International ISO Standard IS0 17987-2 Second edition Road vehicles Local Interconnect 2025-06 Network (LIN) - Part 2: Transport protocol and network layer services Véhicules routiers — Réseau Internet local (LIN) - Partie 2: Protocole de transport et couches de services réseau Reference number IS0 17987-2:2025(en) @ ISO 2025 IS0 17987-2:2025(en) COPYRIGHT PROTECTED DOCUMENT @ IS0 2025 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 address below or ISO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2025 - All rights reserved ii IS0 17987-2:2025(en) Contents Page Foreword. .. vi Introduction ..vii Scope. 1 .1 ..2 2 Normative references 2 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions 3.2 Symbols. ..3 3.3 Abbreviated terms ..4 4 Conventions. 5 Network management. 5.1 Network management general information ..5 5.2 LIN node communication state diagram 5.3 Wake up ..6 5.3.1 Wake up general information ..6 5.3.2 Commander generated wake up. .6 Responder generated wake up. 5.3.3 .6 5.4 Go-to-sleep.. Network layer overview. .8 6 6.1 General. ..8 6.2 Format description of network layer services 6.3 Internal operation of network layer .9 6.4 Service data unit specification. .10 6.4.1 General. ..10 6.4.2 N_AI, address information .10 6.4.3 ..11 <Length> 6.4.4 <MessageData> .11 6.4.5 <N_Result> 6.5 Services provided by network layer to higher layers .12 ..12 6.5.1 Specification of network layer service primitives N_USData.request.. ..13 6.5.2 6.5.3 N_USData.confirm .13 6.5.4 N_USData_FF.indication ..13 6.5.5 N_USData.indication... .14 Transport layer protocol 14 7.1 Protocol functions. ..14 7.2 Single frame transmission. ..14 7.3 ..15 Multiple frame transmission Transport layer protocol data units 7.4 ..17 7.4.1 Protocol data unit types ..17 7.4.2 SF N PDU ..17 7.4.3 FF N_PDU .17 7.4.4 CF N_PDU ..17 7.4.5 Protocol data unit field description .17 7.5 Protocol control information specification .18 7.5.1 N_PCI .18 7.5.2 SingleFrame N_PCI parameter definition ..19 7.5.3 FirstFrame N_PCI parameter definition. 20 7.5.4 ConsecutiveFrame N_PCI parameter definition 20 Network layer timing. .21 7.6 .21 7.6.1 Timing constraints.. .25 7.6.2 Network layer timeouts 7.6.3 Network layer error handling. 25 @ IS0 2025 - All rights reserved iii IS0 17987-2:2025(en) 7.6.4 Unexpected arrival of N_PDU. 26 Data link layer usage 8 27 .27 8.1 General. 8.2 Data link layer service parameters .27 8.3 Data link layer interface services 28 8.3.1 28 L_Data.request 8.3.2 L_Data.confirm 28 8.3.3 L_Data.indication 28 8.4 Mapping of the N_PDU fields 28 8.5 Transport layer PDU structure and communication 29 PDU structure. 29 8.5.1 8.5.2 Communication. .32 Diagnostic communication requirements. 32 9 9.1 Definition of diagnostic classes .32 9.1.1 .32 General 9.1.2 .32 Diagnostic class I 9.1.3 Diagnostic class II. .32 9.1.4 Diagnostic class III .32 9.1.5 Summary of responder node diagnostic classes 33 9.2 Diagnostic messages. 33 9.3 Using the transport layer. 33 9.4 Responder node diagnostic timing requirements 35 9.5 Response pending. 36 9.6 Transport protocol handling in commander node .37 9.6.1 .37 General 9.6.2 Diagnostic request schedule .37 9.6.3 Diagnostic response schedule 38 ..38 9.6.4 Diagnostic schedule execution.. Transmission handler requirements. 9.7 .43 9.7.1 .43 General 9.7.2 Commander node transmission handler ..43 9.7.3 Responder node transmission handler .46 9.8 Diagnostic service prioritization .48 .48 10 LIN node capability