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//-->FLEXRAY AND ITSAPPLICATIONSFLEXRAY AND ITSAPPLICATIONSREAL TIME MULTIPLEXEDNETWORKDominique Paretdp-Consulting, Paris, FranceTranslated by Bill ChilcottFellow of the Institute of Translation and InterpretingClaygate, Esher, UKA John Wiley & Sons, Ltd., PublicationThis edition first published 2012©2012 John Wiley & Sons, Ltd.,The original French version published 2011 by Dunod, ParisRegistered officeJohn Wiley & Sons Ltd., The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, United KingdomFor details of our global editorial offices, for customer services and for information about how to apply for permission toreuse the copyright material in this book please see our website at www.wiley.com.The rights of the author to be identified as the author of this work has been asserted in accordance with the Copyright,Designs and Patents Act 1988.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in anyform or by any means, electronic, mechanical, photocopying, recording or otherwise, except as permitted by the UKCopyright, Designs and Patents Act 1988, without the prior permission of the publisher.Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be availablein electronic books.Designations used by companies to distinguish their products are often claimed as trademarks. All brand names andproduct names used in this book are trade names, service marks, trademarks or registered trademarks of their respectiveowners. The publisher is not associated with any product or vendor mentioned in this book. This publication is designedto provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understandingthat the publisher is not engaged in rendering professional services. If professional advice or other expert assistance isrequired, the services of a competent professional should be sought.Vector Informatik Gmbh – Stuttgart, Vector France SAS – Paris and NXP Semiconductors own the copyright to theirimages in this book.Illustrations by Alain and Ursula Bouteveille-Sanders and Rapha¯ lle DaneteLibrary of Congress Cataloging-in-Publication DataParet, Dominique.[FlexRay et ses applications. English]FlexRay and its applications : real time multiplexed network / Dominique Paret.p. cm.Includes bibliographical references and index.ISBN 978-1-119-97956-2 (hardback)1. FlexRay (Computer network protocol) 2. Motor vehicles–Electronic equipment. 3. Motor vehicles–Automaticcontrol. 4. Automotive computers. 5. Adaptive control systems. I. Title.TL272.53.P3713 2012629.2 72 – dc232011044311A catalogue record for this book is available from the British Library.Print ISBN: 9781119979562Typeset in 10/12pt Times-Roman by Laserwords Private Limited, Chennai, IndiaContentsPrefaceList of AbbreviationsPart A ‘SECURE REAL TIME’ APPLICATIONS11.11.2Reminders about the CAN ProtocolThe Limitations of CAN‘Event-Triggered’ and ‘Time-Triggered’ Aspects1.2.1The Probabilistic Side of CAN1.2.2The Deterministic Side of ApplicationsThe TTCAN ProtocolTTCAN – ISO 11898-4Session LayerPrinciple of Operation of TTCANEmergence of ‘X-by-Wire’ SystemsHigh Throughput and X-by-WireRedundancyHigh-Level Application Requirements3.3.1The Number of Communication Systems is Growing3.3.2The Electronic Architecture Must be Commonto Several Vehicle Platforms3.3.3Some Things the Architecture of the CommunicationNetwork and the Nodes Must AllowHigh-Level Functional Requirements3.4.1Speed of Communication3.4.2Physical Layer3.4.3Access to and Management of the Medium3.4.4Synchronisation Method3.4.5Network Topologies3.4.6Requirements at System Level3344577881111111313131414141515151616xiiixvii22.12.22.333.13.23.33.4viContentsPart B THE FLEXRAY CONCEPT AND ITS COMMUNICATIONPROTOCOL44.14.24.34.4The Genesis of FlexRayThe TTP/C ProtocolFlexRay4.2.1The Genesis of FlexRayThe FlexRay ConsortiumThe Aim of FlexRay4.4.1A Flex(ible) Configuration4.4.2SolutionsFlexRay and Real TimePhysical TimeLocal Time5.2.1Local Clock5.2.2‘Clock Tick’ and Microticks5.2.3In PracticeGlobal View at Network Level – Global Time5.3.1Concept of Global Time5.3.2Macrotick (MT)5.3.3And the Bit Time – What’s Happening to it Inside There?Summarising: Time and its Hierarchies in FlexRayThe FlexRay ProtocolHistoryGeneral – Channels, Cycles, Segments and Slots6.2.1Philosophy of the Protocol6.2.2Hierarchy and Overall Form of FlexRay CommunicationChannels and Cycles6.3.1Communication Channel(s)6.3.2Communication CycleSegments6.4.1A Little Philosophy about Static and Dynamic Segmentsand Their Purposes6.4.2Slots and Minislots6.4.3Static Segments and Slots6.4.4Dynamic Segments and Minislots6.4.5SummaryCommunication Frames6.5.1Overview of Frames6.5.2Common Constituent Parts of Static and Dynamic Frames6.5.3Encapsulation and Coding of Frames of Logical Datain Slots and Minislots6.5.4. . .for Frames which are Transported during Staticand Dynamic Segments191920202023232329293030303132323335364141414243444444474849535557575858626455.15.25.35.466.16.26.36.46.5 [ Pobierz całość w formacie PDF ]