ISO/IEC 14908-1:2012

INTERNATIONAL ISO/IEC
STANDARD 14908-1
First edition
2012-11-01
Information technology — Control
network protocol —
Part 1:
Protocol stack
Technologies de l'information — Protocole de réseau de contrôle —
Partie 1: Pile de protocole
Reference number
©
ISO/IEC 2012
©  ISO/IEC 2012
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ii © ISO/IEC 2012 — All rights reserved

- 1 - 14908-1 © ISO/IEC:2012 (E)
Contents          page
Foreword . 7
Introduction . 8
1  Scope . 9
2  Normative references . 9
3  Terms and definitions . 9
4  Symbols and abbreviations . 11
4.1  Symbols and graphical representations . 11
4.2  Abbreviations . 12
5  Overview of protocol layering . 13
6  MAC sublayer . 15
6.1  Service provided . 15
6.2  Interface to the link layer . 15
6.3  Interface to the physical layer . 16
6.4  MPDU format . 17
6.5  Predictive p-persistent CSMA — overview description . 17
6.6  Idle channel detection . 18
6.7  Randomising . 19
6.8  Backlog estimation . 19
6.9  Optional priority . 20
6.10  Optional collision detection . 21
6.11  Beta1, Beta2 and Preamble Timings . 21
7  Link layer . 23
7.1  Assumptions . 23
7.2  Service provided . 24
7.3  CRC . 24
7.4  Transmit algorithm . 25
8  Network layer . 26
8.1  Assumptions . 26
8.2  Service provided . 27
8.3  Service interface . 27
8.4  Internal structuring of the network layer . 28
8.5  NPDU format . 28
8.6  Address recognition . 29
8.7  Routers . 29
8.8  Routing algorithm . 30
8.9  Learning algorithm — subnets . 30
9  Transaction control sublayer . 30
9.1  Assumptions . 30
9.2  Service provided . 31
9.3  Service interface . 31
9.4  State variables . 31
9.5  Transaction control algorithm . 32
10  Transport layer . 32
10.1  Assumptions . 32
10.2  Service provided . 32
10.3  Service interface . 33
10.4  TPDU types and formats . 33

14908-1 © ISO/IEC:2012 (E) - 2 -
10.5  Protocol diagram . 35
10.6  Transport protocol state variables . 35
10.7  Send algorithm . 35
10.8  Receive algorithm . 36
10.9  Receive transaction record pool size and configuration engineering . 36
10.9.1  General . 36
10.9.2  Number of retries . 36
10.9.3  Transport layer timers. 37
11  Session layer . 38
11.1  Assumptions . 38
11.2  Service Provided . 38
11.3  Service interface . 39
11.4  Internal structure of the session layer . 40
11.5  SPDU types and formats . 41
11.6  Protocol timing diagrams . 42
11.7  Request-response state variables . 44
11.8  Request-response protocol — client part . 45
11.9  Request-response protocol — server part . 45
11.10  Request-response protocol timers . 45
11.11  Authentication protocol . 46
11.12  Encryption algorithm . 46
11.13  Retries and the role of the checksum function . 46
11.14  Random Number Generation . 47
11.15  Using Authentication . 47
12  Presentation/application layer . 47
12.1  Assumptions . 47
12.2  Service provided . 47
12.3  Service interface . 48
12.4  APDU types and formats . 49
12.5  Protocol diagrams . 50
12.6  Application protocol state variables . 51
12.7  Request - response messaging in offline state . 51
12.8  Network variables . 52
12.8.1  General . 52
12.8.2  Network variable processing . 52
12.9  Error notification to the application program . 53
12.9.1  General . 53
12.9.2  Error notification for messages . 53
12.9.3  Error notification for network variables . 53
13  Network management & diagnostics . 53
13.1  Assumptions . 53
13.2  Services provided . 54
13.3  Network management and diagnostics application structure . 54
13.4  Node states . 54
13.5  Using the network management services. 55
13.5.1  General . 55
13.5.2  Addressing considerations . 55
13.5.3  Making network configuration changes . 56
13.5.4  Downloading an Application Program . 56
13.5.5  Error handling conditions (informative) . 56
13.6  Using router network management commands . 59
13.7  NMPDU formats and types .
...