1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10681-1:2010Road vehicles Communication on FlexRayPart 1: General information and use casedefinitionBS ISO 10681-1:2010 BRITISH STANDARDNational forewordThis British Stand
2、ard is the UK implementation of ISO 10681-1:2010.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport
3、to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 62868 9ICS 43.040.15Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards P
4、olicy and Strategy Committee on 31 July 2010Amendments issued since publicationDate Text affectedBS ISO 10681-1:2010Reference numberISO 10681-1:2010(E)ISO 2010INTERNATIONAL STANDARD ISO10681-1First edition2010-06-15Road vehicles Communication on FlexRay Part 1: General information and use case defin
5、ition Vhicules routiers Communication par FlexRay Partie 1: Informations gnrales et dfinitions du cas dutilisation BS ISO 10681-1:2010ISO 10681-1:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but sh
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10、09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 10681-1:2010ISO 10681-1:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO m
11、ember bodies). The 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, governm
12、ental and non-governmental, 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 Dir
13、ectives, Part 2. The 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 bo
14、dies 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 responsible for identifying any or all such patent rights. ISO 10681-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcom
15、mittee SC 3, Electrical and electronic equipment. ISO 10681 consists of the following parts, under the general title Road vehicles Communication on FlexRay: Part 1: General information and use case definition Part 2: Communication layer services BS ISO 10681-1:2010ISO 10681-1:2010(E) iv ISO 2010 All
16、 rights reservedIntroduction This part of ISO 10681 is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in ISO/IEC 7498 and ISO/IEC 10731, which structures communication systems into seven layers (see example in Table 1). When mapped on this model, ISO 10681 incorporat
17、es the network layer (layer 3) and the transport layer (layer 4) services as communication layer services. The ISO 10681 document set provides an implementer with all documents and references required to support the communication implementation on FlexRay networks. ISO 10681-1: General information a
18、nd use case definition (this part), provides an overview of the document set along with the use case definitions and a common set of resources (definitions, references) for use by all subsequent parts. ISO 10681-2: Communication layer services specifies a communication protocol to meet the requireme
19、nts of FlexRay-based vehicle network systems as specified in the FlexRay Communications Systems Protocol Specification. NOTE Additional parts of ISO 10681 will be introduced as necessary. Table 1 Example of enhanced diagnostic specifications according to the OSI layers Applicability OSI layers Vehic
20、le manufacturer enhanced diagnostics Application layer ISO 14229-1 Presentation layer N/A Session layer ISO 14229-2 Transport layer Network layer ISO 10681-2 Data link layer FlexRay Communications Systems Protocol Specification Seven layer according to ISO/IEC 7498-1 and ISO/IEC 10731 Physical layer
21、 FlexRay Communications System Electrical Physical Layer Specification BS ISO 10681-1:2010INTERNATIONAL STANDARD ISO 10681-1:2010(E) ISO 2010 All rights reserved 1Road vehicles Communication on FlexRay Part 1: General information and use case definition 1 Scope This part of ISO 10681 defines common
22、requirements for vehicle systems implemented on a FlexRay communication link, as specified in the FlexRay Communications Systems Protocol Specification. It also describes general use cases and communication scenarios that are covered by FlexRay transport and network layer. Each use case drives speci
23、fic communication capabilities and requirements of the vehicle communication interface. 2 Normative references The 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 o
24、f the referenced document (including any amendments) applies. ISO/IEC 7498-1, Information technology Open Systems Interconnection Basic Reference Model: The Basic Model 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 7498-1 and the following appl
25、y. 3.1 communication layer CL layer that includes the network layer (layer 3) and the transport layer (layer 4) 4 Use case definitions and requirements 4.1 Overview The following subclauses provide an overview of all the kinds of reasonable communication use cases. 4.2 Identified use cases 4.2.1 Use
26、 case 1: Multipurpose communication layer The communication layer shall be able to handle various message transmission types such as Diagnostics, Multi Media or Inter ECU communication. However, usage purposes are not limited to the ones stated above. BS ISO 10681-1:2010ISO 10681-1:2010(E) 2 ISO 201
27、0 All rights reserveda) Transmit messages with known data length: Message transmission where the length of the transmitted message is known by the application. This kind of feature applies to most known applications (e.g. ECU programming, diagnostics, etc.). b) Transmit messages with unknown but fin
28、ite data length: The final message length is unknown at start of message transmission. However, the data shall be finite in order to keep the transport layer implementation manageable. The feature might be used for any data streaming applications. c) Additional acknowledgement with retry mechanism:
29、A message transmission is acknowledged (positive / negative) once it is completed. In addition, a retry mechanism might be supported, where the message transmission is being repeated at the detected first wrong byte position. This feature might be used for, e.g., Inter ECU communication mechanism. d
30、) Routing data on the fly: Gateway mechanism, where the data are already transmitted onto the target subnet, while it is still in the process of being received on the source subnet. e) Support of dynamic frame length: Variable payload length (PDU_Size) in a single FlexRay frame, e.g. for optimized g
31、ateway handling in regard of buffer requirements. Possible applications could be “routing data on the fly” or “data streaming”. 4.2.2 Use case 2: Optimize flash programming time a) Flexible bandwidth usage: Achieve optimized message transmission independent of the given network bandwidth assignment.
32、 b) Support of parallel diagnostic communication: The communication layer shall be capable to support concurrent ECU programming events. 4.2.3 Use case 3: Optimize gateway implementations a) Routing data on the fly: See d) in use case 1 (4.2.1). b) Receive and forward: Allow to transfer a message fr
33、om a given network onto FlexRay (and vice versa) without re-mapping payload information of a frame, where only the PCI information needs to be adapted. c) Optimize addressing scheme: See d) in use case 1 (4.2.1). 4.2.4 Use case 4: Communication layer definition The communication layer definition sha
34、ll be independent of static or dynamic segment usage as far as possible. BS ISO 10681-1:2010ISO 10681-1:2010(E) ISO 2010 All rights reserved 3Bibliography 1 ISO/IEC 10731, Information technology Open Systems Interconnection Basic Reference Model Conventions for the definition of OSI services 2 ISO 1
35、4229-11), Road vehicles Unified diagnostic services (UDS) Part 1: Specification and requirements 3 ISO 14229-22), Road vehicles Unified diagnostic services (UDS) Part 2: Session layer services 4 ISO 14229-42), Road vehicles Unified diagnostic services (UDS) Part 4: Unified diagnostic services on Fle
36、xRay implementation (UDSonFR) 5 FlexRay Communications System Protocol Specification 1) Under preparation. (Revision of ISO 14229-1:2006) 2) Under preparation. BS ISO 10681-1:2010ISO 10681-1:2010(E) ICS 43.040.15 Price based on 3 pages ISO 2010 All rights reserved This page deliberately left blankBS
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