Post on 26-May-2020
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Technology evolution towards 400G
implementation
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• Technology evolution towards 400G implementation
• Case Study: 400G field trial in T-Mobile, Austria
CONTENTS
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© ZTE All rights reserved 3
All about Bandwidth
Live
Broadcast
SD 720 x 576
HD 1920 x 1080
4K 3840 x 2160
Cloud Computing
Cloud Computing
3G 384 Kbps
4G 100 Mbps
5G 10 Gbps
Internet of Things
Source: Cisco
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Technical Solutions of 400G per Channel
Dual Carrier (2x 200G) Commercially available
Signal baud rate 32GBaud
based on PM-16QAM
Signal baud rate 43GBaud
based on PM-8QAM
Signal baud rate ~60GBaud
based on PM-QPSK
Single Carrier (1x400G) (next development cycle)
400G Solutions
Signal baud rate range (32-
64GBaud)
Based on PM-16QAM, PM-
32QAM, PM-64QAM
Novel technologies are
needed to equalize the
bandwidth limitation and
nonlinearity impairment of
opto-electronic components
and DAC/ADC(also low
sampling rate)
Quad Carrier (4x100G) Commercially available
Signal baud rate 32GBaud based on
PM-QPSK with Nyquist/Super-
Nyquist technologies for higher SE
Title: Type: Arial
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© ZTE All rights reserved 5
Advanced DSP for Higher SE and Longer Reach
Viterbi Algorithm (VA) per Lane
MLSE DetectionPost Digital Filter
4 2 0 2 40
1
2
00 10
01 11
0
0
1
0
1
1
1
0
D1
D2
D3
D4
S0=1
S1=-1
t=T t=2T t=3T t=4T
0.0194
3.4622
3.7499
3.4669
0.0241
7.7411
6.4104
0.1049
3.5477
5.2422
0.1681
6.6058
3.1630
17.6007
t=5T
0.2543
6.0745
3.0796
16.8997
Surviving path
D1 ~ D4: trellis path Discarded path
Adaptive impulse response
devised for noise suppression.
Optimal detection towards
symbol correlation.
Soft-value output for TPC/LDPC-SD-FEC
1
2
3
4
30
210
60
240
90
270
120
300
150
330
180 0
PDM-QPSK Super fast than Nyquist signal
PDM-16QAM
6
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Ultra Long-haul Solution – 200G DP-QPSK
Higher symbol rates require next generation (higher bandwidth) optical
component and ADC/DAC technologies。
Not applicable to 50GHz grid
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
12 14 16 18 20 22 24 26 28
Bit
Err
or
Rat
e
OSNR (dB)
QPSK
QPSK, w/o filters
QPSK, w/ filters - 70GHz
QPSK, w/ filters - 45GHz
1.90E-02
1.95E-02
2.00E-02
2.05E-02
2.10E-02
14.5 15 15.5 16 16.5 17 17.5 18
Bit
Err
or
Rat
e
OSNR (dB)
QPSK
QPSK, w/o filters
QPSK, w/ filters - 70GHz
QPSK, w/ filters - 45GHz
• Baud rate – 62.76G
• Tx Waveform – rolloff 0.3
• Mux/demux – 45 GHz, 2nd order Gaussian
• Filtering penalty – 2.7 dB
• With neighbors @ 50GHz, there is an error
floor @ 10-2.
7
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Long-haul/Metro Solution – 200G DP-8QAM/16QAM
• Baud rate – 41.84G (15% Overhead)
• Tx Waveform – rolloff 0.5
For 8QAM, no significant additional penalty from neighbors @ 50 GHz
16QAM is also applicable to such scenarios when Raman-EDFA hybrid
amplifier used.
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
12 14 16 18 20 22 24 26 28 30 32 34
Bit
Err
or
Rat
e
OSNR (dB)
8QAM
8QAM, w/o filters
8QAM, w/ filters
1.90E-02
1.95E-02
2.00E-02
2.05E-02
2.10E-02
16.5 16.6 16.7 16.8 16.9 17 17.1 17.2 17.3 17.4 17.5
Bit
Err
or
Rat
e
OSNR (dB)
8QAM
8QAM, w/o filters
8QAM, w/ filters
• Mux/demux – 45 GHz, 2nd order Gaussian
• Filtering penalty – 0.6 dB
8
Title: Type: Arial
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Data Center Interconnection (Very Short Reach)
Simple structure
Very high spectral efficiency (8bit/s/Hz)
Fit in 100GHz grid in metro and Easy network management
Much lower cost per bit compared to 100G technology
Multi-core in single package further expands bandwidth and reduces power
consumption
9
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© ZTE All rights reserved
100G QPSK 200G 16QAM/8QAM
DCFP/ACFP2/DCFP2, hot pluggable
applied to long haul, metro, regional network
Pay as grow
CFP: mature; ACFP2/DCFP2 approaching
commercial
CFP
CFP2
34W 14082
20W 10742
120W 178127 MSA
2 100G QPSK 2600G 64QAM
Large scale package
Applied to ultra-long haul, long haul, metro, short
reach, DCI
lower cost per bit as a whole
on development
Miniaturization
low power
pluggable
High bandwidth
High speed
Sub-system Development
10
Title: Type: Arial
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Color:The ZTE blue
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© ZTE All rights reserved
ZTE 400G Platform
MU
X
400G
Transpond
er
Lambda
…
…
400G
Muxponder
Lambda
400G
traffic
100G
traffic
Lower power consumption
Lower space occupation
DX41 Shelf
- Trans/Muxponder based
switching
400G
Line
Card
MU
X
400G
Line
Card
Lambda
Lambda
Client
Card
Client
Card
Client
Card
Client
Card
GE
2.5G
10G
40G
100G
……
Flexible accessing of any service type and any granularity
Service grooming via centralized ODUk/POTN switching fabric
S1/S2/S3
Shelves
- (P)OTN based
SW Programmable 400G Cards
MQ4
4X100G Muxponder
(CFP4@client)
LB4kx1
( Single Port ) LB4kx2
(Dual Ports )
Programmable:
Modulation format, Pre-DSP, spectrum shaping,
etc.
100G/200G/300G/400G line rate
2 subcarriers, separated or multiplexed,
100G/150G/200G, QPSK/8QAM/16QAM
Highly integrated
11
Title: Type: Arial
Size:22-24pt
Color:The ZTE blue
Subtitle: Type: Arial
Size:14-18pt
Color: The ZTE green
G143, B212
R140,G198, B62
R90,G203, B245
© ZTE All rights reserved
400G Field Trial in T-Mobile, Austria
400G (DP-16QAM) over 475km Live Link
Simultaneous transmission of 10G/100G/400G Transmission with adjacent 10G, and
100G channels
Smooth implementation of 400G in the live, existing network
400G
100G
WS
U / M
UX
O
A
10G
400G
100G
10G
WS
U / M
UX
Thank you