1、 International Telecommunication Union ITU-T J.214TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2007) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Interactive systems for digital television distribution Cable modem TDM emulation interfac
2、e ITU-T Recommendation J.214 ITU-T Rec. J.214 (07/2007) i ITU-T Recommendation J.214 Cable modem TDM emulation interface Summary TDM emulation service (TDM-E) is a method for cable operators to deliver T1, E1 and NxDS0 emulation services that meet or exceed the quality requirement of applications th
3、at use such services. ITU-T Recommendation J.214 is part of the CableModem family of Recommendations and, in particular, defines the TDM-E architecture and components. Source ITU-T Recommendation J.214 was approved on 29 July 2007 by ITU-T Study Group 9 (2005-2008) under the ITU-T Recommendation A.8
4、 procedure. ii ITU-T Rec. J.214 (07/2007) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent o
5、rgan of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes th
6、e topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards ar
7、e prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendat
8、ion may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used
9、to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectu
10、al Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received no
11、tice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU
12、 2008 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. J.214 (07/2007) iii CONTENTS Page 1 Scope and purpose 1 1.1 Scope 1 1.2 Introduction and overview 1 2 References. 2 2.1 Normative references 2 2.
13、2 Informative references 4 2.3 Reference acquisition . 4 3 Terms and definitions . 5 3.1 Terms defined elsewhere 5 3.2 Terms defined in this Recommendation. 5 4 Abbreviations, acronyms and conventions. 6 4.1 Abbreviations and acronyms 6 4.2 Conventions 7 5 Technical overview. 8 5.1 Background. 8 5.2
14、 Principal technical considerations 8 5.3 Devices/Interfaces 9 5.4 Architecture 13 5.5 Network environment. 16 6 Technical specification . 20 6.1 General requirements 20 6.2 TDM-IP network interworking. 23 6.3 Payload formats 26 6.4 Timing aspects 30 6.5 Defects and monitoring 43 6.6 Security. 44 6.
15、7 Provisioning and service initiation . 44 6.8 Management . 64 Annex A Event, SYSLOG, and SNMP trap extensions . 70 A.1 TEA events description 70 A.2 DOCSIS events extensions. 70 Annex B TEA MIB definition 73 B.1 CL-PW-TC-MIB 73 B.2 CL-PW-MIB. 77 B.3 CL-PW-TDM-MIB. 109 iv ITU-T Rec. J.214 (07/2007)
16、Page Appendix I Operator recommendations 143 I.1 Preferential treatment for TE-CMs 143 I.2 Service level agreement considerations . 143 I.3 Standard DOCSIS operations 144 Appendix II Delay aspects 146 II.1 Upstream delay. 146 II.2 Downstream delay 147 Appendix III Bandwidth usage . 149 III.1 Upstrea
17、m bandwidth usage. 149 III.2 Downstream bandwidth usage 150 Appendix IV eTEA configuration example 151 IV.1 Structure agnostic T1 configuration . 151 IV.2 Structure agnostic E1 configuration . 152 IV.3 Structure aware 5xDS0 configuration 153 IV.4 Structure aware 5xDS0 configuration with CAS . 154 IV
18、.5 Structure aware T1 with RTP configuration 155 Appendix V Clocking options, by example 157 V.1 Background. 157 V.2 Clocking modes 158 V.3 Clocking decision tree 161 Bibliography. 162 ITU-T Rec. J.214 (07/2007) 1 ITU-T Recommendation J.214 Cable modem TDM emulation interface 1 Scope and purpose 1.1
19、 Scope TDM Emulation service (TDM-E) is a method for cable operators to deliver T1, E1 and NxDS0 emulation services that meet or exceed the quality requirement of applications that use such services. This Recommendation is part of the CableModem family of Recommendations and, in particular, defines
20、the TDM-E architecture and components. NOTE The structure and content of this Recommendation have been organized for ease of use by those familiar with the original source material; as such, the usual style of ITU-T Recommendations has not been applied. 1.2 Introduction and overview In legacy teleco
21、mmunication networks, telephone calls are often brought into households, one at a time, over twisted pair wires. To transport many telephone calls at once (i.e., between business, wireless base stations and in the telephone network), single calls are time-multiplexed together into T1 signals. A sing
22、le T1 signal carries 24 individual calls, and a similar E1 signal carries 32 calls. Since T1 and E1 (T1/E1) services have been deployed for quite some time, the performance standards, tariffs and market are well defined. A number of ITU, ETSI and ANSI standards define the various aspects of T1/E1 se
23、rvices. Moreover, the usage and deployment models of T1/E1 lines are well understood. This Recommendation outlines the methods by which T1/E1 structured, unstructured, and fractional signals can be converted to IP packets, transported over a DOCSIS IP network, and converted back to T1/E1 signals wit
24、h high reliability and quality. Figure 1-1 shows a simple T1 service delivered between two customer sites over DOCSIS. J.214(07)_F.1-1T1/E1contained in pseudowire IP over DOCSIS RFI interfaceT1/E1T1/E1TE-CMTSA TE-CM contains a CM integrated with a TDM/IP-T1/E1converterFigure 1-1 Example of T1 servic
25、e delivery 2 ITU-T Rec. J.214 (07/2007) 2 References 2.1 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid
26、. All Recommendations and other references are subject to revisions; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations
27、is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.703 ITU-T Recommendation G.703 (2001), Physical/electrical characteristics of hierarchical digital interfaces. ITU-T G.704 ITU-T Recomme
28、ndation G.704 (1998), Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels. ITU-T G.706 ITU-T Recommendation G.706 (1991), Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704. ITU
29、-T G.732 ITU-T Recommendation G.732 (1988), Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s. ITU-T G.810 ITU-T Recommendation G.810 (1996), Definitions and terminology for synchronization networks. ITU-T G.823 ITU-T Recommendation G.823 (2000), The control of jitter and w
30、ander within digital networks which are based on the 2048 kbit/s hierarchy. ITU-T G.824 ITU-T Recommendation G.824 (2000), The control of jitter and wander within digital networks which are based on the 1544 kbit/s hierarchy. ITU-T G.1020 ITU-T Recommendation G.1020 (2006), Performance parameter def
31、initions for quality of speech and other voiceband applications utilizing IP networks. ITU-T G.1050 ITU-T Recommendation G.1050 (2007), Network model for evaluating multimedia transmission performance over Internet protocol. ITU-T J.83 ITU-T Recommendation J.83 (2007), Digital multi-program systems
32、for television, sound and data services for cable distribution. ITU-T J.112 ITU-T Recommendation J.112 (1998), Transmission systems for interactive cable television services. ITU-T J.122 ITU-T Recommendation J.122 (2007), Second-generation transmission systems for interactive cable television servic
33、es IP cable modems. ITU-T J.126 ITU-T Recommendation J.126 (2007), Embedded cable modem device specification. ITU-T J.210 ITU-T Recommendation J.210 (2006), Downstream RF interface for cable modem termination systems. ITU-T Rec. J.214 (07/2007) 3 ITU-T J.211 ITU-T Recommendation J.211 (2006), Timing
34、 interface for cable modem termination systems. ITU-T J.212 ITU-T Recommendation J.212 (2006), Downstream external physical layer interface for modular cable modem termination systems. ITU-T J.222.1 ITU-T Recommendation J.222.1 (2007), Third-generation transmission systems for interactive cable tele
35、vision services IP cable modems: Physical layer specification. ITU-T J.222.2 ITU-T Recommendation J.222.2 (2007), Third-generation transmission systems for interactive cable television services IP cable modems: MAC and upper layer protocols . ITU-T X.690 ITU-T Recommendation X-690 (2002) |ISO/IEC 88
36、25-1:2002, Information technology ASN.1 encoding rules: Specification of Basic Encoding rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER). DOCSIS OSSIv2.0 ANSI/SCTE 79-2 (2002), DOCS 2.0 Operations Support System Interface. IETF RFC 1123 IETF RFC 1123 (1989), Require
37、ments for Internet Hosts Application and Support. IETF RFC 1157 IETF RFC 1157 (1990), A Simple Network Management Protocol (SNMP). IETF RFC 1350 IETF RFC 1350 (1992), The TFTP Protocol (Revision 2). IETF RFC 2131 IETF RFC 2131 (1997), Dynamic Host Configuration Protocol. IETF RFC 2132 IETF RFC 2132
38、(1997), DHCP Options and BOOTP Vendor Extensions. IETF RFC 2494 IETF RFC 2494 (1999), Definitions of Managed Objects for the DS0 and DS0 Bundle Interface Type. IETF RFC 2495 IETF RFC 2495 (1999), Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types. IETF RFC 2670 IETF RFC 2670
39、(1999), Radio Frequency (RF) Interface Management Information Base for MCNS/DOCSIS compliant RF interfaces. IETF RFC 2863 IETF RFC 2863 (2000), The Interfaces Group MIB. IETF RFC 3396 IETF RFC 3396 (2002), Encoding Long Options in the Dynamic Host Configuration Protocol (DHCPv4). IETF RFC 3550 IETF
40、RFC 3550 (2003), RTP: A Transport Protocol for Real-Time Applications. IETF RFC 3611 IETF RFC 3611 (2003), RTP Control Protocol Extended Reports (RTCP XR). IETF RFC 3635 IETF RFC 3635 (2003), Definitions of Managed Objects for the Ethernet-like Interface Types. IETF RFC 3636 IETF RFC 3636 (2003), De
41、finitions of Managed Objects for IEEE 802.3 Medium Attachment Units (MAUs). IETF RFC 3711 IETF RFC 3711 (2004), The Secure Real-time Transport Protocol (SRTP). 4 ITU-T Rec. J.214 (07/2007) IETF RFC 3895 IETF RFC 3895 (2004), Definitions of Managed Objects for the DS1, E1, DS2, and E2 Interface Types
42、. IEEE 1588 IEEE 1588 (2002), Standard for a Precision Clock Synchronization Protocol for networked measurement and Control Systems. Also IEC 61588 (2004). 2.2 Informative references This Recommendation uses the following informative references. ANSI T1.403 ANSI T1.403-1999, Network and Customer Ins
43、tallation Interfaces (ISDN) primary rate Layer 1 Electrical Interfaces Specification. CMCI Data-Over-Cable Service Interface Specifications Cable Modem to Customer Premise Equipment Interface Specification, SP-CMCI-I10-050408, April 8, 2005, Cable Television Laboratories, Inc. IANA UDP PORTS Interne
44、t Assigned Numbers Authority, Port Numbers, April 2006, http:/www.iana.org/assignments/port-numbers ID PW MIB T. Nadeau, D. Zelig, Pseudowire (PW) Management Information Base (MIB), draft-ietf-pwe3-pw-mib-14, July 2008. ID PWTC T. Nadeau, D. Zelig, Definitions of Textual Conventions for Pseudowires
45、(PW) Management, draft-ietf-pwe3-pw-tc-mib-14, July 2008. ID VCCV T. Nadeau, C. Pignataro, Pseudowire Virtual Circuit Connectivity Verification (VCCV), A Control Channel for Pseudowires, draft-ietf-pwe3-vccv-15, March 2008. IETF RFC 3551 IETF RFC 3551 (2003), RTP Profile for Audio and Video Conferen
46、ces with Minimal Control. IETF RFC 4553 IETF RFC 4553 (2006), Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP). IETF RFC 4928 IETF RFC 4928 (2007), Avoiding Equal Cost Multipath Treatment in MPLS Networks. MLDA Sisalem D. and A. Wolisz, MLDA: A TCP-friendly Congestion Control
47、Framework for Heterogeneous Multicast Environments, IEEE Proc. IWQoS 2000. TIA NIM TR41.4-03-05-029 (2003), IP Network Impairment Simulation for VoIP Performance Testing. TR-62411 AT Phone 303-661-9100; Fax 303-661-9199; Internet: http:/ Institute of Electrical and Electronics Engineers (IEEE), http
48、:/www.ieee.org Internet Engineering Task Force (IETF), http:/www.ietf.org ITU-T Rec. J.214 (07/2007) 5 International Telecommunication Union Telecommunication Standardization Sector (ITU-T), http:/www.itu.int/itu-t/ International Organization for Standardization (ISO), http:/www.iso.org Metro Ethern
49、et Forum (MEF), http:/www.metroethernetforum.org Society of Cable Telecommunications Engineers (SCTE), http:/www.scte.org Telecommunications Industry Association (TIA), http:/www.tiaonline.org/ Telcordia Technologies, http:/ 3 Terms and definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 jitter: The fluctuation i
