ITU-T Recommendation G.984.4
Gigabit-capable Passive Optical
Networks ( G-PON ) : ONT
management and control interface
specification
Reference models and terms
„
6.1 OMCI in ITU-T Rec. G.984.2
… The
architecture reference model is in ITU-T Rec.
G.984.2 .
… While this document provides some minimal
modelling for ONUs with service interfaces ,detailed
OMCI support for ONUs with 802.11 and xDSL
interface is in ITU-T Recs G.983.9 and G.983.10 .
… ( OMCI = ONT management and control interface )
Reference models and terms
„
6.2 ONT/ONU functions
Reference models and terms
… access
network line termination function (AN-
LT)
… user network interface line termination
function (UNI-LT)
… service
multiplexing and de-multiplexing
function (Service MUX and DEMUX).
Reference models and terms
„
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 crossconnection.
Reference models and terms
„
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 .
… (GEM = G-PON encapsulation method)
Reference models and terms
„
6.5 Support of Multicast connection
… 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.
… (T-CONT = Transmission Container)
Requirements of the management
interface specifications
„
The OMCI is used by the OLT to control an
ONT. This protocol allows the OLT to:
… establish
and release connections across the ONT
… manage the UNIs at the ONT
… request configuration information and performance
statistics
… autonomously inform the system operator of events
such as link failures
Requirements of the management
interface specifications
„
„
The OMCI protocol is asymmetric: the controller in the
OLT is the master and the one in the ONT is the slave.
The OMCI requirements given in this Recommendation
are needed to manage the ONT in the following areas:
… configuration management
… fault management
… performance management
… security management
Requirements of the management
interface specifications
„
7.1 Configuration management
… It
involves the following:
„
Configuration of equipment
„ Configuration of the UNIs
„ Configuration of the VP Network CTP-Gs, ATM VP
Cross-Connections, and GEM Port Network CTPs
„ Configuration of Interworking Termination Points
„ Configuration of the OAM flows
Requirements of the management
interface specifications
„
Configuration of the physical ports
„ Configuration of AAL profiles
„ Configuration of service profiles
„ Configuration of traffic descriptors
„ Configuration of GAL profiles
„ ( CTP = Connection Termination Point )
„ ( AAL = ATM Adaptation Layer )
„ ( GAL = GEM Adaptation Layer )
Requirements of the management
interface specifications
„
For ONT that supports ATM mode
ONT
UNI
(not ATM)
OLT
ANI
(G-PON)
VC
VP
VP-XC
VP
ANI
(G-PON)
NNI
VC
VC-XC
VC
VP
VP-XC
VP
Requirements of the management
interface specifications
„
For cases as the supports of ONUs with xDSL interface
Requirements of the management
interface specifications
„
7.2 Fault management
…
The ONT supports limited fault management
only.
„
„
„
„
„
ONT-G;
Subscriber Line Cardholder;
Subscriber Line Card;
PON IF Line Card-G;
Physical Path Termination Point ATM UNI;
Requirements of the management
interface specifications
„
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Physical Path Termination Point Ethernet UNI;
Physical Path Termination Point CES UNI;
Physical Path Termination Point ISDN UNI;
Physical Path Termination Point POTS UNI;
Physical Path Termination Point Video UNI;
Physical Path Termination Point Video ANI;
Physical Path Termination Point ADSL UNI;
Physical Path Termination Point VDSL UNI;
Requirements of the management
interface specifications
„
TC AdapterB-PON;
„ ATM Interworking VCC Termination Point;
„ GEM Interworking Termination Point;
„ VP Network CTP-G;
„ VC Network CTP-G;
„ GEM Port Network CTP;
„ ONU-G.
Requirements of the management
interface specifications
„
7.3 Performance management
… The
ONT has only limited performance
monitoring.
„
UPC Disagreement Monitoring History DataBPON;
„ AAL1 Protocol Monitoring History DataB-PON;
„ AAL5 Protocol Monitoring History DataB-PON;
„ Ethernet Performance Monitoring History Data;
„ Ethernet Performance Monitoring History Data 2;
Requirements of the management
interface specifications
„
CES Physical Interface Monitoring History Data;
„ TC Adapter Protocol Monitoring History Data;
„ AAL 2 CPS Protocol Monitoring History Data BPON;
„ AAL 2 SSCS Protocol Monitoring History Data BPON;
„ Priority Queue-G;
„ MAC Bridge PM History Data;
„ MAC Bridge Port PM History Data;
Requirements of the management
interface specifications
„
Voice PM History Data;
„ VP PM History Data;
„ VC PM History Data;
„ ICMP PM History Data1;
„ ICMP PM History Data2
„ IP Router PM History Data1;
„ IP Router PM History Data2;
„ 802.11 Counters;
Requirements of the management
interface specifications
„
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GEM Port Protocol Monitoring History Data;
GAL TDM Protocol Monitoring History Data;
GAL Ethernet Protocol Monitoring History Data;
ADSL ATU-C Performance Monitoring History Data;
ADSL ATU-R Performance Monitoring History Data;
ADSL ATU-C Channel Performance Monitoring History Data;
ADSL ATU-R Channel Performance Monitoring History Data;
TC Adaptor Performance Monitoring History Data ADSL;
VDSL VTU-O Physical Interface Monitoring History Data;
Requirements of the management
interface specifications
„
„
VDSL VTU-R Physical Interface Monitoring History Data;
VDSL VTU-O Channel Performance Monitoring History Data;
VDSL VTU-R Channel Performance Monitoring History Data.
„
( GAL = GEM Adaptation Layer )
„
( CPS = Common Part Sublayer )
( PM = Protocol Monitoring )
( ATU-C = ADSL Transceiver Unit, Central office end )
( ATU-R = ADSL Transceiver Unit, Remote Terminal End )
„
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( VDSL = Very High Speed Digital Subscriber Line )
( VTU-O = VDSL Transceiver Unit, ONU end )
( VTU-R = VDSL Transceiver Unit, Remote Terminal end )
Requirements of the management
interface specifications
„
7.4 Security management
…
The protection configuration that is defined in
ITU-T Rec. G.983.5 is considered in this
Recommendation.
… Though ITU-T Rec. G.983.6 specifies the
OMCI for B-PON protection, a new scheme
for G-PON protection is needed because GPON has a different protocol stack from
B‑PON.
Protocol-independent MIB for
the OMCI
„
This Recommendation defines a protocol
necessary to support capabilities identified
by ITU-T Recs G.984.2 and G.984.3.
„ A protocol-independent MIB is used to
describe the exchange of information
across the OMCI.
Protocol-independent MIB for
the OMCI
„
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.
… 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)
Conditional Requirements (CR)
Option (O)
Figure 5 is a managed entity relation diagram from the
viewpoint of ONT configuration.
Figure 6 is a managed entity relation diagram from the viewpoint of user traffic.
Figure 7 shows the Managed entity relation diagram in the case of MAC bridged LAN.
Figure 8 shows the managed entity relation diagram in the case of structured CES
( circuit emulation service ).
Figure 9 shows a part of ME relation diagram in that an ONT supports 1+1 protection
function.
Figure 10 shows a part of ME relation diagram in that an ONT supports 1:1
protection function.