1、BRITISH STANDARD BS EN 60728-7-2:2005 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 The European Standard EN 60728-7-2:2005 has the status of a British Standard
2、ICS 35.100.60; 33.160; 33.040 BS EN 60728-7-2:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 22 March 2005 BSI 22 March 2005 ISBN 0 580 45597 1 National foreword This British Standard is the official English language version of EN 60728
3、-7-2:2005. It is identical with IEC 60728-7-2:2003. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on reque
4、st to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI El
5、ectronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers t
6、o understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document c
7、omprises a front cover, an inside front cover, the EN title page, pages 2 to 45 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60728-7-2 NORME EUROPENNE
8、EUROPISCHE NORM February 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any f
9、orm and by any means reserved worldwide for CENELEC members. Ref. No. EN 60728-7-2:2004 E ICS 35.100.60; 33.160; 33.040 English version Cable networks for television signals, sound signals and interactive services Part 7-2: Hybrid Fibre Coax Outside Plant Status Monitoring Media access Control (MAC)
10、 Layer Specification (IEC 60728-7-2:2003) Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs Partie 7-2: Surveillance de ltat des installations extrieures des rseaux hybrides fibre optique et cble coaxial - Spcification de la couche du
11、 contrle daccs au support (CEI 60728-7-2:2003) Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste Teil 7-2: Zustandsberwachung Hybrid- Faser-Koax-Netze (HFC) Festlegung Steuerungsschicht fr Mediumzugriff (MAC) (IEC 60728-7-2:2003) This European Standard was approved by CENELEC on 2004-
12、12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be ob
13、tained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in one official version (English). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat h
14、as the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola
15、nd, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 62708-7-2:0240 - - 2 Foreword The text of the International Standard IEC 60728-7-2:2003, prepared by technical area 5: Cable networks for television signals, sound signals and interactive services, of IEC TC 100, Aud
16、io, video and multimedia systems and equipment, was submitted to the formal vote and was approved by CENELEC as EN 60728-7-2 on 2004-12-01 without any modification. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical nati
17、onal standard or by endorsement (dop) 2005-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-12-01 _ Endorsement notice The text of the International Standard IEC 60728-7-2:2003 was approved by CENELEC as a European Standard without any modific
18、ation. _ Page2 EN6072872:2005 2 067-82-72 IE:C0023()E CONTENTS FOREWODR. 4 INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms, definitions and abbreviations 7 4 Reference architecture forward and return channel specifications 9 5 Media access control layer specification.9 5.1 Overview.9 5.2
19、MAC packet transport10 5.3 MAC packet structure12 5.4 MAC packet delimiters.17 5.5 MAC protocol data units (PDUs)17 6 MAC protocol operation28 6.1 Non-volatile parameters 28 6.2 Duplex capabilities 28 6.3 Packet priorities 28 6.4 Packet reception .28 6.5 NE responses29 6.6 Message sequence numbers a
20、nd transaction synchronization .29 6.7 Solicited messages .30 6.8 Autonomous (unsolicited) messages .30 6.9 Return channel transmissions34 6.10 MAC state machines .34 Annex A (informative) Operational details 37 A.1 Introduction 37 A.2 Time of day 37 A.3 Firmware downloads.37 A.4 NE addressing37 A.5
21、 Alarm processing HMS MAC protocol .38 A.6 Automatic channel discovery 42 A.7 Auto-registration.43 A.8 Configuration changes and SNMP trap generation44 Figure 1 Reference architecture diagram .9 Figure 2 Bit transmission order 11 Figure 3 MAC packet structure.12 Figure 4 MAC header control byte Bit
22、definition 12 Figure 5 MAC header sequence byte Bit definition 15 Figure 6 MAC PDU structure17 Figure 7 STATRESP STATUS byte Bit definition.19 Figure 8 Return channel transmission permitted 34 Page3 EN6072872:2005067-82-72 IEC:20(30E) 3 Figure 9 Contention state diagram .35 Figure 10 Backoff state d
23、iagram 36 Figure A.1 Property MIB usage 38 Table 1 Transponder type classifications .6 Table 2 Generic MAC packet structure.12 Table 3 Protocol field values13 Table 4 MAC PDUs18 Table 5 Possible MAC protocol transactions 18 Table 6 NAK PDU format .19 Table 7 ACK PDU format .19 Table 8 STATRQST PDU f
24、ormat 19 Table 9 STATRESP PDU format 19 Table 10 CHNLRQST bit settings.20 Table 11 CNTNRM bit settings.20 Table 12 CNTCUR bit settings .20 Table 13 MAJOR bit settings20 Table 14 MINOR bit settings 21 Table 15 TALKRQST PDU format 21 Table 16 TALK PDU format22 Table 17 CONTMODE PDU format.22 Table 18
25、CONTMODE: MODE settings 22 Table 19 NE message retrieval example 23 Table 20 REG_REQ PDU format24 Table 21 SET_ADDR PDU format 24 Table 22 REG_END PDU format25 Table 23 REG_END: STATUS settings 25 Table 24 CHNLDESC PDU format26 Table 25 INVCMD PDU format.27 Table 26 INVCMD: REASON codes .27 Table 27
26、 TIME PDU format 28 Table 28 Non-volatile parameters 28 Table 29 MAC sequence field example (non-contention mode) 30 Table 30 Contention state settings versus forward channel packets.31 Table 31 Backoff state machine parameters.33 Table A.1 Properties 39 Table A.2 Alarm notification and retrieval Po
27、lled mode41 Table A.3 Alarm notification and retrieval Contention mode 42 Table A.4 Auto-registration implementation example44 Page4 EN6072872:2005 6 067-82-72 IE:C0023()E INTRODUCTION Standards of the IEC 60728 series deal with cable networks for television signals, sound signals and interactive se
28、rvices including equipment, systems and installations for head-end reception, processing 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 me
29、dia. All kinds of networks like CATV-networks, MATV-networks and SMATV-networks, 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
30、 inputs to the head-end or other interface points to the network up to the system 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 access
31、ories therefore is excluded. Page5 EN6072872:2005067-82-72 IEC:20(30E) 7 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 1 Scope This part of IEC 60728 specifies r
32、equirements for The Hybrid Fibre Coax (HFC) Outside Plant (OSP) Media Access Control (MAC) Layer. This 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 speci
33、fication describes the messaging and protocols implemented at the Data Link Layer (DLL), layer 2 in the 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
34、element (HE). This standard describes the MAC layer protocols that must be implemented between all Type 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 wit
35、h this standard will be specifically noted herein as necessary. Refer to Table 1 for a full definition 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 Applica
36、tion Type 0 Refers to legacy transponder equipment, which is incapable of supporting the specifications 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 o
37、r other means at the head-end. Type 1 Refers to stand-alone transponder equipment (legacy or new), which 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
38、 to the standard or upgraded) that connects to legacy network equipment via a proprietary interface. Type 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 ca
39、n be factory or field-installed. Its RF connection is independent of the monitored NE. Type 3 Refers to 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 s
40、upport the physical specifications defined in the standards. It can be factory-installed. It may or may not be field- installed. Its RF connection is through the monitored NE. 2 Normative references None. Page6 EN6072872:2005 8 067-82-72 IE:C0023()E 3 Terms, definitions and abbreviations For the pur
41、poses of this document, the following definitions apply. 3.1 Terms and definitions 3.2 data link layer (DLL) layer 2 in the 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
42、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 typically in the range of 300 MHz to 860 MHz depending on implementation 3.4 full spectrum combined forward and return spectrums in
43、 HFC cable systems and excludes any guard band 3.5 guard band unused frequency band between the upper edge of the usable return spectrum and the lower edge of the usable forward spectrum in HFC cable systems 3.6 network element (NE) active element in the outside plant (OSP) that is capable of receiv
44、ing commands from a head- end element (HE) in the head-end and, as necessary, providing status information and alarms back to the HE 3.7 open system interconnection (OSI) a framework of the International Organization for Standardization (ISO) standards for communication between multi-vendor systems
45、that organizes the communication process into seven different categories that are placed in a layered sequence based on the relationship to the user. Each layer uses the layer immediately below it and provides services to the layer above. Layers 7 through 4 deal with end-to-end communication between
46、 the message source and destination, and layers 3 through 1 deal with network functions 3.8 organizationally unique identifier (OUI) a 3-octet IEEE assigned identifier that can be used to generate universal LAN MAC addresses and protocol identifiers per ANSI/IEEE standard 802 for use in local and me
47、tropolitan area network applications 3.9 physical (PHY) layer layer 1 in the open system interconnection (OSI) architecture; the layer that provides services to transmit bits or groups of bits over a transmission link between open systems and which entails electrical, mechanical and handshaking proc
48、edures 3.10 return spectrum pass band of frequencies in HFC cable systems with a lower edge of 5 MHz and an upper edge that is typically in the range of 42 MHz to 65 MHz depending on the particular geographical area Page7 EN6072872:2005067-82-72 IEC:20(30E) 9 3.11 transponder device that interfaces to outside plant (OSP) NEs and relays status and alarm information to the HE. It can interface with an active NE via an arrangement of parallel analogue, parallel digital and serial ports 3.12 Abbreviated terms CCITT Comit Consultatif International de Tlgraphie et Tlphonie (ITU
