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Pune, India, 13 – 15 December 2010
ITU-T Kaleidoscope 2010Beyond the Internet? - Innovations for
future networks and services
Helmut Schink,Vice Chair of SG 15
Trends in Transport Standards
2Pune, India, 13 – 15 December 2010
ITU-T Structure
Telecommunication Standardization Advisory Group
Telecommunication Standardization Advisory Group
WTSA World TelecommunicationStandardization Assembly
Study GroupStudy Group SGSG
Workshops,
Seminars,Symposia
…
IPR Ad hoc
Working Party
Questions: Develop Recommendations
SGSG
WP WP WP
Q Q Q
Q Q Q
Focus Group
3Pune, 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.
4Pune, India, 13 – 15 December 2010
Optical Access
Metallic Access
Home / Access Long Haul
Terrestrial & Submarine
/ Regional
Study Group 15: Overview
5Lisbon, Portugal, 24-25 February 2010
Projects and Opportunities SG 15
Major projectsLead SG on access network transportLead SG on optical technologyLead SG on optical transport networks
New opportunitiesHome networkingEnergy managementPower savingHome and commercial building automation transceiversNew customer premises cablingInteroperability testing (e.g. with FTTH Council Europe)Packet TransportDevice Management
Pune, India, 13 – 15 December 2010
6Pune, India, 13 – 15 December 2010
SG 15 Management
Chair: Yoichi Maeda, TTCVice-Chairs, WP Chairs:
Sadegh Abbasi Shahkooh, IranBaker Baker, SyriaJúlio Cesar Fonseca, BrasilViktor Katok, UkraineFrancesco Montalti, WP 2, Telecom ItaliaHelmut Schink, Nokia Siemens NetworksTom Starr, WP 1, AT&TSteve Trowbridge, WP 3, Alcatel LucentShaohua Yu, China
Counsellor: Greg Jones
Major front lines
Outside plant techniques for easy, environmentally friendly installationFibres: rubustness and low water peakHigher speed and lower power consumption in
home networkDSL copper accessFiber access
Common OAM mechanisms for MPLSBeyond 100G long haul opticsSyncronisation e.g. for backhaul
7Pune, India, 13 – 15 December 2010
L. 83 “Low impact minitrench installation L. 83 “Low impact minitrench installation techniques”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
9
9 Pune, India, 13 – 15 December 2010
Solutions for installation of ducts and cables inSolutions for installation of ducts and cables inan occupied infrastructuresan 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
10
Q7/15 Q7/15 Work in ProgressWork 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
Need of new Recommendation on field mountable connector technologies
•Optimization of space•Unbundling?
Pune, India, 13 – 15 December 2010
11Pune, India, 13 – 15 December 2010
11
ITU-T documents give guidance on how to use the available spectrum
Third window“1500-nm”Second window
“1300-nm”First window“850-nm”
Fiber Spectrum
600
0.1
(nm)
0.2
0.5
1.0
2.0
5.0
10
Att
enuati
on (
dB
/km
)
800 1000 1200 1400 1600 1800
Standard fiber
AllWave® Fiber
US1310nm
DS1490nm
V1550nm
US1270nm
DS1580nm
GPON10G-PON
(D)WDM PON
Water peak
RayleighScattering
Absorption
Pune, India, 13 – 15 December 2010
G. 657 “Bending loss insensitive single-mode fibres”G. 657 “Bending loss insensitive single-mode fibres”
G.657 A (G.652 compliant) A1 fibre 10 mm bending radiusA2 fibre 7.5 mm bending radius
G.657 B (not G.652 compliant) B2 fibre 7.5 mm bending radiusB3 fibre 5 mm bending radius
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
G.652G.657 A1G.657 A2 / B2
G.657 B3
Specified loss in dB for 1 turn at 1550 nm for radius:
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
Pune, India, 13 – 15 December 2010
Available Fiber Access Technologies
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
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
Cabinet /Basement
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
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
10/100/1000bT 1 – 10G
Athermal DWDMFilter
Passive Splitter
EthernetSwitch
Pune, India, 13 – 15 December 2010
Other/future Fiber Access Technologies
F) 10G-PON G.987• Reach: ~60Km• Passive OSP• Migration from G-PON• Split 1:64 / 1:128• Low power• Redundancy options
10G DS / 2.5G US
Lambda per subscriber
Filter(Optional)
Passive Splitter
Passive Splitter
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
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
Vectored VDSL2 enables up to 100 Mb/s
Far-end crosstalk (FEXT) greatly reduces VDSL2 performance. Near-end crosstalk is not problem since VDSL2 uses different frequency band for upstream and downstream.
DSLAM
•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
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
18Pune, India, 13 – 15 December 2010
ITU-T WP 1/15ITU-T WP 1/15Passive Optical Network accessPassive Optical Network access
Recommendations in ForceG.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 2010G.987 XGPON (10 / 2.5 Gbps) – TC layerG.988 Generic OMCI (PON management)
Further workG.987 XGPON2 (10 / 10 Gbps) ?
WP3/15 - Transport Network StructureMatrix Organization and key relationships
19Pune, 15 December 2010
Q3/15 Coordination, TerminologyLead SG activities (OTNT SWP)
Q9/15 Equipment, PerformanceNetwork Protection/Restoration
Q10/15 OAM, Services
Q11/15 InterfacesStructures & Mapping
Q12/15 Architecture
Q13/15 Timing &Synchronization
Q14/15 Management &Control
Q15/15 TestEquipment
CircuitTransport
PacketTransport
OTN
SDH
PDH
Ethernetover
Transport(EOT)
MPLS-TP
IEEE802
MEF
IETF
OIF
TMF
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) granularityNew Flexible ODU (ODUflex) supports future Constant bit-rate (CBR) clients and arbitrarily sized packet flows
ODUflex• 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
• 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)
HO ODUk ()
ODUj (not flex)
ODUflex nn FC PHY
ODUflex mN Eth PHY
TDM CBR
HO ODUk ()
ODUj (not flex)
ODUflex nn FC PHY
ODUflex mN Eth PHY
TDM CBR
HO ODUk ()
ODUflex 1
ODUflex m
ODUj (not flex)
Logical Flow(VLAN #1)
Eth PHY
ODUflex nLogical flow(VLAN #n)
N Eth PHY
TDM CBR
HO ODUk ()
ODUflex 1
ODUflex m
ODUj (not flex)
Logical Flow(VLAN #1)
Eth PHY
ODUflex nLogical flow(VLAN #n)
N Eth PHY
TDM CBR
ODU k
ODUflex
ODUk
Circuit ODUflex
ODUflex Packet ODUflex
BROADBAND NETWORKS
MPLS(-TP) LSP used as transport technology
GMPLS used as LSP-TP control plane
LSP bandwidths will exceed 0.5 Gb/s
Transport Technology to suitany required granularity
Ethernet802.3
LSP
LSP
LSP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
>0.5 Gb/s
tra
ffic
Ethernet802.3
LS
P
LS
P LS
PE
VC
/PW
/IPE
VC
/PW
/IP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
LS
PLS
PE
VC
/PW
/IPE
VC
/PW
/IPE
VC
/PW
/IPE
VC
/PW
/IP
BW growthfewer LSPs
tra
ffi
c
ULTRA-BROADBAND NETWORKS
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
ULTRA-BROADBAND NETWORKS
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
OTUkOTUk
HO ODUk
OD
Ufle
x
OD
U O
DU
flex
EC
/PW
/IPE
VC
/PW
/IP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
ODUk
EC
/PW
/IPE
VC
/PW
/IP
EV
C/P
W/IP
EV
C/P
W/IP
EV
C/P
W/IP
10/40/100 Gb/s
tra
ffic
tra
ffic
TransportTechnologyEvolution
23Pune, India, 13 – 15 December 2010
ConclusionsConclusions
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