1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.983.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2005) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Optical line systems for local and access networks Broadband optical access sy
2、stems based on Passive Optical Networks (PON) ITU-T Recommendation G.983.1 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 CARRIER-TRANSMISSION SYSTE
3、MS 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 OF RADIOTELEPHONY AND
4、LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA 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.910G.919 Digital sections at hierarchical bit
5、 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 digital transmission systems for customer
6、access to ISDN G.960G.969 Optical fibre submarine cable systems G.970G.979 Optical line systems for local and access networks G.980G.989 Access networks G.990G.999 QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DIGITAL
7、 TERMINAL EQUIPMENTS G.7000G.7999 DIGITAL NETWORKS G.8000G.8999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. G.983.1 (01/2005) i ITU-T Recommendation G.983.1 Broadband optical access systems based on Passive Optical Networks (PON) Summary This Recommendation des
8、cribes a flexible optical fibre access network capable of supporting the bandwidth requirements of narrowband and broadband services. This Recommendation describes systems with nominal downstream line rates of 155.52, 622.08 and 1244.16 Mbit/s, and nominal upstream line rates of 155.52 and 622.08 Mb
9、it/s. Both symmetrical and asymmetrical systems are described. This Recommendation proposes the physical layer requirements and specifications for the physical media dependent layer, the TC layer and the ranging protocol of an ATM-based Broadband Passive Optical Network (B-PON). This revised version
10、 of G.983.1 incorporates the material from: G.983.1 (1998), G.983.1 Cor.1 (1999), G.983.1 Amd.1 (2001), G.983.1 Cor.1 Erratum 1 (2002), G.983.1 Amd.2 (2003), G.983.1 Implementors Guide (2003). Source ITU-T Recommendation G.983.1 was approved on 13 January 2005 by ITU-T Study Group 15 (2005-2008) und
11、er the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. G.983.1 (01/2005) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T
12、 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 the topics for study
13、 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 are prepared on a co
14、llaborative 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 Recommendation may contain ce
15、rtain 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 to express requir
16、ements. 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 Intellectual Property Right
17、. 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 received notice of intellectual
18、property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2005 All rights reserved. No part of this publicatio
19、n may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. G.983.1 (01/2005) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Abbreviations 2 4 Definitions 4 5 Architecture of the optical access network. 5 5.1 Network architecture 5 5.2 Reference configuration
20、 . 7 5.3 Functional blocks 8 5.4 ONU functional block 8 5.5 Optical Line Termination functional block 9 5.6 Optical Distribution Network functional block 10 6 Services. 12 7 User Network Interface and Service Node Interface 12 8 Optical network requirements. 13 8.1 Layered structure of optical netwo
21、rk 13 8.2 Physical medium dependent layer requirements for the ATM-PON . 13 8.3 Transmission Convergence layer requirements for the ATM-PON. 28 8.4 Ranging method 71 9 Operations, Administration and Maintenance (OAM) functionality 91 10 Performance 91 11 Environmental condition 92 12 Safety 92 12.1
22、Electrical safety and protection 92 12.2 Optical safety and protection 92 Appendix I Optional cases of overall minimum ORL of ODN at Oruand Ord, and Oldand Olu. 92 I.1 Introduction 92 I.2 Effect of open connectors located at ONU side of star coupler . 92 I.3 Effect of open connectors located at OLT
23、side of star coupler 93 I.4 Effect of disconnecting a connector near ONU 93 Appendix II Effect of optical return loss of ODN 94 II.1 Introduction 94 II.2 ODN optical return loss of 32 dB. 94 II.3 Other case of ODN reflectance. 98 Appendix III Ranging flow diagrams . 100 III.1 Ranging flow in the ONU
24、 (example) . 100 III.2 Ranging flow in the OLT (example) 107 iv ITU-T Rec. G.983.1 (01/2005) Page Appendix IV Access network survivability 113 IV.1 Introduction 113 IV.2 Possible switching types. 113 IV.3 Possible duplex ATM-PON configurations and characteristics. 113 IV.4 Requirements 115 IV.5 Requ
25、ired information fields for PLOAM cell 116 ITU-T Rec. G.983.1 (01/2005) 1 ITU-T Recommendation G.983.1 Broadband optical access systems based on Passive Optical Networks (PON) 1 Scope This Recommendation is intended to describe flexible access networks using optical fibre technology. The focus is pr
26、imarily on a network to support services with a bandwidth requirement greater than ISDN basic rate; it would include video and distributive services. This Recommendation describes characteristics of an Optical Access Network (OAN) with the capability of transporting various services between the user
27、-network interface and the Service node interface. The OAN described in this Recommendation should enable the network operator to provide a flexible upgrade to meet future customer requirements, in particular in the area of the Optical Distribution Network (ODN). The ODN considered is based on point
28、-to-multipoint tree and branch option. This Recommendation concentrates on the fibre issues; the copper issues of hybrid systems are described elsewhere, e.g., xDSL standardization. This Recommendation covers issues between the Service node interface and the User network. Although this Recommendatio
29、n concentrates on issues relating to ATM over a passive optical network, other solutions are not precluded. This Recommendation proposes the physical layer requirements and specifications for the physical media dependent layer, the TC layer and the ranging protocol of an ATM-based Broadband Passive
30、Optical Network (B-PON). This Recommendation is part of the G.983.x series. The other major components of this series include: G.983.2 (2002), ONT management and control interface specification for B-PON. G.983.3 (2001), A broadband optical access system with increased service capability by waveleng
31、th allocation. G.983.4 (2001), A broadband optical access system with increased service capability using dynamic bandwidth assignment. G.983.5 (2001), A broadband optical access system with enhanced survivability. 2 References The following ITU-T Recommendations and other references contain provisio
32、ns 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; all users of this Recommendation are therefore encouraged to investigate the possib
33、ility of 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 Recommen
34、dation. 1 ITU-T Recommendation G.652 (2003), Characteristics of a single-mode optical fibre cable. 2 ITU-T Recommendation G.671 (2005), Transmission characteristics of optical components and subsystems. 2 ITU-T Rec. G.983.1 (01/2005) 3 ITU-T Recommendation G.783 (2004), Characteristics of synchronou
35、s digital hierarchy (SDH) equipment functional blocks. 4 ITU-T Recommendation G.902 (1995), Framework Recommendation on functional access networks (AN) Architecture and functions, access types, management and service node aspects. 5 ITU-T Recommendation G.957 (1999), Optical interfaces for equipment
36、s and systems relating to the synchronous digital hierarchy. 6 ITU-T Recommendation G.958 (1994), Digital line systems based on the synchronous digital hierarchy for use on optical fibre cables. 7 ITU-T Recommendation G.982 (1996), Optical access networks to support services up to the ISDN primary r
37、ate or equivalent bit rates. 8 ITU-T Recommendation I.321 (1991), B-ISDN protocol reference model and its application. 9 ITU-T Recommendation I.326 (2003), Functional architecture of transport networks based on ATM. 10 ITU-T Recommendation I.356 (2000), B-ISDN ATM layer cell transfer performance. 11
38、 ITU-T Recommendation I.361 (1999), B-ISDN ATM layer specification. 12 ITU-T Recommendation I.432.1 (1999), B-ISDN user-network interface Physical layer specification: General characteristics. 13 ITU-T Recommendation I.610 (1999), B-ISDN operation and maintenance principles and functions. 14 ITU-T R
39、ecommendation I.732 (2000), Functional characteristics of ATM equipment. 15 Federal Information Processing Standard No. 197 (2001), Advanced Encryption Standard (AES), National Institute of Standards and Technology. 16 ITU-T Recommendation G.983.2 (2002), ONT management and control interface specifi
40、cation for B-PON. 17 ITU-T Recommendation G.983.3 (2001), A broadband optical access system with increased service capability by wavelength allocation. 18 ITU-T Recommendation G.983.4 (2001), A broadband optical access system with increased service capability using dynamic bandwidth assignment. 19 I
41、TU-T Recommendation G.983.5 (2002), A broadband optical access system with enhanced survivability. 3 Abbreviations This Recommendation uses the following abbreviations: AES Advanced Encryption Standard AF Adaptation Function APS Automatic Protection Switching ATM Asynchronous Transfer Mode BER Bit E
42、rror Ratio BIP Bit Interleaved Parity B-ISDN Broadband Integrated Services Digital Network ITU-T Rec. G.983.1 (01/2005) 3 B-PON Broadband Passive Optical Network CID Consecutive Identical Digit CPE Cell Phase Error CRC Cyclic Redundancy Check DSL Digital Subscriber Line ECB Electronic Code Book E/O
43、Electrical/Optical FP-LD Fabry-Perot Laser Diode FTTB/C Fibre to the Building/Curb FTTCab Fibre to the Cabinet FTTH Fibre to the Home HEC Header Error Control IEC International Electrotechnical Commission ISDN Integrated Services Digital Network LAN Local Area Network LCD Loss of Cell Delineation LC
44、F Laser Control Field LSB Least Significant Bit LT Line Terminal MAC Media Access Control MLM Multi-Longitudinal Mode MSB Most Significant Bit NRZ Non Return to Zero NT Network Termination O/E Optical/Electrical OAM Operations, Administration and Maintenance OAN Optical Access Network ODF Optical Di
45、stribution Frame ODN Optical Distribution Network OLT Optical Line Termination OMCC ONT Management and Control Channel OMCI ONT Management and Control Interface ONT Optical Network Termination ONU Optical Network Unit OpS Operations System ORL Optical Return Loss PLOAM Physical Layer OAM 4 ITU-T Rec
46、. G.983.1 (01/2005) PON Passive Optical Network PRBS Pseudo-Random Bit Sequence PST PON Section Trace PSTN Public Switched Telephone Network QoS Quality of Service RAU Request Access Unit RMS Root Mean Square RXCF Receiver Control Field SDH Synchronous Digital Hierarchy SLM Single-Longitudinal Mode
47、SN Serial Number SNI Service Node Interface TC Transmission Convergence TDMA Time Division Multiple Access UI Unit Interval UNI User Network Interface UPC Usage Parameter Control VC Virtual Channel VP Virtual Path VPI Virtual Path Identifier WDM Wavelength Division Multiplexing 4 Definitions This Re
48、commendation defines the following terms: 4.0 Broadband PON: A term used to refer to the entire system described by the G.983.x family of ITU-T Recommendations. This includes a wide range of broadband services, and goes beyond ATM access. For this reason, B-PON supersedes the older usage of ATM-PON.
49、 4.1 churning: A function which can be applied to the downstream user data from an OLT to its ONUs. Churning provides the necessary function of data scrambling and offers a low level of protection for data confidentiality. It is installed at the TC layer of the ATM-PON system and can be activated for point-to-point downstream connections. 4.2 diplex working: Bidirectional communication using a different wavelength for each direction of transmission over a single fibre. 4.3 duplex working: Bidirectional com
