1、 Reference number ISO 25111:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 25111 First edition 2009-11-15 Intelligent transport systems Communications access for land mobiles (CALM) General requirements for using public networks Systmes intelligents de transport Accs aux communications des services mobi
2、les terrestres (CALM) Exigences gnrales pour lusage des rseaux publics ISO 25111:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are lic
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7、rland ii ISO 2009 All rights reservedISO 25111:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Conformance .1 3 Normative references2 4 Terms and definitions .2 5 Abbreviated terms.4 6 Requirements.4 7 Medium access control (MAC) .9 8 Service access point
8、(SAP) 9 9 CALM public wireless network manager 10 10 Test and conformance requirements 10 11 Marking, labelling and packaging10 12 Declaration of patents and intellectual property11 Annex A (normative) System overview, sequence and state diagrams12 Bibliography17 ISO 25111:2009(E) iv ISO 2009 All ri
9、ghts reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject
10、for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) o
11、n all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees
12、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. 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
13、 responsible for identifying any or all such patent rights. ISO 25111 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems. ISO 25111:2009(E) ISO 2009 All rights reserved vIntroduction This International Standard is part of a family of International Standards for communicati
14、ons access for land mobiles (CALM) which specify a common architecture, network protocols and a set of air interface definitions for wireless communications using a number of mobile (i.e. with horizontal or vertical cell/cell handover) wireless media, including cellular 2nd generation, cellular 3rd
15、generation, 5 GHz, millimetre wave, infrared communications, and mobile wireless broadband (MWB), over packet-based networks. The CALM architecture is also designed to include short-range, short-duration, low-latency communication systems such as European dedicated short-range communications (DSRC)
16、and North American wireless access in vehicular environments (WAVE) based on IEEE 802.11. It is anticipated that other air interfaces will be added in the future. Generally speaking, the CALM architecture is designed to include air interfaces that provide some subset of point-to-point, vehicle-to-ve
17、hicle and vehicle-to-point communications over packet-based networks in the ITS sector. In particular, this Standard provides general specifications for air interfaces designed to provide mobile access to packet-based networks. The requirements for transmission of information over large distances us
18、ing wireless technology are functionally very different from the requirements for European DSRC. Large volumes of data are required for purposes such as safety, traffic information and management, video downloads to vehicles for tourist information and entertainment, and navigation system updates. I
19、n order to support such services, mobile units need to be able to communicate over longer ranges with access points/base stations, and the system must be able to hand over sessions from one access point/base station to another (horizontal or vertical). CALM standards are explicitly designed to enabl
20、e quasi-continuous data communications as well as data communications of protracted duration between vehicles and service providers, and between vehicles. It is important to note that the CALM architecture is specifically designed to support packet-based communications; support for circuit-switched
21、communications is not included. The fundamental advantage of the CALM concept over traditional systems is the ability to support media independent handover (MIH), also referred to as heterogeneous handover, between the various media that can be included in a CALM system. Selection policies are suppo
22、rted that include user preferences and media capabilities in making decisions as to which media to use for a particular session, and when to hand over between media or between service providers on the same medium. These handover mechanisms are defined within the CALM architecture International Stand
23、ard (ISO 21217), the CALM IPv6 networking for internet connectivity International Standard (ISO 21210), the CALM medium service access points International Standard (ISO 21218) and the CALM communication and station management International Standard (ISO 24102). Handovers between access points using
24、 the same technology and service provider use mechanisms that are defined within the particular medium-specific CALM Standard. ITS applications that can be enhanced or are enabled by the CALM architecture include car-to-car and point- to-multipoint safety messaging, collision avoidance, update of ro
25、adside telemetry and messaging, probe data collection, general internet access, image and video transfer, infotainment, multimedia multicast, traffic management, monitoring and enforcement in mobile situations, and route guidance, just to mention a few. INTERNATIONAL STANDARD ISO 25111:2009(E) ISO 2
26、009 All rights reserved 1Intelligent transport systems Communications access for land mobiles (CALM) General requirements for using public networks 1 Scope This International Standard specifies general requirements for the provision of ITS services, using the CALM architecture and protocols, via the
27、 use of public wireless networks including cellular telephony and mobile wireless broadband (MWB) systems. In particular, this International Standard specifies protocols and parameters that public wireless networks shall include to support prolonged communication links in ITS environments where hete
28、rogeneous handovers or media independent handovers (MIH) are either necessary to maintain the link, or desirable as determined by media selection policies, and such handover is provided by the public wireless network. The requirements for the use of CALM via public wireless networks where there is n
29、o provision for heterogeneous cell/cell handover (i.e. so-called nomadic services) is not the central focus of this International Standard, but general requirements to enable the use of such systems, within the limits of the range of a single cell, are also provided. Wherever practicable, this Inter
30、national Standard has been developed by reference to suitable extant standards, adopted by selection. Required regional variations are provided. Specifically, for this International Standard, extant national and International Standards for public wireless networks are adopted by reference and are no
31、t redefined herein. Application-specific upper layers are not included in this International Standard, but will be driven by application standards (which might not be technology specific). 2 Conformance In order to claim conformance with this International Standard, communication shall be establishe
32、d in full compliance with procedures and protocols for the appropriate public wireless networks standards, and shall comply with the requirements of ISO 21210 (CALM IPv6 networking), ISO 21217 (CALM system architecture), ISO 21218 (CALM medium service access points), and ISO 24102 (CALM management).
33、 Local area public wireless networks that support nomadic wireless systems, without cell/cell handover, cannot claim compliance with this International Standard. ISO 25111:2009(E) 2 ISO 2009 All rights reserved3 Normative references The following referenced documents are indispensable for the applic
34、ation 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 21210, Intelligent transport systems Communications access for land mobiles (CALM) IPv6 Networking ISO 21217, In
35、telligent transport systems Communications access for land mobiles (CALM) Architecture ISO 21218, Intelligent transport systems Communications access for land mobiles (CALM) Medium service access points ISO 24102, Intelligent transport systems Communications access for land mobiles (CALM) Management
36、 4 Terms and definitions For the purposes of this document, the following terms and definitions apply. 1)4.1 broadband characteristic of systems that support information transmission rates greater than the primary rate (4.12) NOTE The definition given here is consistent with that given in ITU-R F.13
37、99. 4.2 CALM application session association of two or more parties for the provision of CALM application service and which, until its termination, can involve more than one communication session in order to exchange information (i.e. are involved in a transaction) NOTE 1 A CALM application session
38、is not possible unless a communication session (4.4) is first established. NOTE 2 An application session will normally involve multiple bidirectional transfers of data, but can be a unidirectional transfer of data. 4.3 cell communication zone/service area of a wireless access point (AP) or base stat
39、ion 4.4 communication session association of two or more wireless communication devices between which a functional wireless communication link is available for mutual exchange of data/information NOTE Application sessions (see 4.2) engage in and complete transactions using communication sessions. 4.
40、5 fixed wireless broadband system wireless broadband system including communication between user terminals and wireless access points in which the locations of the user terminals and the wireless access points are stationary NOTE The definition given here is consistent with that given in ITU-R F.139
41、9. 1) Reference should also be made to ISO 21217. ISO 25111:2009(E) ISO 2009 All rights reserved 34.6 handover process of switching a communications transaction in progress from one communication cell to another or between radio channels in the same cell NOTE Handover is used to allow established se
42、ssions to continue when mobile stations move from one cell/AP to another and as a method for minimizing co-channel interference. 4.7 local area wireless broadband system wireless broadband system including communication between user terminals and wireless access points in which the user terminals ma
43、y move within the communication zones of the wireless access points during communication sessions, but session handover between wireless access points is not supported 4.8 media independent handover handover in which a change of media may or may not be involved 4.9 mobile wireless broadband system w
44、ireless broadband system including communication between user terminals and wireless access points in which the user terminals may move within and between the communication zones of the wireless access points during communication sessions, and session handover between wireless access points is suppo
45、rted 4.10 nomadic wireless broadband system wireless broadband system including communication between user terminals and wireless access points in which the location of the user terminals and the wireless access points may change, but are stationary during communication sessions NOTE The definition
46、given here is consistent with that given in ITU-R F.1399. 4.11 on-board equipment equipment or device installed or put on-board implementing CALM functionalities 4.12 primary rate data transmission rate of either 1 544 kbps or 2 048 kbps (depending on the network) NOTE The primary rate is not necess
47、arily the end-user data rate. 4.13 public service wireless services available to the public and non-ITS-specific which can support connection between or among registered subscribers and may provide access to the internet 4.14 public wireless network wireless communications network which supports pub
48、lic services (4.13) such as cellular telephony, mobile wireless broadband systems (4.10) and satellite systems 4.15 wireless broadband system wireless communication system supporting broadband transmission rates over an air interface NOTE Wireless broadband systems can be fixed, nomadic, local area
49、or mobile. ISO 25111:2009(E) 4 ISO 2009 All rights reserved5 Abbreviated terms AP access point CALM communications access for land mobiles CME CALM management entity DSRC dedicated short-range communication HC-SDMA high capacityspatial division multiple access (ANSI/ATIS 0700004-2007) IEEE Institute for Electrical and Electronics Engineers ITU International Telecommunications Union ITU-R ITU-Radiocommunications sector MIH media independent handover (mobile) WiMAX (mobile) worldwide interoperability for microw
