차세대 dwdm 솔루션 및 방향 - cisco · 50 ghz itu grid wasted spectrum 4 x 100gb/s in...
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© 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
차세대 DWDM 솔루션 및 발전 방향
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WX
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WXC
MUX
DMX
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WX
C
MU
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Cisco Connect 2
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Second level
Third level
Fourth level
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Agenda
DWDM 시장 배경
- 시장 배경 & 진화 방향
차세대 DWDM
- 확장성
- 차세대 ROADM
- IP+Optic
맺음말
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DWDM 시장 배경
- 시장 배경 & 진화 방향
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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
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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
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확장성
DWDM 짂화 방향
이
슈
대량의 트래픽
투자비/운영비 절감
효율적인 IP 전달
차세대 ROADM IP+Optics
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차세대 DWDM
- 확장성
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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
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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
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100 Gigabit DWDM 전송 기술
Dual Polarization
Quadrature
Phase Shift Keying
With Coherent Detection
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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
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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
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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
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Superchannel • 여러 개의 subcarriers를 통한 다양한 rate의 superchannel 구성
• 현재 사용 가능한 기술(ADC, DSP)을 통한 1 Tbps 구현
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차세대 DWDM
- 차세대 ROADM
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ROADM Background
DWDM 망에 Flexibility 제공. Any wavelength. Anywhere.
그러나……..여전히 제한적인 Flexibility
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ROADM Background
여전히 Direction, frequency 변경에 물리적 작업 필요
… 왜냐하면 ROADM ports 가 colored & directional 이기 때문
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차세대 ROADM Advantage
Colorless & Omni-directional : touch-less flexibility
물리적 변경 없는 자유로운 frequency와 direction 변경
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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.
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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
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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
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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
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차세대 DWDM
- IP+Optics
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Why IP+Optics?
Rapidly
Changing
Traffic
patterns
Huge
Growth
Tightening
SLA’s
Profitability
비용 절감 안정성 운영 단순화
다양한 서비스
망 최적화
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What is IP+Optics
- Data Plane integration
- Management Plane Integration
- Control Plane Integration
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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
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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
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Control plain integration
Peer Model Overlay Model
Single Domain Routed Domain
Optical Domain
Information Exchange
Information Exchange
Two key models
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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
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Impairment aware DWDM CP (WSON)
nLight Architecture
GMPLS-UNI
Information sharing
ML restoration
Optical path optimization
Optical layer maintenance
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GMPLS-UNI
UNI-C
MSTP
Router
UNI-N
GMPLS
UNI
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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
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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
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맺음말
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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
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Thank you.