Scalable Advanced Ring Dense Access Network Architecture
description
Transcript of Scalable Advanced Ring Dense Access Network Architecture
Scalable Advanced Ring Dense Access Network
Architecture
Prof. António TeixeiraInstituto de Telecomunicações
Aveiro, Portugal
..2 www.ict-sardana.eu [email protected]
Presentation Overview
• Motivation: FTTH research,… towards NG-PON
• SARDANA Architecture
• Fundamental goals of SARDANA
• Approach, subsystems and enabling technologies
• Conclusions, challenges and further research
• Final outcomes
• Project organization
..3 www.ict-sardana.eu [email protected]
FTTH research: motivation• Evolution after G/E-PON ?
• Towards Access-Metro convergence
• Assure the future full usability of infrastructure
– Dark fibre available,… in limited number
– Fibre exhaust urban areas
– Smooth migration
Bit
rate
s
LAN
10 Mb
100 Mb
1 Gb
10 Gb
1 Mb1m 10m 100m 1Km 10Km 100Km 1000Km
VSR OPTICALACCESS
METRO
OTN
100 Gb
LAN
10 Mb
100 Mb
1 Gb
10 Gb
1 Mb1m 10m 100m 1Km 10Km 100Km 1000Km
VSR OPTICALACCESS
METRO
OTN
100 Gb
Inte
rfac
e nu
mbe
r
LAN10
100
1,000
10,000
11m 10m 100m 1Km 10Km 100Km 1000Km
VSR
OPTICALACCESS
METRO OTNLAN
10
100
1,000
10,000
11m 10m 100m 1Km 10Km 100Km 1000Km
VSR
OPTICALACCESS
METRO OTN
• Investment and risk deferring– unpredicted growth after G/E-PONs
– unpredicted take rates, geographically & temporally
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Impact on infrastructure
Current solutions Fully passive ngPON
- Congestion in urban areas
- Complex environmental
conditions for Street Cabinets
+ Reduced impact
+ Simpler
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SARDANA Architecture
• SCALABLE & CASCADABLE -> Smooth migration & flexible growth• High user-density (>1000 users/2 fibers)• 100Mbit/s (min granted), 10Gbit/s (max)… per User.
• Long reach (100km) with Protection & Traffic Balancing by central ring
• Single-fiber colourless access
• Fully PASSIVE fiber plant
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Fundamental goals• Maximize:
– N. served users (>1000 per fibre ring)– Served area (100Km)– Served capacity (10Gbit/s x 32)
• Minimize:– Infrastructure COST
• N. Fibres / cables• N. Cabinets• N. Active areas• Civil work investments
• Musts:– Passive external plant– Single fibre access– Scalability and upgradeability– Compatibility with g/e-PON MAC– Robustness:
• Protection • Monitoring and electronic compensation
UNLIMITED PON
SARDANA ONT
SARDANA CO
Standard
10G-GPON
OLT
Optical
Interface
SARDANA
PON
Standard
10G-PON
ONTSERVICE
PLATFORM
MUX
&
PUMP
&
ROUT.
&
MONIT.
Standard
10G-GPON
OLT
Optical
Interface
Standard
xPON
OLT
Optical
Interface
refl.optical
Interface
CONTROL (control&management, monitoring, compensation)
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SARDANA targets• SARDANA project targets the extension of the limits of PONs,
– Scalability is reached by means of the new adoption of remotely-pumped amplification, a WDM/TDM overlay and cascadable remote nodes in a new hybrid architecture; it allows smoother growth and migration while keeping the passiveness of the PON and reducing civil work investments.
– The resulting network is able to serve more than 1000 and 4000 users with symmetric several hundred Mbit/s per user, spread along distances up to 100 km, up to 10Gbit/s.
– Robustness is achieved by means of passive central-ring protection and new monitoring and electronic compensation strategies over the PON, intelligently supervising and controlling the impairments that are present or can be present in a 10Gbit/s extended PON.
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SARDANA equipment general scheme
1. Separate: standard GPON (MAC) + SARDANA
2. Integrated functionality: adapted GPON + SARDANA
SARDANA ONT
SARDANA CO
Standard
10G-GPON
OLT
Optical
Interface
SARDANA
PON
Standard
10G-PON
ONTSERVICE
PLATFORM
MUX
&
PUMP
&
ROUT.
&
MONIT.
Standard
10G-GPON
OLT
Optical
Interface
Standard
xPON
OLT
Optical
Interface
refl.optical
Interface
CONTROL (control&management, monitoring, compensation)
..9 www.ict-sardana.eu [email protected]
CO
RN1 RN2
RNi
RNj
RNN RNN-1
ONU ONU
ONU ONU
1:K
ONU ONU
ONU ONU
1:K
ONU ONU
1:K
ONU ONU
ONU ONU
1:K RSOA
ONU
D m+1,…, D
2N
WDM RING
TDM TREE
D1,…, D
m
Downstream Signals
Upstream Signals
U 1,…, U
m
U m+1,…, U
2N
Bidirectional Transmission
Approach and basic modules
• WDM ring: Resilience• (up to 1.2Tbit/s)
• TDM trees
• Passive Remote Nodes (RN):
– Cascadable Add&Drop– 2-to-1 fibre interface– Remotely pumped (from
CO) optical amplification by EDFs
– Athermal splitters and fixed filters
• CO (OLT):– Centralizes the light generation and control– Stack of lasers serving TDM trees– Standard G/E-PON equipment adapted to
SARDANA
• Simple colourless ONU:
– In line with techno-economical guidelines
..10 www.ict-sardana.eu [email protected]
How does SARDANA work?• The CO sends WDM signals to
the Remote Nodes (RN)
• Each RN drops all channels
• Signals pass a 50/50 splitter for resilience (signal can be dropped form each direction, and upstream signal is transmitted in both directions)
• 50/50 provides signals to 2 TDM trees at 2 different channels
• Assigned channels are selected by filters
• Signals are amplified by EDFs (the Remote Node receives the Pumping Power for the EDFs remotely, from the WDM ring)
• The amplified signals are transmitted to the ONUs
RNi
Pump
WDM
λUi1, λD
i1λUi2, λD
i2
WDM
Pump
1:162km
1kmm1km
1:16
2km 50/5050/50
RN1CO
RNn
rEDFs
Let’s follow the blue signal for RN i
Add/Drop
X/Y X/Y
50/50
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30
35
40
45
50
0 2 4 6 8 10
Number of Remote Nodes
Link
loss
es (d
B)
pass th 0.95pass th 0.9pass th 0.8
Remote Node design v1.5• Cost effective Remote Node
– Transparent WDM Ring
– Add/Drop X/Y: 90% Pass/10% Drop
CO
RN1 RN2
RNi
RNj
RNN RNN-1
ONU ONU
ONU ONU
1:K
ONU ONU
ONU ONU
1:K
ONU ONU
1:K
ONU ONU
ONU ONU
1:K RSOA
ONU
D m+1,…, D
2N
WDM RING
TDM TREE
D1,…, D
m
Downstream Signals
Upstream Signals
U 1,…, U
m
U m+1,…, U
2N
Bidirectional Transmission
• 50/50 splitter for:– Resilience– Traffic Balancing
• Double Ring to avoid RB in Bidirectional Single-Wavelength Single-Fiber Transmission
CO
RNN RN1
RN i
ONU ONU
1:32
ONU ONU
Pump Pump WDM WDM
1:32
ONU ONU
ONU ONU
Add/Drop
rEDFs rEDFs
Pump
U i1, D
i1 U i2, D
i2
X/Y X/Y
50/50
Downstream Signals
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Remote Node design… evolution
• Passive Remote Nodes (RN): Cascable, Remotely pumped (from CO),…
Pass band filters
90/10 90/10
RN i 50/50
i1 i2
1:K 1:K
EDFs
OFC 2006, JThB78 MZM - ECOC 2006, We3P169RSOA - OFC 2007, OTuG2
v1): Tunable lasers at ONU– Single fiber Ring
– Add&Drop by splitters
X/Y: 90% Pass/10% Drop (10dB drop loss)
WDM WDM Pass band filter
90/10
RN i
EDFs
90/10 90/10 90/10
1:K
ED
Fs
50/50
1:K/2
1:K/2
50/50
i2 i2 i1 i1
CO
RN1 RN2
RNi
RNj
RNN RNN-1
ONU ONU
ONU ONU
1:K
ONU ONU
ONU ONU
1:K
ONU ONU
1:K
ONU ONU
ONU ONU
1:K RSOA
ONU
D m+1,…, D
2N
WDM RING
TDM TREE
D1,…, D
m
Downstream Signals
Upstream Signals
U 1,…, U
m
U m+1,…, U
2N
Bidirectional Transmission
v1.5): Colorless ONU (MZM & RSOA)– Double fiber Ring to avoid
Rayleigh at ring and EDFs
– More EDFs… more pump power required
..13 www.ict-sardana.eu [email protected]
Remote Node design… evolution
CO
RN1 RN2
RNi
RNj
RNN RNN-1
ONU ONU
ONU ONU
1:K
ONU ONU
ONU ONU
1:K
ONU ONU
1:K
ONU ONU
ONU ONU
1:K RSOA
ONU
D m+1,…, D
2N
WDM RING
TDM TREE
D1,…, D
m
Downstream Signals
Upstream Signals
U 1,…, U
m
U m+1,…, U
2N
Bidirectional Transmission
• Passive Remote Nodes (RN):
– Cascadable Add&Drop
– 2-to-1 fibre interface
1:K RN i
Signals
i1
50/50
1:K/2
1:K/2
i2
50/50
i1&2
ECOC 2007, We6.4.3
v2): Add&Drop by filters, transparent for other wavelengths.
– Scalability maintained
– Drop IL reduce from 10.2dB to 0.7dB
– Thermal Drift <1.2pm/ºC
– 10dB power budget gained
– Remotely pumped (from CO) optical amplification by EDFs
– Athermal splitters and fixed filters
– 50/50 splitter for: resilience and Traffic Balancing
..14 www.ict-sardana.eu [email protected]
Set-Up description… & update
• CO: Laser, MZM, Pump Laser• ONU: Reflective SOA + Detector
1:16
RN i
Pump WDMs
Signals
i1&2
Pump
EDFs
2:2
50/50
X / 100-X
1:16
i1
50/50
Pump WDMs
Pump
EDFs
50/50
2:2
1:16
1:16
2km i2
100GHz
50GHz
Pump
1km
50/50
RSOA ONU
90
/10
CO Downstream Fibre
Upstream Fibre
Optical Switch
Pump Lasers
MZM
Tunable Laser
Optical Switch
RN16 RN1
25km 25km
25km 25km
Att
25km 25km 25km
25km
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Colorless ONUs• Colorless ONU for Low-cost access network
– ONU represents about 80% of network cost* (excluding P2P)
– Colorless ONU for decreasing:• Costs of operation, administration, maintenance functions• Price by mass production of just one ONU specification
• Reflective for operating in a single-fiber to the user
• Technologies: – Reflective SOA,... – Potentially low cost Tunable Lasers,…
*: R.I. Martinez et al, “A Low Cost Migration Path Towards Next Generation Fiber-To-The-Home Networks”, ONDM 2007, LNCS 4534, pp 86-95 (2007)
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Conclusions & Further research• Basic feasibility shown by transmission measurements:
– Highly Flexible and Scalable Network Architecture
– High user-density (>1000) & Long reach (100 km) in worse case, checking resilience capability at 1G by 10dB power budget improvement
– Single-fiber access & Fully PASSIVE fiber plant
– Using RSOA-ONU as a cost-effective implementation
– High Bandwidth per user by means of 10Gbps/2.5Gbps half-duplex system
• A lot to do…– Gain stabilization of remote EDFs, pump power reduction…
– Increase robustness by electronic compensation strategies and intelligent monitoring and controlling of impairments
– Full demonstrator building, MAC implementation & Field trial
– … to be done in the next step…
..17 www.ict-sardana.eu [email protected]
Final Outcomes
• SARDANA project targets the ultimate extension of the limits of FTTH Passive Optival Networks, as a practical transparent approach to access&metro convergence.– Sardana Test-bed Demonstration in Espoo-Finland, with extended scalable
reach, number of homes, bandwidth, passively scalable external plant and resiliency.
– Sardana Field-Trial in 2010 in Lannion-France, with new broadband services. – Network/system/subsystem/component design guidelines.
• Contribution to Regulatory Bodies on Broadband Access to citizens (multi-operator infrastructure sharing strategy).
• Contribution to international Standards on next-generation FTTH.
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Grant agreement no.: 217122 (STREP), Call: FP7-ICT-2007-1 , Activity: ICT-1-1.1 - Network of the Future
Josep Prat (project manager), [email protected]. Participant name Short name Country
1 Universitat Politecnica de Catalunya UPC Spain
2 France Telecom / Orange FT France
3 Tellabs TLB Finland
4 Intracom S.A. Telecom Solutions IntraCOM Greece
5 Instituto de Telecomumicações IT Portugal
6 High Institute of Communication and Information Technology ISCOM Italy
7 Research and Education Laboratory in Information Tech. AIT Greece
From Jan 2008: FP7 SARDANA STREP project
Scalable
Advanced
Ring-based passive
Dense
Access
Network
Architecture
..19 www.ict-sardana.eu [email protected]
SARDANA project organization
The Work-Plan of SARDANA is organized in several Work-Packages (WP) with definite interrelationships.
1. WP-Mg: Project Management and Outcomes.
2. WP-Ar: Network Architecture
3. WP-Mc: MAC and Higher Layers
4. WP-Tr: Transmission and modulation formats
5. WP-Sy: Network Subsystems
6. WP-Im: Monitoring and adaptive compensation of PON Impairments
7. WP-Dm: Demonstrator and Field-trial
Josep Prat1, Jose A. Lázaro1, Philipe Chanclou2, Giorgio M. Tosi Beleffi3, Antonio Teixeira4, Ioannis Tomkos5, Risto Soila6, Vassilis Koratzinos7
1: Universitat Politècnica de Catalunya (UPC), Barcelona, (Spain)2: France Telecom R&D Réseaux d'Accès (RESA), France3: ISCOM, Italian Communication Ministry, Optical Comm. & Devices, Rome (Italy)4: Instituto de Telecomunicações (IT), Aveiro 3810-193, (Portugal)5: Research and Education Laboratory in Information Technologies, Athens, (Greece)6: Tellabs Oy, Espoo, (Finland)7: Intracom S. A Telecom Solutions, Athens (Greece)
Thank you!Thank you!