Challenges and Opportunities in

Cloud-Era Optical Networking Xiang Liu

Huawei Technologies

ON2020 Workshop at OFC’17

Acknowledgement:

Collaboration with many colleagues in Huawei

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Challenge 1: Data Explosion Driven by DC & Video

West East

North

South

Traffic from users：0.93.6

DCI Traffic：0.362.25

1, Video as a dominant

service, CAGR 22%

2, 7 Billion People to People

connections & 1,500 Billion

Thing to Thing connections

DC Interconnection

Port # within DCI

increasing 50% per year X

4

by 2

021

X 6 by 2021

From OVUM

ZB(1021)/year

ON2020 Workshop at OFC’17

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Challenge 2: Faster & Faster Networking!

DC Disaster Recovery

≤1ms

intra-city disaster recovery

< 1ms UHD Video

online video 20ms

Desktop Cloud

~30ms

Finance/Trading

HFT ~ 1ms

• Low latency brings better service experience for UHD video and Cloud App

• Low latency guarantees the reliability of disaster recovery

• Financial companies pay extra money for 1ms latency advantage

ON2020 Workshop at OFC’17

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For operator, 12%~13% TCO on equipment, but 30%

TCO on OPEX

CAPEX OPEX VS

20~50 equipment/person

by Operators

Challenge 3: High OPEX & High Power Consumption

NMS

Planner

Commissioning Toolkit

Monitor Designer

2G

DSLAM

Leased Line FTTH

3G LTE

Leased Line

SDH/MSTP IP MW

OTN

High OPEX 10,000 servers/person

by Google

SDH

W/bits

WDM/OTN

72%

Power

Consumption

(10KW+)

Bandwidth

(30T+/Rack)

For operators, power consumption is increasing rapidly

along with the growing bandwidth requirement and the

aging of legacy SDH networks

TDM MW

WDM

Isolated & Closed System

ON2020 Workshop at OFC’17

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Low Cost &

Low Power

Simplified &

Optimized Cloud

Computing

Flexible &

Open

T-SDN

Metro Core-OTN

100G/

Super100G

Ultra-Broadband

Access Ultrahigh-Speed

Core

Ultrahigh-Capacity

Metro

Access, Enterprise,

Data Centers

Microwave

Edge Cloud Access Cloud Center Cloud

Enterprise

Home

Mobile

Challenge 4: Easy & Optimal Management via T-SDN

ON2020 Workshop at OFC’17

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2016 2017 2019 2018

320T-640T OXC

96 λ @ C

Cluster OTN

600G Single λ

TSDN BoD TSDN OVPN

C+L

Coherent CFP2

AI/Big Data TSDN Slicing

Blade OTN 100G ULH CFP

ULH 200G LH 200G

Opportunities for Innovations at All Layers

ON2020 Workshop at OFC’17

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Electrical Layer (1): Higher Throughput, Lower Cost/bit

<80km 600km 2000km 3000km

Ultra-Long

Backbone

Backbone

Short

Reach

DCI

QPSK/8T

QPSK/8T

100G

200G

400G

600G

8QAM/12T 16QAM/16T

16QAM 25T

Metro

64QAM 38T

300km

100G 3000km

200G 2000km

ON2020 Workshop at OFC’17

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Electrical Layer (2): Smaller & Greener!

2 ports per card

60W each

100G~600G Flex

4 ports per card

32W each

MSA-like Reach

8 ports per card

20W each

Integration-enabled

100G/200G MSA 100G/200G CFP 100G/200G CFP2-DCO

oDSP 28nm16nm7nm

Power reduction

Silicon Photonics Component density per cm2

1 10100

ON2020 Workshop at OFC’17

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Optical Layer: Higher Capacity, Smarter, and More Flexible

OA OA

OTU

OXC

OTU MU

X/D

EM

UX

MU

X/D

EM

UX

C-Band C-Band

32nm

… …

40nm

96 λ@C band OXC

320T OXC One Slot

One Board

One Direction

• Next phase:

C+L Bandwidth

increase by 100%

• Extended C:

Bandwidth increase

by 20%

• 320~640 Tbits Centralized

Switch

• 32 Directions

• “0” Latency Switching

• 90% Space & Fiber Saving

• Low Power Consumption

ON2020 Workshop at OFC’17

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Transport SDN: Supporting Cloud C&M

OSS/BSS 3rd Party APPs Step 1:

Agile Service

xx Weeks to xx Mins

VIP

Step 2:

Resource Pooling IP MW

SDH/MSTP OTN

TDM MW

WDM

Step 3:

OAM Automation L0/L1 Survivability Analysis

Unified Portal UI

Network Cloud Engine

Configuration Management

Resource Management

Path Control

Data Analysis

Plan View Control Analysis

Survivability Improvement

OAM Automation

ON2020 Workshop at OFC’17

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Flex Grid

…

50GHz 150GHz-200GHz

Wavelength

10

0G

1T

40

0G

75GHz-87.5GHz

20

0G

50GHz

10G

12.5GHz Fragment 12.5GHz Fragment Planning

Multi-rate/spectrum hybrid

Minimize fragment Minimize wave plane

Provisioning

Wavelength continuity Less Fragment Real-time provisioning

Optimization

Interrupt traffic Spectrum migration Defragmentation speed

C-Band 196.0Thz 192.1Thz

C.S.= n*50Ghz

C.S.= n*37.5Ghz Reserved

Flex-Grid Planning Algorithm

Flex-Grid Routing Algorithm

Spectrum Optimizing Algorithm

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TSDN: Better Coordination w/ the Physical Layer

ON2020 Workshop at OFC’17

FMFB (Flexible-modulation & Flexible-Bandwidth)

Flexible-Grid Superchannel enabled

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ON2020 Workshop at OFC’17

Orchestrator

DC Controllers

Application

Inter-Damion Mgmt Service Module Policy Mgs ……

BoD Automation OVPN / VTS ……

Southbound

Northbound

T-SDN Controller

IDC

Enterprise Metro Backbone

IDC

Enterprise

API

Transport SDN Super-Controller

1st Domain SDN Controller

3rd Domain SDN Controller

NBI NBI

TIP: Transport Service IDE

T-API

Open NBI

2nd Domain SDN Controller

NBI

Vender A Vendor B Vendor C

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TSDN: Open & Multi-Vendor “Network-on-Demand”

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Facing the Challenges &

Opportunities brought by

DCI, Video,VR, 5G, IOT…

our Optical Networking

community can work

together to continuously

innovate and contribute to

our society in the Cloud Era

towards 2020 and beyond!

ON2020 Workshop at OFC’17

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