Technology evolution towards 400G...

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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

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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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© ZTE All rights reserved

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


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



• 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.

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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

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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

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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

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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

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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

Technology evolution towards 400G...

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