Transcript The Drive to 100 GigE

100 GbE
Network implementations,
challenges and testing
Joerg Packeiser
Director Product Line Management Optical Transport
JDSU Communications Test & Measurement
Optical Expo 2007, Dallas
100 GbE Ethernet Activities
Ethernet Transport:
Aggregate Bandwidth >> 100Gbit/s
 Multi-Lane Connections
 100 Gbit/s per Wavelength
CPE:
No 100Gbit/s NICs
before 2015
Data center
nx100G DWDM
Cool
Metro/Core
4x25G CWDM
Short Range
100Gbit/s per port
<40km
IEEE HSSG Focus
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100GbE is not always 100Gbit/s Serial
Approaches: optimized for area of implementation
100GbE
MAC
Data Centers
Short Reach
<100m MMF or
<10m Copper
10x10G
10x10G MMF
Campus Networks
Metro
Intermediate Reach
10km SMF
Long Reach
10-40km
10x10G
5x20G
4x25G
Current Focus of IEEE HSSG
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4x25G
Long Haul
Serial 100G
ODU2-11v
ODU3-3v
ODU4
100GbE MAC with 64/66 coding
=> 103Gbps of data
100 GbE Challenges
Technology:
New modulation formats with high spectral efficiency
(Duobinary Code, DQPSK,…)
Compatibility with currently-installed optical line equipment
(DWDM Grid, EDFAs, etc.)
Compensation of transmission impairments (Noise, CD, PMD,…)
Cost of 100GbE transceivers
Processing of 100Gbit/s data streams
─ Algorithms for parallel processing
─ Standardized Interfaces between functional blocks, (cf. SFI-5 Interface, defined by
IF for 40Gbit/s)
─ Backplanes
Networks:
Common network structure for Ethernet and Transport (telecom & data)
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JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
How does Ethernet scale for Transport?
 SONET/SDH/OTN scales by factor of 4 (2.5G, 10G, …)
 Ethernet scales by factor of 10 (100ME, 1GE, …)
 100GbE: opportunity to combine both worlds
SONET/SDH
x4
OC-3
155M
OC-12
622M
OC-48
2.5G
OTN
Ethernet
x4
x10
100ME
1GbE
OTU-1 2.7G
OC-192 10G
OTU-2 10.7G
OC-768 40G
OTU-3 43G
OTN
Overclock
11.1G
x4
44.4G ?
Bitrate
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10GbE
100GbE
Modulation formats for long haul transport
RZ/NRZ
100G elec.
Data Rate (Gbps)
100
QPSK
50G elec.
RZ/NRZ
40G elec.
40
RZ/NRZ
10G elec.
QPSK
20G elec.
e.g. POLMUX QPSK
25G elec.
10
1
2
bit/symbol
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 Long haul transport of 100G serial will require multi-level modulation
(X bits per symbol) to run over existing long-haul networks
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JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Options for Ethernet Transport (Example)
CPE
Device
Physical layer aggregation vs.
modulation schemes
critical factors: time to market, link managment
10 Lane
100m PMD
4 Lane
10km PMD
Ethernet UNI
Service Demarcation
Point
NE 1
NE 2
ODU2-11v
9.995 Gbit/s x11
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aggregation
(+modulation)
modulation
aggregation
NE 3
ODU4 Serial I/F
110…130 Gbit/s
CPE
Device
NE 4
ODU3-3v
40Gbit/s x 3
100G Test Applications – What’s different?
Test requirements
Compare to 10GbE
 100GbE MAC/PCS Layer Tests
As 10GbE
– Frame /Block Generation / Analysis
 100GbE End-to-End QoS
As 10GbE
– Ethernet Frame Transmission
– Ethernet OAM Functions
 100GbE /OTN Interworking
Not standardized
for 10GbE
 100Gbit/s Interface/Signal Quality
New standards
t.b.d.
- Stressed Eye/Jitter/Eye diagram
 Transmission Impairments
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New, dependent
on implementation
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
JDUS T&M Technical Approach
 Cooperation with Component and System Manufacturers
– Front ends
– Fast digital circuits
– Hooks“ for measurement applications in 100GbE components
 Participation in Research Programs
– Packet100 (planned)
 Active Participation in Standardization
– Tracking interface definition and system specification
– Definition and standardization of measurement methods and
instruments
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