1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.983.6TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2002) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Optical line systems for local and access networks ONT management and control
2、interface specifications for B-PON system with protection features ITU-T Recommendation G.983.6 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 CARRI
3、ER-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 O
4、F RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TESTING EQUIPMENTS G.500G.599 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 syst
5、ems G.910G.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 sec
6、tion and 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.989 Access networks G.990G.999 QUALITY OF SERVICE AND PERFORMANCE G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.
7、6000G.6999 DIGITAL 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.983.6 (06/2002) i ITU-T Recommendation G.983.6 ONT management and control interface specifications for B-PON system with protection f
8、eatures Summary This Recommendation describes the optical network terminal management and control interface (OMCI) specifications for broadband passive optical networks (B-PONs). In order to provide support for protected B-PON systems specified in ITU-T Rec. G.983.5 “A broadband optical access syste
9、m with enhanced survivability,“ additional OMCI specifications are required. This Recommendation describes the enhanced OMCI specifications for a B-PON system with protection features. The enhancements described include the addition of protection-related attributes to existing managed entities, mana
10、ged entity relations diagrams for protected systems, and detailed scenarios for OMCI start-up/tear-down/switch-over and for virtual path (VP) configuration/removal in protected B-PON systems. Source ITU-T Recommendation G.983.6 was prepared by ITU-T Study Group 15 (2001-2004) and approved under the
11、WTSA Resolution 1 procedure on 13 June 2002. ii ITU-T Rec. G.983.6 (06/2002) 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
12、-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 the topics for stu
13、dy 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
14、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. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or i
15、mplementation of this Recommendation may involve 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 pro
16、cess. As of the date of approval of this Recommendation, ITU had received notice of intellectual 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 u
17、rged to consult the TSB patent database. ITU 2002 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. G.983.6 (06/2002) iii CONTENTS Page 1 Scope 1 2 References 1 3 Abbreviations . 1 4 Reference model an
18、d terms 2 4.1 OMCI reference models for protected B-PON systems. 2 4.2 ONT functions 3 4.3 VP Mux functionality in the ONT 5 5 Requirements of the management interface specification 5 5.1 Configuration management 5 5.2 Fault management 5 5.3 Performance management 5 5.4 Security management . 5 6 Pro
19、tocol-independent MIB for the OMCI 5 6.1 Managed Entities 5 6.2 Managed entity relation diagrams 5 7 MIB description 7 7.1 ANI Management. 7 7.1.1 PON TC Adapter 7 Appendix I Start-up sequence. 9 I.1 OMCC establishment protection side ranged after start-up of working side . 9 I.2 OMCC establishment
20、for simultaneous ranging of working and protection PON-LTs 10 I.3 VP configuration for the ONT defined as 1+1 model 11 I.4 VP configuration for the ONT defined as 1:1 model. 12 I.5 VP removal for 1+1 model ONT . 13 I.6 VP removal for a 1:1 model ONT 14 I.7 Switch-over sequence for a 1+1 model ONT. 1
21、5 I.8 Switch-over sequence for a 1:1 model ONT 16 ITU-T Rec. G.983.6 (06/2002) 1 ITU-T Recommendation G.983.6 ONT management and control interface specifications for B-PON system with protection features 1 Scope This Recommendation focuses on the OMCI specifications related to B-PON systems with pro
22、tection features as defined by ITU-T Rec. G.983.5. Though the OMCI specifications are based on ITU-T Rec. G.983.2, some enhancements are needed. The scope of this Recommendation is limited to the enhancements only. This Recommendation describes the following: the ONT model and MIB relation diagrams;
23、 new attributes for some existing managed entities; OMCI start-up, tear-down, and switch-over scenarios and protected VP configuration and removal scenarios (Appendix I). 2 References The following ITU-T Recommendations contain provisions which, through reference in this text, constitute provisions
24、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 of applying the most recent edition of the Recommendations and
25、 other references listed below. A list of currently valid ITU-T Recommendations is regularly published. 1 ITU-T Recommendation G.983.1 (1998), Broadband optical access systems based on Passive Optical Networks (PON). Also refer to Corrigendum 1 (1999). 2 ITU-T Recommendation G.983.2 (2002), ONT mana
26、gement and control interface specification for B-PON. 3 ITU-T Recommendation G.983.5 (2002), A broadband optical access system with enhanced survivability. 3 Abbreviations This Recommendation uses the following abbreviations: ANI Access Node Interface ATM Asynchronous Transfer Mode B-ISDN Broadband
27、Integrated Services Digital Network B-PON Broadband Passive Optical Network FTTB Fibre to the Building FTTBusiness Fibre to the Business FTTC Fibre to the Curb FTTCab Fibre to the Cabinet FTTH Fibre to the Home LT Line Terminal 2 ITU-T Rec. G.983.6 (06/2002) ME Managed Entity MIB Management Informat
28、ion Base OLT Optical Line Terminal OMCI ONT Management and Control Interface ONT Optical Network Terminal PON Passive Optical Network PPTP Physical Path Termination Point UNI User Network Interface VC Virtual Channel VP Virtual Path 4 Reference model and terms 4.1 OMCI reference models for protected
29、 B-PON systems The reference model for an unprotected B-PON system is described in 4.1/G.983.2 and Figure 1/G.983.2. This clause describes reference models for protected B-PON systems. Three reference logical models are possible. Models 1 and 2 correspond to protection architectures described in ITU
30、-T Rec. G.983.5. Model 3 describes an additional protection scheme option. 1) Reference model-1 In this model, the termination point of the OMCI is common between the working side and the protection side (Figure 1). The OMCI specifications are described in this Recommendation. G.983.6F01ONTTerminati
31、on of common OMCIPON-LT(0)PON-LT(1)OLTTEPON-LT(0)PON-LT(1)Figure 1/G.983.6 Reference model-1 ITU-T Rec. G.983.6 (06/2002) 3 2) Reference model-2 In this model, the OMCI has two distinct termination points: one for the working side and one for the protection side (Figure 2). The OMCI specifications a
32、re the same as those described in ITU-T Rec. G.983.2. G.983.6F02ONTTermination of common OMCI on working sidePON-LT(0)PON-LT(1)OLTTEPON-LT(0)PON-LT(1)Termination of common OMCI on protection sideFigure 2/G.983.6 Reference model-2 3) Reference model-3 In this model, the OMCI has two distinct terminat
33、ion points: one for the working side and one for the protection side. In addition, this model includes separate ONTs for the working side and the protection side (Figure 3). The OMCI specifications for this model are the same as those for reference model 2. G.983.6F03ONT (working)Termination of comm
34、on OMCI on working sidePON-LTPON-LTOLTTEPON-LTPON-LTTermination of common OMCI on protection sideONT (protection)Figure 3/G.983.6 Reference model-3 4.2 ONT functions The functions in the whole ONT are described in 4.2/G.983.2 and Figure 2/G.983.2. This clause focuses on the ANI side in the ONT. Acco
35、rding to ITU-T Rec. G.983.5, there are two types of protection architecture: 1+1 architecture and 1:1 architecture. Thus, two models can be considered when describing the relationship between ONT features and protection features. 4 ITU-T Rec. G.983.6 (06/2002) 1) 1+1 model Figure 4 shows a 1+1 model
36、 ONT. In this model, the traffic in the working entity and the traffic in the protection entity are the same. The TC Adaptor provides the same traffic to the working PON-LT and the protection PON-LT. G.983.6F04PON PPTP ANIWorkingTC AdaptorPON PPTP ANIProtectionAN-LTFigure 4/G.983.6 1+1 model ONT (AN
37、I side) 2) 1:1 model Figure 5 shows a 1:1 model ONT. In this model, extra traffic can be supported. The working entity conveys the traffic in normal operation. If the working entity has failed or a forced switch/manual switch to the protection entity operation has been carried out, only the protecti
38、on entity conveys the traffic. The TC Adaptor for normal traffic provides the traffic to the working PON-LT when the working PON-LT is enabled. The TC Adaptor for normal traffic provides the traffic to the protection entity when the working PON-LT is disabled. The TC Adaptor for extra traffic provid
39、es the extra traffic to the protection entity only when the working entity is enabled. G.983.6F05PON PPTP ANIWorkingTC Adaptor (normal)PON PPTP ANIProtectionAN-LTTC Adaptor (extra)Figure 5/G.983.6 1:1 model ONT (ANI side) ITU-T Rec. G.983.6 (06/2002) 5 4.3 VP Mux functionality in the ONT See 4.3/G.9
40、83.2. 5 Requirements of the management interface specification See clause 5/G.983.2. 5.1 Configuration management See 5.1/G.983.2. 5.2 Fault management See 5.2/G.983.2. 5.3 Performance management See 5.3/G.983.2. 5.4 Security management See 5.4/G.983.2. 6 Protocol-independent MIB for the OMCI See cl
41、ause 6/G.983.2. 6.1 Managed Entities See 6.1/G.983.2. 6.2 Managed entity relation diagrams Figures 6 and 7 show the managed entity relation diagrams related to B-PON systems with protection features as defined by ITU-T Rec. G.983.5. Figure 6 shows an ONT with cardholders on both UNI and ANI sides. F
42、igure 7 shows the ATM VP cross connection function. The relationship between the “PON TC Adaptor“ managed entity and the “PON Physical Path Termination Point“ managed entity is modified from that given in Figures 3 and 4/G.983.2. The “PON TC Adaptor“ managed entity is associated with one or two “PON
43、 Physical Path Termination Point“ managed entities. 6 ITU-T Rec. G.983.6 (06/2002) G.983.6F06SW Image1ONTB-PON202011127125511112711255 1255032 1Subscriber linecardholder02ONT Data0111255 12550321Downstream priorityqueueB-PONSubscriber linecardPON IF linecardholderUpstreampriority queueB-PONPON IF li
44、ne cardorUNIB-PON1111Physical pathtermination pointTC AdaptorB-PONPON TC adaptor ANI11112 1PON physical pathtermination point111111Figure 6/G.983.6 Managed entity relation diagram for non-integrated interfaces ITU-T Rec. G.983.6 (06/2002) 7 G.983.6F07ONTB-PONUNIB-PON04096PON TC Adaptor ANI0256040961
45、120409611010101xorThreshold dataB-PON040961040960256 1ATM VP cross-connectionDownstream priority queueB-PONVP Network CTPB-PON(UNI side)TC AdaptorB-PON1Traffic Descriptor*UPC Disagreement Monitoring HistoryDataB-PONPhysical PathTermination PointPON Physical PathTermination PointVP Network CTPB-PON(A
46、NI side)Upstream Priority QueueB-PON11101xor10111111Figure 7/G.983.6 Managed entity relation diagram, ATM service The “*“ in Figure 7 indicates that the Traffic Descriptor can be one of the specific Traffic Descriptor managed entities defined in 7.5.2/G.983.2. 7 MIB description Use of protection fea
47、tures causes the modification of some managed entities from ITU-T Rec. G.983.2. In this clause, only modified managed entities are described. Other managed entities are referred to in ITU-T Rec. G.983.2. 7.1 ANI Management Note that this clause corresponds to 7.2/G.983.2. 7.1.1 PON TC Adapter Note t
48、hat this clause corresponds to 7.2.3/G.983.2. An instance of this managed entity represents a point in the ONT where the adaptation of the ATM layer to the underlying physical infrastructure (i.e., the PON) takes place. One instance of this managed entity shall exist for each ONT. 8 ITU-T Rec. G.983
49、.6 (06/2002) An instance of this managed entity is automatically created by the ONT after initialization. However, this instance will not be reported during an MIB upload. New attributes for protection features are included in this management entity. Relationships One instance of this managed entity is associated with one or two instances of the PON Physical Path Termination Point managed entity. Attributes Managed Entity id: This attribute provides a unique number for each instance of this managed entity. The assigned number is t
