ITU-T Kaleidoscope Conference
Innovations in NGN
EuQoS: End-to-End QoS over
Heterogeneous Networks
María Ángeles Callejo Rodríguez
Telefónica I+D
macr@tid.es
Geneva, 12-13 May 2008
Index
Motivation
Basic principles of the EuQoS system
Our proposal
Architecture
Reference points
QoS Provisioning
Strengths of the EuQoS system
Conclusions and next steps
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Motivation
Current QoS provisioning approach is mainly based on
overprovisioning, but this option is not flexible for meeting new
applications/services requirements
End-to-end QoS is a mandatory requirement to enhance QoE for
new multimedia applications
Important: the Home Gateway should be also considered as the intitiator
and/or terminator of the communication.
Current status:
E2E guaranteed QoS solutions are not available
The local solutions are technology dependent
QoS must be usually manually configured
In today’s networks the end users do not really
perceived the QoS as a real operator service
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Our Proposal
To build a new network service Æ Advanced
Connectivity on Demand
To provide E2e differentiated connetivity based on
e2e QoS guarantees for specific users’ flows
The QoS is a User’s choice Æ Neutral environment
The user can choose between a set of e2e CoSs in any
access technology
… Telcos can leverage the value of the
connectivity even when the customer is using third
party applications from Internet
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Design Principles
To allow the users to select the QoS for each application (meeting
Net Neutrality requirement)
The main goal is to design a QoS on demand framework
This framework can be used by the end user (for Internet applications),
operator (for Triple Play services) and by other service providers
Æ To take advance of third party applications
To define a network technology independent layer able to
synchronise intra and inter domain proccesses
To specify open interfaces
To use the system with any application
To integrate new network technologies
To build an Innovation Friendly Framework
to provide end-to-end QoS network services
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Current Status
Where there is / will be soon any QoS solution, it:
is technology dependent
does not have end-to-end significance
Static
Static
ISP1
ISP2
“SLA”
“SLA”
ISP3
Off-line
process
Off-line
process
WiFi
Core IP
network
Geneva, 12-13 May 2008
“QoS” connection
“QoS” connection
First ITU-T Kaleidoscope
Conference – Innovations
in NGN
xDSL
“QoS” connection
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EuQoS Solution
technology-independent layer added
QoS signalling capabilities added to the applications (terminals)
ISP1
Static
“SLA”
ISP2
Static
“SLA”
ISP3
Integrated, technology independent resource management plane
Off-line
process
Off-line
process
Technology-specific resource allocators
On-line
QoS sign.
function
On-line
QoS sign.
function
WiFi
Core IP
network
xDSL
Geneva, 12-13 May 2008
End-to-end
connection “QoS” connection
“QoS” connection
“QoS”QoS
connection
First ITU-T Kaleidoscope
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EuQoS Deployment
Legacy aplication signalling
USER 1
USER 2
Application
Application
Application
Signalling
Application
Signalling
Service Plane
AQ-SSN
QCM
AQ-SSN
QCM
Control Plane
Network Technology Independent layer
RA1
Transport
Protocols
Access
Network
1
NSIS
RM
RM2
COPS
RM1
COPS
NSIS
Network Technology Dependent layer
RA
RA2
QoS
Domain
j
Transport
Protocols
Access
Network
2
EQ-path
Transport Plane
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First ITU-T Kaleidoscope Conference – Innovations in NGN
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Service Plane functionalities
To offer an open interface to the end-user
Æ the QoS on demand service
To manage user access to network resources
(Authentication), granting services and QoS level to
the requesting user (Authorization) and collecting
accounting data (Accounting)
Diameter server is used as AAA Server
Charging functions are also covered at this Plane.
User provisioning function
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Control Plane functionalities
Network Technology
Independent
EQ-SAP interface to the service
plane and to the Residential
Gateway
Resource and Admission Control
Verification of resource
availability
Final decision Point
Network selection
Operator policies
Network interdomain topology
maintenance
Network Resource maintenance
Network Technology
Dependent
QoS and Priority mapping
Gate Control
IP Packet Marcking and Rate
Limiting Control
Technology Dependent decision
point
Intra domain topology
maintenance
Resource control and
configuration of the transport
elements
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
10
EuQoS Main Reference Points
AP
SO
QoS on
demand
EuQoS User
Service Plane
EQ-SAP
Technology
Independent
NS
IS
Home
Gateway
Control Plane
Technology
Dependent
Transport Plane
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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User’s view…
How can I use EuQoS?
EuQoS Clients
APP
QCM
Flows
E2E CoS
BW
APP
EuQoS Server
QCM
APP
Web
Browser
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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QoS Provisioning Processes
Goal to build, use and monitor the EQ-Path
Provisioning process (time scale: hours/days)
Loose model: reachability per CoS is announced among
different ASs using EQ-BGP.
Resources are provisioned per CoS in different ASs but are
bound to the EQ-Paths during the invocation process
Hard Model: resources are reserved in the transit
domainds using EQ-Links set up as DiffServ MPLS-TE
tunnels (computed using the PCE)
Invocation process (launched per user request)
It uses the EQ-Paths by selecting the most appropriate one
and by applying CAC and configuration in the different
domains
OAM protects from failures
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Strength 1: Open architecture …
... To End Users
End users have 2 interfaces: QoS on demand service and
the EQ-SAP for trusted terminals
End Users can ask the EuQoS system for QoS guarantees
without changing the applications
In contrast to IMS, where SIP is required to interact with the
P-CSCF
… To integrate new Network Technologies
Clear interface between NTI and NTD level
E2E CoS are specified and used by the clients.
The NTD depends on the underlying network technology
and just needs to map the E2E CoSs to specifc technology
CoSs
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
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Strength 2 & 3: Implementation of
different prototypes and validation
4 prototypes have been implemented
Integration of MPLS, UMTS, Ethernet, xDSL, WiFi and
Satellite
QoS Provisioning processes
The tests have been carried out with Internet
applications, such as VoIP, on-line gaming,
videoconferencing and video streaming
Performance tests have shown quite promising
results for a prototype
up to 20 sessions/s are supported with a Java based
implementation
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
15
Strength 4: A new challenge for
Network Providers
EuQoS provides a framework to offer QoS
guarantees that can be used:
For different Internet applications
With different devices, since the session request is simple
EuQoS is an opportunity to take adavantage of the
new Internet applications to increase their revenues
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
16
Conclusions
EuQoS offers to the end user a differentiated
connectivity that provides e2e QoS …
… Over heterogeneuos networks …
… And meeting Net Neutrality requirement
Following the Internet model, EuQoS main
attribute is its openness to:
To be used with any application
And to integrate new technologies
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
17
Next Steps
Geneva, 12-13 May 2008
First ITU-T Kaleidoscope Conference – Innovations in NGN
18
Thank you
Geneva, 12-13 May 2008