ITU-T
The leader on G-PON
standards
International Telecommunication Union
means
G.984.1, Gigabit-capable Passive Optical Networks
(G-PON): General characteristics
This Recommendation provides examples of services,
User Network Interfaces (UNI) and Service Node Interfaces (SNI) that are required by network operators. In
addition, it shows the principal deployment configuration.
Wherever possible, this Recommendation maintains
characteristics from the ITU-T G.982 and G.983.x series
Recommendations in order to promote backward compatibility with existing Optical Distribution Networks (ODN)
that comply with these Recommendations.
•
Full Service Support – including voice, TDM, Ethernet
(10/100 BaseT), ATM, leased lines, wireless extension
and more.
•
Physical reach of at least 20 km with a logical reach
support within the protocol of 60 km.
•
Support for various bitrate options using the same
protocol, including symmetrical 622 Mbit/s,
symmetrical 1.25 Gbit/s, 2.5 Gbit/s downstream
and 1.25 Gbit/s upstream and more.
G.984.2, Gigabit-capable Passive Optical Networks
(G-PON): Physical Media Dependent (PMD) layer
specification
This Recommendation specifies the physical layer requirements and specifications for the Physical Media Dependent (PMD) layer. It covers systems with nominal line rates
of 1244.160 Mbit/s and 2488.320 Mbit/s in the downstream direction and 155.520 Mbit/s, 622.080 Mbit/s,
1244.160 Mbit/s and 2488.320 Mbit/s in the upstream
direction. Both symmetrical and asymmetrical
(upstream / downstream) Gigabit-capable Passive Optical
Network (G-PON) systems are described.
•
Strong Operation, Administration, Maintenance and
Provisioning (OAM&P) capabilities offering end-to-end
service management.
•
Security at the protocol level for downstream traffic
due to the multicast nature of PON.
Worldwide Passive Optical
Networks
Equipment Revenue Forecast
1 000
750
500
250
0
2001
2002
2003
2004
2005
2006
Source: In-Stat/MDR 3/02
10.2003
For more information on ongoing G-PON Recommendation activities, please check the ITU-T Study Group 15
website at: www.itu.int/ITU-T/com15
TSBpromo@itu.int
USD millions
G.984.3, Gigabit-capable Passive Optical Networks
(G-PON): Transmission Convergence Layer
Specification
This Recommendation specifies the frame format,
media access control method, ranging method,
OAM functionality and security in G-PON networks.
Gigabit-capable Passive Optical Network
GPON.indd 1
Your full service
fibre optic
access network
transport
solution
11.12.2003, 14:37:26
G-PON Access System
Voice
Downstream (two-fibre systems):
Downstream (single-fibre systems):
Upstream:
Data
1310 nm ± 50 nm
1490 nm ± 10 nm
1310 nm ± 50 nm
ONU
BN
Maximum bit rate 2 488 Gbit/s both downstream and upstream
Video
Access
Node
TDM
ONU
BN
PABX
NB
B
N
1:32 (64) Optical splitter
E1/T1
CC
OLT
B
N
BB
B
N
GbE
STMn/OCn
TDMA
Data
ONU
BN
0-20 km physical reach
(60 km logical reach
supported by protocol)
PABX
ONU
TDM
TDMA
OLT
CC
NB
BB
E1
T1
GbE
STMn
OCn
Private Automatic Branch Exchange
Optical Network Unit
Time Division Multiplex
Time Division Multiple Access
Optical Line Termination
Cross Connect
Narrow Band
Broadband
2 048 Mbit/s
1 554 Mbit/s
gigabit ethernet
Synchronous Transport Module “n”
Optical Carrier “n”
ITU-T Study Group 15 Question 2 is responsible for the development of Recommendations in the area of "Optical systems for access networks”.
See http://www.itu.int/ITU-T/studygroups/com15/sg15-q2.html for more details.
GPON.indd 2
11.12.2003, 14:37:28