Transcript NOBEL - WP5 - Overview, Objectives & Status

NOBEL Technical Audit
WP1 Objectives & Achievements
March 08, 2006
Workpackage 1
Architectural aspects for end-to-end services
Andrea Di Giglio
NOBEL Objectives
 To define requirements, architecture and solutions for core-metro IPWP1 over-optical networks for broadband end-to-end services
 To study advanced network functionalities such as multi-layer traffic
engineering and multi-layer resilience
 To make techno- and socio-economic analysis of core and metro
case-studies
 To find packet/burst switching techniques and technologies
 To discover innovative solutions for the three network planes:
management, control and transmission
 To define multi-service/multi-layer node architectures and to
prototype the implementation of some selected node functionalities
 To assess existing technologies, components and sub-systems
 To integrate some test beds where to validate the project results
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NOBEL Innovation
To define requirements, architecture and solutions for core-metro IP-overoptical networks for broadband end-to-end services
objective
Main Areas
State-of-Art and Open Issues
Innovation by NOBEL
1. Network architecture and
solutions for core metro
In the last decade Network Providers largely deployed
Sonet/SDH in core and metro transport networks. Further
investments have been made in the last few years for
introducing WDM point-to-point systems in the core long-haul
networks. Nevertheless these network were basically
designed for leased lines and voice service. Now all
applications are migrating to IP.
The NOBEL vision is based on ASON/GMPLS network
solutions maybe integrated in the future with innovative
burst/packet switching techniques. The NOBEL solutions will
allow a full integration of data, voice and video transport
(fixed and mobile) reducing costs, increasing the operational
efficiency and improving the quality of end-to-end broadband
services.
2.
Multi-layer
Network
Advanced
functionalities:
Multi-layer
network
resilience
A cohesive resilience approach is missing and this is causing
in current multi-layer networks contentions among layers and
inefficiencies.
NOBEL is proposing multi-layer resilience solutions to
optimize the allocation of network spare resources (thus
reducing CAPEX), and to avoid contentions among layers.
2.
Multi-layer
Network
Advanced
functionalities:
Multi-layer
Traffic
Engineering
Current networks don’t allow an integrated multi-layer
resource and QoS optimization, thus resulting in waste of
CAPEX and reduced efficiency.
NOBEL is proposing Multi-layer Traffic Engineering concepts
to optimize resource and avoid congestions.
3. Network Management and
Control
Current networks are managed through long and rather
unefficient provisioning procedures, with a negative impact on
OPEX and Customers’ satisfaction.
The NOBEL control plane solutions will allow automatic
provisioning of connections and automatic network discovery
(OPEX reduction). Also, the inter-working between control
and management Planes will allow a more efficient
management of the network.
4. Transmission aspects
Until now, the full exploitation of (true) optical transparency
has been prevented by the difficulty of the dynamic
esthablishment of optical paths.
The NOBEL control plane will enable the dynamic
configuration and esthablishment of transparent, adaptive
optical paths through the transport network.
5. Network Services
Bandwidth on demand services are desirable but not easily
compatible with existing network technology.
The NOBEL control plane will enable the offering of a new
class of services: e.g. Bandwidth on Demand and Dynamic
Optical VPN network services, etc
WP1
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WP1 detailed objectives
 to identify, from the perspective of the services as perceived from the
end customer, the main drivers for the evolution of core and metro
optical networks supporting end-to-end broadband services; to derive
technical requirements from the above results;
 to define the architectural requirements for transparent core and
metro optical networks;
 to define evolutionary network scenarios for a seamless inter-working
between core, metro and access network segments for the transport
and management/control planes;
 to identify cost-effective, high-quality architectures and network
solutions based on an optimum combination of packets (such as IP,
Ethernet,...) and circuits (such as SDH, OTN,...) thus
collapsing/simplifying the network hierarchy;
 to study the functional requirements and the applicability of automatic
provisioning, switching routing and discovery in multilayer/domain/service networks (for example in GMPLS);
 to contribute on the above issues to the related standardisation
bodies (e.g. ITU SG15, OIF and IETF)
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WP1 activities
 Analysis and definition of drivers and network
requirements for core and metro networks supporting
end-to-end broadband services for all
 Definition of network scenarios and solutions for core and
metro networks supporting end-to-end broadband
services for all
 Definition of requirements, network scenarios and
solutions for extending optical transparency
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WP1 Deliverables
 D6 - Preliminary definition of drivers and requirements for
core and metro networks supporting end-to-end
broadband services for all (M8)
 D11 - Preliminary definition of network scenarios and
solutions supporting broadband services for all (M12)
 D21 - Definition of drivers and requirements for core and
metro networks supporting end-to-end broadband
services for all (M18)
 D30 - Definition of network scenarios and solutions
supporting broadband services for all (M24)
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WP1: working methodology (Y2)
networks.
Mesh mesh
networks
genete traffic traffic
Generated
TRAFFIC
EVOLUTION
ARCHITECTURE
MODIFICATIONS
ADVANCED
NETWORK
+
DEVICES
AVAILABILITY
ROADM, OxC, etc.
ROADM,OXC,etc.
CONTROL
PLANE
CONTROL
PLANE
DEVELOPMENT
DEVELOPEMENT
Moredistributed
distributed intelligence
More
intelligence
Main applications’ requirements
Main available network services
Architectures for services
Available
& future
technologies
Important
Bottlenecks
Fixed-Mobile
Convergence
Network
Scenarios
Network project rules
Network design
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D21: “Definition of drivers and requirements for core and metro
networks supporting end-to-end broadband services for all ”
 Environmental drivers - reflect changes that have been happening in
the telecommunication business environment over the past decade and a half.
In this period, the global telecommunications industry as a whole has been
gradually moving away from the model of state-owned and/or regulated
monopolies to that of a competitive industry operating in an open market
 Service/market drivers - reflect the continuously expanding set of
capabilities and features customers in various markets demand to satisfy their
constantly evolving set of personal and professional needs, as either end users
of services (consumers) or intermediaries (wholesalers) who enhance the
acquired services and offer them to their customers.
 Technology drivers - include all the technological enablers a service
provider, in partnership with its vendors, can take advantage of in the process of
architecting and composing its service portfolio.
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D21: “Definition of drivers and requirements for core and metro
networks supporting end-to-end broadband services for all ”
QoS parameters
Set up time
Maximum delay
Mean delay
Packet loss rate
High
Network
availability
Medium
Blocking
probability
BW Low
< 0.1%
> 99.99%
<1s
< 50 ms
*
< 5 E-5
< 0.1%
> 99.9%
<1s
<1s
*
< 1 E-3
< 1%
> 99%
<3s
<1s
< 200 ms
< 1 E-2
*
*
*
*
*
*
QoS
Real time
Streaming
Legacy and Gaming
IP telephony
UMTS
Transactional e-buy
Best effort
e-mail,
domotics,
VoIP
Video
conference,
grid
computing
Remote
backup,
network
supervision
TV and Video
Broadcast
Telnet
SAN
p2p file
exchange,
Data
acquisition
VoD
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D21: “Definition of drivers and requirements for core and metro
networks supporting end-to-end broadband services for all ”
data
plane
Customer view
RC
CC
Network services (Nobel Classification
since D6):
RC
CC
RC
CC
Control
plane
ccc
ncc
ccc
 Public IP
 Business IP
RC
CC
ccc
RC

CC
 VPN on layer 1
 VPN on layer 2
 VPN on layer 3
Customer created VPNs
Provider created VPNs
data
plane
Operator view
data
plane
Customer view
RC
CC
RC
CC
RC
CC
RC
CC
Control
plane
RC
CC
data
plane
Operator view
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D21: “Definition of drivers and requirements for core and metro
networks supporting end-to-end broadband services for all ”
 The migration toward the future transport infrastructure should protect
and leverage current multi-service and IP networking investment to
offer carriers a competitive advantage.
 IP-centric infrastructure and performance, providing an overall
solution that delivers QoS support, traffic engineering capability, and
robust control for IP networking is essential for the realization of the
envisioned IP-orientation for capacity expansion and cost reduction.
 Efficient transport layers at Layer 2 and layer 1, allowing the
necessary transport technology for the IP-centric infrastructure.
 The interworking of multi-service switched networks and IP routed
networks, which coexist at both the access and backbone, demands
a flexible, robust solution in the evolution phases.
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D30: “Definition network scenarios and solutions supporting
broadband services for all”
Medium-term
2009-2010
End to End (SIP etc)
Routing (signalling)
Signalling per domain
vendor specific signalling for
restoration only
End to End (SIP etc)
Routing (signalling)
Signalling End to End
Signalling (routing)
Per domain
End to End (SIP etc)
Per Domain
Per Layer
Per Domain
Per Layer
Per Domain
Per Layer
Per Domain
Per Layer
SDH
MPLS
L2/L1
IP/MPLS
L2/L1
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OTH
Integrated Routing
& signalling (End to End)
Per Domain
Across Layers
Data plane
NextGen. Layer L2
Control
plane
Ethernet
Protocol agnostic
adaptation
SDH
OTH
Protocol agnostic
adaptation
Session
IP
Long-term
2011-2015
Mgmt
plane
Short-term
2006-2008
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D30: “Definition network scenarios and solutions supporting
broadband services for all”
Term
Year
Focused network service evolution
Network evolution
2006 - 2008
2009 - 2010
L1, L2, L3 VPN, Broadband on
Demand
Data aware control plane at multiple layers.
Management integration across layers.
Data aware control plane integration.
Possibly migration towards OBS-like solutions in some areas of
the network.
Multilayer traffic engineering and resilience mechanisms
L3 VPN
Medium
Increasing of mesh domains
Data-aware data plane (IP and protocol agnostic L1 interfaces)
Deployment of 40G technology.
Dynamic wavelength routing.
Vertically integrated control plane
Short
Increased bandwidth availability: increase of link and node
capacity
(with no dramatic change in architecture).
Increased flexibility in the optical layer by ROADM.
Increased optical transparency.
Horizontal integration of the WDM layer by static by-pass of
nodes.
Migration to an initial mesh architectures, mainly realized by
ROADMs;
the mesh topology, probably appears as cells/ domains
Fixed and mobile convergence over IP networks
Single layer control plane implementations
Next-generation SONET/SDH for
sub-GigE services
Ethernet transport
L2, L3 VPN
2011 - 2015
Long
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Key points of network vision
 The IP layer is the convergence layer of the core.
 Ethernet is a candidate for being convergence layer in
access and metro segments.
 Ethernet services and Ethernet transport will become
increasingly important.
 The NOBEL long term vision includes:
• A fully integrated control plane (vertically and horizontally) based on
the ASON architecture and the GMPLS protocols.
• Optically transparent networks with wavelength routing (supporting
LSPs with fibre and lambda encoding type).
• GMPLS controlled L2 (Ethernet) switching
 OBS/OPS is part of an extended long term scenario
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D30: “Definition network scenarios and solutions supporting
broadband services for all”
Bottleneck to solve
Technology Options
Reduction of complexity –
today's plethora of
IP/Ethernet as dominant
technologies and protocols
technologies
must be reduced
Reduction of OEO
Reduction of OEO
conversions
order
conversions in in
order
to reduce
Optical transparency
the numberthe
of expensive
to reduce
number Optical transparency
transponders
of expensive
The provisioning time of
transponders
bandwidth adjustment
switching has to be reduced
Discovering and (partly)
control of network resources
GMPLS/ASON control plane
is done manually, therefore
the cost of management is
very high
Complexity of management
increases.
Downtime of network in case
of failures should be
Resilience (self healing)
minimized
The cost per bit has to be
reduced.
Increase in transport
efficiency e.g.: better
modulation formats, optical
Bandwidth utilization of
burst/packet switching, higher
packet-over-SDH is not
bitrates, denser wavelength
efficient.
channels
Need for fast and flexible
bandwidth adjustment
Influence on
CAPEX
OPEX
A single dominant technology A single dominant technology
will cause cost reduction due will reduce cost for training of
to effect of large quantities
the required qualified staff
New services
Seamless services can be
created more easily,
especially if IPv6 comes into
play
Broadband services Decrease of CAPEX neutral
Broadband services (like
Decrease of CAPEX since
neutral
(like L1VPN)
less OEO
L1VPN)
lesssince
OEO conversions
are
needed
conversions are
-
needed
Increase in CAPEX will be
over-compensated by OPEX
savings
Massive savings due to easier
installation procedures and
easier management
procedures
-
New hardware needed,
Massive savings due to semimoderate increase of cost for automatic network operation
software
New services will be possible New hardware will be needed, neutral
due to reduced price tag
however, the relative cost for
Flexible broadband services
new equipment will be
can be created
reduced
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D30: “Definition network scenarios and solutions supporting
broadband services for all”
Metro networks
Icons meaning
DSLAM
GE-DBORN
Aggregation ring
Passive Optical Ethernet
A/ D nodes
IP/ MPLS service
Router
1GE upstream I/ f
(working+ protect.)
1GE downstream I/ f
(working+ protect.)
Pros
Pros
•
Optical transparency
•
Multiplexing
•
Asymmetric Traffic
•
Reduction costs (about 15% on
CapEx respects to RPR)
•
•
High Scalability
Very fast resilience (50ms)
Cons
•
High costs
Cons
•
Low scalability for shared media
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D30: “Definition network scenarios and solutions supporting
broadband services for all”
Backbone networks
Network Costs (CAPEX)
Network
Costs (CapEX)
350
IP/WDM
IP/OTN
300
costs [cost units]
250
IP/WDM
200
150
100
50
0
X1
X2
X4
traffic
trafficamount
amount
Routing transit traffic
Routing
transit traffic
IP/OTN
percentage of traffic switched by routers
80,00%
IP/WDM
IP/OTN
70,00%
60,00%
50,00%
40,00%
30,00%
20,00%
10,00%
0,00%
X1
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X2
traffic
traffic amount
amount
X4
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Conclusions
 WP1 reached the objectives defined for Year 2.
– D21 and D30 completed the preliminary results presented on D6 and D11 on:
•
Characterization of emerging applications in terms of QoS parameters and requirements
•
Definition of L3-L2 and L1 network services for the end-to-end delivery of applications (according to
certain QoS requirements) to the Customers (both residential and Business - Wholesale and Retailed)
•
Architectural guidelines for metro and core network for medium- and long- term evolution
– Development of particular themes like:
•
Optical transparency
•
Virtual Private Networks
– reinforcing EU position in Standardisation Bodies and Fora (ITU, OIF, IETF);
creating a consensus view on a common European network vision with advanced
and innovative solutions for B4all.
 The analysis of architectures and solutions will constitute an important share
of NOBEL Ph.2 WP1, concentrating the effort in:
– definition of architectural solutions for transport networks supporting both fixed and
mobile services to perform a complete study on fixed and mobile convergence
– Cost effective, flexible, scalable network architectures with new L2 (burst/packet)
techniques.
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