47pt Technology Advancements and Network Applications for ... Focus 2011... · Technology...
Transcript of 47pt Technology Advancements and Network Applications for ... Focus 2011... · Technology...
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47pt
Kent Jordan
Technology Advancements and Network Applications for Optical Burst Transport Networks
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Kent Jordan
Sr. Manager Optical Network Marketing
Huawei Technologies
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Agenda
• Optical Burst technologies� Technology viability � Potential Benefits� Scalability
• Applications� Metro to Core aggregation� PON-like data services� Next-generation intra-data center switching
Huawei Optical Networks Research
� Next-generation intra-data center switching� Low latency metro access� Content delivery
• Summary and Q&A
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Optical Burst Transport Network Viability
• Many implementations of OBS/OPS require fast, flexible optical buffers, and complicated scheduling to guarantee switching performance
• Huawei has adopted a novel approach to Optical Burst technology called Optical Burst Transport Network or OBTN which minimizes dependencies on complex optical components
WDM + OTN + Switch OPS / OBS OBTN
Number of Layers 3 1 1
Number of Transponders High Greatly reduced Greatly reduced
Huawei Optical Networks Research Page 3
Electrical XC / Switch Large Greatly reduced Greatly reduced
Photonic Components Low Requirements Very High Requirements Medium-High Requirements
Flexible Optical Buffer N/A Large / Many, FDL arrays are feasible but scalability is an issue
None
Burst Mode Transceiver N/A 10Gbps is available, scalability to 100G is challenging
Scalable to 100G+
Fast Optical Burst Selector N/A Small scale Fast optical switches are available. Larger scale fast optical switches or fast tunable optical filters on the horizon
Optical Burst Amplification N/A May be challenging for multi-wavelength signals
Simplified design, manyoptions, feasible today
Near-term Viability Deployed today Poor Good
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Layer Convergence
O/E E/O
E/O O/E
O/E E/O
ROADM
OTN XC
Switch
O/E E/O
E/O O/E
O/E E/O
ROADM
OTN XC
Switch
O/E E/O
E/O O/E
O/E E/O
ROADM
OTN XC
Switch
L0
L1
L2
• Current optical networks utilize λ-granularity switching at L0 (optical layer) and rely on L1 and L2 for aggregation / grooming / switching of sub-λ traffic
Huawei Optical Networks Research Page 4
Fast optical switch
Fast optical switch
Fast optical switch
NGWDMROADM
NGWDMROADM
NGWDMROADML0
Unified L0&L1&L2
• OBTN facilitates sub-λ burst switching and reduces costly O/E/O conversion and hidden costs due to layer transitions
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Compatibility with Current WDM/OTN Networks
• OBTN can co-exist or be co-deployed with WDM/OTN networks� Supports fixed-wavelength transmitters (FTx) and does not require fast
Tunable Tx� Works across existing line amplifiers, ROADMs, etc.
(R)OADM
WDM/OTN
WDM/OTN
Burst ADMCards can be deployed in the same physical shelf
Same physical infrastructureDifferent logical
Huawei Optical Networks Research
• OBTN may also share the same networking architecture with OTN to enable all-optical multiplexing and cross connection of ODUs
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OTN line card
OTN line card
OBTN line card
OBTN line card
same physical shelfDifferent logical networks
OCh
OTU
k
HO
OD
Uk
LO ODU
LO ODU
LO ODUTraditional
OTN OCh
OTU
OB Channel
OTU
OB Channel
OTU
OB ChannelOBTN
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OBTN Scalability
OB
TN
Lin
e R
ate
10G 40G 100G
400G
1TOBTN technology has been demonstrated at 10Gbps line
rates, and exhibits scalability to 100Gbps and beyond
OFC 2011
Huawei Optical Networks Research Page 6
OFC 2011
OB
TN
Dis
tanc
e
<50km 100km 500km
OBTN technology scales to access and metro distances, but can be applied to LH and
ULH technologies in the future
1000km+
1000km
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Access and Metro Network Applications
Metro-Access
� Facilitates high-BW access to end-users / businesses
� Long reach (100 km), wide coverage (>1000 users) via WDM+TDMA
Metro-Aggregation
� Decreases no. of transponders and network latency
�Simple upgrade to higher line rates
Metro-Core
� Supports distributed services, realizes sub-wavelength bypass
� Reduces capacity and power constraints of core routers / electrical switches
Star topology Ring topology Mesh topology
Huawei Optical Networks Research Page 7
BRAS/BAS/
MSE/BNG RouterMSAN
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Metro Aggregation and Access Applications
3 4 2 4
23 4 4
4 3 3 1
3 4 43 34 1
4 1
MUX/DEMUX
OA
Central Office
Splitter
2 2
1 11 2 1 2
12
3 3
1 2 3 3
OA
TDMA
WDM
Metro Ring Aggregation PON-like Access for Business Services
Node 1
Node 2
Node 3
Node 4
Huawei Optical Networks Research
• Optical burst ring with multi-granularity flexible bandwidth provisioning and dynamic bandwidth allocation
� Supports sub-λ and λ granularity services� Supports multiple service types
� Ethernet / IP� Video services� TDM
� Compatible with current WDM systems� Supports Dynamic Bandwidth Allocation
(DBA)
• WDM+TDMA metro-access architecture utilizing relatively mature devices and PON control schemes
• Suitable for PON-like business services� Supports >1000 users (e.g. 32 λ x 32
split ratio) with up to 100km reach without O/E/O
� Improves upstream bandwidth vs. traditional PON architectures
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Next-Generation Data Center Intra -networking
• Typical data center network architecture utilizes a tree structure
• There is a significant amount of
• By applying OBTN, transmission and (distributed) switching are realized at TORs, and EORs
TOR(Top of Rack)
EOR(End of Row)
TOR
EOR
Huawei Optical Networks Research
• There is a significant amount of traffic between TORs (~ 80% of traffic, large packet flows)
• Traffic between TORs is switched via EORs � Requires many line cards & switch cards
realized at TORs, and EORs can be saved
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TC
TC
TC
LC
SC
LC
TC
TC
TC
LC
SC
LC
TC
TC
TC
LC
SC
LC
TC
TC
TC
LC
SC
LC
LC
LC
LC
LC
LC
SC
SC
SC
SC
SC
SC
SC
SC
SC
SC
LC
LC
LC
LC
LC
XC
XC
XC
XC
LC: line cardTC: tributary (server access) cardSC: switch cardXC: OBTN all-optical switch card
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Low Latency Metro Services
• Amazon: Every 100ms of latency costs 1% in sales • Google and Bing: Slow page loads can significantly affect usage, especially
delays >400-500ms (Velocity 2009 O’Reilly conference)
• Financial (High Frequency Trading): “If a broker’s electronic trading platform is 5 ms behind the competition it could lose them at least 1% of their flow” and “10ms of latency could result in a 10% drop in revenues” (TABB Group 2008)
Electrical
Huawei Optical Networks Research
• OBTN is an all-optical technology which drastically reduces delay associated with Electrical switching and processing� Reduces layer transitions and associated delay� Scalable to higher bit-rates
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Electrical latency
Optical latency
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Content Delivery / Video Distribution
Regional distribution
Metro / accessdistribution
Movie production
house
Sporting event
Editing, post-production
Nationaldistribution
Huawei Optical Networks Research
• Content delivery and Video distribution� Transport vs. Cache – OBTN can reduce video transport and distribution cost� Video distribution and delivery of master digital file from movie house or
sporting events to editing / post-production and content providers� Accommodates short term peak demand on CDN networks such as re-
watching a previous sporting event game when a team makes it to the Super Bowl or World Cup finals
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Movie theater
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Key Technology Benefits
WDM networks OBTN
~N2 transpondersFixed bandwidth
~N transpondersStatistical mux. OBTNCurrent networks
• Reduce transponders; offers dynamic bandwidth utilization� O/E/O not required at intermediate nodes� Better bandwidth utilization through DBA
• Shift L1/L2 XC functions to L0� Optical-layer enables switching bypass
and provides aggregation functions� Layer convergence provides power
consumption savings
Huawei Optical Networks Research Page 12
10G
40G
100G
OBTN XC
OA Band
filter
Band
filterTFF
OBTN Line Board
WDM Line Board
P-to-P WDM
F-OADM
ROADM
OBS OPS
OBTN
• Upgradeable and co-exists with today’s WDM networks� Optical-layer switch independent of
modulation format and line rate� OBTN ring compatible with WDM/OTN
• Viable for near-term development� OBTN does not require optical buffers or
memory � A pragmatic evolution towards all-optical
router / all-optical networking
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Summary
• Optical Burst Switching technologies are becoming more viable� Novel approaches to implementation can alleviate the dependencies on
advanced optical components, such as the Holy Grail of optical networking –the optical buffer
• These technologies have the potential to greatly reduce transport costs via layer convergence and elimination of costly O/E/O and electrical processing at various layers
• There appear to be a variety of applications for this technology
Huawei Optical Networks Research
• There appear to be a variety of applications for this technology� Metro aggregation, Intra-data center connectivity, PON-like high bandwidth
business services, Video and content distribution
• Huawei believes OBTN is viable in the near-term and as scalability requirements are satisfied, it can scale to higher speed line-rates and to distances beyond the metro area network
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Thank YouHuawei Technologies