BS-EN-12795-2003.pdf
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1、BRITISH STANDARD BS EN 12795:2003 Road transport and traffic telematics Dedicated Short Range Communication (DSRC) DSRC data link layer: medium access and logical link control The European Standard EN 12795:2003 has the status of a British Standard ICS 35.100.20; 35.240.60 ? Licensed Copy: sheffield
2、un sheffieldun, na, Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12795:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2003 BSI 30 May 2003 ISBN 0 580 41964 9 National foreword This British Standard is the
3、official English language version of EN 12795:2003. It supersedes DD ENV 12795:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee EPL/278, Road transport informatics, which has the responsibility to: A list of organizations represented on this commi
4、ttee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “S
5、earch” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal
6、 obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Sum
7、mary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 47 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheff
8、ieldun sheffieldun, na, Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12795 March 2003 ICS 35.100.20; 35.240.60Supersedes ENV 12795:1997 English version Road transport and traffic telematics - Dedicated Short Range Communication (
9、DSRC) - DSRC data link layer: medium access and logical link control Tlmatique de la circulation et du Transport routier - Communication courte porte - Couche de liaison de contrle daccs au mdia et de contrle logique de liaison This European Standard was approved by CEN on 4 December 2002. CEN membe
10、rs are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on applicatio
11、n to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same s
12、tatus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. E
13、UROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12795:2003 E Licensed Co
14、py: sheffieldun sheffieldun, na, Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12795:2003 (E) 2 Contents page Foreword3 1Scope5 2Normative references7 3Terms and definitions .7 4Abbreviations and variables.8 5Frame format10 6Address establishment.13 7Medium Access Control (MAC) s
15、ublayer15 8Logical Link Control sublayer26 Annex A (normative) Data link layer parameters.38 Annex B (informative) Data link layer overhead.39 Annex C (informative) Evolution of the MAC sequence bit.40 Annex D (informative) Address establishment.42 Annex E (informative) A-deviations.47 Licensed Copy
16、: sheffieldun sheffieldun, na, Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12795:2003 (E) 3 Foreword This document (EN 12795:2003) has been prepared by Technical Committee CEN TC 278 “Road Transport and Traffic Telematics”, the secretariat of which is held by NEN. This European
17、 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2003, and conflicting national standards shall be withdrawn at the latest by September 2003. This document supersedes ENV 12795:1997. The development o
18、f this standard was carried out under European Commission Mandate M/018. This European Standard forms part of a series of European Standards defining the framework of a Dedicated Short Range Communication (DSRC) link in the Road Transport and Traffic Telematics (RTTT) environment. The communication
19、requirements of many RTTT applications can be fulfilled by DSRC. The DSRC standards enable compliant communication systems to serve multiple RTTT applications in parallel. The small service areas and severe real-time constraints require a specific protocol architecture leading to the reduced protoco
20、l stack shown in Figure A, consisting of the Application Layer, the Data Link Layer, and the Physical Layer. Such architecture is very common for real-time environments. This European Standard gives the architecture and services offered by the DSRC Data Link Layer. Figure A DSRC protocol stack The f
21、ollowing set of European Standards for the DSRC link is issued by CEN: EN 12253 “DSRC Physical Layer using Microwave at 5.8 GHz”; EN 12795 “DSRC Data Link Layer: MAC and LLC” (this European Standard); EN 12834 “DSRC Application Layer“ ; EN 13372 “DSRC Profiles for RTTT Applications“. Annex A is norm
22、ative. Annexes B, C, D and E are informative. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12795:2003 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to
23、 implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na,
24、 Sat Oct 28 05:00:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12795:2003 (E) 5 1 Scope This European Standard: defines the Data Link Layer of DSRC; is positioned with respect to other related standards by the layers defined in OSI Basic Reference Model EN ISO/IEC 7498-1 as adopted for DSRC; sup
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