1、INTERNATIONAL STANDARD IEC 60728-7-2 First edition 2003-10 Cable networks for television signals, sound signals and interactive services Part 7-2: Hybrid Fibre Coax Outside Plant Status Monitoring Media access Control (MAC) Layer Specification Reference number IEC 60728-7-2:2003(E)Publication number
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8、9 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IEC 60728-7-2 First edition 2003-10 Cable networks for television signals, sound signals and interactive services Part 7-2: Hybrid Fibre Coax Outside Plant Status Monitoring Media access Control (MAC) Layer Specification IEC 2003 Copyright - all r
9、ights reserved 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 the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Gen
10、eva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch X For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 60728-7-2 IEC:2003(E) CONTENTS FOREWORD 4 INTRODUCTION 6
11、 1 Scope 7 2 Normative references. 7 3 Terms, definitions and abbreviations 8 4 Reference architecture forward and return channel specifications.10 5 Media access control layer specification .10 5.1 Overview .10 5.2 MAC packet transport 11 5.3 MAC packet structure 13 5.4 MAC packet delimiters.18 5.5
12、 MAC protocol data units (PDUs) 18 6 MAC protocol operation 29 6.1 Non-volatile parameters.29 6.2 Duplex capabilities.29 6.3 Packet priorities.29 6.4 Packet reception29 6.5 NE responses 30 6.6 Message sequence numbers and transaction synchronization .30 6.7 Solicited messages31 6.8 Autonomous (unsol
13、icited) messages31 6.9 Return channel transmissions35 6.10 MAC state machines35 Annex A (informative) Operational details 38 A.1 Introduction.38 A.2 Time of day.38 A.3 Firmware downloads.38 A.4 NE addressing 38 A.5 Alarm processing HMS MAC protocol .39 A.6 Automatic channel discovery.43 A.7 Auto-reg
14、istration .44 A.8 Configuration changes and SNMP trap generation45 Figure 1 Reference architecture diagram10 Figure 2 Bit transmission order.12 Figure 3 MAC packet structure.13 Figure 4 MAC header control byte Bit definition.13 Figure 5 MAC header sequence byte Bit definition 16 Figure 6 MAC PDU str
15、ucture 18 Figure 7 STATRESP STATUS byte Bit definition .20 Figure 8 Return channel transmission permitted.3560728-7-2 IEC:2003(E) 3 Figure 9 Contention state diagram .36 Figure 10 Backoff state diagram.37 Figure A.1 Property MIB usage 39 Table 1 Transponder type classifications. 7 Table 2 Generic MA
16、C packet structure .13 Table 3 Protocol field values 14 Table 4 MAC PDUs 19 Table 5 Possible MAC protocol transactions.19 Table 6 NAK PDU format20 Table 7 ACK PDU format20 Table 8 STATRQST PDU format 20 Table 9 STATRESP PDU format.20 Table 10 CHNLRQST bit settings .21 Table 11 CNTNRM bit settings .2
17、1 Table 12 CNTCUR bit settings21 Table 13 MAJOR bit settings21 Table 14 MINOR bit settings 22 Table 15 TALKRQST PDU format.22 Table 16 TALK PDU format 23 Table 17 CONTMODE PDU format.23 Table 18 CONTMODE: MODE settings.23 Table 19 NE message retrieval example 24 Table 20 REG_REQ PDU format 25 Table
18、21 SET_ADDR PDU format.25 Table 22 REG_END PDU format 26 Table 23 REG_END: STATUS settings.26 Table 24 CHNLDESC PDU format27 Table 25 INVCMD PDU format .28 Table 26 INVCMD: REASON codes28 Table 27 TIME PDU format 29 Table 28 Non-volatile parameters.29 Table 29 MAC sequence field example (non-content
19、ion mode).31 Table 30 Contention state settings versus forward channel packets .32 Table 31 Backoff state machine parameters.34 Table A.1 Properties 40 Table A.2 Alarm notification and retrieval Polled mode42 Table A.3 Alarm notification and retrieval Contention mode.43 Table A.4 Auto-registration i
20、mplementation example45 4 60728-7-2 IEC:2003(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 7-2: Hybrid Fibre Coax Outside Plant status monitoring Media Access Control (MAC) layer specification FOREWORD 1) The Interna
21、tional Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electro
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30、ces cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for id
31、entifying any or all such patent rights. International Standard IEC 60728-7-2 has been prepared by technical area 5: Cable networks for television signals, sound signals and interactive services, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This standard was sub
32、mitted to the national committees for voting under the IEC Fast Track Procedure as the following documents: CDV Report on voting 100/577/CDV 100/684/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publicatio
33、n has been drafted in accordance with the ISO/IEC Directives, Part 2.60728-7-2 IEC:2003(E) 5 The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. The
34、following differences exist in some countries: The Japanese de facto standard (NCTEA S-006) concerning requirements for the HFC outside plant management, which was published in 1995, has already been available in Japan. The purpose of this standard is to support the design and implementation of inte
35、roperable management systems for HFC cable networks used in Japan. 6 60728-7-2 IEC:2003(E) INTRODUCTION Standards of the IEC 60728 series deal with cable networks for television signals, sound signals and interactive services including equipment, systems and installations for head-end reception, pro
36、cessing and distribution of television and sound signals and their associated data signals, and processing, interfacing and transmitting all kinds of signals for interactive services using all applicable transmission media. All kinds of networks like CATV-networks, MATV-networks and SMATV-networks,
37、individual receiving networks, and all kinds of equipment, systems and installations installed in such networks, are within this scope. The extent of this standardization work is from the antennas, special signal source inputs to the head-end or other interface points to the network up to the system
38、 outlet or the terminal input, where no system outlet exists. The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals, etc.) as well as any coaxial and optical cables and accessories therefore is excluded.60728-7-2 IEC:2003(E) 7 CABLE NETWORKS FOR TELEVISION
39、 SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 7-2: Hybrid Fibre Coax Outside Plant status monitoring Media Access Control (MAC) layer specification 1 Scope This part of IEC 60728 specifies requirements for The Hybrid Fibre Coax (HFC) Outside Plant (OSP) Media Access Control (MAC) Layer. This
40、 standard is part of the series developed to support the design and implementation of interoperable management systems for evolving HFC cable networks. The HMS Media Access Control (MAC) layer specification describes the messaging and protocols implemented at the Data Link Layer (DLL), layer 2 in th
41、e 7 layer ISO-OSI reference model, that support reliable and efficient communications between HMS compliant transponders interfacing to managed OSP network elements (NEs) and a centralized head-end element (HE). This standard describes the MAC layer protocols that must be implemented between all Typ
42、e 2 and Type 3 compliant OSP transponders on the HFC plant and the controlling equipment in the head-end to support bandwidth management and reliable communications. Any exceptions to compliance with this standard will be specifically noted herein as necessary. Refer to Table 1 for a full definition
43、 of the type classifications. Transponder type classifications referenced within the HMS series of standards are defined in Table 1. Table 1 Transponder type classifications Type Description Application Type 0 Refers to legacy transponder equipment, which is incapable of supporting the specification
44、s This transponder interfaces with legacy network equipment through proprietary means. This transponder could be managed through the same management applications as the other types through proxies or other means at the head-end. Type 1 Refers to stand-alone transponder equipment (legacy or new), whi
45、ch can be upgraded to support the specifications This transponder interfaces with legacy network equipment through proprietary means. Type 1 is a standards-compliant transponder (either manufactured to the standard or upgraded) that connects to legacy network equipment via a proprietary interface. T
46、ype 2 Refers to a stand-alone, compliant transponder This transponder interfaces with network equipment designed to support the electrical and physical specifications defined in the standards. It can be factory or field-installed. Its RF connection is independent of the monitored NE. Type 3 Refers t
47、o a stand-alone or embedded, compliant transponder. This transponder interfaces with network equipment designed to support the electrical specifications defined in the standards. It may or may not support the physical specifications defined in the standards. It can be factory-installed. It may or ma
48、y not be field- installed. Its RF connection is through the monitored NE. 2 Normative references None. 8 60728-7-2 IEC:2003(E) 3 Terms, definitions and abbreviations For the purposes of this document, the following definitions apply. 3.1 Terms and definitions 3.2 data link layer (DLL) layer 2 in the
49、 Open System Interconnection (OSI) architecture; the layer that provides services to transfer data over the physical transmission link between open systems 3.3 forward spectrum pass band of frequencies in HFC cable systems with a lower edge of between 48 MHz and 87,5 MHz, depending on the particular geographical area, and an upper edge that is
