Área: Lorem ipsum Razón Social: Telefónica CAON Standardization Activities Telefónica I+D Juan...

Área: Lorem ipsumRazón Social: Telefónica

CAON Standardization Activities

Telefónica I+D

Juan Fernandez-Palacios Telefonica I+D. CAON co-chair


FSAN: Optical access standardization (i.e NGPON2)

IETF: Control plane standardization

Key standardization fora


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


IETF Standardization Task Force

Technologies Intra-carrier Inter-carrier

Single Domain Multidomain

Packet Switching (IP, MPLS-TP, etc)

Wavelength Switching

Sub-wavelength Switching

IT and network integration (Cross Stratum)

MAINS (CCAMP, PCE, MPLS-TP OAM)

GEYSERS (CSO)c

STRONGEST (PCE, MPLS-TP OAM)

ONE , CHRON

ETICS (PCE, CCAMP,

PCN, CDNI, …),

Lots of potential sinergies and collaboration activities within IETF

GEYSERS


Innovation challenges in core networks

Photonic Transport Transmission

ROADM ROADM

ROADM

ROADM

Cost efficient high speed transmission up to 1 Tbps- Flexible Grid. Pure optical subwavelength switching.

Multilayer coordination

Resource optimization through multilayer planning.

OPEX savings from coordinated planes.

IP Network

Separated provisioning and OAM in different segments (IP & Aggregation). End-to-end MPLS solutions to lower OPEX

IP/MPLS core MANMAN

Fiber link

Photonic Control Plane

Multi-vendor interoperability

Algorithms for Efficient use of available resources

E2EMPLS – gluing segments to simplify operation and provisioning

Multilayer Coordination to optimize resources

100 Gbps+ Variable rate transponder

Photonic Control Plane GMPLS + PCE Allowing cost efficient Multivendor network

Cost EfficientPhotonic Transport Network

End to End MPLS network

Flexible Grid


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.


Multi-Domain Interworking: H-PCE


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 optical spectral bandwidth for high bit-rate systems.

• 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), draft-ogrcetal-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…


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 Client/Server

MAINSE-NNI

MAINS GMPLS CP

MPLS-TP/WSON Mesh

StandardGMPLS CP

MAINS NSI(MNSI)

Application Server(s)

Access AccessOPST Ring

OBST Mesh

MAINS NSI(MNSI)

OPST Ring

OBST Mesh

MAINSE-NNI

XML i/f XML i/f XML i/f XML i/f

Metro/regional segment Metro/regional segmentBackbone segment

Application layer

MAINS GMPLS CP


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, draft-tovar-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


ConclusionsNGPON2

• 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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