SAE J2366-4-2002 ITS Data Bus.Thin Transport Layer.pdf
《SAE J2366-4-2002 ITS Data Bus.Thin Transport Layer.pdf》由会员分享,可在线阅读,更多相关《SAE J2366-4-2002 ITS Data Bus.Thin Transport Layer.pdf(23页珍藏版)》请在三一文库上搜索。
1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER: +1 (724) 776-4970 FAX: +1 (724) 776-0790 SAE WEB ADDRESS h
3、ttp:/www.sae.org Copyright 2002 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE J2366-4 ISSUED MAR2002 Issued2002-03 ITS Data BusThin Transport Layer TABLE OF CONTENTS 1.Scope. 2 2.Refe
4、rences. 3 2.1Applicable Documents3 2.1.1SAE Publications 3 2.1.2CAN Publication.3 2.2Related Publications. 3 2.2.1SAE Publications 3 2.2.2ISO Publication. 4 3.Definitions.4 3.1ACK 4 3.2AMH . 4 3.3AML 4 3.4Bit . 4 3.5Clear. 4 3.6Dominant 4 3.7Frame . 4 3.8Frame Group 4 3.9IDB . 4 3.10ITS 4 3.11NACK o
5、r NAK. 4 3.12Node. 4 3.13Octet . 4 3.14OEM . 4 3.15OSI . 4 3.16Out Of Band . 4 3.17PDU (Protocol Data Unit). 4 3.18Recessive.4 3.19Set 4 3.20TTC 5 3.21TTD 5 3.22Time Intervals. 5 3.22.1Frame Group Acknowledge Timer, TMaxAck. 5 SAE J2366-4 Issued MAR2002 -2- 3.22.2Inactivity Timer, TInactivity5 3.22.
6、3Frame Group Timer, TFrameGroup5 4.Protocol Overview.5 4.1Basic Concepts.5 4.2Frame Format Overview.6 4.3Frame Elements .6 4.3.1Data Frame Elements.6 4.3.2Control Frame Elements .12 4.4Frame Grouping, Acknowledgement, and Resynchronization15 4.4.1Frame Grouping15 4.4.2Positive Acknowledgement .16 4.
7、4.3Negative Acknowledgement .17 4.4.4Resynchronization 18 4.5Data Frame Type Usage 18 4.5.1Use of DATAFRAMESINGLE Frame .18 4.5.2Use of DATAFRAMESTART, DATAFRAMECONT, DATAFRAMEEND, and DATAFRAMERESYNC Frames .18 4.6Message Data Ordering19 4.7Transport Layer Primitives19 4.7.1Primitives Invoked by Up
8、per Layers .19 4.7.2Primitives Invoked by SAE J2366-420 4.7.3Primitives Invoked by Lower Layers .21 4.8Transport Level Diagnostics .22 4.8.1BrdcastMsgErrCntr.22 4.8.2NAKRcvCntr .22 4.8.3NAKTxCntr22 Figure 1Scope of SAE J2366-4 .3 Figure 2SAE J2366-4 Frame Formats .6 Figure 3TTL Frame Elements 7 Figu
9、re 4TTL DATAFRAMESTART Frame Elements 7 Figure 5TTL DATAFRAMECONT Frame Elements9 Figure 6TTL DATAFRAMEEND Frame Elements10 Figure 7TTL DATAFRAMESINGLE Frame Element .11 Figure 8TTL DATAFRAMERESYNC Frame Elements .12 Figure 9TTL ACK Frame Elements13 Figure 10TTL NAK Frame Elements14 Table 1Frame Typ
10、es.6 Table 2Transport Error Codes15 Table 3NAKAddinfo, Additional information for NAKReasonCode.15 1.ScopeThis SAE Recommended Practice details the Thin Transport Layer of the Intelligent Transportation Systems (ITS) Data Bus, which is generally intended for in-vehicle use. The Thin Transport Layer
11、sits between SAE J2366-2 and J2366-7. It provides the handling of such activities as the packetizing of long messages and message reassembly. Design of the messages and headers has stressed economy, in terms of bits within a CAN 2.0B frame. The ITS Data Bus (IDB) is a non-proprietary virtual token p
12、assing bus, designed to allow disparate consumer, vehicle, and commercial electronic components to communicate and share information across a standard, open data bus. This document describes the Thin Transport Layer of the IDB, as shown in Figure 1. SAE J2366-4 Issued MAR2002 -3- FIGURE 1SCOPE OF J2
13、366-4 2.References 2.1Applicable PublicationsThe following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, http:/ www.sae.org.
14、SAE J2355ITS Data Bus Architecture Reference Model Information Report SAE J2366-2ITS Data BusLink Layer SAE J2366-7ITS Data BusApplication Message Layer 2.1.2CAN PUBLICATIONAvailable from Robert Bosch GmbH, Postfach 50, D-7000 Stuttgart 1, Germany CAN Specification, Version 2.0 2.2Related Publicatio
15、nsThe following publications are provided for information purposes only and are not a required part of this document. 2.2.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, http:/ www.sae.org. SAE J1760IDB Data Security Services (Under Development at time of this
16、 documents publication) SAE J2366-1ITS Data BusPhysical Layer SAE J2590PMODE for In-Vehicle Networks SAE J2366-4 Issued MAR2002 -4- 2.2.2ISO PUBLICATIONAvailable from ISO ISO 7498:1990Information processing systemsOpen system interconnectBasic reference model 3.Definitions 3.1ACKThis term is used to
17、 describe a positive acknowledgement or message indicating positive acknowledgement. An ACK indicates that an amount of information has been verified as correctly received. 3.2AMHIDB Application Message Layer Header. 3.3AMLSAE J2366-7 Application Message Layer. 3.4BitA signaling unit or unit of data
18、 transmission of minimal length. It can hold either the value 0B or 1B. 3.5ClearThe word “clear” is used in referring to one or more bits to indicate that they each have a value of 0B. This is also referred to as “dominant” in CAN 2.0B terminology. 3.6DominantA term defined in CAN 2.0B to indicate a
19、 data bit with a value of 0B. 3.7FrameAn ordered sequence of bits, used to communicate information between the Transport Layers of IDB Nodes. 3.8Frame GroupAn ordered sequence of up to 16 frames, grouped for purposes of acknowledgement. 3.9IDBThe ITS Data Bus. This document describes the Thin Transp
20、ort Layer protocol for the IDB. 3.10 ITSIntelligent Transportation Systems 3.11 NACK or NAKThis term is generally used to describe a negative acknowledgement or message indicating negative acknowledgement. A NAK indicates that an amount of information has been detected as incorrectly received. 3.12
21、NodeA Node is a device on the IDB with at least one physical Node ID. 3.13 OctetAn octet is a unit of data transmission that consists of 8 bits. On most commonly used microprocessors, such an 8-bit quantity is commonly referred to as a “byte”. The bits within an octet may be subdivided and/or groupe
22、d, to provide specific meanings. 3.14 OEMOEM is an acronym for Original Equipment Manufacturer. In this document it refers to the manufacturer of a vehicle. 3.15 OSIOfficially known as the “ISO Reference Model of Open System Interconnection”. It refers to a model, or way of thinking about communicat
23、ion protocols as being divided into (usually) seven distinct layers. 3.16 Out Of BandThis term refers to a data transfer event that is occurring outside of the normal operation of the Transport Layer. An example of such an event is the transmission of an “Out Of Band” message from a sender to a rece
24、iver during the regular transmission of a standard message from the same sender to the same receiver. It is also used to describe information that is passed between protocol layers without being encoded in the header or PDU. 3.17 PDU (Protocol Data Unit)Message packets exchanged between two protocol
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- SAE J2366-4-2002 ITS Data Bus.Thin Transport Layer J2366 2002 Bus Thin
链接地址:https://www.31doc.com/p-3678369.html