Helmut Schink,
Vice Chair of SG 15
Helmut.schink@nsn.com
Pune, India, 13 – 15 December 2010

Workshops
,
Seminars,
Symposia
…
SG
WTSA
World Telecommunication
Standardization Assembly
Study Group
Telecommunication Standardization
Advisory Group
SG
IPR
Ad hoc
Working Party
Q
Q
Q
WP
Q
Q
Q
WP WP Focus
Group
Questions: Develop Recommendations
Pune, India, 13 – 15 December 2010
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General area of study is on “Optical transport networks and access network infrastructures”
SG 15 is the focal point in ITU T for the development of standards on optical and other transport network infrastructures, systems, equipment, optical fibres, and the corresponding control plane technologies to enable the evolution toward intelligent transport networks.
This encompasses the development of related standards for the customer premises, access, metropolitan and long haul sections of communication networks.
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Pune, India, 13 – 15 December 2010

Home / Access / Regional Long Haul
Optical
Access
Metallic
Access
Terrestrial &
Submarine
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Pune, India, 13 – 15 December 2010

Major projects
Lead SG on access network transport
Lead SG on optical technology
Lead SG on optical transport networks
New opportunities
Home networking
Energy management
Power saving
Home and commercial building automation transceivers
New customer premises cabling
Interoperability testing (e.g. with FTTH Council Europe)
Packet Transport
Device Management
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Chair: Yoichi Maeda, TTC
Vice-Chairs, WP Chairs:
Sadegh Abbasi Shahkooh, Iran
Baker Baker, Syria
Júlio Cesar Fonseca, Brasil
Viktor Katok, Ukraine
Francesco Montalti, WP 2, Telecom Italia
Helmut Schink, Nokia Siemens Networks
Tom Starr, WP 1, AT&T
Steve Trowbridge, WP 3, Alcatel Lucent
Shaohua Yu, China
Counsellor: Greg Jones
Pune, India, 13 – 15 December 2010
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Outside plant techniques for easy, environmentally friendly installation
Fibres: rubustness and low water peak
Higher speed and lower power consumption in home network
DSL copper access
Fiber access
Common OAM mechanisms for MPLS
Beyond 100G long haul optics
Syncronisation e.g. for backhaul
Pune, India, 13 – 15 December 2010
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►
►
►
L. 83 “Low impact minitrench installation techniques”
Installation of mini ducts structures inside a small dimension trench: width less than 5 cm and depth in the range 20-30 cm (compared with 10x30 cm of the conventional one)
Possibility of installing up to 3 linear arrays of 5 mini ducts
 10/14 mm directly buried
Use of low environmental impact trenching machines
Pune, India, 13 – 15 December 2010

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Solutions for installation of ducts and cables in an occupied infrastructures
Outfitting of existing ducts (telcos, street lighting, power..) with10/12 mm mini ducts and use of completely dielectric minicables
Separation of the telecommunication access points with the use of reduced dimensions manholes
Pune, India, 13 – 15 December 2010
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Q7/15
Work in Progress
 L.distr
“Customer and distribution boxes and terminals”
 L.drop
“Pre-terminated fibre drop cables & hardened connectors”
 L.modc
“Environmental protection of optical connectivity in devices and optical outside plant conditions”
 L.oxcon
“Outdoor optical cross connect cabinets
•Optimization of space
•Unbundling?
Need of new Recommendation on field mountable connector technologies
Pune, India, 13 – 15 December 2010
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ITU-T documents give guidance on how to use the available spectrum
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11
Pune, India, 13 – 15 December 2010

10
5.0
2.0
1.0
0.5
0.2
0.1
600
First window
“850-nm”
Rayleigh
Scattering
Second window
“1300-nm”
Third window
“1500-nm”
Water peak
1490nm
DS
1550nm m
800 1000 1200 1400
Pune, India, 13 – 15 December 2010
1600
Absorption
Standard fiber
AllWave ® Fiber
1800 l (nm)

G. 657 “Bending loss insensitive single-mode fibres”
G.657 A (G.652 compliant) A1 fibre
A2 fibre
10 mm bending radius
7.5 mm bending radius
G.657 B
G.652
(not G.652 compliant)
G.657 A1
G.657 A2 / B2
G.657 B3
B2 fibre
B3 fibre
Bending Radius
G. 657A1
G. 657A2 / B2
G. 657B3
7.5 mm bending radius
5 mm bending radius
Specified loss in dB for 1 turn at 1550 nm for radius:
10 mm 7.5 mm 5 mm
<0.75
-
<0.1
<0.03
<0.5
<0.08
-
<0.15
Following issues are being addressed as the future study points:
- possibility of A3 fibre
- splicing to G.652 fibre (level of compliance)
- wavelength dependence of the transmission characteristics
Pune, India, 13 – 15 December 2010

10/100/1000bT
A) Direct Fiber (Point to Point)
• Reach: ~20Km
• Future proof architecture
• Protocol independent
• Completely passive ODN
• Follows established telco wiring practice
• High CO/LO Fiber Management cost
• Un-economical for countrywide FTTH
1 – 10G
Cabinet /
Basement
Ethernet
Switch
B) AON (Active Optical Network)
• Reach: up to 40Km, (typ. ~7-15Km)
• Easy BW upgrades
• Flexible user & line rate deployment
• Simple deployment
• Shared Bandwidth
• Requires active equipment
• Increases OSP costs
• Increased OpEx
2.5G DS / 1.25G US
Passive
Splitter
C) G-PON G.984
• Reach: ~20Km
• Simplified Fiber management
• Low cost passive OSP (no PSU, MNS)
• Low power consumption
• Low OpEx
• Video Broadcast (DS)
• Bandwidth sharing in US and DS
• ONT must filter rogue channels
• Security (MBH port shared with FTTH subscriber?)
• Splitter attenuation limits tree size
Athermal
DWDM
Filter
D) WDM-PON
• Reach: ~20Km
• Passive ODN, symmetric BW
• Independent Lambda per subscriber
• Protocol Independent
• Reach amplification possible
• Reduced OSP costs, single fiber
• Security per line
• Easy BW upgrades
• Filters complicate OSP design
Pune, India, 13 – 15 December 2010

E) UD-WDM
• Reach: up to 100Km
• Passive OSP
• Virtual Point to Point architecture
• Lambda per subscriber / service
• Colourless design, tunable ONT
• High split (up to 1:1000)
• Any packet transport format
• Low latency and delay
• Redundancy options
Filter
(Optional)
Passive
Splitter
Lambda per subscriber
10G DS / 2.5G US
F) 10G-PON G.987
• Reach: ~60Km
• Passive OSP
• Migration from G-PON
• Split 1:64 / 1:128
• Low power
• Redundancy options
Passive
Splitter
G) CWDM+TDM-PON
• Reach: up to 60Km
• Strong service separation
• Reduced fiber count, CO consolidation possible
• CWDM filter in ODN
Pune, India, 13 – 15 December 2010

frequency band for upstream and downstream.
DSLAM
FEXT
•A vectored system sends “pilot” signals to learn the crosstalk coupling between all the lines in the cable
•Each transmitter “precodes” its signal to compensate for the FEXT from the other primary disturbing lines, thereby offsetting the effects of the crosstalk
•In April 2010 the ITU-T approved the G.993.5 standard for
VDSL2 vectoring
•VDSL2 bit-rate performance is nearly doubled by cancelling the FEXT
Pune, India, 13 – 15 December 2010

-G.hn supports home networking rates up to 1
Gb/s
-One standard for in-home coax, twisted pair, and power wires
-Support of IPTV with Multicast and full QoS
(quality of service)
-Relay-node operating enable excellent coverage throughout the premises
-Very low complexity home networking (G.9955) being developed to support Smart Grid energy management
Pune, India, 13 – 15 December 2010

ITU-T WP 1/15
Passive Optical Network access
Recommendations in Force
G.983 BPON (622 / 155 Mbps)
G.984 GPON (2.4 / 1.2 Gbps)
G.985 point-to-point EPON (100 Mbps)
G.986 point-to-point EPON (1 Gbps)
G.987 XGPON (10 / 2.5 Gbps) – SR and PMD layers
Work in progress for June 2010
G.987 XGPON (10 / 2.5 Gbps) – TC layer
G.988 Generic OMCI (PON management)
Further work
G.987 XGPON2 (10 / 10 Gbps) ?
Pune, India, 13 – 15 December 2010
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Matrix Organization and key relationships
Q3/15 Coordination, Terminology
Lead SG activities (OTNT SWP)
Circuit
Transport
Packet
Transport IEEE
802
Q9/15 Equipment, Performance
Network Protection/Restoration
Q10/15
OAM, Services
Q11/15 Interfaces
Structures & Mapping
OTN
Ethernet over
Transport
(EOT)
MEF
IETF
Q12/15
Architecture
Q13/15 Timing &
Synchronization
SDH MPLS-TP
OIF
Q14/15 Management &
Control
PDH
TMF
Q15/15 Test
Equipment
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Pune, 15 December 2010

OTN Heirarchy recently extended “at both ends” to support
40/100G services per wavelength and groom at GbE
(1000BASE-X) granularity
New Flexible ODU (ODUflex) supports future Constant bitrate (CBR) clients and arbitrarily sized packet flows

•
Two flavors of ODUflex standardized


Circuit ODUflex
•
•
Supports any possible client bit rate as a service in circuit transport networks
CBR clients use a bit-sync mapping into ODUflex (239/238xthe client rate)
Packet ODUflex
•
•
Creates variable size packet trunks
(containing GFP-F mapped packet data) for transporting packet flows using L1 switching of a LO ODU
In principle, can be of any size, but in a practical implementation it will be chosen to be multiples of the lowest tributary slot size in the network
HO ODUk ( l
)
HO ODUk ( l
)
•
Similar to VCAT (virtual concatenation), but avoids differential delay problem by constraining the entire ODUflex to be carried over the same higher order ODUk, and provides one manageable transport entity per service (while also limiting the application to ODUflex that fits within one higher order ODUk)
ODU k
ODUflex
ODUk
Circuit ODUflex
ODUflex Packet ODUflex

BROADBAND NETWORKS ULTRA-BROADBAND NETWORKS
MPLS(-TP) LSP used as transport technology
GMPLS used as LSP-TP control plane
LSP bandwidths will exceed 0.5 Gb/s
OTN ODU(flex) provides a greener UB
LSP alternative
GMPLS used as ODU control plane
Operators can route packet flows in future through sub-Lambda-LSPs and
Lambda-LSPs
Transport
Technology
Evolution
Ethernet
802.3
BW growth fewer LSPs
Ethernet
802.3
>0.5 Gb/s
HO ODUk
OTUk
10/40/100 Gb/s
ODUk
OTUk

Conclusions
Standardisation happens at the forefront of technology: just before market introduction
ITU can help leverage the knowledge of academic environment
Good reserach alone is insufficient: dissemination of results via standards increases payback
ITU-T SG 15 welcomes new ideas and new people and organisations to remain in leading position
SG 15 is happy to organize brainstorming sessions to make experts familiar with new trends: proposals are welcome
Formalities exist, but are limited. Secreteriat is there to help
Next plenary meeting: Febr. 2011 in Geneva
Pune, India, 13 – 15 December 2010
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