The Future of Ultra High Capacity Networks

Transcription

Maximizing Network Capacity, Reach and Value
Over land, under sea, worldwide
Xtera Communications, Inc.
The future of Ultra High Capacity Networks
Terabit Optical & Transport SDN 2013 (Cannes, France)
16 April 2013
© 2012 Xtera Communications, Inc. Proprietary & Confidential
1
Content
•
Options for Increasing the [Capacity x Reach] Metric
•
What Should the Ideal Next-Gen Amplifier Look Like?
•
How to Transport 15Tbit/s Capacity over Ultra-Long Reach?
•
100G for Subsea Applications
•
Summary
2
Future High Capacity Networks
•
Challenge of managing and supporting rapidly increasing traffic levels
on existing optical transmission infrastructures
•
Today’s answer:
•
Basic principle: Continue the tradition of tightly coupled line and client
side interfaces
•
Our view: Decouple the line and client side interfaces allowing each to
grow independently
•
Allowing the re-use of what you’ve owned for more cost effective
transition to tomorrow’s network
100G system using PM-QPSK coherent technology with advanced FEC
for longer range
3
Why De-Coupling?
•
The Client side and the Line side have different justifications for growth
•
Basically the client side interface growth is for better and more efficient
handling of traffic
– Less ports
– Bigger pipes
– Higher bit rate traffic
•
The line side growth is for higher system capacity for lower transmission
cost
–
–
–
–
–
•
Longer Range
System Capacity
Ability to transport higher bit rate traffic
Lower cost
Ability to reuse existing system
From a system standards perspective
– IEEE is responsible for the Ethernet Based Client side interface
– ITU-T is responsible for the transport of traffic between two nodes
4
Options for Increasing the
[Capacity x Reach] Metric
5
Options for Increasing Line Capacity
•
EDFA-constrained line optical bandwidth (about 36nm)
 One way to increase line capacity is to increase spectral efficiency at the
line interface card level.
I
I
Bits per symbol
(Increase
constellation size)
Soft-decision FEC
(Increase
coding gain)
01
11
00
10
Q
1101
1001
0001
0101
1100
1000
0000
0001
1110
1010
0010
0110
1111
1011
0011
0111
Q
QPSK
16-QAM
Symbols per
second
(Increase
symbol rate)
Super channel
(Group of denselypacked waves)
 Higher cost and complexity
on a per wavelength basis
6
Options for Increasing Line Capacity
•
There is another dimension which can be explored: line equipment/fiber.
 Silica-based fiber has a huge bandwidth which is not fully exploited –
Two other bands already defined by the ITU-T, L-Band and S-Band
I
I
Bits per symbol
(Increase
constellation size)
Soft-decision FEC
(Increase
coding gain)
01
11
00
10
Q
1101
1001
0001
0101
1100
1000
0000
0001
1110
1010
0010
0110
1111
1011
0011
0111
Q
QPSK
16-QAM
Symbols per
second
(Increase
symbol rate)
Common line equipment
• Broader optical amplifier bandwidth
• Lower-noise amplifiers
• Distributed amplification in the line fiber
to lower the amount of nonlinear effects
• New fiber types (e.g. new subsea builds)
Super channel
(Group of denselypacked waves)
 Extra cost shared
by all the wavelengths
7
What Should the
Ideal Next-Gen Amplifier Look Like?
8
Definition of the Ideal Next-Gen Amplifier
•
Consensus on the generic answer: Advanced amplifiers!
•
OK but what is beyond this nice terminology?
Answers from operator/supplier community are as follows:
–
–
–
–
•
Lower-noise amplifier for better output OSNR
Transient suppression
Broader optical spectrum
Lower per channel power to limit fiber nonlinearities
Most common technical options:
– Hybrid Raman/EDFA
– All Raman
•
Both options offer advantages and disadvantages depending on
applications and network architectures.
9
How to Transport 15Tbit/s Capacity over
Ultra-Long Reach?
10
System Configuration
(19 Spans)
System Configuration
(19 Spans)
#01
19.9 dB
#07
22.2 dB
#13
20.9 dB
#02
22.1 dB
#08
19.7 dB
#14
21.7 dB
#04
21.8 dB
#03
22.4 dB
#09
21.0 dB
#15
21.4 dB
#05
21.1 dB
#10
21.4 dB
#16
22.7 dB
#11
22.5 dB
#17
21.8 dB
#18
22.0 dB
#06
19.6 dB
#12
20.1 dB
#19
21.7 dB
100% Raman Design
11
OSNR and Optical Power Results (19 Spans)
Signal power remains < 0.0 dBm over entire spans
12
Power Spectrum, MPI, & Dispersion (19 Spans)
13
15Tbit/s Trial Summary
•
Trial using a standard single mode fiber with typical span parameters
indicates that it is possible to increase the fiber capacity to 15Tbit/s
using both the C and L bands with all Raman amps and 100G using
currently available production systems
•
For an existing system, the only equipment that needed to be replaced
are the amplifiers. Most existing equipment, including the 100G systems
can be re-used.
•
No need to perform traffic grooming or other network re-arrangements
•
Standard 50GHz channel spacing will be used.
•
Technology available today to expand the capacity to 24Tbit/s per fiber
pair
•
Future channel bandwidth compression techniques can further improve
the overall system capacity to even a higher number
•
This process will not preclude the migration to systems beyond 100G in
the future
14
100G for Subsea Applications
15
Additional Optical Gain Provided by ROPA
(Remote Optically-Pumped Amplifier)
•
Optical channel power profile along a 367.5km unrepeatered cable
•
ROPA inserted 107km before the receive terminal
70 wavelengths
Gain from
forward
Raman
pumping
Fiber attenuation
Gain from backward
Raman pumping
Gain
from
ROPA
Optical
Supervisory
Channel (OSC)
260.5 km
Gain inside
the receive
terminal
107 km
ROPA
Forward
Raman
pumping
Direction of
transport
Backward
Raman
pumping
16
Ultra Long-Span Links
•
Unrepeatered, single-span configuration:
– 34 x 100G on 74dB / 420km
– 8 x 100G over 80.8dB / 480.4km (presented at OFC/NFOEC 2013)
•
Two-span configuration:
– 8 x 100G over 2 spans / 120dB (presented at OFC/NFOEC 2013)
•
One parameter to assess unrepeatered transmission technologies:
Raman pump power required in the line.
Reference
Total No CHs x Bit
Capacity
rate (ch
(Tb)
spacing)
Coherent
Signal Format
Processing
Distributed Raman Pump
Power (W)
Span Info
Fiber Type
ROPA
Length
Loss (dB) Forward Backward
(Km)
Total
ALU, ECOC 2009
2.6
26x112 Gb/s
(50GHz)
PDM-QPSK
Offline
E-PSCF (115mm2)
YES
401
67
5.5
5.5
Corning, ECOC 2010
4
40x112 Gb/s
(50GHz)
PM-QPSK
Offline
EX1000, 2000, Dev
(76mm2, 112mm2,
128mm2)
No
365
59.6
0.73
0.73
ALU, ECOC 2010
0.16
4x43 Gb/s
(100GHz)
PDM-RZ-BPSK
Offline
EX2000 (115mm2)
Yes
525
84
?
?
ALU, OFC 2011
2.56
64x43 Gb/s
(50GHz)
PDM-RZ-BPSK
Offline
E-PSCF (115mm2)
Yes
440.7
71.5
5.3
5.3
Xtera, ECOC 2011
0.8
8x120 Gb/s
(100GHz)
PM-NRZ-QPSK
Offline
Z (Legacy, 76mm2)
Yes
444.2
76.6
1.40
1.35
2.75
ALU, ECOC 2011
0.4
4x100 Gb/s
(50GHz)
PDM-QPSK
Real Time
ULA-PSCF, E-PSCF
(135mm2, 115mm2)
Yes
462
76.9
3.9
6.3
10.2
Xtera, OpticsExpress 2011
0.2
2x120 Gb/s
(100GHz)
PM-NRZ-QPSK Real Time
Z (Legacy, 76mm2)
Yes
313
(+VOA)
79.2
1.45
1.37
2.82
Xtera, Press Release 2012
2.6
26x120 Gb/s
(100GHz)
Z (Legacy, 76mm2)
Yes
424
74.2
1.39
1.52
2.91
ALU, OFC 2012
Xtera, ECOC 2012
2.56
64x43 Gb/s
(33GHz)
Real Time
ULA-PSCF, E-PSCF
(135mm2, 115mm2)
Yes
468
76.1
6.3
6.3
Xtera, ECOC 2012
3.4
34x120 Gb/s
(50, 100GHz)
Z (Legacy, 76mm2)
Yes
432.8
74.4
1.48
1.61
3.09
383.5
66.7
1.49
1.43
2.91
Xtera, IPC 2012
1.2
PDM-RZ-BPSK
12x120 Gb/s
(100GHz)
2
Z (Legacy, 76mm )
2
No
SMF (Legacy, 80mm )
66.8
© 2012 Xtera Communications,
Inc. Proprietary & 342.7
Confidential
?
17
Gulf Bridge International
100G Submarine and Backhaul Networks
Milan
• Same platform for
– Submarine route between Alexandria
and Mazara del Vallo
– Backhaul networks in Italy and Egypt
• Optical Line protection for backhaul
networks
Mazara del Vallo
• 8,000km of 100G optical routes
Alexandria
Working terrestrial route
Protection terrestrial route
Submarine cable system
Zafarana
18
Gulf Bridge International
100G Submarine and Backhaul Networks
•
Submarine route between Alexandria and Mazara del Vallo
– Regional repeatered submarine cable system (about 2,000km long)
– Long spacing between submerged repeaters
– First 100G repeatered submarine cable system in commercial service
(since Q1 2012)
•
Backhaul networks in Italy and Egypt
– Long spans between sites due to site skipping (because of leased fibers)
– Mix of fiber types
– Working and protect routes with OTS/span protection.
•
Same platform and same 100G technology for both land and subsea
parts of the network
19
Summary
20
Summary
•
100G technology deployed since 2011:
– First to deploy Soft-decision FEC
– 40nm CMOS technology
– (Next product uses 28nm CMOS)
•
With rapid traffic growth and improved economics,
100G is the new 10G
– In multiple applications (including subsea)
– Leading to higher volumes
– Reducing costs
•
100G technology offers 15Tbit/s line capacity
over 3,000km – Today.
– Enabled by innovative optical amplification
technologies
•
De-coupling of client from line interfaces allows
Independent growth for maximum ROI
8
10
12
14
16
6
18
4
20
2
22
0
24
Tb/s
21
Maximizing Network Capacity, Reach and Value
Over land, under sea, worldwide
22

The Future of Ultra High Capacity Networks

Transcription

Similar documents

Silego Technology - Globalpress Electronics Summit

Convergence Challenges for the SME

Slides

Manufacturing Energy Management Solution (MEMS)

Inphi High Performance Analog Solutions for Cloud Computing

Proprietary and Confidential — AREA 17

Cybex Trazer

2 aeronautical industries to materials a4m 8 2 13 salvato

Business Group Admin