1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.983.7 (1 1/2001) 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 contr
2、ol interface specification for dynamic bandwidth assignment (DBA) B-PON system ITU-T Recommendation G.983.7 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS TRANSMISSION SYSTEMS GENERAL CHARACTERISTICS COMMON
3、 TO ALL ANALOGUE CARRIER- INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE METALLIC LINES COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY TESTING EQUIPMENTS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL
4、TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS AND DIGITAL LINE SYSTEM SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH General Parameters for optical fibre cable systems Digital sections at hierarchical bit rates based on a bit rate of 2048 kbitls Digital line transmission
5、systems on cable at non-hierarchical bit rates Digital line systems provided by FDM transmission bearers Digital line systems Digital section and digital transmission systems for customer access to ISDN G.lOO-G.199 G.20O-G.299 G.30O-G.399 G.40O-G.449 G.45O-G.499 G.50O-G.599 G.60O-G.699 G.70O-G.799 G
6、.80O-G.899 G.90O-G.999 G.90O-G.909 G.91O-G.919 G.92O-G.929 G.930-G.939 G.940-G.949 G.950-G.959 G.96O-G.969 Optical fibre submarine cable systems G.97O-G.979 Access networks G.99O-G.999 Csl s fo cces Forfirther details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation G.983.7 O
7、NT MANAGEMENT AND CONTROL INTERFACE SPECIFICATION FOR DYNAMIC BANDWIDTH ASSIGNMENT BA) B-PON SYSTEM ( Summary This Recommendation describes the ONT management and control interface (OMCI) specifications required for the Dynamic Bandwidth Assignment BA) function in a Broadband Passive Optical Network
8、 -PON) system. This Recommendation builds on the core functions specified in ITU-T G.983.2 and specifies managed entities of a protocol-independent Management Information Base (MIB) that models the exchange of information between OLT and ONT. Source ITU-T Recommendation G.983.7 was prepared by ITU-T
9、 Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 November 200 1. ITU-T Rec. 6.983.7 (11/2001) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standard
10、ization 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
11、 meets 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
12、-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 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 dr
13、aws attention to the possibility that the practice or implementation 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 IT members o
14、r others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not rep
15、resent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2002 Ail rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission
16、 in writing from ITU. ii ITU-T RC. G.983.7 (11/2001) . CONTENTS Page 1 2 3 4 4.1 4.2 4.3 5 5.1 5.2 5.3 5.4 6 6.1 6.2 7 7.1 7.2 7.3 Scope . References . Abbreviations Reference model and terms . OMCI in ITU-T G.983.4 . ONT functions VP Mux functionality in the ONT Requirements of the management inter
17、face specification Configuration management . Fault management . Performance management . Security management Protocol-independent MIB for the OMCI Managed entities associated with DBA function Managed entities relation diagrams MIB description ONT equipment management . 7.1.1 ONTAPON 7.1.2 PON IF l
18、ine card ANI management 7.2.1 ANI 7.2.2 T-CONT buffer Traffic management 7.3.1 Priority QueueAPON . 7.3.2 Traffic Scheduler . 8 ONT management and control channel (OMCC) . 9 ONT management and control protocol . Appendix I . DBA related sequence scenario . I . 1 Initial handshake . 1.2 Addition of T
19、-CONT in an ONT 1.3 Deletion of T-CONT in an ONT . Appendix II - An example ofthe Traffic Scheduler configuration . ITU-T Rec . 6.983.7 (11/2001) 1 1 1 2 2 2 4 4 7 7 7 8 9 9 10 11 11 12 14 14 14 14 15 16 17 iii ITU-T Recommendation G.983.7 ONT MANAGEMENT AND CONTROL INTERFACE SPECIFICATION FOR DYNAM
20、IC BANDWIDTH ASSIGNMENT BA) B-PON SYSTEM 1 Scope This Recommendation describes the OMCI specifications required for the Dynamic Bandwidth Assignment (DBA) function in a Broadband Passive Optical Network (B-PON) system. The OMCI specifications are based on and complement the core functionality descri
21、bed in IT-T G.983.2. This Recommendation describes the ONT/ONU model and MIE3 relation diagrams. It further describes the additional managed entities in order to speciQ the T-CONT buffer and schedule functions. Moreover, some existing managed entities are augmented with new attributes. Appendix I de
22、scribes the initial handshake and addition or deletion scenarios of T-CONT buffers. 2 References The following IT-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 i
23、ndicated 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 other references listed below. A list of the currently valid IT-T
24、 Recommendations is regularly published. References cited in ITU-T G.983.1 and G.983.2 are also applied to this Recommendation but are not reproduced to avoid redundancy. i ITU-T G.983.1 (1 998), Broadband optical access systems based on Passive Optical Networks (PON). Also refer to the Corrigendum
25、1 (June, 1999). 2 ITU-T G.983.2 (2000), ONT management and control interface specijcation for ATMPON. 3 ITU-T G.983.4 (2001), A broadband optical access system with increased service capability using dynamic bandwidth assignment. 3 Abbreviations This Recommendation uses the following abbreviations:
26、AAL ANI ATM B-ISDN B-PON CRC DBA FTTB FTTBusiness ATM Adaptation Layer Access Node Interface Asynchronous Transfer Mode Broadband Integrated Services Digital Network Broadband Passive Optical Networks Cyclic Redundancy Check Dynamic Bandwidth Assignment Fibre to the Building Fibre to the Business IT
27、U-T Rec. 6.983.7 (11/2001) 1 FTTC FTTCab FTTH HOL ME MIB OAM OLT OMCI ONT PON QOS UNI vc VP WRR Fibre to the Curb Fibre to the Cabinet Fibre to the Home Head of the Line Managed Entity Management Information Base Operation, Administration and Maintenance Optical Line Termination ONT Management and C
28、ontrol Interface Optical Network Termination Passive Optical Network Quality of Service User Network Interface Virtual Channel Virtual Path Weighted Round Robin 4 Reference model and terms 4.1 OMCI in ITU-T 6.983.4 See 4.UG.983.2. 4.2 ONT functions The functions in the whole ONT are described in 4.2
29、/G.983.2 and Figure 2/G.983.2. This clause focuses on the ANI side in the ONT. A T-CONT buffer managed entity is introduced in order to speciQ the DBA function. T-CONT buffer can contain Priority Queues and Trafic Schedulers and be associated with the TC Adapter. Two models are considered as to the
30、association between the T-CONT buffers and Priority Queues or Traffic Schedulers. In model 1, the Priority Queues, Trafic Schedulers and the T-CONT Buffers are inherently associated with each other in a fixed fashion. In model 2, the Priority Queues, Traffic Schedulers and T-CONT buffers can be asso
31、ciated flexibly. Figures 1 and 2 show the two models. 2 ITU-T RC. 6.983.7 (11/2OO1) ONT T-CONT Buffer - TC 1 2 -+ 3 -+ 4 -+ 5 -+ Adaptor PONPPTP I I I T-CONT Buffer 1 3 14 - 5 /6 I /7 I I ANI PON PPTP o ANI T1544540-01 Figure UG.983.7 - ONT model 1 I ONT T-CONTBuffer TC U ANI I Tl544550-01 Figure 2/
32、G.983.7 - ONT model 2 The simplest and default configuration is for the Priority Queues and T-CONT buffers. This can guarantee the minimum delay of traffic assuming enough bandwidth is provided for the ONT. Optionally, one or more stages of WRR andor HOL scheduling can be installed in order to pante
33、e minimum bandwidths, classes of services, and other traffic controls. A multi-stage Traffic Scheduler can be implemented as shown in Figure 3 as an example. ITU-T Rec. G.983.7 (11/2001) 3 ONT TC PON PPTP ANI Ti 5445-O1 Figure 3/G.983.7 - ONT model with traffic scheduler 4.3 See clause 4/G.983.2. VP
34、 Mux functionality in the ONT 5 See clause YG.983.2. Requirements of the management interface specification 5.1 Configuration management Configuration management provides functions to exercise control over, identify, collect data from and provide data for the ONT. This involves the following: 1) Con
35、fguration of equipment. 2) Configuration of the UNIS. 3) 4) 5) 6) 7) Configuration of AAL profiles. 8) Configuration of service profiles. 9) Configuration of traffic descriptors. 10) ATM VC management is not a part of this Recommendation. (See i in Appendix V and 9 in clause 2/G. 9 8 3.2 .) Configur
36、ation of the VP Network CTPs and ATM Cross-Connections. Configuration of interworking VCC terrnination points (non-ATM UNIS only). Configuration of the OAM flows. Configuration of the physical ports. Configuration of T-CONT buffers and Traffic Schedulers. 5.2 Fault management See 5.2/G.983.2. 4 ITU-
37、T RN. G.983.7 (11/2001) 5.3 Performance management See 5.3lG.983.2. Managed Entity RequiredOptional Traffic Scheduler CR T-CONT Buffer CR 5.4 Security management See 5.4lG.983.2. Description Used when Traffic Scheduler is used. Used when one or more T-CONT buffers are supported. 6 See clause 6lG.983
38、.2. Protocol-independent MIB for the OMCI Managed Entity Required/Optional ANI CR 6.1 The managed entities in Table 1 shall be defined in addition to the managed entities defined in The managed entities in Table 2 shall change the requiredoptional level because of DBA function. Managed entities asso
39、ciated with DBA function ITU-T G.983.2. Description New attributes are necessary for DBA function. 6.2 Managed entities relation diagrams Figures 4 and 5 show the managed entity relation diagrams. Figure 4 shows an ONT with cardholders on both UNI and ANI sides. Figure 5 shows the ATM VP cross conne
40、ction function with T-CONT buffer. A new managed entity “T-CONT Buffer“ appears in both figures. ITU-T Rec. G.983.7 (11/2001) 5 I SW Image ONT Data subsmer Line Cardholder US Priority Cardholder Subscriber 1 DSPnority LineCard 11 PON PPTP ANI 11 11 PONTC 1 1 Adapter UNI - PPTP - TC Adapter T15445700
41、1 Figure 4/6.983.7 - Managed entity relation diagram for non-integrated interfaces L 1 10256 w UNI u- PPTP TCAdaptor PON PPTP ANI PON TC Adaptor T1544580-01 Figure 5/G.983.7 - Managed entity relation diagram, ATM service 6 ITU-T RW. G.983.7 (11/2001) 7 MIB description DBA function causes modificatio
42、n of managed entities and creation of new managed entities. In this clause, modified or new managed entities are described. Other managed entities are referred to ITU-T G.983.2. 7.1 ONT equipment management 7.1.1 ONTMON This managed entity represents the ONT as equipment. An instance of this managed
43、 entity is automatically created by the ONT after initialization. After the creation of this managed entity, the associated attributes are updated according to the data within the ONT itself. The total number of T-CONT buffers and total number of Traffic Schedulers in the ONT core are included in th
44、is managed entity as attributes. Relationships All other managed entities in this Recommendation and ITU-TG.983.2 are related directly or indirectly to the ONTMON entity. Attributes Managed Entity id: Vendor id: Version: Serial number: Traffic management option: This attribute provides a unique numb
45、er for each instance of this managed entity. There is only one instance and it has the number 0x0000. (R) (mandatory) (2 bytes). This attribute identifies the vendor of the ONT. Upon autonomous instantiation, this attribute consists of all spaces. (R) (mandatory) (4 bytes). This attribute identifies
46、 the version of the ONT as defined by the vendor. The printable value of “O“ shall be used when version information is not available or applicable to the ONT being represented. Upon autonomous instantiation, this attribute consists of all spaces. (R) (mandatory) (14 bytes). The serial number is uniq
47、ue for each ONT. Note that the serial number of ONT is already defined in ITU-T G.983.1 and contains the vendor id and/or the version number. Upon autonomous instantiation this attribute consists of all spaces. (R) (mandatory) (8 bytes). This attribute identifies the upstream traffic management func
48、tion implemented in the ONT. There are two options: 1) Triority controlled or scheduled upstream traffic“ (0x00): the upstream traffic coming -om the user is given a priority. Otherwise the minimum upstream traffic of each T-CONT Scheduler is guaranteed. “Cell rate controlled upstream traffic“ (0x01
49、): the maximum upstream traffic of each individual connection is guaranteed. For more clarification see Appendix IV G.983.2. Note that the Traffic management option will not apply to downstream traffic. In other words, there is no need for a traffic descriptor for the downstream direction and downstream priority queues can be used. Upon autonomous instantiation, this attribute is set to 0x00. (R) (mandatory) 2) (1 byte). ITU-T Rec. 6.983.7 (11/2001) 7 VP cross-connection function option: This attribute identifies the support of ATM VP Cross-Connection man
