1、 International Telecommunication Union ITU-T G.984.3TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2014) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Optical line systems for local and access networks Gigabit-capable passive opt
2、ical networks (G-PON): Transmission convergence layer specification Recommendation ITU-T G.984.3 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARR
3、IER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION
4、OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 General G.900G.909 Parameters for optical fibre cable systems G.910
5、G.919 Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s G.920G.929 Digital line transmission systems on cable at non-hierarchical bit rates G.930G.939 Digital line systems provided by FDM transmission bearers G.940G.949 Digital line systems G.950G.959 Digital section and
6、digital transmission systems for customer access to ISDN G.960G.969 Optical fibre submarine cable systems G.970G.979 Optical line systems for local and access networks G.980G.989Metallic access networks G.990G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G
7、.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.984.3 (01/2014) i Recommendation ITU-T G
8、.984.3 Gigabit-capable passive optical networks (G-PON): Transmission convergence layer specification Summary Recommendation ITU-T G.984.3 describes the transmission convergence layer for gigabit-capable passive optical networks a family of flexible access networks capable of providing a range of br
9、oadband and narrow-band services, operating at the rates of 2.48832 Gbit/s downstream and 1.24416 or 2.48832 Gbit/s upstream. This Recommendation includes the specifications of the following: gigabit PON transmission convergence (GTC) layer framing; upstream time division multiple access mechanism;
10、physical layer operation, administration and maintenance (OAM) messaging channel; principles and signalling mechanism of the upstream dynamic bandwidth assignment; optical network unit (ONU) activation method; forward error correction; security. This Recommendation forms an integral part of the G.98
11、4-series of ITU-T Recommendations that, together, specify a single coherent set of access transmission systems. History Edition Recommendation Approval Study Group Unique ID*1.0 ITU-T G.984.3 2004-02-22 15 11.1002/1000/7072-en 1.1 ITU-T G.984.3 (2004) Amd. 1 2005-07-14 15 11.1002/1000/8544-en 1.2 IT
12、U-T G.984.3 (2004) Amd. 2 2006-03-29 15 11.1002/1000/8764-en 1.3 ITU-T G.984.3 (2004) Amd. 3 2006-12-14 15 11.1002/1000/8987-en 2.0 ITU-T G.984.3 2008-03-29 15 11.1002/1000/9381-en 2.1 ITU-T G.984.3 (2008) Amd. 1 2009-02-13 15 11.1002/1000/9673-en 2.2 ITU-T G.984.3 (2008) Amd. 2 2009-11-13 15 11.100
13、2/1000/10405-en2.3 ITU-T G.984.3 (2008) Amd. 3 2012-04-22 15 11.1002/1000/11496-en3.0 ITU-T G.984.3 2014-01-13 15 11.1002/1000/12099-en_ *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example,
14、 http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.984.3 (01/2014) 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 Standardizat
15、ion Sector (ITU-T) is a permanent organ 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 mee
16、ts every four years, establishes the 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
17、purview, the necessary standards are 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
18、voluntary. However, the Recommendation 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“ a
19、nd the negative equivalents are used 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 in
20、volve the use of a claimed Intellectual 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 Re
21、commendation, ITU had received notice 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
22、http:/www.itu.int/ITU-T/ipr/. ITU 2014 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.984.3 (01/2014) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhe
23、re 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 4 5 Conventions and terminology . 8 5.1 ONT and ONU . 9 5.2 Data encapsulation method and deprecation of ATM transport . 9 5.3 Traffic monitoring versus non-status-reporting 9 5.4 Bandwidth assignment versus bandwidth all
24、ocation 9 5.5 G-PON time division multiplexing architecture . 10 5.6 Disambiguation of the concept of frame 12 5.7 Concepts associated with upstream physical layer overhead . 13 6 G-PON system architecture 13 6.1 Network architecture and reference configuration . 13 6.2 Parameters of the GTC layer 1
25、3 6.3 Functional blocks 14 6.4 Interoperability between G-PON and B-PON 15 7 G-PON transmission convergence layer overview . 15 7.1 GTC protocol stack . 15 7.2 GTC key functions . 18 7.3 Functions of Sublayers in GTC 19 7.4 Dynamic bandwidth assignment . 20 7.5 Resource allocation and quality of ser
26、vice (QoS) 28 8 GTC layer framing 29 8.1 Downstream GTC frame structure . 29 8.2 Upstream burst structure . 35 8.3 Mapping of GEM frames into GTC payload 38 8.4 Status reporting DBA signalling and configuration . 41 9 GTC messages 45 9.1 PLOAM message format 45 9.2 Control messages 46 10 Activation
27、method 64 10.1 Overview 64 10.2 Activation mechanism at the ONU . 65 10.3 OLT support of the activation process . 73 iv Rec. ITU-T G.984.3 (01/2014) Page 10.4 OLT and ONU timing relationships . 75 10.5 Power levelling . 83 11 Alarms and performance monitoring 83 11.1 Alarms 83 11.2 Performance monit
28、oring . 89 12 Security . 90 12.1 Basic threat model 90 12.2 Encryption system 90 12.3 Data encryption key exchange 92 12.4 Data encryption key switch-over 92 13 Forward error correction . 93 13.1 Introduction 93 13.2 Downstream FEC . 94 13.3 Upstream FEC 97 13.4 ONU activation transmissions 99 14 OM
29、CI transport mechanism . 100 14.1 OMCI transport schema . 100 14.2 OMCI adapters . 100 Annex A Implementers guide for Recommendation ITU-T G.984.3 101 A.1 Introduction 101 A.2 AES mechanism and golden vectors 101 A.3 FEC encoding golden vector 104 A.4 Scrambler diagram 105 A.5 A downstream frame exa
30、mple 105 A.6 ONU activation process 106 A.7 PLOAM messages 113 A.8 Transmitter block diagram . 114 Annex B Enhanced Security Capabilities . 115 B.1 Introduction 115 B.2 Secure mutual authentication and data key encryption 115 B.3 G-PON systems with reduced data encryption strength . 116 Annex C PON-
31、ID maintenance. 118 C.1 Introduction 118 C.2 PON-ID PLOAM message . 118 Annex D PLOAM channel enhancements 120 D.1 Introduction 120 D.2 New downstream PLOAM message types . 120 D.3 New downstream PLOAM message descriptions 121 D.4 Modified activation state diagram 121 Rec. ITU-T G.984.3 (01/2014) v
32、Page Annex E ONU Power Management 123 E.1 Introduction 123 E.2 PLOAM channel modification . 124 E.3 Bandwidth map flag modification 125 E.4 Alarm modification 125 E.5 ONU power management protocol . 126 Appendix I Transport of user traffic over GEM channels 136 I.1 Mapping of GEM frames into the GTC
33、 payload 136 I.2 TDM over GEM . 136 I.3 Ethernet over GEM . 137 I.4 SDH over GEM 138 I.5 IP over GEM . 139 I.6 MPLS over GEM 140 Appendix II Survivability in GTC-based systems 141 Appendix III GEM header error control decoding 142 Appendix IV OLT activation procedures overview 144 IV.1 Common part 1
34、44 IV.2 ONU-specific part 147 IV.3 Automatic ONU Discovery Method . 149 IV.4 POPUP process . 149 Appendix V Downstream line data pattern conditioning 151 V.1 Idle pattern control . 151 V.2 Intentional PON disruption . 153 Appendix VI ONU registration methods 154 VI.1 Authentication by serial number
35、154 VI.2 Authentication by PLOAM password 154 VI.3 Other forms of authentication . 154 Appendix VII Time of day derivation and error analysis . 155 Bibliography. 159 Rec. ITU-T G.984.3 (01/2014) 1 Recommendation ITU-T G.984.3 Gigabit-capable passive optical networks (G-PON): Transmission convergence
36、 layer specification 1 Scope This Recommendation is intended to: Describe flexible access networks using optical fibre technology. The focus is primarily on a network to support services including plain old telephone service (POTS), data, video, leased line and distributive services. Describe charac
37、teristics of a passive optical network (PON) with the capability of transporting various services between the user-network interface and the service node interface. Concentrate on the fibre issues. The copper issues of hybrid systems are described elsewhere, e.g., x digital subscriber loop (xDSL) st
38、andardization. Cover transmission convergence (TC) issues between the service node interface and the user-network interface. Deal with specifications for frame format, media access control method, ranging method, operation, administration and maintenance (OAM) functionality and security in G-PON net
39、works. Include optical access network (OAN) registration method, Time-of-Day distribution method, PON-ID maintenance capability. Include protocol-based optical network unit (ONU) power management specification. 2 References The following ITU-T Recommendations and other references contain provisions
40、which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility o
41、f applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations 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.
42、 ITU-T G.707 Recommendation ITU-T G.707/Y.1322 (2007), Network node interface for the synchronous digital hierarchy (SDH). ITU-T G.983.1 Recommendation ITU-T G.983.1 (2005), Broadband optical access systems based on Passive Optical Networks (PON). ITU-T G.983.4 Recommendation ITU-T G.983.4 (2001), A
43、 broadband optical access system with increased service capability using dynamic bandwidth assignment. ITU-T G.983.5 Recommendation ITU-T G.983.5 (2002), A broadband optical access system with enhanced survivability. ITU-T G.984.1 Recommendation ITU-T G.984.1 (2008), Gigabit-capable passive optical
44、networks (G-PON): General characteristics. 2 Rec. ITU-T G.984.3 (01/2014) ITU-T G.984.2 Recommendation ITU-T G.984.2 (2003), Gigabit-capable Passive Optical Networks (G-PON): Physical Media Dependent (PMD) layer specification. ITU-T G.988 Recommendation ITU-T G.988 (2012), Optical network unit manag
45、ement and control interface specification. ITU-T I.432.1 Recommendation ITU-T I.432.1 (1999), B-ISDN user-network interface Physical layer specification: General characteristics. FIPS 81 Federal Information Processing Standard 81 (1980), DES Modes of Operation. FIPS 140-2 Federal Information Process
46、ing Standard 140-2 (2001), Security Requirements for cryptographic modules. FIPS 197 Federal Information Processing Standard 197 (2001), Advanced Encryption Standard (ANS). NIST SP800-38A NIST Special Publication 800-38A (2001), Recommendation for Block Cipher Modes of Operation Methods and Techniqu
47、es. 3 Definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 activation: A set of distributed procedures executed by the optical line termination (OLT) and the optical network units (ONUs) that allows an inactive
48、ONU to join or resume operations on the passive optical network (PON). The activation process includes three phases: parameter learning, serial number acquisition and ranging. 3.2.2 bandwidth allocation: An upstream transmission opportunity granted by the optical line termination (OLT) for the durat
49、ion of the specified time interval to the specified traffic-bearing entity within an optical network unit (ONU). 3.2.3 C/M-plane: A plane of the gigabit-capable passive optical network (G-PON) protocol suite that handles control and management information in a G-PON system. Data on optical network unit management and control interface (OMCI) is transferred through this plane. 3.2.4 dynamic bandwid
