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May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.1
KOREN/APAN-KR 2002Next Generation Internet Workshop
Submarine Cable System - Focusing on the Link between China & Korea -
Noriyuki Takeda and Junji Matsuda KDDI Submarine Cable Systems Inc. (KDDI-SCS)
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.2
KOREN/APAN-KR 2002Next Generation Internet Workshop
Submarine Cable Systems between Korea and China
CKC
APCN2
C2C
KJCN
Beijing
Seoul
Pusan
Taean
Qingdao
Chongming
0.56Gbit/s x 1WDM x 2FP
10Gbit/s x 64WDM x 4FP
10Gbit/s x 96WDM x 8FP
10Gbit/s x 24WDM x 12FP
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.3
KOREN/APAN-KR 2002Next Generation Internet Workshop
Outline
1. Introduction2. Configuration of Submarine Cable System3. Transmission Technologies - Experimental Results4. How to realize the cable system between Korea and China ? - Network configuration - Cost5. Conclusion
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.4
KOREN/APAN-KR 2002Next Generation Internet Workshop
Outline
1. Introduction2. Configuration of Submarine Cable System3. Transmission Technologies - Experimental Results4. How to realize the cable system between Korea and China ? - Network configuration - Cost5. Conclusion
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.5
KOREN/APAN-KR 2002Next Generation Internet Workshop
Repeaterless system and Repeater system
SLTE SLTECable
MC MC
SLTE
MC
PFE
MC
SLTE
Cable
Repeater
Repeaterless System
Repeater System
SLTE : Submarine Line Terminating EquipmentMC : Maintenance ControllerLME : Line Monitoring EquipmentPFE : Power Feeding Equipment
LME PFE LME
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.6
KOREN/APAN-KR 2002Next Generation Internet Workshop
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er
What is “WDM” ?
Wavelength DivisionMultiplexing
Optical Fiber
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er
Wavelength
Multiplexer Demultiplexer
Total capacity
10Gbit/s x n WDM
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.7
KOREN/APAN-KR 2002Next Generation Internet Workshop
Advantage of WDM : Upgrade
- Initial- After upgrade
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Repeater
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er
Upgrade : - Small initial investment - Increase the system capacity when you need without changing the wet plant
Cable capacity : 10Gbit/s x N
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.8
KOREN/APAN-KR 2002Next Generation Internet Workshop
What is Maximum Number of Wavelength?
System Length [km]
Max
imum
Num
ber
of
Wav
elen
gth
10Gbit/s per wavelength
0
50
100
150
200
100 200 300 400 500 600
RepeaterlessSystem
Repeater System
KJCN
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.9
KOREN/APAN-KR 2002Next Generation Internet Workshop
Why is the Number of Limited in Repeaterless System?
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er
distance
Pow
er
Optical Fiber Repeater
Transmitter Receiver
Threshold of receiver
Loss (0.2dB/km)
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.10
KOREN/APAN-KR 2002Next Generation Internet Workshop
Upgrade Strategy
> 3T bit/s / cable
Increasing the # wavelength
- Repeater system
Increasing the # FP(Use the dark fibers)
- Repeaterless system
Cable
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.11
KOREN/APAN-KR 2002Next Generation Internet Workshop
Outline
1. Introduction2. Configuration of Submarine Cable System3. Transmission Technologies - Experimental Results4. How to realize the cable system between Korea and China ? - Network configuration - Cost5. Conclusion
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.12
KOREN/APAN-KR 2002Next Generation Internet Workshop
Key Technologies for Repeaterless System
Number of wavelengths :
- Raman Amplifier- Remote EDFA Amplifier
Remote
Pump Source - Optical Booster and Preamplifier
Optical Booster Optical Pre-amplifier
1~2 (Capacity : 10~20Gbit/s /fiber)
FEC
FEC
- FEC (Forward Error Correction)
Trans-
mitter Recei-ver
~16 (Capacity : ~160Gbit/s /fiber)
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.13
KOREN/APAN-KR 2002Next Generation Internet Workshop
Spectrum after 200km transmission
0.1nm Resolution
-40
-30
-20
-10
0
1540 1545 1550 1555 1560 1565
Wavelength [nm]
[dB
m]
Repeaterless System - 10Gbit/s x 100WDM, 200km -
10
12
14
16
18
20
22
1540 1545 1550 1555 1560 1565
Wavelength [nm]
Q-f
acto
r [d
B]
Transmission characteristics
BER : 10-9
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Optical Fiber
Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Trans-
mitter Recei-v
er Multiplexer Demultiplexer
100WDM 200km
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.14
KOREN/APAN-KR 2002Next Generation Internet Workshop
Key Technologies for Repeater System
Repeater Fiber (~100km)
FEC
Recei-ver
FEC
Trans-
mitter
How to transmit a large number of wavelength……..
1. By making the signal bandwidth wider 2. By making the wavelength spacing narrower
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.15
KOREN/APAN-KR 2002Next Generation Internet Workshop
Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver
Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter
-50
-45
-40
-35
-30
-25
-20
-15
-10
1530 1550 1570
Wavelength (nm)
Pow
er (
dBm
)
-50
-45
-40
-35
-30
-25
-20
-15
-10
1530 1550 1570
Wavelength (nm)
Pow
er (
dBm
)
Output of Transmitter After 9,200km Transmission
Repeater
Recei-ver
Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter Trans-
mitter
5
6
7
8
9
10
11
12
13
0 20 40 60 80 100 120 140 160 180 200
Channel number
Q-f
acto
r (dB
)
BER : 10-9 with super FEC
Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver Recei-ver
9,200km
Repeater System - 10Gbit/s x 200WDM, 9200km -
200WDM
Fiber (~45km)
BE
R
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.16
KOREN/APAN-KR 2002Next Generation Internet Workshop
Outline
1. Introduction2. Configuration of Submarine Cable System3. Transmission Technologies - Experimental Results4. How to realize the cable system between Korea and China ? - Network configuration - Cost5. Conclusion
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.17
KOREN/APAN-KR 2002Next Generation Internet Workshop
Key Factors to Realize the System
- Demand- Feasibility of transmission technologies- Location of cable landing station- Network configuration- Cost
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.18
KOREN/APAN-KR 2002Next Generation Internet Workshop
Comparison of New and Existing Cable Landing Station
Using the Existing Stations is preferable !
New Landing Station Existing Landing Station
Backhaul System New BH systems are required Available to use exist. One
Construction Cost Expensive(10M$-7M$) --
Lead Time Long (about one year) Shorter
Permission Owner's responsibilities
1. Governmental Authorities approvals a) to land a submarine cable, b) of operation and maintenance2. Route Permits, occupancy permits3. Pipeline crossing agreements.4. In-service cable crossing notifications.5. OOS cable removal notifications6. Permits for any duct route construction7. Right-of-Ways for any land crossings8. Agreements with fishermen's unions9. Environmental studies
1. Governmental Authorities approvals a) to land a submarine cable, 2. Route Permits, occupancy permits3. Pipeline crossing agreements.4. In-service cable crossing notifications.5. OOS cable removal notifications
8. Agreements with fishermen's unions9. Environmental studies
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.19
KOREN/APAN-KR 2002Next Generation Internet Workshop
Network Configuration
Taean ( 泰安 ) - Qingdao ( 青島 )
Plan the optical cable system between Korea and China using the Existing cable landing stations.
Distance : ~ 560kmTaean : Exist.Qingdao : Exist.
560km
3 options of Network configuration
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.20
KOREN/APAN-KR 2002Next Generation Internet Workshop
Qingdao : Exist.
Taean : Exist.
Network Configuration
New Station
Repeater System
Option 1
Repeaterless System
Option 2
Repeaterless System +Backhaul System
Option 3
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
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KOREN/APAN-KR 2002Next Generation Internet Workshop
Conditions for Cost Estimation
Initial
After Upgrade
# WDM Bit rate/ # Fiber Pair Total CapacityRepeater System
(Option 1)Repeaterless System
(Option 2)Repeaterless System
+ Backhaul(Option 3)
5 10Gbit/s 1 50Gbit/s / Cable
# WDM Bit rate/ # Fiber Pair Total CapacityRepeater System
(Option 1)96 4
Repeaterless System(Option 2)
Repeaterless System+ Backhaul(Option 3)
3.84Tbit/s / Cable488
10Gbit/s
Note: 5 Repeaters are assumed in Repeater system (Option 1).
May 25, 2002
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KOREN/APAN-KR 2002Next Generation Internet Workshop
Cost for Initial Investment
Price(M$)
Initial
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
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KOREN/APAN-KR 2002Next Generation Internet Workshop
Cost for Upgrade
InitialAfter Upgrade
(Ultimate)
Price(M$)
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
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KOREN/APAN-KR 2002Next Generation Internet Workshop
Terminal Equipment Bay
EDF for remote amplification
LTU with FECfor undersea cable system
WTUUp-streamWTU
Remote EDF
Pump Source Down-stream
Remote EDF
Pump Source
1FP LTU with FECfor undersea cable system
LTU : Line Terminating UnitWTU : Wavelength Terminating Unit
Repeaterless System
LTU(compatible withterrestrial LTU)
WTU
Down-stream
1FP
WTUUp-streamRepeaterLTU(compatible withterrestrial LTU)
Repeater System
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
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KOREN/APAN-KR 2002Next Generation Internet Workshop
The Number of Terminal Bay
Repeater System
Repeaterless System
Qingdao Taean
TaeanQuigdao New Station
Cable
Twice !
LTU Bay
May 25, 2002
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KDDI-SCS
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KOREN/APAN-KR 2002Next Generation Internet Workshop
Conclusion
- Configuration for Repeater system and Repeaterless system were presented.
- The three options of system between Korea and China were shown.
- From the standpoint of the cable capacity and cost, Repeater system is more attractive for the system between Korea and China.
May 25, 2002
KDDI-SCS ProprietaryUse Pursuant to Company Instructions
KDDI-SCS
P.27
KOREN/APAN-KR 2002Next Generation Internet Workshop
Please visit out web site!
KDDI-SCS Home page : http//www.kddiscs.co.jp
N.Takeda (Technical) : [email protected] J.Matsuda (Commercial) : [email protected]
Thank you!