1、BSI Standards PublicationBS ISO 21214:2015Intelligent transport systems Communications access forland mobiles (CALM) Infra-red systemsBS ISO 21214:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 21214:2015. Itsupersedes BS ISO 21214:2006 which is withdrawn
2、.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/278, Intelligent transport systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract.
3、 Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 72502 9ICS 03.220.01; 35.240.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、 authority of theStandards Policy and Strategy Committee on 31 July 2015.Amendments issued since publicationDate Text affectedBS ISO 21214:2015 ISO 2015Intelligent transport systems Communications access for land mobiles (CALM) Infra-red systemsSystmes intelligents de transport Accs aux communicatio
5、ns des services mobiles terrestres (CALM) Systmes infrarougesINTERNATIONAL STANDARDISO21214Second edition2015-08-01Reference numberISO 21214:2015(E)BS ISO 21214:2015ISO 21214:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unl
6、ess otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the
7、address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 21214:2015ISO 21214:2015(E)Foreword viiIntroduction viii1 Scope . 12 Conforma
8、nce . 13 Normative references 24 Terms and definitions . 24.1 General terms and definitions . 24.2 Terms and definitions of the optical parameters 45 Symbols (and abbreviated terms) 76 Requirements: Transmitter and receiver parameters .106.1 Transmitter wavelengths and bandwidths 106.2 Radiated powe
9、r . 116.2.1 Radiated power limits 116.2.2 Transmitter classes .116.3 Receiver wavelengths and bandwidths 116.4 Receiver class 127 Modulation and coding .127.1 Wake-up modes . 127.1.1 85 kHz coded WU .127.1.2 Transmitter generic modulation parameters 137.1.3 Receiver generic modulation parameters .13
10、7.2 Communications profiles 137.3 Profile 0 (base profile) and profile 1 (default profile) modulation 147.4 Profile 2 to profile 6 . 148 Directivity and communication zones 158.1 Directivity parameters 158.2 Communication zones . 168.2.1 Basic beam .168.2.2 Communication zone construction .168.2.3 C
11、ommunication zones shortcuts .169 Frames and windows 179.1 General structure . 179.2 Frame . 189.2.1 Frame structure .189.2.2 Frame synchronisation signal (F-Sync) .199.3 Windows 199.3.1 Window structure and types 199.3.2 Window synchronisation (W-Sync)199.3.3 Management window .209.3.4 Private wind
12、ow 229.3.5 Broadcast window .239.3.6 Multicast window .249.3.7 Spare window 259.3.8 Compatibility window 259.3.9 Wake-up window 259.4 Command alert (CA) 269.5 Frame and window parameters, summary . 2610 MAC commands .2810.1 General 2810.2 MAC commands related to the frame and window organization .29
13、 ISO 2015 All rights reserved iiiContents PageBS ISO 21214:2015ISO 21214:2015(E)10.2.1 Frame organization table (MC-FOT) 2910.2.2 When generated 3010.2.3 Effect on receipt .3010.2.4 Frame organization table update (MC-FOTU) .3010.2.5 Frame organization table steady (MC-FOTS) .3110.2.6 Submaster orga
14、nization table (MC-SOT) .3210.2.7 Get submaster area (MC-GSA) . 3310.2.8 Submaster status (MC-SST) . 3310.2.9 Submaster area confirmed (MC-SAC) 3410.2.10 Submaster area denied (MC-RESD) 3410.2.11 Broadcast (MC-BRC) 3410.2.12 Re-establish session (MC-REST) . 3510.2.13 Session re-establishment confirm
15、ed (MC-RESC) 3610.2.14 Session re-establishment denied (MC-RESD) 3610.2.15 Change master identifier (MC-CMI) .3610.2.16 Kill all (MC-KIA) .3710.2.17 Kill slave (MC-KIS) .3710.2.18 De-register (MC-DREG) . 3810.2.19 Suspend all (MC-SUA) .3910.2.20 Suspend slave (MC-SUS) . 3910.2.21 Free air time (MC-F
16、AT) 4010.2.22 Free air time (MC-FAT) 4010.2.23 Spare window (MC-SPW) 4110.2.24 Wakeup (MC-WU) 4110.3 MAC commands related to flow control . 4210.3.1 Busy (MC-BSY) 4210.3.2 Command not supported (MC-CNS) .4210.3.3 Token (MC-TKN) 4310.3.4 Block start (MC-BLS) .4310.3.5 Control channel block start (MC-
17、CCBS) 4410.3.6 IEEE frame block start (MC-FBS) 4410.3.7 Start of MAC control block (MC-SMC) .4510.3.8 Packet start (MC-PAS) 4510.3.9 Block start CRC16 (MC-BLS16) 4610.3.10 Packet start CRC16 (MC-PAS16) .4610.3.11 Packet end (MC-PAE) 4710.3.12 Block end (MC-BLE) .4710.3.13 Transmission acknowledged (
18、MC-TAck) 4810.3.14 Transmission acknowledged and (MC-TAck a new informative Annex F has been added Compatibility mode for MR-IR protocol and MR-IR protocol specification; minor textual clarifications have been made throughout the document. ISO 2015 All rights reserved viiBS ISO 21214:2015ISO 21214:2
19、015(E)IntroductionThis International Standard determines the air interface using infrared systems operating in the wavelength range at 850 nm.This International Standard is part of a family of International Standards for communications access for land mobiles (CALM) which specify a common architectu
20、re, 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 infrared communications, cellular second generation, cellular third generation, 5 GHz, millimetre, and mo
21、bile wireless broadband (MWB), over packet-based networks. It is anticipated that other air interfaces will be added in the future. Generally speaking, ISO 21217 is designed to include air interfaces that provide some subset of point-to-point, vehicle-to-vehicle, and vehicle-to-point communications
22、over packet-based networks in the ITS Sector. In particular, this International Standard provides general specifications for air interfaces designed to provide mobile access to packet-based networks.The requirements for transmission of information over comparatively large distances using wireless te
23、chnology are functionally very different from the requirements for European 5,8 GHz 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, etc. In
24、order to support such services, mobile units need to be able to communicate over longer ranges with access points/base stations and the system has to be able to hand over sessions from one access point/base station to another (horizontal or vertical). CALM standards are explicitly designed to enable
25、 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 c
26、ommunications 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 support
27、ed that include user preferences and media capabilities in making decisions as to which media to use for a particular session and when to handover between media or between service providers on the same medium. These handover mechanisms are defined within ISO 21217, ISO 21210, ISO 21218, and ISO 2410
28、2. Handovers between access points using the same technology and service provider use mechanisms that are defined within the particular medium-specific CALM International Standard.ITS applications that can be enhanced or are enabled by the CALM architecture includes car-to-car and point-to-multipoin
29、t safety messaging, collision avoidance, update of roadside 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
30、a few.This first revision takes into account and accommodates related CALM International Standards approved since the publication of the original version of this International Standard. Annex G provides a summary of the changes from the first published edition of this International Standard.viii ISO
31、 2015 All rights reservedBS ISO 21214:2015Intelligent transport systems Communications access for land mobiles (CALM) Infra-red systems1 ScopeThis International Standard determines the air interface using infrared systems at 820 nm to 1 010 nm.The International Standard provides protocols and parame
32、ters for medium range and medium to high speed wireless communications in the ITS sector using infrared systems.Such links are required for quasi-continuous, prolonged, or short communications between the following: vehicles and the roadside; between vehicles; between mobile equipment and fixed infr
33、astructure points; over medium and long ranges.Vehicles may be moving or stationary.Wherever practicable, this International Standard has been developed by reference to suitable extant International Standards, adopted by selection. Required regional variations are provided.Due account is given to, a
34、nd made use of, any relevant parts of appropriate communications systems such as Global Positioning Systems (GPS), Digital Audio Broadcasting (DAB), Digital Video Broadcasting (DVB), Radio Local Area Networks (RLANs), Digital Data Broadcasting (DDB), TETRA, FM subcarrier, Mobile Broadband Systems (M
35、BS, W-ATM), Internet Protocols, and DSRC.This International Standard supports data rates of 1 Mbit/s up to 128 Mbit/s (it may also support higher data rates), supports vehicle speeds to a minimum of 200 km/h (closing speeds could be double this value), defines or reference environmental parameters r
36、elevant to link operation, supports communication distances to 100 m (it may also support longer communication distances of 300 m to 1 000 m), supports latencies and communication delays in the order of milliseconds, is compliant to regional/national regulatory parameters, and may support other regi
37、onal/national parameters, as applicable.Application specific requirements are outside the scope of this International Standard. These requirements will be defined in the CALM management and upper layer standards and in application standards.Application specific upper layers are not included in this
38、International Standard but will be driven by application standards (which may not be technology specific).2 ConformanceSystems claiming conformance with this International Standard shall meet the specifications herein.INTERNATIONAL STANDARD ISO 21214:2015(E) ISO 2015 All rights reserved 1BS ISO 2121
39、4:2015ISO 21214:2015(E)3 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen
40、t (including any amendments) applies.For a list of related deliverables under concurrent development, see Bibliography.ISO/IEC 8802-11:1999, Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements Part 11: Wireless
41、 LAN Medium Access Control (MAC) and Physical Layer (PHY) specificationsIEC 60825-1, Safety of laser products Part 1: Equipment classification, requirements and users guide4 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 21217 and the following apply.4
42、.1 General terms and definitions4.1.1broadcast window BcWwindow (4.1.27) used to broadcast information to slaves, even to those who have not yet performed the “registration process”4.1.2chipsmallest information unit communicated over the linkNote 1 to entry: Depending on the chosen coding, one infor
43、mation bit may be represented by one or more consecutive chips.4.1.3communications profilespecific set of data rate, modulation, and flow control4.1.4communication zonespatial zone in which two CALM-IR units are able to communicate with acceptable performance4.1.5compatibility window CmpWwindow (4.1
44、.27) that enables non-CALM-IR systems that follow certain rules to co-exist with a CALM-IR system without harmful interference4.1.6default data ratedata rate used in the default communications profile (4.1.7) to determine the data rate if not otherwise specified4.1.7default communications profilecom
45、munications profile (4.1.3) used except where another communications profile is successfully negotiated2 ISO 2015 All rights reservedBS ISO 21214:2015ISO 21214:2015(E)4.1.8flush byte8 bit sequence used to denote the end of the main body of the information to be transmitted using the HHH (1,13) codin
46、g procedure4.1.9forward direction forward linkforward windowcommunication flow from master to slave4.1.10frame length indicator FLencode used to calculate the frame length from the last slot index4.1.11frame organisation tableFOTtable that carries all organisational data of the TDMA frame4.1.12free
47、air time indicatorFATIcode used to signal that “free air time” follows the current frameNote 1 to entry: This airtime may be used by units not being a slave of the current master to establish “secondary mastership”.4.1.13guard timeTGtime which precedes a command alert CA in certain cases in order to
48、 allow the automatic gain control of the receivers to re-settle4.1.14HHH (1,13) codespecial run length limited code with d=1 and k=13 used in the CALM-IR communications profiles 2 to 64.1.15management windowfirst window in a CALM-IR frame and carries all organisational information for the current fr
49、ame4.1.16master identifiercode which uniquely identifies a CALM-IR master4.1.17multicast windowMcWwindow (4.1.27) used for communication from master to multiple slaves, forward direction only4.1.18private window(s)window(s) (4.1.27) that carry the information exchange between a master and a specific slave4.1.19registration phasephase where a master identifies devices newly entering his communication zone ISO 2015 All rights reserved 3BS ISO 21214:2015ISO 21214:2015(E)4.1.20slavedevice that is under the control of anot
