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ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006
International Telecommunication UnionITU-T
Technologies and applications Technologies and applications of Passive Optical Networks of Passive Optical Networks
(PON)(PON)
Yukio NakanoHitachi
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 2
ITU-T
FTTH Penetration in Japan
B-PON introduction Sept. 2002
June
1M
2M
3M
4M
5MN
umbe
r of
FTT
H u
sers
Dec June Dec June Dec June Dec0
Source: Ministry of Internal Affairs and Communication, Japan
2002 2003 2004 2005
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 3
ITU-T
CO
ONU
CoreNetwork
1310nm
1490nm
Optical splitter (passive)
Bi-directional transmissionover one fiber using WDM
PON Technologies
OLTONU
ONU
Upstream packet multiplexing on fiber without collision
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 4
ITU-T
PON Advantages
o Very high speed data up to 1 Gbit/s to home and businesses
o Maintenance cost reduction due to no electronics between CO and customers
o Low cost due to fiber and CO interface shared by several customers
o Constant data rate regardless of reach
o Multiple applications including data (IP), video and voice (triple play)
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 5
ITU-T
Broadband Internet application
o FTTH in Japan started from simple application of IP/Ethernet and it is still dominant
o Simple indoor ONU enabling economical Broadband access of 100 Mbit/s best effort service
o The service is like simple extension of ADSL
ONU OLT
CO
InternetInternetInternet
Home
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 6
ITU-T
Downstream Data + RF video
Central Office
Upstream Data
OLTONT
Home or Business
Voice
RF video
Data
Voice Network
Voice Voice NetworkNetwork
RF Video
RF RF VideoVideo
Data Network
Data Data NetworkNetwork
Triple play with RF video
o RF overlay using WDM provides conventional CATV type video service in addition to Broadband Internet
o Very popular in North America
WD
M
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 7
ITU-T
IP triple play application
o Home Gateways to separate IP video and provide POTS conversion
o Entire network based on IP and Ethernet
ONU
OLT
CO
Home Gateway
Voice Network
Voice Voice NetworkNetwork
Video NetworkVideo Video
NetworkNetwork
Data Network
Data Data NetworkNetwork
Home
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 8
ITU-T
G-PONGE-PONB-PON
Ethernet + TDM +ATMEthernetATMTransmission
Format
1.2 Gbit/s 1 Gbit/s150 Mbit/sUpstreamdata rate
2.4 Gbit/s1 Gbit/s600 Mbit/sDownstreamdata rate
ITU-T G.984IEEE 802.3ahITU-T G.983Standard
(Note) Rates of common practice.
PON Comparison
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 9
ITU-T
Why GPON now?
o Standardized by telecom operators and telecom vendors in ITU-T
o Various operation and management capability inherited from conventional proved telecom technologies
o Future-proof bandwidth
• 2.4 G / 64 users = 35 M per user
• 35 M = 6 M (HDTV-MPEG4) x 4 ch + 10 M (Internet)
o Suitable for business users because of various QoS and bandwidth management
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 10
ITU-T
GPON example
InternetInternetInternet
ONU (Single Family Unit)
OLT
ONU (Multi Dwelling/Tenant Unit)
2.4 G
1.2 G
20 km
10G/1G
1G
100M
100M
IPTV systems
IPTV IPTV systemssystems
VoIP systems
VoIP VoIP systemssystems
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 11
ITU-T
Possible Future Directions
o Technology available and massive GPON
deployment soon
o IP HDTV service in near future
o More bandwidth by higher transmission
rate or WDM technology
o Longer reach by optical amplifier
o Higher splitter ratio (more users per
PON) by optical amplifier
ITU-T Workshop “NGN and its Transport Networks“Kobe, 20-21 April 2006 12
ITU-T
Conclusion
o B-PON initiated the first massive PON
rollout in Japan
o PON technology is suitable for triple play
services (voice, video, data)
o Future-proof G-PON technology available
and soon to be deployed massively