Contact: Heejin Choi
Email: hjchoi2@etri.re.kr
Phone: +82. 42. 860. 4946
OEO-Based TDMA-PON
Reach Extender(RE) Access
Network Technology
For efficient high subscriber density and long-distance transmission
2
TECHNOLOGY BRIEF
▣ Technology Overview
OEO-based PON Reach Extender Technology
By applying the Reach Extender(RE) technology to the PON link without any
change of the legacy PON equipment, the following was available for the
technology: expansion of the transmission distance between OLT and ONU from
20km to 100km, accommodation up to 128 customers per PON port, expansion of
more than 8 times the original link capacity per PON link through the WDM
technique.
Reach Extender, PON Extender, TDMA-PON, Long-reach PON etc.
□ Keywords
□ TRL
•
Composed of COT and RT
Technology Classification Code
Sector
Sub Sector
Industry
Network
System
Access Network
6
3
TECHNOLOGY BRIEF
OEO-based PON Reach Extender Technology
▶ PON elemental technology that can expand
the link capacity per optical fiber by applying
the WDM technology at the Feeder section,
and that can expand the link budget of 59dB
through a signal retiming at remote site
▶ Specific Technologies
• By the increased link budget, the technology
provides at most 100km distance and up to 128
customers
• Optical fiber reduction technology that converts the
several PON signals to WDM signals through
multiplexing of WDM
• Cost-insensitive FTTH services that expand the
coverage area from near-end urban users to far-end
rural customers
• PON COT Platform: Installed together with legacy OLT equipment at central
office, PON signals are transmitted and received to single feeder fiber through a
WDM wavelength converting
• PON RT Platform: Installed at remote nodes, legacy ODN is accommodated by
converting the WDM signal back to PON signal, and supports a long-distance
transmission through a burst-mode signal detection and restoration
▶ FTTH Service
• Broadening telecom service: cost reduction of the access network by the
integration of the original telecom companies
• Optical fiber reduction service: fiber cost reduction due to multiplexing of
many PON signals in single optical fiber
• Long-reach FTTH service: provides the same optical wide range service for the
minority users without new instal ations
▣ Technology Description
▣ Application Fields
4
▶ Features and pros
• Compatible with the original PON OLT/ONU equipment and applicable easily in
the access network
• PON Reach Extender line card is applicable for 1G-EPON, 2.5G-GPON, 10G-EPON
through the same platform
• Based on the long-distance transmission technique, a telecom company can
manage and conserve metro and access equipment
▶ Superiority over other technology
• Alternative technology
• SOA-based PON Reach Extender technology
• High-power PMD technology
• Superior features
• 1/8 the price of the SOA technology(Burst mode SOA development request)
• Additional Gain provided, more than 5dB
• WDM technology applied to PON link
• 10Gbps PON technology applicable
• Can be applied to all original WDM technology and low-cost PON
OLT/ONU optical transceiver
• Can provide functions that process and retime the burst-mode signal
through low-cost FPGA
▣ Outstanding Features
▣ IPR Status
No.
Country
Application
Number (date)
Status
Title
1
US
9077477(2015.07.07) Registered
Continuous-mode wavelength conversion
apparatus, burst-mode wavelength
conversion apparatus, remote
termination apparatus, and central office
termination apparatus
2
US
8548329(2013.10.01) Registered
Apparatus and method for relaying in
Gigabit Passive Optical Network
Items
SOA-based RE
High-power PMD
OEO-based RE
Layer
L0
L0
L1
Upstream Mode
Burst
Burst
Burst or Continuous
Link Budget
54 dB
33 dB
59 dB
Splitting ratio@reach
(Under worst-case ODN)
1:64@50km
1:64@40km
1:128@100km
Remote Management
No
No
Yes (SNMP)
WDM
Bursty WDM
Bursty WDM
Continuous WDM
5
• Netvision Telecom commercialized
the 1st gen PON Reach Extender
through the
transfer
of
ETRI
technology
• In 2012, CJHV put EPON Reach
Extender into test service
• Dongwon T&I is commercializing
CWDM base EPON Reach Extender
using ETRI technology to upgrade
the KT access network
• Compatibility test for ubiquitous
10G-EPON OLT/ONU used in ETRI’s
2nd gen PON Reach Extender was
completed
• KT is trying to graft the WDM
technology onto the 1st gen PON
service network to enhance their
access network
• In North America, 1st gen PON
Extender is commercialized mainly
with Go!Foton and Commscope
• China is mainly releasing mini RT
products for the 1st gen PON
• Emerging countries such as Brazil
and Russia, are highly interested in
applying the PON Extender and
prefers the set up of WDM base
PON link in FTTH infrastructure
• Great Britain’s British Telecom is
processing the LR-PON project to
cover a wide area for the telecom
company
• North America’s cable TV businesses
request services with transmission
distance of 100km
• Communications businesses request more money for the decrease in
efficient cost in improving the access network
• Normally Reach Extenders for 1st generation PON (EPON, GPON) are
developed, WDM cannot be accommodated
□ Korea
□ Global
▣ Technology Trend
6
기술수요
적용처
Application
Industry
• KT is considering the application of 8 channel CWDM-based PON Reach Extender
for the improvement of 1st gen PON market’s network and through the application,
the demand for the 1st gen PON Reach Extender is expected to increase
• Globally, depending on the customer’s bandwidth demands, 2nd gen PON
technology started to be applied and the demand for 2nd gen PON Reach Extender
wil increase as wel
• PON-based FTTH Service
• PON Equipment Vendors
• FTTH Service Network
▶ Global Vendors
• Go!Foton
• Commscope
• Alphion
• In 2012, the global PON market was at a level of about 4.5 billion dollars,
and long-distance transmission issue was brought up for the structural
improvement of recent 1st gen PON access network
• In 2017, the market is predicted to be about 4.3 billion dollars, and the
10G-EPON market is predicted to grow up to 950 million dollars
▶ Korean Vendors
• Netvision Telecom
• Dongwon T&I
▣ M arket Trend
□ Market Leaders
□ Technology Demand
▶ Global PON Market (2012-2017, Unit: 100 million dollar)
7
•
4-channel PON COT circuit technology (PCS schematic, Gerber data)
•
9-channel WDM MUX/DEMUX technology
•
Transceiver monitoring technology
•
Relevant Technology Documents
•
Test and measurement method technology
§
PON COT Platform
•
2-channel PON RT circuit technology (PCS schematic, Gerber data)
•
FPGA design technology and source code for the signal retiming at an upstream
and downstream
•
Transceiver monitoring technology
•
Remote control technology (SNMP)
•
Relevant Technology Documents
§
PON RT Technology
▶ Applications
• 19 inch multi-channel support platform product
•Optical core reduction service network applied through the accommodation
of 4 channel, 8 channel WDM
• Standalone mini devices
•Applied to outdoor networks that can support long distance transmission
without WDM accommodation
▶ Effects
• Access network’s structure improvement
•A flexible network is possible through long-distance transmission and WDM
linkage, management and operating expenses can be highly enhanced through
equipment centralization
•Equal service for the long-distanced minorities
•10G PON effective operation possible, Giga Internet service provided
▣ Applications and Effects
▣ Scope of Technology Transfer
§
PON link’s optical fiber decrease/long-distance transmission, circuit
blueprints for the 1st gen PON Reach Extender, PCB Gerber data, test
procedure and result documents, ordinary license for the patent
