CAON Standardization
Activities
Juan Fernandez-Palacios Telefonica I+D. CAON co-chair
Telefónica
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I+D
Key standardization fora
FSAN: Optical access standardization (i.e NGPON2)
IETF: Control plane standardization
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FSAN Task Force
CAON contributions at FSAN are being centralized by Thomas Pfeiffer
(ALU)
Key issues
OFDM
based NGPON2 solutions are still in an early stage for
standardization
Still, in terms of expected total system costs it cannot compete with
conventional TDM/WDM-based PON solutions taking into account
the current state of component technologies
A solid recommendation to FSAN to choose OFDM technology for
NGPON2 solutions can not be done yet
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IETF Standardization Task Force
Lots of potential sinergies and collaboration activities within IETF
Technologies
Intra-carrier
Single Domain
Packet Switching (IP,
MPLS-TP, etc)
Inter-carrier
Multidomain
STRONGEST (PCE, MPLS-TP OAM)
ONE , CHRON
Wavelength Switching
GEYSERS
Sub-wavelength
Switching
IT and network
integration (Cross
Stratum)
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MAINS
(CCAMP, PCE, MPLS-TP OAM)
GEYSERS (CSO)c
ETICS
(PCE, CCAMP,
PCN, CDNI, …),
Innovation challenges in core networks
E2EMPLS – gluing segments to simplify operation and provisioning
End to End
MPLS network
IP/MPLS core
MAN
IP Network
Separated provisioning and OAM in different segments
(IP & Aggregation). End-to-end MPLS solutions to
lower OPEX
MAN
Multilayer coordination
Resource optimization through multilayer planning.
OPEX savings from coordinated planes.
Multilayer Coordination
to optimize resources
Photonic Control Plane
Photonic Control Plane GMPLS + PCE
ROADM
Allowing cost efficient Multivendor network
Multi-vendor interoperability
Algorithms for Efficient use of available resources
Fiber link
Cost efficient high speed transmission up to 1 TbpsFlexible Grid. Pure optical subwavelength switching.
ROADM
Cost Efficient
Photonic Transport
Network
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Photonic Transport Transmission
ROADM
ROADM
Flexible Grid
100 Gbps+
Variable rate
transponder
Multilayer Interworking
Current core networks are based on several layers.
Mid-term scenario: IP/MPLS network over reconfigurable
wavelength
switched optical network (WSON).
Three key elements to help in the management and coordination of
such multi-layer architectures:
• User to Network Interface (UNI)
• Path Computation Element (PCE)
• Virtual Network Topology Manager (VNTM).
UNI standard method to allow resource request between layers acting
as server and client
PCE aim is to calculate the route between endpoints, especially in
complex scenarios
VNTM is in charge of maintaining the topology of the upper layer by
connections in the lower layer.
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Multi-Domain Interworking: H-PCE
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Flexgrid Control Plane
• ITU-T SG-15 is extending the standard G.694.1 to include the concept of
flexible grid
› Goal:
allow an efficient and flexible allocation and configuration of
spectral bandwidth for high bit-rate systems.
optical
• Currenlty
ITU-T is extending the architecture of the optical transport
networks (G.782) to add the flexi-grid layer (also referred to as the media
layer) as the server layer of the optical channels.
• IETF is starting to look at the definition of the GMPLS based control of the
flexible grid networks
› Several frameworks and solutions from different companies were presented
› In the 84th IETF meeting in Vancouver, the Framework for GMPLS based
control of Flexi-grid DWDM networks joining for the first time all the efforts of the
industry, led by FP7 STRONGEST partners (Telefonica and CTTC), draftogrcetal-ccamp-flexi-grid-fwk-00 was presented.
›
All the control plane extensions (signalling, routing, path computation) need to
be done… still a lot of work ahead…
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ITU-T Terminology for Sub-Lambda
Photonically Switched Network (SLPSN)
 SLPSN definition: SLPSN is a switching technology which handles, at the data
plane level and in a photonic way, temporal slices of individual or multiple
wavelengths. SLPSN incorporates the optical time domain in addition to the
wavelength/frequency and space domains.
 SLPSU definition: a sub-lambda photonic switching unit (SLPSU) is an optically
sliced unit of a wavelength in time domain, such as an optical time slot, an optical
burst, or an optical packet.
Application layer
Application
Server(s)
Application
Client/Server
MAINS NSI
(MNSI)
MAINS NSI
(MNSI)
MAINS
E-NNI
Standard
GMPLS CP
MAINS GMPLS CP
XML i/f
Access
OPST
Ring
MAINS GMPLS CP
XML i/f
OBST
Mesh
Metro/regional segment
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MAINS
E-NNI
XML i/f
MPLS-TP/WSON
Mesh
Backbone segment
OBST
Mesh
XML i/f
OPST
Ring
Metro/regional segment
Access
IT&Optical Network Convergence work in
progress @IETF [1]
A GEYSERS-inspired functional architecture
• L.
Contreras, A. Tovar, G. Landi, N. Ciulli, “Architecture for Service
Provisioning with Cross Stratum Optimization”, Internet-Draft, work in
progress, draft-contreras-cso-functional-architecture-00, October 2011
Path Computation Element requirements for CSO
• A. Tovar, L. Contreras, G. Landi, N. Ciulli, “Path Computation Requirements
for Cross-Stratum-Optimization”, Internet-Draft, work in progress, drafttovar-cso-path-computation-requirements-00, October 2011
An architecture for CSO enabled Path Computation
• D.
Dhody, Y. Lee, N. Ciulli, L. Contreras, O. Gonzalez de Dios, “Cross
Stratum Optimization enabled Path Computation”, Internet-Draft, work in
progress, draft-dhody-pce-cso-enabled-path-computation-01, March 2012
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Conclusions
 NGPON2
• OFDM is not mature enough for standardization
 Multilayer coordination
• The current standards need to be extended to suggest new configurations (e.g. new
TE-Links) to the VNTM.
• UNI is currently being extended
• Multilayer PCE, VNTM and UNI can cooperate together.
 Multidomain optical networks
• Hierarchical PCE is a good candidate to enable multi-domain interworking.
 Subwavelegths
• Commom termionolgy is being standardized at ITU-T
• GMPLS extensions to be proposed at IETF
 Flexgrid
• ITU is standardizing the date plane
• Frawework has just started in IETF… GMPLS/PCE extensions to be done.
 IT and Optical network Convergence
• First steps taken at IETF
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