Perspectives of Beyond 100G - OFC Conference Watch and S… · systems Receiver Coherent receiver...
Transcript of Perspectives of Beyond 100G - OFC Conference Watch and S… · systems Receiver Coherent receiver...
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Perspectives of Beyond 100G
Yiran Ma
China Telecom
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Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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Driven by IP and Broadband Traffic
Increase of IP traffic:
Global CAGR: 23%
2015: Enter ZB era (Z: 1021)
China CAGR: >35%
Increase of Users:
CT fixed BB users: reach 100M in 2013, CAGR>40%
Bandwidth per user: typically 4M, increase to 20~100M
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Driven by “Broadband China”
Broadband China—National Strategy Targeted for 2015 and 2020
End of 2015 Fixed BB Penetration:>50% Fixed BB bandwidth: 4Mbps in rural area; 20Mbps in urban area; 100Mbps in large cities Mobile BB (3G/LTE) Penetration: >32.5% BB(Fixed or Mobile) coverage: 95%
End of 2020 Fixed BB Penetration:>70% Fixed BB bandwidth: 12Mbps in rural area; 50Mbps in urban area; 1Gbps in large cities Mobile BB (3G/LTE) Penetration: >85% BB(Fixed or Mobile) coverage: 98%
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Driven by Emerging Services
Data Center Interconnect(DCI) Cloud computing dramatically increases the status of DC in the Internet infrastructure Carrier’s DCs: Change the network topology ISP’s DCs: Explosive traffic/bandwidth requirements ISPs tend to establish their own WDM networks
Financial and Exchange Industry Desire for low latency transmission Cost insensitive: time is gold Bigger pipe means quicker transmission and coherent promises more
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Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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What technology for 100G—Coherent PM-QPSK
Transmitter PM ½ bit-rate QPSK ¼ bit-rate Reduce the performance
requirements on components and systems
Receiver Coherent receiver with local
oscillator(LD) ADC is a key component Transfer the complexity to electrical
domain (DSP) : CD/PMD compensation, time/phase recovery, etc.
100G optical coherent transmission technology is a milestone in the history of optical fiber communications
Unified solution collects the efforts from whole industry, accelerate the commercialization
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Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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What’s beyond 100G?
200G Single carrier: PM-16QAM(32Gbaud), PM-QPSK(64Gbaud) Pros: Promising lower cost vs. 2*100G Cons: No 200G client
400G Most likely because IEEE chooses 400GE Single carrier is possible but performance is poor: PM-16QAM(64Gbaud) Multi carriers are recommended as a commercial solution
1T(1000G) Definitely multi carriers, higher spectral efficiency required Super channel : OFDM, Nyquist WDM
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What technology for 100G+ ?
Inherited from 100G Polarization multiplexing(PM) Coherent detection
Developed based on 100G Higher order modulation Higher gain FEC
New Technology Super Channel
Multi-Carriers WDM Nyquist WDM OFDM
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Comparison of 100G+ transmission solutions
200G 400G 1T
Modulation Format
PM-16QA
M
PM-QPSK
PM-16QA
M
2SC PM-
16QAM
4SC PM-
QPSK
10SC PM-
QPSK
5SC PM-
16QAM
5SC PM-
QPSK OFDM
Baud-rate 32G 64G 64G 32G 32G 32G 32G 64G N/A
# of carriers 1 1 2 2 4 10 5 5 N/A
Nyquist shaping N N N Y Y Y Y Y N
Distance (km) ~500 >1000 <200 ~500 >1500 >1500 ~500 >1000 >1000
Maturity *** ** ** *** **** **** *** ** *
Chip set R N N R R R R N N
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Development of fiber technology
Evolution based on SMF Reducing loss: LL(Low Loss), and ULL(Ultra Low Loss) Expanding core area: Introduce G.654 fiber into terrestrial WDM systems
New fiber (FMF, MCF)
China Telecom’s trial 1T Nyquist WDM real-time system, 24 hours error free Four type of fibers comparison: G.652 SMF/LL/ULL, G.654 2000km(20*100) with 1.7~3.0dB Q margin in different fibers 3200km(32*100) mixed G.652 ULL/LL fibers with 1.2dB Q margin
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Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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RRU
RRU
RRU
BBU
CPRI
Controller
North: Open API
Third party APP
IP/DC controller
APP China Telecom Cloud
Enterprise
MPLS
OTN
λ
MPLS
OTN
λ
Central cloud
CR
DC
South:Control
OLT ETH/
MPLS
OTN
Aggregation Metro Core
East/West:Cooperation
Considered Structure of Transport SDN
Through south bound interface, optimize and control transport network from end to end
Through east/west bound interface , cooperate with other controllers to decrease TCO
Through north bound interface, accommodate various applications
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From manual and static configuration to real-time dynamic configuration
Global optimization of network resource to avoid conflict
Automatic OAM: fast service provision, online service analysis, resource
occupation alarm
Use Case:Increase OAM Capability
GMPLS/OF
GMPLS/OF GMPLS/OF
T-SDN Controller
Openflow
网络服务
PCE+
PCEP+
North API
OpenFlow
Service East/WestNMS
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Use Case:Multi-vendor/domain Enhance networking through standard open interface
Now:Hierarchical SDN controllers with multi-domain controller over vendor controllers
Future:Standardization of network element interface. Control directly!
Scenarios:
OTN network with multi-vendor access
Core OTN/WDM network with multi-vendor and multi-domain networking
controllerEMS
A Subnet B Subnet
DCN DCN
controllerEMS
CDPI CDPI
Multi-domain controller
CVNI CVNI
API CVNI
APPUser
controllerAPI
APP
Qx Qx
CVNI: Control Virtual Network InterfaceCDPI: Control Data Plane Interface
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Use Case:New Services
Transport Network
Controller
DC Controller
User A Controller
User B Controller
3rd party applications , such as intelligent leased line and virtual operation
Intelligent leased line
Adjustment of leased line bandwidth by users: self-adjust through portals or automatic setting
Virtual transport services(VTS)
Virtualized transport network for enterprise users and virtual operators
Customized network control and management for enterprise users
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High Capacity Transmission is the Physical foundation of information society!