with this International Standard, communications using satellite communications protocols shall be established in f
36、ull compliance with local telecommunications procedures and protocols and shall comply with the requirements of ISO 21210, ISO 21217, ISO 21218, ISO 24102 and ISO 25111. See Clause 3.NOTE 1 ITU-T standards for satellites mostly relate to traditional telecommunications services such as voice, X21 and
37、 X25. In general, satellite services are delivered as closed proprietary solutions with standardized external interfaces, including ITU-T V.24 (EIA-232/RS-232), ITU-T V.11 (EIA-422/RS-422), ITU-T V.35 (EIA-449/RS-449), EIA-530/RS-530, ITU-T X-21 and EIA-423/RS-423. Such systems are not recommended f
38、or integration into ITS because of the need to provide adaptation to support IP communications.NOTE 2 IPv6 systems are now being developed but have not yet been standardized. This interface International Standard has been developed to be consistent with these emerging new services.3 Normative refere
39、ncesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2011 All rights reserved 1BS ISO 29282:20
40、11ISO 21210, Intelligent transport systems Communications access for land mobiles (CALM) IPv6 Networking1)ISO 21217, Intelligent transport systems Communications access for land mobiles (CALM) ArchitectureISO 21218, Intelligent transport systems Communications access for land mobiles (CALM) Medium s
41、ervice access pointsISO 24102, Intelligent transport systems Communications access for land mobiles (CALM) ManagementISO 25111, Intelligent transport systems Communications access for land mobiles (CALM) General requirements for using public networks4 Terms and definitionsFor the purposes of this do
42、cument the terms and definitions given in ISO 21217 and the following apply.4.1CALM application sessionassociation of two or more parties for the provision of CALM application service, which, until its termination, can involve more than one communication session in order to exchange information (i.e
43、. are involved in a transaction)NOTE 1 A CALM application session is not possible unless a communication session (4.2) is first established.NOTE 2 An application session will normally involve multiple bidirectional transfers of data, but can be a unidirectional transfer of data.ISO 251114.2communica
44、tion sessionassociation of two or more wireless communication devices between which a functional wireless communication link is available for mutual exchange of data/informationNOTE Application sessions (see 4.1) engage in and complete transactions using communication sessions.ISO 251115 Abbreviated
45、 termsCALM communications access for land mobilesCI communication interfaceCMPL communication module protocol layerDSRC dedicated short range communicationETSI European Telecommunications Standards Institute FSS fixed satellite servicesGEO geostationary earth orbit GNSS global satellite navigation s
46、ystemGSM global system for mobile communicationsIN-SAP interface service access point (formerly “C-SAP”)IPv4 internet protocol version 41) To be published.ISO 29282:2011(E)2 ISO 2011 All rights reservedBS ISO 29282:2011IPv6 internet protocol version 6ITS intelligent transport systemsLEO low (altitud
47、e) earth orbitMAC medium access controlMEO medium (altitude) earth orbitMI-SAP management service access point (formerly “M-SAP”)MMAE medium management adaptation entityMSS mobile satellite servicesMSS/ATC mobile satellite services with ancillary terrestrial componentsPCS personal communications ser
48、viceSAP service access pointSAR search and rescue6 Background6.1 Proprietary connectivity protocolsSatellite communications systems are implemented in a variety of ways, delivering different characteristics. It is useful to have an overview of these implementations and their characteristics because
49、these will affect the way that CALM applications will use these systems. This will therefore affect the design of CALM systems that use satellite communications.Geostationary earth orbit (GEO) satellites orbit over the equator at the same rotation rate as the earth, so appear to be stationary above the equator (35,786 km above the earths surface). A set of satellites at fixed positions ensure that all longitudes can be covered; however, coverage at higher latitudes is limited, with significant obstruction possible in urban
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