OSEK网络管理规范（2.5.3）

OSEK

2.5.3

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OSEK/VDX

Open Systems and the Corresponding Interfaces

for Automotive Electronics

Page 1 © by OSEK/VDX NM Concept & API 2.5.2

OSEK/VDX

Network Management

Concept and Application Programming Interface

Version 2.5.3

July 2004

This document is an official release and replaces all previously distributed documents. The OSEK

group retains the right to make changes to this document without notice and does not accept liability

means, without permission in writing from the OSEK/VDX steering committee.

OSEK/VDX

Open Systems and the Corresponding Interfaces

for Automotive Electronics

Page 2 © by OSEK/VDX NM Concept & API 2.5.2

Table of Contents

Introduction.................................................................................................................................3

Summary.....................................................................................................................................4

1. Scope of the OSEK Network Management ........................................................................5

2. Direct Network Management..............................................................................................7

2.1. Concept .......................................................................................................................7

2.1.1. Node Monitoring.................................................................................................7

2.1.2. Addressing ..........................................................................................................8

2.1.3. NM Infrastructure for Data Exchange ..............................................................10

2.1.4. 2.1.4.Standard Functionality.............................................................................10

2.1.5. Configuration Management ..............................................................................10

2.1.6. Operating Modes...............................................................................................13

2.1.7. Network Error Detection and Treatment ..........................................................14

2.1.8. Support of Diagnostic Application ...................................................................15

2.2. Algorithms and Behavior..........................................................................................15

2.2.1. Communication of the Network Management System.....................................15

2.2.2. NM Infrastructure for Data Exchange ..............................................................19

2.2.3. Standard Tasks..................................................................................................20

2.2.4. Configuration Management ..............................................................................23

2.2.5. Example: Skipped in the logical ring................................................................32

2.2.6. Example: Logical Successor.............................................................................33

2.2.7. Operating Mode ................................................................................................34

2.2.8. Fusion of Configuration Management and Operating Modes ..........................40

2.2.9. Alarms inside the Network Management .........................................................57

3. Indirect Network Management .........................................................................................60

3.1. Concept .....................................................................................................................61

3.1.1. Node Monitoring...............................................................................................61

3.1.2. Configuration-Management..............................................................................62

3.1.3. Standard Task....................................................................................................62

3.1.4. Monitoring Mechanisms...................................................................................63

3.1.5. Monitoring time-outs ........................................................................................65

3.1.6. Operating Modes...............................................................................................67

3.2. Algorithms and behavior...........................................................................................67

3.2.1. Configuration Management ..............................................................................67

3.2.2. Operating Mode ................................................................................................71

3.2.3. State Machine in SDL.......................................................................................73

OSEK/VDX

Network Management

Concept and Application Programming

Interface

Page 2 © by OSEK/VDX NM Concept & API 2.5.2

4. System generation and API...............................................................................................85

4.1. Overview...................................................................................................................85

4.2. Conventions for Service Description........................................................................87

4.2.1. System Generation............................................................................................87

4.2.2. Type of Calls.....................................................................................................87

4.2.3. Error Characteristics .........................................................................................87

4.2.4. Structure of the Description..............................................................................88

4.3. General Data Types...................................................................................................89

4.4. Common services......................................................................................................89

4.4.1. Standard Functionality......................................................................................89

4.4.2. Configuration Management ..............................................................................92

4.4.3. Operating Modes and Operating Mode Management.......................................98

4.5. Services for direct NM............................................................................................102

4.5.1. Standard Functionality....................................................................................102

4.5.2. Operating Modes and Operating Mode Management.....................................102

4.5.3. Data Field Management..................................................................................103

4.6. Services for indirect NM.........................................................................................106

4.6.1. Standard functionality.....................................................................................106

4.6.2. Configuration Mangement..............................................................................106

5. Impacts upon OS, COM and the data link layer.............................................................107

5.1. Error Codes .............................................................................................................107

5.2. Common impacts ....................................................................................................108

5.2.1. Requirements of the data link layer ................................................................108

5.2.2. Requirements of OSEK Operating System (OSEK OS).................................110

5.3. Impacts from direct NM..........................................................................................111

5.3.1. Interface to the data link layer ........................................................................111

5.4. Impacts from indirect NM.......................................................................................112

5.4.1. Interface to OSEK Communication (OSEK COM)........................................112

6. History.............................................................................................................................115

7. Implementation proposal (direct NM) ............................................................................116

7.0.1. Overview of Internal Activities ......................................................................116

7.0.2. Specification of Internal Activities.................................................................119

7.0.3. NMPDU ..........................................................................................................124

7.0.4. Scalability .......................................................................................................129

7.1. Implementation proposal (indirect NM).................................................................131

7.1.1. Scalability .......................................................................................................131

7.1.2. Implementation hints ......................................................................................132

7.1.3. Summary of SDL state diagram graphical notation........................................134

7.2. Outlook ...................................................................................................................135

8. Index ...............................................................................................................................137

OSEK/VDX

Network Management

Concept and Application Programming Interface

Introduction

There is an increasing tendency for electronic control units (ECUs) made by different

manufacturers to be networked within vehicles by serial data communication links.

Therefore, standardization of basic and non-competitive infrastructure in ECUs aims at

avoiding the design of unnecessary variants and saving development time.

In the scope of the OSEK/VDX co-operation, the Network Management system (NM)

provides standardized features which ensure the functionality of inter-networking by

standardized interfaces.

The essential task of NM is to ensure the safety and the reliability of a communication

network for ECUs.

In a vehicle a networked ECU is expected to provide certain features:

• each node has to be accessible for authorized entities

• maximum tolerance with regard to temporary failures

• support of network related diagnostic features.

At a basic configuration stage, NM implementations complying with OSEK specifications

must be implemented in all networked nodes. This implies a solution for NM which can be

implemented throughout the broad range of available hardware offered in today's ECUs.

Therefore, the status of the network must be recorded and evaluated uniformly at all ECUs at

intervals. Thus each node features a determined behavior as regards the network and the

application concerned.

OSEK NM offers two alternative mechanisms for network monitoring

• indirect monitoring by monitored application messages, and

• direct monitoring by dedicated NM communication using token principle.

However, the use of these mechanisms is up to the system responsible. Processing of

information collected by these mechanisms must be in accordance with requirements as

regards to the entire networked system.

System status

In view of the application, NM comprises two standardized interfaces:

• Software: Application program <-> NM

• Network behavior: Station <-> Communication medium

The resulting entire system is open. Thus, it can adapt to new requirements within the

restrictions defined by the system design.

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