Transcript International Telecommunication Union

ITU-T Kaleidoscope 2010
Beyond the Internet? - Innovations for
future networks and services
Trends in Transport Standards
Helmut Schink,
Vice Chair of SG 15
[email protected]
Pune, India, 13 – 15 December 2010
ITU-T Structure
Workshops
,
Seminars,
Symposia
…
WTSA
World Telecommunication
Standardization Assembly
Telecommunication Standardization
Advisory Group
SG
Working Party
Q
QQ
Study Group
WP
WP
Q
WP
IPR
Ad
hoc
SG
Focus
Group
Questions: Develop Recommendations
QQ
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Pune, India, 13 – 15 December 2010
Study Group 15: Overview
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
Study Group 15: Overview
Home / Access
/ Regional
Long Haul
Optical
Access
Metallic
Access
Terrestrial &
Submarine
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Pune, India, 13 – 15 December 2010
Projects and Opportunities SG 15
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
Lisbon,India,
Portugal,
2010
Pune,
13 24-25
– 15 February
December
2010
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SG 15 Management
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
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Pune, India, 13 – 15 December 2010
Major front lines
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
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Pune, India, 13 – 15 December 2010
L. 83 “Low impact minitrench installation
techniques”
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►
►
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
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
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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
devices and optical
connectivity in
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
Attenuation (dB/km)
Fiber Spectrum
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Third window
Second window
“1500-nm”
“1300-nm”
Water peak
First window
“850-nm”
5.0
Rayleigh
Scattering
2.0
1490nm1550nm
1580n
m
1310nm
1270nm
DS V
DS
US
US
Absorption
Standard fiber
1.0
0.5
AllWave® Fiber
0.2
0.1
600
800
1000
1200
1400
1600
1800
l (nm)
10G-PON
GPON
(D)WDM
PON
Pune, India, 13 – 15 December 2010
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 (not G.652 compliant)
B2 fibre
B3 fibre
7.5 mm bending radius
5 mm bending radius
Specified loss in dB for 1 turn at 1550 nm for
radius:
G.652
G.657 A1
G.657 A2 / B2
G.657 B3
Bending Radius
10 mm
7.5 mm
5 mm
G. 657A1
<0.75
-
-
G. 657A2 / B2
<0.1
<0.5
-
G. 657B3
<0.03
<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
Available Fiber Access Technologies
Cabinet /
Basement
10/100/1000bT
1 – 10G
Ethernet
Switch
A) Direct Fiber (Point to Point)
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•
•
•
•
•
•
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
B) AON (Active Optical Network)
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•
•
•
•
•
•
•
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
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•
•
•
•
•
•
•
•
•
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
D) WDM-PON
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•
•
•
•
•
•
•
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Athermal
DWDM
Filter
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
Other/future
Fiber Access Technologies
E) UD-WDM
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•
•
•
•
•
•
•
•
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
Lambda per subscriber
Filter
(Optional)
Passive
Splitter
10G DS / 2.5G US
Passive
Splitter
F) 10G-PON G.987
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•
•
•
•
•
Reach: ~60Km
Passive OSP
Migration from G-PON
Split 1:64 / 1:128
Low power
Redundancy options
G) CWDM+TDM-PON
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•
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Reach: up to 60Km
Strong service separation
Reduced fiber count, CO consolidation possible
CWDM filter in ODN
Pune, India, 13 – 15 December 2010
Vectored VDSL2 enables up to 100
Far-end crosstalk (FEXT) greatly reduces VDSL2 performance.
Near-end crosstalk is not problem
since VDSL2 uses different
Mb/s
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
Unified Home Networking
Standards
-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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WP3/15 - Transport Network Structure
Matrix Organization and key relationships
Q3/15
Coordination, Terminology
Lead SG activities (OTNT SWP)
Q9/15
Equipment, Performance
Network Protection/Restoration
Q10/15
OAM, Services
Q11/15
Interfaces
Structures & Mapping
Q12/15
Architecture
Q13/15
Timing &
Synchronization
Q14/15
Management &
Control
Q15/15
Test
Equipment
Circuit
Transport
Packet
Transport
OTN
Ethernet
over
Transport
IEEE
802
MEF
(EOT)
IETF
SDH
PDH
MPLS-TP
OIF
TMF
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Pune, 15 December 2010
Optical Transport Network (OTN)
Evolution
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
ODUflex
•
Two flavors of ODUflex standardized

Circuit ODUflex
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•

n FC PHY
ODUflex n
HO ODUk (l)
N Eth PHY
ODUflex m
TDM CBR
ODUj (not flex)
Packet ODUflex
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•
•
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)
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
Logical Flow
(VLAN #1)
ODUflex 1
Logical flow
(VLAN #n)
ODUflex n
N Eth PHY
HO ODUk (l)
Eth PHY
ODUflex m
TDM CBR
ODUj (not flex)
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
ODUk
ODUflex
Circuit ODUflex
ODUflex
Packet ODUflex
Transport Technology to suit
any required granularity
OTN ODU(flex) provides a greener UB
LSP alternative
GMPLS used as LSP-TP control plane
GMPLS used as ODU control plane
LSP bandwidths will exceed 0.5 Gb/s
Operators can route packet flows in
future through sub-Lambda-LSPs and
Lambda-LSPs
>0.5 Gb/s
EC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
traffi
c
LSP
LSP
LSP
LSP
LSP
LSP
LSP
LSP
BW growth
fewer LSPs
EC/PW/IP
EVC/PW/IP ODUflex
EVC/PW/IP ODUflex
EVC/PW/IP
EVC/PW/IP ODU
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
EVC/PW/IP
Transport
Technology
Evolution
traffic
MPLS(-TP) LSP used as transport
technology
traffic
ULTRA-BROADBAND NETWORKS
traffic
BROADBAND NETWORKS
10/40/100 Gb/s
ODUk
HO ODUk
Ethernet
802.3
Ethernet
802.3
OTUk
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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