1、 Reference number ISO/IEC 14908-1:2012(E) ISO/IEC 2012INTERNATIONAL STANDARD ISO/IEC 14908-1 First edition 2012-11-01 Information technology Control network protocol Part 1: Protocol stack Technologies de linformation Protocole de rseau de contrle Partie 1: Pile de protocole ISO/IEC 14908-1:2012(E)
2、COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the addre
3、ss below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2012 All rights reserved - 1 - 14908-1 ISO/IEC:2012 (E) C o n
4、t e n t s 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 Interfac
5、e 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 a
6、nd 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 recognit
7、ion 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 Se
8、rvice 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 .
9、 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.
10、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 11.1
11、4 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 - respons
12、e 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
13、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 ch
14、anges 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 . 60 13.7.1 General . 60 13.7.2 Query ID 60 13.7.3 Respond to query 61 13.7.4 Update domain . 61 13.7.5 Leave domain
15、 . 61 13.7.6 Update key . 61 - 3 - 14908-1 ISO/IEC:2012 (E) 13.7.7 Update address 62 13.7.8 Query address . 62 13.7.9 Query network variable configuration . 62 13.7.10 Update group address 62 13.7.11 Query domain 62 13.7.12 Update network variable configuration . 62 13.7.13 Set node mode . 63 13.7.1
16、4 Read memory . 63 13.7.15 Write memory . 63 13.7.16 Checksum recalculate. 63 13.7.17 Install 64 13.7.18 Memory refresh 78 13.7.19 Query SI 78 13.7.20 Network variable value fetch 79 13.7.21 Manual service request message 79 13.7.22 Network management escape code 79 13.7.23 Router mode 80 13.7.24 Ro
17、uter clear group or subnet table . 80 13.7.25 Router group or subnet table download . 80 13.7.26 Router group forward 80 13.7.27 Router subnet forward 80 13.7.28 Router Do Not forward group . 80 13.7.29 Router Do Not forward subnet . 80 13.7.30 Router group or subnet table report . 80 13.7.31 Router
18、 status . 81 13.7.32 Router half escape code . 81 13.8 DPDU types and formats 81 13.8.1 General . 81 13.8.2 Query status . 81 13.8.3 Proxy status . 85 13.8.4 Clear status 85 13.8.5 Query transceiver status 85 Annex A (normative) Reference implementation . 86 A.1 General . 86 A.2 Predictive CSMA algo
19、rithm 86 A.3 LPDU transmit algorithm 141 A.4 LPDU receive algorithm 143 A.5 Routing algorithm 144 A.6 Learning algorithm 145 A.7 Transaction control algorithm .145 A.8 Network layer algorithm152 A.9 TPDU and SPDU send algorithm with authentication .168 A.10 Application Layer 223 A.11 Network Managem
20、ent Commands .278 A.12 Configuration data structures 315 A.13 Include files for the reference implementation 334 A.14 Application protocol state variables and address recognition Structures .363 A.15 Query-id data structures .366 A.16 Respond to query data structure .366 A.17 Update somain data stru
21、ctures 367 A.18 Leave domain data structures .367 A.19 Update key data structures 367 A.20 Update address data structures 367 A.21 Query address data structures 368 A.22 Query NV Cnfg data structures 369 A.23 Update group address data structures .369 A.24 Query domain data structures .369 A.25 Updat
22、e network variable configuration data structures 370 A.26 Set node mode data structures 370 14908-1 ISO/IEC:2012 (E) - 4 - A.27 Read memory data structures 370 A.28 Write memory data structures .371 A.29 Checksum recalculate data structures .371 A.30 Install command data structures .371 A.31 Memory
23、refresh data structures 380 A.32 Query SI data structures .380 A.33 NV fetch data structures .380 A.34 Manual service request message ddata structures .380 A.35 Product query data structures .381 A.36 Router mode data structures .381 A.37 Router table clear group or subnet table data structures .381
24、 A.38 Router group or subnet download data structures .381 A.39 Router group forward data structures 382 A.40 Router subnet forward data structures .382 A.41 Router group No-Forward data structures .382 A.42 Router subnet No-Forward data structures 382 A.43 Group / subnet table report data structure
25、s .383 A.44 Router status data structures 383 A.45 Query status data structures .383 A.46 Proxy status data structures 384 A.47 Clear status data structures .384 A.48 Query transceiver status data structures .384 Annex B (normative) Additional Data Structures .385 B.1 General .385 B.1.1 System image
26、 385 B.1.2 Application image 385 B.1.3 Network image .386 B.2 Read-only structures .386 B.2.1 Fixed read-only data structures .386 B.2.2 Read-only structure field descriptions 387 B.3 Domain table 390 B.3.1 Domain table field descriptions .391 B.4 Address table .391 B.4.1 Declaration of group addres
27、s format 392 B.4.2 Group address field descriptions 392 B.4.3 Declaration of subnet/node address format .392 B.4.4 Subnet/node address field descriptions .393 B.4.5 Declaration of broadcast address format .393 B.4.6 Broadcast address field descriptions .393 B.4.7 Declaration of turnaround address fo
28、rmat .393 B.4.8 Turnaround address field descriptions .394 B.4.9 Declaration of protocol processors address format 394 B.4.10 Protocol processor address field descriptions 394 B.4.11 Timer field descriptions 394 B.5 Network variable tables - informative 395 B.5.1 Network variable configuration table
29、 field descriptions - informative 396 B.5.2 Network variable alias table field descriptions - informative397 B.5.3 Network variable fixed table field descriptions - informative .397 B.6 Self-Identification structures 397 B.6.1 SI Structure field descriptions .398 B.6.2 NV descriptor table field desc
30、riptions .398 B.6.3 SNVT table extension records .399 B.6.4 SNVT alias field descriptions .400 B.6.5 Version 2 SI data 400 B.7 Configuration structure 403 B.7.1 General .403 B.7.2 Configuration structure field descriptions .404 B.8 Statistics relative structure 405 Annex C (informative) Behavioral c
31、haracteristics .407 - 5 - 14908-1 ISO/IEC:2012 (E) C.1 Channel capacity and throughput .407 C.2 Network metrics .408 C.3 Transaction metrics .409 C.4 Boundary conditions power-up .410 C.5 Boundary conditions high load .410 Annex D (normative) PDU summary 411 Annex E (normative) Naming and addressing
32、 .413 E.1 Address types and formats 413 E.2 Domains .413 E.3 Subnets and nodes .414 E.4 Groups 414 E.5 Unique_Node_ID and node address assignment .415 E.6 NPDU addressing 416 Annex F (normative) List of patents that pertain to this International Standard 418 Bibliography 420 Figures Figure 1 Network
33、 topology & symbols 12 Figure 2 Protocol terminology . 12 Figure 3 Protocol layering . 14 Figure 4 Interface between the MAC and the link layers 16 Figure 5 MPDU/LPDU format . 17 Figure 6 Predictive p-persistent CSMA concepts and parameters . 18 Figure 7 Allocation of priority slots within the Busy
34、Channel Packet Cycle 20 Figure 8 CRC register state behaviour example 25 Figure 9 Single channel topologies . 26 Figure 10 Typical tree-like domain topology . 27 Figure 11 Network service interface . 28 Figure 12 Network layerinternal structure . 28 Figure 13 NPDU format 28 Figure 14 Transaction con
35、trol service interface 31 Figure 15 Transport interface to upper layers. 33 Figure 16 TPDU types and formats 34 Figure 17 Transport protocol diagram for multicast message with a loss of both the message and the ACK TPDUs . 35 Figure 18 Transport protocolSend FSM 36 Figure 19 Transport protocolReceiv
36、e FSM . 36 Figure 20 Probability of transaction completion in k Retries . 37 14908-1 ISO/IEC:2012 (E) - 6 - Figure 21 Methodology for calculating timer values . 38 Figure 22 Session layer interface to application layer 39 Figure 23 Session layerinternal structuring . 40 Figure 24 SPDU types and form
37、ats 41 Figure 25 Non-Idempotent request with multiple SPDU losses 43 Figure 26 Secure idempotent request with multiple SPDU losses . 44 Figure 27 Request-response protocolclient FSM 45 Figure 28 Request-response protocolsimplified server FSM 45 Figure 29 Application layer interface 48 Figure 30 APDU
38、 format . 49 Figure 31 Application protocol diagram for multicast acknowledged transaction . 50 Figure 32 Application protocol diagram for multicast request/response transaction 51 Figure B.1 SI data . 400 Figure C.1 Probability of successful delivery over k hops 409 Figure D.1 Protocol PDU summary
39、412 Figure E.1 Physical topology and logical addressing (single domain) . 415 Figure E.2 NPDU/TPDU/SPDU addressingphysical address formats 416 Tables Table 1 Application layer primitives 48 Table 2 Resource codes . 65 Table 3 Space of the property ID 65 Table B.1 Buffer size encodings . 389 Table B.
40、2 Buffer Count Encodings . 390 Table B.3 Encoding of timer field values 395 Table B.4 Buffer timeout encoding . 405 Table C.1 Key throughput parameters 408 Table E.1 NPDU/TPDU/SPDU addressing - logical address formats 416 Table F.1 Patents in the US 418 Table F.2 Patents in Europe and other countrie
41、s . 419 - 7 - 14908-1 ISO/IEC:2012 (E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of
42、 International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in l
43、iaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint t
44、echnical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. ISO/IEC 14
45、908-1 was prepared by CEN/TC 247 and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by the national bodies of ISO and IEC. ISO/IEC 14908 consists of the following parts, under the general title In
46、formation technology Control network protocol: Part 1: Protocol stack Part 2: Twisted pair communication Part 3: Power line channel specification Part 4: IP communication 14908-1 ISO/IEC:2012 (E) - 8 - Introduction This International Standard has been prepared to provide mechanisms through which var
47、ious vendors of local area control networks may exchange information in a standardised way. It defines communication capabilities. This International Standard is to be used by all involved in design, manufacture, engineering, installation and commissioning activities. The International Organization
48、for Standardization (ISO) and International Electrotechnical Commission (IEC) draw attention to the fact that it is claimed that compliance with this International Standard may involve the use of patents held by Echelon Corporation. The ISO and IEC take no position concerning the evidence, validity
49、and scope of this patent right. The holder of this putative patent right has assured the ISO and IEC that they are willing to negotiate free of charge licences under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of the putative patent rights is registered with the ISO and IEC. Information may be obtained from: Echelon Corporation, 4015 Me
