Feb. 21 2008 On*Vector Workshop Semantic Web for Hybrid Networks Dr. Paola Grosso SNE group...

Semantic Web for Hybrid NetworksFeb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Dr. Paola GrossoSNE group

University of AmsterdamThe Netherlands


On*Vector Workshop

… the long title

Semantic Web-based Distributed Information Systems to Master Hybrid Networks.

Keywords (and agenda):

- Semantic Web- Distributed Information Systems- Mastering Hybrid Networks -> Control Planes


On*Vector Workshop

Semantic Web

Semantic Web organizes data so that is contains ‘meaning’ that can be understood by machines and applications.

RDF - Resource Description Framework - provides a way to categorize information:- resources are described by URIs;- triplets define the relations between resources:

Why? The need to inject more meaning into user requests to the network management planes, more meaning available to take decisions within the management plane.

ObjectSubjectPredicate


On*Vector Workshop

Distributed informationConcept of indendently maintained distributed information fits the

hybrid networking world and its different administrative domains.

References between resources, both internally to a document and externally with the use of URIs.

Leverage existing RDF tools.

Domain ANDL

Domain BNDL

seeAlso()


On*Vector Workshop

Control Planes

Some issues:- what level of detail needs to be exposed abstraction problem;- how do you exchange information between domains:push or pull;- who has right to see what: policies.

Control planes setup the inter-domain and intra-domain paths.

They need up-to-date and consistent information.


On*Vector Workshop

Network Description Language

Choice of RDF instead of XML syntaxGrounded modeling based on G0805 description:

Article:

F. Dijkstra, B. Andree, K. Koymans, J. van der Ham, P. Grosso, C. de Laat

"A Multi-Layer Network Model Based on ITU-T G.805"


On*Vector Workshop

Schemas

The result:• Topology schema

describes devices, interfaces, links and connections between them on a single layer.

• Layer schemadescribes specific network technologies and the relation between

network layers.• Capability schema

describes device capabilities.• Domain schema

describes administrative domains, services within a domain and how to give an abstracted view of the network in a domain.

• Physical schemadescribes the physical aspects of network elements.

• Plus nine technology schemata.


On*Vector Workshop

UML diagram

Diagram allows easier comparisons with other models.


On*Vector Workshop

Topology schema

A vocabulary for defining network topology on a single layer.


On*Vector Workshop

Multi-layer schemas

A vocabulary for defining network layers and interrelations between layer networks.


On*Vector Workshop

ToolsTo facilitate adoption we provide NDL creation and

validation tools.


On*Vector Workshop

Demonstrations: SC|06

Goal: to show that with one NDL file per GLIF GOLE we can find a suitable path along the various domains.:

http://trafficlight.uva.netherlight.nl/NDL-demo/sc-demo-test/pathfind-new.htm


On*Vector Workshop

SC|07

Goal: To show that we can do path finding in a (realistic) multi-layer network:

http://ndl.uva.netherlight.nl/Glif-Demo-Sep07


On*Vector Workshop

Standardization

A global need for exchange-able topologies:different control planes that want to cooperate.

Forum for this activity is the Open Grid Forum - OGF.

So far…. NDL, PerfSONAR, cNIS, iShare, Grid5K contributions toward the definition of one model.


On*Vector Workshop

NML-WG

Co-chairs: Martin Swany (UDelaware) and Paola Grosso (UvA)

Purpose: to describe network topologies, so that the outcome is a standardized network description ontology and schema, facilitating interoperability between different projects.

The scope is to define one or more schemas to describe:• a layer independent network topology • properties that are common across multiple network technologies,• a mechanism so that other working groups or other projects may combine technology specific

schemas with the schemas created by the NML working group.

Such a schema can be used to create inter-domain network graphs at various abstraction levels, to provide an information model for service discovery, and to facilitate lightpath provisioning.


On*Vector Workshop

From network to applications

From the physical architecture

To the semantic model for the architecture


On*Vector Workshop

Semantic Reasoning


On*Vector Workshop

Conclusions

The major NDL results:- adoption in the GLIF for the description of GOLEs;- definition of path finding algorithm in multi-layer

network;- basis for research into domain abstraction;- part of the standardization effort from the networking

community.

From the Semantic Web approach we see a promising new research line: semantic for end-to-end applications control.


On*Vector Workshop

Links

NDL homepage:http://www.science.uva.nl/research/sne/ndl/

NML-WG:https://forge.gridforum.org/sf/projects/nml-wg

Thanks to the NDL team!In particular to Freek Dijkstra and Jeroen van der Ham

Feb. 21 2008 On*Vector Workshop Semantic Web for Hybrid Networks Dr. Paola Grosso SNE group...

Documents

Transcript of Feb. 21 2008 On*Vector Workshop Semantic Web for Hybrid Networks Dr. Paola Grosso SNE group...