차세대 dwdm 솔루션 및 방향 - cisco · 50 ghz itu grid wasted spectrum 4 x 100gb/s in...

© 2011 Cisco and/or its affiliates. All rights reserved. 1 1 © 2013 Cisco and/or its affiliates. All rights reserved.

Seoul, Korea

March 28 – 29, 2013

김형관 부장

[email protected]

차세대 DWDM 솔루션 및 발전 방향

Cisco Systems, SP video SE

WXC

MUX

DMX

B

P

WX

C

MU

X

DM

X

B P

WXC

MUX

DMX

P

B

WX

C

MU

X

DM

X

P B

Cisco Connect 2

Cisco Connect Korea 2013

© 2013 Cisco and/or its affiliates. All rights reserved.

• Click to edit Master text styles

Second level

Third level

Fourth level

© 2011 Cisco and/or its affiliates. All rights reserved. 2 2 © 2013 Cisco and/or its affiliates. All rights reserved.

Agenda

DWDM 시장 배경

- 시장 배경 & 진화 방향

차세대 DWDM

- 확장성

- 차세대 ROADM

- IP+Optic

맺음말

© 2013 Cisco and/or its affiliates. All rights reserved. 3

DWDM 시장 배경

- 시장 배경 & 진화 방향



94 EB per mo

31 EB per mo

110 EB

per mo

77 EB

per mo

59 EB

per mo

44 EB

per mo

Source: Cisco VNI Global Forecast, 2011–2016

2011 2012 2013 2014 2015 2016

1984–2012: 1.2 Zettabytes

2016 Forecast: 1.3 Zettabytes

Network Trend

Traffic

Revenues

Time NGN packet services era

Legacy services

era

Costs Network

transformation

YouTube, Twitter,

Facebook, G+, Skype

Business Trend

시장 전망



시장 전망

80+% IP Traffic

2011

~30-50%

~50-70%

2013 2016

20-30% 0─10%

70-80% 90+% Legacy TDM Traffic

이

슈

대량의 트래픽

투자비/운영비 절감

효율적인 IP 전달



확장성

DWDM 짂화 방향

이

슈

대량의 트래픽

투자비/운영비 절감

효율적인 IP 전달

차세대 ROADM IP+Optics


차세대 DWDM

- 확장성



100G 전송으로의 도약

배경

• 10G: 지난 10년 간 전송의 메인 인터페이스 역할 담당

• 메인 트래픽 전홖: SONET/SDH => IP / Ethernet

• 40/80 채널 DWDM 시스템 용량 한계 도달

탁월한 성능의 향상

Capacity + Performance = 빠른 시장 진입

Performance = cost / bit / km



문제점: 전송 손상을 보상하기 위한 DSP 기술이 아직 100G serial rate를 지원하지 못함

솔루션: Modulation 기술 필요 (Dual Polarization DQPSK, ~28Gb/s의 Baud rate 100G 전송)

DP-QPSK는 Modulation (TX) 기술

문제점: 높은 rate의 트래픽 전송으로 인한 전송 손상(CD, PMD, Non-linear effects) 증가

솔루션: Coherent Detection이 가능한 지능형 DSP (Digital Signal Processing)을 통해 보상

Coherent Detection은 Demodulation (RX) 기술

100 Gigabit DWDM 전송 문제와 해결책



100 Gigabit DWDM 전송 기술

Dual Polarization

Quadrature

Phase Shift Keying

With Coherent Detection



100G Module Form Factor

CFP

CXP CXP2

CPAK CFP2 QSFP28 CFP4

MSA spec under definition

DEFINED UNDEFINED

Power consumption

(limited by SIZE)

< 32 W

< 4 W?

< 7.5 W

< 6 W?

< 8 or 12 W?

< 5 W?

< 3.5 W?

Interface Support

4x25G

10x10G

Yes

Yes

No

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

No

Yes

No



파장 당 용량 확장

파장 수 확장

50 GHz ITU Grid Infrastructures

ADC 처리 능력 ~28Gbps

400G & Terabit Superchannels

Modulation 효율 증대

Flexible Spectrum Allocation

100G+ 의 장벽



0

5

10

15

20

25

30

9.6

19.2

28.8

Capacity per Fiber Pair

CP-DQPSK 100G per carrier 96 chs at 50GHz

CP-16QAM 200G per carrier 96 chs at 50GHz

CP-16QAM 200G per carrier

Flex Spectrum

현재 Next Gen

Silicon

Next Gen Silicon &

Flex spectrum

Tera

bit

s p

er S

eco

nd

DWDM system capacity



Superchannel • 여러 개의 subcarriers를 통한 다양한 rate의 superchannel 구성

• 현재 사용 가능한 기술(ADC, DSP)을 통한 1 Tbps 구현


차세대 DWDM

- 차세대 ROADM



ROADM Background

DWDM 망에 Flexibility 제공. Any wavelength. Anywhere.

그러나……..여전히 제한적인 Flexibility



ROADM Background

여전히 Direction, frequency 변경에 물리적 작업 필요

… 왜냐하면 ROADM ports 가 colored & directional 이기 때문



차세대 ROADM Advantage

Colorless & Omni-directional : touch-less flexibility

물리적 변경 없는 자유로운 frequency와 direction 변경



차세대 ROADM Advantage

Contentionless: 여러 방향의 동일한 wavelength가 동일한 Add/drop 포인트로 설정 가능. Dynamic wavelength provisioning을 위한 모든 제약 제거.

…Colorless와 Omni-directional는 add/drop stage에wavelength contention 상황을 유발.



Flex-spectrum ROADM (1)

1 - O

dd

1- E

ven

2 - O

dd

2 - E

ven

3 - O

dd

3 - E

ven

4 - O

dd

4 - E

ven

5 - O

dd

5 - E

ven

6 - O

dd

6 - E

ven

7 - O

dd

100 G

bp

s

400 G

bp

s

1 Tbps Metro

100 G

bp

s

1 Tbps Long Haul

100 G

bp

s

• Standard ROADM: 50GHz ITU Grid

• Flex Spectrum ROADM

• Channel Spacing

Super-channel 지원

파장간 상호 작용으로 인한 non-linear effect 제어

• Modulation format

다른 Bit rate의 파장 혼용 제공

대용량 Bit rate 채널 확장 지원



Flex spectrum ROADM (2)

50 GHz ITU Grid

Wasted Spectrum

4 x 100Gb/s in 200GHz

Efficient Spectrum Use

4 x 100Gb/s in ~125GHz

50 GHz ITU Grid 12.5 GHz Slices

>50% Increase in Capacity

“Superchannels” with varying bandwidths, > 50GHz



What is next ROADM Problem

Bandwidth Growth

Problem

Unpredictable, dynamic traffic demands & tighter SLAs

More

Channels

Solution

More network

capacity

Touchless

Operation Flex

Spectrum

More

Degrees

Solution

Highly meshed,

programmable networks


차세대 DWDM

- IP+Optics



Why IP+Optics?

Rapidly

Changing

Traffic

patterns

Huge

Growth

Tightening

SLA’s

Profitability

비용 절감 안정성 운영 단순화

다양한 서비스

망 최적화



What is IP+Optics

- Data Plane integration

- Management Plane Integration

- Control Plane Integration



Data Plane Integration – IP over DWDM

IP-over-DWDM Key Features

• High performance tunable optics

• G.709 and FEC/EFEC

• Integrated Management and Performance Monitoring

• Lower Capex

• Lower Opex

• Enhanced Resiliency

• Multi-Layer Interaction

DWDM transponder 모든 기능을 Router에 통합

ROADM Router

G.709 DWDM

Interface



Management Integration

• 모듈 방식의 Application

•차세대 네트웍을 위한

A-to-Z management

•저비용 설계

Control plane 만으로 차세대 네트웍을 위한 완벽한 솔루션 제공이 어려움 …

Central

NMS

L2/3

Performance

Management

Transport

EMS

L2/3 Service

Fulfillment

L2/3 Network

EMS



Control plain integration

Peer Model Overlay Model

Single Domain Routed Domain

Optical Domain

Information Exchange

Information Exchange

Two key models



Multi-Layer Control plain - nLight

- Overlay 구조

- GMPLS UNI 를 통한 L0 – L3 정보 교홖

- MPLS CP와 WSON CP의 Automatic Bandwidth service

- Multi layer network planning & optimization

GMPLS

UNI

Control Plane

WSON MPLS

GMPLS

UNI MPLS

Client: IP/MPLS Control Plane

Server: DWDM WSON Control Plane

GMPLS-UNI

R1 R2 R3

O1 O2 O3



Impairment aware DWDM CP (WSON)

nLight Architecture

GMPLS-UNI

Information sharing

ML restoration

Optical path optimization

Optical layer maintenance



GMPLS-UNI

UNI-C

MSTP

Router

UNI-N

GMPLS

UNI



Wavelength switched Optical Network (WSON)

• GMPLS control plane which is “DWDM aware”:

LSP are wavelength and,

the control plane is aware of optical impairments

WSON enables lambda setup on the fly

WSON enables lambda re-routing

WSON enables a lambda revalidation against a failure reparation



Optical Control plain- WSON

Elements of an OCP

Resource Discovery

Topology Discovery

Traffic Provisioning

Traffic Restoration

Network Restoration

Network Optimization

Requirements

Tunability Colorless Omni-Directional Impairment-

aware


맺음말



100G 400G 1T

차세대 ROADM

IP + Optics

400G,1T

16QAM 100G CPAK

Color-less Omni-

Directional Contenti

on-less 100 G

bp

s

400 G

bp

s

1 Tbps Metro

100 G

bp

s

1 Tbps Long Haul

100 G

bp

s

Flex-spectrum 16 degree

ROADM

MSTP MSTP

IPoDWDM nLight

WSON


Thank you.

차세대 dwdm 솔루션 및 방향 - cisco · 50 ghz itu grid wasted spectrum 4 x 100gb/s in...

Documents