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An Architecture for An Architecture for Supporting Future Internet Supporting Future Internet Applications Applications Sebastian Mies Institute of Telematics, University of Karlsruhe (TH), Germany The SpoVNet Consortium: University of

SLIDE 1

An Architecture for An Architecture for Supporting Future Internet Supporting Future Internet Applications Applications

Sebastian Mies Institute of Telematics, University of Karlsruhe (TH), Germany

The SpoVNet Consortium: University of Karlsruhe (ITM), University of Mannheim (PI4), University of Stuttgart (IPVS, IKR), University of Tübingen (RI) www.spovnet.de

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Future Internet Future Internet

Internet has evolved from 4-node network to ubiquituous, global communication network However: Patchwork design and deployment problems

“half” layers: IPsec, MPLS (2.5); TLS (3.5) … TCP adaptations to wireless, mobile etc. Multicast, MobileIP Deployment? But … is it flexible enough for the future?

How to improve flexibility?

Calls for new architectures !? Clean slate … time horizon of 10 years and more? Overlay-based architecture … the way SpoVNet goes!

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

Spo Spontaneous ntaneous V Virtual irtual Net Networks works Objectives Objectives 1) Provide communication services flexibly, adaptively and spontaneously on top of heterogeneous networks 2) Enable seamless transition from current to future networks

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Objective 1: Objective 1: Communication Services Communication Services Extensible set of services implemented by

verlays

Spontaneous and flexible per application No infrastructure support required Self-organizing, scalable and robust

Overlays designed to be underlay-aware

Adaptive due to cross-layer information, e.g.

Handover events, congestion status …

Handling of heterogeneous networks

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

ISP A

SpoVNet SpoVNet Overlay Overlay

Access Networks

SpoVNet Overlay Link SpoVNet Node SpoVNet Booster Node

Fixed Cell

WLAN Hotspot

ISP B

SpoVNet Node

Identifier (NodeId): 63964d5133248bb908b101a59825df00544eb7ab Locator Set:

IPv4( 141.71.120.71, 2010 )
IPv6( 7482:9186:a8bf:28a8:abf7:1cb0:a03d:130d, 2032 )

SpoVNet Overlay

UUID=db043b20-55cb3a47- b2eb0b5a-ebf4e114- a8c24a5a

07/24/2007 The SpoVNet Architecture − Sebastian Mies

ISP A

SpoVNet SpoVNet Overlay Overlay with with Booster Booster Nodes Nodes

Access Networks

SpoVNet Overlay Link SpoVNet Node SpoVNet Booster Node

Fixed Cell

WLAN Hotspot

ISP B

SpoVNet Booster Node

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

ISP A

Multiple SpoVNet Multiple SpoVNet Overlays Overlays

Access Networks

SpoVNet Overlay Link SpoVNet Node SpoVNet Booster Node

Fixed Cell

WLAN Hotspot

ISP B

SpoVNet Overlay

UUID= db043b20-55cb3a47- b2eb0b5a-ebf4e114- a8c24a5a

SpoVNet Overlay

UUID= a89e1459-88657410- cac20f01-b01bd75d- 1bbcc2cb

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Objective Objective 2: 2: Seamless Seamless Transition Transition to Future Networks to Future Networks Provide a framework that

1) Allows comfortable creation of application supporting services in heterogeneous networks 2) Assures that these services can be incrementally replaced by evolving underlay services

Two-tier abstraction architecture

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

Two Two-

Tier Abstraction

Tier Abstraction

Underlay Application Service abstraction Underlay abstraction SpoVNet base SpoVNet services

Facilitates comfortable creation of new services New Service Allows to replace SpoVNet services with underlay services

Service

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Underlay Abstraction Underlay Abstraction

Provides abstract transport connectivity hiding mobility, multi-homing and heterogeneity

Example:

1.Service requests a connection, e.g.

CreateConnection CreateConnection( NodeId, QoSReq, SecurityReq )

2.Base Overlay resolves NodeId to locator set Handles multi-homing 3.Base Communication provides direct transport connectivity Selects appropriate protocols and network access Handles heterogeneity 4.Persistent connection handle is returned to service Locator set may change Handles mobility

SpoVNet Base Base Overlay Base Communication Link Layer IPv4 Services UDP TCP SCTP IPv6 Underlay abstraction

WLAN 802.3 UTRAN HSDPA

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07/24/2007 The SpoVNet Architecture − Sebastian Mies Underlay Abstraction

Service Abstraction Service Abstraction

SpoVNet services supply well-defined interfaces to the application

Multi- cast Events Application

Applications may utilize none, one or more SpoVNet services, for example a virtual world online game may use

the multicast service for data dissemination, e.g.

createGroup createGroup( MultiSource, QoSReq, SecReq )

and

the event service for in-game event notification, e.g.

subscribe subscribe( Id, EventClass, QoSReq, Listener )

Take advantage of incrementally evolving underlying network services

e.g. use source-routed multicast to enhance SpoVNet multicast service

Others Service Abstraction Underlay SpoVNet Services SpoVNet Base SRM

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Cross Cross-

Layer Abstraction

Layer Abstraction

Underlay Application Service Abstraction Underlay Abstraction SpoVNet Base

The Cross-Layer Information Overlay (CLIO) provides abstract cross-layer information Services and applications can now adapt autonomously to changing network conditions

SpoVNet Services

Cross-Layer Information Overlay CLIO

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

… … also also supported supported by by SpoVNet SpoVNet

Quality-of-Service

Meet constraints with help from CLIO or use underlay support

Overlay optimization based on cross-layer information
Monitoring of QoS parameter values

Security

Base overlay provides basic security building blocks Advanced security features provided by specific services

Robustness

Achieved, e.g. by supported redundancy in the overlay graph

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Brief overview of the SpoVNet architecture Application of SpoVNet

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

Virtual World Online Game Virtual World Online Game During the game, players may

move between access networks build sub-groups

Some communication requirements

Basic connectivity between players Dissemination of events to players nearby Intra-game group chat communication

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Virtual World Online Game Virtual World Online Game

Basic connectivity between all players

SpoVNet base overlay connects all nodes Each player can join or leave this overlay

Fixed Cell

WLAN Hotspot

Base overlay

SLIDE 9

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Virtual World Online Game Virtual World Online Game

Players must be informed about events inside the game

SpoVNet event service overlay to disseminate events

Fixed Cell

WLAN Hotspot

Base overlay Event service overlay Event messages 18

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Virtual World Online Game Virtual World Online Game

Players want to chat with each other

SpoVNet multicast service is used to exchange chat messages

Fixed Cell

WLAN Hotspot

Base overlay Multicast service overlay

f group 1

Multicast service overlay

f group 2

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07/24/2007 The SpoVNet Architecture − Sebastian Mies

Virtual World Online Game Virtual World Online Game

Players may move between access networks

Service overlays need to adapt

Fixed Cell

WLAN Hotspot

Multicast service overlay

f group 1

Adapted multicast service

verlay of group 2

Base overlay 20

07/24/2007 The SpoVNet Architecture − Sebastian Mies

Summary Summary

The SpoVNet objectives are to

provide adaptive, spontaneous communication services over heterogeneous networks enable seamless transition from current to future networks

SpoVNet fosters future services today and runs out of the box The SpoVNet project

supplies an architectural framework for flexible service provisioning by overlays features fundamental research on enhanced services

SLIDE 11

07/24/2007 The SpoVNet Architecture − Sebastian Mies

An Architecture for An Architecture for Supporting Future Internet Supporting Future Internet Applications Applications

Future Internet Future Internet

Internet has evolved from 4-node network to ubiquituous, global communication network However: Patchwork design and deployment problems

How to improve flexibility?

Spo Spontaneous ntaneous V Virtual irtual Net Networks works Objectives Objectives 1) Provide communication services flexibly, adaptively and spontaneously on top of heterogeneous networks 2) Enable seamless transition from current to future networks

Objective 1: Objective 1: Communication Services Communication Services Extensible set of services implemented by

Spontaneous and flexible per application No infrastructure support required Self-organizing, scalable and robust

Overlays designed to be underlay-aware

Adaptive due to cross-layer information, e.g.

Handling of heterogeneous networks

SpoVNet SpoVNet Overlay Overlay

SpoVNet SpoVNet Overlay Overlay with with Booster Booster Nodes Nodes

Multiple SpoVNet Multiple SpoVNet Overlays Overlays

Objective Objective 2: 2: Seamless Seamless Transition Transition to Future Networks to Future Networks Provide a framework that

1) Allows comfortable creation of application supporting services in heterogeneous networks 2) Assures that these services can be incrementally replaced by evolving underlay services

Two-tier abstraction architecture

Two Two-

Tier Abstraction

Underlay Abstraction Underlay Abstraction

Provides abstract transport connectivity hiding mobility, multi-homing and heterogeneity

Service Abstraction Service Abstraction

SpoVNet services supply well-defined interfaces to the application

Cross Cross-

Layer Abstraction

The Cross-Layer Information Overlay (CLIO) provides abstract cross-layer information Services and applications can now adapt autonomously to changing network conditions

… … also also supported supported by by SpoVNet SpoVNet

Quality-of-Service

Security

Robustness

Brief overview of the SpoVNet architecture Application of SpoVNet

Virtual World Online Game Virtual World Online Game During the game, players may

move between access networks build sub-groups

Some communication requirements

Basic connectivity between players Dissemination of events to players nearby Intra-game group chat communication

Virtual World Online Game Virtual World Online Game

Basic connectivity between all players

Virtual World Online Game Virtual World Online Game

Players must be informed about events inside the game

Virtual World Online Game Virtual World Online Game

Players want to chat with each other

Virtual World Online Game Virtual World Online Game

Players may move between access networks

Summary Summary

The SpoVNet objectives are to

provide adaptive, spontaneous communication services over heterogeneous networks enable seamless transition from current to future networks

SpoVNet fosters future services today and runs out of the box The SpoVNet project

supplies an architectural framework for flexible service provisioning by overlays features fundamental research on enhanced services

SpoVNet is funded by the Landesstiftung Baden-Württemberg within the Förderprogramm Informationstechnik Baden-Württemberg (BW-FIT)

Thanks! Questions? Thanks! Questions?