Perspectives of Beyond 100G
Yiran Ma
China Telecom
Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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
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%
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
Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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
Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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
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
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
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
Outline
The driven force of large pipe
100G
Beyond 100G
Transport SDN
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
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
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
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
High Capacity Transmission is the Physical foundation of information society!