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T-REC-G.984.4-200406-S!!PDF-E.txt
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----------------------- Page 1-----------------------
INTERNATIONAL TELECOMMUNICATION UNION
ITU-T G.984.4
TELECOMMUNICATION (06/2004)
STANDARDIZATION SECTOR
OF ITU
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 Optical Networks
(G-PON): ONT management and control
interface specification
ITU-T Recommendation G.984.4
----------------------- Page 2-----------------------
ITU-T G-SERIES RECOMMENDATIONS
TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS
INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100–G.199
GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER- G.200–G.299
TRANSMISSION SYSTEMS
INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE G.300–G.399
SYSTEMS ON METALLIC LINES
GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE G.400–G.449
SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH
METALLIC LINES
COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450–G.499
TESTING EQUIPMENTS G.500–G.599
TRANSMISSION MEDIA CHARACTERISTICS G.600–G.699
Characteristics of optical components and subsystems G.660–G.699
DIGITAL TERMINAL EQUIPMENTS G.700–G.799
DIGITAL NETWORKS G.800–G.899
DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900–G.999
General G.900–G.909
Parameters for optical fibre cable systems G.910–G.919
Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s G.920–G.929
Digital line transmission systems on cable at non-hierarchical bit rates G.930–G.939
Digital line systems provided by FDM transmission bearers G.940–G.949
Digital line systems G.950–G.959
Digital section and digital transmission systems for customer access to ISDN G.960–G.969
Optical fibre submarine cable systems G.970–G.979
Optical line systems for local and access networks G.980–G.989
Access networks G.990–G.999
QUALITY OF SERVICE AND PERFORMANCE – GENERIC AND USER-RELATED G.1000–G.1999
ASPECTS
TRANSMISSION MEDIA CHARACTERISTICS G.6000–G.6999
DIGITAL TERMINAL EQUIPMENTS G.7000–G.7999
DIGITAL NETWORKS G.8000–G.8999
For further details, please refer to the list of ITU-T Recommendations.
----------------------- Page 3-----------------------
ITU-T Recommendation G.984.4
Gigabit-capable Passive Optical Networks (G-PON):
ONT management and control interface specification
Summary
This Recommendation provides the Optical Network Termination (ONT) Management and Control
Interface (OMCI) specification for Gigabit-capable Passive Optical Network (G-PON) systems as
defined in ITU-T Recs G.984.2 and G.984.3.
Firstly, it specifies the managed entities of a protocol-independent Management Information Base
(MIB) that models the exchange of information between the Optical Line Termination (OLT) and
the Optical Network Termination (ONT). In addition, it covers the ONT management and control
channel, protocol and detailed messages.
Source
ITU-T Recommendation G.984.4 was approved on 13 June 2004 by ITU-T Study Group 15
(2001-2004) under the ITU-T Recommendation A.8 procedure.
ITU-T Rec. G.984.4 (06/2004) i
----------------------- Page 4-----------------------
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 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 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-T's 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 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" and 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
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 process.
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 urged to consult the
TSB patent database.
ITU 2004
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the
prior written permission of ITU.
ii ITU-T Rec. G.984.4 (06/2004)
----------------------- Page 5-----------------------
CONTENTS
Page
1 Scope ............................................................................................................................ 1
2 References..................................................................................................................... 1
3 Definitions .................................................................................................................... 2
3.1 ONT and ONU ............................................................................................... 2
3.2 Upstream and downstream ............................................................................. 2
4 Abbreviations................................................................................................................ 2
5 Conventions .................................................................................................................. 5
6 Reference model and terms .......................................................................................... 6
6.1 OMCI in ITU-T Rec. G.984.2........................................................................ 6
6.2 ONT/ONU functions ...................................................................................... 6
6.3 VP/VC Mux functionality in the ONT ........................................................... 7
6.4 Encapsulation in GEM frame ......................................................................... 7
6.5 Support of Multicast connection .................................................................... 7
7 Requirements of the management interface specification............................................ 7
7.1 Configuration management ............................................................................ 8
7.2 Fault management .......................................................................................... 9
7.3 Performance management .............................................................................. 10
7.4 Security management ..................................................................................... 11
8 Protocol-independent MIB for the OMCI .................................................................... 11
8.1 Managed entities............................................................................................. 11
8.2 Managed entity relation diagrams .................................................................. 18
9 MIB description............................................................................................................ 23
9.1 ONT equipment management......................................................................... 25
9.2 ANI management............................................................................................ 34
9.3 UNI Management ........................................................................................... 37
9.4 Connection Management................................................................................ 49
9.5 Traffic management........................................................................................ 56
10 ONT Management and Control Channel (OMCC) ...................................................... 60
11 ONT management and control protocol ....................................................................... 60
11.1 ONT management and control protocol cell/packet format ........................... 60
11.2 Message flow control and error recovery....................................................... 67
11.3 OMCI handling within the ONT .................................................................... 67
Appendix I – OMCI common mechanisms and services......................................................... 70
I.1 Common mechanisms .................................................................................... 70
I.2 Common services ........................................................................................... 70
ITU-T Rec. G.984.4 (06/2004) iii
----------------------- Page 6-----------------------
Page
Appendix II – OMCI message set............................................................................................ 76
II.1 General remarks.............................................................................................. 76
II.2 Message layout ............................................................................................... 79
BIBLIOGRAPHY.................................................................................................................... 105
iv ITU-T Rec. G.984.4 (06/2004)
----------------------- Page 7-----------------------
ITU-T Recommendation G.984.4
Gigabit-capable Passive Optical Networks (G-PON):
ONT management and control interface specification
1 Scope
This Recommendation specifies the ONT Management and Control Interface (OMCI) for the
G-PON system defined in ITU-T Recs G.984.2 and G.984.3 to enable multi-vendor interoperability
between the OLT and the ONT.
The OMCI specification addresses the ONT configuration management, fault management and
performance management for G-PON system operation and for several services including:
• ATM adaptation layers 1, 2, and 5;
• GEM adaptation layers;
• circuit emulation service;
• Ethernet services, including MAC Bridged LAN;
• voice services;
• wavelength division multiplexing.
The focus of this OMCI specification is on FTTH and FTTBusiness ONTs; however, support for
ONUs is addressed as well. This Recommendation defines a protocol necessary to support the
capabilities identified for these ONTs. It also allows optional components and future extensions.
This Recommendation reuses much of ITU-T Rec. G.983.2; where appropriate, the reader is
referred to the relevant sections of that Recommendation.
1
2 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. 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 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.
[1] ITU-T Recommendation I.363.5 (1996), B-ISDN ATM Adaptation Layer specification:
Type 5 AAL.
[2] ITU-T Recommendation I.751 (1996), Asynchronous transfer mode management of the
network element view.
[3] ITU-T Recommendation G.983.1 (1998), Broadband optical access systems based on
Passive Optical Networks (PON) .
[4] ITU-T Recommendation G.983.2 (2002), ONT management and control interface
specification for B-PON, plus Amendment 1.
[5] ITU-T Implementors' Guide to G.983.2 (2002).
____________________
1 References to Implementors' Guides in the text of this Recommendation do not give them the status of
Recommendations.
ITU-T Rec. G.984.4 (06/2004) 1
----------------------- Page 8-----------------------
[6] ITU-T Recommendation G.983.5 (2002), A broadband optical access system with
enhanced survivability.
[7] ITU-T Recommendation G.983.6 (2002), ONT management and control interface
specifications for B-PON system with protection features.
[8] ITU-T Recommendation G.983.7 (2001), ONT management and control interface
specification for Dynamic Bandwidth Assignment (DBA) B-PON system.
[9] ITU-T Recommendation G.983.8 (2003), B-PON OMCI support for IP, ISDN, video, VLAN
tagging, VC cross-connections and other select functions.
[10] ITU-T Recommendation G.984.2 (2003), Gigabit-capable Passive Optical Networks
(G-PON): Physical Media Dependent (PMD) layer specification.
[11] ITU-T Recommendation G.984.3 (2004), Gigabit-capable Passive Optical Networks
(G-PON): Transmission convergence layer specification.
[12] ITU-T Recommendation G.983.9 (2004), B-PON ONT Management and Control Interface
(OMCI) support for Wireless Local Area Network interfaces.
[13] ITU-T Recommendation G.983.10 (2004), B-PON ONT Management and Control
Interface (OMCI) support for Digital Subscriber Line interfaces.
3 Definitions
3.1 ONT and ONU
The terminology of ONT, which will be used throughout this Recommendation, is more broadly
defined as an ONU used for the FTTH and FTTBusiness configuration. In general, the differences
between FTTH and FTTBusiness are that FTTBusiness will serve more than one end user, have
stricter availability requirements, and be able to afford for more features and functions than FTTH.
When distinguishing ONT from ONU, the following definitions are used.
3.1.1 ONU: An Optical Network Unit provides (directly or remotely) the user-side interface of
the OAN and is connected to the ODN. Since services for more than one customer premise can flow
through the ONU, this device may be considered as part of the operator's network.
3.1.2 ONT: Optical Network Termination. This is an ONU which includes the user port function
and can be considered as part of the customer premises equipment.
3.2 Upstream and downstream
The upstream is a traffic flow from ONU to OLT and the downstream is a traffic flow from OLT to
ONU.
4 Abbreviations
This Recommendation uses the following abbreviations:
AAL ATM Adaptation Layer
ABR Available Bit Rate
ABT/DT ATM Block Transfer Delayed Transmission
ABT/IT ATM Block Transfer Immediate Transmission
ADSL Asymmetric Digital Subscriber Line
AES Advanced Encryption Standard
AIS Alarm Indication Signal
2 ITU-T Rec. G.984.4 (06/2004)
----------------------- Page 9-----------------------
AK Acknowledgement
AN Access Node
ANI Access Node Interface
AR Acknowledge Request
ATM Asynchronous Transfer Mode
ATU-C ADSL Transceiver Unit, Central office end
ATU-R ADSL Transceiver Unit, Remote Terminal End
AVC Attribute Value Change
B-BCC Broadband Bearer Connection Control
B-PON Broadband Passive Optical Network
CBR Constant Bit Rate
CES Circuit Emulation Service
CLEI Common Language Equipment Identification
CPCS-SDU Common Part Convergence Sublayer Service Data Unit
CPCS-UU Common Part Convergence Sublayer User-to-User Indication
CPI Common Part Indicator
CPS Common Part Sublayer
CRC Cyclic Redundancy Check
CTP Connection Termination Point
DB Destination Bit
DBA Dynamic Bandwidth Assignment
DBR Deterministic Bit Rate
DEMUX De-multiplexing
DSSS Direct-Sequence Spread Spectrum
EMF Electromagnetic Field
FEC Forward Error Correction
FHSS Frequency-Hopping Spread Spectrum
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
GAL GEM Adaptation Layer
GEM G-PON Encapsulation Method
GFR Guaranteed Frame Rate
G-PON Gigabit Passive Optical Network
GTC G-PON Transmission Convergence
ITU-T Rec. G.984.4 (06/2004) 3
----------------------- Page 10-----------------------
HN Home Network
HOL Head of the Line
ICMP Internet Control Message Protocol
ID Identifier
IF Interface
IP Internet Protocol
IR Infrared
ISDN Integrated Services Digital Network
IW Interworking
LAN Local Area Network
LCT Local Craft Terminal
LES Loop Emulation Service
LIM Line Interface Module
LMI Layer Management Indication
LMIG Layer Management Indication Generation
LMIR Layer Management Indication Receiving
LT Line Terminal
MAC Media Access Control
ME Managed Entity
MIB Management Information Base
MLT Mechanized Loop Testing
MT Message Type
MUX Multiplexing
NT Network Terminal
OAN Optical Access Network
ODN Optical Distribution Network
OLT Optical Line Terminal
OMCC ONT Management and Control Channel
OMCI ONT Management and Control Interface
ONT Optical Network Terminal
ONU Optical Network Unit
PHY Physical Interface
PLOAM Physical Layer Operations, Administration and Maintenance
PM Protocol Monitoring
PON Passive Optical Network
POTS Plain Old Telephone Service
PPTP Physical Path Termination Point
4 ITU-T Rec. G.984.4 (06/2004)
----------------------- Page 11-----------------------
PSD Power Spectral Density
PVC Permanent Virtual Channel
RDI Remote Defect Indication
RFI Radio Frequency Interference
SAR Segmentation and Reassembly
SBR Statistical Bit Rate
SN Service Node
SNI Service Node Interface
SSCS Service Specific Convergence Sublayer
TC Transmission Convergence
TCA Threshold Crossing Alert
T-CONT Transmission Container
TDM Time Division Multiplexing
TE Terminal Equipment
TP Termination Point
UBR Unspecified Bit Rate
UNI User Network Interface
UPC Usage Parameter Control
VBR Variable Bit Rate
VC Virtual Channel
VCC Virtual Channel Connection
VCI Virtual Channel Identifier
VDSL Very High Speed Digital Subscriber Line
VP Virtual Path
VPI Virtual Path Identifier
VTU-O VDSL Transceiver Unit, ONU end
VTU-R VDSL Transceiver Unit, Remote Terminal end
WRR Weighted Round Robin
xDSL x Digital Subscriber Line
5 Conventions
In all bit vectors indicated in this Recommendation, the rightmost bit is bit 1. This represents the
least significant bit, while bit 8 represents the most significant bit within a byte. If the bit vector is
made up of more than one byte, then the numbering starts from the least significant byte onwards.
In all attribute descriptions that refer to the Boolean values "true" and "false", true will be coded as
0x01 in hexadecimal and false will be coded as 0x00.
In all attribute descriptions that refer to spaces, the value 0x20 must be used for the entire size of the
attribute.
ITU-T Rec. G.984.4 (06/2004) 5
----------------------- Page 12-----------------------
6 Reference model and terms
6.1 OMCI in ITU-T Rec. G.984.2
The network architecture reference model for G-PON is described in ITU-T Rec. G.984.2 and
shown in Figure 1. The G-PON fits various access network architectures, i.e., FTTH, FTTB/C and
FTTCab.
The OMCI specification fits into the overall ITU-T Rec. G.984.2 model for an access network
system as illustrated in Figure 1. The dotted line shows a path for OMCI signals between an OLT
and ONT. While this Recommendation provides some minimal modelling for ONUs with service
interfaces, detailed OMCI support for ONUs with 802.11 and xDSL interfaces is described in
ITU-T Recs G.983.9 and G.983.10.
Figure 1/G.984.4 −− Reference model
−−
6.2 ONT/ONU functions
As shown in Figure 2, the functions of the ONT/ONU are:
a) access network line termination function (AN-LT);
b) user network interface line termination function (UNI-LT), noting that in the Fibre to the
Business case the UNIs from one ONU may belong to different users;
c) service multiplexing and de-multiplexing function (Service MUX and DEMUX).
6 ITU-T Rec. G.984.4 (06/2004)
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Figure 2/G.984.4 – ONT/ONU functional block diagram
6.3 VP/VC Mux functionality in the ONT
In ITU-T Rec. G.984.3, the end-to-end G-PON system (i.e., OLT, ODN and ONT) can function as
an ATM VP or VC cross-connection with both provisioned and on-demand connectivity. The
configuration of the ATM VP/VC cross-connection can be initiated by:
a) the network element operations system via the management interface (e.g., Q3);
b) the Service Node (SN) over a VB5.2 Broadband Bearer Connection Control (B-BCC)
protocol.
The ONT, however, always acts as a provisioned ATM multiplexer for ATM connections. The
OMCI itself does not distinguish between these two cases. The OLT can, however, assign different
priorities to OMCI messages such that in case b) a fast response time of the OMCI is achieved.
6.4 Encapsulation in GEM frame
As the GEM is embedded in the PON section, it is independent of the types of UNIs. The UNI
traffic is always encapsulated in GEM frames so that a cross-connect function is not needed in
GEM service.
6.5 Support of Multicast connection
Multicast traffic can be supported in G-PON network. While a Port-ID is assigned to a T-CONT in
a unicast connection, a Port-ID is shared by multiple T-CONTs in a multicast connection. The
multicast connection set-up process is the same as the unicast connection set-up process. It is the
responsibility of the OLT to manage the member of a multicast group and control the multicast
connection in ONUs. The scheme for providing the multicast service (e.g., to manage the multicast
group, maintain the security and so on) needs further study.
In the downstream, the multicast connection that is supported by a shared Port-ID is useful. On the
other hand, in upstream, it is impossible to support the multicast connection by this methodology
because the OLT cannot reassemble segmented GEM packets correctly when it receives several
GEM packets with same Port-ID from different ONTs. Therefore, multicast Port-ID must be used
when an OLT sends multicast traffic to ONTs. The direction of multicast Port-ID is indicated
during multicast connection set-up.
7 Requirements of the management interface specification
The OMCI is used by the OLT to control an ONT. This protocol allows the OLT to:
a) establish and release connections across the ONT;
b) manage the UNIs at the ONT;
ITU-T Rec. G.984.4 (06/2004) 7
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c) request configuration information and performance statistics;
d) autonomously inform the system operator of events such as link failures.
The OMCI protocol runs across either an ATM or GEM connection between the OLT controller
and the ONT controller that is established at ONT initialization. The OMCI protocol is asymmetric:
the controller in the OLT is the master and the one in the ONT is the slave. A single OLT controller
using multiple instances of the protocol over separate control channels may control multiple ONTs.
The ONT management and control interface requirements given in this Recommendation are
needed to manage the ONT in the following areas:
a) configuration management;
b) fault management;
c) performance management;
d) security management.
7.1 Configuration management
Configuration management provides functions to exercise control over, identify, collect data from
and provide data to the ONT. This involves the following:
a) Configuration of equipment;
b) Configuration of the UNIs;
c) Configuration of the VP Network CTP-Gs, ATM VP Cross-Connections, and GEM Port
Network CTPs;
d) Configuration of Interworking Termination Points;
e) Configuration of the OAM flows;
f) Configuration of the physical ports;
g) Configuration of AAL profiles;
h) Configuration of service profiles;
i) Configuration of traffic descriptors;
j) Configuration of GAL profiles.
For an ONT that supports ATM mode, the ONT handles ATM VP cross-connection in order to free
VPI values on the UNI (the VPI value on the ANI is not free because the VPI values on the ANI are
shared with all ONUs in the PON. VP cross-connection on the ONT resolves this limitation for the
UNI). In the case of the OMCI, VC termination and interworking VCCTP are unified to the
ATM Interworking VCC Termination Point ME. Figure 3 shows the termination model. For
non-ATM LIMs, the aggregate of traffic parameters for the various VC terminations is represented
by the Traffic Descriptor Profile Pointer associated with the VP Network CTP-G ME that contains
the VC terminations.
8 ITU-T Rec. G.984.4 (06/2004)
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Figure 3/G.984.4 −− ATM VP cross-connection termination model
−−
For cases such as the support of ONUs with xDSL interfaces, it is necessary to implement VC
cross-connections. VC cross-connection can be supported by the ONT/ONU, as indicated by the
termination model shown in Figure 4.
Figure 4/G.984.4 – ATM VC cross-connection termination model
7.2 Fault management
The ONT supports limited fault management only. Most of the operations are limited to failure
indication. The OMCI supports failure reporting on the following managed entities that are
described throughout clause 9, ITU-T Recs G.983.2 and G.983.8:
a) ONT-G;
b) Subscriber Line Cardholder;
c) Subscriber Line Card;
d) PON IF Line Card-G;
e) Physical Path Termination Point ATM UNI;
f) Physical Path Termination Point Ethernet UNI;
g) Physical Path Termination Point CES UNI;
h) Physical Path Termination Point ISDN UNI;
i) Physical Path Termination Point POTS UNI;
j) Physical Path Termination Point Video UNI;
ITU-T Rec. G.984.4 (06/2004) 9
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k) Physical Path Termination Point Video ANI;
l) Physical Path Termination Point ADSL UNI;
m) Physical Path Termination Point VDSL UNI;
n) TC AdapterB-PON;
o) ATM Interworking VCC Termination Point;
p) GEM Interworking Termination Point;
q) VP Network CTP-G;
r) VC Network CTP-G;
s) GEM Port Network CTP;
t) ONU-G.
An alarm table is defined for each of these entities.
The ONT also supports selective OAM cell loop-back testing at the UNI. The ONT diagnostics are
limited to the ONT self test. The OLT or element manager will process the information from the
ONT; for example, the OLT will determine the severity of each alarm when reporting it to the
network operator. ATM management of continuity monitoring is not a part of this Recommendation
(see af-nm-0020.001 (Bibliography) and ITU-T Rec. I.751).
7.3 Performance management
The ONT has only limited performance monitoring. The following are related managed entities:
a) UPC Disagreement Monitoring History DataB-PON;
b) AAL1 Protocol Monitoring History DataB-PON;
c) AAL5 Protocol Monitoring History DataB-PON;
d) Ethernet Performance Monitoring History Data;
e) Ethernet Performance Monitoring History Data 2;
f) CES Physical Interface Monitoring History Data;
g) TC Adapter Protocol Monitoring History Data;
h) AAL 2 CPS Protocol Monitoring History Data B-PON ;
i) AAL 2 SSCS Protocol Monitoring History Data B-PON ;
j) Priority Queue-G;
k) MAC Bridge PM History Data;
l) MAC Bridge Port PM History Data;
m) Voice PM History Data;
n) VP PM History Data;
o) VC PM History Data;
p) ICMP PM History Data1;
q) ICMP PM History Data2
r) IP Router PM History Data1;
s) IP Router PM History Data2;
t) 802.11 Counters;
u) GEM Port Protocol Monitoring History Data;
v) GAL TDM Protocol Monitoring History Data;
10 ITU-T Rec. G.984.4 (06/2004)
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w) GAL Ethernet Protocol Monitoring History Data;
x) ADSL ATU-C Performance Monitoring History Data;
y) ADSL ATU-R Performance Monitoring History Data;
z) ADSL ATU-C Channel Performance Monitoring History Data;
aa) ADSL ATU-R Channel Performance Monitoring History Data;
bb) TC Adaptor Performance Monitoring History Data ADSL;
cc) VDSL VTU-O Physical Interface Monitoring History Data;
dd) VDSL VTU-R Physical Interface Monitoring History Data;
ee) VDSL VTU-O Channel Performance Monitoring History Data;
ff) VDSL VTU-R Channel Performance Monitoring History Data.
Note that it is not required to upload all the performance monitoring related managed entities during
the MIB upload (see 7.1.2/G.983.2).
All the history data shall be maintained in the OLT. ATM management of performance monitoring
is not a part of this Recommendation (see af-nm-0020.001 and ITU-T Rec. I.751).
7.4 Security management
ITU-T Rec. G.984.3 specifies some mechanisms from the viewpoint of security. That includes the
downstream data encryption and password protection of ONT. The ONT2-G managed entity can
enable/disable the downstream encryption function.
This Recommendation supports the protection function. The type C protection configuration that is
defined in ITU-T Rec. G.983.5 is considered in this Recommendation. As the switching behaviour
for PON protection will be done in TC layer, this Recommendation defines a managed entity to
specify the protection capability. Though ITU-T Rec. G.983.6 specifies the OMCI for B-PON
protection, a new scheme for G-PON protection is needed because G-PON has a different protocol
stack from B-PON.
8 Protocol-independent MIB for the OMCI
The OMCI should be defined to allow vendors to offer modular, incremental capabilities to meet
different levels of customer needs. This Recommendation first targets FTTH and FTTBusiness
ONTs. It defines a protocol necessary to support capabilities identified by ITU-T Recs G.984.2 and
G.984.3. It is important for early deployment and interoperability, yet it allows for optional
components and future extensions.
A protocol-independent MIB is used to describe the exchange of information across the OMCI and
forms the basis from which protocol-specific models (e.g., Simple Device Protocol for the ONT)
are defined. This MIB has as much commonality as possible with the related generic MIB as
defined in other ITU-T Recommendations. It is intended to make the OMCI relatively simple while
maintaining consistency with the MIB used by the interface between the network-element manager
and the OLT.
8.1 Managed entities
The protocol-independent MIB presented in this Recommendation has been defined in terms of
managed entities. The managed entities are abstract representations of resources and services in an
ONT.
ITU-T Rec. G.984.4 (06/2004) 11
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This Recommendation uses three levels for indicating the degree of compliance necessary for
specific functions and managed entities associated with the OMCI specification:
• Requirement (R): Entities necessary for operational compatibility;
• Conditional Requirements (CR): Entities necessary when the specified optional function
is implemented;
• Option (O): Entities that may be useful and required by an operator but that are not
necessary for operational compatibility.
The possible managed entities are listed in Table 1. This table also shows the Recommendations
that define each ME.
In this table, G.983.2amd1 means ITU-T Rec. G.983.2 Amendment 1 and IGtoG.983.2 means
Implementors' Guide to G.983.2.
Table 1/G.984.4 −− Managed entities in the OMCI
−−
Required/ Recommen-
Managed entity Description
Optional dation
AAL 1 ProfileB-PON CR Used when the ONT supports CES UNIs G.983.2
AAL 1 Protocol Monitoring O Used when AAL1 layer performance G.983.2,
History DataB-PON monitoring is supported G.983.2amd1,
IGtoG.983.2
AAL 2 ProfileB-PON CR Used when the ONT supports AAL 2 G.983.2
AAL 2 CPS Protocol O Used when AAL 2 layer performance G.983.2,
Monitoring History DataB-PON monitoring is supported G.983.2amd1,
IGtoG.983.2
AAL 2 PVC ProfileB-PON CR Used when the ONT supports AAL 2 PVC G.983.2
AAL 2 SSCS Parameter CR Used when the ONT supports AAL 2 SSCS G.983.2
Profile 1
AAL 2 SSCS Parameter CR Used when the ONT supports AAL 2 SSCS G.983.2
Profile 2
AAL 2 SSCS Protocol CR Used when AAL 2 layer performance G.983.2,
Monitoring History DataB-PON monitoring is supported G.983.2amd1,
IGtoG.983.2
AAL 5 ProfileB-PON CR Used when the ONT supports LAN UNIs G.983.2
AAL 5 Protocol Monitoring O Used when AAL 5 layer performance G.983.2,
History DataB-PON monitoring is supported G.983.2amd1,
IGtoG.983.2
ADSL ATU-C Channel O Performance monitoring data for an ADSL G.983.10
Performance Monitoring ATU-C channel
History Data
ADSL ATU-C Performance O Performance monitoring data for an ADSL G.983.10
Monitoring History Data ATU-C modem Path
ADSL ATU-R Channel O Performance monitoring data for an ADSL G.983.10
Performance Monitoring ATU-R Channel
History Data
ADSL ATU-R Performance O Performance monitoring data for an ADSL G.983.10
Monitoring History Data ATU-R modem path
12 ITU-T Rec. G.984.4 (06/2004)
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