Transcript Title Here - インプレス R&D

Technologies for 40G Systems
- Testing Issues at High Bitrates
Ines Brunn
Lab & Manufacturers Solutions Manager
[email protected]
The Need for Speed in Transmission Networks
100GE
Ethernet
40GE
Increase of capacity
by 4 and by 10
?
SDH/SONET
10GE
40G
1GE
100BASE
10BASE
43G
40G
10.7G
10G
2.7G
2.5G
40G technology is ready
622M
OPEX reduction by
- Saving footprint
- Saving power consumption
- Fewer points of failure
155M
end 80‘
2
© 2007 JDSU. All rights reserved.
OTN G.709
end 90
2006‘
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40G Trends
Worldwide WDM Port Shipments by Speed
50.000
OC-192
10.164
25.373
18.935
14.026
38.694
31.716
30.000
31.137
20.000
12.814
OC-768
45
CY05
88
483
4.344
CY06
CY07
CY08
CY09
Year
• High bandwidth demand driven by IPTV, VoIP and VoD
• 40/43G field installation taking place
3
© 2007 JDSU. All rights reserved.
40.000
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
10.000
0
CY10
Example of 40/43G Transport System
 Router connectivity 40G
 Interconnect at OTU3 layer
Client Interfaces
40 Gb/s
OTN G.709 FEC
STM-256/OC-768
43 Gb/s
OTN Service
MUX
Terabit
Router
Line Interfaces
FASOTU
ODU
© 2007 JDSU. All rights reserved.
FEC
modulation formats and FEC
(proprietary)
OTU3
4
Client
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Different 40G Deployments
New services, new technologies at the network edge,
growing traffic. Traffic will be aggregated in powerful core
routers.
Regional
Networks
Metro
Networks
Metro
Core
short reach IF on routers
reducing the number of interconnecting fibers
within CO lowering cost, space and power
consumption
long-haul networks
lowering cost per managed bit per km
possible migration to existing line systems
metro-regional networks
(city hopper application) reducing
the up-front cost compared to CWDM/DWDM
5
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Different ROADMs
1. LONG HAUL
>400 km distances
80+ channels
2D+
40G compatibility
<10 channel add/drop
50GHz
2. LONG HAUL – METRO INTERCONNECT
40 channels
4D+
5x1 WSS
ROADM
(1)
ROADM
40G compatibility
<10 channel add/drop
50GHz
Long Haul
ROADM
ROADM
(2)
3. METRO
10-400 km distances 40G compatibility
<10 channel add/drop
40 channels
100GHz
ROADM
(3)
Metro
4. METRO – ACCESS INTERCONNECT
40 channels
4D+
1x9 WSS
5. ACCESS
<40 km distances
40 channels
6
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<10 channel add/drop
100GHz
ROADM
(4)
Access
2-4 channel add/drop
100GHz
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
ROADM
(5)
ROADM
Advanced Modulation Technologies
7
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Technical Challenges for 40G Transmission (vs 10G)
 4x greater optical signal bandwidth
 16x reduction of dispersion tolerance
– dispersion slope now important





4x reduction of Rx sensitivity
4x reduction of OSNR tolerance
4x reduction of PMD tolerance
Weaker tolerance to optical nonlinearities
Increased departure of electronics performance from the
ideal
 Requires more accurate transmission fiber characterization
8
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Modulation Format Landscape
Direct Detection



Coherent Phase Detection
Modulate amplitude only
Simple Tx and Rx
Baud rate: equal to bit rate


OOK
Encode phase of bits
Coherent detection recovers full E-field
– Enables electronic CD and PMD
compensation
– Electronic polarization demultiplexing
–
Differential Phase Detection



Encode phase relationship of adjacent bits
– “0”: same relative phase
– “1”: p relative phase
1-bit delay for phase comparison and
balanced Rx
Baud rate: ½ to 1 of bit rate

Tx DFB serves as local oscillator
Baud rate: ½ to ¼ of bit rate
– Increased tolerance to CD & PMD
– Lower bandwidth electronics
90o
QPSK
DPSK
90o
DQPSK
90o
9
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
90o
Modulation Format Performance (43G)
Transmission
Format
(43-Gb/s)
Required
OSNR for
10-3 BER
[dB]
CD
Tolerance
(2-dB Pen.)
[ps/nm]
PMD
Tolerance
(1-dB Pen.)
[ps]
NRZ-OOK
15.9
52
8
50%RZ-OOK
14.4
48
10
CSRZ-OOK
14.9
42
11
Duobinary/PSBT
16.6
211
6
33%RZ-AMI
13.4
49
10
VSB-NRZ
16.4
63
6
VSB-CSRZ
14.8
51
11
NRZ-(D)PSK
11.7
74
10
50%RZ-(D)PSK
11.1
50
10
NRZ-(D)QPSK
13.2
168
20
50%RZ-(D)QPSK
12.2
161
21
Winzer and Essiambre, J. Lightwave Technol. Vol. 24, p. 4711, 2006
10
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
JDSU Viewpoint
 JDSU recognizes ODB/DPSK as preferable to address
metro and regional applications @ 40G
 JDSU recognizes RZ-DPSK or RZ-DQPSK/QPSK as
preferable to address LH and ULH applications @ 40G
 QPSK and Coherent Rx is the best pathway to 100G
applications
 JDSU is actively enabling 40G support across all segments
of AON networks
 40G will happen over 50GHz, with advanced modulation
schemes which are also more CD and PMD tolerant
11
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
International standards
Network equipment and test equipment
12
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
International Standards Related to 40/43G
 SDH
– G.707 Framing, Overhead, Mapping
– G.693 Optical Interfaces
 SONET
– Telcordia GR-253 (December 2005)
– ANSI/OPTXS T1.105 Framing, Overhead, Mapping
 OTN
– G.709 Framing, Overhead, Mapping
– G.693 Optical Interfaces
 Jitter
– O.172, G.825 for SDH
– O.173, G.8251 for OTN
13
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40/43G Testing Applications
14
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Segmentation of Tested 40/43G Devices
40/43G Testing
Line Interface – Functions – Sensor - Synchronization
Components
-switches
ROADMs
Amplifiers
15
© 2007 JDSU. All rights reserved.
Transponder
& Interfaces
Linecards &
Sub-Systems
Wavelength
Management
subsystem,
Repeaters
Network
Elements &
Systems
Transmission
Systems, Crossconnects, ADMs,
ROADM Nodes…
Line Cards
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Live
Networks
Electrical Testing on 40/43G Components
Functional testing
- Unframed/framed BERT
MOD
electrical
40/43G
optical
DEM
Modulation formats
ODB (Optical Duobinary NRZ)
= PSBT (Phase-Shaped-Binary-Transmission)
RZDPSK (RZ Differential-Phase-Shift-Keying)
QPSK (Quadrature Phase shift Keying)
CRZ (Chirped RZ)
CSRZ (Carrier-suppressed RZ)
DRZ (Duobinary RZ)
16
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40/43G Transponder Testing
Power
supply
Clock
gen.
Test board
SFI-5
MUX
Line time
SFI-5
DMX
optical
40/43G
CDR
16MHz
2.5G
Transponder
17
© 2007 JDSU. All rights reserved.
Interface testing
- Optical parameters
- Jitter Testing: Jitter
Generation/MTJ/JTF
Functional testing
- Unframed/framed BERT
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40/43G Network Element & Network Testing
client
line
NE
MUX
optical
40/43G
DMX
Interface testing
– Electrical & optical parameters
– Jitter testing
Functional testing
– BERT
– OTN Mapping/Demapping
– Connectivity test (path trace)
Sensor testing
– Alarm & Error stress
Synchronization testing
– Jitter & Wander
– Pointer
18
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
optical
43G
Jitter Applications in Telecom and Datacom
Jitter
SDH/SONET/PDH
OTN
Ethernet
BERT scan (Bathtub curve)
Generation
Network
Tolerance
DUT
Stressed eye
DUT
Transfer
19
© 2007 JDSU. All rights reserved.
not required
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Jitter Standards for 40/43G
Transfer
20
SONET
OC-768
SDH
STM-256
Telcordia
GR-253
ITU-T
G.825
20k-320M
1200 mUI
tbd
(G.8251-ODCp)
G.783 (REG A)
16M-320M
100 mUI
16M-320M
100 mUI
20k-400k
6000 mUI
tbd
16M-320M
150 mUI
40k-4M
0.1 dB
4M-320M
20dB/dec
© 2007 JDSU. All rights reserved.
Test Equipment
OTN
OTU3
ITU-T
G.8251
20k-320M
1200 mUI
16M-320M
100 mUI
20k-400k
6000 mUI
16M-320M
150 mUI
tbd
Receiver fixed error W
Tolerance
Generation
Network Equipment
SDH
STM-256
OTN
OTU3
ITU-T
O.172
ITU-T
O.173
80k-320M
150 mUI
20k-320M
200 mUI
16M-320M
50 mUI
16M-320M
50 mUI
40k-4M
0.1 dB
4M-320M
20dB/dec
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Q&A
Thank you
for your attention
[email protected]
21
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
JDSU ONT Test Solution

40G SDH/SONET
– SONET OC-768 with STS-1 Mappings
– SDH STM-256 with AU Mappings
– Alarm, Error, Pointer Generation & Analysis
– Overhead Generation & Analysis
– Overhead Capture

43G OTN
– OTN with ODU3 Mapping with SDH/SONET Client
or PRBS test signal
– Alarm, Error Generation & Analysis
– Overhead Generation & Analysis
– Overhead Sequencer & Capture
– FEC Generation & Analysis incl. Stress test
– Synchronous and Asynchronous Mapping
– Wrapper & Dewrapper Testing
40/43G Unframed
– Alarm, Error Generation & Analysis

22
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40G
optical
unframed
framed
40/43G
optical & electrical
unframed & framed
Jitter &Wander
JDSU TestPoint Test Solution
General
•
•
•
•
Bit rate coverage: 40/43G
Production line testing
Multiple ports per unit
Field upgradeable from 40G to 40G/43G
TS-30
TS-170
SDH/SONET
•
•
•
•
•
STM-256/OC-768 signal
Disruption time measurement
G.828 Performance Monitoring
Alarm, Error, Pointer Generation & Analysis
Overhead Generation & Analysis
OTN
•
•
•
23
Detailed FEC evaluation
Alarm, Error, Pointer Generation & Analysis
Overhead Generation & Analysis
© 2007 JDSU. All rights reserved.
JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
40Gbps module